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CN103742490B - Mixed power pumping unit - Google Patents

Mixed power pumping unit Download PDF

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Publication number
CN103742490B
CN103742490B CN201410037526.7A CN201410037526A CN103742490B CN 103742490 B CN103742490 B CN 103742490B CN 201410037526 A CN201410037526 A CN 201410037526A CN 103742490 B CN103742490 B CN 103742490B
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China
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selector valve
port
hydraulic tubing
accumulator
hydraulic
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CN201410037526.7A
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CN103742490A (en
Inventor
曾小华
彭宇君
李相华
宋大凤
李胜
杨南南
王鹏宇
王广义
杨顺
李高志
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Jilin University
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Jilin University
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Abstract

The invention discloses a kind of mixed power pumping unit, comprise accumulator, pressure transducer, accumulator selector valve, one-way valve, hydraulic pump/motor, first coupling, dynamic coupling device, discharge opeing selector valve, motor, second coupling, first clutch, 3rd coupling, second clutch, pumping unit main body, pilot operated compound relief valve, oil storage tank, control unit, first hydraulic tubing, second hydraulic tubing, 3rd hydraulic tubing, 4th hydraulic tubing, 5th hydraulic tubing, 6th hydraulic tubing, 7th hydraulic tubing, 8th hydraulic tubing and the 9th hydraulic tubing, the present invention, on the basis not changing traditional beam pumping unit main body, only transforms prime mover portion, and its Design and manufacture cost is low, structure of the present invention is simple, has good versatility, can reequip, thus can make full use of the pumping unit main body of active service on numerous conventional oil-pump base.

Description

Mixed power pumping unit
Technical field
The present invention relates to a kind of crude oil and extract machinery, particularly a kind of mixed power pumping unit.
Background technique
After petroleum production to a certain extent in oil field, the pressure of oil reservoir is reduced to and is not enough to make oil well blowing, at this moment namely needs to adopt machine instruction statement mining.At present, China is widely used is conventional beam pumping unit.Conventional beam pumping unit usually adopt motor as prime mover, gear reducer as driving mechanism, crank balance mechanism as actuator.This Pumping Unit is simple, durable, maintenance cost is low, easy to operate.But, on the one hand, electric motor starting torque in conventional beam pumping unit is generally about 150% of full-load torque, in addition, considering the impulsive load in pumping unit working procedure, generally needing when choosing motor to choose the larger motor of power, so just cause the Rate of average load of pumping unit motor to be in the course of the work only 20%-30%, make motor long-term work in the region of poor efficiency, add the energy consumption of pumping unit.On the other hand, when pumping unit is in down stroke, oil well pump moves downward under gravity, oil well pump at this moment can be made to drag motor by driving mechanism is counter, cause machine operation at generating state.But this part of electricity can not fully be absorbed by electrical network usually, not only causes the waste of gravitational potential energy, also can be polluted electrical network by a part of electric energy that electrical network absorbs in addition.
Now, for improve pumping unit efficiency, reduce its energy consumption, domesticly proposed some patents, if existing Chinese patent publication No. is CN102817593A, date of publication is on December 12nd, 2012, and denomination of invention is " swing link type non-beam beam-pumping unit ", and patent is by arranging head sheave and band rope, substituted for horse head, walking beam and connecting rod, make the structure of pumping unit simple, manufacture cost is few, and its works is few, power consumption is few, and mechanical efficiency is high.Chinese patent publication No. is CN102913199A, date of publication is on February 6th, 2013, denomination of invention is " a kind of pumping unit ", it is connected with crank by head sheave, reduce the stressed of connecting rod and crank, resulting torque peak value on crankshaft is declined, reduction of fluctuating, can low-power machine be adopted, effectively reduce the energy loss of motor.China Patent Publication No. is CN101016832A, publication date is on August 15th, 2007, denomination of invention is " loose-leaf directly pulling oil pumping unit ", it is without the need to crank, connecting rod and other conversion equipments, adopt trap reducing gear to utilize hydraulic program system to realize the to-and-fro motion of pumping unit, there is the simple low cost of manufacture of structure, energy-efficient feature.Chinese patent Authorization Notice No. is CN2573667Y, publication date is on September 17th, 2003, denomination of invention is " hydraulic single-cylinder cluster multi-well interactive self-balance pumping unit ", it drives oil pump by speed-adjustable motor, drives the sucker rod of many mouthfuls of wells to pump realize oil pumping operation by the cylinder rod on each well head.Chinese patent publication No. is CN102828729A, date of publication is on December 19th, 2012, denomination of invention is " a kind of automatic hydraulic beam-pumping unit ", it adopts truss structure vertical derrick, speedup sheave block, steel cable flexible transmission, the volume that perpetual motion rate variable displacement pump and quantitative hydraulic oil cylinder form slows down, and load feedback speed control system.Well hangs gravity complete equilibrium counterweight and 1/3 load counterweight, and upper and lower stop arranges spring energy storage device, has efficient and full automatic feature.Chinese patent Authorization Notice No. is CN202866763U, notice of authorization is everyday on April 10th, 2013, denomination of invention is " power unit of hydraulic pumping unit and comprise the hydraulic pumping unit of this power unit ", it adopts at least one first Secondary Regulation Technology oil hydraulic motor motor-driven and at least one second Secondary Regulation Technology oil hydraulic motor, drive corresponding underwell pump sucker rod to move back and forth respectively and realize oil pumping operation, this invention reduces the loss of electric machine, reduces cost.
