Motor stator shielding sleeve assembling structure

Abstract

The utility model discloses a motor stator shielding sleeve assembling structure which comprises a cylindrical shielding sleeve body, two ends of the shielding sleeve body are respectively provided with a first motor end cover and a second motor end cover, and the motor stator shielding sleeve assembling structure is characterized in that the first motor end cover and the second motor end cover are respectively provided with a clamping structure which is clamped and positioned with the shielding sleeve body. According to the utility model, the motor stator shielding sleeve is positioned and clamped between the two motor end covers through the positioning and clamping structure, the welding difficulty is reduced, and the motor stator shell does not need to be made of a corrosion-resistant material which is the same as that of the shielding sleeve, so that the cost is low and the processing difficulty is small.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to an assembly structure of a motor stator shielding sleeve. Background Art

[0002] Currently, the motor shielding sleeve is generally connected to the motor by welding. The shielding sleeve is thin-walled and the welding end is relatively close to the insulating wire. High temperature will affect the insulation and the welding technology requirements are relatively high. In addition, the motor stator housing needs to use the same corrosion-resistant material as the shielding sleeve, which is costly and difficult to process.

[0003] When the motor stator or shielding sleeve is damaged, the weld needs to be cut open and replaced, and then re-welded. The processing is difficult and costly, and pressure testing is required. The shielding sleeve and motor stator shell materials are selected according to the medium material. Once the medium or the pump's position of use is changed, if the corrosion requirements are not met, the entire pump needs to be replaced.

[0004] Patent No. "CN104493341B" discloses a "method for welding a shielding sleeve of a shielded motor stator and a lower flange and the equipment used therein". It can be seen that welding the stator shielding sleeve is relatively troublesome. Utility Model Content

[0005] The utility model aims to provide an assembly structure of a motor stator shielding sleeve.

[0006] The innovation of the utility model is that the motor stator shielding sleeve in the utility model is positioned and clamped between the two motor end covers through a positioning and clamping structure, which reduces the difficulty of welding, and the motor stator shell does not need to use the same corrosion-resistant material as the shielding sleeve, which has low cost and low processing difficulty.

[0007] In order to achieve the above utility model purpose, the technical solution of the utility model is:

[0008] A motor stator shielding sleeve assembly structure comprises a cylindrical shielding sleeve body, wherein a first motor end cover and a second motor end cover are respectively arranged at two ends of the shielding sleeve body, and the first motor end cover and the second motor end cover are both provided with a snap-fit ​​structure for snapping and positioning with the shielding sleeve body.

[0009] Furthermore, sealing rings are provided between the shielding sleeve body and the first motor end cover and the second motor end cover to enhance the sealing effect.

[0010] Furthermore, the engaging structure is a step, which makes it easier to engage and position.

[0011] Furthermore, the shielding sleeve body is provided with a circle of outer bosses at the outer wall of one end of the No. 1 motor end cover, so as to increase the strength of the shielding sleeve body without increasing the overall wall thickness of the shielding sleeve body.

[0012] Furthermore, the connecting surface between the outer boss located at one end of the shielding sleeve body close to the center and the shielding sleeve body is a conical surface.

[0013] Furthermore, a shielding sleeve flange No. 1 is sleeved on the outer boss, and the shielding sleeve flange No. 1 is clamped on the outer boss and connected with the motor end cover No. 1 by screws to limit the axial position of the shielding sleeve body. The other end of the shielding sleeve body is axially limited, and the shielding sleeve body is pulled, so that the sealing performance is better and it is not easy to deform.

[0014] Furthermore, the engagement surfaces of the No. 1 shielding sleeve flange and the outer boss are also conical surfaces. The precision requirements for the matching of conical surfaces during manufacturing can be greatly reduced.

[0015] Furthermore, the inner wall of the shielding sleeve body located at the end cover of the second motor is provided with a circle of inner bosses, so as to enhance the strength of the shielding sleeve without affecting the installation.

[0016] Furthermore, the outer wall of the shielding sleeve body located at the No. 2 motor end cover is provided with a circle of concave, and two semicircular limiting rings are clamped in the concave, and a No. 2 shielding sleeve flange is provided at the semicircular limiting ring. The No. 2 shielding sleeve flange is clamped at the semicircular limiting ring and is connected to the No. 2 motor end cover by screw locking to limit the axial position of the shielding sleeve body.

[0017] Furthermore, the shielding sleeve body is made of corrosion-resistant material or a corrosion-resistant layer is provided on the shielding sleeve body.

[0018] The beneficial effects of the utility model are:

[0019] 1. The motor stator shielding sleeve in the utility model is positioned and clamped between the two motor end covers through a positioning and clamping structure, which reduces the difficulty of welding, and the motor stator shell does not need to use the same corrosion-resistant material as the shielding sleeve, which has low cost and low processing difficulty.

[0020] 2. In the utility model, the shielding sleeve is sealed with the upper and lower end covers of the motor to divide the internal space of the shielded motor into two spaces inside and outside the shielding sleeve. The space inside the shielding sleeve is greatly reduced. When the gas receives the medium pressure, the gas shrinks. Only a smaller gas cavity space is needed to ensure that the medium does not enter the interior of the motor.

