Encoder mounting structure and wind generating set

Abstract

The utility model provides an encoder mounting structure and a wind generating set. And the encoder mounting structure is used for connecting the rotary encoder and the variable-pitch motor. The encoder mounting structure comprises an outer fixing sleeve and an inner fixing sleeve, the outer fixing sleeve is sleeved on the periphery of the inner fixing sleeve, and the inner fixing sleeve is sleeved on the periphery of the rotating shaft. A counter bore is formed in a rotating shaft of the rotary encoder in the axial direction, a rotating shaft of the variable-pitch motor is embedded in the counter bore, and the rotating shaft is fixedly connected with the counter bore. The variable pitch motor is provided with a brake, two ends of the outer fixing sleeve are respectively connected to the brake and the rotary encoder, a brake end face of the brake is provided with a positioning groove, one end, facing the brake end face, of the outer fixing sleeve is provided with a positioning bulge, and the positioning bulge is clamped in the positioning groove. According to the encoder mounting structure, the rotary encoder is connected with the variable pitch motor, and the joint of the main shaft and the rotary shaft has high connection stability in the axial direction and the radial direction of the main shaft.

Description

Technical Field

[0001] The present application relates to wind power generation technology, and in particular to an encoder installation structure and a wind power generator set. Background Art

[0002] As an important part of modern renewable energy, the stable operation of wind turbines is of great significance for the continuous supply of electric energy. In the operation of wind turbines, rotary encoders and pitch motors are key components, which are connected by bearings to achieve precise control and adjustment during the power conversion process.

[0003] However, during the operation of wind turbines, due to the influence of the wind environment, such as sudden changes in wind speed and wind direction, the wind turbines will inevitably produce shaking and vibrations, which have a great impact on the various components of the wind turbines, especially the connecting components. For the bearings between the rotary encoder and the pitch motor, long-term shaking and vibration will cause the bearings to wear more severely and may even become stuck. This not only affects the normal operation of the wind turbine, but may also cause more serious equipment failures and increase the cost of maintenance and replacement of parts.

[0004] Therefore, the existing technology has the problem of instability of the rotary encoder and the pitch motor in the wind turbine generator set. Utility Model Content

[0005] The present application provides an encoder installation structure and a wind turbine generator set, which are used to solve the problem of instability of the rotary encoder in the prior art.

[0006] On the one hand, the present application provides an encoder installation structure, comprising:

[0007] A rotary encoder, wherein a first rotating shaft is provided inside the rotary encoder, and an opening is provided on the first rotating shaft along the axial direction;

[0008] The motor is provided with a second rotating shaft, the second rotating shaft passes through the brake and is fixedly connected to the first rotating shaft through an opening;

[0009] The fixing sleeve is sleeved with the second rotating shaft, and the fixing sleeve is slidably connected to the second rotating shaft, one end of the fixing sleeve is connected to the rotary encoder, and the other end of the fixing sleeve is fixedly connected to the brake. In some embodiments, a limiting protrusion is provided at one end of the inner fixing sleeve close to the rotary encoder, and a limiting groove is provided at one end of the outer fixing sleeve close to the rotary encoder, and the limiting protrusion is clamped in the limiting groove.

[0010] In some embodiments, the first rotating shaft includes a first step shaft portion and a second step shaft portion connected to each other, the first step shaft portion is connected to the rotary encoder, the second step shaft portion is sleeved on the second rotating shaft through an opening, and the fixed sleeve is sleeved on the second step shaft portion, wherein the shaft diameter of the first step shaft portion is smaller than the shaft diameter of the second step shaft portion.

[0011] In some embodiments, a fixing member is provided inside the rotary encoder, one end of the fixing member is connected to the second rotating shaft through an opening, and the other end of the fixing member is connected to the rotary encoder.

[0012] In some embodiments, the second rotating shaft is provided with a slot, and one end of the fixing member is disposed in the slot and connected to the second rotating shaft.

[0013] In some embodiments, the fixing sleeve comprises:

[0014] The first sleeve is sleeved on the first rotating shaft and is slidably connected to the first rotating shaft. One end of the first sleeve is clamped on the step surface of the second rotating shaft, and the other end of the first sleeve is connected to the rotary encoder.

