CN109595129B - Impeller locking hydraulic system and wind generating set - Google Patents
Impeller locking hydraulic system and wind generating set Download PDFInfo
- Publication number
- CN109595129B CN109595129B CN201811522590.9A CN201811522590A CN109595129B CN 109595129 B CN109595129 B CN 109595129B CN 201811522590 A CN201811522590 A CN 201811522590A CN 109595129 B CN109595129 B CN 109595129B
- Authority
- CN
- China
- Prior art keywords
- oil
- cylinder
- reversing valve
- oil cylinder
- port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 claims description 18
- 230000001276 controlling effect Effects 0.000 claims description 11
- 239000003921 oil Substances 0.000 description 250
- 239000010720 hydraulic oil Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 238000010248 power generation Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The invention provides an impeller locking hydraulic system and a wind generating set, wherein the impeller locking hydraulic system comprises: the first oil cylinder comprises a rod cavity and a rodless cavity; the second oil cylinder comprises a rod cavity and a rodless cavity; the oil pressure adjusting unit is arranged on an oil supply path of the rodless cavity of the first oil cylinder and is in one-way conduction in the oil supply direction; the oil passage connected with the inlet of the oil pressure regulating unit is provided with a branching point which is connected with an oil supply path of the rodless cavity of the second oil cylinder. The impeller locking hydraulic system according to the embodiment of the invention can prevent the locking pin from being blocked. The impeller locking hydraulic system provided by the embodiment of the invention can reduce the operation flow, reduce the complexity of the system and improve the reliability of the system.
Description
Technical Field
The invention belongs to the field of wind power generation, and particularly relates to an impeller locking hydraulic system of a wind generating set and the wind generating set.
Background
Wind power plants generally comprise blades, a hub, a nacelle, a tower, a base and other parts, and when the wind power plant needs personnel to enter the hub for maintenance or related operations, the impeller (blades and hub) needs to be locked so as to ensure the safety of the personnel entering the hub. In addition, when the wind generating set normally operates, locking of the impeller needs to be released, so that the impeller locking hydraulic system is an important component of the wind generating set.
Specifically, when a worker needs to enter the hub for operation, the impeller locking hydraulic system is used for controlling the locking pin to lock the impeller, so that the impeller cannot rotate, and the personal safety of the worker is ensured.
For large megawatt units, a double impeller locking pin is generally required for safety, however, when locking of the impellers of the wind turbine unit is required, if the locking pins of the cylinders are simultaneously extended and/or simultaneously retracted, the locking pins may be blocked. In addition, if the locking pin having a large resistance force is forcibly retracted first, the locking pin may be blocked.
Besides the defect that the locking pin is blocked, the existing impeller locking hydraulic system has the defects that misoperation is easy to occur due to complicated working logic and operation flow, and the system reliability is affected due to the fact that the hydraulic system is complex, the number of hydraulic parts and electric control elements is large, the number of potential failure points is large, and the like.
Disclosure of Invention
One of the purposes of the invention is to effectively prevent the locking pin of the oil cylinder from being blocked.
According to an aspect of the present invention, an impeller lock hydraulic system of a wind turbine generator includes: the first oil cylinder comprises a rod cavity and a rodless cavity; the second oil cylinder comprises a rod cavity and a rodless cavity; the oil pressure adjusting unit is arranged on an oil supply path of the rodless cavity of the first oil cylinder and is in one-way conduction in the oil supply direction; the oil passage connected with the inlet of the oil pressure regulating unit is provided with a branching point which is connected with an oil supply path of the rodless cavity of the second oil cylinder.
According to an embodiment of the present invention, the impeller lock hydraulic system may further include a reversing valve unit connected between the hydraulic source and the inlet of the oil pressure adjusting unit, wherein the rod chamber of the first cylinder and the rod chamber of the second cylinder are connected with the reversing valve unit to form an oil return path from the rod chamber of the first cylinder to the oil collecting unit and from the rod chamber of the second cylinder to the oil collecting unit.
According to an embodiment of the present invention, the oil pressure regulating unit may include a first sequence valve, an inlet of which may be in communication with an output end of the reversing valve unit, and a relief valve, an outlet of which may be in communication with an inlet of the relief valve, and an outlet of which may be in communication with a rodless chamber of the first cylinder.
According to an embodiment of the present invention, the first output port of the output end may be in direct communication with the rodless cavity of the second cylinder, the second output port of the output end may be in direct communication with the rod cavity of the first cylinder, and the second output port may be in direct communication with the rod cavity of the second cylinder.
According to the embodiment of the invention, the reversing valve unit can be a three-position four-way reversing valve, the P port and the T port of the three-position four-way reversing valve can be positioned at the input end, and the A port and the B port of the three-position four-way reversing valve can be positioned at the output end.
According to an embodiment of the present invention, a first pressure relay may be installed on the oil supply and return path of the rodless chamber of the first cylinder, and a second pressure relay may be installed on the oil supply and return path of the rod-containing chamber of the second cylinder.
According to an embodiment of the present invention, a first check valve may be installed between the oil supply and return path of the rodless chamber of the first cylinder and the oil supply and return path of the rodless chamber of the second cylinder.
