A damping and sealing device for a high-power hydrogen-oxygen turbo pump

A technology of sealing device and turbo pump, which is applied to components of pumping device for elastic fluid, jet propulsion device, rocket engine device, etc. , the effect of reducing the circumferential velocity and increasing the logarithmic decay rate

Active Publication Date: 2021-08-10
BEIJING AEROSPACE PROPULSION INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the rotor is disturbed, the large sealing fluid cross stiffness can easily increase the precession amplitude and even cause instability

Method used

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  • A damping and sealing device for a high-power hydrogen-oxygen turbo pump
  • A damping and sealing device for a high-power hydrogen-oxygen turbo pump
  • A damping and sealing device for a high-power hydrogen-oxygen turbo pump

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Experimental program
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Effect test

Embodiment 1

[0031] A low-temperature, high-speed, heavy-duty hydrogen-oxygen turbo pump damping and sealing device (that is, a damping and sealing device for a high-power hydrogen-oxygen turbo pump), which can be applied to the impeller shoulder of a cryogenic pump or the interstage seal of a multi-stage pump, Its structure is composed of a damping sealing assembly 1 and a sealing shaft sleeve 2 . The damping seal assembly 1 is installed on the turbo pump casing 3 through bolt connection, and is a stationary assembly. The shaft sleeve 2 is installed on the rotating shaft 4, and its two sides are respectively clamped by the shafting parts and rotate with the shaft. The schematic diagram of the damping sealing device is shown in figure 1 , the schematic diagram of the damping seal assembly is shown in figure 2 . Such as figure 1 As shown, the right side of the damping seal device is the high-pressure chamber in the pump, and the left side is the low-pressure chamber in the pump. The da...

Embodiment 2

[0039] A low-temperature pump impeller shoulder and a damping seal device between pump stages for high-speed liquid hydrogen and liquid oxygen turbo pumps. Its structure is composed of a static damping seal assembly 1 and a rotating seal bushing 2. For the assembly relationship, see figure 1As shown, the damping seal assembly 1 is assembled on the pump housing 3 of the hydrogen-oxygen turbo pump, and the sealing sleeve 2 is assembled on the rotor sleeve 2 of the turbo pump to rotate with the shaft at high speed.

[0040] The right side of the damping seal device is the high-pressure area of ​​the pump chamber, and the left side is the low-pressure area of ​​the pump chamber. The damping seal can not only limit the leakage rate of the medium inside the pump chamber, but also reduce the cross stiffness of the seal, improve the damping effect, suppress the vibration of the rotor, and improve Rotor stability.

[0041] The damping sealing assembly 1 is brazed by a stainless steel o...

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PUM

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Abstract

A damping and sealing device for a high-power hydrogen-oxygen turbopump, belonging to the technical field of rocket engines, comprising a damping and sealing assembly (1) and a sealing shaft sleeve (2); the damping and sealing assembly (1) is installed on an external turbine pump casing body (3); the sealing sleeve (2) is installed on the outer shaft (4); the damping seal assembly (1) includes a casing (5) and a lining (6); the casing (5) and The inner linings (6) are fitted with tapered surfaces; the inner lining (6) and the sealing sleeve (2) form a friction pair; the inner surface of the inner lining (6) close to the sealing sleeve (2) is provided Arranged holes; the inner liner (6) is provided with anti-rotation blades (9) on the end face of the high-pressure liquid. The invention can improve the throttling capacity, significantly reduce the sealing leakage rate, and significantly improve the stability of the rotor.

Description

technical field [0001] The invention relates to a damping and sealing device for a high-power hydrogen-oxygen turbo pump, which belongs to the technical field of rocket engines. Background technique [0002] The hydrogen-oxygen engine has the advantages of high performance, high reliability, and environmental protection. The world's major aerospace powers have adopted it as the main power system of high-thrust launch vehicles. The hydrogen-oxygen turbo pump is the core component of the hydrogen-oxygen engine, and its technical level often reflects the technical level of the engine. [0003] Compared with small-thrust engines, the working conditions of large-thrust or heavy-duty engine turbopumps are extremely high, and their power is greatly increased. For example, the power of the hydrogen turbopump of the main engine of the space shuttle reaches the megawatt level, and the pump outlet pressure reaches more than 40MPa. In order to meet the comprehensive performance requir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/08F04D29/10F04D29/66F02K9/46
CPCF02K9/46F04D29/083F04D29/102F04D29/668
Inventor 黄克松李小芬叶小强沈文金蒋文山崔垒杨文静周丹洋金志磊林奇燕孙纪国
Owner BEIJING AEROSPACE PROPULSION INST
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