CN208089461U - A kind of wind power generating set braked and locked using hydraulic cushion - Google Patents
A kind of wind power generating set braked and locked using hydraulic cushion Download PDFInfo
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- CN208089461U CN208089461U CN201820577405.5U CN201820577405U CN208089461U CN 208089461 U CN208089461 U CN 208089461U CN 201820577405 U CN201820577405 U CN 201820577405U CN 208089461 U CN208089461 U CN 208089461U
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- 230000001502 supplementing effect Effects 0.000 claims description 30
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010248 power generation Methods 0.000 abstract description 7
- 230000007423 decrease Effects 0.000 abstract 1
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 183
- 230000003139 buffering effect Effects 0.000 description 13
- 239000007788 liquid Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model belongs to technical field of wind power generation.Cause cabinet vibrations and brake mill damage that braking effect is caused to decline to exist when solving the problem of wind power generating set using the brake of conventional mechanical formula, the wind power generating set that the utility model discloses a kind of to be braked and be locked using hydraulic cushion.The wind power generating set, including hydraulic pump, hydraulic motor, wind wheel, generator and repairing unit, hydraulic cushion unit and hydraulic locking unit；Wherein, the major circulatory system of normal operation can be switched to by hydraulic cushion unit by braking cycle system, completes, to the buffer-braking of generator unit, hydraulic pump can be isolated by hydraulic locking unit, realizes the locking to wind wheel and hydraulic pump.The wind power generating set of the utility model utilizes hydraulic cushion unit and hydraulic locking unit, may be implemented to the steady buffer-braking of generating set and locking, to avoid shaking, improves the protection to generating set, ensures the stabilization of braking effect.
Description
Technical Field
The utility model belongs to the technical field of wind power generation, concretely relates to adopt wind generating set of hydraulic cushion braking and locking.
Background
With the exhaustion of traditional energy in the world in recent years, new energy sources are on the stage. The wind power generation has been developed for a long time, and makes due contribution to the exhaustion of world energy and environmental crisis. Therefore, new hydraulic wind turbine installations have gained unprecedented attention and have been tested or placed into service around the world, replacing the traditional mechanical geared turbine generators. The brake system of the wind generating set plays a crucial role in normal operation of the whole generating set. The brake system of the wind generating set is mainly used for the safety system of the wind turbine. The wind turbine brake includes normal brake during maintenance of the main circulating system and emergency temporary brake caused by overload, strong wind and other accidents of the wind turbine.
At present, a conventional mechanical brake is usually adopted in a hydraulic wind generating set, for example, the brake is completed by means of the direct braking of a brake disc to a rotating shaft. However, in the process of the mechanical friction brake, the chassis is usually vibrated severely, particularly in the emergency brake process, the vibration is more obvious and severe, the stability and the safety of the operation of the whole generator set are affected, and the brake effect of the brake disc is remarkably reduced along with the continuous deepening of the abrasion degree of the brake disc after the brake disc works for a long time, so that the brake effect is affected, and the potential safety hazard is brought to the operation of the generator set.
SUMMERY OF THE UTILITY MODEL
When adopting conventional mechanical brake in order to solve wind generating set, the existence arouses quick-witted case vibrations and brake disc wearing and tearing to lead to the problem that the braking effect descends, the utility model provides an adopt wind generating set of hydraulic cushion braking and locking. The wind generating set comprises a hydraulic pump, a hydraulic motor, a wind wheel, a generator, an oil supplementing unit, a hydraulic buffer unit and a hydraulic locking unit; wherein,
an oil outlet of the hydraulic pump is connected with an oil inlet of the hydraulic motor through a high-pressure oil path, and an oil outlet of the hydraulic motor is connected with an oil inlet of the hydraulic pump through a low-pressure oil path; the wind wheel is connected with an input shaft of the hydraulic pump, and the generator is connected with an output shaft of the hydraulic motor;
the oil supplementing unit comprises an oil supplementing pump and an oil supplementing tank; an oil inlet of the oil replenishing pump is communicated with the oil replenishing tank, and an oil outlet of the oil replenishing pump is communicated with the low-pressure oil way;
the hydraulic buffer unit comprises a buffer overflow valve and a buffer reversing valve; the buffer overflow valve is positioned between the high-pressure oil way and the low-pressure oil way, an oil inlet of the buffer overflow valve is communicated with the high-pressure oil way, and an oil outlet of the buffer overflow valve is communicated with the low-pressure oil way; the buffer reversing valve is positioned in the high-pressure oil way, is positioned between an oil inlet of the hydraulic motor and an oil inlet of the buffer overflow valve and is used for controlling the on-off of the high-pressure oil way;
