CN209913654U

CN209913654U - Outer rotor variable frequency compressor motor

Info

Publication number: CN209913654U
Application number: CN201920928681.6U
Authority: CN
Inventors: 彭旺兴; 何成志; 蒋静; 何四发; 刘运中; 陈永安; 谌强
Original assignee: Changhong Huayi Compressor Co Ltd
Current assignee: Changhong Huayi Compressor Co Ltd
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2020-01-07
Anticipated expiration: 2029-06-20

Abstract

The utility model relates to an outer rotor variable frequency compressor motor, including crankcase, bent axle, outer rotor, stator, be provided with keyway (7) on the crankcase (1) main shaft, the afterbody is provided with ring groove (8) radially, be provided with location lug (9) on the internal perisporium of stator (4), be provided with radial hole one (10) on the major axis of bent axle (2); a second radial hole (14) is formed in the shaft sleeve at the bottom of the steel sleeve (11) of the outer rotor (3); the stator (4) is sleeved on a main shaft of the crankcase (1), a positioning lug (9) of the stator is clamped in the strip-shaped key groove (7), and an elastic retainer ring (5) is arranged on the annular clamping groove (8); the outer rotor (3) is sleeved outside the crankshaft (2) and the stator (4), and conical elastic pins (6) are arranged on the radial hole II (14) and the radial hole I (10); this patent structural design is reasonable, convenient to use, reliability are high, the practicality is strong, consequently has wide market prospect.

Description

Outer rotor variable frequency compressor motor

Technical Field

The utility model relates to a compressor field, especially an external rotor variable frequency compressor motor.

Background

The motor of the present frequency conversion compressor adopts the structure in fig. 1, the rotor is connected with the crankshaft inside, and the stator is connected with the crankcase outside. The motor is a permanent magnet auxiliary synchronous reluctance motor: the rotor is composed of silicon steel and permanent magnets to form a basic structure, the stator is composed of silicon steel and enameled wires, a three-phase alternating current winding is arranged on the stator, and the torque of the motor is generated under the alternating current action of the permanent magnet rotor and the stator, so that the rotor and the crankshaft are driven to rotate to generate mechanical motion. When the variable frequency compressor is started, the variable frequency compressor runs at the highest rotating speed, so that the aim of quickly cooling is fulfilled; then the operation is carried out at low speed, thereby achieving the purposes of reducing energy consumption and saving energy. The aim of research and development of frequency conversion compressor manufacturers is to lower the lowest rotating speed of the frequency conversion compressor (reduce energy consumption), because the frequency conversion compressor has very low noise and very large vibration under the condition of very low rotating speed (960 rpm), so that the compressor is arranged on a refrigerator and vibrates greatly and produces resonance with a refrigerator pipeline, and the experience feeling of a user is very poor.

Disclosure of Invention

For solving the technical problem among the prior art, the utility model provides an external rotor variable frequency compressor motor rational in infrastructure, energy saving and consumption reduction, stable performance.

For solving the technical problem the utility model discloses a technical scheme does: the utility model provides an outer rotor variable frequency compressor motor, includes crankcase, bent axle, outer rotor, stator, its characterized in that: a long-strip-shaped key groove is formed in the axial direction of the surface of the main shaft of the crankcase, an annular clamping groove is formed in the tail part of the main shaft in the radial direction, a positioning lug is arranged on the inner peripheral wall of the stator, and a first radial hole is formed in the long shaft of the crankshaft; the outer rotor consists of a steel sleeve, a fixed sleeve and magnetic steel, the fixed sleeve is arranged in the steel sleeve, the magnetic steel is arranged in the fixed sleeve, and a shaft sleeve at the bottom of the steel sleeve is provided with a radial hole II; the stator is sleeved on a main shaft of the crankcase, a positioning lug of the stator is clamped in the strip-shaped key groove, and an elastic retainer ring is arranged on the annular clamping groove; the crankshaft is sleeved in the main shaft of the crankcase, the outer rotor is sleeved outside the crankshaft and the stator, and a conical elastic pin is arranged between a radial hole II in the shaft sleeve and a radial hole I in the long shaft of the crankshaft.

The length of the long strip-shaped key groove is 25mm, and the width of the long strip-shaped key groove is 2.1 mm.

The width of ring-shaped clamping groove is 1.1 mm.

The middle part of the conical elastic pin is a hollow cylinder, and the two ends of the conical elastic pin are hollow cones.

The diameter of the cylinder is 3mm, and the cone angle of the cone is 15 degrees.

The fixed cover is made of plastic, 9 vertical raised lines are arranged on the inner wall of the fixed cover, and two side faces of each raised line and the inner wall form 70-degree taper.

And circular bulges are arranged on the two side surfaces of the convex strips.

The height of the circular protrusion is 1-3 mm.

The utility model discloses an outer rotor variable frequency compressor motor, the external diameter of its outer rotor is a lot more than the external diameter of inner rotor, and the inertia of outer rotor is just very big like this, and the torque of the big motor of inertia also can be big, is favorable to improving the start-up and the overload capacity of motor. The rotary inertia can also reduce the noise, vibration, weight and power consumption of the whole frequency conversion compressor, especially the vibration under low speed can be obviously reduced, and meanwhile, the motor has smaller volume and more compact structure, so that the compressor has more compact structure and smaller volume, the refrigerator is convenient to install, the space is saved, and therefore the technical scheme has the advantages of reasonable design, convenience in use, high reliability, strong practicability and the like, and has wide market space.

