Wind turbine yaw driving device

Abstract

The utility model discloses a wind turbine yaw driving device, cladding central ring disk, support arm, hydraulic pump and hydraulic motor, the periphery of central ring disk is integrally molded with a plurality of evenly distributed support arm, the outer end of each support arm is provided with an outer mounting hole, the hydraulic motor is fixedly installed in the outer mounting hole, the hydraulic pump is connected with the hydraulic motor, and the hydraulic pump is connected with the hydraulic motor. The output end of the hydraulic motor is fixedly provided with a driving gear, the middle of the central ring disc is provided with an inner mounting hole, the inner mounting hole is internally and fixedly provided with a hydraulic pump, the upper surface of the central ring disc is fixedly provided with a backflow pressure overflow valve, and the lower surface of the central ring disc is fixedly provided with an oil tank; the hydraulic motor is synchronously driven to work through the hydraulic pump, then synchronous driving force is generated, the debugging process of the whole device is greatly shortened, meanwhile, inertial impact generated in the stopping process can be effectively absorbed through hydraulic driving, overload pressure is relieved through the arranged backflow pressure overflow valve, and the safety of the device is improved. And the working stability of the device is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power equipment, in particular to a yaw drive device for a wind generator. Background Art

[0002] The wind turbine is the main working structure of the wind turbine. According to its own control structure, the blade surface installed outside is always perpendicular to the wind direction, so as to ensure the optimal utilization of wind force and avoid uneven force on the blades caused by wind deviation, which may cause damage to the blades. Therefore, a driving device is needed to adjust the direction of the wind turbine. The existing driving device is generally driven by a single large torque motor, which is composed of a combined driving structure through several independent devices to ensure driving efficiency. However, the independent driving device has different overall synchronization when working, which makes the debugging and installation process more complicated. At the same time, it is necessary to add a synchronous control device to ensure the synchronization of starting and stopping, which greatly increases the installation workload.

[0003] Therefore, it is necessary to design a wind turbine yaw drive device with strong practicality. Utility Model Content

[0004] The utility model aims to provide a wind turbine yaw drive device to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a wind turbine yaw drive device, a central ring disk, a support arm, a hydraulic pump and a hydraulic motor, the outer circumference of the central ring disk is integrally formed with a plurality of evenly distributed support arms, each of the support arms has an outer mounting hole at the beginning of the outer end, a hydraulic motor is fixedly mounted in the outer mounting hole, a driving gear is fixedly mounted on the output end of the hydraulic motor, an inner mounting hole is opened in the middle of the central ring disk, a hydraulic pump is fixedly mounted in the inner mounting hole, a reflux pressure relief valve is fixedly mounted on the upper surface of the central ring disk, an oil tank is fixedly mounted on the lower surface of the central ring disk, one port of the hydraulic pump is connected to one port of the oil tank through a third oil pipe, two ports of the hydraulic pump are connected to one port of the hydraulic motor through a first oil pipe, one port of the reflux pressure relief valve is connected to two ports of the hydraulic motor through a second oil pipe, two ports of the reflux pressure relief valve are connected to two ports of the oil tank through the inner connecting hole, and extend below the liquid level therein.

[0006] According to the above technical solution, the hydraulic motor has double-end output, and a driving gear is fixedly installed at each output end. The two ends of the hydraulic motor protrude equidistantly from the upper and lower surfaces of the support arm, and a gap is left between the driving gear and the two ends of the hydraulic motor.

[0007] According to the above technical solution, the number of the reflux pressure relief valves is the same as the number of the support arms, the hydraulic motor and the reflux pressure relief valve are installed one-to-one, the internal connecting holes opened in the central ring disk correspond one-to-one to the reflux pressure relief valves, and the reflux pressure relief valves are symmetrically distributed based on the center of the central ring disk axis.

