阅读说明：本技术 一种装配用盲腔结构过盈装配转子冷装弹性引导装置 (Blind cavity structure interference fit rotor cold-assembling elastic guiding device for assembly ) 是由 杜立峰 金少博 阚敏 巩孟祥 王欢 于 2020-11-25 设计创作，主要内容包括：本发明公开一种装配用盲腔结构过盈装配转子冷装弹性引导装置,引导轴为主体结构零件,为空腔管状结构,右端为大径并带有台阶,其大径与低压涡轮轴端内控大径向配合,其上有三个径向固定孔,孔边焊接一个止动销,左端为锥状引导结构；采用把手将螺杆向内旋入,压紧芯轴向内侧移动压缩大压缩弹簧,芯轴向内旋移动时脱离挡销,并受压缩弹簧的弹性作用向内缩入引导轴大端径向固定孔内；将引导装置装配至低压涡轮轴端城墙槽后,用把手将螺杆向外旋出,挡销向外移动伸出引导销轴大端外径表面直至固定卡紧后,进行装低压涡轮转子,完成装配后把手装至螺杆孔中,再次采用把手将螺杆向内旋入分下引导装置。(The invention discloses an assembly elastic guiding device for interference assembly of a rotor cold assembly by a blind cavity structure.A guide shaft is a main structure part and is of a cavity tubular structure, the right end of the guide shaft is of a large diameter and is provided with a step, the large diameter of the guide shaft is in large radial fit with the inner control of the shaft end of a low-pressure turbine, three radial fixing holes are formed in the guide shaft, a stop pin is welded at the edge of each hole, and the left end of the guide shaft is of a tapered guiding structure; a handle is adopted to screw the screw rod inwards, the pressing mandrel moves inwards to compress the large compression spring, the mandrel is separated from the stop pin when moving inwards in a screwing way, and the mandrel is retracted into the radial fixing hole at the large end of the guide shaft inwards under the elastic action of the compression spring; after the guide device is assembled to the city wall groove at the end of the low-pressure turbine shaft, the screw rod is screwed out outwards by the handle, the stop pin moves outwards to extend out of the outer diameter surface of the large end of the guide pin shaft until being fixed and clamped, the low-pressure turbine rotor is assembled, the handle is assembled in the screw rod hole after the assembly is completed, and the handle is used for screwing the screw rod inwards and separating the guide device.)

1. The utility model provides an assembly is with blind cavity structure interference fit rotor cold charge elasticity guiding device which characterized in that: the device comprises a handle, a screw rod, a stop pin, an inner hexagonal socket head cap screw, a mandrel, a guide shaft, a stop pin, a small compression spring , a cover plate and a large compression spring;

the guide shaft is a main structure part and is of a hollow tubular structure, the right end of the guide shaft is of a large diameter and is provided with a step, the large diameter of the guide shaft is in large radial fit with the inner control of the shaft end of the low-pressure turbine, a radial fixing hole is formed in the guide shaft, a stop pin is welded on the edge of the hole, and the left end of the guide shaft is of a tapered guide structure;

the core shaft is arranged in the inner cavity of the guide shaft and can move in the guide shaft, the right end of the core shaft is of a conical structure, and the right end of the core shaft is provided with a large compression spring;

the cover plate props against the large compression spring and is screwed and fixed with the right end of the guide shaft by adopting six inner hexagonal socket head cap screws, and the cover plate presses the large compression spring;

the stop pins are arranged in the radial fixing holes in the large-diameter cavity at the right end of the guide shaft and can move radially, the large end at the inner side of the stop pins props against the tapered structure at the right end of the mandrel, and small compression springs are arranged on the stop pins which can penetrate out through the radial fixing holes in the large-diameter cavity at the right end of the guide shaft;

the left end of the screw is inserted into the guide shaft by adopting a threaded structure, and the right end of the screw props against the mandrel;

the handle is a force application device for rotating the screw rod and can be detached.

