A wind power test bench coupling

Abstract

The application discloses a wind power test bench coupling and relates to the technical field of test couplings. The wind power test bench coupling is used for connecting a test motor and a speed reducer and comprises a driving side assembly and a driven side assembly. The driving side assembly comprises a driving side outer gear ring, the driven side assembly comprises a driven side outer gear ring, the driving side outer gear ring, the driven side outer gear ring and an inner tooth sleeve are connected through a gear pair and transmit torque, the inner tooth sleeve is a circular ring type inner tooth sleeve, the inner circular surface of the circular ring of the inner tooth sleeve is provided with inner teeth, the left and right portions of the inner teeth are respectively engaged with the outer teeth on the driving side outer gear ring and the driven side outer gear ring, and the inner tooth sleeve can slide leftward and rightward on the driving side outer gear ring and the driven side outer gear ring. The two side outer gear rings of the wind power test bench coupling are connected with the transition flanges on the two sides through a mortise or an end face tooth, the strength is high, the coupling has the advantages of large torque transmission, automatic centering, convenient disassembly and assembly and high stability.

Description

Technical Field

[0001] This invention relates to the field of test coupling technology, specifically a wind power test bench coupling. Background Technology

[0002] Couplings are essential mechanical components that connect driving and driven shafts, transmitting torque to make both shafts rotate together. Wind power test bench couplings are generally used to test the lifespan of motors and reducers. In test bench workshops, where speeds are low but operating torques are relatively high, couplings are required to have high load-bearing capacity, forward and reverse rotation capabilities, and a certain range of angular and radial compensation with the object being tested. They must be able to connect and align quickly, and be easy to install, disassemble, lubricate, and have a long service life.

[0003] Existing commonly used drum-shaped gear coupling structures, such as Figure 6 As shown, the active end inner gear sleeve 31 is fitted onto the active end outer gear ring 30, and the driven end inner gear sleeve 32 is fitted onto the driven end outer gear ring 33. The active end inner gear sleeve 31 and the driven end inner gear sleeve 32 are connected by a reamed bolt D37, a spring washer 38, and a nut 39. O-ring seals 40 are respectively installed in the sealing grooves of the active and driven end inner gear sleeves. The end cap 34 is pressed onto the end faces of the active end inner gear sleeve 31 and the driven end inner gear sleeve 32 by bolts C35 and spring washers 36, and is respectively fitted onto the active end outer gear ring 30 and the driven end outer gear ring 33.

[0004] The disadvantages of existing drum-shaped gear couplings are:

[0005] The two halves of the coupling assembly are connected by reamed hole bolts. When transmitting large torques or bearing impact loads, the reamed hole bolts are prone to loosening or breaking, causing production accidents. Moreover, when replacing spare parts, disassembly and assembly are difficult, increasing the workload of inspection and maintenance, affecting the production efficiency of the rolling mill, and increasing the labor intensity of maintenance.

[0006] The internal gear ring is flange-type, and the tooth diameter differs significantly from the major diameter D of the internal gear ring. For couplings of the same specifications, the transmitted torque is small.

[0007] According to national or industry standards, the coupling is too small to meet the large working torque requirements of the test bench.

[0008] The existing utility model patent with publication number CN204284240U discloses an electrically insulated coupling, in which the internal gear ring has a through structure and can slide axially, facilitating the separation of the driving and driven ends. However, its material is insulating engineering plastic, making it unsuitable for wind power tests involving high torque. Furthermore, the existing method of creating an oil filling hole on the internal gear ring requires additional sealing with a plug, failing to effectively utilize the sliding structure. Therefore, this invention also proposes a method for sealing and opening the oil filling hole on the internal gear ring. Summary of the Invention

[0009] (a) Technical problems to be solved

[0010] To address the shortcomings of existing technologies, this invention provides a wind power test bench coupling, which solves the technical problems mentioned in the background section.

[0011] (II) Technical Solution

[0012] To achieve the above objectives, the present invention provides the following technical solution: a wind power test bench coupling for connecting a test motor and a reducer, comprising an active side assembly and a passive side assembly, wherein the active side assembly includes an active side external gear ring;

[0013] The passive-side component includes a passive-side external toothed ring;

[0014] The active-side external gear ring, the passive-side external gear ring, and the inner gear sleeve are connected by a gear pair and transmit torque.

