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Design method of high-pressure-ratio multistage axial-flow type hydraulic turbine

A technology of hydraulic turbine and design method, applied in the field of rotating fluid machinery, to achieve the effect of ensuring safety margin, improving efficiency and improving processing efficiency

Pending Publication Date: 2021-03-02
BEIJING AEROSPACE PROPULSION INST
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Problems solved by technology

[0003] The technical problem solved by the present invention is: in view of the lack of a hydraulic turbine for the special requirements of the oxygen pre-compression turbo pump of the high-pressure supplementary combustion liquid rocket engine in the current prior art, a high-pressure ratio multi-stage axial flow hydraulic turbine is proposed. Turbine Design Method

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  • Design method of high-pressure-ratio multistage axial-flow type hydraulic turbine
  • Design method of high-pressure-ratio multistage axial-flow type hydraulic turbine
  • Design method of high-pressure-ratio multistage axial-flow type hydraulic turbine

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Embodiment Construction

[0034] A high-pressure ratio multi-stage axial-flow hydraulic turbine design method, adopting 6-stage axial-flow design, designing meridian flow channels through liquid working fluid to ensure that the flow velocity triangle of liquid working fluid at each level is the same, and determining the matching method between stages, Ensure that the output power is evenly distributed among the stages, and the internal stress of the rotor blades is evenly distributed, thus ensuring the safety margin of the rotor blades at all levels. The improvement of machining efficiency and the reduction of machining difficulty.

[0035] The specific steps of the multi-stage axial-flow hydraulic turbine design method are as follows:

[0036] (1) Runner design according to the type of working fluid;

[0037] Wherein, the type of working medium is liquid working medium, and the flow channel is designed as a meridian flow channel of equal cross section, which converts the pressure potential energy of ...

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Abstract

A design method of a high-pressure-ratio multistage axial-flow type hydraulic turbine adopts six-stage axial-flow type design, meridian flow channels are designed through liquid working media so as toguarantee that the flowing speed triangles of the liquid working media at all stages are the same, an inter-stage matching mode is determined, and it is guaranteed that output power is evenly distributed among all stages and stress borne by the interior of a movable blade is evenly distributed. And meanwhile, through the stationary blade profile design and the movable blade profile design, the machining efficiency of the hydraulic turbine is improved, and the machining difficulty of the hydraulic turbine is lowered.

Description

technical field [0001] The invention relates to a design method of a high-pressure ratio multistage axial-flow hydraulic turbine, which belongs to the field of rotary fluid machinery. Background technique [0002] The hydraulic turbine is a fluid rotary machine that uses the kinetic energy and pressure potential energy of the liquid working medium to drive the output shaft work of the turbine. The multi-stage axial-flow hydraulic turbine is suitable for converting the high-pressure ratio liquid working fluid into shaft power output. It has the characteristics of small size and compact structure. It is an important component of the high-thrust afterburning cycle rocket engine. Overall performance and overall reliability of the oxygen pre-compression pump. The multi-stage axial flow hydraulic turbine relies on the high-pressure liquid fluid to convert energy step by step between the moving and stationary blades to realize the efficient conversion of the pressure potential ene...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F30/28G06F113/08G06F119/14
CPCG06F30/17G06F30/28G06F2113/08G06F2119/14Y02E10/20
Inventor 李龙贤林奇燕林蓬成郑晓宇王雪纯李龙廖懂华魏沫金志磊
Owner BEIJING AEROSPACE PROPULSION INST
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