CN114321093B - Multi-pin locking hydraulic control system and wind generating set - Google Patents
Multi-pin locking hydraulic control system and wind generating set Download PDFInfo
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- CN114321093B CN114321093B CN202011052383.9A CN202011052383A CN114321093B CN 114321093 B CN114321093 B CN 114321093B CN 202011052383 A CN202011052383 A CN 202011052383A CN 114321093 B CN114321093 B CN 114321093B
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- 238000004891 communication Methods 0.000 claims description 19
- 239000003921 oil Substances 0.000 description 196
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 11
- 230000009471 action Effects 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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Abstract
The invention relates to a multi-pin locking hydraulic control system and a wind generating set, wherein the hydraulic control system comprises an oil supply way, a locking oil way, an unlocking oil way, an oil return main way and an oil return branch way; the oil supply path is selectively communicated with one of the locking oil path and the unlocking oil path through a first valve, and the oil return main path is selectively communicated with the other through the first valve; the locking oil way is provided with a second valve and a third valve, the second valve controls the first branch to be selectively communicated with the rodless cavity of one of the first telescopic cylinder and the second telescopic cylinder, the second branch is selectively communicated with the rodless cavity of the other one, the third valve controls the second branch to be communicated under preset pressure, the rod cavities of the telescopic cylinders are all connected to the unlocking oil way, and the oil return branch is connected with the first branch and the second branch and is unidirectionally communicated from the second branch to the first branch. The embodiment of the invention can connect and control a plurality of locking pins, realize orderly work of each locking pin and meet the locking or unlocking requirements of parts such as impellers.
Description
Technical Field
The invention relates to the technical field of wind power, in particular to a multi-pin locking hydraulic control system and a wind generating set.
Background
In order to meet the functional requirements, in some devices, one component will typically rotate relative to the other component. After a long period of operation, the two components often need to be subjected to some maintenance actions, and in order to ensure the safety performance during maintenance, the relative positions of the two components can be locked by using a locking system.
In order to meet the power generation requirement, the impeller of the wind generating set needs to rotate relative to the engine room so as to drive the rotor of the generator to move relative to the stator, so that the wind generating set can convert wind energy into electric energy. After the impeller runs for a long time, parts such as a hub, blades and the like of the impeller need to be maintained, and maintenance personnel need to enter the impeller. In order to ensure the life safety of the staff, the impeller is prevented from rotating under the action of wind load when the impeller is maintained, and the staff needs to lock the position of the impeller relative to the cabin base through a locking system before entering the impeller.
In order to ensure the safety of the locking system, the impeller is generally provided with a multi-pin locking function in the clockwise direction and the anticlockwise direction, and in this case, how to realize orderly work of a plurality of locking pins so as to lock or unlock the impeller and other parts is a technical problem to be solved.
Disclosure of Invention
The embodiment of the invention provides a multi-pin locking hydraulic control system and a wind generating set, wherein the multi-pin locking hydraulic control system can be connected with and control a plurality of locking pins, so that each locking pin can work orderly, and the locking or unlocking requirements of parts such as impellers are met.
In one aspect, an embodiment according to the present invention provides a multi-pin locking hydraulic control system, including: the device comprises an oil supply way, a locking oil way, an unlocking oil way, an oil return main way, an oil return branch way, a first telescopic cylinder, a second telescopic cylinder and at least one third telescopic cylinder; the oil supply path is selectively communicated with one of the locking oil path and the unlocking oil path through a first valve, and the oil return main path is selectively communicated with the other one of the locking oil path and the unlocking oil path through the first valve; the locking oil way comprises a first branch and a second branch, the first branch is connected with the rodless cavities of the first telescopic cylinder and the second telescopic cylinder, the second branch is connected with the rodless cavities of the first telescopic cylinder, the second telescopic cylinder and the third telescopic cylinders, a second valve and a third valve are arranged on the locking oil way, the second valve controls the first branch to be selectively communicated with the rodless cavity of one of the first telescopic cylinder and the second telescopic cylinder, the second branch to be selectively communicated with the rodless cavity of the other one, and the third valve controls the second branch to be communicated under preset pressure; the rod cavities of the first telescopic cylinder, the second telescopic cylinder and the third telescopic cylinder are all connected to an unlocking oil way, and an oil return branch is connected with the first branch and the second branch and is unidirectionally conducted from the second branch to the first branch.
According to an aspect of the embodiment of the present invention, the first valve is switchable between a first switching position in which the lock oil passage communicates with the oil supply passage, the unlock oil passage communicates with the oil return main passage, and a second switching position in which the lock oil passage communicates with the oil return main passage, and the unlock oil passage communicates with the oil supply passage.
According to one aspect of the embodiment of the invention, the first valve is a three-position four-way reversing valve, the first valve comprises an oil inlet, an oil return port, a first interface and a second interface, the oil inlet is connected with the oil supply path, the oil return port is connected with the oil return main path, the first interface is connected with the locking oil path, and the second interface is connected with the unlocking oil path.
According to one aspect of an embodiment of the invention, the second valve is switchable between a third switching position in which the first branch communicates with the rodless chamber of the first telescopic cylinder, the second branch communicates with the rodless chamber of the second telescopic cylinder, and a fourth switching position in which the first branch communicates with the rodless chamber of the second telescopic cylinder, and the second branch communicates with the rodless chamber of the first telescopic cylinder.
According to one aspect of the embodiment of the invention, the second valve is a two-position four-way reversing valve, the second valve comprises a third interface, a fourth interface, a fifth interface and a sixth interface, the third interface is connected with the second branch, the fourth interface is connected with the first branch, the fifth interface is connected with the rodless cavity of the first telescopic cylinder, and the sixth interface is connected with the rodless cavity of the second telescopic cylinder.
According to an aspect of the embodiment of the present invention, the locking oil passage further includes a main oil passage, the locking oil passage is connected to the first valve through the main oil passage, and the first branch passage and the second branch passage are connected to the main oil passage, respectively.
According to an aspect of the embodiment of the present invention, the third valve is a sequence valve and is disposed on the second branch.
