CN105715365A

CN105715365A - Novel efficient transformer substation maintaining device

Info

Publication number: CN105715365A
Application number: CN201610042232.2A
Authority: CN
Inventors: 杨林
Original assignee: Individual
Current assignee: Jiangsu Xinpeng Power Engineering Co ltd
Priority date: 2016-01-21
Filing date: 2016-01-21
Publication date: 2016-06-29
Anticipated expiration: 2036-01-21
Also published as: CN105715365B

Abstract

The invention discloses a novel efficient transformer substation maintaining device which comprises a transformer substation maintaining car and an engine connected with the transformer substation maintaining car. The engine is used for driving the transformer substation maintaining car and comprises a power part, a fuel injection system and a hydraulic part. The hydraulic part comprises a compression cavity, a pump cavity, a return cavity and a hydraulic loop, wherein the compression cavity is formed in the rear portion of the engine and provided with a first fuel port and a second fuel port, and the first fuel port and the second fuel port are connected with a compression energy accumulator through a first control valve and a second control valve correspondingly; the pump cavity is connected with a low-pressure fuel path and a high-pressure fuel path through one-way valves, and the low-pressure fuel path is provided with a return control valve and a low-pressure energy accumulator; a reducing valve is arranged on a fuel pipeline from a high-pressure energy accumulator to a cylinder body, and a starting valve is arranged on a fuel pipeline located between the compression energy accumulator and the high-pressure energy accumulator. The novel efficient transformer substation maintaining device is simple in structure, convenient to manufacture, high in scavenging efficiency, stable in performance and high in output torque; a complete control system and a complete position detecting system are designed.

Description

A kind of new and effective transformer station attending device

Technical field

The present invention relates to transformer station's maintenance field, be specifically related to a kind of new and effective transformer station attending device.

Background technology

Transformer station is voltage of transformation in power system, acceptance and distribution electric energy, controls the flow direction of electric power and adjust the electric power facility of voltage, and the grid contact of each step voltage is got up by it by its transformator.Modern transformer station floor space is wide, each equipment, as far in the distance each other such as transformator, outdoor breaker, therefore often to use maintenance cart when plant maintenance, to facilitate repair and maintenance.

How to reduce the operating power consumption of transformer station's attending device further and to improve efficiency, to be people's concerns always.Present large-scale substation maintenance cart, it is substantially with engine-driven, and the problems such as existing electromotor ubiquity structure excessively complicated, control is accurate not, output moment of torsion deficiency, therefore we can set about improving the performance of transformer station's attending device from this aspect.

Summary of the invention

For the problems referred to above, the present invention provides a kind of compact conformation, controls accurate, stable performance and export the new and effective transformer station attending device that moment of torsion is big.

The purpose of the present invention realizes by the following technical solutions:

A kind of new and effective transformer station attending device, including transformer station's maintenance cart and the electromotor that is connected with transformer station maintenance cart, electromotor is used for driving transformer station's maintenance cart, it is characterized in that, electromotor includes power section, injection system and hydraulic part, described power section includes breather check valve, power piston, combustor, fuel injector, scavenging port, hydraulic part includes compression chamber, pump chamber, return chamber and hydraulic circuit, described compression chamber is arranged at the rear portion of electromotor, it is provided with the first hydraulic fluid port thereon, second hydraulic fluid port, described first hydraulic fluid port, second hydraulic fluid port controls valve respectively through first and the second control valve is connected with compress energy storage device, described pump chamber is connected with low pressure oil way and high-pressure oil passage respectively by check valve, high-pressure oil passage is used for engine loading fuel feeding, low pressure oil way is provided with back level control valve and low pressure accumulator, return bypass on level control valve and be provided with return check valve；Described return chamber and high pressure accumulator are directly connected to, and are provided with air relief valve on described high pressure accumulator to the oil pipe line of cylinder body, state of starting operating and catch fire operating mode time air relief valve be held open, during nominal situation, air relief valve cuts out；Described compress energy storage device is connected by oil pipe line with high pressure accumulator, and is provided with startup valve on the oil pipe line between described compress energy storage device and high pressure accumulator, improves the compression ratio of electromotor during for start operating performance, starts valve and close during nominal situation；Described high-pressure oil passage is connected to a load accumulator, leads to a road and be connected with described compress energy storage device after air relief valve；The end of electromotor is provided with hydraulic pressure sacculus, is full of the pressure oil being previously implanted in hydraulic pressure sacculus, is connected with low pressure accumulator by oil pipe line, is additionally provided with spring loaded safety valve between hydraulic pressure sacculus and low pressure accumulator bottom it；The upper left side of described hydraulic pressure sacculus is provided with the dead band hydraulic fluid port of inclination, its place straight line is tangent with hydraulic pressure sacculus, dead band hydraulic fluid port is connected by the dead band return electromagnetic valve being arranged between with compress energy storage device, in operating mode of catching fire, when the end of piston component is in the dead zone location between the second hydraulic fluid port and hydraulic pressure sacculus, by opening ideally stop region that dead band return electromagnetic valve makes piston component return between the second hydraulic fluid port and the first hydraulic fluid port to start next stroke；Described injection system is high-pressure co-rail electric-controlling injection system, including high-pressure oil pump, common rail pipe, electric-controlled fuel injector, pressure transducer and electronic control unit, during electromotor work, under the effect of oil transfer pump, fuel oil enters high-pressure oil pump through cleaner, after the compression of high-pressure oil pump, low pressure oil becomes hydraulic oil, and inputted common rail pipe by high-pressure oil pump, in common rail pipe, electronic control unit receives the feedback of pressure transducer and controls pressure limiting valve, with force value in buffer rail and make it keep constant, subsequently hydraulic oil is inputted in electric-controlled fuel injector, wait the oil spout instruction of electronic control unit；