the hydraulic locking unit comprises a locking reversing valve, a hydraulic control one-way valve, a low-pressure one-way valve and an oil supplementing one-way valve; the hydraulic control one-way valve is positioned in the high-pressure oil way, and an oil outlet of the hydraulic control one-way valve is directly communicated with an oil outlet of the hydraulic pump; the low-pressure one-way valve is positioned in the low-pressure oil way, and an oil outlet of the low-pressure one-way valve is directly communicated with an oil inlet of the hydraulic pump; the oil supplementing one-way valve is positioned between an oil outlet of the oil supplementing pump and the low-pressure oil way, and an oil outlet of the oil supplementing one-way valve is communicated with an oil inlet of the hydraulic pump and an oil outlet of the low-pressure one-way valve simultaneously; the locking reversing valve comprises an A port, a P port and a T port, the A port is communicated with a control oil port of the hydraulic control one-way valve, the P port is communicated with an oil outlet of the oil replenishing pump, and the T port is communicated with the oil replenishing tank; when the locking reversing valve is located at a first working position, the port A is communicated with the port P, and the port T is closed; when the locking reversing valve is located at a second working position, the port A is communicated with the port T, and the port P is closed.
Preferably, the wind generating set further comprises a rotation speed sensor, wherein the rotation speed sensor is located between the wind wheel and the hydraulic pump and used for detecting the rotation speed of the wind wheel.
Preferably, the wind generating set further comprises a low-pressure overflow valve, an oil inlet of the low-pressure overflow valve is communicated with the low-pressure oil way, and an oil outlet of the low-pressure overflow valve is communicated with the oil supplementing tank.
Preferably, the oil supplementing unit further comprises an oil supplementing overflow valve, an oil inlet of the oil supplementing overflow valve is communicated with an oil outlet of the oil supplementing pump, and an oil outlet of the oil supplementing pump is communicated with the oil supplementing tank.
Preferably, the buffering reversing valve is a two-position two-way electromagnetic reversing valve.
Preferably, the buffering reversing valve adopts a spring reset structure, and when the buffering reversing valve is in a power-off reset state, an oil inlet and an oil outlet of the buffering reversing valve are disconnected.
Preferably, the buffer overflow valve is an electro-hydraulic proportional overflow valve.
Preferably, the locking reversing valve adopts a two-position electromagnetic reversing valve.
Further preferably, the locking reversing valve adopts a spring reset structure, and when the locking reversing valve is in a power-off reset state, the port A is communicated with the port T, and the port P is closed.
The utility model discloses a wind generating set has following beneficial effect when carrying out hydraulic cushion braking and locking:
1. the utility model discloses an among the wind generating set normal operating process, through the switching to the buffering switching-over valve with to the control of buffering overflow valve can be with the brake circulation system of main circulation system fast switch-over to no hydraulic motor to guarantee that the hydraulic pump utilizes the overflow pressure that promotes gradually to the buffering overflow valve under the condition of continuation normal output high pressure fluid, increase the oil-out pressure of hydraulic pump gradually, overcome the power that the hydraulic pump produced under the wind wheel drives, make wind wheel and hydraulic pump stall steady gradually. Like this, utilize the gradual promotion of overflow pressure in the buffering overflow valve, guaranteed can not produce the braking impact to the hydraulic pump in whole braking process, even if the braking also can make the steady switching of whole wind generating set to the braking circulation system when beginning in to avoid the vibrations of braking process, improved the protection to generating set, guaranteed the stability of braking effect.
2. The utility model discloses an among the wind generating set, through the cooperation work of locking switching-over valve, liquid accuse check valve, low pressure check valve and benefit oily check valve, the hydraulic pump after will braking keeps apart completely, seals the oil inlet and the oil-out of hydraulic pump simultaneously, makes the unable drive hydraulic pump of external effort carry out forward and reverse rotation to the realization is to the locking of wind wheel and hydraulic pump. And under locking state, if the wind wheel receives unexpected impact and takes place when rotating in the twinkling of an eye, also can pass through the hydraulic pump with this impact force and transmit to hydraulic oil, utilize the micro compressibility of hydraulic oil, absorb impact force fast to avoid taking place hard impact between wind wheel and hydraulic pump, improve the protection to hydraulic pump and wind wheel.
