CN204633533U - Permanent magnet synchronous motor starting mechanism - Google Patents

Abstract

Permagnetic synchronous motor actuating mechanism, comprises impeller, rotor, and impeller has an installation cavity, and have an actuating sleeve in installation cavity, rotor is connected with actuating sleeve, thus rotor can drive actuating sleeve to rotate; Bolster is had between actuating sleeve and the inwall of installation cavity, between bolster and actuating sleeve, radial direction is interfered mutually, between bolster and the madial wall of installation cavity, radial direction is interfered mutually, thus actuating sleeve rotates the rotation of drive bolster, and bolster again impeller rotates.Between bolster of the present utility model and actuating sleeve, radial direction is interfered mutually, and radial direction is interfered mutually between bolster and the madial wall of installation cavity, therefore actuating sleeve rotates and drives bolster to rotate, bolster again impeller rotates, thus reach the object of startup, the rotational angle of bolster is comparatively large, start success rate high, little to the infringement of motor, and structure is comparatively simple.

Description

Permanent magnet synchronous motor starting mechanism

technical field

The utility model relates to a starting mechanism of a permanent magnet synchronous motor.

Background technique

The existing permanent magnet synchronous motor starting mechanism generally drives the buffer fixed on the impeller through the rotor, and this type of structure is fixed on the impeller due to the buffer. The no-load range of the rotor at start-up is the difference between the sum of the angles occupied by the driver, the buffer, and the impeller limiting boss and the angle of a circle. As we all know, the synchronous motor has the characteristics of small starting torque, the smaller the no-load range during the starting process, the worse the starting reliability.

Aiming at the above-mentioned deficiencies in the prior art, the Chinese utility model patent No. ZL201420009740.7 provides a permanent magnet synchronous motor starting device in a double-start mode, which is provided with several socketed cam mechanisms, which can increase the speed to a certain extent. There is no load range during a large start-up, but it also increases the complexity of the structure.

Contents of the invention

In order to overcome the above-mentioned shortcomings of the existing permanent magnet synchronous motor starting mechanism, the utility model provides a permanent magnet synchronous motor starting mechanism with a high starting success rate and a simpler structure.

The technical solution of the utility model to solve the technical problem is: the starting mechanism of the permanent magnet synchronous motor, including the impeller and the rotor, the impeller has an installation cavity, and there is a driving sleeve in the installation cavity, the rotor and the rotor The drive sleeve is connected, so that the rotor can drive the drive sleeve to rotate;

There is a buffer between the drive sleeve and the inner wall of the installation cavity, the buffer interferes with the drive sleeve in the radial direction, and the buffer and the inner wall of the installation cavity The radial directions between them interfere with each other, so that the rotation of the driving sleeve drives the rotation of the buffer member, and the buffer member then drives the rotation of the impeller.

Further, the installation cavity is cylindrical, and the inner wall of the installation cavity is provided with a first boss and a second boss; the buffer is located between the first boss and the second boss , the drive sleeve is located on the inner side of the first boss and the second boss, the outer surface of the drive sleeve is provided with a drive boss, and one side of the buffer can be connected to the first boss Or the second boss abuts, and the other side of the buffer member can abut against the driving boss.

Or: the installation cavity is cylindrical, and a driven boss is arranged on the inner wall of the installation cavity; the buffer member is located in the gap between the two sides of the driven boss, and the The drive sleeve of the drive sleeve is located inside the driven boss, and the drive sleeve is provided with a drive boss on the outer surface, and one side of the buffer member can abut against two sides of the driven boss, and the buffer member’s The other side can be against the driving boss.

The utility model also has the following additional technical features:

The cushioning piece is a flexible piece.

The rotor is inserted from the tail of the drive sleeve and rigidly connected with the drive sleeve as a whole.

A sealing protruding ring is provided at the tail of the driving sleeve.

The tail of the impeller is provided with a sealing device.