Described electromotor also includes position detecting system, position detecting system detects and sends signal when piston component arrival top dead center position, bottom dead center position and feed forward position by Linear displacement transducer and location triggered sensor, feed forward position is the side of close top dead center position between top dead center position and bottom dead center position, controlling the closedown of the first control valve during for start operating performance piston compression stroke, feed forward position detects system according to the velocity amplitude cooperation position of piston and determines；Described electromotor also includes constant-voltage driving system, and described constant-voltage driving system includes electromotor and hydraulic variable motor, keeps the constant of output oil liquid pressure by motor drive power square and load resistance square；Hydraulic variable motor is driven by exporting high-voltage oil liquid, and is coupled with load by deceleration device, and its discharge capacity is automatically adjusted with the change of operating pressure；

Described electromotor also includes start control system, normal operation controls system and fire controll system:

Start control system, for the control of engine start operating mode: after starting signal sends, be on valve and air relief valve, compress energy storage device is owing to connecting with high pressure accumulator and pressure rising, and the compression ratio of electromotor is improved；The signal of displacement transducer is detected by control unit of engine, if testing result display piston component is in lower dead center, then control valve by first and the second control valve is opened, piston component is under the effect of compress energy storage device, start compression travel, if be detected that piston component is not in lower dead center, it is first turned on back level control valve, hydraulic oil in pump chamber and compression chamber is released by low pressure oil way, piston component is made to be returned to bottom dead center position under the effect of high pressure accumulator pressure, close back level control valve, then start compression travel；When piston arrives feed forward position, second controls valve closes, when piston arrives after top dead center, first controls valve closes, return level control valve to open, piston component comes back to after bottom dead center, close back level control valve, piston component completes a cycle of operation, this process records the pressure and temperature value that piston component arrives during top dead centre in cylinder, when frequency valve start signal sends again, judge whether cylinder pressure and the temperature of a upper cycle index meet diesel-fuel ignition condition, if in-cylinder pressure and temperature are unsatisfactory for ignition condition, then repeat above-described work process, after meeting ignition condition until pressure and temperature, initially enter the control process of normal operation；

Normal operation controls system, control for electromotor nominal situation: after entering nominal situation, close and start valve and air relief valve, first controls valve maintains a normally open state, after starting signal sends, second controls valve opens, hydraulic oil in compress energy storage device first passes through the second control valve and enters compression chamber, piston component is promoted to move to top dead centre, after the first hydraulic fluid port is opened, second controls valve closes, connected by the first hydraulic fluid port between compression chamber and compress energy storage device, when piston component arrives oil spout position, trigger sensor, produce fuel injection signal, and control distributive value and make the ratio of compression time and the Bulking Time ratio equal to the volume change of two strokes of hydraulic pump, so that it is equal with compression flow to expand flow, to reduce the pulsation of electromotor output flow, fuel injection process is completed by injection system, at near top dead center, fuel combustion heat release, piston component returns to lower dead center under the effect of cylinder pressure, and control before valve is again turned on stable in lower dead center second；

Fire controll system, control for engine fire operating mode: in engine working process, after starting signal sends, all piston component position is carried out one-time detection, if engine frequencies and frequency change rate are respectively less than setting value, then detect the position of piston component, if piston component is not at bottom dead center position, and cylinder temperature cylinder pressure is less than value of catching fire, then think that electromotor catches fire in a upper circulation, now it is first shut off the first control valve, and open air relief valve and return level control valve, piston component is made to be returned to bottom dead center position, then first controls valve unlatching, wait next start dialing signal, electromotor moves according still further to normal operating cycle.

