End cover type A-type bearing bush motor

Abstract

The utility model relates to an end cover type A-type bearing bush motor. The end cover type A-type bearing bush motor comprises a motor end cover, a motor shaft protruding out of the motor end cover, and a bearing seat fixed on the motor end cover. The bearing seat comprises a bearing bush installed in the bearing seat, the bearing bush is arranged on the motor shaft in a sleeved mode, and a floating sealing ring is arranged between the bearing seat and the motor shaft. The end cover type A-type bearing bush motor further comprises an air sealing piece which is located on the inner side of the motor end cover and arranged on the motor shaft in a sleeving mode, the air sealing piece comprises an air sealing cover fixed to the motor end cover and an air sealing ring located between the air sealing cover and the motor shaft, and an air pressure balancing cavity is formed among the air sealing piece, the motor shaft and the bearing seat. An oil-gas mixture in the bearing bush is prevented from entering the motor, and the problem of negative pressure oil leakage of an end cover type A-type bearing bush motor is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an end cover type A-type bearing bush motor. Background Art

[0002] End cover type A bearing motors usually require lubricating oil to lubricate the bearings, and fans are used to cool the internal components. In the internal air path of the end cover type A bearing motor, the fan generates airflow under the action of rotation, resulting in a negative pressure area at the bearing, and the oil and gas in the bearing will be sucked out, causing the bearing to leak oil. The bearing generally blocks part of the oil and gas through the floating seal ring, but under the action of negative pressure, a small amount of oil and gas in the bearing will still enter the motor and cause oil leakage.

[0003] Therefore, it is necessary to develop a new end cover type A-type bearing motor to solve the above problems. Utility Model Content

[0004] The utility model aims to provide an end cover type A-type bearing bush motor which can solve the problem of bearing bush oil leakage.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an end cover type A-type bearing motor, which includes a motor end cover, a motor shaft protruding from the motor end cover and a bearing seat fixed to the motor end cover, the bearing seat includes a bearing installed inside thereof, the bearing is sleeved on the motor shaft, and a floating sealing ring is arranged between the bearing seat and the motor shaft; wherein, the end cover type A-type bearing motor also includes an air seal located on the inner side of the motor end cover and sleeved on the motor shaft, the air seal includes an air seal cover fixed to the motor end cover and an air seal ring located between the air seal cover and the motor shaft, and a balanced air pressure cavity is formed between the air seal, the motor shaft and the bearing seat.

[0006] As a further improved technical solution of the utility model, the air sealing cover comprises a hoop portion and a brim portion extending from the hoop portion, and the included angle between the hoop portion and the brim portion is greater than 90 degrees.

[0007] As a further improved technical solution of the present invention, the angle between the hoop portion and the brim portion is 107.5 degrees.

[0008] As a further improved technical solution of the utility model, the hoop portion is in a circular tube shape, the hoop portion includes a concave inner wall, and the air-tight sealing ring is installed on the inner wall.

[0009] As a further improved technical solution of the utility model, the inner wall includes limiting parts located on both sides and a multi-step portion recessed from the limiting parts.

[0010] As a further improved technical solution of the utility model, the step portion has at least three levels and includes at least two different inner diameters.

[0011] As a further improved technical solution of the utility model, the brim portion includes a fixed edge and a fixing hole and a positioning notch located on the fixed edge.

[0012] As a further improved technical solution of the utility model, the fixing holes are evenly distributed on the fixing edge along the circumference and are arranged through the fixing edge, and the positioning notches are semicircular and symmetrically distributed.

[0013] As a further improved technical solution of the utility model, the air sealing cover also includes an assembly part arranged on the brim part, and the air sealing cover includes an upper cover and a lower cover, and the upper cover and the lower cover are assembled into the air sealing cover through the assembly part using pins and screws.

[0014] As a further improved technical solution of the utility model, a chamfer is provided at the connection between the hoop portion and the brim portion.

[0015] Compared with the prior art, the beneficial effect of the utility model is that a balanced air pressure cavity is formed between the air seal, the motor shaft and the bearing seat, which isolates the oil-gas mixture in the bearing from entering the interior of the motor, thereby solving the negative pressure oil leakage problem of the end cover type A bearing motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0017] Figure 1 It is a partial schematic diagram of the end cover type A-type bearing bush motor of the utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the gas seal of the end cover type A-type bearing motor shown;

[0019] Figure 3 for Figure 2 Schematic diagram from another angle;

[0020] Figure 4 for Figure 2 Schematic cross section. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0022] Please refer to Figures 1 to 4 The utility model discloses an end cover type A-type bearing motor 100, which includes a motor end cover 1, a motor shaft 2 protruding from the motor end cover 1, and a bearing seat 3 fixed to the motor end cover 1. The bearing seat 3 includes a bearing 31 installed inside thereof, the bearing 31 is sleeved on the motor shaft 2, and a floating sealing ring 32 is arranged between the bearing seat 3 and the motor shaft 2. The end cover type A-type bearing motor 100 also includes an air seal located on the inner side of the motor end cover 1 and sleeved on the motor shaft 2. The air seal includes an air seal cover 4 fixed to the motor end cover 1 and an air seal ring 5 located between the air seal cover 4 and the motor shaft 2. A balanced air pressure cavity S is formed between the air seal, the motor shaft 2 and the bearing seat 3, which isolates the oil-gas mixture in the bearing 31 from entering the interior of the motor, thereby solving the negative pressure oil leakage problem of the end cover type A-type bearing motor 100.