[0015] The inner toothed sleeve is a circular inner toothed sleeve. The inner circular surface of the inner toothed sleeve is provided with internal teeth. The left and right parts of the internal teeth mesh with the external teeth on the active side outer toothed ring and the passive side outer toothed ring, respectively. The inner toothed sleeve can slide left and right on the active side outer toothed ring and the passive side outer toothed ring.

[0016] Preferably, the diameter of the tooth portion of the inner gear sleeve used for transmitting torque differs from the major diameter D of the inner gear ring by no more than 5-8%.

[0017] Preferably, the active side assembly includes an active side transparent cover, the passive side assembly includes a passive side transparent cover, and the two end faces of the inner toothed sleeve are respectively provided with threaded holes and mating stops, which are connected to the active side transparent cover and the passive side transparent cover respectively through the mating stops and bolts, and pressed onto the left and right end faces of the inner toothed sleeve.

[0018] Preferably, both the active-side and passive-side external toothed rings have external teeth on their stepped outer circumferences, and their outer end faces have tooth-clamping structures. The outer end faces of the external teeth have end face teeth.

[0019] Preferably, the active side assembly includes an active side transition flange, and the passive side assembly includes a passive side transition flange. The outer circumference of the active side transition flange and the passive side transition flange are provided with bolt holes for connecting to the test motor, and the inner end face is provided with a toothed structure or an end face tooth structure. They are connected to the active side outer tooth ring and the passive side outer tooth ring respectively by screws and toothed structures or end face teeth.

[0020] Preferably, the active side assembly includes an active side pressure ring, the passive side assembly includes a passive side pressure ring, the inner holes of the active side cover and the passive side cover are provided with sealing grooves and mating inner stops, the active side pressure ring and the passive side pressure ring are respectively installed in the inner stops of the cover, and are respectively connected to the two side pressure rings by bolts, and the lip seal is pressed into the sealing groove of the cover and pressure ring combination.

[0021] Preferably, the active side-view cover and active side-pressure ring, as well as the passive side-view cover and passive side-pressure ring, are all separate designs that form a combined pressure cover.

[0022] Preferably, the active-side external gear ring, the passive-side external gear ring, and the internal gear ring have a module greater than 20, a small number of teeth, and a pressure angle α of 25° to 30°.

[0023] Preferably, the active-side external gear ring, the passive-side external gear ring, and the internal gear ring are heat-treated.

[0024] Preferably, the inner toothed sleeve is provided with an oil filling hole, and a sealing plate is provided in the oil filling hole. The sealing plate can move left and right on the vertical plane of the oil filling hole axis.

[0025] The sealing plate is provided with a left push rod and a right push rod at its left and right ends, respectively. The sealing plate is provided with an oil filling port. When the sealing plate moves to the left, the oil filling port can connect to the oil filling hole. When the sealing plate moves to the right, the sealing plate can block the oil filling hole.

[0026] Blind holes are provided on both the left and right sides of the refueling hole;

[0027] A left pressure ball is slidably disposed in the blind hole on the left side. The upper end of the left pressure ball is connected to a left connecting rod. A left protrusion is disposed on the right side of the left connecting rod. A left pressure spring is disposed at the upper end of the left connecting rod. The left pressure ball can move upward. When the left pressure ball moves upward, the left protrusion can also move upward. When the left protrusion moves upward, it can push the left push rod to the right.

[0028] A right pressure ball is slidably disposed in the blind hole on the right side. The upper end of the right pressure ball is connected to a right connecting rod. A right protrusion is disposed on the left side of the right connecting rod. A right pressure spring is disposed at the upper end of the right connecting rod. The right pressure ball can move upward. When the right pressure ball moves upward, the right protrusion can also move upward. When the right protrusion moves upward, it can push the right push rod to the left.

[0029] When the internal gear ring slides to the left, the active side external gear ring can push the left contact ball upward;

[0030] When the internal gear ring slides to the right, the passive side external gear ring can push the right touch ball upward.

[0031] (III) Beneficial Effects

[0032] This invention provides a coupling for a wind power test bench. It has the following advantages:

[0033] (1) The external gear rings on both sides of the coupling of the wind power test bench are connected to the transition flanges on both sides by toothed inserts or end face teeth. It has high strength, large torque transmission, automatic centering, convenient disassembly and assembly, and high stability.

