Motor protection rotor and motor

Abstract

The utility model discloses a motor protection rotor which comprises a main shaft, a rotor winding is sleeved outside the main shaft, bearings are arranged at two ends of the rotor winding on the main shaft, and an anti-corrosion layer is coated outside the rotor winding. The utility model also provides a motor comprising the motor protection rotor. According to the utility model, the anti-corrosion layer is coated outside the winding, and the coating layer is thin, so that the performance of the motor can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a motor protective rotor and a motor. Background Art

[0002] Shielded motors are used to transport highly toxic, corrosive, radioactive, flammable, explosive, precious liquids, as well as liquids that can cause serious harm if leaked.

[0003] The rotor shielding sleeve is a key component of the shielded motor. At present, the rotor shielding sleeve is fixed on the rotor by welding. The patent number "201410520196.7" discloses a "mechanical tungsten arc welding method for the rotor shielding sleeve and the rotor guard ring of the main pump motor". However, there are several problems with the welding method; 1. The shielding sleeve needs a certain thickness to ensure strength and weldability, so the gap between the rotor and the stator is increased. The gap between the stator and the rotor of the motor increases, and the magnetic resistance increases, which increases the excitation loss. A larger excitation current is required to generate a sufficient magnetic field. The increase in excitation current leads to a decrease in motor power, which affects the motor efficiency and power utilization rate; 2. The air gap harmonic magnetic field increases, which leads to an increase in motor operation noise and vibration. 3. Welding deformation and welding process will cause damage to the dynamic balance of the rotor, requiring secondary processing and dynamic balance correction. Utility Model Content

[0004] The utility model aims to provide a motor protective rotor.

[0005] The invention also provides a motor comprising a motor protection rotor.

[0006] The innovation of the utility model is that the utility model is provided with an anti-corrosion layer coated on the outside of the winding, and the coating layer is relatively thin, so that the performance of the motor can be greatly improved.

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

[0008] A motor protective rotor comprises a main shaft, a rotor winding is arranged on the main shaft outer shell, bearings are arranged at both ends of the rotor winding on the main shaft, and an anti-corrosion layer is coated on the rotor winding.

[0009] Furthermore, the anti-corrosion layer is made of PFA or ceramic material.

[0010] Furthermore, anti-corrosion pads are provided between the bearing and the two ends of the rotor winding, which can position the rotor winding on the one hand and effectively reduce the volume of gas in the motor on the other hand.

[0011] Furthermore, a circle of notches is provided at both ends of the rotor winding, and a circle of protrusions engaging with the notches is provided on the anti-corrosion pad, so as to facilitate the positioning of the sealing pad.

[0012] Furthermore, sealing gaskets are provided between the anti-corrosion pad and the bearing, and between the anti-corrosion pad and the rotor winding.

[0013] Furthermore, one end of the main shaft is an extended end, and the other end is a sealed end, a locking nut is screwed on the sealed end, and a sealing gasket is arranged on the locking nut. The sealed end is anti-corrosive.

[0014] A motor with a motor protection rotor comprises a motor housing, wherein a first motor end cover and a second motor end cover are respectively arranged at two ends of the motor housing, a stator and a rotor are arranged in the motor housing, a cylindrical shielding sleeve body is arranged inside the stator, the first motor end cover and the second motor end cover are both provided with a clamping structure for clamping and positioning with the shielding sleeve body, and a pressure cover is arranged outside the first motor end cover. The motor stator shielding sleeve is positioned and clamped between the two motor end covers through the positioning clamping structure, which reduces the difficulty of welding, and the motor stator housing does not need to use the same corrosion-resistant material as the shielding sleeve, so the cost is low and the processing difficulty is small.

[0015] Furthermore, the engaging structure is a step, and sealing rings are provided between the shielding sleeve body and the first motor end cover and the second motor end cover; the shielding sleeve body is made of corrosion-resistant material.