[0021] 3. In the utility model, the wall of the shielding sleeve is thin at the place where it cooperates with the rotor, and one end is thickened inside and the other end is thickened outside at the places where it cooperates with the motor end cover. While ensuring that it can be installed, the strength of the shielding sleeve is guaranteed; and because the other parts of the shielding sleeve are relatively thin, the operating efficiency of the motor is met.

[0022] 4. In the utility model, both ends of the shielding sleeve are axially limited, so the shielding sleeve is not easily deformed.

[0023] 5. In the utility model, when the shielding sleeve is damaged, it is only necessary to disassemble the motor and replace the shielding sleeve; if the medium cargo pump is to be replaced, it is only necessary to replace the shielding sleeve with a suitable material; the cost is low and the maintenance is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the utility model.

[0025] Figure 2 This is a schematic diagram of the structure at the end cover of motor No. 1.

[0026] Figure 3 This is a schematic diagram of the structure at the end cover of motor No. 2. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present utility model will be described clearly and completely below in conjunction with the accompanying drawings.

[0028] Example 1: Figure 1 , 2 As shown in Figures 3 and 4, a motor stator shielding sleeve assembly structure includes a cylindrical shielding sleeve body 1, which is made of corrosion-resistant material or has a corrosion-resistant layer. The shielding sleeve body 1 is provided with a No. 1 motor end cover 2 and a No. 2 motor end cover 3 at both ends, respectively. The No. 1 motor end cover 2 and the No. 2 motor end cover 3 are provided with a clamping structure 4 for clamping and positioning with the shielding sleeve body 1, and the clamping structure 4 is a step. A sealing ring 5 is provided between the shielding sleeve body 1 and the motor end cover 2 at one end and the No. 2 motor end cover 3.

[0029] A circle of external bosses 6 is provided on the outer wall of the shielding sleeve body 1 at one end of the No. 1 motor end cover 2. The external bosses 6 are located at one end of the shielding sleeve body 1 close to the center, and the connecting surface with the shielding sleeve body 1 is a conical surface.

[0030] A No. 1 shielding sleeve flange 7 is sleeved on the outer boss 6. The No. 1 shielding sleeve flange 7 is clamped on the outer boss 6 and connected with the No. 1 motor end cover 2 by screws to limit the axial position of the shielding sleeve body 1. The clamping surface between the No. 1 shielding sleeve flange 7 and the outer boss 6 is also a conical surface.

[0031] The inner wall of the shielding sleeve body 1 at the No. 2 motor end cover 3 is provided with a circle of inner bosses 8. The outer wall of the shielding sleeve body 1 at the No. 2 motor end cover 3 is provided with a circle of inner recesses 9, two semicircular ring-shaped limiting rings 10 are clamped at the inner recesses 9, and a No. 2 shielding sleeve flange 11 is provided at the semicircular ring-shaped limiting rings 10. The No. 2 shielding sleeve flange 11 is clamped at the semicircular ring-shaped limiting rings 10 and connected with the No. 2 motor end cover 3 by screws to limit the axial position of the shielding sleeve body 1.

[0032] The described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Claims

1. A motor stator shielding sleeve assembly structure, comprising a cylindrical shielding sleeve body, wherein a first motor end cover and a second motor end cover are respectively disposed at both ends of the shielding sleeve body, and the characteristic is that both the first motor end cover and the second motor end cover are provided with a snap-fit ​​structure for snapping and positioning with the shielding sleeve body.

2. The motor stator shielding sleeve assembly structure according to claim 1, characterized in that: Sealing rings are arranged between the shielding sleeve body and the first motor end cover and the second motor end cover.

3. The motor stator shielding sleeve assembly structure according to claim 1, characterized in that: The engaging structure is a step.

4. The motor stator shielding sleeve assembly structure according to claim 1, characterized in that: The shielding sleeve body is provided with a circle of outer bosses on the outer wall of one end of the No. 1 motor end cover.

5. The motor stator shielding sleeve assembly structure according to claim 4, characterized in that: The connecting surface of the outer boss located at one end of the shielding sleeve body close to the center and the shielding sleeve body is a conical surface.

6. The motor stator shielding sleeve assembly structure according to claim 4, characterized in that: A No. 1 shielding sleeve flange is sleeved on the outer boss, and the No. 1 shielding sleeve flange is clamped on the outer boss and connected with the No. 1 motor end cover through screws to limit the axial position of the shielding sleeve body.

7. The motor stator shielding sleeve assembly structure according to claim 6, characterized in that: The engaging surfaces of the No. 1 shielding sleeve flange and the outer boss are also conical surfaces.

8. The motor stator shielding sleeve assembly structure according to any one of claims 1 to 7, characterized in that: The inner wall of the shielding sleeve body located at the end cover of the second motor is provided with a circle of inner bosses.

9. The motor stator shielding sleeve assembly structure according to claim 8, characterized in that: The outer wall of the shielding sleeve body located at the No. 2 motor end cover is provided with a circle of concave, and two semicircular limiting rings are clamped at the concave, and a No. 2 shielding sleeve flange is provided at the semicircular limiting ring. The No. 2 shielding sleeve flange is clamped at the semicircular limiting ring and is connected to the No. 2 motor end cover by screw locking to limit the axial position of the shielding sleeve body.

10. The motor stator shielding sleeve assembly structure according to claim 1, characterized in that: The shielding sleeve body is made of corrosion-resistant material or a corrosion-resistant layer is provided on the shielding sleeve body.

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