Although the pumping unit proposed in above-mentioned patent can play the object reducing energy consumption, compared with the beam pumping unit of traditional routine, structural modification is comparatively large, and what have is even brand-new organization plan.Such one side makes the design cost of pumping unit and cycle increase; Substitute on the other hand the beam pumping unit of active service according to the pumping unit described in above-mentioned patent, the cost of the replacing of pumping unit is high, is difficult to promote in a short time, and replace active service, available pumping unit can cause serious waste to existing resource undoubtedly.
Summary of the invention
The invention provides a kind of mixed power pumping unit, its object is to solve the low and New Power Saving Pumping Unit design of conventional beam pumping unit efficiency, manufacture cost is high, the cycle is long, do not make full use of the pumping unit of active service and cause the problem of the wasting of resources.
The present invention includes accumulator 1, pressure transducer 2, accumulator selector valve 3, one-way valve 4, hydraulic pump/motor 5, first coupling 6, dynamic coupling device 8, discharge opeing selector valve 9, motor 10, second coupling 11, first clutch 13, 3rd coupling 15, second clutch 17, pumping unit main body 19, pilot operated compound relief valve 20, oil storage tank 21, control unit 22, first hydraulic tubing P1, second hydraulic tubing P2, 3rd hydraulic tubing P3, 4th hydraulic tubing P4, 5th hydraulic tubing P5, 6th hydraulic tubing P6, 7th hydraulic tubing P7, 8th hydraulic tubing P8 and the 9th hydraulic tubing P9,
The output shaft of described motor 10 is fixedly connected with first clutch input shaft 12 by the second coupling 11; Driven disc and the first clutch driven shaft 14 of first clutch 13 pass through spline joint; First clutch driven shaft 14 is fixedly connected with second clutch input shaft 16 by the 3rd coupling 15; Driven disc and the second clutch driven shaft 18 of second clutch 17 pass through spline joint; First dynamic coupling device axle 7 is connected with hydraulic pump/motor 5 output shaft by the first coupling 6;
The AC motor that described motor 10 is commonly used for pumping unit field;
Described first clutch 13 and second clutch 17 are hydraulic type automatic clutch conventional inside mechanical field;
Described hydraulic pump/motor 5 is a cam-type axial piston hydraulic pump/motor, and it is hydraulic secondary component, both can be operated in pump pattern and also can be operated in motoring mode;
Described dynamic coupling device 8 is a gear-box, it forms primarily of a pair pitch wheel, the first dynamic coupling device axle 7, second dynamic coupling device axle and dynamic coupling device housing, and wherein two gears are connected with the second dynamic coupling device axle with the first dynamic coupling device axle respectively by spline;
Described pumping unit main body 19 removes the part of prime mover for beam pumping unit;
Described accumulator selector valve 3 is three-position four-way valves, and the connection of its each port is as follows: the first port 31 of accumulator selector valve 3 is connected with oil storage tank 21 by the second hydraulic tubing P2; Second port 32 of accumulator selector valve 3 is connected with accumulator 1 by the first hydraulic tubing P1; 3rd port 33 of accumulator selector valve 3 is connected with the first port 201 of pilot operated compound relief valve 20 with the 4th hydraulic tubing P4 by the 3rd hydraulic tubing P3, and the 3rd port 33 of accumulator selector valve 3 is also connected with the first port 50 of hydraulic pump/motor 5 with the 5th hydraulic tubing P5 by the 3rd hydraulic tubing P3 simultaneously; 4th port 34 of accumulator selector valve 3 is connected with the second port 51 of hydraulic pump/motor 5 by the 6th hydraulic tubing P6; Accumulator selector valve 3 has: primary importance I, in this position, first port 31 of accumulator selector valve 3 is connected to the 4th port 34 of the accumulator selector valve 3 of accumulator selector valve 3, and the second port 32 of accumulator selector valve 3 is connected to the 3rd port 33 of accumulator selector valve 3; Second place II, is connected with the 3rd port 33 of accumulator selector valve 3 and the 4th port 34 of accumulator selector valve 3 at the first port 31 of this position accumulator selector valve 3 simultaneously, and the second port 32 of accumulator selector valve 3 is closed; 3rd position III, the first port 31 of accumulator selector valve 3 is connected with the 3rd port 33 of accumulator selector valve 3, and the second port 32 of accumulator selector valve 3 is connected with the 4th port 34 of accumulator selector valve 3; Accumulator selector valve 3 is solenoid valves, and its valve core movement is controlled to primary importance I and the 3rd position III by solenoid, and spool returns second place II by Returnning spring;