Drawings
FIG. 1 is a system schematic diagram of a wind turbine generator system employing hydraulic buffer braking and locking of the present invention;
FIG. 2 is a schematic diagram of the system of the wind turbine generator system during the buffering and braking;
fig. 3 is a schematic diagram of the system of the present invention when the wind generating set is locked.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Combine fig. 1 to show, the utility model discloses a wind generating set, including hydraulic pump 1, hydraulic motor 2, wind wheel 3, generator 4 and oil supplementing unit 5, hydraulic pressure buffer unit 6 and hydraulic pressure locking unit 7.
The oil outlet of the hydraulic pump 1 is connected with the oil inlet of the hydraulic motor 2 through a high-pressure oil path 81, and the oil outlet of the hydraulic motor 2 is connected with the oil inlet of the hydraulic pump 1 through a low-pressure oil path 82, so that a closed-loop main circulation system is formed. The wind wheel 3 is connected with the input shaft of the hydraulic pump 1, and the generator 4 is connected with the output shaft of the hydraulic motor 2. At the moment, the wind wheel 3 is driven by external wind power to rotate, so that the hydraulic pump 1 is driven to rotate to output high-pressure oil, the high-pressure oil flows to the hydraulic motor 2 through the high-pressure oil path 81 and drives the hydraulic motor 2 to rotate, and the generator 4 is driven to run to generate power.
Wherein, in this embodiment, variable displacement motor is chooseed for use to hydraulic motor 2, and through the discharge capacity adjustment to hydraulic motor 2, can make hydraulic motor 2 carry out better matching with the high-pressure fluid of the different flow of hydraulic pump 1 output like this to make hydraulic motor 2's operation can match with the wind regime of external difference, guarantee the power generation effect of continuous stability.
In addition, a rotating speed sensor 91 is further arranged between the hydraulic pump 1 and the wind wheel 3 and used for detecting the real-time rotating speed of the wind wheel 3, so that real-time reference data can be provided for the displacement adjustment of the hydraulic motor 2, and the rapidity and the accuracy of the adjustment of the hydraulic motor 2 are improved.
The oil supply unit 5 includes an oil supply pump 51 and an oil supply tank 52. An oil inlet of the oil replenishing pump 51 is communicated with the oil replenishing tank 52, and an oil outlet of the oil replenishing pump 51 is communicated with the low-pressure oil path 82. At this time, the oil replenishing pump 51 is driven by the motor to deliver the low-temperature oil in the oil replenishing tank 52 to the main circulation system for replenishing and cooling the oil, thereby ensuring the normal operation of the main circulation system.
Preferably, in the present embodiment, the oil supply unit 5 is further provided with an oil supply relief valve 53 and an oil supply pressure gauge 54. An oil inlet of the oil-supplementing overflow valve 53 is communicated with an oil outlet of the oil-supplementing pump 51, an oil outlet of the oil-supplementing overflow valve 53 is communicated with the oil-supplementing tank 52, and the oil-supplementing pressure gauge 54 is located at the oil outlet of the oil-supplementing pump 51. At this time, the pressure of the supplementary oil liquid output by the oil supplementary pump 51 can be monitored in real time through the oil supplementary pressure gauge 54, and the pressure of the supplementary oil liquid output by the oil supplementary pump 51 can be changed through adjusting the oil supplementary overflow valve 53, so that the supplementary oil liquid output by the oil supplementary pump 51 and the pressure of the oil liquid in the low-pressure oil path 82 can be kept in a suitable state, pressure fluctuation of the oil liquid in the main sequential system caused by overhigh or overlow supplementary oil liquid pressure is avoided, and stable flowing of the oil liquid pressure in the main circulating system is ensured.
The hydraulic buffer unit 6 comprises a buffer overflow valve 61 and a buffer reversing valve 62. The buffer overflow valve 61 is located between the high-pressure oil path 81 and the low-pressure oil path 82, an oil inlet of the buffer overflow valve 61 is communicated with the high-pressure oil path 81, and an oil outlet of the buffer overflow valve 61 is communicated with the low-pressure oil path 82. The buffer reversing valve 62 is positioned in the high-pressure oil path 81 and between the oil inlet of the hydraulic motor 2 and the oil inlet of the buffer overflow valve 61, and is used for controlling the on-off of the high-pressure oil path 81.