According to the embodiment of the invention, the oil supply path of the rod cavity of the second oil cylinder can be provided with a second sequence valve, and the oil supply and return path of the rod cavity of the second oil cylinder and the oil supply and return path of the rod cavity of the first oil cylinder can be provided with a second one-way valve.
According to an embodiment of the present invention, the impeller lock hydraulic system may further comprise a control unit controlling the power supply of the three-position four-way reversing valve, the control unit being configured to: when the impeller locking hydraulic system locks the impeller, controlling to supply power to the three-position four-way reversing valve, so that a P port and an A port of the three-position four-way reversing valve are communicated, and a T port and a B port of the three-position four-way reversing valve are communicated, thereby forming a first oil supply path for supplying oil to a rodless cavity of a first oil cylinder, a second oil supply path for supplying oil to a rodless cavity of a second oil cylinder, a first oil return path for releasing oil in a rod cavity of the first oil cylinder, and a second oil return path for releasing oil in a rod cavity of the second oil cylinder; when the impeller locking hydraulic system unlocks the impeller, controlling to supply power to the three-position four-way reversing valve, so that a P port and a B port of the three-position four-way reversing valve are communicated, and a T port and an A port are communicated, thereby forming a third oil supply path for supplying oil to a rod cavity of the first oil cylinder and a fourth oil supply path for supplying oil to a rod cavity of the second oil cylinder, and a third oil return path for releasing oil in a rodless cavity of the first oil cylinder and a fourth oil return path for releasing oil in a rodless cavity of the second oil cylinder; the first oil supply path sequentially passes through the three-position four-way reversing valve, the first sequence valve, the pressure reducing valve and the rodless cavity of the first oil cylinder, the second oil supply path sequentially passes through the three-position four-way reversing valve and the rodless cavity of the second oil cylinder, the third oil supply path sequentially passes through the three-position four-way reversing valve and the rodless cavity of the first oil cylinder, the fourth oil supply path sequentially passes through the three-position four-way reversing valve and the rodless cavity of the second oil cylinder, the first oil return path sequentially passes through the rod cavity of the first oil cylinder and the three-position four-way reversing valve, the second oil return path sequentially passes through the rodless cavity of the second oil cylinder, the first one-way valve and the three-position four-way reversing valve, and the fourth oil return path sequentially passes through the rodless cavity of the second oil cylinder and the three-position four-way reversing valve.
According to an embodiment of the present invention, the impeller lock hydraulic system may further comprise a control unit controlling the power supply of the three-position four-way reversing valve, the control unit being configured to: when the impeller locking hydraulic system locks the impeller, controlling to supply power to the three-position four-way reversing valve, so that a P port and an A port of the three-position four-way reversing valve are communicated, and a T port and a B port of the three-position four-way reversing valve are communicated, thereby forming a first oil supply path for supplying oil to a rodless cavity of a first oil cylinder, a second oil supply path for supplying oil to a rodless cavity of a second oil cylinder, a first oil return path for releasing oil in a rod cavity of the first oil cylinder, and a fifth oil return path for releasing oil in the rod cavity of the second oil cylinder; when the impeller locking hydraulic system unlocks the impeller, controlling to supply power to the three-position four-way reversing valve, so that a P port and a B port of the three-position four-way reversing valve are communicated, and a T port and an A port are communicated, thereby forming a third oil supply path for supplying oil to a rod cavity of the first oil cylinder and a fifth oil supply path for supplying oil to a rod cavity of the second oil cylinder, and a third oil return path for releasing oil in a rodless cavity of the first oil cylinder and a fourth oil return path for releasing oil in a rodless cavity of the second oil cylinder; the first oil supply path sequentially passes through the three-position four-way reversing valve, the first sequence valve, the pressure reducing valve and the rodless cavity of the first oil cylinder, the second oil supply path sequentially passes through the three-position four-way reversing valve and the rodless cavity of the second oil cylinder, the third oil supply path sequentially passes through the three-position four-way reversing valve and the rod cavity of the first oil cylinder, the fifth oil supply path sequentially passes through the three-position four-way reversing valve, the second sequence valve and the rod cavity of the second oil cylinder, the first oil return path sequentially passes through the rod cavity of the first oil cylinder, the second one-way valve and the three-position four-way reversing valve, the fifth oil return path sequentially passes through the rodless cavity of the first oil cylinder, the first one-way valve and the three-position four-way reversing valve, and the fourth oil return path sequentially passes through the rodless cavity of the second oil cylinder and the three-position four-way reversing valve.
According to another aspect of the invention, a wind power plant comprises the impeller locking hydraulic system described above.
According to the impeller locking hydraulic system provided by the embodiment of the invention, the locking pin of the oil cylinder can be prevented from being blocked.
According to the impeller locking hydraulic system provided by the embodiment of the invention, the operation flow can be reduced, the complexity of the system is reduced, and the reliability of the system is improved.
The impeller locking hydraulic system provided by the embodiment of the invention is simple in structure and low in cost, and brings great convenience to maintenance of the wind generating set.
Drawings
These and/or other aspects and advantages of the present invention will become apparent from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic, schematic illustration of an impeller lock hydraulic system according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of an impeller lock hydraulic system according to a second embodiment of the present invention;
Fig. 3 is a schematic diagram of an impeller lock hydraulic system according to a third embodiment of the invention.