Described one-way valve 4 is plugged on the 3rd hydraulic tubing P3, and allows fluid only can flow towards accumulator selector valve 3; 3rd hydraulic tubing P3, the 4th hydraulic tubing P4 are connected at node N1 place with the 5th hydraulic tubing P5;
Described pressure transducer 2 is connected on the first hydraulic tubing P1;
Described discharge opeing selector valve 9 is two position two-way valves, and the connection of its each port is as follows: discharge opeing selector valve 9 first port 91 is connected with the remote control orifice 203 of pilot operated compound relief valve 20 by the 8th hydraulic tubing P8; Second port 92 of discharge opeing selector valve 9 is connected with oil storage tank 21 by the 9th hydraulic tubing P9; Discharge opeing selector valve 9 has: primary importance I, is connected with the second port 92 of discharge opeing selector valve 9 at the first port 91 of this position discharge opeing selector valve 9; Second place II, in this position, the first port 91 of discharge opeing selector valve 9 all seals with the second port 92 of discharge opeing selector valve 9; Discharge opeing selector valve 9 is solenoid valves, and its valve core movement is controlled to primary importance I by solenoid, and spool returns second place II by Returnning spring;
Second port 202 of described pilot operated compound relief valve 20 is connected with oil storage tank 21 by the 7th hydraulic tubing P7, and its pilot pressure is demarcated as the threshold value of a setting, and this threshold value is the pressure maximum allowed when working of accumulator 1;
When the remote control orifice 203 of described pilot operated compound relief valve 20 is connected by discharge opeing selector valve 9 and oil storage tank 21, its main valve plug just can be opened under very little action of hydraulic force, realizes overflow, makes hydraulic pump/motor 5 off-load.
Working procedure of the present invention and principle are:
The operating mode that described control unit 22 is current according to pumping unit, controls the working state of accumulator selector valve 3, discharge opeing selector valve 9, hydraulic pump/motor 5 and motor 10, pressure transducer 2 be connected to control unit 22.According to the function that described mixed power pumping unit realizes, this system can be divided into following several pattern:
Accumulator priming mode, when the present invention opens, control unit 22 detects the pressure in accumulator 1 by pressure transducer 2, and when the pressure in accumulator 1 is less than default preacceleration inflation force value, the present invention enters accumulator priming mode.In this mode, under the control of control unit 22, first clutch 13 engages, and second clutch 17 is separated; Accumulator selector valve 3 is in primary importance I place, and discharge opeing selector valve 9 is in second place II.Motor 10 is operated in drive pattern, and motor 10 drives hydraulic pump/motor 5 by the second coupling 11, first clutch input shaft 12, first clutch 13, first clutch driven shaft 14, dynamic coupling device 8, first dynamic coupling device axle 7 and the first coupling 6 successively; At this moment hydraulic pump/motor 5 is operated in pump pattern, hydraulic oil is extracted out by the second hydraulic tubing P2 by hydraulic pump/motor 5 from oil storage tank 21, hydraulic pump/motor 5 is arrived after accumulator selector valve 3 and the 6th hydraulic tubing P6, afterwards under the effect of hydraulic pump/motor 5, fluid is filled with in accumulator 1 through the 5th hydraulic tubing P5, one-way valve 4, the 3rd hydraulic tubing P3, accumulator selector valve 3.When the working pressure in accumulator 1 reaches the pressure maximum that it allows, the hydraulic oil of discharging from hydraulic pump/motor 5 pump is through pilot operated compound relief valve 20 overflow after the 5th hydraulic tubing P5, the 4th hydraulic tubing P4, and hydraulic oil flows in oil storage tank 21 through the 7th hydraulic tubing P7 afterwards.After pilot operated compound relief valve 20 starts overflow, control unit 22 controls discharge opeing selector valve 9 and is switched to primary importance I, at this moment, the hydraulic oil of discharging from hydraulic pump/motor 5 pump is drained into oil storage tank 21 after the 5th hydraulic tubing P5, the 4th hydraulic tubing P4, the 8th hydraulic tubing P8, discharge opeing selector valve 9 and the 9th hydraulic tubing P9, realizes the off-load that accumulator preliminary filling terminates rear hydraulic pump/motor 5.
