Centering clamp for rotor destressing equipment

Abstract

The utility model discloses a centering fixture for rotor destressing equipment, which comprises a mounting bracket, a centering fixture body, a centering fixture body, a centering fixture body and a centering fixture body, the mounting bracket forms a mounting surface, and the normal direction of the mounting surface is the horizontal direction; the clamping assembly is used for clamping the rotor, opposite clamping faces are formed by the clamping assembly, and the axial direction of the rotor is the vertical direction; and the limiting assembly forms opposite limiting faces with the normal directions being the horizontal directions, the limiting faces limit the clamping faces to be close to each other, and the middle faces of the limiting faces coincide with the axis of the power element. The position of the left clamping jaw and the position of the right clamping jaw are limited through the left retainer and the right retainer respectively, the middle face coincides with the axis of the power element by adjusting the position of the limiting face, and the axis of the clamping face coincides with the axis of the power element. The position relation between the rotor and the power element is converted into the position relation between the clamping assembly and the limiting assembly relative to the power element, and therefore the installation difficulty of the rotor is reduced under the condition that the installation precision of the rotor is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of rotor stress relief technology, specifically to a centering clamp for rotor stress relief equipment. Background Technology

[0002] In recent years, with the rapid development of the new energy vehicle industry, the requirements for motor rotors have been continuously increasing. In particular, during the manufacturing process of motors with speeds of 16,000 r / min to 18,000 r / min or even higher, high-speed rotation tests are required on the rotor. After the rotor assembly is completed, the internal stress of the rotor is not fully released. When it is run at high speed for the first time on a dynamic balancing machine, the dynamic balance of the rotor will be disrupted. This imbalance will generate high-frequency vibration, which will affect the motor. Through high-speed rotation tests, the rotor can undergo a certain amount of plastic deformation under the action of a relatively large centrifugal force, so that the internal stress of the rotor can be fully released. As a result, when the rotor runs at this speed again, its imbalance will not change significantly, thereby extending its service life and reducing the motor failure rate.

[0003] When implementing the existing embodiments, the inventors of this application discovered that during the process of connecting the rotor to the power element of the rotor stress relief device using the clamping mechanism, the coaxiality deviation between the axis of the clamping cavity formed by the clamping mechanism for clamping the rotor and the axis of the rotor is large. This makes the position of the clamping mechanism relative to the power element unable to represent the position of the rotor relative to the power element. Consequently, when determining that the clamping mechanism and the power element are coaxial, it is impossible to determine that the rotor and the power element are coaxial, which increases the difficulty of determining whether the rotor and the power element are coaxial. Utility Model Content

[0004] This utility model addresses the problem of easily achieving coaxiality between the rotor and the power component by providing a centering fixture for a rotor stress-relieving device. The specific technical solution is as follows:

[0005] A centering fixture for a rotor stress relief device includes: a mounting bracket forming a mounting surface with a horizontal normal direction; a clamping assembly disposed on the mounting surface, forming opposing clamping surfaces for clamping the radially outer side of the rotor, the rotor's axial direction being vertical; and a limiting assembly disposed on the mounting surface, forming opposing limiting surfaces with horizontal normal directions, the limiting surfaces respectively preventing the clamping surfaces from approaching each other, the middle surface of the limiting surfaces coinciding with the axis of the power element.

[0006] Preferably, the clamping assembly includes: a guide rail disposed on the mounting surface, the length direction of the guide rail being horizontal; a left clamp and a right clamp respectively connected to the guide rail, the opposite surface of the left clamp and the right clamp being a clamping surface; and a movable cylinder connected to the left clamp and the right clamp, the movable cylinder being capable of driving the left clamp and the right clamp to move along the length direction of the guide rail.

[0007] Preferably, the limiting component includes: a left stop and a left buffer disposed on the mounting surface, one end face of the left stop facing the left gripper, the left stop being able to restrict the left gripper from moving to the right gripper; and a right stop and a right buffer disposed on the mounting surface, one end face of the right stop facing the right gripper, the right stop being able to restrict the right gripper from moving to the left gripper.

[0008] Preferably, both the left and right stop members can adjust their positions relative to the mounting surface, thereby adjusting the position of the middle surface of the limiting surface relative to the axis of the power element.

[0009] Preferably, the opposing surfaces of the left and right grippers are each formed with a gripper groove, the axis of which can coincide with the middle surface of the limiting surface.

[0010] Preferably, both the left and right buffer components are compression springs.

[0011] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0012] This invention restricts the positions of the left and right grippers by using left and right stoppers respectively, so that after the left and right grippers clamp the rotor, the axis of the clamping surface coincides with the middle surface of the limiting surface. By adjusting the position of the limiting surface, the middle surface coincides with the axis of the power element of the rotor stress relief device, and the axis of the clamping surface coincides with the axis of the power element. This transforms the positional relationship between the rotor and the power element into the positional relationship between the clamping assembly and the limiting assembly relative to the power element, thereby reducing the installation difficulty while ensuring the installation accuracy of the rotor. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0014] Figure 2 for Figure 1 Partial schematic diagram.

