A pintle injector with adjustable flow rate and easy installation

Abstract

The invention discloses a flow-adjustable and easy-to-install pintle injector. The flow-adjustable and easy-to-install pintle injector comprises a central rod, a rotary clamping sleeve, a rotary driving mechanism and a clamping plate. The center of the central rod is provided with an inner flow channel, and the bottom of the central rod is provided with a plurality of inner flow channel communication holes; the rotary clamping sleeve coaxially sleeves the periphery of the central rod and can rotate, and the rotary clamping sleeve comprises an outer sleeve shell, an inner sleeve shell, an annular top cover and an outer flow channel; inner flow channel spray holes are formed in the bottom of the inner sleeve shell, and a plurality of outer flow channel spray holes are formed in the annular top cover; and the clamping plate coaxially sleeves the portion, located at the top of the clamping sleeve, of the periphery of the central rod, the center of the clamping plate is provided with a liquid collection cavity, and the bottom of the liquid collection cavity is provided with an outer flow channel communication hole. When the rotary clamping sleeve rotates, the outer flow channel spray holes can form plugging or communicating with the outer flow channel communication hole, and the inner runner spray holes can form plugging or communicating with the inner flow channel communication holes. The flow-adjustable and easy-to-install pintle injector has the advantages of simple structure and easy installation, the cooperative regulation of the flows of two propellants can be achieved, and the synchronous regulation of the two propellants is achieved.

Description

technical field [0001] The invention relates to space propulsion technology, in particular to a pintle injector with adjustable flow rate and easy installation. Background technique [0002] Compared with the typical impingement or coaxial nozzles used in bicomponent liquid rocket engines, pintle injectors have unique geometric and injection characteristics. The pintle injector can produce high combustion efficiency and has the following advantages: strong adjustment ability, surface shutdown feature, low cost, high reliability and safe operation. For pinpin engines, the total momentum ratio (TMR) is the most important design parameter, defined as the ratio of radial momentum to axial momentum. [0003] In the prior art, the main problem of the pintle injector is that the flow adjustment method is relatively complicated, and in the traditional pintle injector, the flow rates of the two propellants are controlled separately, and in the control of the momentum ratio (TMR), S...

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Problems solved by technology

[0003] In the prior art, the main problem of the pintle injector is that the flow adjustment method is relatively complicated, and in the traditional pintle injector, the flow rates of the two propellants are controlled separately, and in the control of the momentum ratio (TMR), Can not achieve synchronous adjustment, get the expected momentum ratio

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