[0015] The second sleeve body is sleeved on the second sleeve body, one end of the second sleeve body is fixedly connected to the brake end surface of the brake, and the other end of the second sleeve body is connected to the rotary encoder.

[0016] In some embodiments, a first sealing member is provided at one end of the first sleeve, and one end of the first sleeve is clamped to the step surface of the second rotating shaft through the first sealing member;

[0017] The other end of the first sleeve is provided with a first limiting portion, and the first limiting portion of the first sleeve is clamped with the second sleeve.

[0018] In some embodiments, one end of the second sleeve includes a first limiting surface, the first limiting surface is connected to the brake surface of the encoder, and a second sealing member is provided between the first limiting surface and the brake surface.

[0019] In some embodiments, one end of the second sleeve body further includes a second limiting portion, and the second limiting portion is engaged with the axial hole at the brake end surface.

[0020] In some embodiments, a limiting groove is provided at the other end of the second sleeve, and a third limiting portion is provided at one end of the rotary encoder close to the second sleeve, and the third limiting portion is engaged with the limiting groove.

[0021] On the other hand, the present application provides a wind turbine generator set, comprising the above-mentioned encoder mounting structure.

[0022] The present application provides an encoder installation structure and a wind turbine generator set. The encoder installation structure connects the first rotating shaft and the second rotating shaft in a nested manner, so that the two are mutually limited in the axial direction, which is conducive to ensuring the connection reliability between the two, and the connection part of the first rotating shaft and the second rotating shaft is limited and supported by a fixed sleeve, so that the connection part of the first rotating shaft and the second rotating shaft is fixedly supported in the radial direction of the rotating shaft, which is conducive to further improving the connection stability between the first rotating shaft and the second rotating shaft; at the same time, the fixed sleeve connects the rotary encoder and the brake of the variable pitch motor into a stable overall structure, so that the connection between the rotary encoder and the variable pitch motor becomes more stable and reliable. Therefore, this embodiment can effectively avoid the situation of being stuck or damaged due to the bearing, reduce the impact of loosening or falling off due to vibration or impact, and is conducive to improving the overall working performance and life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0024] Figure 1 A schematic diagram of an encoder installation structure provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of a partial structural expansion of the encoder installation structure provided in an embodiment of the present application.

[0026] Description of reference numerals:

[0027] 10-first sealing member; 20-second sealing member; 100-rotary encoder; 110-first rotating shaft; 111-opening; 200-second rotating shaft; 210-step surface; 310-first sleeve; 320-second sleeve; 301-second limiting portion; 302-first mounting groove; 303-limiting groove; 400-brake; 401-brake end face; 402-positioning groove. DETAILED DESCRIPTION

[0028] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0029] Wind power generation components include variable pitch motors and rotary encoders. The main function of the variable pitch motor is to adjust the blade angle of the wind turbine. When the wind speed or wind direction changes, the variable pitch motor can accurately adjust the angle of the blades, so that the wind turbine can better adapt to wind conditions, achieve stable operation and optimize power generation efficiency. The brake is an important component of the variable pitch motor and is used to provide braking function when needed. The variable pitch motor and the brake work together to accurately adjust the blade angle to ensure stable operation of the unit and optimize power generation efficiency. The rotary encoder can detect and transmit the position information and speed information of the output spindle of the variable pitch motor in real time, so that the parameters such as the rotation angle and speed of the blades can be monitored, providing real-time feedback to the control system to ensure stable operation of the unit.

[0030] As mentioned in the background technology, the main shaft of the variable pitch motor of the wind turbine generator set is connected to the rotating shaft of the rotary encoder through a bearing. However, due to the influence of the wind environment during the operation of the wind turbine generator set, such as sudden changes in wind speed and wind direction, the wind turbine generator set will inevitably produce jitter and vibration, which will cause torque and load changes at the bearing connection. As the wind turbine operation time increases, the above situation continues to occur or occurs frequently, which is easy to cause stress concentration at the bearing between the main shaft of the variable pitch motor and the rotary encoder, thereby causing bearing wear, and easily causing damage and jamming of the bearing between the rotary encoder and the variable pitch motor, so that the optional encoder cannot work normally.