Reference numerals:
1: a hydraulic source; 2: an oil collecting unit; 40: a reversing valve unit; 31: a first sequence valve; 32: a pressure reducing valve; 30: an oil pressure adjusting unit; 61: a first pressure relay; 50: a first one-way valve; 10: a first cylinder; 20: a second cylinder; 62: a second pressure relay; a1, A2: a rodless cavity; b1 and B2: a rod cavity is arranged;
70: a second one-way valve; 80: a second sequence valve;
3: a first electromagnetic valve; 4: a second electromagnetic valve; 5: a third one-way valve; 6: a third sequence valve; 41: three-position four-way reversing valve.
Detailed Description
Preferred embodiments of the present invention will hereinafter be described in conjunction with the appended drawings, wherein like numerals denote like elements throughout.
Fig. 1 is a schematic diagram of an impeller lock hydraulic system according to a first embodiment of the invention.
The vane lock hydraulic system of the present invention may include the first and second cylinders 10 and 20, and the oil pressure adjusting unit 30.
The first cylinder 10 may include a rodless chamber A1 and a rod-containing chamber B1, and the second cylinder 20 may include a rodless chamber A2 and a rod-containing chamber B2, and the rod-containing chambers B1 and B2 may be installed with locking pins that are extended or retracted by a pressure difference between the rodless chamber and the rod-containing chamber.
The first cylinder 10 and the second cylinder 20 may be mounted on a fixed shaft of the wind power generation set, and locking pins mounted in the rod chambers B1 and B2 may be inserted into grooves or the like on a moving shaft of the wind power generation set. Alternatively, the cylinders of the first cylinder 10 and the second cylinder 20 may serve as locking pins that can be extended or retracted by the pressure difference between the rodless chamber and the rod-containing chamber. The piston rods with the rod cavities B1 and B2 can be fixed on the fixed shaft of the wind generating set, and the cylinder bodies of the first oil cylinder 10 and the second oil cylinder 20 can be inserted into grooves and the like on the moving shaft of the wind generating set. As described above, if the first cylinder 10 and the second cylinder 20 are simultaneously extended and/or simultaneously retracted, the locking pins in the first cylinder 10 and the second cylinder 20 may be locked or locked.
The oil pressure adjusting unit 30 of the present invention may be disposed on the oil supply path of the rodless chamber A1 of the first oil cylinder 10 to adjust the opening oil pressure of the oil supply path so as to delay the extension of the locking pin of the first oil cylinder 10, or the extension of the locking pin of the first oil cylinder 10 may be started after the locking pin of the second oil cylinder 20 has completed locking. The oil pressure adjusting unit 30 is unidirectionally conducted in the oil supply direction, whereby the first oil cylinder 10 and the second oil cylinder 20 can be sequentially locked, thereby preventing the locking pin of the first oil cylinder 10 and/or the second oil cylinder 20 from being stuck.
The oil passage connected to the inlet of the oil pressure adjusting unit 30 may be provided with a branch point C, and the branch point C may be connected to the oil supply path of the rodless chamber A2 of the second cylinder 20.
In addition, the impeller locking hydraulic system may further include a direction valve unit 40, and the direction valve unit 40 may be connected between the hydraulic pressure source 1 and the inlet of the oil pressure adjusting unit 30, and the rod chamber B1 of the first cylinder 10 and the rod chamber B2 of the second cylinder 20 may be connected with the direction valve unit 40 to form an oil return path from the rod chamber B1 of the first cylinder 10 to the oil collecting unit 2 and from the rod chamber B2 of the second cylinder 20 to the oil collecting unit 2. Specifically, the input end of the reversing valve unit 40 may be in communication with the hydraulic pressure source 1, the output end of the reversing valve unit 40 may be in communication with the input end of the oil pressure adjusting unit 30 and the rodless chamber A2 of the second cylinder 20, respectively, the reversing valve unit 40 may be implemented by a plurality of solenoid valves, and the type of the reversing valve unit 40 is not particularly limited as long as the flow direction of the hydraulic oil in the oil supply and return path can be changed.
Although the oil supply and return paths are shown as sharing the reversing valve unit 40 in the drawings, embodiments of the present invention are not limited thereto, and for example, oil supply holes and oil outlet holes may be additionally opened in the chambers of the first and second cylinders 10 and 20, and an oil return path separate from the oil supply path may be additionally provided.
Preferably, the reversing valve unit 40 may be implemented by a plurality of two-position two-way solenoid valves connected in parallel, and the rod chamber B1 of the first cylinder 10 and the rod chamber B2 of the second cylinder 20 may be in communication with the oil collecting unit 2 or the hydraulic pressure source 1 via the reversing valve unit 40, for example, two-position two-way solenoid valves (for example, 4 two-position two-way solenoid valves) are respectively provided on the non-rod chambers and the oil supply return paths of the rod chambers of the first cylinder 10 and the second cylinder 20 to implement communication with the oil collecting unit 2 or the hydraulic pressure source 1.
For example, when oil is supplied to the rod chamber B1 of the first cylinder 10, the rod chamber B1 of the first cylinder 10 communicates with the hydraulic pressure source 1, and when oil of the rod chamber B1 of the first cylinder 10 is released, the rod chamber B1 of the first cylinder 10 communicates with the oil collecting unit 2.