Accumulator fills can pattern, and when the present invention is in down stroke, control unit 22 detects the pressure in accumulator 1 by pressure transducer 2, and when the pressure in accumulator 1 is less than the maximum pressure value that it allows, the present invention enters that accumulator fills can pattern.In this mode, under the control of control unit 22, first clutch 13 is separated, and second clutch 17 combines; Accumulator selector valve 3 is in primary importance I place, and discharge opeing selector valve 9 is in second place II.Pumping unit main body 19 drives hydraulic pump/motor 5 by second clutch driven shaft 18, second clutch 17, second clutch input shaft 16, the defeated axle 14 of the 3rd coupling 15, second dynamic coupling device, dynamic coupling device 8, first dynamic coupling device axle 7 and the first coupling 6 successively; At this moment, motor 10 does not work, and hydraulic pump/motor 5 is operated in pump pattern.Hydraulic oil is extracted out by the second hydraulic tubing P2 by hydraulic pump/motor 5 from oil storage tank 21, hydraulic pump/motor 5 is arrived after accumulator selector valve 3 and the 6th hydraulic tubing P6, afterwards under the effect of hydraulic pump/motor 5, hydraulic oil is filled with in accumulator 1 through the 5th hydraulic tubing P5, one-way valve 4, the 3rd hydraulic tubing P3, accumulator selector valve 3.When the working pressure in accumulator 1 reaches the pressure maximum that it allows, the hydraulic oil of discharging from hydraulic pump/motor 5 pump is through pilot operated compound relief valve 20 overflow after the 5th hydraulic tubing P5, the 4th hydraulic tubing P4, and hydraulic oil flows in oil storage tank 21 through the 7th hydraulic tubing P7 afterwards.After pilot operated compound relief valve 20 starts overflow, control unit 22 controls discharge opeing selector valve 9 and is switched to primary importance I, at this moment, the hydraulic oil of discharging from hydraulic pump/motor 5 pump is drained into oil storage tank 21 after the 5th hydraulic tubing P5, the 4th hydraulic tubing P4, the 8th hydraulic tubing P8, discharge opeing selector valve 9 and the 9th hydraulic tubing P9, realizes the off-load of hydraulic pump/motor 5.
Hydraulic pump/motor assistant mode, when the present invention works, when the driving force that motor 10 can provide is less than the driving force driven needed for pumping unit main body 19, the present invention enters hydraulic pump/motor assistant mode.In this mode, under the control of control unit 22, first clutch 13 engages, and second clutch 17 combines; Accumulator selector valve 3 is in the 3rd III place, position, and discharge opeing selector valve 9 is in primary importance I, and hydraulic pump/motor 5 is operated in motoring mode.In this mode, control motor 10 and be operated in efficient district, the driving force that motor 10 is not enough to provide is supplemented by hydraulic pump/motor 5.On the one hand, motor 10 passes through the second coupling 11, first clutch input shaft 12, first clutch 13 and first clutch driven shaft 14 by transmission of power successively to dynamic coupling device 8; On the other hand, hydraulic pump/motor 5 simultaneously also by the first coupling 6 and the first dynamic coupling device axle 7 by transmission of power to dynamic coupling device 8.Power, after dynamic coupling device 8 is coupled, is delivered to pumping unit main body 19 through the second dynamic coupling device axle, the 3rd coupling 15, second clutch input shaft 16, second clutch 17, second clutch driven shaft 18, and then drives pumping unit main body 19.In this mode, the hydraulic oil in accumulator 1 enters hydraulic pump/motor 5 through the first hydraulic tubing P1, accumulator selector valve 3, the 6th hydraulic tubing P6, thus drives hydraulic pump/motor 5; Afterwards, the hydraulic oil of discharging from hydraulic pump/motor 5 pump is drained into oil storage tank 21 after the 5th hydraulic tubing P5, the 4th hydraulic tubing P4, the 8th hydraulic tubing P8, discharge opeing selector valve 9 and the 9th hydraulic tubing P9.
Pressure maintain pattern, when accumulator fill can complete and not need hydraulic pump/motor 5 power-assisted time, the present invention enter pressure maintain pattern.In this mode, under the control of control unit 22, first clutch 13 engages, and second clutch 17 combines; Accumulator selector valve 3 is in second place II place, and discharge opeing selector valve 9 is in primary importance I.At this moment hydraulic pump/motor 5 does not work.Motor 10 works independently, and drives pumping unit main body 19 to carry out oil pumping operation.Motor 10 is delivered to pumping unit main body 19 by the second coupling 11, first clutch input shaft 12, first clutch 13 and first clutch driven shaft 14, power through dynamic coupling device 8, second dynamic coupling device axle, the 3rd coupling 15, second clutch input shaft 16, second clutch 17, second clutch driven shaft 18 successively, and then drives pumping unit main body 19.Dynamic coupling device 8 also drives hydraulic pump/motor 5 to dally by the first dynamic coupling device axle 7, first coupling 6 simultaneously.Hydraulic oil is extracted out by the second hydraulic tubing P2 by hydraulic pump/motor 5 from oil storage tank 21, hydraulic pump/motor 5 is arrived after accumulator selector valve 3 and the 6th hydraulic tubing P6, afterwards under the effect of hydraulic pump/motor 5, hydraulic oil is drained into oil storage tank 21 after the 5th hydraulic tubing P5, the 4th hydraulic tubing P4, the 8th hydraulic tubing P8, discharge opeing selector valve 9 and the 9th hydraulic tubing P9, realizes the off-load of hydraulic pump/motor 5.
Described second clutch driven shaft 18 is pumping unit main body input shafts.
Described first clutch driven shaft 14 is second dynamic coupling device axles.