When the utility model is in use, the rotation of the rotor drives the drive sleeve to rotate. Due to the mutual interference in the radial direction between the buffer member and the drive sleeve, and the mutual interference in the radial direction between the buffer member and the inner wall of the installation cavity, the drive sleeve rotates Drive the buffer to rotate, and the buffer to drive the impeller to rotate, so as to achieve the purpose of starting.

The beneficial effect of the utility model lies in that the radial direction interferes with each other between the buffer member and the drive sleeve, and the radial direction interferes with each other between the buffer member and the inner wall of the installation cavity, so the rotation of the drive sleeve drives the buffer member to rotate, and the buffer member then Drive the impeller to rotate, so as to achieve the purpose of starting. The rotation angle of the buffer member is relatively large, the success rate of starting is high, the damage to the motor is small, and the structure is relatively simple.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is an exploded view of the utility model.

Fig. 3 is a cross-sectional view of the utility model.

Figure 4 is a schematic structural view of the impeller.

Fig. 5 is another cross-sectional view of the utility model.

Detailed ways

The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment.

Referring to Fig. 1 ~ Fig. 4, permanent magnet synchronous motor starting mechanism comprises impeller 1, rotor 2, and described impeller 1 has a mounting chamber 3, and a driving sleeve 4 is arranged in described mounting chamber 3, and described rotor 2 and The drive sleeve 4 is connected, so that the rotor 2 can drive the drive sleeve 4 to rotate. In this embodiment, the rotor 2 is inserted from the tail of the driving sleeve 4 and rigidly connected with the driving sleeve 4 as a whole.

There is a buffer member 5 between the drive sleeve 4 and the inner wall of the installation cavity 3, and the buffer member 5 interferes with the drive sleeve 4 in the radial direction, and the buffer member 5 and the The inner side walls of the installation cavity 3 interfere with each other in the radial direction, so that the driving sleeve 4 rotates to drive the buffer member 5 to rotate, and the buffer member 5 drives the impeller 1 to rotate. When in use, the rotation of the rotor 2 drives the drive sleeve 4 to rotate, because the buffer member 5 and the drive sleeve 4 interfere with each other in the radial direction, and the buffer member 5 and the inner wall of the installation cavity 3 interfere with each other in the radial direction, so The rotation of the drive sleeve 4 drives the buffer member 5 to rotate, and the buffer member 5 drives the impeller 1 to rotate, thereby achieving the purpose of starting.

In this embodiment, the radial interference between the buffer member 5 and the drive sleeve 4, and between the buffer member 5 and the inner side wall of the installation cavity 3 is implemented as follows: the installation cavity 3 is cylindrical, and the installation cavity 3 A first boss 6 and a second boss 7 are arranged on the inner wall, and the inner surfaces of the first boss 6 and the second boss 7 are arc-shaped; the buffer member 5 is located on the first boss 6 Between the second boss 7, the drive sleeve 4 is located inside the first boss 6 and the second boss 7, and the drive sleeve 4 is provided with a drive boss 8 on the outer surface. The outer surface of 8 is an arc that fits with the inner surfaces of the first boss 6 and the second boss 7, so that the outer surface of the driving boss 8 can be aligned with the inner surfaces of the first boss 6 and the second boss 7. Fitting; one side of the buffer member 5 can abut against the first boss 6 or the second boss 7, and the other side of the buffer member 5 can abut against the driving boss 8, so The inner surface of the buffer member 5 is adapted to the body of the drive sleeve, and the outer surface of the buffer member 5 is adapted to the inner wall of the installation cavity 3 . When in use, the rotation of the rotor 2 drives the drive sleeve 4 to rotate, and when the drive sleeve 4 rotates to a certain angle, the drive boss 8 is offset against the buffer member 5, thereby driving the buffer member 5 to rotate. After the buffer member 5 rotates to a certain angle, it meets the first The boss 6 or the second boss 7 offset each other, so that the buffer member 5 drives the impeller 1 to rotate, so as to achieve the purpose of starting. With the above settings, the rotor 2 drives the drive sleeve 4 to rotate at an angle and then contacts the buffer member 5. When the drive sleeve 4 drives the buffer member 5 to move, there is no load burden, but only drives the buffer member 5 to move, which is equivalent to no load, until the buffer member 5 offsets against the first boss 6 or the second boss 7, so the synchronous motor has a large no-load angle when starting, which is more conducive to buffering at the beginning of starting and improving the success rate of starting, and at the same time has a greater protective effect on the starting of the motor.