The hydraulic pressure source 1 may be a hydraulic pressure source external to the impeller locking hydraulic system, in other words, the hydraulic pressure source 1 may be other hydraulic pressure systems of the wind generating set, or may be a hydraulic pressure source of the impeller locking hydraulic system, for example, a hydraulic tank. The oil collection unit 2 may be a component of the impeller locking hydraulic system itself, for example, a hydraulic oil tank. In addition, the hydraulic pressure source 1 and the oil collecting unit 2 may be integrated into a single component.
Although not shown, the impeller lock hydraulic system of the present invention may also include components to drive pumps, accumulators, pressure relief valves, various sensors, and the like.
As shown in fig. 1, the oil pressure regulating unit 30 may include a first sequence valve 31, and the first sequence valve 31 may be installed between the rodless chamber A1 of the first cylinder 10 and the output end of the reversing valve unit 40. Here, the first sequence valve 31 may also be implemented by a check valve having a large opening pressure, and the first sequence valve 31 and the check valve may be regarded as oil pressure regulating valves.
The opening pressure of the first sequence valve 31 may be higher than the oil pressure output from the output end of the reversing valve unit 40, and thus, the activation time of the oil supply path of the rodless chamber A1 of the first cylinder 10 may be delayed.
The oil pressure regulating unit 30 may further include a pressure reducing valve 32, an inlet of the first sequence valve 31 may communicate with an output end of the reversing valve unit 40, an outlet of the first sequence valve 31 may communicate with an inlet of the pressure reducing valve 32, and an outlet of the pressure reducing valve 32 may communicate with the rodless chamber A1 of the first cylinder 10.
The relief valve 32 may reduce the oil pressure raised by the first sequence valve 31 to be equal to or lower than the oil pressure of the hydraulic oil on the oil supply path of the rodless chamber of the second cylinder 20.
In addition, the first output port of the output end of the reversing valve unit 40 may be directly communicated with the rodless chamber A2 of the second cylinder 20, the second output port of the output end of the reversing valve unit 40 may be directly communicated with the rod-shaped chamber B1 of the first cylinder 10, and the second output port may be directly communicated with the rod-shaped chamber B2 of the second cylinder 20. Thereby, the complexity of the hydraulic system may be reduced.
Here, the input, output, input, and output of the reversing valve unit 40 are based on whether they are in communication with the hydraulic source 1 side or in communication with the cylinder side, and can be adaptively converted into the output, input, output, and input, respectively, when the oil inlet and outlet of a specific port are involved.
As shown in fig. 1, a first pressure relay 61 may be installed on the oil supply and return path of the rodless chamber A1 of the first cylinder 10, and a second pressure relay 62 may be installed on the oil supply and return path of the rod chamber B2 of the second cylinder 20.
When the lock pin of the first cylinder 10 is locked, the oil pressure of the rodless chamber A1 of the first cylinder 10 increases and exceeds a predetermined value, and at this time, the first pressure relay 61 may issue a command or instruction to control the reversing valve unit 40 based on the command or instruction. For example, when the lock pin of the first cylinder 10 is locked, the power supply to the reversing valve unit 40 may be stopped based on an instruction issued by the first pressure relay 61 (for example, an instruction issued by an indicator), and the neutral position "O" function may enable the state maintenance, so that the service life of the reversing valve unit 40 (for example, a three-position four-way reversing valve) may be improved.
Similarly, when the release of the locking pin of the second cylinder 20 is completed, the oil pressure of the rod chamber B2 of the second cylinder 20 increases and exceeds a predetermined value, and at this time, the second pressure relay 62 may issue a command or instruction to control the reversing valve unit 40 based on the command or instruction to stop the oil supply to the rod chamber B2 of the second cylinder 20.
In addition, a pressure relay may be provided on the oil supply and return path of the rod chamber B1 of the first cylinder 10 or the oil supply and return path of the rod-less chamber A2 of the second cylinder 20. These pressure relays may be omitted from the standpoint of reducing circuit complexity.
In the present invention, the oil supply/return path refers to a path shared by oil supply and return. For example, the oil supply and return path of the rodless chamber A1 of the first cylinder 10 may refer to a path between the rodless chamber A1 and the mounting point of the first pressure relay 61.
As shown in fig. 1, a first check valve 50 is installed between the oil supply and return path of the rodless chamber A1 of the first cylinder 10 and the oil supply and return path of the rodless chamber A2 of the second cylinder 20. The first check valve 50 may allow the path between the rodless chamber A1 and the mounting point of the first pressure relay 61 to serve as an oil return path, for example, in the case where the hydraulic oil in the rodless chamber A1 reaches the opening pressure of the first check valve 50, the oil supply and return path of the rodless chamber A1 of the first cylinder 10 may be communicated with the oil supply and return path of the second cylinder 20 so as to flow back to the oil collection unit 2 with the hydraulic oil on the oil supply and return path of the second cylinder 20.
As described above, the reversing valve unit 40 is preferably a three-position four-way reversing valve, whereby the operation flow can be reduced, and the complexity of the system can be reduced. The P and T ports of the three-position four-way reversing valve may be located at the input end of the reversing valve unit mentioned above, and the a and B ports of the three-position four-way reversing valve may be located at the output end of the reversing valve unit mentioned above.
