Ejector capable of cooling valve core needle through cooling working medium

A technology for cooling working fluid and ejector, applied in the direction of jet pump, jet device, liquid jet device, etc., can solve problems such as motor damage, achieve the effect of simple structure, increase the scope of application of working conditions, and small volume

Active Publication Date: 2021-05-25
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in some injector applications, the temperature of the primary flow passing through the valve core needle will exceed this temperature, which will cause damage to the motor

Method used

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  • Ejector capable of cooling valve core needle through cooling working medium
  • Ejector capable of cooling valve core needle through cooling working medium

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Experimental program
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Embodiment Construction

[0011] The injector proposed by the present invention utilizes the cooling working fluid to cool the spool needle, and its structure is as follows: figure 1 As shown, it includes stepper motor 1, cooling section 9, nozzle 4, secondary flow suction chamber 5 and spool needle 2; the stepping motor 1, cooling section 9, nozzle 4 and secondary flow suction chamber 5 are the same Shaft installation, a sealing element 3 is provided between the cooling section 9 and the nozzle 4, the valve core needle 2 is placed on the central axis of the cooling section 9 and the nozzle 4, and the valve core needle 2 passes through the middle hole of the sealing element 3 After that, the output shaft of the stepping motor 1 is linked with the spool needle 2; the nozzle 4 is inserted into the secondary flow suction chamber 5; the cooling section 9 is provided with a cooling medium inlet 8 and a cooling medium outlet 10 One end of the nozzle 4 close to the sealing element 3 is provided with a primary...

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PUM

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Abstract

The invention belongs to the technical field of energy and power, and particularly relates to an ejector capable of cooling a valve core needle through a cooling working medium. According to the ejector capable of cooling the valve core needle through the cooling working medium, a cooling section is arranged between a stepping motor and a nozzle, the stepping motor, the cooling section and the nozzle are coaxially arranged, the cooling working medium and primary flow are isolated through a partition plate and a sealing element, the cooling working medium is introduced into the cooling section, the valve core needle in the ejector can be effectively cooled, and the adjusting function of the valve core needle for the throat area of the nozzle is not affected, so that the performance of the ejector is effectively improved. In addition, the ejector capable of cooling the valve core needle through the cooling working medium has the advantages of being simple in structure, small in size and convenient to mount, and after the valve core needle is cooled, the adjustable ejector can be applied to the field of high-temperature primary flow.

Description

technical field [0001] The invention belongs to the technical field of energy and power, and in particular relates to an injector which uses a cooling working fluid to cool a valve core needle. Background technique [0002] The injector has simple structure, low cost, easy operation and convenient maintenance, and is widely used in many fields such as refrigeration, fuel cells, chemical industry and aerospace. Ejectors are also called jet vacuum pumps, jet vacuum ejectors, jet pumps, water ejectors, vacuum ejectors, etc. according to their use. As a pressurization, vacuum, and mixing device, the ejector often plays the role of a key component in the system. Improving the performance of injectors can increase the overall system efficiency in the related industries. [0003] The size of the injector affects the performance of the injector. In specific applications, the system often needs to change the operating parameters, so the requirements for the variable operating cond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05B7/04B05B7/16
CPCB05B7/04B05B7/16F04F5/461F04F5/462F04F5/16F04F5/10
Inventor 祝银海姜培学
Owner TSINGHUA UNIV
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