[0008] According to the above technical solution, the reflux relief valve is enclosed in an outer shell, a piston is slidably installed in the outer shell, a servo motor is fixedly installed at the open end of the outer shell, an embedded block is fixedly installed at the output end of the servo motor, the embedded block is embedded in the rotating threaded shell, the rotating threaded shell is rotated and installed in the outer shell, and is located between the piston and the servo motor, one end of the screw shaft is threaded in the threaded mouth of the rotating threaded shell, the other end of the screw shaft is sealed and slidably installed with the piston, a spring is sleeved on the outer shell, the spring is located between the piston and the rotating threaded shell, a first liquid port is opened at the closed end of the outer shell, a second liquid port is opened on the cylindrical wall of the outer shell, and the second liquid port is closed when the piston is in the reset state.

[0009] According to the above technical solution, an internal pipe is buried in the internal connection hole, and the upper end of the internal pipe is connected to the second liquid port, and the lower end is located below the liquid level of the oil tank.

[0010] According to the above technical solution, the outer ring bottom of the oil tank is higher than the inner ring bottom of the oil tank, and the inner end of the third oil pipe is located in the oil tank and close to the inner ring bottom of the oil tank.

[0011] Compared with the prior art, the beneficial effects achieved by the utility model are as follows: the utility model uses a hydraulic pump to synchronously drive the hydraulic motor to work, thereby generating a synchronous driving force, thereby greatly shortening the debugging process of the entire device, and at the same time, the hydraulic drive can effectively absorb the inertial impact generated during the stopping process, and a reflux pressure relief valve is provided to relieve the overload pressure, thereby ensuring the stability of the device operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model from one viewing angle;

[0014] Figure 2 It is a schematic diagram of the main cross-sectional structure of the utility model;

[0015] Figure 3 This is a three-dimensional structural schematic diagram of the load-bearing installation structure of the utility model from one viewing angle;

[0016] Figure 4This is a three-dimensional structural schematic diagram of the driving structure of the utility model from one viewing angle;

[0017] Figure 5 It is a main sectional structural schematic diagram of the reflux pressure relief valve of the utility model.

[0018] In the figure: 1, central ring disk, 2, support arm, 3, hydraulic pump, 4, hydraulic motor, 5, driving gear, 6, reflux relief valve, 601, housing, 602, piston, 603, servo motor, 604, embedded block, 605, rotating thread shell, 606, screw shaft, 607, spring, 608, first liquid port, 609, second liquid port, 7, oil tank, 8, first oil pipe, 9, second oil pipe, 10, third oil pipe, 11, inner connecting hole, 12, inner mounting hole, 13, outer mounting hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-5 The utility model provides a technical solution: a wind turbine yaw drive device, a central ring disk 1, a support arm 2, a hydraulic pump 3 and a hydraulic motor 4, the outer circumference of the central ring disk 1 is integrally formed with a plurality of evenly distributed support arms 2, each of the support arms 2 has an outer mounting hole 13 at the beginning of the outer end, a hydraulic motor 4 is fixedly installed in the outer mounting hole 13, a driving gear 5 is fixedly installed at the output end of the hydraulic motor 4, an inner mounting hole 12 is opened in the middle of the central ring disk 1, a hydraulic pump is fixedly installed in the inner mounting hole 12 3, a reflux relief valve 6 is fixedly mounted on the upper surface of the central ring disk 1, an oil tank 7 is fixedly mounted on the lower surface of the central ring disk 1, one port of the hydraulic pump 3 is connected to one port of the oil tank 7 through a third oil pipe 10, two ports of the hydraulic pump 3 are connected to one port of the hydraulic motor 4 through a first oil pipe 8, one port of the reflux relief valve 6 is connected to two ports of the hydraulic motor 4 through a second oil pipe 9, two ports of the reflux relief valve 6 are connected to two ports of the oil tank 7 through an inner connecting hole 11, and extend below the liquid level therein.

[0021] The central ring disk 1 and the support arm 2 constitute the main load-bearing installation structure. The external installation hole 13 opened at the outer end of the support arm 2 provides an installation basis for the hydraulic motor 4, and the hydraulic pump 3 provides a fluid driving force for the hydraulic motor 4. The driving gear 5 outputs the power of the hydraulic motor 4, and then the wind turbine structure is driven to adjust the direction. The internal installation hole 12 provides an installation basis for the hydraulic pump 3, and the oil tank 7 provides a surplus support for the driving hydraulic oil, and the first oil pipe 8, the second oil pipe 9, the third oil pipe 10 and the internal connecting hole 11 constitute a circulating oil circuit connecting various components.