The control of the reversing valve unit and the locking of the impeller can be realized by manual operation. In addition, the impeller lock hydraulic system of the embodiment of the present invention may further include a control unit (not shown) that controls the power supply of the three-position four-way reversing valve. The control unit may be implemented by an integrated circuit, may be integrated with a power module of the reversing valve unit, and may be implemented by an integrated circuit.
For example, the control unit may control power supply to the three-position four-way switching valve when the impeller locking hydraulic system locks the impeller, so that the P port and the a port of the three-position four-way switching valve communicate (the spool a is biased), and the T port communicates (the spool a is biased) with the B port, thereby forming a first oil supply path for supplying oil to the rodless chamber A1 of the first cylinder 10 and a second oil supply path for supplying oil to the rodless chamber A2 of the second cylinder 20, and a first oil return path for releasing oil in the rod chamber B1 of the first cylinder 10 and a second oil return path for releasing oil in the rod chamber B2 of the second cylinder 20.
Furthermore, when the impeller locking hydraulic system unlocks the impeller, the control unit may control power supply to the three-position four-way reversing valve, so that the port P and the port B of the three-position four-way reversing valve are communicated, and the port T and the port a are communicated (the valve core B is biased), thereby forming a third oil supply path for supplying oil to the rod cavity B1 of the first oil cylinder 10 and a fourth oil supply path for supplying oil to the rod cavity B2 of the second oil cylinder 20, and a third oil return path for releasing oil in the rod-free cavity A1 of the first oil cylinder 10 and a fourth oil return path for releasing oil in the rod-free cavity A2 of the second oil cylinder 20.
Here, the first oil supply path sequentially passes through the three-position four-way switching valve, the first sequence valve 31, the pressure reducing valve 32, and the rodless chamber A1 (40→31→32→a1) of the first cylinder 10, the second oil supply path sequentially passes through the three-position four-way switching valve and the rodless chamber A2 (40→a2) of the second cylinder 20, the third oil supply path sequentially passes through the three-position four-way switching valve and the rod-containing chamber B1 (40→b1) of the first cylinder 10, and the fourth oil supply path sequentially passes through the three-position four-way switching valve and the rod-containing chamber B2 (40→b2) of the second cylinder 20.
In addition, the first oil return path sequentially passes through the rod cavity B1 and the three-position four-way reversing valve (b1→40) of the first oil cylinder 10, the second oil return path sequentially passes through the rod cavity B2 and the three-position four-way reversing valve (b2→40) of the second oil cylinder 20, the third oil return path sequentially passes through the rodless cavity A1, the first check valve 50 and the three-position four-way reversing valve (a1→50→40) of the first oil cylinder 10, and the fourth oil return path sequentially passes through the rodless cavity A2 and the three-position four-way reversing valve (a2→40) of the second oil cylinder 20.
Fig. 2 is a schematic diagram of an impeller lock hydraulic system according to a second embodiment of the invention.
For convenience of description, description of the same components as those of fig. 1 in fig. 2 will be omitted.
As shown in fig. 2, a second sequence valve 80 may be installed on the oil supply path of the rod chamber B2 of the second cylinder 20, and a second check valve 70 may be installed on the oil supply and return path of the rod chamber B2 of the second cylinder 20 and the oil supply and return path of the rod chamber B1 of the first cylinder 10.
Specifically, when the impeller locking hydraulic system locks the impeller, the control unit may control power supply to the three-position four-way reversing valve so that the port P of the three-position four-way reversing valve communicates with the port a and the port T communicates with the port B, thereby forming a first oil supply path for supplying oil to the rodless chamber A1 of the first oil cylinder 10 and a second oil supply path for supplying oil to the rodless chamber A2 of the second oil cylinder 20, and a first oil return path for releasing oil in the rod-containing chamber B1 of the first oil cylinder 10 and a fifth oil return path for releasing oil in the rod-containing chamber B2 of the second oil cylinder 20.
In addition, the control unit may control power supply to the three-position four-way directional valve when the impeller locking hydraulic system unlocks the impeller, so that the port P and the port B of the three-position four-way directional valve communicate, and the port T communicates with the port a, thereby forming a third oil supply path for supplying oil to the rod chamber B1 of the first oil cylinder 10 and a fifth oil supply path for supplying oil to the rod chamber B2 of the second oil cylinder 20, and a third oil return path for releasing oil in the rod-less chamber A1 of the first oil cylinder 10 and a fourth oil return path for releasing oil in the rod-less chamber A2 of the second oil cylinder 20.
Here, the first oil supply path sequentially passes through the three-position four-way switching valve, the first sequence valve 31, the pressure reducing valve 32, and the rodless chamber A1 (40→31→32→a1) of the first cylinder 10, the second oil supply path sequentially passes through the three-position four-way switching valve and the rodless chamber A2 (40→a2) of the second cylinder 20, the third oil supply path sequentially passes through the three-position four-way switching valve and the rod-containing chamber B1 (40→b1) of the first cylinder 10, and the fifth oil supply path sequentially passes through the three-position four-way switching valve, the second sequence valve 80, and the rod-containing chamber B2 (40→80→b2) of the second cylinder 20.
