Rotor for a synchronous reluctance machine for a compressor

Abstract

The utility model discloses a rotor of synchronous reluctance motor for compressor, including the rotor iron core that is formed by the lamination of several punching sheet, end plate and connecting assembly, and the punching sheet is circular sheet structure, and the center of the punching sheet is provided with the shaft hole of connecting shaft, and the magnetic barrier is provided around the shaft hole, and the magnetic barrier includes the first magnetic barrier of the circular arc shape from outside to inside in radial, the second magnetic barrier, the third magnetic barrier and the fourth magnetic barrier, and the end plate is provided at both ends of the rotor iron core, and the end plate and the rotor iron core are fixed through the connecting assembly, the utility model discloses the rotor iron core and the end plate are fixed through the connecting assembly, and the connecting assembly adopts the double nut structure fixed of connecting rod cooperation both ends setting, and it is convenient to assemble and gasket installation, and the weight of gasket is ingeniously used to adjust rotor dynamic balance, avoids setting the additional counterweight hole on the short board, influences the end plate strength, and increases processing steps. The magnetic bridge is arranged in the magnetic barrier, enhances the punching sheet structure, and guarantees the rotor performance simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of motors, and in particular to a rotor of a synchronous reluctance motor for a compressor. Background Technology

[0002] Traditional compressor motors are primarily cast aluminum induction motors. However, with national energy conservation and emission reduction policies, and the development of motor and electronic technology in recent years, permanent magnet synchronous motors are also being used as drive components for compressors. Traditional cast aluminum induction motors have a simple structure and are easy to manufacture and operate, but their efficiency is low. Permanent magnet motors, on the other hand, use rare-earth excitation, resulting in high efficiency. However, permanent magnets are prone to demagnetization under high temperatures and high current impacts, leading to poor reliability and a complex manufacturing process. Utility Model Content

[0003] To address the shortcomings of the existing technology, the main objective of this utility model is to overcome these deficiencies and disclose a rotor for a synchronous reluctance motor used in a compressor. The rotor includes a rotor core formed by stacking several laminations, end plates, and connecting assemblies. The laminations are circular sheet-like structures, with a shaft hole at the center of each lamination for connecting to a rotating shaft. Magnetic barriers are arranged around the shaft hole, including a first, second, third, and fourth magnetic barrier that are radially arc-shaped from the outside in. The end plates are located at both ends of the rotor core, and the connecting assemblies fix the end plates and the rotor core together.

[0004] The connecting assembly includes a connecting rod, a nut, and a washer. The connecting rod passes through the end plate and the rotor core. The washer and the nut are located at both ends of the connecting rod, and two nuts are provided at each end for fastening. The washer is used to adjust the dynamic balance of the rotor.

[0005] Furthermore, the washer is disposed between the two nuts.

[0006] Furthermore, the nut and the connecting rod are secured together with thread-locking adhesive.

[0007] Furthermore, a magnetic bridge is provided between the third magnetic barrier and the fourth magnetic barrier.

[0008] Furthermore, the width of the magnetic bridge is 1 mm.

[0009] Furthermore, the outer side of the rotor core is coated with insulating varnish.

[0010] Furthermore, the end plate is provided with at least four connection holes, and the connection holes correspond to the third magnetic barrier, and the connection holes are on the same circumference.

[0011] Furthermore, the connection hole is provided with 8 holes.

[0012] Furthermore, a positioning groove is provided within the third magnetic barrier.

[0013] Furthermore, the end plate is made of stainless steel.

[0014] The beneficial effects achieved by this utility model are as follows:

[0015] This invention fixes the rotor core and end plates using a connecting assembly. The connecting assembly employs a connecting rod with a double-nut structure at both ends for easy assembly and shim installation. The weight of the shims is cleverly used to adjust the rotor's dynamic balance, avoiding the need for additional counterweight holes on the short plates, which would affect the end plate's strength and increase processing steps. Magnetic bridges are incorporated into the magnetic barriers to enhance the lamination structure while ensuring rotor performance. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the rotor of a synchronous reluctance motor for a compressor according to the present invention.

[0017] Figure 2 This is a cross-sectional view of the rotor of a synchronous reluctance motor for a compressor according to the present invention.

[0018] Figure 3 This is a schematic diagram of the lamination structure;

[0019] Figure 4 This is a schematic diagram of the end plate structure;

[0020] Figure 5 This is a schematic diagram of the gasket structure;

[0021] The attached figures are labeled as follows:

[0022] 1. Rotor core; 2. End plate; 3. Connecting assembly; 4. Magnetic barrier; 11. Lamination; 12. Shaft hole; 21. Connecting hole; 31. Connecting rod; 32. Nut; 33. Washer; 41. First magnetic barrier; 42. Second magnetic barrier; 43. Third magnetic barrier; 44. Fourth magnetic barrier; 45. Magnetic bridge; 431. Positioning groove. Detailed Implementation

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

[0024] The rotor of a synchronous reluctance motor used in a compressor, such as Figures 1-5As shown, the rotor core 1, end plates 2, and connecting components 3 are formed by stacking several laminations 11. The laminations 11 are circular sheet structures, and the center of each lamination 11 is provided with a shaft hole 12 for connecting to the rotating shaft. The rotor's driving force is transmitted through the shaft by connecting to the rotating shaft through the shaft hole. Magnetic barriers 4 are arranged around the shaft hole 12. Four sets of magnetic barriers 4 are arranged, including a first magnetic barrier 41, a second magnetic barrier 42, a third magnetic barrier 43, and a fourth magnetic barrier 44 that are radially arc-shaped from the outside to the inside. The end plates 2 are located at both ends of the rotor core 1, and the end plates 2 and the rotor core 1 are fixed by the connecting components 3.