[0016] Furthermore, the shielding sleeve body is provided with a circle of external bosses on the outer wall at one end of the No. 1 motor end cover; the external boss is located at one end of the shielding sleeve body close to the center, and the connecting surface with the shielding sleeve body is a conical surface; the external boss is provided with a No. 1 shielding sleeve flange, and the No. 1 shielding sleeve flange is clamped at the external boss and connected with the No. 1 motor end cover by screws to limit the axial position of the shielding sleeve body.

[0017] Furthermore, the inner wall of the shielding sleeve body at the No. 2 motor end cover is provided with a circle of inner bosses; the outer wall of the shielding sleeve body at the No. 2 motor end cover is provided with a circle of inner recesses, the inner recesses are provided with two semicircular ring-shaped limiting rings, the semicircular ring-shaped limiting rings are provided with No. 2 shielding sleeve flanges, the No. 2 shielding sleeve flanges are clamped at the semicircular ring-shaped limiting rings and connected with the No. 2 motor end cover by screw locking to axially limit the shielding sleeve body. Both ends of the shielding sleeve are axially limited, and the shielding sleeve is not easily deformed;

[0018] When the shielding sleeve is damaged, you only need to disassemble the motor and replace the shielding sleeve; if you want to change the position of the medium cargo pump, just replace the appropriate shielding sleeve material; low cost and easy maintenance.

[0019] The beneficial effects of the utility model are:

[0020] 1. The utility model can greatly improve the performance of the motor by coating an anti-corrosion layer on the outside of the winding, and the coating layer is relatively thin.

[0021] 2. The anti-corrosion pads in the utility model can position the rotor windings on the one hand, and can effectively reduce the volume of gas in the motor on the other hand.

[0022] 3. 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.

[0023] 4. In the utility model, both ends of the shielding sleeve are axially limited, so the shielding sleeve is not easily deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of Example 1.

[0025] Figure 2 This is a schematic diagram of the structure of Example 2.

[0026] Figure 3 It is a schematic diagram of the structure of the shielding sleeve body.

[0027] Figure 4 This is a schematic diagram of the structure at the end cover of motor No. 1.

[0028] Figure 5 This is a schematic diagram of the structure at the end cover of motor No. 2. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present utility model will be described clearly and completely below in conjunction with the accompanying drawings.

[0030] Embodiment 1: A motor rotor protection comprises a main shaft 1, a rotor winding 2 is provided on the outer sleeve of the main shaft 1, bearings 3 are provided at both ends of the rotor winding on the main shaft 1, one end of the main shaft 1 is an extended end 1.1, and the other end is a sealed end 1.2, a locking nut 7 is screwed on the sealed end 1.2, and a sealing gasket 6 is provided at the locking nut 7. The rotor winding 2 is coated with an anti-corrosion layer 4, and the anti-corrosion layer 4 is made of PFA or ceramic. An anti-corrosion pad 5 is provided between the bearing 3 and both ends of the rotor winding 2, a circle of notches 2.1 is provided at both ends of the rotor winding 2, and a circle of protrusions 5.1 engaged with the notches 2.1 are provided on the anti-corrosion pad 5. Sealing gaskets 6 are provided between the anti-corrosion pad 5 and the bearing 3, and between the anti-corrosion pad 5 and the rotor winding 2.

[0031] Embodiment 2: A motor with a motor protection rotor comprises a motor housing 8, wherein a No. 1 motor end cover 9 and a No. 2 motor end cover 10 are respectively arranged at both ends of the motor housing 8, a stator 11 and a rotor 12 are arranged in the motor housing 8, a cylindrical shielding sleeve body 13 is arranged on the inner side of the stator 11, and a snap-fit ​​structure 14 for snapping and positioning with the shielding sleeve body 13 is arranged on the No. 1 motor end cover 9 and the No. 2 motor end cover 10, and a pressure cover 15 is arranged outside the No. 1 motor end cover 9; the snap-fit ​​structure 14 is a step, and sealing rings 16 are arranged between the shielding sleeve body 13 and one end of the motor end cover 9 and the No. 2 motor end cover 10; the shielding sleeve body 13 is made of corrosion-resistant material.