In addition, the first oil return path sequentially passes through the rod cavity B1 of the first oil cylinder 10 and the three-position four-way reversing valve (b1→40), the fifth oil return path sequentially passes through the rod cavity B2 of the second oil cylinder 20, the second check valve 70 and the three-position four-way reversing valve (b2→70→40), the third oil return path sequentially passes through the rod-free cavity A1 of the first oil cylinder 10, the first check valve 50 and the three-position four-way reversing valve (a1→50→40), and the fourth oil return path sequentially passes through the rod-free cavity A2 of the second oil cylinder 20 and the three-position four-way reversing valve (a2→40).
Fig. 3 is a schematic diagram of an impeller lock hydraulic system according to a third embodiment of the invention.
For convenience of description, the same components as those of fig. 1 and the same components as those of fig. 2 in fig. 3 will be omitted.
In the third embodiment of the present invention, the hydraulic oil output from the hydraulic pressure source 1 may be further communicated with the input end of the reversing valve unit 40 through the first solenoid valve 3, and the output end of the oil pressure adjusting unit 30 may be communicated with another three-position four-way reversing valve 41. The P port of the three-position four-way electromagnetic valve 41 may be communicated with the output end of the oil pressure adjusting unit 30, the T port of the three-position four-way electromagnetic valve 41 may be communicated with the oil collecting unit 2, the a port of the three-position four-way electromagnetic valve 41 may be communicated with the rodless cavity A1 of the first oil cylinder 10, and the B port of the three-position four-way electromagnetic valve 41 may be communicated with the rod-containing cavity B1 of the first oil cylinder 10.
Furthermore, the hydraulic pressure source 1 and the output end of the reversing valve unit 40 may also be connected by a second solenoid valve 4.
In the locking and unlocking process of the impeller locking hydraulic system according to the third embodiment of the present invention, the oil supply and return manner of the second cylinder is similar to that of the first and second embodiments, and will not be described herein again, the oil supply manner of the first cylinder needs to additionally pass through the three-position four-way solenoid valve 41, and in the oil return process, hydraulic oil can be directly communicated with the oil collecting unit 2 from the rodless cavity A1 or the rod-containing cavity B1 through the T port of the three-position four-way solenoid valve 41 without passing through the reversing valve unit 40.
Those skilled in the art will appreciate that the components of any of the embodiments of the present invention may be used in other embodiments as long as the proper operation of the hydraulic system is ensured. In addition, the impeller locking hydraulic system according to the embodiment of the invention may be applied to a case where impeller locking is achieved using three or more cylinders.
The impeller locking hydraulic system according to the embodiment of the invention can retract the locking pin with small resistance, so that the resistance of the locking pin which is not retracted is reduced, thereby facilitating the retraction of the locking pin which is retracted later, and preventing the locking pin from being blocked.
The impeller locking hydraulic system according to the embodiment of the invention can reduce the operation flow, reduce the complexity of the system, improve the reliability of the system and the like.
The impeller locking hydraulic system provided by the embodiment of the invention is simple in structure and low in cost, and brings great convenience to maintenance of the wind generating set.
The impeller locking hydraulic system provided by the embodiment of the invention brings great convenience for maintenance of the wind generating set.
The above description is merely a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modification or substitution easily recognized by those skilled in the art within the technical scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (11)
1. An impeller locking hydraulic system of a wind generating set, comprising:
The first oil cylinder (10), the first oil cylinder (10) includes a rod cavity (B1) and a rodless cavity (A1);
The second oil cylinder (20), the said second oil cylinder (20) includes the rod cavity (B2) and rodless cavity (A2);
An oil pressure adjusting unit (30), the oil pressure adjusting unit (30) being arranged on an oil supply path of a rodless chamber (A1) of the first oil cylinder (10), the oil pressure adjusting unit (30) being one-way conductive in an oil supply direction and adjusting an opening oil pressure of the oil supply path to sequentially lock the first oil cylinder (10) and the second oil cylinder (20), thereby preventing locking pins of the first oil cylinder (10) and/or the second oil cylinder (20) from being stuck;
wherein a branch point is arranged on an oil path connected with the inlet of the oil pressure regulating unit (30), the branch point is connected with an oil supply path of the rodless cavity (A2) of the second oil cylinder (20),
Wherein the impeller locking hydraulic system is configured to retract the locking pin of the first and second cylinders, which is subjected to less resistance, first so as to avoid the locking pin of the first and/or second cylinders (10, 20) from seizing.
2. The impeller locking hydraulic system of a wind power generator set according to claim 1, further comprising a reversing valve unit (40), said reversing valve unit (40) being connected between a hydraulic source (1) and said inlet of said oil pressure regulating unit (30), wherein a rod cavity (B1) of said first cylinder (10) and a rod cavity (B2) of said second cylinder (20) are connected with said reversing valve unit (40) to form an oil return path from the rod cavity (B1) of the first cylinder (10) to the oil collecting unit (2) and from the rod cavity (B2) of the second cylinder (20) to said oil collecting unit (2).
