Pressure balance type seal method and its use

A balanced and pressure technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve problems such as failure of sealing device, large pressure difference of mechanical seal, hydraulic splitting of rubber seal interface, etc., to ensure consistency, guarantee Accuracy and improved service life

Inactive Publication Date: 2006-03-22
INST OF MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in measurement environments such as deep water or high-pressure vessels, the pressure difference between the inside and outside of the...

Method used

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  • Pressure balance type seal method and its use
  • Pressure balance type seal method and its use

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Embodiment Construction

[0022] In the measurement environment, the present invention transmits the pressure difference outside the measurement tool to the measurement tool by setting a film made of waterproof flexible material on the measurement tool, and reduces the pressure difference between the inside and outside of the measurement tool. Realize the sealing of the measuring tool.

[0023] figure 1 and 2 Among them, one side of the sensitive element 1 is located on the inner wall 8 of the pressure balance sensor cavity, and the surface of the other side of the sensitive element 1 is coated with petroleum jelly 4, and the petroleum jelly 4 seals the sensitive element 1 with oil. On the outer surface of the vaseline 4, a layer of waterproof rubber 2 is covered. The waterproof rubber 2 has good elasticity, and a wire mesh 3 is also arranged on the surface of the waterproof rubber 2. A washer 6 is arranged on the edge of the waterproof rubber 2, and the edge of the waterproof rubber 2 is pressed aga...

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Abstract

The present invention discloses one kind of pressure balancing seal method. In measurement environment, the pressure difference between inside the measuring tool and outside the measuring tool is reduced to realize the seal of the measuring tool. The present invention discloses also one kind of sensor operating on the pressure balancing seal method, and the sensor includes sensor cavity and sensing element set on the inner wall of the cavity. On the outer surface of the sensing element, a sealing film of waterproof elastic polymer material and a metal net over the film are coated, and the sealing film has its edges fixed to the inner wall of the cavity by means of sealing unit. The present invention ensures the basically identical pressure between the inside of the measuring tool cavity and the outside to avoid leakage, and the measuring tool in the said sealing method has simple structure, long service life and high measurement precision.

Description

technical field [0001] The invention relates to a sealing method, in particular to a pressure-balanced sealing method and its application. Background technique [0002] Measuring tools such as sensors currently used generally adopt sealing methods such as mechanical and rubber seals to seal sensitive components and electrical components in the cavity of the sensor or the surface of the object to be measured. However, in measurement environments such as deep water or high-pressure vessels, the pressure difference between the inside and outside of the mechanical seal cavity is large, and the seal interface is prone to hydraulic splitting. Under a certain pressure, the sealing device will fail. Contents of the invention [0003] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a pressure-balanced sealing method that keeps the internal pressure of the sealed cavity of the sensitive element basically consistent with the external e...

Claims

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Application Information

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IPC IPC(8): F16J15/02
Inventor 丁桦时忠民杨兵郭馗申仲翰
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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