Single-support permanent magnet synchronous motor structure for compressor

Abstract

The invention discloses a single-support permanent magnet synchronous motor structure for a compressor, which belongs to the technical field of compressor and motor connection and comprises a motor stator, a motor rotor, a locking piece, an internal thread cylindrical pin, a sliding bearing, a shaft sleeve and a locking assembly. A projecting shaft of the motor rotor is rotationally connected with the motor rear cover; a rotor bearing seat is pressed and fixed at the other end of the motor rotor; sliding bearings are pressed and fixed in a plurality of groups of mounting holes formed in the rotor bearing seat respectively; one ends of the multiple sets of internal thread cylindrical pins are fixedly connected to the shaft sleeve, and the other ends of the multiple sets of internal thread cylindrical pins are inserted into inner holes of the sliding bearings in a matched mode; the shaft sleeve is assembled on the extending shaft of the compressor and is locked and fixed through the locking assembly. The internal thread cylindrical pin, the sliding bearing, the rotor bearing seat and the motor rear cover bearing are matched to fix the motor rotor, so that the connecting structure of the compressor and the motor is more compact, disassembly and assembly are more convenient, and meanwhile, the motor chamber sweeping risk is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of connection between compressors and motors, and in particular to a single-support permanent magnet synchronous motor structure for a compressor. Background Art

[0002] Currently, there are two main ways to connect compressors and motors. One is a split structure, where an independent motor is connected to the compressor through a coupling; the other is an integrated compressor structure, where the motor rotor is directly connected to the extended shaft of the compressor, and there is no bearing inside the motor.

[0003] Of the two existing structures, the split structure has high costs, and the motor and compressor take up a large space; the integrated compressor structure has no bearing support for the motor rotor, which is directly connected to the compressor extension shaft. There are reasons such as the motor rotor being too long and the compressor extension shaft being too short, which can cause serious eccentricity between the motor stator and rotor, affecting the performance of the motor and compressor, and even causing the motor to scrape the bore.

[0004] Based on this, the present invention designs a single-support permanent magnet synchronous motor structure for a compressor to solve the above problems. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a single-support permanent magnet synchronous motor structure for a compressor.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A single-support permanent magnet synchronous motor structure for a compressor, comprising a motor base, a motor stator, a motor rotor, a motor rear cover, a locking piece, an internally threaded cylindrical pin, a sliding bearing, a rotor bearing seat, a shaft sleeve and a locking assembly;

[0008] The motor stator is press-fitted and fixed in the motor base, one end of the motor base is fixedly connected to the motor rear cover, and the extended shaft of the motor rotor is rotatably connected to the motor rear cover; the other end of the motor rotor is press-fitted and fixed with a rotor bearing seat, and sliding bearings are respectively press-fitted and fixed in multiple groups of mounting holes opened on the rotor bearing seat; one end of multiple groups of internal threaded cylindrical pins are fixedly connected to the shaft sleeve, and the other ends of the multiple groups of internal threaded cylindrical pins are respectively matched and plugged with the inner holes of each sliding bearing; the middle part of the shaft sleeve is processed with an inner hole that matches and plugs with the extended shaft of the compressor; the shaft sleeve is assembled on the extended shaft of the compressor and is locked and fixed by a locking assembly.

[0009] Furthermore, a motor rear cover bearing is installed between the extended shaft of the motor rotor and the motor rear cover, and the inner and outer rings of the motor rear cover bearing are respectively fixedly connected to one end of the extended shaft of the motor rotor and the motor rear cover.

[0010] Furthermore, the shaft sleeve is processed with a plurality of groups of pin holes for the locking screws to pass through, and one end of the internal thread cylindrical pin is fixedly connected to the shaft sleeve by the locking screw.

[0011] Furthermore, the locking assembly includes a rotor pressure plate and a rotor pressure plate screw, and the shaft sleeve is locked and fixed to the compressor extension shaft through the rotor pressure plate and the rotor pressure plate screw.

[0012] Furthermore, the plurality of sets of sliding bearings are distributed at equal intervals along the circle.

[0013] Furthermore, the rotor pressure plate is located inside the rotor bearing seat, and the rotor pressure plate is pressed onto the shaft sleeve.

[0014] Furthermore, the rotor pressure plate screw passes through the pressure plate and is threadedly fixedly connected to the compressor extension shaft.

[0015] Furthermore, the diameter of the inner hole in the middle of the sleeve is the same as the diameter of the extended shaft of the compressor.

