Overload protection coupling suitable for wind power generation

Abstract

The utility model discloses an overload protection coupler suitable for wind power generation, which relates to the field of couplings, and comprises a connecting sleeve, a connecting inner ring and a shaft connecting component, and the connecting sleeve is sleeved outside the end part of the connecting inner ring; the connecting inner ring is fixedly connected with the shaft connecting assembly, and the inner wall of the connecting sleeve is convexly provided with a circle of limiting ring part towards the inner side; a step part is arranged on the outer side of the connecting inner ring, the step part is inserted into the connecting sleeve in a matched mode, and a first friction plate is connected between the step part and the limiting ring part in an abutting mode; a pressing disc is arranged on the side, away from the step part, of the limiting ring part, a second friction plate is connected between the pressing disc and the limiting ring part in an abutting mode, a belleville spring is connected to the side, away from the limiting ring part, of the pressing disc in an abutting mode, and the side, away from the pressing disc, of the belleville spring is connected to a spring pressing ring in an abutting mode. The spring pressing ring is detachably connected to the connecting inner ring. The dustproof cover has the advantages of being good in dustproof effect and long in service life.

Description

Technical Field

[0001] The utility model relates to the field of couplings, in particular to an overload protection coupling suitable for wind power generation. Background Art

[0002] A coupling is a transmission device that connects two shafts or other rotating parts. For example, in a wind turbine, the coupling transmits torque between the two shafts so that they rotate together.

[0003] Some existing couplings use friction plates for overload protection. Specifically, a wind power coupling slip protection device disclosed in the Chinese utility model patent with application number 2020204141300 is used for a coupling. The flange is connected to the inner ring by fastening bolts. The inner ring extends into the sliding joint. A first friction pad abuts between the inner ring and the inner side of the end face of the sliding joint. A second friction pad abuts between the flange and the outer side of the end face of the sliding joint. The flange and the inner ring are tightened by a disc spring to clamp the first friction pad, the second friction pad and the end face of the sliding joint. When the torque exceeds the friction torque between the inner ring and the sliding joint and the flange and the sliding joint, the sliding joint, the inner ring and the flange slide relative to each other, which plays a role in isolating the torque transmission and realizing overload protection.

[0004] When the above-mentioned slip protection device is used, the friction pad is exposed to the outside world, and external dust can easily enter between the friction plates to affect the normal transmission of the coupling, causing wear of the friction pad, which is not conducive to the service life of the coupling. Summary of the invention

[0005] The utility model aims to provide an overload protection coupling suitable for wind power generation, which has the advantages of good dustproof effect and long service life.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] The utility model provides an overload protection coupling suitable for wind power generation, the overload protection coupling comprises a connecting sleeve, a connecting inner ring and a shaft connecting assembly, one end of the connecting sleeve is sleeved outside the end of the connecting inner ring; one end of the connecting inner ring away from the connecting sleeve is fixedly connected to the shaft connecting assembly, and the shaft connecting assembly is used to connect a rotating shaft;

[0008] The inner wall of the connecting sleeve is provided with a circle of limiting ring part protruding inwardly; the outer side of the connecting inner ring is provided with a step part, the step part is inserted into the connecting sleeve and a first friction plate is abutted between the limiting ring part; a pressure plate is provided on the side of the limiting ring part away from the step part, a second friction plate is abutted between the pressure plate and the limiting ring part, the pressure plate is axially slidably provided on the connecting inner ring and circumferentially fixed to the connecting inner ring;

[0009] A disc spring is abutted on the side of the clamping disc away from the limiting ring portion, and a spring pressure ring is abutted on the side of the disc spring away from the clamping disc. The spring pressure ring is detachably connected to the connecting inner ring.

[0010] Furthermore, the overload protection coupling also includes an end cover, which is arranged outside the side of the spring compression ring away from the disc spring, the end cover is ring-shaped, the inner ring of the end cover is fixed to the connecting inner ring, and the outer ring of the end cover is sealed against the inner wall of the connecting sleeve.

[0011] Furthermore, a first annular groove is formed on the outer ring of the end cover along the circumferential direction, a first sealing ring is arranged in the first annular groove, and the first sealing ring abuts against the inner wall of the connecting sleeve.