The invention have the benefit that 1, hydraulic system all can to load fuel feeding in compression and expansion process, and the string pressure string oil phenomenon that should not be able to occur between effectively anti-locking system；Coordinate each accumulator to reduce output flow pulsation, noise-decreasing；For the operation characteristic of each operating mode electromotor, devise new control system, can more precisely, efficiently control the operation of electromotor；2, between top dead centre and lower dead center, feed forward position is added, it is shut off frequency valve when start operating performance lower piston assembly arrives feed forward position, switch valve is turned off arriving after top dead center, so both ensure that the speed of compression travel, reduce again the resistance of expansion stroke, improve the work efficiency of electromotor on the whole and reduce journey time；3, by controlling the startup valve between high pressure accumulator and compress energy storage device, increase the compression ratio of electromotor, and output oil pressure will not be impacted generation hydro pulse, close after nominal situation and start valve, replace the method that traditional petrol station system heightens compression ratio, there is the feature of economical and practical simple in construction；4, in order to avoid returning opening by mistake and improving the precise degrees judged that catches fire of level control valve, take the position of cylinder temperature cylinder pressure and piston component as the main basis for estimation caught fire, simultaneously take account of the retardance that cylinder temperature declines, add the feed-forward signal of frequency and frequency variation rate (or change in displacement rate), namely first determination frequency and frequency change rate are less than setting value, then judge that whether piston is at bottom dead center position again, if it was not then open back level control valve；5, devise new hydraulic pressure balloon buffer unit and attached overpressure prevention device thereof, while playing buffering and superpressure preventing function, the hydraulic slip of electromotor can also be played certain supplementary function；6, by the setting of dead band hydraulic fluid port and dead band return electromagnetic valve, can effectively solve piston component to be difficult to return to the problem that lower dead center starts next stroke in dead zone location, arranged by tangent hydraulic fluid port simultaneously and reduce the wriggling time after piston component enters dead band, improve the whole efficiency of electromotor further.

Accompanying drawing explanation

The invention will be further described to utilize accompanying drawing, but the embodiment in accompanying drawing does not constitute any limitation of the invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to the following drawings.

Fig. 1 is the structural representation of this transformer station's maintenance cart electromotor；

Fig. 2 is the structural representation of injection system；

Fig. 3 is the position view in ideally stop region and dead band.

Accompanying drawing labelling: 1-compression chamber；2-second controls valve；3-first controls valve；4-compress energy storage device；5-the first hydraulic fluid port；6-the second hydraulic fluid port；7-pump chamber；8-high pressure accumulator；9-breather check valve；10-power piston；11-combustor；12-fuel injector；13-scavenging port；14-return chamber；15-resetting piston；17-returns level control valve；18-low pressure accumulator；19-compression piston；21-return check valve；22-air relief valve；23-starts valve；24-load accumulator；25-high-pressure oil passage；26-low pressure oil way；27-hydraulic pressure sacculus；28-mechanical safety valve；29-oil transfer pump；30-cleaner；31-high-pressure oil pump；32-common rail pipe；33-electric-controlled fuel injector；34-dead band hydraulic fluid port；35-dead band return electromagnetic valve；A-is stop region ideally；B-dead band.

Detailed description of the invention

The invention will be further described with the following Examples.

Embodiment 1: one new and effective transformer station attending device as Figure 1-3, including transformer station's maintenance cart and the electromotor that is connected with transformer station maintenance cart, electromotor is used for driving transformer station's maintenance cart, and electromotor includes power section, injection system and hydraulic part, described power section includes breather check valve 9, power piston 10, combustor 11, fuel injector 12, scavenging port 13, resetting piston 15, compression piston 19, hydraulic part includes compression chamber 1, pump chamber 7, return chamber 14 and hydraulic circuit, described compression chamber 1 is arranged at the rear portion of electromotor, is provided with the first hydraulic fluid port 5 thereon, second hydraulic fluid port 6, described first hydraulic fluid port 5, second hydraulic fluid port 6 controls valve 3 respectively through first and is connected with compress energy storage device 4 with the second control valve 2, described pump chamber 7 is connected with low pressure oil way 26 and high-pressure oil passage 25 respectively by check valve 9, high-pressure oil passage 25 is used for engine loading fuel feeding, being provided with back level control valve 17 and low pressure accumulator 18 on low pressure oil way 26, on time level control valve 17, also bypass is provided with return check valve 21；Described return chamber 14 is directly connected to high pressure accumulator 8, is provided with air relief valve 22 on described high pressure accumulator 8 to the oil pipe line of cylinder body；Described compress energy storage device 4 is connected by oil pipe line with described high pressure accumulator 8, and the oil pipe line between described compress energy storage device 4 and described high pressure accumulator 8 is additionally provided with startup valve 23；Described high-pressure oil passage 25 is connected to a load accumulator 24, leads to a road and be connected with described compress energy storage device 4 after described air relief valve 22；Described injection system is high-pressure co-rail electric-controlling injection system.