[0034] (2) The through cover and pressure ring connected to both ends of the coupling and the inner gear sleeve of the wind power test bench are split to form a combined pressure cover. The lip seal ring is installed in the sealing groove of the combined pressure cover, which can not only realize the online replacement of the sealing of vulnerable parts, shorten the maintenance downtime, reduce the maintenance labor intensity, but also has good sealing performance.

[0035] (3) The gear parameters of the external gear ring and internal gear sleeve of the wind power test bench coupling adopt a large module m>20, a small number of teeth, a pressure angle α of 25°~30°, a large diameter centering, and the internal and external teeth need to be heat treated, such as tempering, nitriding, carburizing and quenching, to improve the load-bearing capacity and wear resistance of the teeth.

[0036] (4) The coupling of the wind power test bench is equipped with a sliding trigger structure on the inner side of the internal gear ring and a sealing plate with a through hole. When the internal gear ring moves to the left, the active side external gear ring on the left can trigger the sliding trigger structure, causing the sealing plate to move to the right and block the oiling hole. When the internal gear ring moves to the right, the passive side external gear ring on the right can trigger the sliding trigger structure, causing the sealing plate to move to the left and the through hole of the sealing plate to connect the oiling hole. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of a wind power test bench coupling according to the present invention;

[0038] Figure 2 This is a detailed drawing of the dental inlay of the present invention;

[0039] Figure 3 This is a detailed view of the end face teeth of the present invention;

[0040] Figure 4 This is a detailed view (tooth profile) of the end face teeth of the present invention;

[0041] Figure 5 This is a schematic diagram of a wind power test bench coupling cover according to the present invention;

[0042] Figure 6 This is a schematic diagram of an existing drum-shaped gear coupling;

[0043] Figure 7 This is a schematic diagram of the internal gear sleeve structure of the present invention;

[0044] Figure 8for Figure 7 View A in the middle;

[0045] Figure 9 for Figure 7 A magnified view of section B in the image (with the inner toothed sleeve in the middle);

[0046] Figure 10 This is a schematic diagram of the structure of the inner gear sleeve and the outer gear ring (the inner gear sleeve moves to the left);

[0047] Figure 11 This is a schematic diagram of the internal gear sleeve and the external gear ring (the internal gear sleeve moves to the right);

[0048] Figure 12 This is a schematic diagram of the sealing plate structure.

[0049] Figure 6 In the middle section: 30. External gear ring of the driving end; 31. Internal gear sleeve of the driving end; 32. Internal gear sleeve of the driven end; 33. External gear ring of the driven end; 34. End cap; 35. Bolt C; 36. Spring washer; 37. Bolt D; 38. Spring washer; 39. Nut; 40. O-ring seal; 41. Oil plug;

[0050] Figures 1-5 as well as Figures 7-12 Components: 1. Screw; 2. Active side transition flange; 3. Active side external gear ring; 4. Active side pressure ring; 5. Active side transparent cover; 6. Internal gear sleeve; 61. Internal gear; 62. Notch; 63. Oil filling hole; 64. Sealing plate; 641. Left push rod; 642. Right push rod; 643. Oil filling port; 641a. Left contact ball; 642a. Left connecting rod; 643a. Left pressure spring; 644a. Left protrusion; 641b. Right contact ball; 642b. Right connecting rod; 643b. Right pressure spring; 644b. Right protrusion; 7. Bolt A; 8. Lip seal; 9. Bolt B; 10. Passive side external gear ring; 11. Passive side transition flange; 12. Passive side pressure ring; 13. Passive side transparent cover; 14. Plug. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] Example 1:

[0053] like Figures 1-5 A wind power test bench coupling for connecting a test motor and a reducer, including an active side assembly and a passive side assembly, wherein the active side assembly includes an active side external gear ring 3;

[0054] The passive-side component includes a passive-side external toothed ring 10;

[0055] The active-side external gear ring 3, the passive-side external gear ring 10, and the internal gear sleeve 6 are connected and transmit torque through a gear pair;

[0056] The inner gear sleeve 6 is a circular inner gear sleeve. The inner circular surface of the inner gear sleeve 6 is provided with internal teeth. The left and right parts of its internal teeth mesh with the external teeth on the active side outer gear ring 3 and the passive side outer gear ring 10, respectively. The inner gear sleeve 6 can slide left and right on the active side outer gear ring 3 and the passive side outer gear ring 10.

