Damping ring structure of synchronous motor

Abstract

The utility model relates to the technical field of synchronous motors, in particular to a damping ring structure of a synchronous motor, which is mounted on a rotor core of the synchronous motor and comprises a damping ring body and a plurality of connecting rods, and the damping ring body is coaxially mounted at one end of the rotor core and is connected with the rotor core through a plurality of connecting columns. A plurality of mounting grooves are formed in the periphery of the damping ring body, one end of each connecting rod is clamped in the corresponding mounting groove, the ends, located in the mounting grooves, of the connecting rods are fixed to the bottoms of the mounting grooves through screws and are welded and fixed, and the other ends of the connecting rods are clamped in clamping grooves in the outer wall of a rotor iron core. The damping ring structure of the synchronous motor is convenient to install and fix, full welding is facilitated, and the welding quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of synchronous motors, and particularly relates to a damping ring structure of a synchronous motor. Background Art

[0002] The damping ring in a large synchronous motor is a mechanical component, which is installed on the rotor of the synchronous motor. By means of friction, the vibration of the rotor is eliminated, so that the rotor remains stable during high-speed rotation. Therefore, the damping ring in a large synchronous motor is very easy to wear and needs to be replaced regularly.

[0003] At present, the damping rings of large synchronous motors are usually installed at both ends of the rotor core, and then the damping rings at both ends are connected by connecting rods, so that the whole set of damping rings can be stably installed on the rotor core. The connecting rod and the damping ring are usually fixed by welding. The connecting rod and the damping ring are generally made of copper alloy materials, and the texture is soft. During the actual welding and fixing process, it is easy to be heated and warped, resulting in incomplete welding on the side of the damping ring close to the rotor core. During the normal use of the synchronous motor in the later stage, the whole damping ring is easy to cause unstable welds due to vibration, and the joint between it and the connecting rod is easy to break, resulting in accidents. The traditional processing method is to relatively fix the outer surfaces of the connecting rod and the damping ring by using a specific fixing fixture during welding, and then perform full welding. However, the use of the fixing fixture is easily affected by damping rings of different sizes and specifications, resulting in the need for special fixing fixtures for damping rings of different specifications and sizes in the later stage. Moreover, during the process of relatively fixing the damping ring and the connecting rod, continuous adjustment is required, resulting in an increase in maintenance costs. At the same time, the fixing fixture is easy to produce indentations and flash on the surfaces of both during the process of clamping the damping ring and the connecting rod. Therefore, it is necessary to polish the clamping area of the fixing fixture after the maintenance is completed, which is very troublesome. Therefore, it is necessary to design a damping ring structure that is conducive to full welding and ensures welding quality to solve the above problems. Summary of the Utility Model

[0004] In order to overcome one of the deficiencies of the prior art, the purpose of the utility model is to provide a damping ring structure of a synchronous motor. The damping ring structure of the synchronous motor is convenient for installation and fixation, conducive to full welding, and ensures welding quality.

[0005] To solve the above problems, the technical solutions adopted by the utility model are as follows:

[0006] A damping ring structure for a synchronous motor, which is installed on the rotor core of the synchronous motor, includes a damping ring body and a number of connecting rods. The damping ring body is coaxially installed at one end of the rotor core and is connected by a number of connecting columns. A number of installation grooves are provided on the outer periphery of the damping ring body. One end of each connecting rod is clamped in the corresponding installation groove. The end of the connecting rod located in the installation groove is fixed to the bottom of the installation groove by a screw and is welded and fixed. The other end of the connecting rod is clamped in the clamping groove on the outer wall of the rotor core.

[0007] Further, the connecting rod includes a connecting head and a rod body. The connecting head is arranged at one end of the rod body. The connecting head is installed on the bottom of the installation groove. A screw hole matching with the screw is provided on the connecting head. The height of the connecting head is lower than the depth of the installation groove. The rod body is clamped in the clamping groove on the outer wall of the rotor core.

[0008] Further, a shoulder is formed at the connection between the connecting head and the rod body. The shoulder abuts against the end face of the rotor core.

[0009] Further, the end of the connecting head does not protrude from the end face of the installation groove.

[0010] Further, the edges of the end of the connecting head are chamfered.

[0011] Further, the edges of the installation groove are chamfered.