[0025] The connecting assembly 3 includes a connecting rod 31, a nut 32, and a washer 33. The connecting rod 31 passes through the end plate 2 and the rotor core 1. The washer 33 and the nut 32 are located at both ends of the connecting rod 31, and two nuts 32 are provided at each end for fastening. In addition, the washer 33 serves as a counterweight to adjust the dynamic balance of the rotor. The double-nut fastening structure facilitates the assembly and fastening of the rotor. Preferably, the connecting rod 31 is made of stainless steel.

[0026] In one embodiment, such as Figures 1-5 As shown, the washer 33 is positioned between two nuts 32. During assembly, one nut 32 is first used to assemble and fix the end plate 2 and the rotor core 1, then the washer 33 is installed, and finally the other nut 32 is installed to fix the washer 33. Because the washer needs to be adjusted repeatedly, the double-nut structure facilitates the fixing and replacement of the washer 33. The washer 33 is made of the same silicon steel sheet as the lamination 11, and washer 33 of different thicknesses can be used to adjust the weight, ultimately achieving dynamic balance of the rotor.

[0027] In one embodiment, such as Figures 1-5 As shown, nut 32 is fixed to connecting rod 31 with thread-locking adhesive. Specifically, after end plate 2 and rotor core 1 are assembled together, a nut 32 is installed at both ends of connecting rod 31 to secure end plate 2 to rotor core 1; thread-locking adhesive is used to further fix nut 32 to connecting rod 31 to prevent nut 32 from loosening. After assembling washer 33, another nut 32 is installed. After washer 33 is pressed tight, the other nut 32 is tightened with thread-locking adhesive to further fix nut 32 and prevent nut 32 from loosening from connecting rod 31.

[0028] In one embodiment, such as Figures 1-5 As shown, a magnetic bridge 45 is disposed between the third magnetic barrier 43 and the fourth magnetic barrier 44. Preferably, the width of the magnetic bridge 45 is 1 mm. This is used to strengthen the lamination structure while ensuring rotor performance.

[0029] In one embodiment, such as Figures 1-5 As shown, the rotor core 1 is made by lamination and stacking to form a whole. After the stacking is completed, an insulating varnish is applied to the outside of the rotor core 1. After drying, the overall strength of the rotor core 1 is enhanced.

[0030] In one embodiment, such as Figures 1-5 As shown, at least four connecting holes 21 are provided on the end plate 2, and the connecting holes 21 correspond to the third magnetic barrier 43. The connecting holes 21 are on the same circumference. In this embodiment, eight connecting holes 21 are provided. After the connecting rod 31 passes through the connecting hole 21 of one end plate 2, it passes through the third magnetic barrier 43 of the rotor core 1, and then passes through the connecting hole 21 of the other end plate 2, and is fastened by a nut 32.

[0031] In the above embodiments, such as Figures 1-5 As shown, a positioning groove 431 is provided inside the third magnetic barrier 43. The positioning groove 431 cooperates with the connecting rod 31 to prevent the connecting rod 21 from moving.

[0032] In one embodiment, such as Figures 1-5 As shown, end plate 2 is made of stainless steel. Preferably, its thickness is 3mm. Since stainless steel is non-magnetic, this can better reduce magnetic leakage, reduce losses, and improve efficiency.

[0033] In the above embodiment, the end plate 2 is made of 314 stainless steel.

[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of implementation of the present utility model. Any modifications or equivalent substitutions to the present utility model without departing from the spirit and scope thereof should be covered within the protection scope of the claims of the present utility model.

Claims

1. A rotor of a synchronous reluctance motor for a compressor, characterized by, The device includes a rotor core formed by stacking several laminations, end plates, and connecting assemblies. The laminations are circular sheet structures, with a shaft hole at the center of each lamination for connecting to a rotating shaft. Magnetic barriers are arranged around the shaft hole, including a first, second, third, and fourth magnetic barrier that are radially arc-shaped from the outside to the inside. The end plates are located at both ends of the rotor core, and the connecting assemblies fix the end plates and the rotor core together. The connecting assembly includes a connecting rod, a nut, and a washer. The connecting rod passes through the end plate and the rotor core. The washer and the nut are located at both ends of the connecting rod, and two nuts are provided at each end for fastening. The washer is used to adjust the dynamic balance of the rotor.

2. A rotor for a synchronous reluctance machine for a compressor according to claim 1, characterized in that, The washer is positioned between the two nuts.

3. A rotor for a synchronous reluctance motor for a compressor according to claim 1, characterized in that, The nut is fixed to the connecting rod with thread-locking adhesive.

4. A rotor for a synchronous reluctance machine for a compressor according to claim 1, characterized in that, A magnetic bridge is provided between the third magnetic barrier and the fourth magnetic barrier.

5. A rotor for a synchronous reluctance machine for a compressor according to claim 4, characterized in that, The width of the magnetic bridge is 1 mm.

6. A rotor for a synchronous reluctance machine for a compressor according to claim 1, characterized in that, The outer side of the rotor core is coated with insulating varnish.

7. The rotor of a synchronous reluctance motor for a compressor according to claim 1, characterized in that, The end plate is provided with at least four connection holes, and the connection holes correspond to the third magnetic barrier, and the connection holes are on the same circumference.

8. A rotor for a synchronous reluctance machine for a compressor according to claim 7, characterized in that, There are 8 connection holes.

9. A rotor for a synchronous reluctance motor for a compressor according to claim 1, characterized in that, A positioning slot is provided inside the third magnetic barrier.

10. A rotor for a synchronous reluctance machine for a compressor according to claim 1, characterized in that, The end plate is made of stainless steel.

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