[0031] In view of the above technical problems, an embodiment of the present application provides an encoder installation structure, which includes a rotary encoder, a motor and a fixed sleeve. The first rotating shaft of the rotary encoder (i.e., the rotating shaft of the rotary encoder) is provided with an opening, and the second rotating shaft of the variable pitch motor (i.e., the motor main shaft of the variable pitch motor) is fixedly connected to the first rotating shaft through the opening. The first rotating shaft and the second rotating shaft are mutually limited by a sleeve connection, which is conducive to ensuring that the two have a high degree of coaxiality; the encoder installation structure connects the rotary encoder to the variable pitch motor through the fixed sleeve, which can enhance the connection stability of the first rotating shaft and the second rotating shaft. At the same time, because the fixed sleeve surrounds and limits the connection between the first rotating shaft and the second rotating shaft, the shaft connection of the rotary encoder and the variable pitch motor at the connection has support and limitation, which ensures the connection stability between the two shafts and improves the anti-interference ability of the connection. Therefore, the embodiment of the present application avoids using a bearing to connect the first rotating shaft of the rotary encoder with the second rotating shaft of the variable pitch motor, and solves the problem of easy wear and damage of the rotary encoder in the wind turbine generator set due to the installation of the bearing in the prior art.

[0032] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0033] See also Figure 1 and Figure 2 As shown, an embodiment of the present application provides an encoder mounting structure, which is used to connect a rotary encoder 100 with a pitch motor. The encoder mounting structure includes a rotary encoder 100, a motor and a fixing sleeve.

[0034] The rotary encoder 100 has a first rotating shaft 110 therein, and the first rotating shaft 110 has an opening 111 arranged along the axial direction. The motor has a second rotating shaft 200 , which passes through the brake 400 and is fixedly connected to the first rotating shaft 110 through the opening 111 .

[0035] The first rotating shaft 110 is the rotating shaft of the rotary encoder 100, which is responsible for transmitting the rotational motion and converting it into a readable electrical signal. The rotary encoder 100 can monitor the position, rotation speed and angle of the first rotating shaft 110 in real time, so as to achieve precise control and monitoring. The second rotating shaft 200 is the motor main shaft of the variable pitch motor. The first rotating shaft 110 of the rotary encoder 100 is provided with an opening 111 structure, and the opening 111 extends along the axial direction of the first rotating shaft 110. Its length and aperture can be determined according to the size at the end of the second rotating shaft 200 of the variable pitch motor. The second rotating shaft 200 of the variable pitch motor can be installed in the opening 111 in a chimeric manner and fixedly connected to the first rotating shaft 110. In this way, the rotation of the first rotating shaft 110 can drive the rotation of the second rotating shaft 200. The rotary encoder 100 can monitor the rotation angle, rotation speed and other parameters of the blades through the first rotating shaft 110, provide real-time feedback for the wind power generation control system, and ensure the stable operation of the unit.

[0036] In some embodiments, the second shaft 200 and the opening 111 of the first shaft 110 are interference-fitted, which is beneficial to improving the connection stability. In addition, the second shaft 200 and the first shaft 110 can be fixedly connected by bolt connection, keyway connection, etc.

[0037] The fixing sleeve is sleeved on the second rotating shaft 200 , and the fixing sleeve is slidably connected to the second rotating shaft 200 . One end of the fixing sleeve is connected to the rotary encoder 100 , and the other end of the fixing sleeve is fixedly connected to the brake 400 .

[0038] It can be understood that the fixed sleeve has an inner cavity for accommodating the first rotating shaft 110 and the second rotating shaft 200, and the first rotating shaft 110 and the second rotating shaft 200 are connected in the inner cavity. The fixed sleeve is arranged on the outer periphery of the second rotating shaft 200, and the fixed sleeve can provide sufficient supporting force and fixing force for the connecting portion of the first rotating shaft 110 and the second rotating shaft 200. In other words, the outer periphery of the connecting portion of the first rotating shaft 110 and the second rotating shaft 200 matches the size of the inner cavity to reduce the gap between the fixed sleeve and the first rotating shaft 110, ensuring that the fixed sleeve and the first rotating shaft 110 can fit. When the first rotating shaft 110 drives the second rotating shaft 200 to rotate, the second rotating shaft 200 slides relative to the fixed sleeve, that is, the second rotating shaft 200 can rotate in the inner cavity of the fixed sleeve.