The end of electromotor is provided with hydraulic pressure sacculus 27, the pressure oil of the certain pressure being previously implanted it is full of in hydraulic pressure sacculus 27, it is connected with low pressure accumulator 18 by oil pipe line bottom it, when load pressure reduces suddenly or distributive value overshoot causes that piston crosses the second hydraulic fluid port 6 with bigger speed, hydraulic pressure sacculus 27 can play good cushioning effect, and substantially without producing rebound effect；Simultaneously in order to prevent hydraulic pressure sacculus 27 overpressure failure, spring loaded safety valve 28 it is additionally provided with between hydraulic pressure sacculus 27 and low pressure accumulator 18, once hydraulic pressure sacculus 27 superpressure spring loaded safety valve 28 will automatically open up, and by low pressure accumulator 18 compensator or trimmer pressure, at this moment the hydraulic system of electromotor can be played certain supplementary function by hydraulic pressure sacculus 27.The upper left side of described hydraulic pressure sacculus 27 is provided with the dead band hydraulic fluid port 34 of inclination, its place straight line is tangent with hydraulic pressure sacculus 27, dead band hydraulic fluid port 34 is connected by the dead band return electromagnetic valve 35 being arranged between with compress energy storage device 4, in operating mode of catching fire, when the end of piston component is in the dead band B between the second hydraulic fluid port 6 and hydraulic pressure sacculus 27, by opening ideally stop region A that dead band return electromagnetic valve 35 makes piston component return between the second hydraulic fluid port 6 and the first hydraulic fluid port 5 to start next stroke.

The effect of high pressure accumulator 8 is in that: one has been to ensure that when electromotor is shut down, and piston component can rest on bottom dead center position, reduces and wriggles；When two is under engine start operating mode and situation of catching fire occurs, promote piston component to be returned to bottom dead center position, enable the engine to continue to start next one circulation.

This electromotor also includes position detecting system, described position detecting system arrives signal when top dead center position, bottom dead center position and feed forward position by Linear displacement transducer and location triggered sensor detection piston component, feed forward position is the side of close top dead center position between top dead center position and bottom dead center position, controlling the closedown of the first control valve 3 during for start operating performance piston compression stroke, feed forward position detects system according to the velocity amplitude cooperation position of piston and determines.

Described injection system includes high-pressure oil pump 31, common rail pipe 32, electric-controlled fuel injector 33, pressure transducer and electronic control unit, during electromotor work, under the effect of oil transfer pump 29, fuel oil enters high-pressure oil pump 31 through cleaner 30, after the compression of high-pressure oil pump 31, low pressure oil becomes hydraulic oil, and inputted common rail pipe 32 by high-pressure oil pump 31, in common rail pipe 32, electronic control unit receives the feedback of pressure transducer and controls pressure limiting valve, with force value in buffer rail and make it keep constant, subsequently by relatively stable and have in the hydraulic oil input electric-controlled fuel injector 33 of certain pressure, wait the oil spout instruction of electronic control unit.

This electromotor is additionally provided with constant-voltage driving system, and described constant-voltage driving system mainly includes electromotor and hydraulic variable motor, by motor drive power square and load resistance square, maintains the constant of output oil liquid pressure.Hydraulic variable motor is driven by exporting high-voltage oil liquid, and is coupled with load by deceleration device, and its discharge capacity is automatically adjusted with the change of operating pressure.Hydraulic variable motor is connected with load machinery, and both rotating speeds are equal；In steady operation situation, motor drive power square is equal in magnitude with load resistance square, in opposite direction, and when resistance becomes big, motor drive power square, less than load resistance square, makes motor rotary speed reduce.Owing to the flow of output hydraulic pressure oil is constant, output hydraulic pressure oil flow resistance when back pressure increases increases, thus causing the rising of pressure in system.Now, the stroking mechanism of hydraulic motor receives this pressure and raises the feedback of signal and be adjusted, and makes self discharge capacity increase, increases the flow of motor when rotating speed reduces, thus reducing fluid flow resistance, maintain the constant of electromotor output oil liquid pressure.Simultaneously as discharge capacity increases, motor drive power square also increases therewith, and balances each other with load resistance square gradually, and system realizes reaching steady-working state again.Equally, when load resistance reduces, when fluid motor-driven moment is more than load resistance square, motor rotary speed raises, and causes the reduction of pressure in hydraulic system.Now, hydraulic variable motor discharge capacity regulates to the direction reduced, and makes driving moment and load resistance square balance each other, realize system stability work be maintained with in system pressure constant.