During the normal power generation operation of the wind generating set, the buffer reversing valve 62 is in a passage state, the high-pressure oil passage 81 is kept communicated, and the buffer overflow valve 61 is used as a safety valve of the main circulation system to control the highest pressure of the main circulation system and ensure the safe operation of the main circulation system.
Preferably, in this embodiment, the buffer relief valve 61 is an electro-hydraulic proportional relief valve. Like this, not only can realize the automatic control of remote to buffering overflow valve 61, can improve the regulation precision and the governing speed to buffering overflow valve 61 pressure moreover, realize the accurate quick control to main circulation system pressure.
Preferably, the buffer reversing valve 62 is a two-position two-way electromagnetic reversing valve, and the remote action control of the buffer reversing valve 62 can be realized by using an electrical signal. Further, the cushion change-over valve 62 adopts a spring return structure, and in the return state, the cushion change-over valve 62 maintains the open circuit state. Therefore, when the buffer reversing valve 62 is in a power-off state due to unexpected power failure of the whole generator set, the high-pressure oil way 81 can be directly switched and kept in a disconnected state, and the continuous power generation of the main circulation system is stopped, so that the continuous work of the main circulation system in an out-of-control state is avoided, and the safe and reliable control of the main circulation system is ensured.
The hydraulic locking unit 7 comprises a locking reversing valve 71, a hydraulic control one-way valve 72, a low-pressure one-way valve 73 and an oil supplementing one-way valve 74. Wherein the pilot operated check valve 72 is located in the high pressure oil passage 81, and an oil outlet of the pilot operated check valve 72 is directly communicated with an oil outlet of the hydraulic pump 1. The low-pressure check valve 73 is located in the low-pressure oil passage 82, and an oil outlet of the low-pressure check valve 73 is directly communicated with an oil inlet of the hydraulic pump 1. The oil-replenishing check valve 74 is located between the oil outlet of the oil-replenishing pump 51 and the low-pressure oil path 82, and the oil outlet of the oil-replenishing check valve 74 is communicated with the oil inlet of the hydraulic pump 1 and the oil outlet of the low-pressure check valve 73 at the same time. The locking reversing valve 71 comprises an A port, a P port and a T port, the A port is communicated with a control oil port of the hydraulic control one-way valve 72, the P port is communicated with an oil outlet of the oil replenishing pump 51, the T port is communicated with the oil replenishing tank 52, and when the locking reversing valve 71 is located at a first working position, the A port is communicated with the P port, and the T port is closed; when the locking reversing valve 71 is located at the second working position, the port A is communicated with the port T, and the port P is closed.
At this time, a part of the supplementary oil outputted from the oil supply pump 51 is used as control oil, and flows to the control oil port of the pilot operated check valve 72 through the locking reversing valve 71, so that the main valve of the pilot operated check valve 72 is opened to communicate the oil inlet and the oil outlet thereof, and the high-pressure oil outputted from the hydraulic pump 1 can directly flow to the hydraulic motor 2 through the pilot operated check valve 72.
In this embodiment, the locking reversing valve 71 is a two-position four-way electromagnetic reversing valve, wherein the port B in the reversing valve is always in a closed state, and in other embodiments, the two-position three-way reversing valve can also be directly used as the locking reversing valve 71 to realize the switching between the port a and the ports P and T.
Meanwhile, in the present embodiment, the locking reversing valve 71 also adopts a spring return structure, and in the return state, the port a is communicated with the port T, and the port P is in the closed state. Thus, when the locking reversing valve 71 is in a power-off state due to the power failure of the whole generator set, the oil path between the hydraulic control one-way valve 72 and the oil replenishing pump 51 can be directly cut off, and the control oil port of the hydraulic control one-way valve 72 is communicated with the oil replenishing tank 52, so that the hydraulic control one-way valve 72 is in a closed state, the hydraulic pump 1 is stopped from continuously providing high-pressure oil for the hydraulic motor 2, the main circulation system is stopped from working, and the safety and reliability of the generator set in a runaway state are ensured.
In addition, as shown in fig. 1, a pressure gauge 92 is further disposed in the high-pressure oil path 81 and located between the pilot-operated check valve 72 and the buffer reversing valve 62, so as to monitor the oil pressure in the high-pressure oil path 81 in real time and adjust the pressure in cooperation with the buffer relief valve 61. The low-pressure oil path 82 is also provided with a low-pressure overflow valve 83, wherein an oil inlet of the low-pressure overflow valve 83 is communicated with the low-pressure oil path 82, an oil outlet of the low-pressure overflow valve 83 is communicated with the oil supplementing tank 52 and is used for controlling the pressure of oil in the low-pressure oil path 82, and part of high-temperature oil in the low-pressure oil path 82 is drained to the oil supplementing tank 52 in time so as to be matched with the oil supplementing pump 51 to supplement low-temperature oil in the low-pressure oil path 82 again, so that the oil temperature of the main circulation system is.