[0015] In the diagram: 1. Mounting bracket; 2. Clamping assembly; 3. Limiting assembly; 21. Moving cylinder; 22. Left gripper; 23. Right gripper; 24. Gripper groove; 25. Guide rail; 31. Left stop; 32. Left buffer; 33. Right stop; 34. Right buffer. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, 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 this utility model.

[0018] like Figure 1 As shown, the rotor stress relief device includes a power element for driving the rotor to rotate. This embodiment includes: a mounting bracket 1, which forms a mounting surface with the normal direction of the mounting surface being horizontal; a clamping assembly 2 disposed on the mounting surface, which forms opposing clamping surfaces for clamping the radially outer side of the rotor, with the rotor's axial direction being vertical; and a limiting assembly 3 disposed on the mounting surface, which forms opposing limiting surfaces with the normal direction of both being horizontal. The limiting surfaces can respectively restrict the clamping surfaces from approaching each other, and the middle surface of the limiting surface coincides with the axis of the power element.

[0019] Specifically, the mounting bracket 1 is a plate with a vertical side, which is fixedly connected to the clamping assembly 2 and the limiting assembly 3 by bolts; secondly, the clamping assembly 2 is used to clamp the rotor, wherein the opposite side of the clamping assembly 2 near the rotor is the clamping surface, so that the clamping surface is parallel to the axis of the rotor, and since the axis of the rotor is vertical, the clamping surface is vertical; secondly, the opposite side of the limiting assembly 3 is the limiting surface, which corresponds to the clamping surface and is used to limit the clamping assembly 2 from getting closer to each other, thereby limiting the clamping surface from getting closer to each other.

[0020] Secondly, both the limiting surface and the clamping surface are vertical surfaces, and the limiting surfaces are parallel to each other. After the clamping surface clamps the rotor, there is an axis. Specifically, the clamping surfaces are relatively close until the rotor is clamped. At this time, the axis of the clamping surface coincides with the middle surface of the limiting surface, and then coincides with the axis of the rotor. Thus, after the clamping assembly 2 clamps the rotor, the axis of the clamping assembly 2 coincides with the axis of the rotor. This makes the position of the clamping assembly 2 relative to the power element of the rotor stress relief device the position of the rotor relative to the power element. Therefore, it is only necessary to limit the coaxiality between the clamping assembly 2 and the power element to limit the coaxiality between the rotor and the power element, which simplifies the rotor installation process and improves the installation accuracy.

[0021] Furthermore, the clamping assembly 2 includes: a guide rail 25 disposed on the mounting surface, the length direction of the guide rail 25 being horizontal; a left clamping jaw 22 and a right clamping jaw 23 respectively connected to the guide rail 25, the opposite surfaces of the left clamping jaw 22 and the right clamping jaw being clamping surfaces; and a movable cylinder 21 connected to the left clamping jaw 22 and the right clamping jaw 23, the movable cylinder 21 being capable of driving the left clamping jaw 22 and the right clamping jaw 23 to move along the length direction of the guide rail 25.

[0022] Specifically, the guide rail 25 is bolted to the mounting surface. The left gripper 22 and the right gripper 23 are slidably connected to the guide rail 25, so that when the moving cylinder 21 contracts, it drives the left gripper 22 and the right gripper 23 to move closer to each other along the guide rail 25, and the clamping surfaces also move closer to each other, thereby coinciding with the radial outer surface of the rotor and clamping the rotor. This makes the axis of the clamping surface parallel to the axis of the rotor. When the axis of the clamping surface coincides with the middle surface of the limiting surface, the axis of the clamping surface is parallel to the axis of the rotor.

[0023] Combination Figure 2 As shown, the limiting component 3 includes: a left stop 31 and a left buffer 32 disposed on the mounting surface, one end face of the left stop 31 being opposite to the left gripper 22, and the left stop 31 being able to restrict the left gripper 22 from moving to the right gripper 23; and a right stop 33 and a right buffer 34 disposed on the mounting surface, one end face of the right stop 33 being opposite to the right gripper 23, and the right stop 33 being able to restrict the right gripper 23 from moving to the left gripper 22.