Start control system, for the control of engine start operating mode: after starting signal sends, be on valve 23 and air relief valve 22, compress energy storage device 4 is owing to connecting with high pressure accumulator 8 and pressure rising, and the compression ratio of electromotor is improved；The signal of displacement transducer is detected by control unit of engine, if testing result display piston component is in lower dead center, then control valve 3 by first and the second control valve 2 is opened, piston component is under the effect of compress energy storage device 4, start compression travel, if be detected that piston component is not in lower dead center, it is first turned on back level control valve 17, hydraulic oil in pump chamber 7 and compression chamber 1 is released by low pressure oil way 26, piston component is made to be returned to bottom dead center position under the effect of high pressure accumulator 8 pressure, close back level control valve 17, then start compression travel；When the speed of piston is decreased to a certain setting value, think that it arrives feed forward position, now control valve 2 by second to close, when piston arrives after top dead center, first controls valve 3 closes, and returns level control valve 17 and opens, and this valve 3 and second that controls first controls the control mode that valve 2 substep is closed, both ensure that the speed of compression travel, reduce again the resistance of expansion stroke；Piston component comes back to after bottom dead center, close back level control valve 17, piston component completes a cycle of operation, this process records the pressure and temperature value that piston component arrives during top dead centre in cylinder, when the second control valve 2 start signal sends again, judge whether cylinder pressure and the temperature of a upper cycle index meet diesel-fuel ignition condition, if in-cylinder pressure and temperature are all relatively low, then repeat above-described work process, after meeting ignition condition until pressure and temperature, initially enter the control process of normal operation.

Normal operation controls system, control for electromotor nominal situation: after entering nominal situation, close and start valve 23 and air relief valve 22, first controls valve 3 maintains a normally open state, after starting signal sends, second controls valve 2 opens, hydraulic oil in compress energy storage device 4 first passes through the second control valve 2 and enters compression chamber 1, piston component is promoted to move to top dead centre, after the first hydraulic fluid port 5 is opened, second controls valve 2 closes, connected by the first hydraulic fluid port 5 between compression chamber 1 and compress energy storage device 4, when piston component arrives oil spout position, trigger sensor, produce fuel injection signal, and control distributive value and make the ratio of compression time and the Bulking Time ratio equal to the volume change of two strokes of hydraulic pump, so that it is of substantially equal with compression flow to expand flow, to reduce the pulsation of electromotor output flow, fuel injection process is completed by injection system, at near top dead center, fuel combustion heat release, piston component returns to lower dead center under the effect of cylinder pressure, and control before valve 2 is again turned on stable in lower dead center second.

Fire controll system, control for engine fire operating mode: in engine working process, after starting signal sends, all piston component position is carried out one-time detection, if engine frequencies and frequency change rate are respectively less than setting value, then detect the position of piston component, if piston component is not at bottom dead center position, and cylinder temperature cylinder pressure is less than value of catching fire, then think that electromotor catches fire in a upper circulation, now it is first shut off the first control valve 3, and open air relief valve 22 and return level control valve 17, piston component is made to be returned to bottom dead center position, then the first control valve 3 is opened, wait next start dialing signal, electromotor moves according still further to normal operating cycle.

Described second controls valve 2 adopts maximum stream flow to be 250L/min, opens the high-frequency electrohydraulic servo valve that pulsewidth is 10ms, electrohydraulic servo valve is that one accepts analog quantity electric control signal, export the hydraulic control valve with electric control signal size and change in polarity and quickly response, there is quick dynamic response and good static characteristic, as: resolution ring high, stagnant is little, the linearity is good.Second maximum stream flow controlling valve 2, when to use maximum stream flow be 250L/min, opens pulsewidth be the electrohydraulic servo valve of 10ms time, the acceleration segment length of piston component can increase to about original 5 times, time used by compression travel is obviously reduced, so that the period of motion reduces 7ms nearly than originally, improve the maximum operation frequency of electromotor significantly, achieve beyond thought effect.

Embodiment 2: one new and effective transformer station attending device as Figure 1-3, including transformer station's maintenance cart and the electromotor that is connected with transformer station maintenance cart, electromotor is used for driving transformer station's maintenance cart, and electromotor includes power section, injection system and hydraulic part, described power section includes breather check valve 9, power piston 10, combustor 11, fuel injector 12, scavenging port 13, resetting piston 15, compression piston 19, hydraulic part includes compression chamber 1, pump chamber 7, return chamber 14 and hydraulic circuit, described compression chamber 1 is arranged at the rear portion of electromotor, is provided with the first hydraulic fluid port 5 thereon, second hydraulic fluid port 6, described first hydraulic fluid port 5, second hydraulic fluid port 6 controls valve 3 respectively through first and is connected with compress energy storage device 4 with the second control valve 2, described pump chamber 7 is connected with low pressure oil way 26 and high-pressure oil passage 25 respectively by check valve 9, high-pressure oil passage 25 is used for engine loading fuel feeding, being provided with back level control valve 17 and low pressure accumulator 18 on low pressure oil way 26, on time level control valve 17, also bypass is provided with return check valve 21；Described return chamber 14 is directly connected to high pressure accumulator 8, is provided with air relief valve 22 on described high pressure accumulator 8 to the oil pipe line of cylinder body；Described compress energy storage device 4 is connected by oil pipe line with described high pressure accumulator 8, and the oil pipe line between described compress energy storage device 4 and described high pressure accumulator 8 is additionally provided with startup valve 23；Described high-pressure oil passage 25 is connected to a load accumulator 24, leads to a road and be connected with described compress energy storage device 4 after described air relief valve 22；Described injection system is high-pressure co-rail electric-controlling injection system.