System of the present invention in different modes the position of corresponding valve and the state of clutch as shown in the table:
The invention has the beneficial effects as follows:
1. when the present invention starts, adopt hydraulic pump/motor to provide auxiliary driving force to assist electric motor starting pumping unit, thus more traditional pumping unit, the motor that rated power is less can be equipped with, thus the Rate of average load of motor in pumping unit working procedure is improved, effectively improve the efficiency of pumping unit;
2. the transform gravitational energy of oil well pump is that hydraulic energy is stored into inside accumulator by hydraulic pump/motor by the present invention in the down stroke of pumping unit, avoid on the one hand and instead in oil well pump down stroke process drag motor, shine into harmful effect to electrical network, also get up to enable this part energy to be fully utilized this part stored energy on the other hand;
3. the present invention is on the basis not changing traditional beam pumping unit main body, only transforms prime mover portion, and its Design and manufacture cost is low;
4. structure of the present invention is simple, has good versatility, can reequip, thus can make full use of the pumping unit main body of active service on numerous conventional oil-pump base.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Refer to shown in Fig. 1, for the embodiment of the present invention, comprise accumulator 1, pressure transducer 2, accumulator selector valve 3, one-way valve 4, hydraulic pump/motor 5, first coupling 6, dynamic coupling device 8, discharge opeing selector valve 9, motor 10, second coupling 11, first clutch 13, 3rd coupling 15, second clutch 17, pumping unit main body 19, pilot operated compound relief valve 20, oil storage tank 21, control unit 22, first hydraulic tubing P1, second hydraulic tubing P2, 3rd hydraulic tubing P3, 4th hydraulic tubing P4, 5th hydraulic tubing P5, 6th hydraulic tubing P6, 7th hydraulic tubing P7, 8th hydraulic tubing P8 and the 9th hydraulic tubing P9,
The output shaft of described motor 10 is fixedly connected with first clutch input shaft 12 by the second coupling 11; Driven disc and the first clutch driven shaft 14 of first clutch 13 pass through spline joint; First clutch driven shaft 14 is fixedly connected with second clutch input shaft 16 by the 3rd coupling 15; Driven disc and the second clutch driven shaft 18 of second clutch 17 pass through spline joint; First dynamic coupling device axle 7 is connected with hydraulic pump/motor 5 output shaft by the first coupling 6;
The AC motor that described motor 10 is commonly used for pumping unit field;
Described first clutch 13 and second clutch 17 are hydraulic type automatic clutch conventional inside mechanical field;
Described hydraulic pump/motor 5 is a cam-type axial piston hydraulic pump/motor, and it is hydraulic secondary component, both can be operated in pump pattern and also can be operated in motoring mode;
Described dynamic coupling device 8 is a gear-box, it forms primarily of a pair pitch wheel, the first dynamic coupling device axle, the second dynamic coupling device axle and dynamic coupling device housing, and wherein two gears are connected with the second dynamic coupling device axle with the first dynamic coupling device axle respectively by spline;
Described pumping unit main body 19 removes the part of prime mover for beam pumping unit;
Described accumulator selector valve 3 is three-position four-way valves, and the connection of its each port is as follows: the first port 31 of accumulator selector valve 3 is connected with oil storage tank 21 by the second hydraulic tubing P2; Second port 32 of accumulator selector valve 3 is connected with accumulator 1 by the first hydraulic tubing P1; 3rd port 33 of accumulator selector valve 3 is connected with the first port 201 of pilot operated compound relief valve 20 with the 4th hydraulic tubing P4 by the 3rd hydraulic tubing P3, and the 3rd port 33 of accumulator selector valve 3 is also connected with the first port 50 of hydraulic pump/motor 5 with the 5th hydraulic tubing P5 by the 3rd hydraulic tubing P3 simultaneously; 4th port 34 of accumulator selector valve 3 is connected with the second port 51 of hydraulic pump/motor 5 by the 6th hydraulic tubing P6; Accumulator selector valve 3 has: primary importance I, in this position, first port 31 of accumulator selector valve 3 is connected to the 4th port 34 of the accumulator selector valve 3 of accumulator selector valve 3, and the second port 32 of accumulator selector valve 3 is connected to the 3rd port 33 of accumulator selector valve 3; Second place II, is connected with the 3rd port 33 of accumulator selector valve 3 and the 4th port 34 of accumulator selector valve 3 at the first port 31 of this position accumulator selector valve 3 simultaneously, and the second port 32 of accumulator selector valve 3 is closed; 3rd position III, the first port 31 of accumulator selector valve 3 is connected with the 3rd port 33 of accumulator selector valve 3, and the second port 32 of accumulator selector valve 3 is connected with the 4th port 34 of accumulator selector valve 3; Accumulator selector valve 3 is solenoid valves, and its valve core movement is controlled to primary importance I and the 3rd position III by solenoid, and spool returns second place II by Returnning spring;
Described one-way valve 4 is plugged on the 3rd hydraulic tubing P3, and allows fluid only can flow towards accumulator selector valve 3; 3rd hydraulic tubing P3, the 4th hydraulic tubing P4 are connected at node N1 place with the 5th hydraulic tubing P5;
Described pressure transducer 2 is connected on the first hydraulic tubing P1;
Described discharge opeing selector valve 9 is two position two-way valves, and the connection of its each port is as follows: discharge opeing selector valve 9 first port 91 is connected with the remote control orifice 203 of pilot operated compound relief valve 20 by the 8th hydraulic tubing P8; Second port 92 of discharge opeing selector valve 9 is connected with oil storage tank 21 by the 9th hydraulic tubing P9; Discharge opeing selector valve 9 has: primary importance I, is connected with the second port 92 of discharge opeing selector valve 9 at the first port 91 of this position discharge opeing selector valve 9; Second place II, in this position, the first port 91 of discharge opeing selector valve 9 all seals with the second port 92 of discharge opeing selector valve 9; Discharge opeing selector valve 9 is solenoid valves, and its valve core movement is controlled to primary importance I by solenoid, and spool returns second place II by Returnning spring;
Second port 202 of described pilot operated compound relief valve 20 is connected with oil storage tank 21 by the 7th hydraulic tubing P7, and its pilot pressure is demarcated as the threshold value of a setting, and this threshold value is the pressure maximum allowed when working of accumulator 1;
When the remote control orifice 203 of described pilot operated compound relief valve 20 is connected by discharge opeing selector valve 9 and oil storage tank 21, its main valve plug just can be opened under very little action of hydraulic force, realizes overflow, makes hydraulic pump/motor 5 off-load.