2. The assembly blind cavity structure interference fit rotor cold-assembling elastic guide device according to claim 1, characterized in that: the mandrel is arranged in the inner cavity of the assembly guide shaft and can be used as a connecting rod for assembling and fixing the shaft end and disassembling, the mandrel can move in the guide shaft, the right end of the mandrel is of a conical structure and is used for driving the guide shaft fixing connecting piece, and the right end of the mandrel is provided with a large compression spring for providing movement elasticity of the guide shaft.

3. The assembly blind cavity structure interference fit rotor cold-assembling elastic guide device according to claim 1, characterized in that: the stop pin is totally three pieces and is arranged in a radial fixing hole in a large-diameter cavity at the right end of the guide shaft, the stop pin can move radially, the large end at the inner side of the stop pin props against a conical structure at the right end of the mandrel, a small compression spring is arranged at a position close to the guide shaft, when the stop pin compresses the small compression spring, the stop pin can penetrate through the radial fixing hole in the large-diameter cavity at the right end of the guide shaft and can be clamped into a clamping ring groove at the inner side of the end of the low-pressure turbine shaft to be fixed after.

Technical Field

The invention relates to the technical field of guiding devices for engines, in particular to an elastic guiding device for interference assembly of rotors in a blind cavity structure for assembly in cold assembly.

Background

The shaft end of a low-pressure turbine rotor of an engine is of an interference assembly structure, a long shaft is in a blind assembly state when being installed in a core machine, a plurality of graphite seals and disc core parts exist in the engine, internal machine parts are easy to damage when the assembly is not centered, internal damage cannot be found, and the quality problem of the assembly process is easy to occur. According to the blind assembly guiding device for assembling the low-pressure turbine rotor, a double-spring structure is adopted, the device and the shaft end of the low-pressure turbine are quickly and firmly fixed, are assembled and guided, and are quickly disassembled, and the assembly quality and efficiency are improved.

Disclosure of Invention

In order to solve the technical problem, the cold-assembly elastic guiding device for the rotor in the assembly through the blind cavity structure interference assembly is provided, and the specific technical scheme is as follows:

a cold-assembly elastic guiding device of an interference-assembled rotor with a blind cavity structure for assembly comprises a handle, a screw rod, a stop pin, an inner hexagonal socket head screw, a mandrel, a guide shaft, a stop pin, a small compression spring , a cover plate and a large compression spring;

the guide shaft is a main structure part and is of a hollow tubular structure, the right end of the guide shaft is of a large diameter and is provided with a step, the large diameter of the guide shaft is in large radial fit with the inner control of the shaft end of the low-pressure turbine, a radial fixing hole is formed in the guide shaft, a stop pin is welded on the edge of the hole, and the left end of the guide shaft is of a tapered guide structure;

the core shaft is arranged in the inner cavity of the guide shaft and can move in the guide shaft, the right end of the core shaft is of a conical structure, and the right end of the core shaft is provided with a large compression spring;

the cover plate props against the large compression spring and is screwed and fixed with the right end of the guide shaft by adopting six inner hexagonal socket head cap screws, and the cover plate presses the large compression spring;

the stop pins are arranged in the radial fixing holes in the large-diameter cavity at the right end of the guide shaft and can move radially, the large end at the inner side of the stop pins props against the tapered structure at the right end of the mandrel, and small compression springs are arranged on the stop pins which can penetrate out through the radial fixing holes in the large-diameter cavity at the right end of the guide shaft;

the left end of the screw is inserted into the guide shaft by adopting a threaded structure, and the right end of the screw props against the mandrel;

the handle is a force application device for rotating the screw rod and can be detached.

The assembly is with blind chamber structure interference fit rotor cold packing elasticity guiding device, its preferred scheme is that installation dabber is as the connecting rod of assembly fixed axle head and decomposition usefulness in the assembly guiding axle inner chamber, can remove in the guiding axle, its right-hand member is conical structure and is used for driving guiding axle fixed connection spare, and big compression spring is installed to its right-hand member, provides the guiding axle and removes elasticity.