According to one aspect of the embodiment of the present invention, a protection valve is further provided on the second branch, and the protection valve disconnects the second branch when the pressure of the second branch exceeds a preset pressure.
According to one aspect of the embodiment of the invention, the oil return branch comprises a communication pipeline and a one-way valve arranged on the communication pipeline, one end of the communication pipeline is communicated with the first branch, the other end of the communication pipeline is communicated with the second branch and is positioned at the downstream of the protection valve, and the one-way valve is in one-way conduction from one end communicated with the second branch to one end communicated with the first branch.
According to one aspect of the embodiment of the invention, the oil supply path comprises an oil accommodating tank and a driver, wherein the driver is arranged in the oil accommodating tank and communicated with the first valve, and one end of the oil return main path, which is away from the first valve, is communicated with the oil accommodating tank.
In another aspect, according to an embodiment of the present invention, there is provided a wind turbine generator set including: a first part and a second part which are connected in a rotating way; the locking system comprises a base and a pin assembly, wherein the base is arranged on the first component, the pin assembly is arranged on the second component and faces to the base, the base is provided with a plurality of locking holes, and the pin assembly comprises a first locking pin, a second locking pin and at least one third locking pin which can be respectively in plug-in fit with any locking hole; in the multi-pin locking hydraulic control system, the first locking pin is connected to the first telescopic cylinder, the second locking pin is connected to the second telescopic cylinder, and the third locking pin is connected to the third telescopic cylinder.
According to one aspect of the embodiment of the invention, the plurality of locking holes are tapered holes respectively and are circumferentially spaced and uniformly distributed on the base; in the circumferential direction, the first locking pins, the second locking pins and the third locking pins are distributed at intervals, the first locking pins are arranged adjacent to the second locking pins and form a first included angle with the second locking pins, a second included angle is formed between the first locking pins and the adjacent third locking pins, a third included angle is formed between the second locking pins and the adjacent third locking pins, wherein the second included angle is equal to the third included angle, and the absolute value of the difference value between the second included angle and the first included angle is larger than zero.
According to one aspect of the embodiment of the invention, the sum of the numbers of the first locking pin, the second locking pin and the third locking pin is n, n is more than or equal to 3, the angle value of the first included angle is (360 degrees/n) +2a, and the angle values of the second included angle and the third included angle are (360 degrees/n) -a respectively, wherein a is a constant.
According to one aspect of the embodiment of the invention, the number of the third locking pins is more than two, the sum of the numbers n is more than or equal to 4, a fourth included angle is formed between two adjacent third locking pins in the circumferential direction, and the value of the fourth included angle is 360 degrees/n.
According to an aspect of an embodiment of the present invention, the sum of the numbers of the first locking pins, the second locking pins and the third locking pins is n, and the number of the locking holes is an integer multiple of n.
According to the multi-pin locking hydraulic control system and the wind generating set provided by the embodiment of the invention, the arrangement of the first valve meets the driving of each pin, and the locking or unlocking of the multi-pins is realized. The setting of the second valve enables the first branch to be selectively communicated with the rodless cavity of one of the first telescopic cylinder and the second telescopic cylinder, the second branch to be selectively communicated with the rodless cavity of the other one, and the setting of the third valve can control the second branch to be communicated under preset pressure, so that oil in the oil supply path can enter the rodless cavity of one of the first telescopic cylinder and the second telescopic cylinder through the first branch in advance and be matched with a piece to be locked when the oil supply path is locked, when the oil supply path stretches to a limit position, the pressure rises to the preset pressure of the third valve, the third valve is communicated, and the rodless cavity of the other one of the first telescopic cylinder and the second telescopic cylinder and the rodless cavity of each third telescopic cylinder are communicated with the second branch, so that the oil supply path drives the residual locking pins to stretch out and lock. When the oil supply way is communicated with the unlocking oil way by controlling the first valve, the oil return main way is communicated with the locking oil way, so that the telescopic rods of the telescopic cylinders retract, oil in the rodless cavity is recovered through the oil return branch way and the oil return main way, the orderly work of each locking pin is realized, and the locking or unlocking requirements of parts such as impellers are met.
Drawings
Features, advantages, and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a schematic view of a wind turbine generator system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the structure of a locking system of one embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along the direction A-A in FIG. 2;
FIG. 4 is a cross-sectional view taken along the direction B-B in FIG. 2;
FIG. 5 is a schematic view of a locking system according to another embodiment of the present invention;
FIG. 6 is a cross-sectional view taken along the direction C-C in FIG. 5;
FIG. 7 is a cross-sectional view taken along the direction D-D in FIG. 5;
FIG. 8 is a schematic diagram of a multiple pin lock control system according to one embodiment of the present invention.
Wherein:
1-a locking system;
10-a base; 11-a locking hole;
21-a first locking pin; 22-a second locking pin; 23-a third locking pin;
aA-A first angle; bb-a second included angle; cc-third included angle; dd-fourth included angle;
2-multiple pin locking hydraulic control system; 210-an oil supply path; 211-an oil accommodating box; 212-drive
A device; 220-locking an oil circuit; 221-main oil way; 222-a first leg; 223-second leg; 230-unlocking
An oil path; 240-an oil return main path; 250-an oil return branch; 251-connecting the pipelines; 252-one-way valve; 260-first
A telescopic cylinder; 270-a second telescopic cylinder; 280-a third telescopic cylinder;
2 a-a first valve; p1-oil inlet; t1-an oil return port; a1-a first interface; b1-a second interface;
2 b-a second valve; p2-third interface; t2-fourth interface; a2-a fifth interface; b2-sixth interface;
2 c-a third valve; 2 d-a protection valve;
3-nacelle; a 4-generator; 5-impeller; 501-a hub; 502-leaf; 6-tower;
x-ring direction.
In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.
Detailed Description
Features and exemplary embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order not to unnecessarily obscure the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The directional terms appearing in the following description are all directions shown in the drawings, and do not limit the specific structures of the multi-pin locking hydraulic control system and the wind turbine generator system of the present invention. In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
For a better understanding of the present invention, a multi-pin locking hydraulic control system and a wind turbine generator set according to embodiments of the present invention are described in detail below in connection with fig. 1 to 8.