[0039] The fixed sleeve has two ends located in the axial direction of the first rotating shaft 110, one end of which is fixedly connected to the rotary encoder 100, and the other end is connected to the brake 400 of the pitch motor, so that the body of the rotary encoder 100 is fixedly connected to the pitch motor. In this way, the fixed sleeve fixes the body of the rotary encoder 100 on the outside and limits the second rotating shaft 200 on the inside to achieve the installation of the rotary encoder 100. Exemplarily, the inner fixed sleeves are all cylindrical in shape, and the fixed sleeve is coaxially arranged with the second rotating shaft 200, which facilitates the installation of the first rotating shaft 110 of the rotary encoder 100 and is also conducive to improving the installation stability of the rotary encoder 100.

[0040] The encoder installation structure of the embodiment of the present application connects the first rotating shaft 110 and the second rotating shaft 200 in a nested manner, so that the two are mutually limited in the axial direction, which is conducive to ensuring the reliability of the connection between the two, and the connection part of the first rotating shaft 110 and the second rotating shaft 200 is limited and supported by the fixing sleeve, so that the connection part of the first rotating shaft 110 and the second rotating shaft 200 is fixedly supported in the radial direction of the rotating shaft, which is conducive to further improving the connection stability between the first rotating shaft 110 and the second rotating shaft 200; at the same time, the fixing sleeve connects the rotary encoder 100 and the brake 400 of the variable pitch motor into a stable overall structure, so that the connection between the rotary encoder 100 and the variable pitch motor becomes more stable and reliable. Therefore, this embodiment can effectively avoid the situation of being stuck or damaged due to the bearing, reduce the influence of loosening or falling off due to vibration or impact, and is conducive to improving the overall working performance and life.

[0041] In some embodiments, the first rotating shaft 110 includes a first step shaft portion and a second step shaft portion connected to each other, the first step shaft portion is connected to the rotary encoder 100, the second step shaft portion is sleeved on the second rotating shaft 200 through the opening 111, and the fixed sleeve is sleeved on the second step shaft portion, wherein the shaft diameter of the first step shaft portion is smaller than the shaft diameter of the second step shaft portion.

[0042] The first step shaft portion is directly connected to the rotary encoder 100, and the rotary encoder 100 can directly and accurately read the rotational motion of the first step shaft portion, thereby ensuring the accuracy of measurement and the timeliness of response. The second step shaft portion is sleeved on the second rotating shaft 200 through an opening 111, realizing the linkage between the first rotating shaft 110 and the second rotating shaft 200, so that the rotational motion is effectively transmitted between the two rotating shafts, ensuring the coordinated operation of the entire mechanical system. The fixed sleeve is sleeved on the second step shaft portion, and its main function is to fix and support the second step shaft portion to prevent it from shaking or shifting during operation, which helps to ensure the stability of the rotating shaft, thereby improving the working accuracy and reliability of the entire rotary encoder 100.

[0043] The shaft diameter of the first step shaft portion is smaller than the shaft diameter of the second step shaft portion. The larger shaft diameter means that the first step shaft portion has a larger cross-sectional area, thereby being able to withstand greater torque and bending forces. This helps to enhance the overall structural strength of the shaft and prevent breakage or deformation during operation. At the same time, the larger shaft diameter means that the first step shaft portion has a larger cross-sectional area, thereby being able to withstand greater torque and bending forces, which helps to enhance the overall structural strength of the shaft and prevent breakage or deformation during operation. Since the shaft diameter of the first step shaft portion is larger, it can more effectively transmit the rotational force to the rotary encoder 100. This helps to reduce energy loss and improve the transmission efficiency of the entire mechanical system.

