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Liquid expander

A liquid expansion and casing technology, which is applied in the field of liquid expanders for low-temperature and high-pressure liquid throttling and pressure reduction, to achieve the effects of flexible braking, reduced energy consumption, and zero leakage

Active Publication Date: 2010-02-10
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of all-liquid expander for liquid throttling, which can effectively solve the negative impact brought by the coke-soup throttling valve in the existing traditional air separation process

Method used

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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0016] Such as figure 1 figure 2 As shown, an expander for liquid throttling includes a bearing housing 1; support-thrust bearings 3, 5, a rotor; an intermediate piece 17; a nozzle assembly; The casing 6 includes a working fluid inlet pipe and a working fluid outlet 30 , and a hole 31 and a designed volute guide channel are processed inside the casing 6 . The rotor includes a main shaft 4, an oil throwing ring 18 and an impeller 9 are arranged at the front of the main shaft 4, and the impeller 9 is connected with the main shaft through an impeller positioning screw 11, and a coupling 2 is arranged at the rear end. The nozzle assembly includes a nozzle platen 12 , a nozzle cover 13 , a nozzle vane 14 , a nozzle turntable 15 and a nozzle chassis 16 , and the nozzle cover 13 , nozzle vane 14 and nozzle turntable 15 are axially connected togeth...

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Abstract

The invention discloses a liquid expander comprising a bearing box, a rotor, a spray nozzle assembly and an expander casing. The liquid expander is characterized in that the spray nozzle assembly comprises a spray nozzle press plate, a spray nozzle cover, a spray nozzle vane, a spray nozzle turntable and a spray nozzle chassis, wherein the spray nozzle cover, the spray nozzle vane and the spray nozzle turntable are sequentially connected together in an axial direction by a cylinder pin, and the spray nozzle press plate and the spray nozzle cover are elastically connected in the axial direction; the spray nozzle turntable is connected on the external diameter of a step circle of the spray nozzle chassis in a circumferential rotation way; both axial ends of the spray nozzle chassis are respectively connected with the expander casing and the bearing box; a middle component is arranged between the bearing box and the axial direction of the spray nozzle chassis; the rotor comprises a main shaft, the front part of the main shaft is provided with an oil thrower, and the back part of the main shaft is provided with a shaft coupling; shaft necks at both sides of the main shaft are fixed inthe bearing box in a rotation way, and the front end of the main shaft passes through the spray nozzle and the middle component and is connected with an impeller;]the oil thrower is positioned at theposition of the middle component in the axial direction; and a position from the wheel back side of the impeller to the main shaft section of the oil thrower is provided with a shaft sealer in the axial direction, and the shaft sealer has a compound sealed structure.

Description

technical field [0001] The invention relates to a liquid expander, in particular to a liquid expander for throttling and reducing pressure of low temperature and high pressure liquid. Background technique [0002] In air separation, nitrogen liquefaction, liquefied natural gas, hydrocarbon processing and other liquefaction circulation devices, the obtained high-pressure liquid needs to be depressurized according to the process requirements. At present, the traditional coke-soup liquid throttle valve is usually used to complete it, but it is a typical irreversible process, which will cause energy waste of high-pressure liquid, and dissipate it in the low-temperature system, resulting in temperature rise and loss of cooling capacity of the system. Moreover, the flow state of the pressure-reducing liquid using the throttle valve changes drastically, and vaporization easily occurs, which reduces the gas extraction rate of the air separation plant and increases the total energy c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D1/02F01D9/02F01D5/02F01D11/00F01D25/18F01D25/24F01D25/16F01D5/14
Inventor 孙金菊王科宋鹏蔡国成付栋梁
Owner XI AN JIAOTONG UNIV
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