[0024] Specifically, the left stop 31 and the right stop 33 are fixedly connected to the mounting surface along the length of the guide rail 25, and the opposite end faces of the left stop 31 and the right stop 33 are respectively limiting surfaces. By adjusting the positions of the left stop 31 and the right stop 33, the deviation between the middle surface of the limiting surface and the axis of the rotor is adjusted until the middle surface coincides with the axis. Secondly, the left gripper 22 and the right gripper 23 move closer to each other under the drive of the moving cylinder 21, so that the left stop 31 can engage with the rotor. When the left gripper 22 overlaps, the right stop 33 can overlap with the right gripper 23, thereby making the middle surface of the limiting surface coincide with the axis of the clamping surface. Secondly, the left buffer 32 and the right buffer 34 can respectively prevent the left gripper 22 and the right gripper 23 from making direct hard contact with the left stop 31 and the right stop 33, causing damage. By absorbing vibration, the relative velocity of the left gripper 22 when it overlaps with the left stop 31 is zero, and the velocity of the right gripper 23 when it overlaps with the right stop 33 is zero.

[0025] Furthermore, both the left stop 31 and the right stop 33 can adjust their positions relative to the mounting surface, thereby adjusting the position of the middle surface of the limiting surface relative to the axis of the power element, and thus adjusting the position of the middle surface relative to the axis of the power element.

[0026] Specifically, both the left stop 31 and the right stop 33 can be adjusted by bolts to make the limiting surface move along the mounting surface, thereby making the middle surface gradually coincide with the axis of the rotor.

[0027] Furthermore, the opposing surfaces of the left gripper 22 and the right gripper 23 are each formed with a gripper groove 24, the axis of which can coincide with the middle surface of the limiting surface.

[0028] Specifically, the surface of the gripper groove 24 is a clamping surface, and the surface of the gripper groove 24 coincides with the radial outer surface of the rotor, so that the clamping surface coincides with the radial outer surface of the rotor, and thus the axis of the clamping surface coincides with the axis of the rotor. When the axis of the clamping surface coincides with the axis of the power element, the axis of the rotor can coincide with the axis of the power element. This transforms the positional relationship between the rotor and the power element into the positional relationship between the clamping surface and the power element, simplifying the installation difficulty of the rotor and improving the installation accuracy.

[0029] Furthermore, both the left buffer 32 and the right buffer 34 are compression springs.

[0030] Specifically, when the left gripper 22 and the right gripper 23 approach the left stop 31 and the right stop 33 respectively, they will compress the compression spring. The compression spring will then apply a spring force to the left gripper 22 and the right gripper 23 in the opposite direction of movement, thereby reducing the speed of the left gripper 22 and the right gripper 23. This will reduce the speed of the left gripper 22 and the right gripper 23 relative to the left stop 31 and the right stop 33 respectively, thus preventing collisions that could damage components when the clamping surface and the limiting surface overlap.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0032] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. A centering fixture for a rotor stress-relieving device, the rotor stress-relieving device comprising a power element, characterized in that, The centering fixture includes: Mounting bracket (1), which forms a mounting surface, the normal direction of which is horizontal; A clamping assembly (2) is disposed on the mounting surface, the clamping assembly (2) forming opposing clamping surfaces for clamping the radially outer side of the rotor, the rotor's axial direction being vertical; and The limiting component (3) provided on the mounting surface forms a limiting surface with opposite normal directions both being horizontal. The limiting surface can respectively restrict the clamping surfaces from approaching each other, and the middle surface of the limiting surface coincides with the axis of the power element.

2. The centering fixture according to claim 1, characterized in that: The clamping assembly (2) includes: The guide rail (25) is provided on the mounting surface, and the length direction of the guide rail (25) is horizontal. The left jaw (22) and right jaw (23) are respectively connected to the guide rail (25), and the opposing surfaces of the left jaw (22) and the right jaw are the clamping surfaces; and A movable cylinder (21) connected to the left gripper (22) and the right gripper (23) is capable of driving the left gripper (22) and the right gripper (23) to move along the length direction of the guide rail (25).

3. The centering fixture according to claim 2, characterized in that: The limiting component (3) includes: A left stop (31) and a left buffer (32) are provided on the mounting surface. One end face of the left stop (31) is opposite to the left gripper (22), and the left stop (31) can restrict the movement of the left gripper (22) toward the right gripper (23); and A right stop (33) and a right buffer (34) are provided on the mounting surface. One end face of the right stop (33) is opposite to the right gripper (23). The right stop (33) can restrict the right gripper (23) from moving toward the left gripper (22).

4. The centering fixture according to claim 3, characterized in that: Both the left stop (31) and the right stop (33) can adjust their positions relative to the mounting surface, thereby adjusting the position of the middle surface of the limiting surface relative to the axis of the power element.

5. The centering fixture according to claim 4, characterized in that: The opposing surfaces of the left gripper (22) and the right gripper (23) are each formed with a gripper groove (24), the axis of which can coincide with the middle surface of the limiting surface.

6. The centering fixture according to claim 5, characterized in that: Both the left buffer (32) and the right buffer (34) are compression springs.

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