[0012] Furthermore, a side surface of the end cover away from the spring compression ring is flush with the port of the connecting sleeve, and the inner ring of the end cover is fixed to the connecting inner ring by screws.

[0013] Furthermore, the clamping disk is a spline key, and the connecting inner ring cooperates with the clamping disk via a spline parallel to the axial direction of the clamping disk.

[0014] Furthermore, a first embedding groove is provided on one side of the step portion facing the inner wall of the connecting sleeve, the first embedding groove extends in an annular manner along the circumference of the step portion, and a first copper sheet ring is provided in the first embedding groove;

[0015] The outer peripheral side of the clamping plate is provided with a second annularly extending embedding groove, and a second copper sheet ring is arranged in the second embedding groove; the outer ring of the first copper sheet ring and the outer ring of the second copper sheet ring are both in contact with the inner wall of the connecting sleeve.

[0016] Furthermore, a first flange is coaxially connected to the outside of the connecting inner ring, and a port of the connecting sleeve close to the connecting inner ring faces the first flange; a second annular groove is provided on the side of the first flange facing the port of the connecting sleeve, a second sealing ring is provided in the second annular groove, and the second sealing ring abuts against the port of the connecting sleeve.

[0017] Furthermore, a spacer disc is connected to a side of the first flange away from the connecting sleeve, and a brake disc is connected to a side of the spacer disc away from the first flange.

[0018] Furthermore, a second flange is provided on the outer periphery of one end of the connecting sleeve away from the connecting inner ring.

[0019] Furthermore, the shaft connection assembly includes an inner tapered sleeve and an outer tapered sleeve, the inner tapered sleeve is fixed to one end of the connecting inner ring away from the connecting sleeve, the outer tapered sleeve is sleeved outside the inner tapered sleeve, the inner wall of the outer tapered sleeve is a cone that fits the outer wall of the inner tapered sleeve, and the outer tapered sleeve is fixedly connected to the inner tapered sleeve.

[0020] In summary, the utility model has the following beneficial effects:

[0021] 1. In the utility model, the shaft connection assembly is fixed to the connecting inner ring and is used to connect the input shaft or the output shaft; one end of the connecting sleeve is used to connect the diaphragm assembly or another connecting sleeve; one end of the connecting sleeve is sleeved outside the connecting inner ring, and a limiting ring portion is convexly provided inwardly, a first friction plate is provided between the step portion of the connecting inner ring and the limiting ring portion, and a second friction plate is provided between the clamping plate and the limiting ring portion; the spring pressure ring is fixed to the connecting inner ring and presses the disc spring, so that the disc spring acts on the clamping plate, and the clamping plate is axially slidably provided on the connecting inner ring, so that the clamping plate and the step portion jointly clamp the first friction plate, the connecting inner ring and the second friction plate; At the same time, the clamping plate is circumferentially fixed to the connecting inner ring, so that under the action of the friction force of the clamping plate and the step portion, the connecting inner ring and the connecting sleeve rotate together; when the torque exceeds the limit, the step portion or the clamping plate slips relative to the limiting ring portion to achieve overload protection; wherein, the first friction plate and the second friction plate are respectively located on both sides of the limiting ring portion, and the step portion closes the port of the connecting sleeve when it is inserted into the connecting sleeve, thereby isolating the first friction plate and the second friction plate from the outside world, and dust and impurities from the outside world are not easy to enter the first friction plate and the second friction plate, thereby improving the dustproof effect of the first friction plate and the second friction plate, which is beneficial to extending the service life of the coupling.

[0022] 2. The end cover is arranged at the end of the spring compression ring away from the spring, the inner ring of the end cover is fixed to the connecting inner ring, and the outer ring of the end cover is sealed against the inner wall of the connecting sleeve through the first sealing ring, so that the end cover, the connecting inner ring and the connecting sleeve together enclose a closed space to accommodate the first friction plate and the second friction plate, thereby further improving the dustproof effect.