The utility model discloses a wind generating set mainly has following three kinds of operating condition at the operation in-process:
the first working state is a normal operation power generation stage. At this stage, as shown in fig. 1, the oil replenishment pump 51 is kept in operation to continuously output replenishment oil having a pressure that can be adjusted and controlled by the oil replenishment relief valve 53. The locking reversing valve 71 is in an energized state, that is, the port a is communicated with the port P, and the port T is in a closed state, so that the oil replenishing pump 51 is communicated with the control oil port of the hydraulic control check valve 72, the hydraulic control check valve 72 is kept in an open state, and the buffering reversing valve 62 is also in an energized state, so that the whole high-pressure oil path 81 is kept in an open state. At this time, the wind wheel 3 is driven by external wind energy to drive the hydraulic pump 1 to output high-pressure oil, and the high-pressure oil is conveyed to the hydraulic motor 2 through the high-pressure oil path 81 to drive the generator 4 to generate electricity. Meanwhile, the buffer overflow valve 61 is used as a main safety valve to control the highest pressure of the main circulation system, and the low-pressure overflow valve 83 and the oil supplementing pump 51 are matched with each other to supplement oil and cool the main circulation system, so that the continuous and stable work of the main circulation system is ensured.
The second working state is a buffering braking stage. As shown in fig. 1 and 2, at this stage, the buffer selector valve 62 is first switched to the open state by cutting off the power, the high-pressure oil path 81 is cut off to connect the hydraulic pump 1 and the hydraulic motor 2, and the control signal of the buffer relief valve 61 is rapidly reduced to a small signal, so that the buffer relief valve 61 is at a low relief pressure. At this time, all the high-pressure oil output by the hydraulic pump 1 under the driving of the wind wheel 3 directly flows to the low-pressure oil path through the buffer overflow valve 61 and flows into the hydraulic pump 1 again through the low-pressure check valve 73, so as to form a braking circulation system. Then, according to the result of detecting the rotation speed of the wind wheel 3 by the rotation speed sensor 91, the control signal of the buffer overflow valve 61 is gradually adjusted, and the overflow pressure of the buffer overflow valve 61 is gradually increased, so that the pressure at the oil outlet end of the hydraulic pump 1 is increased, the hydraulic pump 1 and the wind wheel 3 gradually stop rotating, and finally the whole buffer braking process is completed.
The third operating state is the locking phase. Referring to fig. 1 and 3, after the operation of the buffer brake of the wind wheel 3 is completed, the oil supply pump 51 is turned off to stop the continuous output of the supply oil, and the locking reversing valve 71 is powered off to switch the port a to be communicated with the port T and close the port P, so that the hydraulic control check valve 72 loses the control oil and is switched to the one-way open state, and the oil output by the hydraulic pump 1 cannot continuously pass through the hydraulic check valve 72. At this time, under the combined action of the hydraulic control check valve 72, the low-pressure check valve 73 and the oil supplementing check valve 74, the oil inlet and the oil outlet of the hydraulic pump 1 are simultaneously cut off, so that the hydraulic pump 1 is in an isolated state and cannot rotate forward and backward under the driving of external acting force, and the hydraulic pump 1 and the wind wheel 3 are locked.
