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Composite decompression liquid sealing structure

A liquid sealing and lip sealing technology, applied in the direction of engine seals, bearing components, engine components, etc., can solve the problems that mechanical seals cannot adapt to high speed, cannot effectively guarantee the sealing effect, and rubber materials are easily vulcanized and damaged. The effect of heating and corrosion, reducing contact pressure and avoiding direct contact

Active Publication Date: 2012-12-05
北京东方精益机械设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the air seal is shut down or the gas is stopped, the liquid in the shafting will leak; and the mechanical seal cannot adapt to high speed, because the mechanical seal is usually sealed by a seal, and the seal is usually made of rubber material or contains rubber, etc. Materials that are easy to wear and corrode, bearings generate a lot of heat during high-speed operation, rubber materials are easily vulcanized and damaged, and the sealing effect cannot be effectively guaranteed

Method used

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  • Composite decompression liquid sealing structure
  • Composite decompression liquid sealing structure
  • Composite decompression liquid sealing structure

Examples

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Effect test

Embodiment 1

[0020] refer to figure 1 , this embodiment provides a composite decompression sealing structure for a vertical high-speed rotating spindle, including a spindle 1, a lip seal 3 for sealing the low-pressure return liquid 2 of the spindle 1, and the above-mentioned lip seal 3 for clamping The end cover 4, the lip seal ring 3 includes a rubber seal ring and a spring ring sleeved in the seal ring; the end cover 4 is provided with a groove 5 at a position adjacent to the lip seal ring and the main shaft, and the groove 5 is connected to an external compressed air machine through a pipeline 7, so that a compressed air channel is formed between the end cover 4, the sealing ring 3 and the main shaft 1; the end of the end cover 4 and the main shaft 1 form an air damping air gap 6, and the air damping air The gap 6 communicates with a compressed air channel which forms a pressure zone.

Embodiment 2

[0022] refer to figure 2 , 3 , the present embodiment provides a compound decompression sealing structure of a hydrostatic guide rail slide table, including a fixed plane long guide rail 11, a sealing strip 13 for sealing the low-pressure return liquid 12 of the fixed plane long guide rail 11 and the above-mentioned clamping The protective cover 14 of the sealing strip 13, the protective cover 14 is provided with a groove 15 at the position adjacent to the sealing strip 13 and the fixed plane long guide rail 11, and the groove 15 is connected with an external compressed air machine through a pipeline 17, so that the protective cover 14 forms a compressed air passage between the sealing strip 13 and the fixed plane long guide rail 11; the end of the protective cover 14 forms an air damping air gap 16 with the fixed plane long guide rail 11, and the air damping air gap 16 communicates with the compressed air passage, The compressed air channel forms a pressure zone.

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Abstract

The invention relates to a composite decompression liquid sealing structure. The structure comprises a work piece, a mechanical sealing element and a protecting cover, wherein the mechanical sealing element is sleeved on the work piece; the protecting cover is sleeved on the work piece to clamp and fix the mechanical sealing element; the connection position of the protecting cover and the mechanical sealing element as well as connection position of the protecting cover and the work piece are respectively provided with a groove; the groove is connected with an external air compression machine;a damping air gap is formed between the end of the protecting cover and the work piece; the damping air gap is communicated with the groove; and a pressure area is formed between the protecting coverand the mechanical sealing element as well as between the protecting cover and the work piece. On the premise of ensuring that the liquid is sealed and not leaked, the problems that when the liquid bearing and the liquid guide rail perform high-speed movement, the mechanical seals have large resistance and generate heat, are successfully solved by using the structure.

Description

technical field [0001] The invention belongs to the field of liquid sealing, and in particular relates to a compound decompression liquid sealing structure. Background technique [0002] There are two original structures of the liquid seal of the liquid bearing: one is a mechanical seal and the other is an air seal. With the development of mechanical structures, the above two structures can no longer meet the requirements of liquid sealing in special working conditions of high-speed movement. For example, the high-speed vertical grinding head has a high speed, and the rotating sealing part is at the bottom of the shafting. When the air seal is shut down or the gas is stopped, the liquid in the shafting will leak; and the mechanical seal cannot adapt to high speed, because the mechanical seal is usually sealed by a seal, and the seal is usually made of rubber material or contains rubber, etc. For materials that are easy to wear and corrode, the bearing generates a lot of he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/40F16J15/54F16J15/32F16C33/74F16J15/3208F16J15/3284
Inventor 李维涛
Owner 北京东方精益机械设备有限公司