Referring to fig. 1 to 8, an embodiment of the present invention provides a wind turbine generator system, which includes a first component, a second component, a locking system 1, and a multi-pin locking hydraulic control system 2. The second component is rotatably connected with the first component, the locking system 1 is used for locking the relative positions of the first component and the second component, and the multi-pin locking hydraulic control system 2 is used for controlling the locking system 1 so as to achieve the locking and unlocking requirements of the relative positions of the first component and the second component.
In order to meet the requirement of converting wind energy into electric energy, the wind generating set provided by the embodiment of the invention specifically may include a fan foundation, a tower 6, a nacelle 3, a generator 4, an impeller 5 and a shafting structure (not shown). The tower 6 is arranged at the wind turbine foundation, the nacelle 3 is arranged at the tower 6, and the generator 4 is arranged at the nacelle 3, which may be located inside the nacelle 3, of course, in some examples, outside the nacelle 3. The impeller 5 includes a hub 501 and a plurality of blades 502 connected to the hub 501, the hub 501 of the impeller 5 is connected to the rotor of the generator 4 through a shaft of a shafting structure, and a fixed shaft of the shafting structure can be connected to the stator of the generator 4 and the nacelle 3. When wind force acts on the blades 502, the blades 502 drive the whole impeller 5 to rotate relative to the engine room 3, so that the moving shaft drives the rotor of the generator 4 to rotate relative to the stator, and power generation is realized.
One of the first and second parts comprised by the above mentioned wind power plant may be the impeller 5 and the other the nacelle 3. Of course, in some examples, one of the first and second components is the rotor of the generator 4 and the other is the stator of the generator 4. Alternatively, one of the first and second members may be the axis of the shafting structure and the other the fixed axis of the shafting structure.
Referring to fig. 2 to 8, in order to better meet the locking requirement of the relative positions of the first component and the second component, the locking system 1 of the wind generating set provided by the embodiment of the invention includes a base 10 and a pin assembly, wherein the base 10 may be disposed on the first component, and the pin assembly may be disposed on the second component and face the base 10. The base 10 has a plurality of locking holes 11, and the pin assembly includes a first locking pin 21, a second locking pin 22, and at least one third locking pin 23, which are capable of being respectively insert-fitted with any one of the locking holes 11. The multi-pin locking hydraulic control system 2 is used to control the first, second, and third locking pins 21, 22, and 23 to be inserted into the corresponding locking holes 11 or to be separated from the corresponding locking holes 11 at a predetermined timing.
In some alternative embodiments, the plurality of locking holes 11 are tapered holes, respectively, and are spaced apart and evenly distributed in the circumferential direction X of the base 10. In the circumferential direction X, the first locking pins 21, the second locking pins 22 and the third locking pins 23 are distributed at intervals, the first locking pins 21 and the second locking pins 22 are adjacently arranged and form a first included angle aa with the second locking pins 22, a second included angle bb is formed between the first locking pins 21 and the adjacent third locking pins 23, a third included angle cc is formed between the second locking pins 22 and the adjacent third locking pins 23, wherein the second included angle bb is equal to the third included angle cc, and the absolute value of the difference value between the second included angle bb and the first included angle aa is larger than zero.
Taking the impeller 5 of the wind generating set as an example, the rotation direction of the wind generating set is fixed during working through research, and the analysis of the locking load can find that the larger locking load of the wind generating set is in the same direction except the identifiable working conditions such as single blade 502 hoisting and the like, and the loads in the other opposite directions are very small, so that basically, the requirement can be met by a single locking pin. Based on the above-mentioned study, when the locking system 1 provided by the embodiment of the present invention is used, the base 10 may be disposed on the hub 501 of the impeller 5, and the pin assembly may be disposed on the nacelle 3 opposite to the base 10, and the working process is as follows:
when the locking operation is performed, the first locking pin 21 is aligned with the locking hole 11, the first locking pin 21 is driven by the multi-pin locking hydraulic control system 2 to extend into the corresponding locking hole 11, and the conical sections of the corresponding locking holes 11 of the first locking pin 21 and the base 10 are combined, so that both sides of the base 10 of the first locking pin 21 in the circumferential direction X are in contact with the locking hole 11 to bear force, and the impeller 5 is completely limited in the circumferential direction X in the circumferential direction Xiang Huozhe. Then, the multi-pin locking hydraulic control system 2 is used for controlling the second locking pin 22 and the third locking pin 23 to be inserted into the corresponding locking hole 11, and as the second included angle bb is equal to the third included angle cc and the absolute value of the difference value between the second included angle bb and the first included angle aa is larger than zero, that is, the second included angle bb and the third included angle cc have deviation and the deviation is equal to the deviation between the first included angle aa, and the locking holes 11 are uniformly distributed in the circumferential direction X, the second locking pin 22 and the third locking pin 23 are contacted on the stress side, that is, the single side is stressed due to the deviation after being inserted into the corresponding locking holes 11, and the impeller 5 can be well restrained after all the locking pins are inserted.
As an alternative embodiment, the sum of the numbers of the first, second and third locking pins 21, 22 and 23 is n, and the number of the locking holes 11 is an integer multiple of n. It may be doubled, i.e. the number of locking holes 11 is also n, of course, doubled, tripled or even more, the higher the multiple the wider the locking position of the first and second parts relative to each other.
Taking n equal to 3 as an example, when the number of locking holes 11 is equal to n, the first member and the second member may be locked in one relative position. If the number of the locking holes 11 is twice n, that is, if the number of the locking holes 11 is six, the six locking holes 11 may be divided into two groups, three groups, the deviation of the locking holes 11 between the two groups in the circumferential direction X is 60 °, the first locking pin 21, the second locking pin 22 and the third locking pin 23 may respectively cooperate with the two groups of locking holes 11, so that the first component is locked at two different positions with respect to the second component, and so on, the higher the multiple is, the more the relative lockable positions are.