Claims (9)
1. A wind generating set adopting hydraulic buffer braking and locking is characterized by comprising a hydraulic pump, a hydraulic motor, a wind wheel, a generator, an oil supplementing unit, a hydraulic buffer unit and a hydraulic locking unit; wherein,
an oil outlet of the hydraulic pump is connected with an oil inlet of the hydraulic motor through a high-pressure oil path, and an oil outlet of the hydraulic motor is connected with an oil inlet of the hydraulic pump through a low-pressure oil path; the wind wheel is connected with an input shaft of the hydraulic pump, and the generator is connected with an output shaft of the hydraulic motor;
the oil supplementing unit comprises an oil supplementing pump and an oil supplementing tank; an oil inlet of the oil replenishing pump is communicated with the oil replenishing tank, and an oil outlet of the oil replenishing pump is communicated with the low-pressure oil way;
the hydraulic buffer unit comprises a buffer overflow valve and a buffer reversing valve; the buffer overflow valve is positioned between the high-pressure oil way and the low-pressure oil way, an oil inlet of the buffer overflow valve is communicated with the high-pressure oil way, and an oil outlet of the buffer overflow valve is communicated with the low-pressure oil way; the buffer reversing valve is positioned in the high-pressure oil way, is positioned between an oil inlet of the hydraulic motor and an oil inlet of the buffer overflow valve and is used for controlling the on-off of the high-pressure oil way;
the hydraulic locking unit comprises a locking reversing valve, a hydraulic control one-way valve, a low-pressure one-way valve and an oil supplementing one-way valve; the hydraulic control one-way valve is positioned in the high-pressure oil way, and an oil outlet of the hydraulic control one-way valve is directly communicated with an oil outlet of the hydraulic pump; the low-pressure one-way valve is positioned in the low-pressure oil way, and an oil outlet of the low-pressure one-way valve is directly communicated with an oil inlet of the hydraulic pump; the oil supplementing one-way valve is positioned between an oil outlet of the oil supplementing pump and the low-pressure oil way, and an oil outlet of the oil supplementing one-way valve is communicated with an oil inlet of the hydraulic pump and an oil outlet of the low-pressure one-way valve simultaneously; the locking reversing valve comprises an A port, a P port and a T port, the A port is communicated with a control oil port of the hydraulic control one-way valve, the P port is communicated with an oil outlet of the oil replenishing pump, and the T port is communicated with the oil replenishing tank; when the locking reversing valve is located at a first working position, the port A is communicated with the port P, and the port T is closed; when the locking reversing valve is located at a second working position, the port A is communicated with the port T, and the port P is closed.
2. The wind generating set of claim 1, further comprising a rotational speed sensor positioned between the rotor and the hydraulic pump for detecting a rotational speed of the rotor.
3. The wind generating set according to claim 1, further comprising a low-pressure overflow valve, wherein an oil inlet of the low-pressure overflow valve is communicated with the low-pressure oil path, and an oil outlet of the low-pressure overflow valve is communicated with the oil replenishing tank.
4. The wind generating set according to claim 1, wherein the oil supply unit further comprises an oil supply overflow valve, an oil inlet of the oil supply overflow valve is communicated with an oil outlet of the oil supply pump, and the oil outlet is communicated with the oil supply tank.
5. The wind generating set according to any one of claims 1-4, wherein the buffer reversing valve is a two-position two-way electromagnetic reversing valve.
6. The wind generating set according to claim 5, wherein the buffer reversing valve is of a spring return structure, and when the buffer reversing valve is in a power-off return state, an oil inlet and an oil outlet of the buffer reversing valve are disconnected.
7. The wind generating set according to any one of claims 1 to 4, wherein the buffer overflow valve is an electro-hydraulic proportional overflow valve.
8. The wind generating set according to any one of claims 1 to 4, wherein the locking reversing valve is a two-position electromagnetic reversing valve.
9. The wind generating set according to claim 8, wherein the locking reversing valve adopts a spring return structure, and when the locking reversing valve is in a power-off return state, the port A is communicated with the port T, and the port P is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820577405.5U CN208089461U (en) | 2018-04-23 | 2018-04-23 | A kind of wind power generating set braked and locked using hydraulic cushion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820577405.5U CN208089461U (en) | 2018-04-23 | 2018-04-23 | A kind of wind power generating set braked and locked using hydraulic cushion |
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| Publication Number | Publication Date |
|---|---|
| CN208089461U true CN208089461U (en) | 2018-11-13 |
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|---|---|---|---|
| CN201820577405.5U Expired - Fee Related CN208089461U (en) | 2018-04-23 | 2018-04-23 | A kind of wind power generating set braked and locked using hydraulic cushion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443062A (en) * | 2018-04-23 | 2018-08-24 | 兰州理工大学 | A kind of wind power generating set braked and locked using hydraulic cushion |
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2018
- 2018-04-23 CN CN201820577405.5U patent/CN208089461U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443062A (en) * | 2018-04-23 | 2018-08-24 | 兰州理工大学 | A kind of wind power generating set braked and locked using hydraulic cushion |
| CN108443062B (en) * | 2018-04-23 | 2023-10-03 | 兰州理工大学 | Wind generating set adopting hydraulic buffer braking and locking |
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Granted publication date: 20181113 Termination date: 20210423 |
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| CF01 | Termination of patent right due to non-payment of annual fee |