[0044] Therefore, the embodiment of the present application enhances the structural strength and stability of the rotary encoder 100 by designing a rotating shaft with two stepped shaft portions and the shaft diameter of the first stepped shaft portion is larger than that of the second stepped shaft portion, which is beneficial to improving the transmission efficiency of the first rotating shaft 110.

[0045] In some embodiments, a fixing member is disposed in the rotary encoder 100 , one end of the fixing member is connected to the second rotating shaft 200 through the opening 111 , and the other end of the fixing member is connected to the rotary encoder 100 .

[0046] Among them, one end of the fixing member is connected to the second rotating shaft 200 through the opening 111, that is, the fixing member fixes the second rotating shaft 200 through the opening 111 of the first rotating shaft 110 to prevent it from shifting or shaking during operation, which helps to reduce the impact of vibration or impact on the rotary encoder 100. In this way, even in a complex external environment, the rotary encoder 100 can maintain high measurement accuracy and stability. Therefore, the embodiment of the present application improves the measurement accuracy and stability of the rotary encoder 100, and also helps to reduce the impact of the external environment on the encoder performance.

[0047] The fixing member needs to have high strength and rigidity to ensure that it can work stably for a long time. In some embodiments, the fixing member adopts connecting members such as pins and bolts.

[0048] In some embodiments, the second rotating shaft 200 defines a slot, and one end of the fixing member is disposed in the slot and connected to the second rotating shaft 200 .

[0049] Among them, the groove body can provide a stable installation position for the fixing part, and the fixing part can be tightly embedded in the groove body and tightly combined with the second rotating shaft 200, which is not easy to loosen or shift, which is beneficial to improve the stability of the rotary encoder 100 during operation and reduce the measurement error caused by the shaking of the parts. At the same time, through the cooperation between the groove body and the fixing part, the connection between the second rotating shaft 200 and the rotary encoder 100 is more secure, which is beneficial for the first rotating shaft 110 to withstand greater torque and vibration, so that the rotary encoder 100 can maintain good performance even in harsh working environments.

[0050] Therefore, the embodiment of the present application is conducive to improving the stability and measurement accuracy of the rotary encoder 100 by providing a slot body on the second rotating shaft 200 and connecting it to the fixing member. For example, the slot body is a recessed groove structure such as a threaded hole or a pin hole.

[0051] In some embodiments, the fixing sleeve includes a first sleeve body 310 and a second sleeve body 320 .

[0052] The first sleeve 310 is sleeved on the first rotating shaft 110 and is slidably connected to the first rotating shaft 110 . One end of the first sleeve 310 is clamped on the step surface 210 of the second rotating shaft 200 , and the other end of the first sleeve 310 is connected to the rotary encoder 100 .

[0053] The first sleeve 310 is slidably connected to the first rotating shaft 110, so that the first rotating shaft 110 can rotate in the first sleeve 310 while maintaining a stable connection state. One end of the first sleeve 310 is clamped on the step surface 210 of the second rotating shaft 200. In this way, it can be ensured that the first sleeve 310 will not be separated from the second rotating shaft 200 during the rotation process, and the other end of the first sleeve 310 is connected to the rotary encoder 100, which can achieve the fixing or limiting of the first sleeve 310, such as the first sleeve 310 is limited between the step surface 210 of the second rotating shaft 200 and the end surface of the rotary encoder 100. Of course, in some embodiments, when the first sleeve 310 is installed to the predetermined position, the first sleeve 310 can be fixedly connected to the second sleeve 320.

[0054] The second sleeve 320 is sleeved on the first sleeve 310 , one end of the second sleeve 320 is fixedly connected to the brake end surface 401 of the brake 400 , and the other end of the second sleeve 320 is connected to the rotary encoder 100 .

[0055] The pitch motor has a brake 400, one end of the second sleeve 320 is connected to the brake 400, and the other end is connected to the rotary encoder 100, so that the rotary encoder 100 and the pitch motor are connected as an integrated structure. The second sleeve 320 is sleeved on the first sleeve 310, which can provide support and fixing for the first sleeve 310, which is conducive to enhancing the connection stability between the rotary encoder 100 and the pitch motor.

