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Nozzle-adjustable steam ejector

An injector and adjustable technology, which is applied in jet pumps, non-displacement pumps, machines/engines, etc., can solve problems such as poor sealing effect, achieve low processing and manufacturing costs, save power steam, and be easy to disassemble.

Active Publication Date: 2015-06-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods can make the injector better adapt to variable working conditions, but they often have the disadvantage of poor sealing effect

Method used

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  • Nozzle-adjustable steam ejector
  • Nozzle-adjustable steam ejector
  • Nozzle-adjustable steam ejector

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with specific examples.

[0029] Such as figure 1 As shown, a steam injector with an adjustable nozzle includes an injector housing 1 , a spray pipe 2 and a bellows 3 . The injector housing 1 has a suction chamber 11, a mixing chamber 12 and a diffuser chamber 13 inside. The connection between the suction chamber 11 and the mixing chamber 12 is a throat 14. The injector housing 1 is also provided with a valve communicating with the suction chamber 11. Introduce steam inlet 15. The nozzle 2 has a nozzle 21 extending into the suction chamber 11, the nozzle 21 is facing the throat 14, and the axis of the nozzle 2 is at the center of the throat 14.

[0030] The periphery of the nozzle pipe 2 is sealed with a fixed ring 22, and the fixed ring 22 and the nozzle pipe 2 are welded into an integral structure. One end of the bellows 3 is fixedly connected to the fixed ring 22, and the other end is fixedly con...

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PUM

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Abstract

The invention discloses a nozzle-adjustable steam ejector. The nozzle-adjustable steam ejector comprises an ejector housing with a suction chamber, a mixing chamber and a diffusing chamber inside, and a spray pipe which is partially inserted into the suction chamber, wherein the spray pipe is provided with a nozzle which faces to the mixing chamber. The nozzle-adjustable steam ejector further comprises a retractable pipe which is hermetically connected with the ejector housing and the spray pipe, and an adjusting device which is used for adjusting the distance between the nozzle and the mixing chamber; a guide mechanism is arranged between the spray pipe and the ejector housing. The nozzle-adjustable steam ejector disclosed by the invention has the advantages that of simple structure, low manufacturing cost and simplicity and convenience in installation and disassembling. Not only can the distance between the nozzle and the inlet of the mixing chamber be adjusted, can the performance of the steam ejector be improved and can the ejector be kept to have the optimum working performance within a wider operating range, but also the sealing performance is not influenced during adjustment of the distance between the nozzle and the suction chamber since the spray pipe is hermetically connected with the nozzle with the ejector housing by adopting the retractable pipe, and the problem of leakage caused by a reason that the sealing performance is poor or becomes deteriorated does not exist.

Description

technical field [0001] The invention relates to a steam injector, in particular to an adjustable nozzle steam injector. Background technique [0002] A general steam injector consists of four parts: nozzle, injection chamber, mixing chamber and diffuser chamber. Its working principle is: power steam enters the nozzle for adiabatic expansion and forms a supersonic flow at the outlet of the nozzle, the high-speed airflow in the ejector chamber drives the ejected steam to flow along the axial direction of the ejector, and the mixing speed of the two steams in the mixing chamber decreases to the speed of sound Next, the flow rate of mixed steam in the diffuser chamber decreases and the pressure increases to reach the required parameters for steam discharge. [0003] The ejector is a widely used fluid mechanical structure, which uses the jet of working fluid to realize energy conversion, and has the advantages of remarkable energy saving effect, low pollution working performance...

Claims

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Application Information

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IPC IPC(8): F04F5/16F04F5/46
CPCF04F5/16F04F5/461
Inventor 何一坚张吉李佳碧蒋云云王祎
Owner ZHEJIANG UNIV
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