The working procedure of the present embodiment and principle are:
The operating mode that described control unit 22 is current according to pumping unit, controls the working state of accumulator selector valve 3, discharge opeing selector valve 9, hydraulic pump/motor 5 and motor 10, pressure transducer 2 be connected to control unit 22.According to the function that described mixed power pumping unit realizes, this system can be divided into following several pattern:
Accumulator priming mode, when the present invention opens, control unit 22 detects the pressure in accumulator 1 by pressure transducer 2, and when the pressure in accumulator 1 is less than default preacceleration inflation force value, the present invention enters accumulator priming mode.In this mode, under the control of control unit 22, first clutch 13 engages, and second clutch 17 is separated; Accumulator selector valve 3 is in primary importance I place, and discharge opeing selector valve 9 is in second place II.Motor 10 is operated in drive pattern, and motor 10 drives hydraulic pump/motor 5 by the second coupling 11, first clutch input shaft 12, first clutch 13, first clutch driven shaft 14, dynamic coupling device 8, first dynamic coupling device axle 7 and the first coupling 6 successively; At this moment hydraulic pump/motor 5 is operated in pump pattern, hydraulic oil is extracted out by the second hydraulic tubing P2 by hydraulic pump/motor 5 from oil storage tank 21, hydraulic pump/motor 5 is arrived after accumulator selector valve 3 and the 6th hydraulic tubing P6, afterwards under the effect of hydraulic pump/motor 5, fluid is filled with in accumulator 1 through the 5th hydraulic tubing P5, one-way valve 4, the 3rd hydraulic tubing P3, accumulator selector valve 3.When the working pressure in accumulator 1 reaches the pressure maximum that it allows, the hydraulic oil of discharging from hydraulic pump/motor 5 pump is through pilot operated compound relief valve 20 overflow after the 5th hydraulic tubing P5, the 4th hydraulic tubing P4, and hydraulic oil flows in oil storage tank 21 through the 7th hydraulic tubing P7 afterwards.After pilot operated compound relief valve 20 starts overflow, control unit 22 controls discharge opeing selector valve 9 and is switched to primary importance I, at this moment, the hydraulic oil of discharging from hydraulic pump/motor 5 pump is drained into oil storage tank 21 after the 5th hydraulic tubing P5, the 4th hydraulic tubing P4, the 8th hydraulic tubing P8, discharge opeing selector valve 9 and the 9th hydraulic tubing P9, realizes the off-load that accumulator preliminary filling terminates rear hydraulic pump/motor 5.
Accumulator fills can pattern, and when the present invention is in down stroke, control unit 22 detects the pressure in accumulator 1 by pressure transducer 2, and when the pressure in accumulator 1 is less than the maximum pressure value that it allows, the present invention enters that accumulator fills can pattern.In this mode, under the control of control unit 22, first clutch 13 is separated, and second clutch 17 combines; Accumulator selector valve 3 is in primary importance I place, and discharge opeing selector valve 9 is in second place II.Pumping unit main body 19 drives hydraulic pump/motor 5 by second clutch driven shaft 18, second clutch 17, second clutch input shaft 16, the 3rd coupling 15, second dynamic coupling device axle, dynamic coupling device 8, first dynamic coupling device axle 7 and the first coupling 6 successively; At this moment, motor 10 does not work, and hydraulic pump/motor 5 is operated in pump pattern.Hydraulic oil is extracted out by the second hydraulic tubing P2 by hydraulic pump/motor 5 from oil storage tank 21, hydraulic pump/motor 5 is arrived after accumulator selector valve 3 and the 6th hydraulic tubing P6, afterwards under the effect of hydraulic pump/motor 5, hydraulic oil is filled with in accumulator 1 through the 5th hydraulic tubing P5, one-way valve 4, the 3rd hydraulic tubing P3, accumulator selector valve 3.When the working pressure in accumulator 1 reaches the pressure maximum that it allows, the hydraulic oil of discharging from hydraulic pump/motor 5 pump is through pilot operated compound relief valve 20 overflow after the 5th hydraulic tubing P5, the 4th hydraulic tubing P4, and hydraulic oil flows in oil storage tank 21 through the 7th hydraulic tubing P7 afterwards.After pilot operated compound relief valve 20 starts overflow, control unit 22 controls discharge opeing selector valve 9 and is switched to primary importance I, at this moment, the hydraulic oil of discharging from hydraulic pump/motor 5 pump is drained into oil storage tank 21 after the 5th hydraulic tubing P5, the 4th hydraulic tubing P4, the 8th hydraulic tubing P8, discharge opeing selector valve 9 and the 9th hydraulic tubing P9, realizes the off-load of hydraulic pump/motor 5.