[0022] Specifically, the hydraulic motor 4 has double-end output, and a driving gear 5 is fixedly installed at each output end. The two ends of the hydraulic motor 4 protrude equidistantly from the upper surface and the lower surface of the support arm 2, and a gap is left between the driving gear 5 and the two ends of the hydraulic motor 4.

[0023] Through the double-end output of the hydraulic motor 4 and the installation of the driving gear 5, the driving force generated by the entire driving structure can act more evenly on the matching structure of the wind turbine set, and the setting of the margin and gap can better ensure that no friction is generated during the operation of the device.

[0024] Specifically, the number of the reflux pressure relief valves 6 is the same as the number of the support arms 2, the hydraulic motors 4 are installed one-to-one with the reflux pressure relief valves 6, the internal connecting holes 11 opened on the central ring disk 1 correspond one-to-one with the reflux pressure relief valves 6, and the reflux pressure relief valves 6 are symmetrically distributed based on the axis center of the central ring disk 1.

[0025] By matching the backflow relief valve 6 with the hydraulic motor 4, each hydraulic motor 4 can independently bear the excess hydraulic pressure generated when the wind turbine base is over-deflected, avoiding backflow caused by the overall bearing, overloading the pipeline and causing it to burst, and the independently arranged internal connecting hole 11 allows the circuit to form a branch back connection.

[0026] Specifically, the reflux relief valve 6 comprises a shell 601, a piston 602 is slidably installed in the shell 601, a servo motor 603 is fixedly installed at the open end of the shell 601, an embedded block 604 is fixedly installed at the output end of the servo motor 603, the embedded block 604 is embedded in a rotating threaded shell 605, the rotating threaded shell 605 is rotated and installed in the shell 601, and is located between the piston 602 and the servo motor 603, one end of a screw shaft 606 is threaded in the threaded mouth of the rotating threaded shell 605, the other end of the screw shaft 606 is sealed and slidably installed with the piston 602, a spring 607 is sheathed on the screw shaft 606, and the spring 607 is located between the piston 602 and the rotating threaded shell 605, a first liquid port 608 is provided at the closed end of the shell 601, a second liquid port 609 is provided on the cylindrical wall of the shell 601, and the second liquid port 609 is closed when the piston 602 is in the reset state.

[0027] The shell 601 is the external main structure of the reflux pressure relief valve 6. The piston 602 realizes different passage controls and diverts the overflow pressure through its own displacement. The servo motor 603 is driven by its own control, so that the embedded block 604 can drive the rotating threaded shell 605 to rotate. The rotating threaded shell 605 is threadedly matched with the screw shaft 606 to control the position of the piston 602. The spring 607 enables the piston 602 to slide back and forth relative to the screw shaft 606, thereby realizing the functions of overflow and pressure relief. The setting of the first liquid port 608 and the second liquid port 609 cooperates with the shell 601 to form an overall liquid flow closing control structure.

[0028] Specifically, an internal pipe is embedded in the internal connection hole 11 , and the upper end of the internal pipe is connected to the second liquid port 609 , and the lower end of the internal pipe is located below the liquid level of the oil tank 7 .

[0029] By setting an internal pipe and inserting the lower end below the liquid surface, the overall liquid flow can circulate in the forward direction or in the reverse direction.

[0030] Specifically, the outer ring bottom of the oil tank 7 is higher than the inner ring bottom of the oil tank 7 , and the inner end of the third oil pipe 10 is located in the oil tank 7 and close to the inner ring bottom of the oil tank 7 .

[0031] The oil in the oil tank 7 can be better concentrated by the height difference of the bottom of the oil tank 7 .