[0057] in:

[0058] The diameter of the teeth of the inner gear sleeve 6 used for transmitting torque differs from the major diameter D of the inner gear ring 6 by no more than 5-8%. For example, when the outer diameter of the inner gear ring 6 is 1000mm-2000mm, the thickness of the inner gear ring will be designed to be 50-80mm. The active side assembly includes an active side cover 5, and the passive side assembly includes a passive side cover 13. The two end faces of the inner gear sleeve 6 are respectively provided with threaded holes and mating stops. They are connected to the active side cover 5 and the passive side cover 13 respectively through the mating stops and bolts, and are pressed tightly on the left and right end faces of the inner gear sleeve 6. The active side outer gear ring 3 and the passive side outer gear ring 13 are also connected to the active side cover 5 and the passive side cover 13 respectively. The outer circle of the moving-side external gear ring 10 is provided with external teeth, and its outer end face is provided with a toothed structure. The outer end face of the external teeth is provided with end face teeth. The active-side assembly includes an active-side transition flange 2, and the passive-side assembly includes a passive-side transition flange 11. The outer circle of the active-side transition flange 2 and the passive-side transition flange 11 is provided with bolt holes for connection to the test motor, and the inner end face is provided with a toothed structure or an end face tooth structure. They are connected to the active-side external gear ring 3 and the passive-side external gear ring 10 respectively by screws 1 and toothed structures or end face teeth. The active-side assembly includes an active-side pressure ring 4 and a passive-side assembly. The component assembly includes a passive side pressure ring 12, an active side transparent cover 5, and a passive side transparent cover 13. The inner bores of these two covers have sealing grooves and mating inner stops. The active side pressure ring 4 and the passive side pressure ring 12 are respectively installed within the inner stops of the transparent cover and connected to the two side pressure rings via bolts 9. A lip seal is pressed into the sealing groove of the transparent cover and pressure ring assembly. The active side transparent cover 5 and the active side pressure ring 4, as well as the passive side transparent cover 13 and the passive side pressure ring 12, are all separate designs forming a combined pressure cover. The active side external gear ring 3, the passive side external gear ring 10, and the internal gear ring 6 have a module greater than 20 and a pressure angle α. With a module of 25° to 30° and the pitch circle diameter remaining constant, choosing a module greater than 20 necessitates selecting a smaller number of teeth, thereby increasing the gear's load-bearing capacity and bending (fatigue) strength. Simultaneously, selecting a large pressure angle α of 25° to 30° is to improve the gear's wear resistance and increase allowable stress. The active-side external gear ring 3, the passive-side external gear ring 10, and the internal gear ring 6 undergo heat treatment, which may include one or more of the following methods: tempering, nitriding, carburizing, and quenching, to improve the gear's load-bearing capacity and wear resistance.

[0059] Example 2:

[0060] like Figures 7-12 Based on embodiment 1, an oil filling hole 63 is provided on the inner tooth sleeve 6, and a sealing plate 64 is provided inside the oil filling hole 63. The sealing plate 64 can move left and right on the vertical plane of the axis of the oil filling hole 63.

[0061] The sealing plate 64 is provided with a left push rod 641 and a right push rod 642 at its left and right ends respectively. The sealing plate 64 is provided with an oil filling port 643. When the sealing plate 64 moves to the left, the oil filling port 643 can connect the oil filling hole 63. When the sealing plate 64 moves to the right, the sealing plate 64 can block the oil filling hole 63.

[0062] Blind holes are provided on both the left and right sides of the filler hole 63;

[0063] A left pressure ball 641a is slidably disposed in the blind hole on the left side. The upper end of the left pressure ball 641a is connected to a left connecting rod 642a. A left protrusion 644a is disposed on the right side of the left connecting rod 642a. A left pressure spring 643a is disposed at the upper end of the left connecting rod 642a. The left pressure ball 641a can move upward. When the left pressure ball 641a moves upward, the left protrusion 644a can also move upward. When the left protrusion 644a moves upward, it can push the left push rod 641 to the right.

[0064] A right pressure ball 641b is slidably disposed in the blind hole on the right side. The upper end of the right pressure ball 641b is connected to a right connecting rod 642b. A right protrusion 644b is disposed on the left side of the right connecting rod 642b. A right pressure spring 643b is disposed on the upper end of the right connecting rod 642b. The right pressure ball 641b can move upward. When the right pressure ball 641b moves upward, the right protrusion 644b can also move upward. When the right protrusion 644b moves upward, it can push the right push rod 641 to the left.