[0023] 3. The pressure plate is a spline keyway, and the connecting inner ring cooperates with the pressure plate through a spline extending axially along the pressure plate, so that the pressure plate can slide axially relative to the connecting inner ring, so that the disc spring can drive the pressure plate to press the second friction plate; at the same time, the pressure plate rotates synchronously with the connecting inner ring, and then the friction force between the pressure plate and the second friction plate is transmitted to the connecting inner ring, so as to facilitate the transmission of torque between the connecting inner ring and the connecting sleeve.

[0024] 4. A first copper ring and a second copper ring are respectively arranged on the step portion and the outer periphery of the clamping plate. The first copper ring and the second copper ring are in contact and friction with the connecting sleeve to reduce the wear between the connecting inner ring and the clamping plate and the connecting sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the vertical cross-sectional structure of an overload protection coupling according to an embodiment of the utility model.

[0026] Figure 2 yes Figure 1 Enlarged structural diagram at A in the middle.

[0027] Figure 3 yes Figure 1 Enlarged structural diagram at B in the middle.

[0028] In the figure:

[0029] 1000, overload protection coupling; 100, connecting sleeve; 110, limiting ring; 120, second flange; 200, connecting inner ring; 210, step portion; 211, first embedding groove; 212, first copper ring; 220, extension portion; 230, spring pressure ring; 240, disc spring; 250, clamping plate; 251, second embedding groove; 252, second copper ring; 260, first flange; 261, second annular groove; 262, second sealing ring; 300, shaft connection assembly; 310, inner tapered sleeve; 320, outer tapered sleeve; 400, first friction plate; 500, second friction plate; 600, end cover; 610, first annular groove; 620, first sealing ring; 700, spacer plate; 800, brake disc. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings.

[0031] In this embodiment, a coordinate axis X is provided, wherein the positive direction of the X axis represents the left direction, and the negative direction of the X axis represents the right direction.

[0032] It should be noted that the directional terms such as left, right, inside, outside, etc. in the embodiments are merely relative concepts or are based on the normal use status of the product and should not be considered as restrictive.

[0033] This embodiment discloses an overload protection coupling 1000 suitable for wind power generation, referring to Figures 1 to 3 The overload protection coupling 1000 includes a connecting sleeve 100, a connecting inner ring 200 and a shaft connecting assembly 300. The right end of the connecting sleeve 100 is sleeved outside the end of the connecting inner ring 200. The end of the connecting inner ring 200 away from the connecting sleeve 100 is fixedly connected to the shaft connecting assembly 300, and the shaft connecting assembly 300 is used to connect the rotating shaft.

[0034] The connecting sleeve 100 is cylindrical in shape as a whole, and a circle of limiting ring 110 is protruded inwardly from the inner wall of the connecting sleeve 100. The limiting ring 110 is coaxially arranged with the connecting sleeve 100 and formed integrally, and there is a certain distance between the limiting ring 110 and the left and right ports of the connecting sleeve 100 (that is, the limiting ring 110 is not located at the port of the connecting sleeve 100), so that the limiting ring 110 is completely covered by the connecting sleeve 100.

[0035] The outer side of the connecting inner ring 200 has a step portion 210, the outer peripheral surface of the step portion 210 faces the inner wall of the connecting sleeve 100, and the left end surface of the step portion 210 faces the limiting ring portion 110. The step portion 210 is inserted into the connecting sleeve 100, that is, the outer peripheral shape of the step portion 210 is the same as the inner wall shape of the connecting sleeve 100, and the outer peripheral diameter of the step portion 210 is slightly smaller than the inner diameter of the connecting sleeve 100, so that the step portion 210 can be inserted into the connecting sleeve 100. The end surface of the step portion 210 facing the limiting ring portion 110 is abutted against the limiting ring portion 110 by a first friction plate 400.

[0036] The connecting inner ring 200 further includes an extension portion 220, which is connected to the inner side of the step portion 210 and extends into the connecting sleeve 100 in a direction away from the step portion 210, and the limiting ring portion 110 is located on the outer side of the extension portion 220. A spring pressure ring 230 is detachably connected to the extension portion 220 by screws, and the spring pressure ring 230 is located on the side of the limiting ring portion 110 away from the step portion 210. A pressure plate 250 is provided on the side of the limiting ring portion 110 away from the step portion 210, and a disc spring 240 is abutted between the side of the pressure plate 250 away from the limiting ring portion 110 and the spring pressure ring 230, and a second friction plate 500 is abutted between the pressure plate 250 and the limiting ring portion 110.