As an alternative embodiment, the sum of the numbers of the first locking pin 21, the second locking pin 22 and the third locking pin 23 is n.gtoreq.3. The angle value of the first angle aa is (360 °/n) +2a, the angle values of the second angle bb and the third angle cc are (360 °/n) -a, respectively, wherein a is a constant, which may be a positive number, and of course, may be a negative number in some embodiments. Through the arrangement, the relation requirement between the first included angle aa, the second included angle bb and the third included angle cc can be better met, so that whether the locking is performed in the clockwise direction or the anticlockwise direction, the first locking pin 21, the second locking pin 22 and at least one third locking pin 23 can be ensured to play a locking role, and the requirement of multi-pin locking is met.
As an alternative embodiment, the number of the third locking pins 23 is more than two, the sum n of the numbers of the first locking pins 21, the second locking pins 22 and the third locking pins 23 is more than or equal to 4, a fourth included angle dd is formed between two adjacent third locking pins 23 in the circumferential direction X, and the value of the fourth included angle dd is 360 degrees/n. So that whether the locking is performed in the clockwise direction or the anticlockwise direction, the first locking pin 21, the second locking pin 22 and the third locking pins 23 can all play a role in locking, the requirement of multi-pin locking is better met, and the safety and stability requirements of locking are guaranteed.
Illustratively, taking the example when n is equal to 6 and the number of locking holes 11 is equal to n, the angle value of the first included angle aa is 60 ° +2a, the angle values of the second included angle bb and the third included angle cc are 60 ° -a, respectively, and the fourth included angle dd is 60 °.
Taking a as a positive number, when the first component drives the base 10 to rotate clockwise, during locking operation, the first locking pin 21 is aligned with the locking hole 11 first, under the action of the multi-pin locking hydraulic control system 2, the conical sections of the first locking pin 21 and the locking hole 11 are combined, both sides of the first locking pin 21 in the circumferential direction X are contacted with the locking hole 11 to bear force, and at the moment, the base 10 connected with the impeller 5 is completely limited in the circumferential direction X in the circumferential direction Xiang Huozhe, so that the form shown in figure 3 is formed.
The multi-pin locking hydraulic control system 2 can then control the insertion of the second locking pin 22 and the respective third locking pins 23 into the locking holes 11, since in the present invention the angle between the first locking pin 21 and the adjacent third locking pin 23 and the angle between the second locking pin 22 and the adjacent third locking pin 23 are smaller by an angle a with respect to the angle between the corresponding adjacent locking holes 11 at the time of locking, the adjacent third locking pin 23 will be brought close to the contact force of the first locking pin 21 side in the counterclockwise direction due to the deviation of the angle a. Similarly, the remaining third locking pins 23 are in contact on the force side due to the deviation of the angle a. The second locking pin 22 is now in the same way as the rest of the third locking pins 23, also in unilateral contact on the force side, forming the form shown in fig. 4. When all locking pins are inserted, the base 10 is well restrained in the clockwise direction.
Through the arrangement, each locking pin of the pin assembly plays a role in the locking process, and the phenomenon that each locking pin cannot be in plug-in fit with the corresponding locking hole 11 due to machining and assembly errors can be avoided, so that the locking requirement is met.
Referring to fig. 5 to 7, similarly, if the rotation load is in the counterclockwise direction, when the locking operation is performed, the second locking pin 22 is aligned with the corresponding locking hole 11, and the second locking pin 22 is forced to contact the locking hole 11 on both sides by combining the tapered sections of the second locking pin 22 and the corresponding locking hole 11 under the pushing of the multi-pin locking hydraulic control system 2, so that the base 10 to which the impeller 5 is connected is completely limited in the circumferential direction. The multi-pin locking hydraulic control system 2 may then control the insertion of the first locking pin 21 and the respective third locking pin 23 into the locking hole 11, achieving multi-pin locking in a counter-clockwise direction.
In some alternative embodiments, the absolute value of a of the locking system 1 provided in each of the above embodiments may be any value between 0.02 ° and 2 °, including two end values of 0.02 ° and 2 °. In some alternative embodiments, any value between 0.03 ° and 1 ° may be selected, and still more preferably about 0.05 °. Through the arrangement, errors caused by machining and assembling can be reliably absorbed, meanwhile, when one of the first locking pins 21 and the second locking pins 22 is stressed on two sides in the circumferential direction X, the other of the remaining first locking pins 21 and the second locking pins 22 and each third locking pin 23 can be stressed on one side in the stress direction, multi-pin locking is achieved, and safety is guaranteed.
It should be noted that the above and below mentioned double-sided stress of the present invention means that the corresponding locking pins contact the wall of the corresponding locking hole 11 at both sides of the circumferential direction X. The unilateral stress means that the corresponding locking pin is in contact with the wall of the corresponding locking hole 11 at one side in the circumferential direction X.
Referring to fig. 2 to 8, in order to better control the locking system 1 of the wind turbine generator system provided in the above embodiments, the embodiment of the present invention further provides a new multi-pin locking hydraulic control system 2, which includes an oil supply path 210, a locking oil path 220, an unlocking oil path 230, an oil return main path 240, an oil return branch path 250, a first telescopic cylinder 260, a second telescopic cylinder 270, and at least one third telescopic cylinder 280.
The oil supply passage 210 selectively communicates with one of the lock oil passage 220 and the unlock oil passage 230 through a first valve 2a, and the oil return main passage 240 selectively communicates with the other of the lock oil passage 220 and the unlock oil passage 230 through the first valve 2 a.
The locking oil passage 220 includes a first branch 222 and a second branch 223, the first branch 222 is connected to the rodless chambers of the first and second telescopic cylinders 260 and 270, the second branch 223 is connected to the rodless chambers of the first and second telescopic cylinders 260 and 270 and the respective third telescopic cylinders 280, the locking oil passage 220 is provided with a second valve 2b and a third valve 2c, and the second valve 2b controls the first branch 222 to selectively communicate with the rodless chamber of one of the first and second telescopic cylinders 260 and 270 and the second branch 223 to selectively communicate with the rodless chamber of the other. The third valve 2c controls the second branch 223 to be turned on at a predetermined pressure. The rod cavities of the first telescopic cylinder 260, the second telescopic cylinder 270 and the third telescopic cylinder 280 are all connected to the unlocking oil path 230, and the oil return branch 250 is connected to the first branch 222 and the second branch 223 and is conducted unidirectionally from the second branch 223 to the first branch 222.