3. The impeller lock hydraulic system of a wind turbine according to claim 2, characterized in that the oil pressure regulating unit (30) comprises a first sequence valve (31) and a pressure reducing valve (32), the inlet of the first sequence valve (31) is in communication with the output of a reversing valve unit (40), the outlet of the first sequence valve (31) is in communication with the inlet of the pressure reducing valve (32), and the outlet of the pressure reducing valve (32) is in communication with the rodless cavity (A1) of the first cylinder (10).
4. A wind turbine generator system impeller lock hydraulic system according to claim 3, characterised in that the first output port of the output port is in direct communication with the rodless cavity (A2) of the second cylinder (20), the second output port of the output port is in direct communication with the rod cavity (B1) of the first cylinder (10), and the second output port is in direct communication with the rod cavity (B2) of the second cylinder (20).
5. The impeller locking hydraulic system of a wind turbine generator system according to claim 3, wherein the reversing valve unit (40) is a three-position four-way reversing valve, wherein the P-port and the T-port of the three-position four-way reversing valve are located at the input end, and wherein the a-port and the B-port of the three-position four-way reversing valve are located at the output end.
6. The impeller lock hydraulic system of a wind turbine according to claim 5, characterized in that a first pressure relay (61) is mounted on the oil supply return path of the rodless chamber (A1) of the first cylinder (10) and a second pressure relay (62) is mounted on the oil supply return path of the rod chamber (B2) of the second cylinder (20).
7. The impeller lock hydraulic system of a wind turbine according to claim 6, characterized in that a first non return valve (50) is installed between the oil supply and return path of the rodless chamber (A1) of the first cylinder (10) and the oil supply and return path of the rodless chamber (A2) of the second cylinder (20).
8. The impeller locking hydraulic system of a wind turbine according to claim 7, characterized in that a second sequence valve (80) is installed on the oil supply path of the rod cavity (B2) of the second oil cylinder (20), and a second one-way valve (70) is installed on the oil supply and return path of the rod cavity (B2) of the second oil cylinder (20) and the oil supply and return path of the rod cavity (B1) of the first oil cylinder (10).
9. The impeller lock hydraulic system of a wind turbine of claim 7, further comprising a control unit that controls the power supply of the three-position four-way reversing valve, the control unit configured to:
When the impeller locking hydraulic system locks the impeller, controlling to supply power to the three-position four-way reversing valve, enabling a port P of the three-position four-way reversing valve to be communicated with a port A, and enabling a port T to be communicated with a port B, so that a first oil supply path for supplying oil to a rodless cavity (A1) of a first oil cylinder (10) and a second oil supply path for supplying oil to a rodless cavity (A2) of a second oil cylinder (20) are formed, and a first oil return path for releasing oil in a rod cavity (B1) of the first oil cylinder (10) and a second oil return path for releasing oil in a rod cavity (B2) of the second oil cylinder (20) are formed;
When the impeller locking hydraulic system unlocks the impeller, controlling to supply power to the three-position four-way reversing valve, enabling a port P of the three-position four-way reversing valve to be communicated with a port B, and enabling a port T to be communicated with a port A, so that a third oil supply path for supplying oil to a rod cavity (B1) of a first oil cylinder (10) and a fourth oil supply path for supplying oil to a rod cavity (B2) of a second oil cylinder (20) are formed, and a third oil return path for releasing oil in a rodless cavity (A1) of the first oil cylinder (10) and a fourth oil return path for releasing oil in a rodless cavity (A2) of the second oil cylinder (20) are formed;
Wherein the first oil supply path sequentially passes through the three-position four-way reversing valve, the first sequence valve (31), the pressure reducing valve (32) and the rodless cavity (A1) of the first oil cylinder (10), the second oil supply path sequentially passes through the three-position four-way reversing valve and the rodless cavity (A2) of the second oil cylinder (20), the third oil supply path sequentially passes through the three-position four-way reversing valve and the rod cavity (B1) of the first oil cylinder (10), the fourth oil supply path sequentially passes through the three-position four-way reversing valve and the rod cavity (B2) of the second oil cylinder (20),
The first oil return path sequentially passes through a rod cavity (B1) of the first oil cylinder (10) and the three-position four-way reversing valve, the second oil return path sequentially passes through a rod cavity (B2) of the second oil cylinder (20) and the three-position four-way reversing valve, the third oil return path sequentially passes through a rodless cavity (A1) of the first oil cylinder (10), the first one-way valve (50) and the three-position four-way reversing valve, and the fourth oil return path sequentially passes through a rodless cavity (A2) of the second oil cylinder (20) and the three-position four-way reversing valve.