[0016] In order to better achieve the purpose of the present invention, the present invention also provides

[0017] Compared with the prior art, the present invention has the following beneficial effects: the present invention fixes the motor rotor by matching the internal threaded cylindrical pin, the sliding bearing, the rotor bearing seat and the motor rear cover bearing, so that the connection structure between the compressor and the motor is more compact; the structure in which the sliding bearing and the internal threaded cylindrical pin match each other acts as a group of bearings, but does not require lubricating oil, and is more convenient to disassemble and install than directly using bearings; at the same time, compared with the motor for an integrated compressor without bearings, the risk of motor bore sweeping is also eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A three-dimensional diagram of a single-support permanent magnet synchronous motor structure for a compressor of the present invention;

[0020] Figure 2 A cross-sectional view of a single-support permanent magnet synchronous motor structure for a compressor of the present invention;

[0021] Figure 3 This is an exploded view of the structure of a single-support permanent magnet synchronous motor for a compressor of the present invention.

[0022] The numbers in the figure represent:

[0023] 1. Motor base; 2. Motor stator; 3. Motor rotor; 31. Extended shaft; 4. Motor rear cover; 5. Motor rear cover bearing; 6. Locking screw; 7. Internal threaded cylindrical pin; 8. Sliding bearing; 9. Rotor bearing seat; 10. Compressor extended shaft; 11. Bushing; 12. Rotor pressure plate; 13. Rotor pressure plate screw; 14. Water outlet pipe; 15. Water inlet pipe; 16. First water storage chamber; 17. Second water storage chamber; 18. Connecting hole. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The terms “left”, “right”, “front”, “back”, “up” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0026] Embodiment 1: In some embodiments, please refer to the drawings of the specification Figure 1-Figure 3 , a single-support permanent magnet synchronous motor structure for a compressor, comprising a motor base 1, a motor stator 2, a motor rotor 3, a motor rear cover 4, a locking member, an internal threaded cylindrical pin 7, a sliding bearing 8, a rotor bearing seat 9, a shaft sleeve 11 and a locking assembly;

[0027] The motor stator 2 is press-fitted and fixed in the motor base 1, one end of the motor base 1 is fixedly connected to the motor rear cover 4, and the extended shaft 31 of the motor rotor 3 is rotatably connected to the motor rear cover 4; the other end of the motor rotor 3 is press-fitted and fixed with a rotor bearing seat 9, and the multiple groups of mounting holes opened on the rotor bearing seat 9 are respectively press-fitted and fixed with sliding bearings 8; one end of multiple groups of internal threaded cylindrical pins 7 are all fixedly connected to the shaft sleeve 11, and the other ends of multiple groups of internal threaded cylindrical pins 7 are respectively matched and plugged with the inner holes of each sliding bearing 8; the middle part of the shaft sleeve 11 is processed with an inner hole that matches and plugs with the extended shaft 10 of the compressor; the shaft sleeve 11 is assembled on the extended shaft 10 of the compressor and is locked and fixed by a locking assembly;

[0028] Preferably, a motor rear cover bearing 5 is installed between the extended shaft 31 of the motor rotor 3 and the motor rear cover 4, and the inner and outer rings of the motor rear cover bearing 5 are fixedly connected to one end of the extended shaft 31 of the motor rotor 3 and the motor rear cover 4 respectively.

[0029] Preferably, the shaft sleeve 11 is processed with multiple groups of pin holes for the locking screws 6 to pass through, and one end of the internal thread cylindrical pin 7 is fixedly connected to the shaft sleeve 11 by the locking screw 6;

[0030] The present invention fixes the motor rotor 3 by matching the internal threaded cylindrical pin 7, the sliding bearing 8, the rotor bearing seat 9 and the motor rear cover bearing 5, so that the connection structure between the compressor and the motor is more compact. The matching structure of the sliding bearing 8 and the internal threaded cylindrical pin 7 plays the role of a group of bearings, but does not require lubricating oil. Compared with directly using bearings, disassembly and installation are more convenient; at the same time, compared with the motor for an integrated compressor without bearings, the risk of motor bore sweeping is also eliminated.

[0031] Embodiment 2: In some embodiments, as a preferred embodiment of the present invention, preferably, the locking assembly includes a rotor pressure plate 12 and a rotor pressure plate screw 13, and the sleeve 11 is locked and fixed to the compressor extension shaft 10 through the rotor pressure plate 12 and the rotor pressure plate screw 13; this structure is suitable for motors of various cooling types, such as air cooling, oil cooling, water cooling, etc.