[0065] When the internal gear ring 6 slides to the left, the active side external gear ring 3 can push the left contact ball 641a to move upward;

[0066] When the inner toothed ring 6 slides to the right, the passive side outer toothed ring 10 can push the right touch ball 641b to move upward.

[0067] in:

[0068] To prevent the center of gravity from shifting, multiple triggering mechanisms can be evenly distributed on the inner wall 6 of the internal gear ring.

[0069] To facilitate the installation of the sealing plate 64, a notch 62 is formed by removing the inner teeth of an area within the inner gear ring 6 that does not contact the active side outer gear ring 3 and the passive side outer gear ring 10 during operation. A groove is then cut within the notch, and a pressure block is machined. A sliding groove for the sealing plate 64 to slide left and right is machined in the pressure block or groove.

[0070] To ensure that the triggering mechanisms on both sides of the oil filling hole 3 can reset each other, the length of the sealing plate 64 should be longer than the groove it is located in.

[0071] Since the length of the sealing plate 64 should be longer than the slide groove, in order to prevent the left and right triggering mechanisms from being pressed down at the same time, the distance between the left and right triggering mechanisms should be greater than the width of either the active side outer toothed ring 3 or the passive side outer toothed ring 10, so as to facilitate installation.

[0072] During installation:

[0073] When selecting the passive side external gear ring 10 for installation, as the internal gear ring 6 moves from the right side of the passive side external gear ring 10 to the left, the left-side triggering mechanism will be triggered once due to contact with the passive side external gear ring 10. At this time, the oil filling hole 63 is in the closed state (e.g., Figure 10 When the filler hole 63 is closed, the right-side trigger mechanism will also be triggered once via the passive side outer gear ring 10 (e.g.). Figure 11 At this point, the oil filling hole 63 is in the open state. Continue to slide the internal gear ring 6 to the left, so that the internal teeth on the left side of the internal gear ring 6 engage with the active side external gear ring 3, and the oil filling operation can be performed. After the oil filling operation is completed, continue to slide the internal gear ring 6 to the left, so that the left trigger mechanism contacts the active side external gear ring 3 and triggers it again. At this point, the oil filling hole 63 is in the closed state. After the oil filling hole 63 is closed, move the internal gear ring 6 to the right to reset it to its original position. Figure 9 The state.

[0074] After installation, when lubrication is required, first slide the internal gear ring 6 to the right, causing the right trigger mechanism to contact the passive side external gear ring 10 and trigger it. At this time, the lubrication port 63 is in the open state, and lubrication can be performed. After the lubrication operation is completed, slide the internal gear ring 6 to the left to the reset position and then continue to slide it to the left, causing the left trigger mechanism to contact the active side external gear ring 3 and trigger it. At this time, the lubrication port 63 is in the closed state. Then return it to the original position. Figure 9 Once the refueling process is complete, the refueling operation will be finished.

[0075] It should be noted that in the description of the invention, the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the description of the structure of the invention shown in the accompanying drawings. They are only for the convenience of describing the invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0076] The terms "first" and "second" in this technical solution are merely designations for corresponding structures that are identical or similar, or that perform similar functions. They do not represent an arrangement of the importance of these structures, nor do they imply any ranking, comparison of size, or other meaning.

[0077] Furthermore, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two structures. Those skilled in the art can understand the specific meaning of the above terms in this invention by considering the overall concept of the invention and the specific context of the solution.

