A tightening method for a shaft system of a helium gas turbine and an axially loaded tightening tool
A technology of turbine shaft and axial loading, applied in metal processing, metal processing equipment, manufacturing tools, etc., can solve the problems of large plastic deformation and fracture of slender shafts, solve the problem of tightening, avoid shaft damage, and avoid strength damage effect
Active Publication Date: 2020-06-30
XIAN AEROSPACE PROPULSION INST
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Problems solved by technology
If a torque of equal magnitude and opposite direction is applied to both ends of the shaft to tighten the shaft system, it may cause large plastic deformation or even fracture of the slender shaft. Therefore, how to tighten the shaft system of a small and compact helium turbine is an advanced One of the problems that technicians urgently need to solve
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[0038] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the disclosed embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0039] The invention discloses a tightening method of a helium turbine shaft system, which can be used for tightening a helium turbine shaft system for a pre-cooled air turbine rocket engine, and is particularly suitable for tightening a small and compact helium turbine shaft system.
[0040] Such as Figure 1~4 In this embodiment, the tightening method of the helium turbine shaft system includes:
[0041] In step 101, the parts of the shaft system are sequentially installed on the central shaft 5 according to the assembly relationship.
[0042] In this embodiment, as figure 2 , Each part of the shaft system may specifically include: a central shaft 5, a turbine shaft end nut 6, a turbine disk 7, a compressor wheel 15 and a compressor sh...
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The invention discloses a tightening method for a helium turbine shaft system and an axial loading type tightening tool. The method comprises the following steps that all the parts of the shaft systemare sequentially arranged on a central shaft according to the assembling relation; through the axial loading type tightening tool, a turbine shaft-end nut is tightened and assembled until the turbineshaft-end nut cannot continuously rotate; through the axial loading type tightening tool, a gas compressor shaft-end nut is tightened and assembled until the gas compressor shaft-end nut cannot continuously rotate so that assembling of all the parts of the shaft system can be completed. According to the tightening method for the helium turbine shaft system and the axial loading type tightening tool, the shaft-end nuts are tightened in shaft loading state, and the pre-tightening force is generated by utilizing the elastic deformation recovery after unloading of the shaft, so that the operationof generating the pre-tightening force by applying the torque on the shaft is avoided, and a product is protected against being damaged.
Description
Technical field [0001] The invention belongs to the technical field of pre-cooled air turbo rocket engines, and in particular relates to a tightening method of a helium turbine shaft system and an axial loading type tightening tool. Background technique [0002] The helium turbine is a key basic technology of the pre-cooled air turbine rocket engine. As a part of the aircraft, its space size and structural weight are strictly restricted. Due to the above constraints, the shaft of the helium turbine for the pre-cooled air turbo rocket engine is designed to be slender and long, and the layout of the parts on the shaft system is extremely compact. When the shaft system is tightened during the assembly process, there are only threaded sections at both ends of the shaft head. Can be capitalized. If equal and opposite torque is applied to both ends of the shaft to tighten the shafting, the slender shaft may undergo greater plastic deformation or even fracture. Therefore, how to tighte...
Claims
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IPC IPC(8): B23P19/06
CPCB23P19/06
Inventor 贾少锋朱东华耿海鹏严俊峰许开富张鹏飞齐琛
Owner XIAN AEROSPACE PROPULSION INST