Hydraulic pump/motor assistant mode, when the present invention works, when the driving force that motor 10 can provide is less than the driving force driven needed for pumping unit main body 19, the present invention enters hydraulic pump/motor assistant mode.In this mode, under the control of control unit 22, first clutch 13 engages, and second clutch 17 combines; Accumulator selector valve 3 is in the 3rd III place, position, and discharge opeing selector valve 9 is in primary importance I, and hydraulic pump/motor 5 is operated in motoring mode.In this mode, control motor 10 and be operated in efficient district, the driving force that motor 10 is not enough to provide is supplemented by hydraulic pump/motor 5.On the one hand, motor 10 passes through the second coupling 11, first clutch input shaft 12, first clutch 13 and first clutch driven shaft 14 by transmission of power successively to dynamic coupling device 8; On the other hand, hydraulic pump/motor 5 simultaneously also by the first coupling 6 and the first dynamic coupling device axle 7 by transmission of power to dynamic coupling device 8.Power, after dynamic coupling device 8 is coupled, is delivered to pumping unit main body 19 through the second dynamic coupling device axle, the 3rd coupling 15, second clutch input shaft 16, second clutch 17, second clutch driven shaft 18, and then drives pumping unit main body 19.In this mode, the hydraulic oil in accumulator 1 enters hydraulic pump/motor 5 through the first hydraulic tubing P1, accumulator selector valve 3, the 6th hydraulic tubing P6, thus drives hydraulic pump/motor 5; Afterwards, the hydraulic oil of discharging from hydraulic pump/motor 5 pump is drained into oil storage tank 21 after the 5th hydraulic tubing P5, the 4th hydraulic tubing P4, the 8th hydraulic tubing P8, discharge opeing selector valve 9 and the 9th hydraulic tubing P9.
Pressure maintain pattern, when accumulator fill can complete and not need hydraulic pump/motor 5 power-assisted time, the present invention enter pressure maintain pattern.In this mode, under the control of control unit 22, first clutch 13 engages, and second clutch 17 combines; Accumulator selector valve 3 is in second place II place, and discharge opeing selector valve 9 is in primary importance I.At this moment hydraulic pump/motor 5 does not work.Motor 10 works independently, and drives pumping unit main body 19 to carry out oil pumping operation.Motor 10 is delivered to pumping unit main body 19 by the second coupling 11, first clutch input shaft 12, first clutch 13 and first clutch driven shaft 14, power through dynamic coupling device 8, second dynamic coupling device axle, the 3rd coupling 15, second clutch input shaft 16, second clutch 17, second clutch driven shaft 18 successively, and then drives pumping unit main body 19.Dynamic coupling device 8 also drives hydraulic pump/motor 5 to dally by the first dynamic coupling device axle 7, first coupling 6 simultaneously.Hydraulic oil is extracted out by the second hydraulic tubing P2 by hydraulic pump/motor 5 from oil storage tank 21, hydraulic pump/motor 5 is arrived after accumulator selector valve 3 and the 6th hydraulic tubing P6, afterwards under the effect of hydraulic pump/motor 5, hydraulic oil is drained into oil storage tank 21 after the 5th hydraulic tubing P5, the 4th hydraulic tubing P4, the 8th hydraulic tubing P8, discharge opeing selector valve 9 and the 9th hydraulic tubing P9, realizes the off-load of hydraulic pump/motor 5.
Described second clutch driven shaft 18 is pumping unit main body input shafts.
Described first clutch driven shaft 14 is second dynamic coupling device axles.