Claims

1. A wind power test bench coupling for connecting a test motor and a reducer, comprising an active side assembly and a passive side assembly, characterized in that: The active side assembly includes an active side external toothed ring (3); The passive side component includes a passive side external toothed ring (10). The active-side external gear ring (3), the passive-side external gear ring (10), and the internal gear sleeve (6) are connected by a gear pair and transmit torque. The inner tooth sleeve (6) is a circular inner tooth sleeve. The inner circular surface of the inner tooth sleeve (6) is provided with internal teeth. The left and right parts of its internal teeth respectively mesh with the external teeth on the active side outer tooth ring (3) and the passive side outer tooth ring (10). The inner tooth sleeve (6) can slide left and right on the active side outer tooth ring (3) and the passive side outer tooth ring (10). The inner toothed sleeve (6) is provided with an oil filling hole (63), and a sealing plate (64) is provided inside the oil filling hole (63). The sealing plate (64) can move left and right on the vertical plane of the axis of the oil filling hole (63). The sealing plate (64) is provided with a left push rod (641) and a right push rod (642) at its left and right ends respectively. The sealing plate (64) is provided with an oil filling port (643). When the sealing plate (64) moves to the left, the oil filling port (643) can connect the oil filling hole (63). When the sealing plate (64) moves to the right, the sealing plate (64) can block the oil filling hole (63). Blind holes are provided on both the left and right sides of the oil filling hole (63); A left pressure ball (641a) is slidably disposed in the blind hole on the left side. The upper end of the left pressure ball (641a) is connected to a left connecting rod (642a). A left protrusion (644a) is disposed on the right side of the left connecting rod (642a). A left pressure spring (643a) is disposed at the upper end of the left connecting rod (642a). The left pressure ball (641a) can move upward. When the left pressure ball (641a) moves upward, the left protrusion (644a) can also move upward. When the left protrusion (644a) moves upward, it can push the left push rod (641) to the right. A right pressure ball (641b) is slidably disposed in the blind hole on the right side. The upper end of the right pressure ball (641b) is connected to a right connecting rod (642b). A right protrusion (644b) is disposed on the left side of the right connecting rod (642b). A right pressure spring (643b) is disposed at the upper end of the right connecting rod (642b). The right pressure ball (641b) can move upward. When the right pressure ball (641b) moves upward, the right protrusion (644b) can also move upward. When the right protrusion (644b) moves upward, it can push the right push rod (641) to the left. When the inner toothed sleeve (6) slides to the left, the active side outer toothed ring (3) can push the left contact ball (641a) to move upward; When the inner toothed sleeve (6) slides to the right, the passive side outer toothed ring (10) can push the right touch ball (641b) to move upward.

2. The wind power test bench coupling according to claim 1, characterized in that: The diameter of the tooth used to transmit torque in the inner tooth sleeve (6) differs from the major diameter D of the inner tooth sleeve (6) by no more than 5~8%.

3. The wind power test bench coupling according to claim 1, characterized in that: The active side assembly includes an active side transparent cover (5), and the passive side assembly includes a passive side transparent cover (13). The two ends of the inner toothed sleeve (6) are respectively provided with threaded holes and mating stops. The inner toothed sleeve (6) is connected to the active side transparent cover (5) and the passive side transparent cover (13) respectively through the mating stops and bolts, and is pressed onto the left and right ends of the inner toothed sleeve (6).

4. The wind power test bench coupling according to claim 1, characterized in that: Both the active-side external toothed ring (3) and the passive-side external toothed ring (10) have external teeth on their stepped outer circles, and their outer end faces have tooth-clamping structures. The outer end faces of the external teeth have end face teeth.

5. A wind power test bench coupling according to claim 1, characterized in that: The active side assembly includes an active side transition flange (2), and the passive side assembly includes a passive side transition flange (11). The outer circle of the active side transition flange (2) and the passive side transition flange (11) is provided with bolt holes for connecting to the test motor, and the inner end face is provided with a toothed structure or an end face toothed structure. They are connected to the active side outer toothed ring (3) and the passive side outer toothed ring (10) respectively by screws (1) and toothed or end face teeth.

6. A wind power test bench coupling according to claim 3, characterized in that: The active side assembly includes an active side pressure ring (4), and the passive side assembly includes a passive side pressure ring (12). The inner holes of the active side cover (5) and the passive side cover (13) are provided with sealing grooves and mating inner stops. The active side pressure ring (4) and the passive side pressure ring (12) are respectively installed in the inner stops of the cover and are respectively connected to the two side pressure rings by bolts (9), and the lip seal is pressed into the sealing groove of the cover and pressure ring combination.

7. A wind power test bench coupling according to claim 6, characterized in that: The active side-view cover (5) and active side-pressure ring (4), as well as the passive side-view cover (13) and passive side-pressure ring (12), are all designed separately and form a combined cover.

8. A wind power test bench coupling according to claim 1, characterized in that: The active-side external gear ring (3), the passive-side external gear ring (10), and the inner gear sleeve (6) have a module greater than 20 and a pressure angle α of 25°~30°.

9. A wind power test bench coupling according to claim 8, characterized in that: The active-side external gear ring (3), the passive-side external gear ring (10), and the inner gear sleeve (6) are heat-treated.

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