The locking system 1 of the wind generating set provided by the embodiment of the invention can enable the first locking pin 21 to be connected with the cylinder rod of the first telescopic cylinder 260, the second locking pin 22 to be connected with the cylinder rod of the second telescopic cylinder 270, and each third locking pin 23 to be connected with the cylinder rod of one third telescopic cylinder 280 when being applied to the wind generating set and used for driving the locking system 1.
Since the oil supply passage 210 selectively communicates with one of the lock oil passage 220 and the unlock oil passage 230 through a first valve 2a, the oil return main passage 240 selectively communicates with the other of the lock oil passage 220 and the unlock oil passage 230 through the first valve 2 a. When the pin assembly requires the lock base 10, the oil supply passage 210 may be made to communicate with the lock oil passage 220 through the first valve 2a, and the oil return main passage 240 may be made to communicate with the unlock oil passage 230 through the first valve 2 a. The oil in the oil supply path 210 enters the first telescopic cylinder 260, the second telescopic cylinder 270 and the third telescopic cylinder 280 according to a preset time sequence through the locking oil path 220, so that the cylinder rod of each telescopic cylinder extends out, and the corresponding first locking pin 21, second locking pin 22 and third locking pin 23 are driven to be inserted into the corresponding locking hole 11 of the base 10 according to the preset time sequence, so that locking is realized.
The second valve 2b is arranged such that the first branch 222 is selectively communicable with the rodless chamber of one of the first telescopic cylinder 260 and the second telescopic cylinder 270, and the second branch 223 is selectively communicable with the rodless chamber of the other. And the third valve 2c is configured to control the second branch 223 to be connected under a predetermined pressure, so that during the locking operation, the oil in the oil supply path 210 may first enter the rodless cavity of one of the first telescopic cylinder 260 and the second telescopic cylinder 270 through the first branch 222, so that the oil is pre-extended and matched with the corresponding locking hole of the base 10, and both sides of the ring direction X are contacted with the corresponding locking hole 11, so that the base 10 is completely limited. When the expansion and contraction is to the limit position, the pressure rises to the preset pressure of the third valve 2c, and the third valve 2c is turned on, so that the other of the first expansion cylinder 260 and the second expansion cylinder 270 and the rodless chamber of each third expansion cylinder 280 are communicated with the second branch 223, and the extension locking of the remaining locking pins is completed. The primary and secondary switching of the first locking pin 21 and the second locking pin 22 can be achieved to accommodate both clockwise and counter-clockwise, and the first locking pin 21, the second locking pin 22 and the third locking pins 23 can all simultaneously perform locking functions.
When unlocking is needed, the oil supply path 210 is communicated with the unlocking oil path 230 through the first valve 2a, the oil return main path 240 is communicated with the locking oil path 220 through the first valve 2a, so that oil enters the rod cavity of each telescopic cylinder through the unlocking oil path 230, and the cylinder rod of each telescopic cylinder drives the corresponding locking pin to retract and is separated from the corresponding locking hole 11, so that unlocking is realized. The oil in the rodless cavity of each telescopic cylinder passes through the oil return branch 250, the locking oil way 220 and returns to the oil return main way 240.
As an alternative embodiment, the first valve 2a is switchable between a first switching position in which the lock oil passage 220 communicates with the oil supply passage 210 and a second switching position in which the unlock oil passage 230 communicates with the return oil main passage 240. In the second change position, the lock oil passage 220 communicates with the return oil main passage 240, and the unlock oil passage 230 communicates with the oil supply passage 210. The first valve 2a is configured as described above, so that the connection between the oil supply path 210 and the oil return main path 240 and the lock oil path 220 and the unlock oil path 230 can be switched, and the locking and unlocking requirements of the lock system 1 can be controlled by the first valve 2 a.
In some alternative embodiments, the first valve 2a is a three-position four-way reversing valve, which may be a three-position four-way electromagnetic reversing valve, and is easy to control. The first valve 2a includes an oil inlet P1, an oil return port T1, a first port A1, and a second port B1. The oil inlet P1 is connected to the oil supply path 210, the oil return port T1 is connected to the oil return main path 240, the first port A1 is connected to the lock oil path 220, and the second port B1 is connected to the unlock oil path 230. When the end B of the first valve 2a is powered on, the first valve 2a is in a first exchange position, the oil inlet P1 is communicated with the first interface A1, and the oil return port T1 is communicated with the second interface B1. When the end a of the first valve 2a is powered on, the first valve 2a is in a second exchange position, the oil inlet P1 is communicated with the second interface B1, the oil return port T1 is communicated with the first interface A1, and the locking and unlocking requirements of the locking system 1 are switched.
As an alternative embodiment, the second valve 2b is switchable between a third commutation position, in which the first branch 222 communicates with the rodless cavity of the first telescopic cylinder 260, and a fourth commutation position, in which the second branch 223 communicates with the rodless cavity of the second telescopic cylinder 270. In the fourth shift position, the first leg 222 communicates with the rodless cavity of the second telescopic cylinder 270 and the second leg 223 communicates with the rodless cavity of the first telescopic cylinder 260. The second valve 2b adopts the above-mentioned structure, can switch one of the first telescopic cylinder 260 and the second telescopic cylinder 270 to communicate with the first branch 222 according to the preset requirement, and can push out the oil liquid entering through the first branch 222 by the first locking pin 21 or the second locking pin 22 in advance according to the locking requirement, such as the locking requirement of the first component connected with the base 10 in the clockwise direction or the anticlockwise direction, and contact and bear force with the locking holes 11 on both sides of the base 10 in the circumferential direction X, and at this time, the base 10 is completely limited in the circumferential direction. Then, after the locking oil path 220 is continuously pressurized to the preset pressure of the third valve 2c, the third valve 2c is communicated, so that the second branch 223 is communicated, hydraulic oil can enter the other of the first telescopic cylinder 260 and the second telescopic cylinder 270 and each third telescopic cylinder 280 through the second branch 223, so that each remaining locking pin is inserted into the corresponding locking hole 11, and the multi-pin locking requirement is realized.