The assembly is with blind chamber structure interference fit rotor cold charge elasticity guiding device, its preferred scheme is that the backing pin totally three, install in the radial fixed orifices in the big footpath cavity of guiding axle right-hand member, can do radial movement, its inboard big end withstands dabber right-hand member taper structure, be close to the little compression spring of guiding axle position installation, when the backing pin compresses little compression spring, the backing pin accessible guiding axle right-hand member is worn out in the radial fixed orifices in the big footpath cavity, can block in the snap ring groove of low pressure turbine shaft end inboard after wearing out and do and fix.

The device related in the invention is used for assembling a low-pressure turbine rotor in the whole engine assembly, and by adopting the device, before the process of assembling a long shaft of the low-pressure turbine into an inner cavity of a core machine, a blind-mounted guiding device is assembled into a shaft end in advance, before invisible assembly centering is achieved, the blind-mounted guiding device penetrates through the core machine in advance and is exposed from the opposite side, so that the assembly guiding effect of the low-pressure turbine rotor shaft is achieved, the problems of inaccurate centering, easy damage to internal parts of the core machine, long assembly period and the like when the shaft end of the low-pressure turbine rotor is not assembled and guided in the original assembly scheme are solved, and the assembly process is visual and simple.

The invention has the beneficial effects that: the technical scheme is that the elastic guiding device for interference assembling of the rotor in the blind cavity structure for assembling is characterized in that a snap-in telescopic adjustment long shaft is designed aiming at the fact that the front shaft diameter of a low-pressure turbine rotor is assembled into an interference blind assembling structure and is rapidly fixed in the shaft end of the low-pressure turbine rotor, the elastic guiding device has a rapid guiding and assembling function during cold assembling, after the low-pressure turbine rotor is guided in place, a snap-in mechanism is rapidly contracted to improve the implementation efficiency of subsequent work, the long shaft is in a blind assembling state when being installed in a core machine, a plurality of graphite seals and disk core parts exist in an engine, internal parts are easily damaged when the assembly is not centered, the internal damage cannot be found, and the quality problem of the assembly process. The adoption of the process equipment improves the process method that no guide is arranged at the shaft end when the low-pressure turbine rotor is assembled, reduces the assembly period, improves the quality and the efficiency and saves the production cost of the engine.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic structural view of an elastic guiding device for cold assembly of an interference-assembled rotor with a blind cavity structure for assembly;

FIG. 3 is a right side view of the present invention;

FIG. 4 is a schematic view of a low pressure turbine rotor shaft end configuration.

In the figure, 1-handle, 2-screw, 3-stop pin, 4-hexagon socket head cap screw, 5-mandrel, 6-guide shaft, 7-stop pin, 8-small compression spring, 9-cover plate, 10-large compression spring and 11-low pressure turbine shaft end.

Detailed Description

As shown in fig. 1-4, in the technical scheme, starting from a shaft end structure of a low-pressure turbine rotor and an internal structure of a core machine of the whole machine, an inner hole cylindrical surface of a shaft end is used for radial positioning, an inner hole clamping ring groove is used for axial positioning, and a double-spring stop pin switching and pressing scheme is adopted, so that the guiding device is more convenient in the technical processes of quick assembly, firm fixation, assembly guiding and quick decomposition.

An assembly is with blind chamber structure interference fit rotor cold charge elasticity guiding device, including handle 1, threaded spindle 2, stop pin 3, hexagon socket head cap screw 4, dabber 5, guide shaft 6, backing pin 7, little compression bullet 8, apron 9, big compression spring 10;

the guide shaft 6 is a main structure part and is of a hollow tubular structure, the right end of the guide shaft is of a large diameter and is provided with a step, the large diameter of the guide shaft is in large radial fit with the inner control of the shaft end 11 of the low-pressure turbine, 3 radial fixing holes are formed in the large diameter, 1 stop pin 3 is welded on the edge of each hole, and the left end of the guide shaft is of a conical guide structure;

a core shaft 5 is arranged in the inner cavity of the guide shaft 6 and can move in the guide shaft 6, the right end of the core shaft is of a conical structure, and a large compression spring 10 is arranged at the right end of the core shaft;

