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A shaft end sealing system of a closed cycle rotating machine

A rotating machinery and shaft end sealing technology, which is applied to engine seals, mechanical equipment, engine components, etc., can solve problems such as environmental pollution, working fluid leakage, and working fluid loss, so as to avoid environmental pollution, reduce the amount of leakage, The effect of guaranteed recovery rate

Active Publication Date: 2022-04-12
DONGFANG TURBINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the sealing body used in the above-mentioned device is equivalent to a comb-tooth seal, and the working fluid will still leak from the gap between the sealing body and the rotor, resulting in loss of working fluid
When the working medium is flammable, explosive or toxic and harmful gas, the leaked working medium will pollute the environment

Method used

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  • A shaft end sealing system of a closed cycle rotating machine
  • A shaft end sealing system of a closed cycle rotating machine
  • A shaft end sealing system of a closed cycle rotating machine

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0029] Such as figure 1As shown, the shaft end sealing system of the closed cycle rotary machine in this embodiment includes a rotating shaft, on which there are sequentially arranged a decompression section 1, an air injection section 2, a sealing section 3 and an isolation section 7, the depressurization section 1, the injection section The gas section 2, the sealing section 3, the isolation section 7 and the rotating shaft are all connected with seals; the depressurization section 1 and the gas injection section 2 are connected with a suction pipe 4, and the suction port B of the suction pipe 4 is connected with a working The substance recovery pipeline 5 is connected with a surge tank 51 and a circuit booster pump 52 on the working medium recovery pipeline 5. The loop booster pump 52 is located at the end of the surge tank 51 away from the suction pipe 4, and the outlet of the loop booster pump 52 is It is connected to the inlet of the gas storage tank or the working fluid...

Embodiment 2

[0041] Such as Figure 5 As shown, the shaft end sealing system of the closed cycle rotary machine in this embodiment includes a rotating shaft, on which there are sequentially arranged a decompression section 1, an air injection section 2 and a sealing section 3, and the depressurization section 1, the air injection section 2 and the A seal is connected between the sealing section 3 and the rotating shaft; an air extraction pipe 4 is connected between the depressurization section 1 and the gas injection section 2, and the air extraction port B of the air extraction pipe 4 is connected with a working medium recovery pipeline 5, and the working medium The recovery pipeline 5 is connected with a surge tank 51 and a loop booster pump 52. The loop booster pump 52 is located at the end of the surge tank 51 away from the exhaust pipe 4. The inlet of the quality main circuit is connected; the gas injection pipe 6 is connected between the gas injection section 2 and the sealing sectio...

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Abstract

The invention belongs to the technical field of rotary machines, and in particular relates to a shaft end sealing system of a closed cycle rotary machine. It includes a rotating shaft, on which a decompression section, a gas injection section and a sealing section are sequentially arranged, and seals are connected between the decompression section, the gas injection section, the sealing section and the rotating shaft; the decompression section and the gas injection section A suction pipe is connected between them, and the suction port of the suction pipe is connected with a working medium recovery pipeline, and the working medium recovery pipeline is connected with a surge tank and a circuit booster pump. The outlet of the booster pump is connected to the inlet of the gas storage tank or the main circuit of the working fluid through a pipeline; a gas injection pipe is connected between the gas injection section and the sealing section, and a supplementary valve is connected between the gas injection port of the gas injection pipe and the outlet of the surge tank. The air pipeline is connected with an air booster pump on the air supply pipeline. The invention provides a shaft end sealing system of a closed cycle rotary machine which improves the sealing effect by using the internal working medium as a sealing gas source.

Description

technical field [0001] The invention belongs to the technical field of rotary machines, and in particular relates to a shaft end sealing system of a closed cycle rotary machine. Background technique [0002] In a closed cycle, the internal working medium is limited and some of the working medium may be flammable, explosive or toxic and harmful gases, so the leakage of the working medium must be reduced. In order to effectively reduce the leakage of working fluid and at the same time prevent the leakage of working fluid to the atmosphere, different configurations can be adopted according to the different requirements of the internal working fluid. [0003] The invention patent with the patent application number CN201811108363.1 discloses a low-noise shaft-end sealing structure for rotating machinery, including a stator, a sealing body and a rotor. The sealing body is installed on the stator and placed close to the rotor. A plurality of sealing cavities are provided along the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/40
CPCF16J15/406
Inventor 廖健鑫田瑞青王文武廖翔
Owner DONGFANG TURBINE CO LTD