Of course, as shown in Figure 5, instead of two bosses, only one boss is provided, that is, only one driven boss 10 is arranged on the inner wall of the installation cavity, and the buffer member 5 is located at the slave boss 10. In the neutral position between the two sides of the moving boss 10, the driving sleeve 4 is located on the inner side of the driven boss 10, the driving sleeve 4 is provided with a driving boss 8 on the outer surface, and the buffer member 5 One side of the buffer member 5 can abut against two sides of the driven boss 10 , and the other side of the buffer member 5 can abut against the driving boss 8 . Similarly, the rotor 2 drives the drive sleeve 4 to idle for an angle and then contacts the buffer member 5. When the drive sleeve 4 drives the buffer member 5 to move, there is no load burden, but only drives the buffer member 5 to move, which is equivalent to no load, until the buffer member 5 Abutting against one side of the driven boss 10, the buffer member 5 then drives the impeller 1 to rotate.

In this embodiment, the buffer member 5 is a flexible member, such as a rubber member, which can further enhance the buffering effect. The tail of the driving sleeve 4 is provided with a sealing convex ring 9, and the tail of the impeller 1 is provided with a sealing device, which can realize sealing and prevent water and dust from entering.

Claims (7)

1. Permanent magnet synchronous motor starting mechanism, comprising impeller, rotor, it is characterized in that: described impeller has a mounting cavity, and a driving sleeve is arranged in the described mounting cavity, and described rotor is connected with described driving sleeve, thereby The rotor can drive the drive sleeve to rotate; There is a buffer between the drive sleeve and the inner wall of the installation cavity, the buffer interferes with the drive sleeve in the radial direction, and the buffer and the inner wall of the installation cavity The radial directions between them interfere with each other, so that the rotation of the driving sleeve drives the rotation of the buffer member, and the buffer member then drives the rotation of the impeller. 2. The permanent magnet synchronous motor starting mechanism according to claim 1, wherein the installation cavity is cylindrical, and the inner side wall of the installation cavity is provided with a first boss and a second boss; The buffer member is located between the first boss and the second boss, the driving sleeve is located inside the first boss and the second boss, and the outer surface of the driving sleeve is provided with As for the driving boss, one side of the buffer member can abut against the first boss or the second boss, and the other side of the buffer member can abut against the driving boss. 3. The permanent magnet synchronous motor starting mechanism according to claim 1, wherein the installation cavity is cylindrical, and a driven boss is provided on the inner wall of the installation cavity; The buffer member is located in the neutral between the two sides of the driven boss, the driving sleeve is located inside the driven boss, and the outer surface of the driving sleeve is provided with a driving boss. One side of the buffer member can abut against two side surfaces of the driven boss, and the other side of the buffer member can abut against the driving boss. 4. The permanent magnet synchronous motor starting mechanism according to any one of claims 1 to 3, characterized in that: the buffer member is a flexible member. 5. The permanent magnet synchronous motor starting mechanism according to any one of claims 1 to 3, wherein the rotor is inserted from the tail of the drive sleeve and is rigidly connected with the drive sleeve as a whole. 6. The permanent magnet synchronous motor starting mechanism according to any one of claims 1 to 3, characterized in that: a sealing protruding ring is provided at the tail of the drive sleeve. 7. The permanent magnet synchronous motor starting mechanism according to any one of claims 1 to 3, characterized in that: the tail of the impeller is provided with a sealing device.