[0012] Further, there are two damping ring bodies. The two damping ring bodies are respectively coaxially installed on the two end faces of the rotor core. The two ends of the connecting rod are respectively connected to the installation grooves on the two damping ring bodies.

[0013] Further, a number of installation holes are provided on the damping ring body.

[0014] Further, an insulating layer is coated on the area of the connecting rod located in the clamping groove.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] In the damping ring structure of a synchronous motor of the present utility model, installation grooves are provided on the outer periphery of the damping ring body, and then the end of the connecting rod is fixed to the bottom of the installation groove by a screw. This is beneficial to relatively fixing the end of the connecting rod and the damping ring, facilitating the staff to perform welding and fixing. At the same time, the design of the screw can also relatively fix the two, avoiding the problem that the full welding cannot be achieved during the welding process due to the heat-induced bending of the end of the connecting rod. At the same time, the installation groove is designed to accommodate the end of the connecting rod, increasing the contact area between the two, which is beneficial to the stability of the subsequent welding.

[0017] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the installation structure of an embodiment of the present utility model;

[0019] Figure 2 is a schematic diagram of a partial structure of an embodiment of the present utility model;

[0020] Figure 3 is Figure 1 a partial enlarged view of part A in

[0021] Description of the reference numerals in the drawings:

[0022] Rotor core 10, card slot 11, damping ring body 20, connecting column 21, mounting groove 22, screw 23, mounting hole 24, connecting rod 30, connecting head 31, rod body 32. Specific Embodiments

[0023] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] Referring to Figures 1 to 3 a synchronous motor damping ring structure shown in the figure, which is installed on the rotor core 10 of the synchronous motor, includes a damping ring body 20 and a plurality of connecting rods 30. The damping ring body 20 is coaxially installed at one end of the rotor core 10 and is connected by a plurality of connecting columns 21. A plurality of mounting grooves 22 are formed on the outer periphery of the damping ring body 20. One end of each connecting rod 30 is clamped in the corresponding mounting groove 22. One end of the connecting rod 30 located in the mounting groove 22 is fixed to the bottom of the mounting groove 22 by a screw 23 and is welded and fixed. The other end of the connecting rod 30 is clamped in the card slot 11 on the outer wall of the rotor core 10.

[0025] Wherein, in the present application, both the damping ring body 20 and the plurality of connecting rods 30 are made of copper alloy material, and the damping ring body 20 is obtained by welding a plurality of arc-shaped blocks. In addition, the connecting rod 30 in the present application is to increase the connection between the damping ring body 20 and the rotor core 10, so that the vibration of the rotor core 10 can be transmitted to the damping ring body 20.

[0026] In this synchronous motor damper ring structure, an installation groove 22 is formed on the outer periphery of the damper ring body 20, and then the end of the connecting rod 30 is fixed to the bottom of the installation groove 22 by a screw 23. This is beneficial for relatively fixing the end of the connecting rod 30 and the damper ring, facilitating the welding fixation by the staff. At the same time, the design of the screw 23 can also relatively fix the two, avoiding the problem that full welding cannot be achieved during the welding process due to the thermal bending of the end of the connecting rod 30. Meanwhile, the installation groove 22 is designed to accommodate the end of the connecting rod 30, increasing the contact area between the two, which is beneficial for the stability of subsequent welding.

[0027] See Figures 1 to 2 , in an embodiment of the present application, since the depths and widths of the card slot 11 and the installation groove 22 are different, to match this design, the connecting rod 30 includes a connecting head 31 and a rod body 32. The connecting head 31 is arranged at one end of the rod body 32. The connecting head 31 is installed on the bottom of the installation groove 22. A screw hole matching the screw 23 is formed on the connecting head 31. The height of the connecting head 31 is lower than the depth of the installation groove 22. The rod body 32 is clamped in the card slot 11 on the outer wall of the rotor core 10. It should be noted that the height of the connecting head 31 is lower than the depth of the installation groove 22. Such a design enables the staff to have sufficient solder filling space during the welding process of the two, and also makes the outer periphery of the entire damper ring body 20 flatter.

