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Spherical seal joints for hydraulic testing of turbopumps for liquid rocket engines

A technology of spherical sealing and sealing joints, which is applied in the direction of rocket engine devices, machines/engines, pipes/pipe joints/fittings, etc., can solve problems such as high cost, poor sealing performance, and damage to the sealing surface of turbo pumps, and achieve easy replacement and improvement The effect of service life and convenient processing

Active Publication Date: 2022-05-10
XIAN AEROSPACE PROPULSION INST
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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 solve the problem of easy damage to the sealing surface of the turbo pump in the prior art, poor sealing, poor versatility, and high cost, and to provide a spherical sealing joint for the hydraulic test of the turbo pump of the liquid rocket engine

Method used

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  • Spherical seal joints for hydraulic testing of turbopumps for liquid rocket engines
  • Spherical seal joints for hydraulic testing of turbopumps for liquid rocket engines
  • Spherical seal joints for hydraulic testing of turbopumps for liquid rocket engines

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Embodiment one: if figure 1 , figure 2 , image 3 As shown, the spherical joint for liquid rocket engine turbo pump hydraulic test provided by the present invention includes a sealing joint 1 and a spherical sealing gasket 2;

[0046] The sealing joint 1 is provided with a stepped sealing surface 11, a radial sealing surface 12 and bolt holes 13;

[0047] The step sealing surface 11 is parallel to the end surface 14 of the sealing joint;

[0048] The radial sealing surface 12 is located between the sealing joint end surface 14 and the stepped sealing surface 11 and is perpendicular to the stepped sealing surface 11;

[0049] The spherical sealing gasket 2 includes an end face mating surface 21, a radial mating surface 22, and a spherical mating surface 23;

[0050] The end face mating surface 21 is in close contact with the stepped sealing surface 11; the radial mating surface 22 is in close contact with the radial sealing surface 12;

[0051] The spherical fittin...

Embodiment 2

[0053] Embodiment two: if Figure 4 As shown, two sealing thorns 3 are arranged on the step sealing surface 11; the end face mating surface 21 is in close contact with the step sealing surface 11, and the radial mating surface 22 is interference fit with the radial sealing surface 12; The spherical fitting surface 23 is matched with the concave spherical surface 5 of the sealing joint of the turbo pump.

Embodiment 3

[0054] Embodiment three: as Image 6 As shown, two sealing thorns 3 are arranged on the step sealing surface 11 and the radial sealing surface 12; The surface 12 is interference fit; the spherical fitting surface 23 is matched with the concave spherical surface 5 of the sealing joint of the turbo pump.

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Abstract

The invention relates to the technical field of turbopump sealing, in particular to a sealing joint used for a hydraulic test of a turbopump of a liquid rocket engine. The purpose of the invention is to solve the problems in the prior art that the sealing surface of the turbo pump is easy to be damaged, and the sealing performance is poor, the versatility is poor, and the cost is high. The sealing joint is provided with a step sealing surface, a radial sealing surface and a bolt hole; the step sealing surface is parallel to the end surface of the sealing joint; the radial sealing surface is located between the end surface of the sealing joint and the step sealing surface and is perpendicular to the step sealing surface; the step sealing The surface fits with the end face mating surface; the radial sealing surface fits with the radial mating surface; the spherical mating surface matches the concave spherical surface of the turbo pump sealing joint. The spherical sealing joint used for the hydraulic test of the turbo pump of the liquid engine provided by the invention can improve sealing performance and lower cost through the cooperation of the spherical sealing gasket with the end surface and the radial sealing surface.

Description

technical field [0001] The invention relates to a sealing joint for a hydraulic test of a turbo pump, in particular to a spherical sealing joint for a hydraulic test of a turbo pump of a liquid rocket engine. Background technique [0002] Most of the existing liquid rocket engine turbopump interfaces adopt a spherical sealing structure, and a sealing band is formed between the concave spherical surface and the convex spherical surface through a metal hard connection for sealing. However, the hydraulic test of the turbo pump is an important part of the acceptance of the turbo pump of the liquid rocket engine. If the existing sealing method is used, it is easy to cause damage to the sealing surface of the turbo pump. In severe cases, the sealing surface will fail and the product will be scrapped; Long-term repeated use of the convex spherical test process equipment with spherical surfaces will cause serious wear and tear of the process equipment, making the seal invalid, and i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L27/06F02K9/96
CPCF16L27/06F02K9/96
Inventor 冯子政李随波许元赵艳丽李龙刘成胜王良
Owner XIAN AEROSPACE PROPULSION INST