[0056] Therefore, in this embodiment, the fixed sleeve is a structure composed of a first sleeve body 310 and a second sleeve body 320. This structure provides a more flexible and stable support and connection method, which helps to improve the overall performance and stability of the rotary encoder 100.

[0057] In some embodiments, a first sealing member 10 is disposed at one end of the first sleeve 310 , and one end of the first sleeve 310 is clamped to the step surface 210 of the second rotating shaft 200 through the first sealing member 10 .

[0058] The first sleeve 310 is located inside the second sleeve 320. The first sleeve 310 is connected to the step surface 210 of the second shaft 200 through the first seal 10 at one end close to the first shaft 110. In other words, the second shaft 200 has a stepped portion. On the one hand, the stepped shaft can prevent impurities from entering the encoder through the gap between the shaft and the fixed sleeve; on the other hand, in the axial direction of the shaft, the stepped shaft can limit the installation distance, which is convenient for the installer to control the installation position of the first shaft 110 and the second shaft 200, so as to determine whether they are installed in place. At the same time, the stepped second shaft 200 can also limit the radial movement of the first shaft 110, which is conducive to improving the connection stability between the two.

[0059] It can be understood that the first seal 10 is clamped between the second rotating shaft 200 and the first sleeve 310, and the first seal 10 can effectively prevent the brake powder and other impurities generated during the braking process of the brake 400 from entering the rotary encoder 100 through the gap between the rotating shaft and the outer fixed sleeve. Exemplarily, the first seal 10 is a lip seal ring, and its unique lip design enables the lip seal ring to fit tightly between the second rotating shaft 200 and the first sleeve 310, further improving the sealing performance between the encoder and the motor.

[0060] A first limiting portion is disposed at the other end of the first sleeve 310 , and the first limiting portion of the first sleeve 310 is clamped to the second sleeve 320 .

[0061] The first limiting portion is disposed at one end of the first sleeve 310 close to the rotary encoder 100, and the first sleeve 310 is engaged with the second sleeve 320 through the first limiting portion. Through the above structure, the second sleeve 320 can limit the first sleeve 310 in the axial direction of the main shaft or the axial direction of the rotating shaft, which is conducive to improving the connection stability between the first sleeve 310 and the second sleeve 320.

[0062] Exemplarily, the first sleeve 310 is sleeved on the outer circumference of the first rotating shaft 110, and a limiting protrusion is provided on the end thereof close to the rotary encoder 100, and the limiting protrusion may have a specific shape and size. The second sleeve 320 is sleeved on the outer circumference of the first sleeve 310, and a limiting groove 303 is provided on the end thereof close to the rotary encoder 100. The shape and size of the limiting groove 303 match the shape of the limiting protrusion to ensure that the two can be accurately snapped together. In other words, the limiting groove 303 forms a limiting table at the end of the first sleeve 310 close to the rotary encoder 100, and the limiting protrusion can be snapped on the limiting table. In the axial direction of the second rotating shaft 200 or the axial direction of the first rotating shaft 110, the second sleeve 320 can limit the first sleeve 310; at the same time, the limiting groove 303 can also further limit the limiting protrusion on the outer circumference of the first sleeve 310 in the radial direction. Therefore, the limiting protrusion and the limiting groove 303 are helpful to improve the connection stability between the first sleeve 310 and the first sleeve 310, so that the first sleeve 310 can provide more stable limiting and support for the second rotating shaft 200 and the first rotating shaft 110. Optionally, the limiting protrusion includes but is not limited to an annular shape, a fan shape or a rectangular shape. During the installation process, the first sleeve 310 is inserted into the inner cavity of the second sleeve 320 from the side close to the rotary encoder 100, and the limiting protrusion is clamped in the limiting groove 303 along the insertion direction, and a stable connection between the first sleeve 310 and the second sleeve 320 is achieved by clamping.

[0063] In order to further seal the connection between the fixed sleeve and the brake 400, in some embodiments, one end of the second sleeve 320 includes a first limit surface, the first limit surface is connected to the brake end surface 401 of the encoder, and a second seal 20 is provided between the first limit surface and the brake end surface 401.