[0032] Embodiment 3: In some embodiments, as a preferred embodiment of the present invention, preferably, multiple sets of sliding bearings 8 are distributed at equal intervals along a circle;

[0033] Preferably, the rotor pressure plate 12 is located inside the rotor bearing seat 9, and the rotor pressure plate 12 is pressed onto the shaft sleeve 11;

[0034] Preferably, the rotor pressure plate screw 13 passes through the pressure plate 12 and is threadedly fixedly connected to the compressor extension shaft 10;

[0035] Preferably, the diameter of the inner hole in the middle of the sleeve 11 is the same as the diameter of the compressor extension shaft 10 .

[0036] Embodiment 4: In some embodiments, as a preferred embodiment of the present invention, a cooling component is also installed on the motor base 1;

[0037] The cooling assembly includes a water outlet pipe 14, a water inlet pipe 15, a first water storage chamber 16, a second water storage chamber 17 and a connecting hole 18; the first water storage chamber 16 and the second water storage chamber 17 are respectively fixedly mounted on the outer wall of the motor base 1, and the first water storage chamber 16 and the second water storage chamber 17 are separated from each other at the upper ends and connected at the lower ends through the connecting hole 18, and the upper ends of the first water storage chamber 16 and the second water storage chamber 17 are respectively fixedly connected with the water outlet pipe 14 and the water inlet pipe 15;

[0038] Water enters the second water storage chamber 17 through the water inlet pipe 15, then enters the first water storage chamber 16 through the connecting hole 18, and then flows out through the water outlet pipe 14, thereby cooling the motor frame 1 and ensuring the cooling effect on the motor.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A single-support permanent magnet synchronous motor structure for a compressor, comprising a motor base (1), a motor stator (2), a motor rotor (3), and a motor rear cover (4), characterized in that: It also includes a locking piece, an internally threaded cylindrical pin (7), a sliding bearing (8), a rotor bearing seat (9), a shaft sleeve (11) and a locking assembly; The motor stator (2) is press-fitted and fixed in the motor base (1); one end of the motor base (1) is fixedly connected to the motor rear cover (4); the extension shaft (31) of the motor rotor (3) is rotatably connected to the motor rear cover (4); a rotor bearing seat (9) is press-fitted and fixed to the other end of the motor rotor (3); sliding bearings (8) are press-fitted and fixed in multiple groups of mounting holes opened on the rotor bearing seat (9); one end of multiple groups of internal thread cylindrical pins (7) are fixedly connected to the shaft sleeve (11); the other ends of the multiple groups of internal thread cylindrical pins (7) are respectively matched and plugged into the inner holes of each sliding bearing (8); the middle part of the shaft sleeve (11) is processed with an inner hole matched and plugged into the extension shaft (10) of the compressor; the shaft sleeve (11) is assembled on the extension shaft (10) of the compressor and is locked and fixed by a locking component.

2. The single-support permanent magnet synchronous motor structure for a compressor according to claim 1, characterized in that: A motor rear cover bearing (5) is arranged between the protruding shaft (31) of the motor rotor (3) and the motor rear cover (4), and the inner and outer rings of the motor rear cover bearing (5) are respectively fixedly connected to one end of the protruding shaft (31) of the motor rotor (3) and the motor rear cover (4).

3. The single-support permanent magnet synchronous motor structure for a compressor according to claim 2, characterized in that: The shaft sleeve (11) is processed with a plurality of groups of pin holes for the locking screws (6) to pass through, and one end of the internal thread cylindrical pin (7) is fixedly connected to the shaft sleeve (11) by the locking screw (6).

4. The single-support permanent magnet synchronous motor structure for a compressor according to claim 3, characterized in that: The locking assembly comprises a rotor pressure plate (12) and a rotor pressure plate screw (13), and the shaft sleeve (11) is locked and fixed to the compressor extension shaft (10) through the rotor pressure plate (12) and the rotor pressure plate screw (13).

5. The single-support permanent magnet synchronous motor structure for a compressor according to claim 4, characterized in that: A plurality of sets of sliding bearings (8) are distributed at equal intervals along a circle.

6. The single-support permanent magnet synchronous motor structure for a compressor according to claim 5, characterized in that: The rotor pressure plate (12) is located inside the rotor bearing seat (9), and the rotor pressure plate (12) is pressed onto the shaft sleeve (11).

7. The single-support permanent magnet synchronous motor structure for a compressor according to claim 6, characterized in that: The rotor pressure plate screw (13) passes through the pressure plate (12) and is threadedly fixedly connected to the compressor extension shaft (10).

8. The single-support permanent magnet synchronous motor structure for a compressor according to claim 7, characterized in that: The diameter of the inner hole in the middle of the shaft sleeve (11) is the same as the diameter of the compressor extension shaft (10).

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