System described in the present embodiment in different modes the position of corresponding valve and the state of clutch as shown in the table:

Claims (1)

1. a mixed power pumping unit, it is characterized in that: be by accumulator (1), pressure transducer (2), accumulator selector valve (3), one-way valve (4), hydraulic pump/motor (5), first coupling (6), dynamic coupling device (8), discharge opeing selector valve (9), motor (10), second coupling (11), first clutch (13), 3rd coupling (15), second clutch (17), pumping unit main body (19), pilot operated compound relief valve (20), oil storage tank (21), control unit (22), first hydraulic tubing (P1), second hydraulic tubing (P2), 3rd hydraulic tubing (P3), 4th hydraulic tubing (P4), 5th hydraulic tubing (P5), 6th hydraulic tubing (P6), 7th hydraulic tubing (P7), 8th hydraulic tubing (P8) and the 9th hydraulic tubing (P9) are formed,
The output shaft of described motor (10) is fixedly connected with first clutch input shaft (12) by the second coupling (11); Driven disc and the first clutch driven shaft (14) of first clutch (13) pass through spline joint; First clutch driven shaft (14) is fixedly connected with second clutch input shaft (16) by the 3rd coupling (15); Driven disc and the second clutch driven shaft (18) of second clutch (17) pass through spline joint; First dynamic coupling device axle (7) is connected with hydraulic pump/motor (5) output shaft by the first coupling (6);
Described dynamic coupling device (8) is a gear-box, it forms primarily of a pair pitch wheel, the first dynamic coupling device axle, the second dynamic coupling device axle and dynamic coupling device housing, and wherein two gears are connected with the second dynamic coupling device axle with the first dynamic coupling device axle respectively by spline;
Described accumulator selector valve (3) is three-position four-way valve, and first port (31) of accumulator selector valve (3) is connected with oil storage tank (21) by the second hydraulic tubing (P2); Second port (32) of accumulator selector valve (3) is connected with accumulator (1) by the first hydraulic tubing (P1); 3rd port (33) of accumulator selector valve (3) is connected with first port (201) of pilot operated compound relief valve (20) with the 4th hydraulic tubing (P4) by the 3rd hydraulic tubing (P3), and the 3rd port (33) of accumulator selector valve (3) is also connected with first port (50) of hydraulic pump/motor (5) with the 5th hydraulic tubing (P5) by the 3rd hydraulic tubing (P3) simultaneously; 4th port (34) of accumulator selector valve (3) is connected with second port (51) of hydraulic pump/motor (5) by the 6th hydraulic tubing (P6); Accumulator selector valve (3) has: primary importance I, in this position, first port (31) of accumulator selector valve (3) is connected to the 4th port (34) of accumulator selector valve (3), and second port (32) of accumulator selector valve (3) is connected to the 3rd port (33) of accumulator selector valve (3); Second place II, the first port (31) in this position accumulator selector valve (3) is connected with the 3rd port (33) of accumulator selector valve (3) and the 4th port (34) of accumulator selector valve (3) simultaneously, and second port (32) of accumulator selector valve (3) is closed; 3rd position III, first port (31) of accumulator selector valve (3) is connected with the 3rd port (33) of accumulator selector valve (3), and second port (32) of accumulator selector valve (3) is connected with the 4th port (34) of accumulator selector valve (3);
Described one-way valve (4) is plugged on the 3rd hydraulic tubing (P3), and allows fluid only can flow towards accumulator selector valve (3); 3rd hydraulic tubing (P3), the 4th hydraulic tubing (P4) are connected at node N1 place with the 5th hydraulic tubing (P5);
Described pressure transducer (2) is connected on the first hydraulic tubing (P1);
Described discharge opeing selector valve (9) is two position two-way valve, and the connection of its each port is as follows: discharge opeing selector valve (9) first port (91) is connected with the remote control orifice (203) of pilot operated compound relief valve (20) by the 8th hydraulic tubing (P8); Second port (92) of discharge opeing selector valve (9) is connected with oil storage tank (21) by the 9th hydraulic tubing (P9); Discharge opeing selector valve (9) has primary importance (I), is connected with second port (92) of discharge opeing selector valve (9) at first port (91) of this position discharge opeing selector valve (9); The second place (II), in this position, first port (91) of discharge opeing selector valve (9) and second port (92) of discharge opeing selector valve (9) all seal;
Second port (202) of described pilot operated compound relief valve (20) is connected with oil storage tank (21) by the 7th hydraulic tubing P7, its pilot pressure is demarcated as the threshold value of a setting, pressure maximum allowed when this threshold value is accumulator (1) work;
When the remote control orifice (203) of described pilot operated compound relief valve (20) is connected by discharge opeing selector valve (9) and oil storage tank (21), its main valve plug just can be opened under very little action of hydraulic force, realize overflow, make hydraulic pump/motor (5) off-load;
Described second clutch driven shaft (18) is pumping unit main body input shaft;
Described first clutch driven shaft (14) is the second dynamic coupling device axle.
CN201410037526.7A 2014-01-26 2014-01-26 Mixed power pumping unit Expired - Fee Related CN103742490B (en)

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CN104595255A (en) * 2014-12-30 2015-05-06 吉林大学 Hydraulic auxiliary power energy-saving system of beam oil pumping unit
CN107269250A (en) * 2017-08-20 2017-10-20 李振河 Multi-energy hybrid power hydraulic pumping unit
CN107420072A (en) * 2017-09-21 2017-12-01 李振河 A kind of double motor driving hydraulic pumping unit based on Hydrostatic drive technology
CN111101904A (en) * 2020-01-19 2020-05-05 胡勇 Double-machine double-well interactive balance device of winch type non-beam pumping unit
CN113757193A (en) * 2021-09-02 2021-12-07 浙江大学 Electro-hydrostatic energy storage unit
CN114645694B (en) * 2022-05-23 2022-07-19 山东胜信石油装备有限公司 Vertical oil pumping machine capable of automatically adjusting stroke frequency and balancing

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