[0064] Specifically, a first limiting surface is designed at one end of the second sleeve 320. This limiting surface is tightly connected to the brake end face 401 of the rotary encoder 100 to form a stable connection interface. This design not only improves the structural strength of the connection, but also provides a basis for subsequent sealing measures. A second seal 20 is added between the first limiting surface and the brake end face 401. The main function of this seal is to fill the tiny gap between the two to prevent external impurities such as dust and moisture from entering the connection. Through the provision of the second seal 20, the connection between the fixed sleeve and the brake 400 becomes tighter and more reliable, thereby ensuring the effective braking of the rotating part by the brake 400.

[0065] In practical applications, this optimization measure can significantly improve the stability and durability of the rotary encoder 100. Since the joints are effectively sealed, the rotary encoder 100 can better resist the influence of the external environment and reduce failures and damage caused by the entry of impurities. At the same time, the brake 400 can also work more stably, ensuring that the rotating part can be quickly stopped or positioned when needed.

[0066] Therefore, in this embodiment, by optimizing the design of one end of the second sleeve 320 and adding the second seal 20, the connection between the fixed sleeve and the brake 400 is better sealed and fixed. This design not only improves the overall performance of the rotary encoder 100, but also provides a strong guarantee for its stable operation in various harsh environments.

[0067] Exemplarily, the second sealing member 20 is an O-ring, and the brake end face 401 of the brake 400 or the end face of the first housing 310 facing the brake end face 401 is provided with a first mounting groove 302, and the O-ring is provided in the first mounting groove 302. The O-ring forms an effective sealing barrier between the rotary encoder 100 and the pitch motor, which can effectively prevent external dust, moisture and other impurities from entering the interior of the mounting structure, thereby improving the sealing performance between the rotary encoder 100 and the pitch motor, and further ensuring the normal operation and long-term stability between the rotary encoder 100 and the pitch motor.

[0068] In order to further improve the connection stability between the encoder and the pitch motor, one end of the second sleeve 320 further includes a second limiting portion 301 , and the second limiting portion 301 is engaged with the shaft hole at the brake end surface 401 .

[0069] It should be noted that the shaft hole is a hole structure or a groove structure opened axially along the second rotating shaft 200 on the brake end face 401. The provision of the second limiting portion 301 enables the second sleeve 320 to fit more closely on the encoder brake end face 401 during connection, and to be firmly connected to the shaft hole by snapping. This connection method not only improves the stability of the connection, but also effectively prevents loosening or falling off caused by vibration or impact. By adding the second limiting portion 301 and snapping it with the shaft hole, the connection between the encoder and the variable pitch motor is more reliable, thereby ensuring the stability and accuracy of the rotary encoder 100 during operation, which is of great significance for improving the performance and reliability of the entire system.

[0070] Exemplarily, the pitch motor has a brake 400, a brake end face 401 of the brake 400 is provided with a positioning groove 402, and a positioning protrusion is provided at one end of the second sleeve 320 facing the brake end face 401, and the positioning protrusion is snapped into the positioning groove. It can be understood that the brake 400 provided by the pitch motor, the brake end face 401 of the brake 400 is designed with a positioning groove, and the shape and size of the positioning groove match the positioning protrusion at one end of the second sleeve 320. During installation, the positioning protrusion is snapped into the positioning groove, thereby achieving a stable connection between the second sleeve 320 and the brake 400. Through this structure, the encoder mounting structure is not only connected to the rotary encoder 100, but also connected to the pitch motor as a whole through the brake 400, forming a stable overall structure.

[0071] Furthermore, the positioning protrusion and the positioning groove are both in a ring shape. It can be understood that the ring shape design can provide a larger contact area and enhance the stability of the connection on the one hand, and can better disperse the force and reduce the risk of damage caused by stress concentration on the other hand.

[0072] Furthermore, in some embodiments, a limiting groove 303 is provided at the other end of the second sleeve 320 , and a third limiting portion is provided at one end of the rotary encoder 100 close to the second sleeve 320 , and the third limiting portion is engaged with the limiting groove 303 .