Described second controls valve 2 adopts maximum stream flow to be 200L/min, opens the high-frequency electrohydraulic servo valve that pulsewidth is 15ms, electrohydraulic servo valve is that one accepts analog quantity electric control signal, export the hydraulic control valve with electric control signal size and change in polarity and quickly response, there is quick dynamic response and good static characteristic, as: resolution ring high, stagnant is little, the linearity is good.Second maximum stream flow controlling valve 2, when to use maximum stream flow be 200L/min, opens pulsewidth be the electrohydraulic servo valve of 15ms time, the acceleration segment length of piston component can increase to about original 6 times, time used by compression travel is obviously reduced, so that the period of motion reduces 10ms nearly than originally, improve the maximum operation frequency of electromotor significantly, achieve beyond thought effect.

Embodiment 3: one new and effective transformer station attending device as Figure 1-3, including transformer station's maintenance cart and the electromotor that is connected with transformer station maintenance cart, electromotor is used for driving transformer station's maintenance cart, and electromotor includes power section, injection system and hydraulic part, described power section includes breather check valve 9, power piston 10, combustor 11, fuel injector 12, scavenging port 13, resetting piston 15, compression piston 19, hydraulic part includes compression chamber 1, pump chamber 7, return chamber 14 and hydraulic circuit, described compression chamber 1 is arranged at the rear portion of electromotor, is provided with the first hydraulic fluid port 5 thereon, second hydraulic fluid port 6, described first hydraulic fluid port 5, second hydraulic fluid port 6 controls valve 3 respectively through first and is connected with compress energy storage device 4 with the second control valve 2, described pump chamber 7 is connected with low pressure oil way 26 and high-pressure oil passage 25 respectively by check valve 9, high-pressure oil passage 25 is used for engine loading fuel feeding, being provided with back level control valve 17 and low pressure accumulator 18 on low pressure oil way 26, on time level control valve 17, also bypass is provided with return check valve 21；Described return chamber 14 is directly connected to high pressure accumulator 8, is provided with air relief valve 22 on described high pressure accumulator 8 to the oil pipe line of cylinder body；Described compress energy storage device 4 is connected by oil pipe line with described high pressure accumulator 8, and the oil pipe line between described compress energy storage device 4 and described high pressure accumulator 8 is additionally provided with startup valve 23；Described high-pressure oil passage 25 is connected to a load accumulator 24, leads to a road and be connected with described compress energy storage device 4 after described air relief valve 22；Described injection system is high-pressure co-rail electric-controlling injection system.

Described second controls valve 2 adopts maximum stream flow to be 220L/min, opens the high-frequency electrohydraulic servo valve that pulsewidth is 20ms, electrohydraulic servo valve is that one accepts analog quantity electric control signal, export the hydraulic control valve with electric control signal size and change in polarity and quickly response, there is quick dynamic response and good static characteristic, as: resolution ring high, stagnant is little, the linearity is good.Second maximum stream flow controlling valve 2, when to use maximum stream flow be 220L/min, opens pulsewidth be the electrohydraulic servo valve of 20ms time, the acceleration segment length of piston component can increase to about original 7 times, time used by compression travel is obviously reduced, so that the period of motion reduces 12ms nearly than originally, improve the maximum operation frequency of electromotor significantly, achieve beyond thought effect.

Embodiment 4: one new and effective transformer station attending device as Figure 1-3, including transformer station's maintenance cart and the electromotor that is connected with transformer station maintenance cart, electromotor is used for driving transformer station's maintenance cart, and electromotor includes power section, injection system and hydraulic part, described power section includes breather check valve 9, power piston 10, combustor 11, fuel injector 12, scavenging port 13, resetting piston 15, compression piston 19, hydraulic part includes compression chamber 1, pump chamber 7, return chamber 14 and hydraulic circuit, described compression chamber 1 is arranged at the rear portion of electromotor, is provided with the first hydraulic fluid port 5 thereon, second hydraulic fluid port 6, described first hydraulic fluid port 5, second hydraulic fluid port 6 controls valve 3 respectively through first and is connected with compress energy storage device 4 with the second control valve 2, described pump chamber 7 is connected with low pressure oil way 26 and high-pressure oil passage 25 respectively by check valve 9, high-pressure oil passage 25 is used for engine loading fuel feeding, being provided with back level control valve 17 and low pressure accumulator 18 on low pressure oil way 26, on time level control valve 17, also bypass is provided with return check valve 21；Described return chamber 14 is directly connected to high pressure accumulator 8, is provided with air relief valve 22 on described high pressure accumulator 8 to the oil pipe line of cylinder body；Described compress energy storage device 4 is connected by oil pipe line with described high pressure accumulator 8, and the oil pipe line between described compress energy storage device 4 and described high pressure accumulator 8 is additionally provided with startup valve 23；Described high-pressure oil passage 25 is connected to a load accumulator 24, leads to a road and be connected with described compress energy storage device 4 after described air relief valve 22；Described injection system is high-pressure co-rail electric-controlling injection system.