[0028] Furthermore, in an embodiment of the present application, a shoulder is formed at the connection between the connecting head 31 and the rod body 32, and the shoulder abuts against the end face of the rotor core 10. Such a design can make the rod body 32 stuck at the end of the card slot 11, avoiding the rod body 32 from moving longitudinally along with the vibration of the damper ring body 20. Further, in an embodiment of the present application, an insulating layer is coated on the area of the connecting rod 30 located in the card slot 11. Such a design can reduce the vibration of the rotor core 10 when transmitted to the connecting rod 30, and due to the gap between the two, the outer wall of the connecting rod 30 continuously rubs against the inside of the card slot 11, generating new vibrations. At the same time, it also avoids the wear of the two, resulting in the appearance of burrs on the outer wall of the connecting rod 30, and thus generating risks during the rotation of the synchronous motor.

[0029] Furthermore, to ensure the welding quality, the end of the connecting head 31 does not protrude from the end face of the installation groove 22, which is beneficial for the stacking of welding materials and also beneficial for ensuring the flatness of the outer periphery of the damper ring body 20. In addition, in some embodiments, the edges of the end of the connecting head 31 are chamfered. Similarly, the edges of the installation groove 22 are chamfered. Such an operation can, to a certain extent, facilitate welding and penetration, ensuring the welding quality. The chamfering of the edges of the above-mentioned connecting head 31 and the installation groove 22 are all bevel chamfers, which are beneficial for welding.

[0030] Further, in order to improve the stability and the connection firmness of the rotor core 10, in an embodiment of the present application, two damping ring bodies 20 are provided, and the two damping ring bodies 20 are coaxially installed on the end faces at both ends of the rotor core 10 respectively, and both ends of the connecting rod 30 are respectively connected to the mounting grooves 22 on the two damping ring bodies 20. Among them, such a design uses the connecting rod 30 and the two damping ring bodies 20 to enclose the entire rotor core 10 therein, making the entire structure more stable and avoiding uneven vibration transmitted by the rotor core 10 in the later stage. At the same time, the two damping ring bodies 20 can eliminate the vibration of the corresponding end of the rotor core 10 at both ends respectively.

[0031] Further, in an embodiment, in order to facilitate the installation of the remaining damping rings and other accessory structures, a plurality of mounting holes 24 are provided on the damping ring body 20.

[0032] The above embodiments are only the preferred embodiments of the present invention, and the scope of protection of the present invention cannot be limited thereby. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A damping ring structure for a synchronous motor, which is installed on the rotor core of the synchronous motor, is characterized in that, It includes a damping ring body and several connecting rods. The damping ring body is coaxially installed at one end of the rotor core and is connected by several connecting columns. A plurality of installation grooves are provided on the outer periphery of the damping ring body. One end of each connecting rod is clamped in the corresponding installation groove. The end of the connecting rod located in the installation groove is fixed to the bottom of the installation groove by a screw and is welded. The other end of the connecting rod is clamped in a card slot on the outer wall of the rotor core.

2. The damper ring structure of a synchronous motor according to claim 1, characterized in that: The connecting rod includes a connecting head and a rod body. The connecting head is arranged at one end of the rod body. The connecting head is installed on the bottom of the installation groove. A screw hole matched with the screw is provided on the connecting head. The height of the connecting head is lower than the depth of the installation groove. The rod body is clamped in a card slot on the outer wall of the rotor core.

3. The damper ring structure of a synchronous motor according to claim 2, characterized in that: A shoulder is formed at the connection between the connecting head and the rod body, and the shoulder abuts against the end face of the rotor core.

4. A damper ring structure of a synchronous motor according to claim 2, characterized in that: The end of the connecting head does not protrude from the end face of the installation groove.

5. A damper ring structure of a synchronous motor according to claim 2, characterized in that: The edges of the end of the connecting head are all chamfered.

6. A damper ring structure of a synchronous motor according to claim 1, characterized in that: The edges of the installation groove are all chamfered.

7. A damper ring structure of a synchronous motor according to any one of claims 1-6, characterized in that: There are two damping ring bodies. The two damping ring bodies are respectively coaxially installed on the end faces at both ends of the rotor core. Both ends of the connecting rod are respectively connected to the installation grooves on the two damping ring bodies.

8. A damper ring structure of a synchronous motor according to any one of claims 1-6, characterized in that: A plurality of installation holes are provided on the damping ring body.

9. A damper ring structure of a synchronous motor according to any one of claims 1-6, characterized in that: An insulating layer is coated on the area of the connecting rod located in the card slot.

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