[0073] Among them, the limiting groove 303 can provide a clear installation position for the rotary encoder 100, and also limit the moving range of the rotary encoder 100 through the physical structure, thereby enhancing the stability of the connection. A third limiting portion is provided at one end of the rotary encoder 100 close to the second sleeve 320. This limiting portion matches the limiting groove 303 on the second sleeve 320, and the rotary encoder 100 and the second sleeve 320 are tightly connected together by a snap-on method. This snap-on method is not only easy to install, but also has a firm connection and can effectively resist external vibration and impact. By adding the limiting groove 303 and the third limiting portion, the connection stability and reliability between the rotary encoder 100 and the second sleeve 320 are further improved.

[0074] The present application also provides a wind turbine generator set, comprising the above-mentioned encoder installation structure. It can be understood that the wind turbine generator set has the beneficial effects of the above-mentioned encoder installation structure, which will not be described in detail.

[0075] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the utility model disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0076] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. An encoder installation structure, characterized in that: include: A rotary encoder (100), wherein a first rotating shaft (110) is provided inside the rotary encoder (100), and the first rotating shaft (110) is provided with an opening (111) arranged along the axial direction; A motor, wherein the motor is provided with a second rotating shaft (200), wherein the second rotating shaft (200) passes through the brake (400) and is fixedly connected to the first rotating shaft (110) through the opening (111); A fixed sleeve is sleeved on the second rotating shaft (200), and the fixed sleeve is slidably connected to the second rotating shaft (200), one end of the fixed sleeve is connected to the rotary encoder (100), and the other end of the fixed sleeve is fixedly connected to the brake (400).

2. The encoder installation structure according to claim 1, characterized in that: The first rotating shaft (110) comprises a first step shaft portion and a second step shaft portion which are connected to each other, the first step shaft portion is connected to the rotary encoder (100), the second step shaft portion is sleeved on the second rotating shaft (200) through the opening (111), and the fixing sleeve is sleeved on the second step shaft portion, wherein the shaft diameter of the first step shaft portion is smaller than the shaft diameter of the second step shaft portion.

3. The encoder installation structure according to claim 1, characterized in that: A fixing member is provided inside the rotary encoder (100), one end of the fixing member is connected to the second rotating shaft (200) through the opening (111), and the other end of the fixing member is connected to the rotary encoder (100).

4. The encoder installation structure according to claim 3, characterized in that: The second rotating shaft (200) is provided with a slot body, and one end of the fixing member is arranged in the slot body and connected to the second rotating shaft (200).

5. The encoder installation structure according to claim 4, characterized in that: The fixing sleeve comprises: A first sleeve (310) is sleeved on the first rotating shaft (110) and is slidably connected to the first rotating shaft (110); one end of the first sleeve (310) is clamped on the step surface (210) of the second rotating shaft (200); and the other end of the first sleeve (310) is connected to the rotary encoder (100); The second sleeve (320) is sleeved on the first sleeve (310), one end of the second sleeve (320) is fixedly connected to the brake end surface (401) of the brake (400), and the other end of the second sleeve (320) is connected to the rotary encoder (100).

6. The encoder installation structure according to claim 5, characterized in that: A first sealing member (10) is provided at one end of the first sleeve (310), and one end of the first sleeve (310) is clamped to the step surface (210) of the second rotating shaft (200) through the first sealing member (10); The other end of the first sleeve (310) is provided with a first limiting portion, and the first limiting portion of the first sleeve (310) is clamped to the second sleeve (320).

7. The encoder installation structure according to claim 5, characterized in that: One end of the second sleeve (320) comprises a first limiting surface, the first limiting surface is connected to the brake end surface (401) of the encoder, and a second sealing member (20) is provided between the first limiting surface and the brake end surface (401).

8. The encoder installation structure according to claim 7, characterized in that: One end of the second sleeve (320) further includes a second limiting portion (301), and the second limiting portion (301) is engaged with the shaft hole at the brake end surface (401).

9. The encoder installation structure according to claim 8, characterized in that: A limiting groove (303) is provided at the other end of the second sleeve (320), and a third limiting portion is provided at one end of the rotary encoder (100) close to the second sleeve (320), and the third limiting portion is snap-connected to the limiting groove (303).

10. A wind turbine generator set, characterized in that: Includes the encoder mounting structure as described in any one of claims 1 to 9.

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