[0032] Working principle: When in use, the device is connected to the external electronic control system and effectively fixed on the preset structure, and the driving gear 5 is effectively engaged. The hydraulic pump 3 rotates forward or reversely under the control of the electronic control system, and then the liquid flow inside the device flows forward or reversely, so that the hydraulic motor 4 rotates forward or reversely. When the device stops driving, the wind turbine set produces over-position deflection due to inertia and wind direction, and the generated overflow pressure is buffered and absorbed by the reflux pressure relief valve 6.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A yaw drive device for a wind turbine, comprising a central ring disk (1) of a cladding, a support arm (2), a hydraulic pump (3) and a hydraulic motor (4), characterized in that: The outer circumference of the central ring disk (1) is integrally formed with a plurality of evenly distributed support arms (2), each support arm (2) having an outer mounting hole (13) at its outer end, a hydraulic motor (4) being fixedly mounted in the outer mounting hole (13), a driving gear (5) being fixedly mounted at the output end of the hydraulic motor (4), an inner mounting hole (12) being opened in the middle of the central ring disk (1), a hydraulic pump (3) being fixedly mounted in the inner mounting hole (12), and a return pressure relief valve (6) being fixedly mounted on the upper surface of the central ring disk (1) An oil tank (7) is fixedly mounted on the lower surface of the central ring disk (1); one port of the hydraulic pump (3) is connected to one port of the oil tank (7) via a third oil pipe (10); two ports of the hydraulic pump (3) are connected to one port of the hydraulic motor (4) via a first oil pipe (8); one port of the return pressure relief valve (6) is connected to two ports of the hydraulic motor (4) via a second oil pipe (9); two ports of the return pressure relief valve (6) are connected to two ports of the oil tank (7) via an internal connecting hole (11) and extend below the liquid level therein.

2. A wind turbine yaw drive device according to claim 1, characterized in that: The hydraulic motor (4) has double-end output, and each output end is fixedly mounted with a driving gear (5). The two ends of the hydraulic motor (4) protrude equidistantly from the upper surface and the lower surface of the support arm (2), and a gap is left between the driving gear (5) and the two ends of the hydraulic motor (4).

3. A wind turbine yaw drive device according to claim 1, characterized in that: The number of the return pressure relief valves (6) is the same as the number of the support arms (2); the hydraulic motors (4) and the return pressure relief valves (6) are installed in a one-to-one matching manner; the inner connecting holes (11) provided on the central ring disk (1) correspond to the return pressure relief valves (6) in a one-to-one manner; and the return pressure relief valves (6) are symmetrically distributed based on the axis center of the central ring disk (1).

4. A wind turbine yaw drive device according to claim 3, characterized in that: The return pressure relief valve (6) is enclosed by a housing (601), a piston (602) is slidably mounted in the housing (601), a servo motor (603) is fixedly mounted at the open end of the housing (601), an embedded block (604) is fixedly mounted at the output end of the servo motor (603), the embedded block (604) is embedded in a rotating thread housing (605), the rotating thread housing (605) is rotated and mounted in the housing (601), and is located between the piston (602) and the servo motor (603), the rotating thread housing ( One end of a screw shaft (606) is screwed into a threaded opening of a housing (605), and the other end of the screw shaft (606) is sealingly and slidably mounted on a piston (602). A spring (607) is sheathed on the screw shaft (606), and the spring (607) is located between the piston (602) and the rotating threaded housing (605). A first liquid port (608) is provided at a closed end of the housing (601), and a second liquid port (609) is provided on a cylindrical wall of the housing (601). The second liquid port (609) is closed when the piston (602) is in a reset state.

5. The wind turbine yaw drive device according to claim 1, characterized in that: An internal pipe is buried in the internal connection hole (11), and the upper end of the internal pipe is connected to the second liquid port (609), and the lower end is located below the liquid level of the oil tank (7).

6. A wind turbine yaw drive device according to claim 1, characterized in that: The outer ring bottom of the oil tank (7) is higher than the inner ring bottom of the oil tank (7), and the inner end of the third oil pipe (10) is located inside the oil tank (7) and close to the inner ring bottom of the oil tank (7).

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