[0037] The clamping plate 250 is axially slidably disposed on the extension portion 220 connected to the inner ring 200 and is circumferentially fixed to the extension portion 220. That is, the clamping plate 250 can slide axially relative to the extension portion 220, and cannot rotate circumferentially relative to the extension portion 220. Therefore, when the screws connecting the extension portion 220 and the spring pressure ring 230 are tightened, the spring pressure ring 230 compresses the disc spring 240 in the direction close to the limiting ring portion 110, and the disc spring 240 acts on the clamping plate 250, so that the clamping plate 250 presses the second friction plate 500 against the limiting ring portion 110, and at the same time, the step portion 210 and the limiting ring portion 110 clamp the first friction plate 400. The clamping plate 250 and the step portion 210 clamp the first friction plate 400, the connecting inner ring 200 and the second friction plate 500 together, increasing the friction between the connecting inner ring 200 and the connecting sleeve 100. At the same time, the clamping plate 250 is circumferentially fixed to the connecting inner ring 200, so that the connecting inner ring 200 rotates together with the connecting sleeve 100 under the friction of the clamping plate 250 and the step portion 210. When the torque exceeds the limit, the step portion 210 or the clamping plate 250 slips relative to the limiting ring portion 110, realizing the overload protection of the coupling.

[0038] Among them, since the first friction plate 400 and the second friction plate 500 are respectively located on both sides of the limiting ring portion 110, the step portion 210 closes the port of the connecting sleeve 100 when it is inserted into the connecting sleeve 100, thereby isolating the first friction plate 400 and the second friction plate 500 from the outside world, and dust and impurities from the outside world are not easy to enter the first friction plate 400 and the second friction plate 500, thereby improving the dust-proof effect of the first friction plate 400 and the second friction plate 500, which is beneficial to extending the service life of the overload protection coupling 1000.

[0039] In this embodiment, the clamping disc 250 is a splined disc, and a spline groove is provided on the inner ring of the clamping disc 250. A spline is provided on the outer periphery of the extension portion 220 connected to the inner ring 200, and the spline on the extension portion 220 parallel to the axial direction of the clamping disc 250 cooperates with the spline groove of the clamping disc 250, so that the clamping disc 250 can slide axially relative to the inner ring 200, and the clamping disc 250 can rotate synchronously with the inner ring 200.

[0040] Reference Figure 1 and Figure 2 A first embedding groove 211 is provided on the outer peripheral surface of the step portion 210 facing the inner wall of the connecting sleeve 100. The first embedding groove 211 extends in a ring shape along the circumference of the step portion 210. A first copper ring 212 is provided in the first embedding groove 211. The outer ring of the first copper ring 212 abuts against the inner wall of the connecting sleeve 100.

[0041] The outer peripheral side of the clamping plate 250 is provided with a second embedding groove 251 extending in an annular manner, and a second copper ring 252 is provided in the second embedding groove 251, and the outer ring of the second copper ring 252 abuts against the inner wall of the connecting sleeve 100. Thus, the first copper ring 212 and the second copper ring 252 are in contact and friction with the connecting sleeve 100, thereby reducing the wear between the connecting inner ring 200 and the clamping plate 250 and the connecting sleeve 100.

[0042] Reference Figure 1 and Figure 3 The end of the extension part 220 away from the step part 210 is provided with an end cover 600, and the end cover 600 is arranged outside the side of the spring compression ring 230 away from the disc spring 240. The end cover 600 is annular, and the inner ring of the end cover 600 is fixed to the extension part 220, and the outer ring of the end cover 600 is sealed against the inner wall of the connecting sleeve 100. Thus, the end cover 600 covers the end of the disc spring 240 away from the limiting ring part 110, so that the end cover 600, the connecting inner ring 200 and the connecting sleeve 100 together enclose a closed space to accommodate the first friction plate 400 and the second friction plate 500, further improving the dustproof effect.

