Motor sealing structure

Abstract

The utility model relates to the technical field of motor sealing, in particular to a motor sealing structure, which comprises a motor end cover, a motor shaft is inserted in the middle of the motor end cover, a bearing is arranged on the motor shaft, the bearing is fixedly connected with the motor end cover, a framework oil seal is arranged on the outer end face of the motor end cover, and the framework oil seal is sleeved on the motor shaft. And a labyrinth sealing ring covers the outer side of the framework oil seal and is fixed on the motor end cover. The labyrinth sealing ring is additionally arranged, the labyrinth sealing ring is pressed on the motor shaft in an interference fit mode and is integrated with the motor shaft, the labyrinth sealing ring is in clearance fit with the multiple concave labyrinth grooves in the surface of the motor end cover, abrasion is avoided during rotation, permanent sealing can be guaranteed, and friction temperature and mechanical abrasion are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motor sealing, in particular to a motor sealing structure. Background Art

[0002] To make the motor suitable for outdoor, high humidity and heat environment, motor flushing and other working conditions with relatively harsh environments, and at the same time ensure that the motor can operate continuously for a long time, the protection requirements for the motor are relatively high.

[0003] The protection of the existing motor shaft extension part often uses a skeleton oil seal. The skeleton oil seal is in interference fit in the bearing cover. When the motor starts to run, it can meet the IP66 requirement. After running for about 20,000 hours, the inner hole of the oil seal and the shaft rub against each other, the bearing temperature rises, and with the continuous addition of dust, the wear between the sealing ring and the shaft increases continuously, and the waterproof and dustproof effects will decline. After a long time, leakage will occur, accelerating the damage of the bearing. In a more serious situation, the winding will be burned out, and then the motor will be scrapped. Therefore, we propose a motor sealing structure to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the disadvantages in the prior art that the inner hole of the oil seal and the shaft rub against each other, the bearing temperature rises, with the continuous addition of dust, the wear between the sealing ring and the shaft increases continuously, the waterproof and dustproof effects will decline, and leakage will occur after a long time, accelerating the damage of the bearing, and to propose a motor sealing structure.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A motor sealing structure includes a motor end cover. A motor shaft is inserted in the middle of the motor end cover. A bearing is arranged on the motor shaft, and the bearing is fixedly connected with the motor end cover. A skeleton oil seal is arranged on the outer end surface of the motor end cover. The skeleton oil seal is sleeved on the motor shaft, and a labyrinth seal ring is covered on the outside of the skeleton oil seal. The labyrinth seal ring is fixed on the motor end cover.

[0007] The beneficial effect of the utility model is that multiple concave labyrinth grooves are formed on the outer surface of the motor end cover, and the labyrinth seal ring is clamped in the multiple concave labyrinth grooves. The cooperation of the multiple concave labyrinth grooves and the labyrinth seal ring improves the protection effect on the motor and reduces the entry of dust.

[0008] The beneficial effect of the utility model is that the labyrinth seal ring is sleeved on the motor shaft and is in interference fit with the motor shaft, reducing the entry of water vapor and dust.

[0009] The beneficial effects of the present utility model are that an installation groove is provided on the outer end surface of the motor end cover, and the skeleton oil seal is clamped in the installation groove, making the skeleton oil seal flush with the outer end surface of the motor end cover, which is convenient for the installation of the labyrinth seal ring.

[0010] The beneficial effects of the present utility model are as follows:

[0011] By adding a labyrinth seal ring to this device, the labyrinth seal ring is press-fitted onto the motor shaft with an interference fit and integrated with the motor shaft. The labyrinth seal ring has a clearance fit with multiple concave labyrinth grooves on the surface of the motor end cover, resulting in no wear during rotation and ensuring permanent sealing, reducing frictional temperature and mechanical wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 FIG. is a schematic structural diagram of a motor sealing structure proposed by the present utility model.

[0013] In the figure: 1, motor end cover; 2, motor shaft; 3, bearing; 4, skeleton oil seal; 5, labyrinth seal ring; 6, multiple concave labyrinth grooves. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0015] Referring to Figure 1 , a motor sealing structure includes a motor end cover 1. A motor shaft 2 is inserted in the middle of the motor end cover 1. A bearing 3 is arranged on the motor shaft 2, and the bearing 3 is fixedly connected to the motor end cover 1. A fixing groove adapted to the bearing 3 is provided on the motor end cover 1, and the bearing 3 is installed in the fixing groove.

[0016] Among them, a skeleton oil seal 4 is arranged on the outer end surface of the motor end cover 1. An installation groove is provided on the outer end surface of the motor end cover 1, and the skeleton oil seal 4 is clamped in the installation groove, making the skeleton oil seal 4 flush with the outer end surface of the motor end cover 1, which is convenient for the installation of the labyrinth seal ring 5. The skeleton oil seal 4 is sleeved on the motor shaft 2;

[0017] Secondly, a labyrinth seal ring 5 is covered outside the skeleton oil seal 4. The labyrinth seal ring 5 is fixed on the motor end cover 1. Multiple concave labyrinth grooves 6 are provided on the outer surface of the motor end cover 1. The labyrinth seal ring 5 is clamped in the multiple concave labyrinth grooves 6. The cooperation between the multiple concave labyrinth grooves 6 and the labyrinth seal ring 5 improves the protection effect on the motor and reduces the entry of dust. The labyrinth seal ring 5 is sleeved on the motor shaft 2 and has an interference fit with the motor shaft 2, reducing the entry of water vapor and dust.

[0018] In this embodiment: The labyrinth seal ring 5 is press-fitted onto the motor shaft 2 with an interference fit and integrated with the motor shaft 2. The labyrinth seal ring 5 is in clearance fit with the multiple concave labyrinth grooves 6 on the surface of the motor end cover 1, so there is no wear during rotation, and permanent sealing can be ensured, reducing frictional temperature and mechanical wear.

[0019] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A motor sealing structure, comprising a motor end cover (1), wherein a motor shaft (2) is inserted in the middle of the motor end cover (1), a bearing (3) is arranged on the motor shaft (2), and the bearing (3) is fixedly connected to the motor end cover (1), characterized in that: A skeleton oil seal (4) is arranged on the outer end surface of the motor end cover (1), the skeleton oil seal (4) is sleeved on the motor shaft (2), and the outer side of the skeleton oil seal (4) is covered with a labyrinth seal ring (5), and the labyrinth seal ring (5) is fixed on the motor end cover (1).

2. A motor sealing structure according to claim 1, characterized in that: The outer surface of the motor end cover (1) is provided with multiple concave labyrinth grooves (6), and the labyrinth sealing ring (5) is clamped in the multiple concave labyrinth grooves (6).

3. A motor sealing structure according to claim 2, characterized in that: The labyrinth sealing ring (5) is sleeved on the motor shaft (2) and is interference fit with the motor shaft (2).

4. A motor sealing structure according to claim 1, characterized in that: An installation groove is provided on the outer end surface of the motor end cover (1), and the skeleton oil seal (4) is clamped in the installation groove.

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