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Large-flow cryogenic gas bearing turbo expander

A turboexpander and gas bearing technology, which is applied in the field of expanders, can solve the problems such as the decrease of expansion efficiency and the temperature of the main shaft of the expander, and achieve the effect of speeding up the maintenance efficiency.

Active Publication Date: 2022-05-13
杭州新亚低温科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a large-flow cryogenic gas bearing turbo expander, which is used to solve the problem that the heat conduction of the shell of the existing expander will reduce the temperature of the main shaft of the expander, resulting in a decrease in expansion efficiency

Method used

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  • Large-flow cryogenic gas bearing turbo expander
  • Large-flow cryogenic gas bearing turbo expander
  • Large-flow cryogenic gas bearing turbo expander

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] see Figure 1-2 As shown, a large-flow cryogenic gas bearing turbo expander includes a casing 1, the top surface and the bottom surface of the center of the casing 1 are respectively provided with a bearing gas inlet 2 and a bearing gas outlet 3, and the center of the casing 1 is provided with a bearing gas inlet 2 and a bearing gas outlet 3. The inner wall is provided with two symmetrical support bearings 4, and the inner rings of the two support bearings 4 are movably connected with a main shaft 5, and the two ends of the main shaft 5 are respectively installed with an expansion impeller 6 and a compression impeller 7, and the housing 1 is close to the expansion impeller The inner wall of one side of 6 is provided with a heat-insulating sealing plate 8, and the heat-insulating sealing plate 8 forms a heat-insulating sealing cavity with the inner wall of the housing 1, and an annular sealing plate 9 is arranged in the heat-insulating sealing cavity, and the inner surfac...

Embodiment 2

[0055] see image 3 As shown, a processor is provided on the outer surface of the casing 1, and the processor is connected to an acquisition module, an expansion detection module, a driving detection module, a sealing detection module and a storage module in communication.

[0056] The acquisition module includes a temperature sensor, an air flow sensor and a rotational speed sensor.

[0057] The sealing detection module is used to detect and analyze the heat conduction efficiency of the sealing gas: obtain the temperature performance values ​​of the sealing gas inlet 14 and the sealing gas outlet 15 in real time and mark them as JWm and CWm respectively, and the temperature performance value JWm of the sealing gas inlet 14 is the sealing inlet The average value of the gas temperature value of the gas port and the temperature value of the inner wall of the sealed air inlet passage 12, the gas temperature value and the inner wall temperature value are directly collected by the ...

Embodiment 3

[0065] see Figure 4 As shown, a working method of a large-flow cryogenic gas bearing turboexpander comprises the following steps:

[0066] Step 1: Input gas at the bearing gas inlet 2 to control the rotation of the main shaft 5. When the main shaft 5 rotates, the expansion impeller 6 and the compression impeller 7 on both sides rotate synchronously. When the helium gas passes through the expansion impeller 6, the low-temperature helium gas flows in the channel that becomes larger and larger, and the pressure and velocity of the low-temperature helium gas decrease to reduce the internal energy of the gas and the temperature of the gas;

[0067] Step 2: While the main shaft 5 is rotating, gas is input into the sealing gas inlet 14. After heat exchange between the gas and the main shaft 5 is completed, the gas is discharged from the housing 1 through the sealing gas outlet channel 13 and the sealing gas outlet 15, and the gas in the sealing gas inlet channel 12 is supplied to th...

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Abstract

The invention belongs to the technical field of expansion machines, aims to solve the problem that the expansion efficiency is reduced due to the fact that the temperature of a main shaft of an existing expansion machine is reduced due to heat conduction of a shell of the existing expansion machine, and particularly relates to a large-flow cryogenic gas bearing turbo-expansion machine which comprises a shell. A bearing gas inlet and a bearing gas outlet are formed in the top face and the bottom face of the center position of the shell respectively, two symmetrical supporting bearings are arranged on the inner wall of the center position of the shell, a main shaft is movably connected between inner rings of the two supporting bearings, and an expansion impeller and a compression impeller are installed at the two ends of the main shaft respectively. Helium and the inner wall of the shell are separated through the heat insulation sealing cavity formed by the heat insulation sealing plate and the inner wall of the shell, the situation that low-temperature helium makes direct contact with the inner wall of the shell, and consequently the temperature of the shell is rapidly reduced is avoided, and therefore the influence of the low-temperature helium on the temperature of the spindle is reduced, and it is guaranteed that the spindle can rotate normally; and the expansion impeller normally rotates to expand the low-temperature helium.

Description

technical field [0001] The invention belongs to the technical field of expanders, in particular to a large-flow cryogenic gas bearing turbo expander. Background technique [0002] The expander is a machine that uses the principle of outputting mechanical work to reduce the temperature of the gas to obtain cooling capacity when the compressed gas expands and depressurizes. The expander is often used in cryogenic equipment. The expander is divided into a piston expander and a piston expander according to the movement form and structure. There are two types of turbo expanders. Piston expanders are mainly suitable for small and medium-sized high- and medium-pressure cryogenic equipment with high pressure ratio and small flow; [0003] When the low-temperature helium is expanded through the expander, the temperature of the main shaft of the expander will decrease under the heat conduction of the shell of the expander, which will affect the rotation speed of the main shaft and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D15/08F01D25/14F01D25/10F01D21/00G01D21/02F04D25/04
CPCF01D15/08F01D25/145F01D25/10F01D21/003G01D21/02F04D25/045
Inventor 安丽丽章轶明孙立东范瑞欣孙李龙姜永亮张笑波吴佳麟
Owner 杭州新亚低温科技有限公司
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