[0032] A circle of external bosses 17 are provided on the outer wall of the shielding sleeve body 13 at one end of the No. 1 motor end cover 9; the external boss 17 is located at one end of the shielding sleeve body 13 close to the center, and the connecting surface with the shielding sleeve body 13 is a conical surface; a No. 1 shielding sleeve flange 22 is sleeved on the external boss 17, and the No. 1 shielding sleeve flange 22 is clamped on the external boss 14 and connected to the No. 1 motor end cover 9 by screws to limit the axial position of the shielding sleeve body 13.

[0033] The inner wall of the shielding sleeve body 13 located at the No. 2 motor end cover 10 is provided with a circle of inner bosses 18; the outer wall of the shielding sleeve body 13 located at the No. 2 motor end cover 10 is provided with a circle of inner recesses 19, and two semicircular ring-shaped limiting rings 20 are clamped at the inner recesses 19, and a No. 2 shielding sleeve flange 21 is provided at the semicircular ring-shaped limiting rings 20. The No. 2 shielding sleeve flange 21 is clamped at the semicircular ring-shaped limiting rings 20 and is connected to the No. 2 motor end cover 10 by screw locking to limit the axial position of the shielding sleeve body 13.

[0034] 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 protection rotor, comprising a main shaft, a rotor winding is disposed on the main shaft outer sleeve, and bearings are disposed at both ends of the rotor winding on the main shaft, characterized in that: The rotor winding is coated with an anti-corrosion layer.

2. The motor rotor protection device according to claim 1, characterized in that: The anti-corrosion layer is made of PFA or ceramic material.

3. The motor rotor protection device according to claim 1, characterized in that: Anti-corrosion pads are provided between the bearing and two ends of the rotor winding.

4. The motor rotor protection device according to claim 3, characterized in that: A circle of notches is arranged at two ends of the rotor winding, and a circle of protrusions engaged with the notches is arranged on the anti-corrosion pad.

5. The motor rotor protection device according to claim 4, characterized in that: Sealing gaskets are arranged between the anti-corrosion pad and the bearing, and between the anti-corrosion pad and the rotor winding.

6. The motor rotor protection device according to claim 1, characterized in that: One end of the main shaft is an extended end, and the other end is a sealed end. A locking nut is screwed on the sealed end, and a sealing gasket is arranged on the locking nut.

7. A motor comprising the motor protection rotor according to any one of claims 1 to 6, characterized in that: It includes a motor housing, wherein a No. 1 motor end cover and a No. 2 motor end cover are respectively provided at both ends of the motor housing, a stator and a rotor are provided in the motor housing, a cylindrical shielding sleeve body is provided on the inner side of the stator, the No. 1 motor end cover and the No. 2 motor end cover are both provided with a snap-fit ​​structure for snapping and positioning with the shielding sleeve body, and a pressure cover is provided outside the No. 1 motor end cover.

8. The motor with motor protection rotor according to claim 7, characterized in that: The engaging structure is a step, and sealing rings are arranged between the shielding sleeve body and the first motor end cover and the second motor end cover; the shielding sleeve body is made of corrosion-resistant material.

9. The motor with motor protection rotor according to claim 7, characterized in that: The shielding sleeve body is provided with a circle of external bosses on the outer wall at one end of the No. 1 motor end cover; the external bosses are located at one end of the shielding sleeve body close to the center and the connecting surface with the shielding sleeve body is a conical surface; the external bosses are provided with No. 1 shielding sleeve flanges, and the No. 1 shielding sleeve flanges are clamped at the external bosses and connected to the No. 1 motor end cover by screws to limit the axial position of the shielding sleeve body.

10. The motor with motor protection rotor according to claim 7, characterized in that: The inner wall of the shielding sleeve body located at the end cover of the No. 2 motor is provided with a circle of inner bosses; the outer wall of the shielding sleeve body located at the end cover of the No. 2 motor is provided with a circle of inner recesses, and two semicircular ring-shaped limiting rings are clamped in the inner recesses, and a No. 2 shielding sleeve flange is provided at the semicircular ring-shaped limiting rings. The No. 2 shielding sleeve flange is clamped at the semicircular ring-shaped limiting rings and is connected to the No. 2 motor end cover by screw locking to limit the axial position of the shielding sleeve body.

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