[0043] The outer ring of the end cover 600 is provided with a first annular groove 610 along the circumferential direction. A first sealing ring 620 is arranged in the first annular groove 610 . The first sealing ring 620 abuts against the inner wall of the connecting sleeve 100 , thereby achieving sealing between the end cover 600 and the inner wall of the connecting sleeve 100 .

[0044] Among them, the side surface of the end cover 600 away from the spring compression ring 230 is flush with the left port of the connecting sleeve 100, so that the left side of the overload protection coupling 1000 is flat and the structure is more compact and reasonable.

[0045] In this embodiment, the inner circle of the end cover 600 is fixed to the extension portion 220 by screws to facilitate the disassembly and assembly of the end cover 600. In addition, in other embodiments, the end cover 600 can also be connected to the extension portion 220 in other suitable ways.

[0046] Reference Figure 1 and Figure 2, the outer periphery of the connecting inner ring 200 is coaxially connected with a first flange 260, the first flange 260 is located outside the connecting sleeve 100, and the port of the connecting sleeve 100 close to the connecting inner ring 200 faces the first flange 260. The first flange 260 can be used to connect other structures outside the connecting inner ring 200 to increase the function of the overload protection coupling 1000. A second annular groove 261 is provided on the side of the first flange 260 facing the port of the connecting sleeve 100, and a second sealing ring 262 is provided in the second annular groove 261, and the second sealing ring 262 abuts against the port edge of the connecting sleeve 100. In this way, the outer ring of the cavity enclosed by the connecting inner ring 200, the end cover 600 and the connecting sleeve 100 is sealed, further enhancing the dustproof and waterproof effect of the first friction plate 400 and the second friction plate 500.

[0047] In this embodiment, a spacer disc 700 is connected to the side of the first flange 260 away from the connecting sleeve 100, and a brake disc 800 is connected to the side of the spacer disc 700 away from the first flange 260. The rotation of the coupling can be stopped by friction braking the brake disc 800.

[0048] A second flange 120 is provided on the outer periphery of the connecting sleeve 100 away from the inner ring 200. The second flange 120 can be used to connect the diaphragm assembly of the overload protection coupling 1000, or to connect with the second flange 120 of the other half coupling, and the two rotating shafts are connected through the two half couplings.

[0049] The shaft connection assembly 300 includes an inner tapered sleeve 310 and an outer tapered sleeve 320. The inner tapered sleeve 310 is fixed to one end of the inner ring 200 away from the connection sleeve 100, and the outer tapered sleeve 320 is sleeved outside the inner tapered sleeve 310. The inner tapered sleeve 310 extends in a direction away from the inner ring 200. The outer peripheral side of the inner tapered sleeve 310 is in a conical shape with a diameter gradually decreasing in the direction away from the inner ring 200. The inner wall of the outer tapered sleeve 320 is a cone that matches the outer wall of the inner tapered sleeve 310. The outer tapered sleeve 320 is fixedly connected to the inner tapered sleeve 310 by screws, and the outer tapered sleeve 320 is used to connect the rotating shaft. When the screws connecting the outer tapered sleeve 320 and the inner tapered sleeve 310 are tightened, the outer tapered sleeve 320 is tightly fixed to the inner tapered sleeve 310, thereby realizing the connection between the rotating shaft and the overload protection coupling 1000.

[0050] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. An overload protection coupling suitable for wind power generation, characterized in that: The overload protection coupling (1000) comprises a connecting sleeve (100), a connecting inner ring (200) and a shaft connecting assembly (300), wherein one end of the connecting sleeve (100) is sleeved outside the end of the connecting inner ring (200); one end of the connecting inner ring (200) away from the connecting sleeve (100) is fixedly connected to the shaft connecting assembly (300), and the shaft connecting assembly (300) is used to connect a rotating shaft; The inner wall of the connecting sleeve (100) is provided with a circle of limiting ring portion (110) protruding inwardly; the outer side of the connecting inner ring (200) is provided with a step portion (210), the step portion (210) is inserted into the connecting sleeve (100) and a first friction plate (400) is abutted between the step portion (210) and the limiting ring portion (110); a pressure plate (250) is provided on the side of the limiting ring portion (110) away from the step portion (210), a second friction plate (500) is abutted between the pressure plate (250) and the limiting ring portion (110), and the pressure plate (250) is axially slidably arranged on the connecting inner ring (200) and circumferentially fixed to the connecting inner ring (200); The side of the clamping plate (250) facing away from the limiting ring portion (110) is abutted against a disc spring (240), and the side of the disc spring (240) away from the clamping plate (250) is abutted against a spring pressure ring (230), and the spring pressure ring (230) is detachably connected to the connecting inner ring (200).