[0023] For further information, please refer to Figures 1 to 4 , the air-sealing cover 4 includes a hoop portion 41 and a brim portion 42 extending from the hoop portion 41, and the angle between the hoop portion 41 and the brim portion 42 is greater than 90 degrees. In a preferred embodiment, the angle between the hoop portion 41 and the brim portion 42 is 107.5 degrees. The structure is stable and the sealing effect is excellent. The hoop portion 41 is in the shape of a circular tube, and the hoop portion 41 includes a concave inner wall, and the air-sealing ring 42 is installed on the inner wall. The hoop portion 41 is clamped on the motor shaft 2, and the air-sealing ring 42 is limited to the inner wall and seals the motor shaft 2. The inner wall includes a limiting portion 411 located on both sides and a multi-step step portion 412 concave from the limiting portion 411. In a preferred embodiment, the step portion 411 has three levels, including two different inner diameters, and the inner diameter of the step located in the middle is larger than the inner diameter located on both sides. The hoop portion 41 is clamped on the motor shaft 2, and the air-sealing ring 42 is limited to the inner wall and seals the motor shaft 2, which has a higher sealing effect.

[0024] Furthermore, the brim portion 42 includes a fixed edge 421 and a fixing hole 422 and a positioning notch 423 located on the fixed edge 421. The fixing holes 422 are evenly distributed on the fixed edge 422 along the circumference and are arranged through the fixed edge 422, and the positioning notches 423 are semicircular and symmetrically distributed. The gas seal cover 4 is fixed to the motor end cover 1 through the fixing holes 422. The positioning notch 423 has positioning and fixing functions. The gas seal cover 4 also includes an assembly portion 43 arranged on the brim portion 42, and the gas seal cover 4 includes an upper cover 44 and a lower cover 45. The upper cover 44 and the lower cover 45 are assembled into the gas seal cover 4 through the assembly portion 43 using pins 431 and screws 432. After the gas seal cover 4 is processed in half by the upper cover 44 and the lower cover 45, all turning processes require one-time clamping and processing to ensure the quality of the gas seal cover and improve production efficiency. In addition, a chamfer 461 is provided at the connection between the hoop portion 41 and the brim portion 42, and chamfers 461 are further provided at the edges and corners, so that the processing technology is better.

[0025] The utility model discloses an end cover type A-type bearing motor 100, in which gas seals 4 are respectively installed at both ends of the motor shaft 2 and the inner side of the bearing seat 3, and the gas seals 4 further seal the motor shaft 2 and are fixed to the motor end cover 1, so that a balanced air pressure cavity S is respectively formed between the gas seal 4, the bearing 31, and the motor shaft 2. The balanced air pressure cavity S is arranged in the negative pressure area of ​​the motor air path, which can effectively prevent the oil and gas in the bearing 31 from entering the inside of the motor, and completely solves the negative pressure oil leakage problem of the end cover type A-type bearing motor 100, and obtains a high-quality motor.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An end cover type A-type bearing motor, characterized in that: It includes a motor end cover, a motor shaft protruding from the motor end cover and a bearing seat fixed to the motor end cover, the bearing seat includes a bearing shell installed inside it, the bearing shell is sleeved on the motor shaft, and a floating sealing ring is arranged between the bearing seat and the motor shaft; wherein the end cover type A-type bearing shell motor also includes an air seal located on the inner side of the motor end cover and sleeved on the motor shaft, the air seal includes an air seal cover fixed to the motor end cover and an air seal ring located between the air seal cover and the motor shaft, and a balanced air pressure cavity is formed between the air seal, the motor shaft and the bearing seat.

2. The end cover type A-type bearing motor according to claim 1, characterized in that: The air sealing cover comprises a hoop portion and a brim portion extending from the hoop portion, and the included angle between the hoop portion and the brim portion is greater than 90 degrees.

3. The end cover type A-type bearing motor according to claim 2, characterized in that: The included angle between the hoop portion and the brim portion is 107.5 degrees.

4. The end cover type A-type bearing motor according to claim 2, characterized in that: The hoop portion is in a circular tube shape and comprises a concave inner wall, and the air-tight sealing ring is installed on the inner wall.

5. The end cover type A-type bearing motor according to claim 4, characterized in that: The inner wall includes limiting parts located on both sides and a multi-step portion recessed from the limiting parts.

6. The end cover type A-type bearing motor according to claim 5, characterized in that: The step portion has at least three steps and includes at least two different inner diameters.

7. The end cover type A-type bearing motor according to claim 2, characterized in that: The brim portion includes a fixing edge and a fixing hole and a positioning notch located on the fixing edge.

8. The end cover type A-type bearing motor according to claim 7, characterized in that: The fixing holes are evenly distributed on the fixing edge along the circumference and are arranged through the fixing edge, and the positioning notches are semicircular and symmetrically distributed.

9. The end cover type A-type bearing motor according to claim 2, characterized in that: The gas sealing cover further includes an assembling portion arranged on the brim portion, and the gas sealing cover includes an upper cover and a lower cover, and the upper cover and the lower cover are assembled into the gas sealing cover through the assembling portion using pins and screws.

10. The end cover type A-type bearing motor according to claim 2, characterized in that: A chamfer is provided at a connection between the hoop portion and the brim portion.

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