Drawings

FIG. 1 is a schematic structural diagram of a motor of a frequency conversion compressor in the prior art;

FIG. 2 is a first schematic structural view of the crankcase of the present invention;

FIG. 3 is a schematic structural view II of the crankcase of the present invention;

fig. 4 is a schematic structural view of the stator of the present invention;

FIG. 5 is a schematic view of the structure of the present invention in which the crankshaft is engaged with the outer rotor;

fig. 6 is a schematic structural view of the outer rotor of the present invention;

FIG. 7 is a top view of FIG. 6;

fig. 8 is a schematic structural view of the conical elastic pin of the present invention;

fig. 9 is a side view of fig. 8.

Detailed Description

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

As shown in fig. 2-8, an outer rotor variable frequency compressor motor comprises a crankcase, a crankshaft, an outer rotor, and a stator, wherein an elongated key groove 7 with a length of 25mm and a width of 2.1mm is cast on the axial direction of the main shaft surface of the crankcase 1, an annular clamping groove 8 with a width of 1.1 mm is cast on the tail part in the radial direction, a positioning bump 9 is cast on the inner peripheral wall of the stator 4, and a radial hole one 10 is cast on the long shaft of the crankshaft 2; the outer rotor 3 is composed of a steel sleeve 11, a fixed sleeve 12 and magnetic steel 13, the fixed sleeve 12 is clamped in the steel sleeve 11, the magnetic steel 13 is sleeved in the fixed sleeve 12, and a second radial hole 14 is cast on a shaft sleeve at the bottom of the steel sleeve 11; the stator 4 is sleeved on a main shaft of the crankcase 1, a positioning lug 9 of the stator is clamped in a strip-shaped key groove 7, and an elastic retainer ring 5 is clamped on the annular clamping groove 8; the crankshaft 2 is sleeved in a main shaft of the crankcase 1, the outer rotor 3 is sleeved outside the crankshaft 2 and the stator 4, and a conical elastic pin 6 is clamped between a second radial hole 14 in a shaft sleeve and a first radial hole 10 in a long shaft of the crankshaft 2.

The middle part of the conical elastic pin 6 is a hollow cylinder, the two ends of the conical elastic pin are hollow cones, the diameter of each cylinder is 3mm, and the cone angle of each cone is 15 degrees.

The fixed sleeve 12 is made of plastic, 9 vertical raised lines are arranged on the inner wall of the fixed sleeve, and two side faces of each raised line and the inner wall form 70-degree taper.

And circular bulges with the height of 2mm are molded on the two side surfaces of the convex strips.

The use method of the outer rotor variable frequency compressor motor for the refrigerator compressor comprises the following steps:

the stator 4 and the crankcase 1 of the utility model are in key slot fit (limit axial force), and the stator 4 and the crankcase 1 are fixed (limit radial force) by the elastic retainer ring 5 for the shaft; the outer rotor 3 is in a cold rolled steel and permanent magnet structure, the outer rotor 3 and the crankshaft 2 are fixedly connected through the conical elastic pin 6, the outer rotor 3 is enabled to rotate through magnetic lines generated by the permanent magnet and a winding of the stator 4, the crankshaft 2 is driven to rotate, and the crankshaft 2 rotates to drive the piston and the connecting rod to move, so that mechanical energy is produced.

The above description is only the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and the technical solution and the inventive concept of the present invention should be covered by the protection scope of the present invention with equivalent replacement or change.

Claims

1. The utility model provides an outer rotor variable frequency compressor motor, includes crankcase, bent axle, outer rotor, stator, its characterized in that: a strip-shaped key groove (7) is formed in the axial direction of the surface of a main shaft of the crankcase (1), an annular clamping groove (8) is formed in the tail portion of the main shaft in the radial direction, a positioning bump (9) is arranged on the inner peripheral wall of the stator (4), and a first radial hole (10) is formed in the long shaft of the crankshaft (2); the outer rotor (3) is composed of a steel sleeve (11), a fixed sleeve (12) and magnetic steel (13), the fixed sleeve (12) is arranged in the steel sleeve (11), the magnetic steel (13) is arranged in the fixed sleeve (12), and a shaft sleeve at the bottom of the steel sleeve (11) is provided with a second radial hole (14); the stator (4) is sleeved on a main shaft of the crankcase (1), a positioning lug (9) of the stator is clamped in the strip-shaped key groove (7), and an elastic retainer ring (5) is arranged on the annular clamping groove (8); the crankshaft (2) is sleeved in a main shaft of the crankcase (1), the outer rotor (3) is sleeved outside the crankshaft (2) and the stator (4), and a conical elastic pin (6) is arranged between a radial hole II (14) in a shaft sleeve and a radial hole I (10) in a long shaft of the crankshaft (2).

2. The external rotor variable frequency compressor motor of claim 1, wherein: the length of the long strip-shaped key groove (7) is 25mm, and the width of the long strip-shaped key groove is 2.1 mm.

3. The external rotor variable frequency compressor motor of claim 1, wherein: the width of the annular clamping groove (8) is 1.1 mm.

4. The external rotor variable frequency compressor motor of claim 1, wherein: the middle part of the conical elastic pin (6) is a hollow cylinder, and the two ends of the conical elastic pin are hollow cones.

5. The external rotor variable frequency compressor motor of claim 4, wherein: the diameter of the cylinder is 3mm, and the cone angle of the cone is 15 degrees.

6. The external rotor variable frequency compressor motor of claim 1, wherein: the fixed sleeve (12) is made of plastic, 9 vertical raised lines are arranged on the inner wall of the fixed sleeve, and two side faces of each raised line and the inner wall form 70-degree taper.

7. The external rotor variable frequency compressor motor of claim 6, wherein: and circular bulges are arranged on the two side surfaces of the convex strips.

8. The external rotor variable frequency compressor motor of claim 7, wherein: the height of the circular protrusion is 1-3 mm.