Described second controls valve 2 adopts maximum stream flow to be 270L/min, opens the high-frequency electrohydraulic servo valve that pulsewidth is 25ms, electrohydraulic servo valve is that one accepts analog quantity electric control signal, export the hydraulic control valve with electric control signal size and change in polarity and quickly response, there is quick dynamic response and good static characteristic, as: resolution ring high, stagnant is little, the linearity is good.Second maximum stream flow controlling valve 2, when to use maximum stream flow be 270L/min, opens pulsewidth be the electrohydraulic servo valve of 25ms time, the acceleration segment length of piston component can increase to about original 7.5 times, time used by compression travel is obviously reduced, so that the period of motion reduces 12ms nearly than originally, improve the maximum operation frequency of electromotor significantly, achieve beyond thought effect.

Embodiment 5: one new and effective transformer station attending device as Figure 1-3, including transformer station's maintenance cart and the electromotor that is connected with transformer station maintenance cart, electromotor is used for driving transformer station's maintenance cart, and electromotor includes power section, injection system and hydraulic part, described power section includes breather check valve 9, power piston 10, combustor 11, fuel injector 12, scavenging port 13, resetting piston 15, compression piston 19, hydraulic part includes compression chamber 1, pump chamber 7, return chamber 14 and hydraulic circuit, described compression chamber 1 is arranged at the rear portion of electromotor, is provided with the first hydraulic fluid port 5 thereon, second hydraulic fluid port 6, described first hydraulic fluid port 5, second hydraulic fluid port 6 controls valve 3 respectively through first and is connected with compress energy storage device 4 with the second control valve 2, described pump chamber 7 is connected with low pressure oil way 26 and high-pressure oil passage 25 respectively by check valve 9, high-pressure oil passage 25 is used for engine loading fuel feeding, being provided with back level control valve 17 and low pressure accumulator 18 on low pressure oil way 26, on time level control valve 17, also bypass is provided with return check valve 21；Described return chamber 14 is directly connected to high pressure accumulator 8, is provided with air relief valve 22 on described high pressure accumulator 8 to the oil pipe line of cylinder body；Described compress energy storage device 4 is connected by oil pipe line with described high pressure accumulator 8, and the oil pipe line between described compress energy storage device 4 and described high pressure accumulator 8 is additionally provided with startup valve 23；Described high-pressure oil passage 25 is connected to a load accumulator 24, leads to a road and be connected with described compress energy storage device 4 after described air relief valve 22；Described injection system is high-pressure co-rail electric-controlling injection system.

Described second controls valve 2 adopts maximum stream flow to be 230L/min, opens the high-frequency electrohydraulic servo valve that pulsewidth is 30ms, electrohydraulic servo valve is that one accepts analog quantity electric control signal, export the hydraulic control valve with electric control signal size and change in polarity and quickly response, there is quick dynamic response and good static characteristic, as: resolution ring high, stagnant is little, the linearity is good.Second maximum stream flow controlling valve 2, when to use maximum stream flow be 230L/min, opens pulsewidth be the electrohydraulic servo valve of 30ms time, the acceleration segment length of piston component can increase to about original 8 times, time used by compression travel is obviously reduced, so that the period of motion reduces 14ms nearly than originally, improve the maximum operation frequency of electromotor significantly, achieve beyond thought effect.

Finally should be noted that; above example is only in order to illustrate technical scheme; but not limiting the scope of the invention; although having made to explain to the present invention with reference to preferred embodiment; it will be understood by those within the art that; technical scheme can be modified or equivalent replacement, without deviating from the spirit and scope of technical solution of the present invention.