As an alternative embodiment, the second valve 2b is a two-position four-way reversing valve, alternatively, the second valve 2b may be a manual reversing valve, and of course, may also be an electromagnetic reversing valve. The second valve 2B includes a third port P2, a fourth port T2, a fifth port A2, and a sixth port B2, the third port P2 is connected to the second branch 223, the fourth port T2 is connected to the first branch 222, the fifth port A2 is connected to the rodless chamber of the first telescopic cylinder 260, and the sixth port B2 is connected to the rodless chamber of the second telescopic cylinder 270. The second valve 2B is in the initial state in the fourth shift position, the third port P2 communicates with the fifth port A2, and the fourth port T2 communicates with the sixth port B2. The second valve 2B may be driven manually or driven electrically such that the second valve 2B is switched to a third switching position in which the third port P2 communicates with the sixth port B2 and the fourth port T2 communicates with the fifth port A2. So as to realize the control that the first locking pin 21 or the second locking pin 22 is inserted into the corresponding locking hole 11 of the base 10 first, and the base 10 is locked in the circumferential direction X in advance.
As an alternative implementation manner, in the multi-pin locking hydraulic control system 2 provided in the embodiment of the present invention, the locking oil circuit 220 further includes a main oil circuit 221, the locking oil circuit 220 is connected to the first valve 2a through the main oil circuit 221, and the first branch 222 and the second branch 223 are respectively connected to the main oil circuit 221. Through the arrangement, the communication switching between the oil supply passage 210 and the locking oil passage 220 or the unlocking oil passage 230 is realized through the first valve 2a, and the control system is simplified.
In some alternative embodiments, the pin locking hydraulic control system provided by the embodiments of the present invention, the third valve 2c may be a sequence valve and disposed in the second branch 223. The control of the action sequence of each telescopic cylinder can be facilitated, so that when the pin assembly of the locking system 1 is controlled to lock the base 10, one of the first telescopic cylinder 260 and the second telescopic cylinder 270 can be better inserted into the locking hole 11 in advance, and then the other one of the first telescopic cylinder 260 and the second telescopic cylinder 270 and each third telescopic cylinder 280 can be ensured to be synchronously inserted into the corresponding locking hole 11 to carry out unilateral locking of the stress direction under the action of the third valve 2c, so that the driving requirement of multi-pin locking is met.
As an alternative implementation manner, the multi-pin locking hydraulic control system 2 provided in the above embodiments of the present invention is further provided with a protection valve 2d on the second branch 223, where the protection valve 2d breaks the second branch 223 when the pressure of the second branch 223 exceeds a preset pressure. Through the above arrangement, when the multi-pin locking hydraulic control system 2 controls the plurality of locking pins to be fully inserted into the corresponding locking holes 11, the pressure in the locking oil passage 220 can be prevented from continuously rising, and the safety performance of the multi-pin locking hydraulic control system 2 is ensured. Alternatively, the protection valve 2d may be a pressure reducing valve, so that the safety performance of the multi-pin locking hydraulic control system 2 can be effectively ensured.
As an alternative implementation manner, in the multi-pin locking hydraulic control system 2 provided in the embodiment of the present invention, the oil return branch 250 includes a communication pipe 251 and a check valve 252 disposed in the communication pipe 251, one end of the communication pipe 251 is communicated with the first branch 222, the other end of the communication pipe 251 is communicated with the second branch 223 and is located downstream of the protection valve 2d, and the check valve 252 is in unidirectional conduction from one end communicated with the communication pipe 251 and the second branch 223 to one end communicated with the first branch 222. Through the arrangement, when the multi-pin locking hydraulic control system 2 controls the plurality of locking pins to be far away from the corresponding locking holes 11, oil in the rodless cavity of each locking pin can be recovered through the locking oil way 220, the oil return branch 250 and the oil return main way 240, and the unlocking requirement is met.
As an alternative implementation manner, the oil supply path 210 provided in the embodiment of the present invention includes an oil accommodating tank 211 and a driver 212, where the driver 211 is disposed in the oil accommodating tank 212 and is in communication with the first valve 2a, and an end of the oil return main path 240 facing away from the first valve 2a is in communication with the oil accommodating tank 212. Can meet the pumping and recovery of oil and ensure the driving requirement.
In order to better understand the embodiment of the present invention, the operation of the multi-pin locking hydraulic control system 2 provided in the embodiment of the present invention will be described below by taking the locking impeller 5 as an example.
1. According to the load of the impeller 5, the first locking pin 21 is determined as a main locking pin, and the impeller 5 is locked:
controlling the first, second and third telescopic cylinders 260, 270 and 280 to be all retracted;
the second valve 2B is commutated to a third commutation position such that the fourth port T2 of the second valve 2B communicates with the fifth port A2 and the third port P2 communicates with the sixth port B2. Meanwhile, the B end of the first valve 2a is controlled to be electrified, so that the oil inlet P1 of the first valve 2a is communicated with the first interface A1, the oil return port T1 is communicated with the second interface B1, the oil supply path 210 is communicated with the locking oil path 220, and the oil return main path 240 is communicated with the unlocking oil path 230.
The driver 212 of the oil supply path 210 is started, so that oil enters the locking oil path 220 through the oil inlet P1 and the first interface A1 of the first valve 2a, sequentially passes through the main oil path 221 and the first branch 222 of the locking oil path 220, then enters the rodless cavity of the first telescopic cylinder 260 through the fourth interface T2 and the fifth interface A2 of the second valve 2b, pushes the cylinder rod of the first telescopic cylinder 260 to drive the first locking pin 21 to extend, and is inserted into the corresponding locking hole 11 hole on the base 10, so that bidirectional locking of the base 10 in the circumferential direction X is realized. In this process, the oil in the rod chamber of the first telescopic cylinder 260 returns to the oil return main passage 240 through the unlock oil passage 230 and the second port B1 and the oil return port T1 of the first valve 2 a.
