CN201490807U - A sealing device used between motors and structural components - Google Patents

Abstract

The utility model discloses a sealing device used between a motor and a structural component. The sealing device comprises a casing (2); the interior of the casing (2) is divided into a high-pressure cavity (4) and a negative-pressure cavity (6) through a separating plate (5); the high-pressure cavity (4) is connected with an inlet connecting pipe (3); and the negative-pressure cavity (6) is connected with an air exhaust connecting pipe (9). The sealing device with good sealing quality and simple structure excellently prevents environmental liquid form leaking in the motor and impurities in the motor from leaking out in the environmental liquid.

Description

A sealing device used between motors and structural components

technical field

The utility model relates to the sealing field of a motor, in particular to a sealing device used between a motor and structural components.

Background technique

At present, the shaft end seal of the motor commonly used in the prior art is sealed through the gap between the rotating shaft and the casing with a rubber seal ring, etc. This structure can well meet the sealing requirements of environmental liquids under general environmental conditions. Requirements, but for the environment with special requirements, the sealing structure such as the sealing ring can no longer meet the sealing requirements, and it needs to be further sealed.

Contents of the invention

The utility model overcomes the deficiencies in the prior art and provides a sealing device with good sealing performance and simple structure used between the motor and the structural components.

In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

A sealing device used between a motor and a structural component, including a housing, the key point is that the housing is divided into a high-pressure chamber and a negative-pressure chamber through a partition plate, and the high-pressure chamber is connected to the inlet nozzle. The negative pressure chamber is connected to the suction pipe.

There is one high-pressure chamber and one negative-pressure chamber respectively.

Compared with the prior art, the beneficial effect of the utility model is that the device can realize dynamic sealing through the cooperation of the high-pressure chamber and the negative-pressure chamber inside the shell, further strengthen the sealing effect, and prevent the liquid from leaking into the motor. , It also prevents the leakage of impurities in the motor.

Description of drawings

Figure 1 Sectional view of the sealing device

1. Structural components, 2. Shell, 3. Inlet connection, 4. High pressure chamber, 5. Partition plate, 6. Negative pressure chamber, 7. Motor, 8. Output shaft, 9. Air extraction connection

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

The sealing device shown in Figure 1 is installed between the motor and the structural components. The sealing device establishes a transition zone between the motor 7 and the structural component 1 to achieve isolation on both sides. The sealing device is connected to the motor 7 and the structural component 1 by welding. .

The device includes a housing 2, and the housing 2 is divided into a plurality of high-pressure chambers and negative-pressure chambers through a partition plate 5. In this embodiment, one high-pressure chamber 4 and one negative-pressure chamber 6 are taken as examples. To illustrate. The output shaft 8 continuously runs through the structural component 1 , the casing 2 , the partition plate 5 , the high pressure chamber 4 and the negative pressure chamber 6 , and dynamic sealing can be realized through the high pressure chamber 4 and the negative pressure chamber 6 . The high-pressure chamber 4 is connected to the inlet connecting pipe 3 for feeding compressed gas into the high-pressure chamber 4; the negative-pressure chamber 6 is connected to the suction connecting pipe 9 and connected to the negative-pressure system.

When the submerged motor 7 is working, the power output must be realized through the output shaft 8. While outputting power, the output shaft 8 must pass through the motor casing, which may cause external liquid to leak into the motor 7 or the lubricating oil in the motor 7 to leak to the outside in liquid. First, the external compressed air system feeds compressed air (air or helium, etc.) into the high-pressure chamber 4 through the inlet connection 3, so that the gas pressure in the high-pressure chamber 4 is higher than the liquid pressure in the external environment, and the gas can leak out, and the liquid Do not leak in. Connect with the vacuum system and other negative pressure systems through the suction connecting pipe 9, so that the pressure of the negative pressure chamber 6 is lower than the pressure of the high pressure chamber 4, and the gas leaks from the high pressure chamber 4 into the negative pressure chamber 6 to prevent the motor 7 from impurities leak out. The external compressed gas system works continuously to supplement the gas leaked during the working process.

Claims (2)

1. A sealing device used between a motor and a structural part, comprising a housing (2), is characterized in that, the housing (2) is divided into a high-pressure chamber ( 4) and the negative pressure chamber (6), the high pressure chamber (4) is connected with the inlet connection pipe (3), and the negative pressure chamber (6) is connected with the suction connection pipe (9). 2. The sealing device used between the motor and the structural components according to claim 1, characterized in that there is one high-pressure chamber (4) and one negative-pressure chamber (6).