Claims

1. a new and effective transformer station attending device, including transformer station's maintenance cart and the electromotor that is connected with transformer station maintenance cart, electromotor is used for driving transformer station's maintenance cart, it is characterized in that, electromotor includes power section, injection system and hydraulic part, described power section includes breather check valve, power piston, combustor, fuel injector, scavenging port, hydraulic part includes compression chamber, pump chamber, return chamber and hydraulic circuit, described compression chamber is arranged at the rear portion of electromotor, it is provided with the first hydraulic fluid port thereon, second hydraulic fluid port, described first hydraulic fluid port, second hydraulic fluid port controls valve respectively through first and the second control valve is connected with compress energy storage device, described pump chamber is connected with low pressure oil way and high-pressure oil passage respectively by check valve, high-pressure oil passage is used for engine loading fuel feeding, low pressure oil way is provided with back level control valve and low pressure accumulator, return bypass on level control valve and be provided with return check valve；Described return chamber and high pressure accumulator are directly connected to, and are provided with air relief valve on described high pressure accumulator to the oil pipe line of cylinder body, state of starting operating and catch fire operating mode time air relief valve be held open, during nominal situation, air relief valve cuts out；Described compress energy storage device is connected by oil pipe line with high pressure accumulator, and is provided with startup valve on the oil pipe line between described compress energy storage device and high pressure accumulator, improves the compression ratio of electromotor during for start operating performance, starts valve and close during nominal situation；Described high-pressure oil passage is connected to a load accumulator, leads to a road and be connected with described compress energy storage device after air relief valve；The end of electromotor is provided with hydraulic pressure sacculus, is full of the pressure oil being previously implanted in hydraulic pressure sacculus, is connected with low pressure accumulator by oil pipe line, is additionally provided with spring loaded safety valve between hydraulic pressure sacculus and low pressure accumulator bottom it；The upper left side of described hydraulic pressure sacculus is provided with the dead band hydraulic fluid port of inclination, its place straight line is tangent with hydraulic pressure sacculus, dead band hydraulic fluid port is connected by the dead band return electromagnetic valve being arranged between with compress energy storage device, in operating mode of catching fire, when the end of piston component is in the dead zone location between the second hydraulic fluid port and hydraulic pressure sacculus, by opening ideally stop region that dead band return electromagnetic valve makes piston component return between the second hydraulic fluid port and the first hydraulic fluid port to start next stroke；Described injection system is high-pressure co-rail electric-controlling injection system, including high-pressure oil pump, common rail pipe, electric-controlled fuel injector, pressure transducer and electronic control unit, during electromotor work, under the effect of oil transfer pump, fuel oil enters high-pressure oil pump through cleaner, after the compression of high-pressure oil pump, low pressure oil becomes hydraulic oil, and inputted common rail pipe by high-pressure oil pump, in common rail pipe, electronic control unit receives the feedback of pressure transducer and controls pressure limiting valve, with force value in buffer rail and make it keep constant, subsequently hydraulic oil is inputted in electric-controlled fuel injector, wait the oil spout instruction of electronic control unit；

Described electromotor also includes normal operation and controls system and fire controll system:

Fire controll system, control for engine fire operating mode: in engine working process, after starting signal sends, all piston component position is carried out one-time detection, if engine frequencies and frequency change rate are respectively less than setting value, then detect the position of piston component, if piston component is not at bottom dead center position, and cylinder temperature cylinder pressure is less than value of catching fire, then think that electromotor catches fire in a upper circulation, now it is first shut off the first control valve, and open air relief valve and return level control valve, piston component is made to be returned to bottom dead center position, then first controls valve unlatching, wait next start dialing signal, electromotor moves according still further to normal operating cycle；

Described second controls the high-frequency electrohydraulic servo valve that valve adopts maximum stream flow to be 250L/min, and it opens pulsewidth is 10ms.

2. one according to claim 1 new and effective transformer station attending device, it is characterized in that, also include start control system, control for engine start operating mode: after starting signal sends, it is on valve and air relief valve, compress energy storage device is owing to connecting with high pressure accumulator and pressure rising, and the compression ratio of electromotor is improved；The signal of displacement transducer is detected by control unit of engine, if testing result display piston component is in lower dead center, then control valve by first and the second control valve is opened, piston component is under the effect of compress energy storage device, start compression travel, if be detected that piston component is not in lower dead center, it is first turned on back level control valve, hydraulic oil in pump chamber and compression chamber is released by low pressure oil way, piston component is made to be returned to bottom dead center position under the effect of high pressure accumulator pressure, close back level control valve, then start compression travel；When piston arrives feed forward position, second controls valve closes, when piston arrives after top dead center, first controls valve closes, return level control valve to open, piston component comes back to after bottom dead center, close back level control valve, piston component completes a cycle of operation, this process records the pressure and temperature value that piston component arrives during top dead centre in cylinder, when frequency valve start signal sends again, judge whether cylinder pressure and the temperature of a upper cycle index meet diesel-fuel ignition condition, if in-cylinder pressure and temperature are unsatisfactory for ignition condition, then repeat above-described work process, after meeting ignition condition until pressure and temperature, initially enter the control process of normal operation.