When the first locking pin 21 reaches the final locking position, the first telescopic cylinder 260 stops moving, the oil continues to be driven from the driver 212, the pressure of the oil in the locking oil passage 220 increases continuously, and when the pressure reaches the preset pressure of the third valve 2c, the third valve 2c is turned on, so that the second branch 223 is turned on. The oil flows through the third valve 2c and the protection valve 2d through the main oil line 221 and the second branch 223, one part of the oil enters the rodless cavity of the second telescopic cylinder 270 through the third port P2 and the sixth port B2 of the second valve 2B, and the other part of the oil flows into the rodless cavity of each third telescopic cylinder 280, so that the cylinder rod of the second telescopic cylinder 270 drives the second locking pin 22 and the cylinder rod of each third telescopic cylinder 280 drives the third locking pin 23 to enter the corresponding locking hole 11 respectively, and the unilateral locking in the stress direction is realized. In this process, the oil in the rod chambers of the second telescopic cylinder 270 and the third telescopic cylinders 280 is returned to the oil return main passage 240 through the unlock oil passage 230, the second port B1 of the first valve 2a, and the oil return port T1. When the second lock pin 22 and each third lock pin 23 reach the lock position, the movement is stopped, the oil pressure in the lock oil passage 220 starts to rise, and when the pressure value rises to the set value of the protection valve 2d, the protection valve 2d operates, cutting off the oil passage, and preventing the second lock pin 22 and each third lock pin 23 from rising further. At this point the locking process is completed.
2. According to the load of the impeller 5, the first locking pin 21 is determined as a main locking pin, and the unlocking process of the impeller 5 is performed.
When unlocking, the end a of the first valve 2a is electrified, the first valve 2a is in a second exchange position, the oil inlet P1 of the first valve 2a is communicated with the second interface B1, the oil return port T1 is communicated with the first interface A1, the oil supply path 210 is communicated with the unlocking oil path 230, and the oil return main path 240 is communicated with the locking oil path 220. Under the action of the driver 212 of the oil supply path 210, oil enters the unlocking oil path 230 through the oil inlet P1 and the second interface B1 of the first valve 2a, flows into rod cavities of the first locking pin 21, the second locking pin 22 and the third locking pins 23 through the unlocking oil path 230, and the cylinder rods of the telescopic cylinders drive the corresponding locking pins to retract, so that the first locking pins 21, the second locking pins 22 and the third locking pins 23 are separated from the locking holes 11 on the base 10, and the oil in the rodless cavities of the telescopic cylinders returns to the oil return main path 240 through the oil return branch 250, the locking oil path 220 and the first interface A1 and the oil return port T1 of the first valve 2a, thereby completing unlocking.
3. According to the load of the impeller 5, the second locking pin 22 is determined as a main locking pin, and the impeller 5 is locked:
the locking process is substantially the same as the above-described locking process in which the first locking pin 21 is determined to be the main locking pin, except that in the locking process, the second valve 2B may be previously placed in an initial state, i.e., a fourth change of position, the first branch 222 communicates with the rodless chamber of the second telescopic cylinder 270 through the fourth port T2 and the sixth port B2 of the second valve 2B, and the second branch 223 communicates with the rodless chamber of the first telescopic cylinder 260 through the third port P2 and the fifth port A2 of the second valve 2B. So that when locking, the cylinder rod of the second telescopic cylinder 270 drives the second locking pin 22 to be inserted into the corresponding locking hole 11 on the base 10, thereby realizing bidirectional locking of the base 10 in the circumferential direction X. Then, when the third valve 2c exceeds the preset pressure, the second branch 223 drives the cylinder rod of the first telescopic cylinder 260 and each third telescopic cylinder 280 to drive the first locking pin 21 and each third locking pin 23 to be inserted into the corresponding locking hole 11 so as to realize locking.
4. According to the load of the impeller 5, the second locking pin 22 is determined to be a main locking pin, and the unlocking process of the impeller 5 and the unlocking process of the first locking pin 21 are performed as the main locking pin, which are not repeated here.
Therefore, the multi-pin locking hydraulic control system 2 provided by the embodiment of the invention can connect and control a plurality of locking pins, realize orderly work of each locking pin and meet the locking and unlocking requirements of parts such as the impeller 5. The wind generating set provided by the embodiment of the invention can meet the requirement of locking each locking pin according to the preset locking sequence because the wind generating set comprises the multi-pin locking hydraulic control system 2 provided by the embodiments, and has higher safety performance because the wind generating set comprises the locking system 1.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (15)
1. A multiple pin locking hydraulic control system (2), comprising: an oil supply path (210), a locking path (220), an unlocking path (230), an oil return main path (240), an oil return branch path (250), a first telescopic cylinder (260), a second telescopic cylinder (270) and at least one third telescopic cylinder (280);
the oil supply passage (210) selectively communicates with one of the lock oil passage (220) and the unlock oil passage (230) through a first valve (2 a), and the oil return main passage (240) selectively communicates with the other of the lock oil passage (220) and the unlock oil passage (230) through the first valve (2 a);
the locking oil circuit (220) comprises a first branch circuit (222) and a second branch circuit (223), the first branch circuit (222) is connected with rodless cavities of the first telescopic cylinder (260) and the second telescopic cylinder (270), the second branch circuit (223) is connected with rodless cavities of the first telescopic cylinder (260), the second telescopic cylinder (270) and the third telescopic cylinders (280), a second valve (2 b) and a third valve (2 c) are arranged on the locking oil circuit (220), the second valve (2 b) controls the first branch circuit (222) to be selectively communicated with the rodless cavity of one of the first telescopic cylinder (260) and the second telescopic cylinder (270) and the second branch circuit (223) to be selectively communicated with the rodless cavity of the other, and the third valve (2 c) controls the second branch circuit (223) to be communicated under a preset pressure;
The rod cavities of the first telescopic cylinder (260), the second telescopic cylinder (270) and the third telescopic cylinder (280) are connected to the unlocking oil way (230), and the oil return branch (250) is connected with the first branch (222) and the second branch (223) and is in one-way conduction from the second branch (223) to the first branch (222).