10. The impeller lock hydraulic system of a wind turbine of claim 8, further comprising a control unit that controls the power supply of the three-position four-way reversing valve, the control unit configured to:
When the impeller locking hydraulic system locks the impeller, controlling to supply power to the three-position four-way reversing valve, enabling a port P of the three-position four-way reversing valve to be communicated with a port A, and enabling a port T to be communicated with a port B, so that a first oil supply path for supplying oil to a rodless cavity (A1) of a first oil cylinder (10) and a second oil supply path for supplying oil to a rodless cavity (A2) of a second oil cylinder (20) are formed, and a first oil return path for releasing oil in a rod cavity (B1) of the first oil cylinder (10) and a fifth oil return path for releasing oil in a rod cavity (B2) of the second oil cylinder (20) are formed;
When the impeller locking hydraulic system unlocks the impeller, controlling to supply power to the three-position four-way reversing valve, enabling a port P of the three-position four-way reversing valve to be communicated with a port B, and enabling a port T to be communicated with a port A, so that a third oil supply path for supplying oil to a rod cavity (B1) of a first oil cylinder (10) and a fifth oil supply path for supplying oil to a rod cavity (B2) of a second oil cylinder (20) are formed, and a third oil return path for releasing oil in a rodless cavity (A1) of the first oil cylinder (10) and a fourth oil return path for releasing oil in a rodless cavity (A2) of the second oil cylinder (20) are formed;
Wherein the first oil supply path sequentially passes through the three-position four-way reversing valve, the first sequence valve (31), the pressure reducing valve (32) and the rodless cavity (A1) of the first oil cylinder (10), the second oil supply path sequentially passes through the three-position four-way reversing valve and the rodless cavity (A2) of the second oil cylinder, the third oil supply path sequentially passes through the three-position four-way reversing valve and the rod cavity (B1) of the first oil cylinder (10), the fifth oil supply path sequentially passes through the three-position four-way reversing valve, the second sequence valve (80) and the rod cavity (B2) of the second oil cylinder (20),
The first oil return path sequentially passes through a rod cavity (B1) of the first oil cylinder (10) and the three-position four-way reversing valve, the fifth oil return path sequentially passes through a rod cavity (B2) of the second oil cylinder (20), the second one-way valve (70) and the three-position four-way reversing valve, the third oil return path sequentially passes through a rodless cavity (A1) of the first oil cylinder (10), the first one-way valve (50) and the three-position four-way reversing valve, and the fourth oil return path sequentially passes through a rodless cavity (A2) of the second oil cylinder (20) and the three-position four-way reversing valve.
11. A wind power generator set comprising an impeller locking hydraulic system according to any one of claims 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811522590.9A CN109595129B (en) | 2018-12-13 | Impeller locking hydraulic system and wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811522590.9A CN109595129B (en) | 2018-12-13 | Impeller locking hydraulic system and wind generating set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109595129A CN109595129A (en) | 2019-04-09 |
| CN109595129B true CN109595129B (en) | 2024-07-05 |
Family
ID=
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102146893A (en) * | 2011-02-23 | 2011-08-10 | 北车风电有限公司 | Method for locking spindle lock of wind power generator set |
| CN202343616U (en) * | 2011-12-14 | 2012-07-25 | 中联重科股份有限公司 | Moulding equipment for tube end of hard tube and hydraulic control system thereof |
| CN105781889A (en) * | 2016-03-09 | 2016-07-20 | 太原重工股份有限公司 | Wind power unit and wind wheel locking device thereof |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102146893A (en) * | 2011-02-23 | 2011-08-10 | 北车风电有限公司 | Method for locking spindle lock of wind power generator set |
| CN202343616U (en) * | 2011-12-14 | 2012-07-25 | 中联重科股份有限公司 | Moulding equipment for tube end of hard tube and hydraulic control system thereof |
| CN105781889A (en) * | 2016-03-09 | 2016-07-20 | 太原重工股份有限公司 | Wind power unit and wind wheel locking device thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2816237B1 (en) | Electro hydrostatic actuator | |
| US10480346B2 (en) | Hydraulic control device for an emergency stop valve of a steam turbine and steam turbine arrangement | |
| CN111692141B (en) | Hydraulic system for controlling oil cylinder | |
| US10808734B2 (en) | Apparatus for controlling a hydraulic machine | |
| CN111810477B (en) | Hydraulic system for bolt lifting device | |
| CN103967857A (en) | Control system of hydraulic quick change device and engineering machine | |
| US9689500B2 (en) | Pressure limited flow spool | |
| WO2021049093A1 (en) | Hydraulic circuit of electro-hydraulic actuator system for steam turbine, and steam turbine system including same | |
| CN109595129B (en) | Impeller locking hydraulic system and wind generating set | |
| US10962032B2 (en) | Apparatus for controlling a hydraulic machine | |
| CN111395906A (en) | Hydraulic control mechanism for airplane cabin door | |
| CN111288029B (en) | Brake hydraulic control system | |
| CN112010162B (en) | Blade hoisting tool and hydraulic system thereof | |
| CN109236554A (en) | Guide vane closes system and its control method when pump-storage generator failure | |
| CN114135528A (en) | Composite multi-way valve and energy-saving composite action control tower crane jacking hydraulic system | |
| CN115978034A (en) | Hydraulic locking system and hydraulic equipment | |
| CN214616871U (en) | Braking system for wind generating set | |
| CN109441914B (en) | Gate hydraulic double-redundancy control device and method | |
| CN111720376A (en) | Flow dividing valve, hydraulic system thereof and engineering machinery | |
| CN202545391U (en) | Integrated multiplex reversing valve | |
| CN108071619B (en) | Variable-pitch hydraulic system and wind generating set | |
| CN215908158U (en) | Hydraulic locking system and hydraulic equipment | |
| CN113915058A (en) | Braking system for wind generating set | |
| CN111795016B (en) | Hydraulic system for controlling oil cylinder | |
| CN113586532B (en) | Construction machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |