Ring-running-preventing mounting structure for wind power gear box bearing

Abstract

The invention discloses a wind power gear box bearing anti-running ring mounting structure in the technical field of wind power gear box structures, and the wind power gear box bearing anti-running ring mounting structure comprises a gear box body, a high-speed output shaft is arranged in the gear box body, and the output end of the high-speed output shaft is rotationally mounted on the side wall of the gear box body through a bearing; a mounting groove is formed in the inner side wall of the gear box body, a temperature sensing fastening mechanism is arranged in the mounting groove, the bottom face of the temperature sensing fastening mechanism abuts against the bearing outer ring, and when temperature rises, static friction is increased through self-expansion to limit rotation of the bearing outer ring. Through the design of the mounting structure, on one hand, lossless mounting of the bearing structure can be achieved, the problem of ring running is solved, and on the other hand, the service life of the bearing and the main shaft can be prolonged due to the fact that the internal stress of the fastening mechanism in the thermal expansion working state can be released after cold contraction.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power gearbox structures, and particularly to an anti-rotation installation structure for bearings of a wind power gearbox. Background Technique

[0002] The gearbox in a wind power generating set is an important mechanical component. Its main function is to transmit the power generated by the wind turbine under the action of wind to the generator and enable it to obtain the corresponding rotational speed. Usually, the rotational speed of the wind turbine is very low, far from reaching the rotational speed required for the generator to generate electricity. It must be achieved through the speed-increasing effect of the gear pair in the gearbox. Therefore, the gearbox is also called a speed-increasing box.

[0003] Bearings are key components in a wind power gearbox. "Bearing running" refers to the relative movement between the outer ring of the bearing and the bearing housing or between the inner ring and the shaft. This phenomenon not only causes the planetary gears of the gearbox to run, but may also cause irreparable damage to the gearbox.

[0004] At present, during the operation of the unit, it has been successively found that there is a situation where the outer ring of the high-speed shaft bearing of the gearbox runs. There is a certain risk in the operation of the gearbox; in the prior art, maintenance technicians of the unit restrict the running of the outer ring of the bearing by punching positioning pins or flat keys on the gear, such as the anti-high-temperature running device for the bearing of a wind power generating set in Chinese Patent CN216045379U. Although the purpose of restricting running is achieved in the short term, on the one hand, the installation of the pin or flat key requires the bearing to be damaged for installation, which affects the later replacement and maintenance of the bearing with standard parts; on the other hand, the original torque acting on the bearing by the main shaft forms a reaction force after the outer ring of the bearing is rigidly fixed, resulting in the accumulation of stress on the main shaft itself, thus affecting the mechanical life of the main shaft.

[0005] Based on this, the present invention designs an anti-rotation installation structure for bearings of a wind power gearbox to solve the above problems. Summary of the Invention

[0006] The purpose of the invention is to provide an anti-rotation installation structure for bearings of a wind power gearbox to solve the above technical problems.

[0007] To achieve the above purpose, the invention provides the following technical solution: an anti-rotation installation structure for bearings of a wind power gearbox, including a gearbox body. A high-speed output shaft is arranged in the gearbox body, and the output end of the high-speed output shaft is rotatably installed on the side wall of the gearbox body through a bearing; an installation groove is opened on the inner side wall of the gearbox body, and a temperature-sensitive fastening mechanism is arranged in the installation groove. The bottom surface of the temperature-sensitive fastening mechanism abuts against the outer ring of the bearing and increases the static friction through self-expansion when heated to restrict the rotation of the outer ring of the bearing.

[0008] Preferably, the temperature-sensitive fastening mechanism includes a friction contact block, a temperature conduction member, and a temperature-sensitive expansion and contraction block. The temperature conduction member includes a partition plate. A lower temperature conduction column is connected to the bottom surface of the partition plate. The lower end of the lower temperature conduction column penetrates through the friction contact block and is flush with the bottom surface of the friction contact block. An upper temperature conduction column is connected to the top surface of the partition plate. The upper temperature conduction column penetrates through the temperature-sensitive expansion and contraction block and is in fitting contact with the inside of the temperature-sensitive expansion and contraction block.

[0009] Preferably, an arc-shaped fitting surface adapted to the outer wall of the bearing outer ring is provided on the bottom surface of the friction contact block. A temperature conduction jack is formed through the top surface of the friction contact block.

[0010] Preferably, a plurality of temperature conduction fins are circumferentially and arrayedly distributed on the outer wall of the upper temperature conduction column of the temperature conduction member. A temperature conduction hole adapted to the upper temperature conduction column and the plurality of temperature conduction fins is formed inside the temperature-sensitive expansion and contraction block.

[0011] Preferably, guiding inclined surfaces are respectively provided on the left and right sides of the temperature-sensitive expansion and contraction block. The two guiding inclined surfaces form a trapezoidal structure that is narrow at the top and wide at the bottom. The inner cavity of the installation groove is set to a trapezoidal structure adapted to the guiding inclined surfaces.

[0012] Preferably, the friction contact block is made of a composite brake pad material.

[0013] Preferably, the temperature conduction member is made of a heat-conducting metal material, and the thermal conductivity coefficient is ≥401 W / m·K.

[0014] Preferably, the temperature-sensitive expansion and contraction block is made of a heat-expandable metal material, and the thermal expansion coefficient is ≥23×10 -6 / °C.

[0015] Preferably, the gear box body includes an upper box body and a lower box body. Bearing holes adapted to the bearings are provided at the connection of the side walls of the upper box body and the lower box body. End edges are provided on the upper and lower sides of the bearing holes. The installation groove is formed on the end edge.

[0016] Preferably, a positioning and installation member for fixing the temperature-sensitive fastening mechanism is further included. The positioning and installation member includes a U-shaped pressing plate. Screw holes are provided at both ends of the U-shaped pressing plate. A vertically bent limiting tab is provided on one side of the U-shaped pressing plate, and a horizontally extending supporting gasket is provided on the other side.

[0017] Compared with the prior art, the beneficial effects of the invention are as follows:

[0018] The anti-creeping installation structure of the bearing of the wind power gearbox of the present invention is provided with a temperature-sensitive fastening mechanism on the upper and lower sides of the bearing seat of the gearbox body. The bottom surface of the temperature-sensitive fastening mechanism abuts against the outer ring of the bearing, and when the temperature rises, the static friction is increased through self-expansion to limit the rotation of the outer ring of the bearing. Through the design of this installation structure, on the one hand, the problem of bearing structure lossless installation and anti-creeping can be solved. On the other hand, considering that the internal stress of the fastening mechanism under the working state of thermal expansion can be released after cold contraction, it is beneficial to improve the service life of the bearing and the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 is a three-dimensional schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a front schematic diagram of the overall structure of the present invention;

[0022] Figure 3 is a side schematic diagram of the overall structure of the present invention;

[0023] Figure 4 is a schematic diagram of the structure of the temperature-sensitive fastening mechanism of the present invention Figure 1 ;

[0024] Figure 5 is a schematic diagram of the structure of the temperature-sensitive fastening mechanism of the present invention Figure 2 . DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the invention with reference to the drawings in the embodiments of the invention. Obviously, the described embodiments are only some, rather than all, of the embodiments of the invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the invention without creative efforts fall within the scope of protection of the invention.

[0026] The invention provides a technical solution:

[0027] Please refer to Figures 1 - 3 , a wind power gearbox bearing anti-creeping installation structure, including a gearbox body 10, the gearbox body 10 includes an upper box body 11 and a lower box body 12, a bearing hole 13 adapted to a bearing 30 is provided at the connection of the side walls of the upper box body 11 and the lower box body 12, and end edges 14 are provided on the upper and lower sides of the bearing hole 13.

[0028] Inside the gear box body 10, a high-speed output shaft 20 is provided. The output end of the high-speed output shaft 20 is rotationally installed on the side wall of the gear box body 10 through a bearing 30. In this embodiment, a bearing seal 80 is provided outside the bearing 30, and a limit end cover is provided outside the bearing seal 80, forming a complete bearing seal installation structure.

[0029] Installation grooves 40 are formed on the inner side wall of the gear box body 10. The installation grooves 40 are arranged on the edge 14 on the upper and lower sides of the bearing hole 13. A temperature-sensitive fastening mechanism 50 is arranged in the installation grooves 40. The bottom surface of the temperature-sensitive fastening mechanism 50 abuts against the outer ring of the bearing 30, and when heated, the static friction is increased by self-expansion to limit the rotation of the outer ring of the bearing 30. In this embodiment, two sets of installation grooves 40 and temperature-sensitive fastening mechanisms 50 are provided, which are symmetrically distributed up and down. Actually, the quantity can be adjusted according to the materials used and the working conditions.

[0030] Please refer to Figures 4 - 5 , the temperature-sensitive fastening mechanism 50 includes a friction contact block 51, a heat conduction member 52, and a temperature-sensitive expansion and contraction block 53;

[0031] The friction contact block 51 is made of a composite brake pad material. The composite brake pad material contains a variety of molecules that are heat-resistant and can provide a large static friction force. The bottom surface of the friction contact block 51 is provided with an arc-shaped fitting surface 511 adapted to the outer wall of the outer ring of the bearing 30, which increases the contact area and thus improves the friction force. During actual operation, as the heat conduction member 52 expands and presses down, the friction contact block 51 fully abuts against the outer wall of the outer ring of the bearing 30, providing a strong friction force to limit the bearing 30 from running;

[0032] The heat conduction member 52 includes a partition plate 521. A lower heat conduction column 522 is connected to the bottom surface of the partition plate 521. The lower end of the lower heat conduction column 522 penetrates through the friction contact block 51 and is flush with the bottom surface of the friction contact block 51. A heat conduction insertion hole 512 is formed through the top surface of the friction contact block 51 for the lower end of the lower heat conduction column 522 to be inserted and installed. During operation, it can smoothly transfer the heat generated by the bearing to the temperature-sensitive expansion and contraction block 53 in time;

[0033] An upper heat conduction column 523 is connected to the top surface of the partition plate 521. The upper heat conduction column 523 penetrates through the temperature-sensitive expansion and contraction block 53 and is in fitting contact with the inside of the temperature-sensitive expansion and contraction block 53. A plurality of heat conduction fins 524 are arranged in a circumferential array on the outer wall of the upper heat conduction column 523 of the heat conduction member 52. The heat conduction fins 524 are beneficial to increasing the heat conduction contact surface and improving the heat exchange efficiency;

[0034] The temperature-sensitive expansion and contraction block 53 is internally provided with a heat conduction hole 531 adapted to the upper heat conduction column 523 and a plurality of heat conduction fins 524. The temperature-sensitive expansion and contraction block 53 is made of a thermal expansion metal material, and the thermal expansion coefficient ≥ 23×10 -6 / °C. In this embodiment, taking an aluminum material with a thermal expansion coefficient of 23×10 -6 / °C as an example, the thermal expansion performance is not less than 23×10-6 / °C can meet the basic material property requirements;

[0035] The heat conduction member 52 is made of a heat conductive metal material with a thermal conductivity ≥ 401 W / m·K. In this embodiment, a copper material with a thermal conductivity of 401 W / m·K is taken as an example. A thermal conductivity not less than 401 W / m·K can meet the basic material property requirements;

[0036] Guide inclined surfaces 532 are respectively arranged on the left and right sides of the temperature-sensitive expansion block 53. The two guide inclined surfaces 532 form a trapezoidal structure that is narrow at the top and wide at the bottom. The inner cavity of the installation groove 40 is set as a trapezoidal structure adapted to the guide inclined surfaces 532. When the temperature-sensitive expansion block 53 expands due to heat, since the thermal expansion coefficient of the temperature-sensitive expansion block 53 is much larger than that of the side wall of the installation groove 40, therefore, in addition to the expansion and extension of the temperature-sensitive expansion block 53 itself in the height direction, a downward acting force that is squeezed can also be generated based on the inclined surface of the installation groove 40, further enhancing the thermal expansion effect, and thus ensuring sufficient braking friction.

[0037] It further includes a positioning and installation member 60 for fixing the temperature-sensitive fastening mechanism 50. The positioning and installation member 60 includes a C-shaped pressing plate 61. Screw holes are arranged at both ends of the C-shaped pressing plate 61. The temperature-sensitive fastening mechanism 50 can be fixedly installed on the end edge 14 through screws. A vertically bent limiting tab 62 is arranged on one side of the C-shaped pressing plate 61, and a horizontally extending supporting gasket 63 is arranged on the other side. The limiting tab 62 restricts the temperature-sensitive fastening mechanism 50 from slipping laterally, and the supporting gasket 63 abuts against the installation groove 40 and the temperature-sensitive fastening mechanism 50, which is beneficial to the balanced transmission of pressure.

[0038] Working principle

[0039] As shown in the appendix Figures 1 - 3As shown, an installation groove 40 is formed on the inner side wall of the gear housing 10, and a temperature-sensitive fastening mechanism 50 is arranged in the installation groove 40. When the wind power engine starts, the high-speed output shaft 20 rotates at a high speed accordingly; in the initial stage of starting, the bearing 30 is mainly positioned and fixed by an interference fit installation between the gear housing 10 and the bearing 30; however, as the wind power engine works continuously for a long time, the temperatures of the bearing 30 and the gear housing 10 also increase. Since the thermal expansion coefficients of different materials are different, and with the high-frequency vibration of the high-speed output shaft 20 itself, the assembly tightness between the bearing 30 and the gear housing 10 gradually decreases, thus resulting in the aforementioned phenomenon of the outer ring of the bearing running. After the temperature-sensitive fastening mechanism 50 is installed on the gear housing 10 and during actual operation, as the temperature of the bearing 30 increases, since the lower temperature conduction column 522 at the bottom of the temperature conduction member 52 contacts the outer wall of the bearing 30 and the upper temperature conduction column 523 at the top penetrates through the temperature-sensitive expansion and contraction block 53 and is in fitting contact with the inside of the temperature-sensitive expansion and contraction block 53, the continuous heat generated by the bearing can be quickly conducted to the temperature-sensitive expansion and contraction block 53, and the temperature of the temperature-sensitive expansion and contraction block 53 also gradually increases, and its thermal expansion effect becomes gradually obvious, and the volume size gradually increases; thus, it presses the friction contact block 51 downward, so that the bottom surface of the friction contact block 51 is fully abutted against the outer wall of the outer ring of the bearing 30, providing a strong frictional force to limit the running of the bearing 30; moreover, the longer the working time and the higher the working temperature, the greater the downward pressure generated by the temperature-sensitive fastening mechanism 50, thereby realizing the effect of preventing running through structural self-adaptation; the temperature-sensitive fastening mechanism 50 is installed in contact with the bearing 30 in an additional installation form, and the problem of running can be solved by a non-destructive installation of the bearing structure. In addition, since the temperature-sensitive expansion and contraction block 53 of the temperature-sensitive fastening mechanism 50 can recover cold contraction after cooling, the stress generated inside under the thermal expansion working state can be released when the equipment is suspended for maintenance or actively cooled externally, thereby preventing stress accumulation or concentration of the high-speed output shaft 20, which is beneficial to improving the service life of the bearing and the main shaft.

[0040] In the description of the invention, it should be understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the invention.

[0041] In the invention, unless otherwise clearly stipulated and defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0042] Although the embodiments of the invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An anti-rotation installation structure for a bearing of a wind power gearbox, characterized in that: It includes a gear box body (10), a high-speed output shaft (20) is arranged inside the gear box body (10), and the output end of the high-speed output shaft (20) is rotatably installed on the side wall of the gear box body (10) through a bearing (30); an installation groove (40) is formed on the inner side wall of the gear box body (10), a temperature-sensitive fastening mechanism (50) is arranged in the installation groove (40), the bottom surface of the temperature-sensitive fastening mechanism (50) abuts against the outer ring of the bearing (30), and when the temperature rises, the static friction is increased by self-expansion to limit the rotation of the outer ring of the bearing (30).

2. The anti-creep installation structure of a wind power gearbox bearing according to claim 1, wherein: The temperature-sensitive fastening mechanism (50) includes a friction contact block (51), a temperature conduction member (52) and a temperature-sensitive expansion and contraction block (53). The temperature conduction member (52) includes a partition plate (521), a lower temperature conduction column (522) is connected to the bottom surface of the partition plate (521), the lower end of the lower temperature conduction column (522) penetrates through the friction contact block (51) and is flush with the bottom surface of the friction contact block (51), an upper temperature conduction column (523) is connected to the top surface of the partition plate (521), and the upper temperature conduction column (523) penetrates through the temperature-sensitive expansion and contraction block (53) and is in fitting contact with the inside of the temperature-sensitive expansion and contraction block (53).

3. The anti-creep installation structure of a wind power gearbox bearing according to claim 2, characterized in that: An arc-shaped fitting surface (511) adapted to the outer wall of the outer ring of the bearing (30) is arranged on the bottom surface of the friction contact block (51), and a temperature conduction jack (512) is formed through the top surface of the friction contact block (51).

4. A wind power gearbox bearing anti-rotation installation structure according to claim 2, characterized in that: A plurality of temperature conduction fins (524) are arranged in a circumferential array on the outer wall of the upper temperature conduction column (523) of the temperature conduction member (52), and a temperature conduction hole (531) adapted to the upper temperature conduction column (523) and the plurality of temperature conduction fins (524) is formed inside the temperature-sensitive expansion and contraction block (53).

5. The anti-creep installation structure of a wind power gearbox bearing according to claim 2, characterized in that: Guide inclined surfaces (532) are respectively arranged on the left and right sides of the temperature-sensitive expansion and contraction block (53), and the two guide inclined surfaces (532) form a trapezoidal structure that is narrow at the top and wide at the bottom. The inner cavity of the installation groove (40) is set as a trapezoidal structure adapted to the guide inclined surfaces (532).

6. A wind power gearbox bearing anti-rotation installation structure according to claim 2, characterized in that: The friction contact block (51) is made of composite brake pad material.

7. The anti-creep installation structure of a wind power gearbox bearing according to claim 2, wherein: The temperature conduction member (52) is made of a heat-conducting metal material, and the heat conduction coefficient ≥ 401W / (m·K).

8. The anti-creep installation structure of a wind power gearbox bearing according to claim 2, characterized in that: The temperature-sensitive expansion and contraction block (53) is made of a thermal expansion metal material with a coefficient of thermal expansion ≥ 23×10 -6 / °C.

9. The anti-rotation installation structure of the bearing of a wind power gearbox according to claim 2, characterized in that: The gear box body (10) includes an upper box body (11) and a lower box body (12), a bearing hole (13) adapted to the bearing (30) is arranged at the connection of the side walls of the upper box body (11) and the lower box body (12), end edges (14) are arranged on the upper and lower sides of the bearing hole (13), and the installation groove (40) is formed on the end edge (14).

10. A wind power gearbox bearing anti-rotation installation structure according to claim 1, characterized in that: It further includes a positioning and installation member (60) for fixing the temperature-sensitive fastening mechanism (50). The positioning and installation member (60) includes a U-shaped pressing plate (61), screw holes are arranged at both ends of the U-shaped pressing plate (61), a vertically bent limiting stop piece (62) is arranged on one side of the U-shaped pressing plate (61), and a horizontally extending support gasket (63) is arranged on the other side.

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