2. The multiple pin locking hydraulic control system (2) according to claim 1, characterized in that the first valve (2 a) is switchable between a first switching position, in which the locking oil passage (220) communicates with the oil supply passage (210), and a second switching position, in which the unlocking oil passage (230) communicates with the oil return main passage (240), and in which the locking oil passage (220) communicates with the oil return main passage (240), and in which the unlocking oil passage (230) communicates with the oil supply passage (210).
3. The multi-pin locking hydraulic control system (2) according to claim 2, wherein the first valve (2 a) is a three-position four-way reversing valve, the first valve (2 a) comprises an oil inlet (P1), an oil return port (T1), a first interface (A1) and a second interface (B1), the oil inlet (P1) is connected with the oil supply path (210), the oil return port (T1) is connected with the oil return main path (240), the first interface (A1) is connected with the locking oil path (220), and the second interface (B1) is connected with the unlocking oil path (230).
4. The multiple pin locking hydraulic control system (2) of claim 1, wherein the second valve (2 b) is switchable between a third commutation position in which the first branch (222) communicates with the rodless cavity of the first telescopic cylinder (260), the second branch (223) communicates with the rodless cavity of the second telescopic cylinder (270), and a fourth commutation position in which the first branch (222) communicates with the rodless cavity of the second telescopic cylinder (270), the second branch (223) communicates with the rodless cavity of the first telescopic cylinder (260).
5. The multiple pin locking hydraulic control system (2) of claim 4, wherein the second valve (2B) is a two-position four-way reversing valve, the second valve (2B) comprises a third port (P2), a fourth port (T2), a fifth port (A2) and a sixth port (B2), the third port (P2) is connected with the second branch (223), the fourth port (T2) is connected with the first branch (222), the fifth port (A2) is connected with a rodless chamber of the first telescopic cylinder (260), and the sixth port (B2) is connected with a rodless chamber of the second telescopic cylinder (270).
6. The multiple pin locking hydraulic control system (2) according to claim 1, characterized in that the locking oil passage (220) further includes a main oil passage (221), the locking oil passage (220) being connected to the first valve (2 a) through the main oil passage (221), the first branch passage (222) and the second branch passage (223) being connected to the main oil passage (221), respectively.
7. The multiple pin locking hydraulic control system (2) of claim 1, wherein the third valve (2 c) is a sequence valve and is arranged in the second branch (223).
8. The multi-pin locking hydraulic control system (2) according to claim 1, characterized in that a protection valve (2 d) is further provided on the second branch (223), which protection valve (2 d) disconnects the second branch (223) when the pressure of the second branch (223) exceeds a preset pressure.
9. The multiple pin locking hydraulic control system (2) of claim 8, wherein the oil return branch (250) includes a communication line (251) and a check valve (252) provided to the communication line (251), one end of the communication line (251) communicates with the first branch (222), the other end of the communication line (251) communicates with the second branch (223) and is located downstream of the protection valve (2 d), and the check valve (252) is in one-way communication from one end of the communication line (251) communicating with the second branch (223) to one end of the communication line (251) communicating with the first branch (222).
10. The multiple pin locking hydraulic control system (2) of claim 1, wherein the oil supply path (210) includes an oil containing tank (211) and a driver (212), the driver (212) is disposed in the oil containing tank (211) and communicates with the first valve (2 a), and an end of the oil return main path (240) facing away from the first valve (2 a) communicates with the oil containing tank (211).
11. A wind turbine generator set, comprising:
a first part and a second part which are connected in a rotating way;
a locking system (1) comprising a base (10) and a pin assembly, the base (10) being arranged on the first part, the pin assembly being arranged on the second part and facing the base (10), the base (10) having a plurality of locking holes (11), the pin assembly comprising a first locking pin (21), a second locking pin (22) and at least one third locking pin (23) which can be respectively in plug-in fit with any of the locking holes (11);
the multiple pin locking hydraulic control system (2) of any one of claims 1 to 10, the first locking pin (21) being connected to the first telescopic cylinder (260), the second locking pin (22) being connected to the second telescopic cylinder (270), the third locking pin (23) being connected to the third telescopic cylinder (280).
12. Wind power unit according to claim 11, characterized in that a plurality of said locking holes (11) are respectively conical holes and are spaced apart and evenly distributed in the circumferential direction (X) of said foundation (10);
the first locking pins (21), the second locking pins (22) and the third locking pins (23) are distributed at intervals, the first locking pins (21) are arranged adjacent to the second locking pins (22) and form a first included angle (aa) with the second locking pins (22), a second included angle (bb) is formed between the first locking pins (21) and the adjacent third locking pins (23), a third included angle (cc) is formed between the second locking pins (22) and the adjacent third locking pins (23), and the second included angle (bb) is equal to the third included angle (cc) and the absolute value of the difference value between the second included angle (bb) and the first included angle (aa) is larger than zero.
13. The wind power plant according to claim 12, wherein the sum of the number of the first locking pins (21), the second locking pins (22) and the third locking pins (23) is n, n being equal to or larger than 3, the angle value of the first included angle (aa) is (360 °/n) +2a, the angle values of the second included angle (bb) and the third included angle (cc) are (360 °/n) -a, respectively, wherein a is a constant.
14. Wind turbine generator system according to claim 13, wherein the number of third locking pins (23) is more than two, the sum n being equal to or larger than 4, a fourth angle (dd) being formed between two adjacent third locking pins (23) in the circumferential direction (X), the fourth angle (dd) having a value of 360 °/n.
15. Wind power unit according to claim 12, characterized in that the sum of the number of the first locking pins (21), the second locking pins (22) and the third locking pins (23) is n and the number of the locking holes (11) is an integer multiple of n.
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