2. The overload protection coupling suitable for wind power generation according to claim 1, characterized in that: The overload protection coupling (1000) further comprises an end cover (600), wherein the end cover (600) is arranged outside a side of the spring compression ring (230) away from the disc spring (240), the end cover (600) is ring-shaped, the inner ring of the end cover (600) is fixed to the connecting inner ring (200), and the outer ring of the end cover (600) is sealingly abutted against the inner wall of the connecting sleeve (100).

3. The overload protection coupling suitable for wind power generation according to claim 2, characterized in that: The outer ring of the end cover (600) is provided with a first annular groove (610) along the circumferential direction, a first sealing ring (620) is arranged in the first annular groove (610), and the first sealing ring (620) abuts against the inner wall of the connecting sleeve (100).

4. The overload protection coupling suitable for wind power generation according to claim 2, characterized in that: A side surface of the end cover (600) away from the spring compression ring (230) is flush with the port of the connecting sleeve (100), and the inner ring of the end cover (600) is fixed to the connecting inner ring (200) by screws.

5. The overload protection coupling suitable for wind power generation according to claim 1, characterized in that: The clamping disc (250) is a splined plate, and the connecting inner ring (200) cooperates with the clamping disc (250) via a spline parallel to the axial direction of the clamping disc (250).

6. The overload protection coupling suitable for wind power generation according to claim 1, characterized in that: A first embedding groove (211) is provided on one side of the step portion (210) facing the inner wall of the connecting sleeve (100), the first embedding groove (211) extends in an annular shape along the circumference of the step portion (210), and a first copper sheet ring (212) is provided in the first embedding groove (211); A second annularly extending embedding groove (251) is provided on the outer peripheral side of the clamping disk (250), and a second copper sheet ring (252) is provided in the second embedding groove (251); the outer ring of the first copper sheet ring (212) and the outer ring of the second copper sheet ring (252) are both in contact with the inner wall of the connecting sleeve (100).

7. The overload protection coupling suitable for wind power generation according to claim 1, characterized in that: The connecting inner ring (200) is coaxially connected to a first flange (260) on the outside, and a port of the connecting sleeve (100) close to the connecting inner ring (200) faces the first flange (260); a second annular groove (261) is provided on the side of the first flange (260) facing the port of the connecting sleeve (100), a second sealing ring (262) is provided in the second annular groove (261), and the second sealing ring (262) abuts against the port of the connecting sleeve (100).

8. The overload protection coupling suitable for wind power generation according to claim 7, characterized in that: A spacer disc (700) is connected to a side of the first flange (260) away from the connecting sleeve (100), and a brake disc (800) is connected to a side of the spacer disc (700) away from the first flange (260).

9. The overload protection coupling suitable for wind power generation according to claim 1, characterized in that: A second flange (120) is provided on the outer periphery of one end of the connecting sleeve (100) away from the connecting inner ring (200).

10. The overload protection coupling suitable for wind power generation according to claim 1, characterized in that: The shaft connection assembly (300) comprises an inner tapered sleeve (310) and an outer tapered sleeve (320), wherein the inner tapered sleeve (310) is fixed to one end of the connecting inner ring (200) away from the connecting sleeve (100), and the outer tapered sleeve (320) is sleeved outside the inner tapered sleeve (310), and the inner wall of the outer tapered sleeve (320) is a cone that matches the outer wall of the inner tapered sleeve (310), and the outer tapered sleeve (320) is fixedly connected to the inner tapered sleeve (310).

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