the cover plate 9 props against the large compression spring 10 and is screwed and fixed with the right end of the guide shaft 6 by adopting the inner hexagonal socket head cap screws 4, the number of the inner hexagonal socket head cap screws 4 is 6, and the cover plate 9 presses the large compression spring 10;

the stop pin 7 comprises 3 pieces, is arranged in a radial fixing hole in a large-diameter cavity at the right end of the guide shaft 6 and can move radially, the large end at the inner side of the stop pin props against a tapered structure at the right end of the mandrel 5, a small compression spring 8 is arranged on the stop pin 7, and the stop pin 7 can penetrate through the radial fixing hole in the large-diameter cavity at the right end of the guide shaft 6;

the left end of the screw rod 2 is inserted into the guide shaft 6 by adopting a thread structure, and the right end of the screw rod 2 props against the mandrel 5;

the handle 1 is a force application device for rotating the screw rod 2 and can be detached.

The assembly guide shaft 6 has a cavity in which a mandrel 5 is mounted as an assembly fixing shaft end and a connecting rod for disassembly, and can move in the guide shaft 6, the right end of the assembly guide shaft is in a conical structure and used for driving a guide shaft fixing connecting piece, and the right end of the assembly guide shaft is provided with a large compression spring 10 for providing a guide shaft moving elastic force.

The stop pin 7 is totally 3 pieces, install in the radial fixed orifices in the big footpath cavity in leading axle 6 right-hand member, can do radial movement, and 5 right-hand member taper structures of dabber are withstood to its inboard big end, are close to leading axle 6 position installation little compression spring 8, and when the little compression spring 8 of stop pin 7 compression, the radial fixed orifices in the big footpath cavity in leading axle 6 right-hand member of stop pin 7 accessible were worn out, can block into after wearing out and do in the 11 inboard snap ring grooves of end of low pressure turbine axle and fix.

An operation process of the rotor cold-assembly elastic guiding device for assembly through interference assembly of a blind cavity structure comprises the following steps:

1) before the guiding device is used, the handle 1 is assembled in the force application hole of the screw rod 2, the screw rod 2 is screwed inwards by the handle 1, the screw rod 2 compresses the mandrel 5 to move inwards, the large compression spring 10 is compressed when the mandrel 5 moves, the contact surface of the mandrel 5 and the stop pin 7 is conical, the mandrel 5 is separated from the stop pin 7 when moving inwards in a screwing way, the stop pin 7 is popped inwards under the elastic action of the small compression spring 8, and the outer end positioning pin of the stop pin 7 is retracted into the large-end radial fixing hole of the guide shaft 6;

2) when the stop pin 7 is completely retracted into the hole, the guide device is assembled to the low-pressure turbine shaft end 11, and after the guide device is assembled in place, the stop pin 3 is clamped into a wall groove of the low-pressure turbine shaft end 11 to prevent circumferential rotation;

3) the screw rod 2 is screwed out by the handle 1, the screw rod 2 is separated from the mandrel 5 when the screw rod is screwed out, the large compression spring 10 at the right end of the mandrel 5 releases elasticity to push the mandrel 5 to move leftwards, the stop pin 7 is pushed to move outwards when the conical surface at the right end of the mandrel 5 moves leftwards, the stop pin 7 compresses the small compression spring, the stop pin 7 moves outwards to extend out of the outer diameter surface of the large end of the guide pin shaft 6, and the stop pin extends out of the fixing hole and then is inserted into the clamping ring groove at the shaft end 11 of the low-pressure turbine until the;

4) cooling the shaft end of the low-pressure turbine rotor, assembling the low-pressure turbine rotor with a guide device, assembling the low-pressure turbine rotor into a blind cavity of a core machine rotor through the guide device, avoiding a plurality of graphite seals and disk center parts in the cavity, connecting the low-pressure turbine rotor with a fan rear shaft center hole, and penetrating a fan shaft diameter matching surface after positioning;

5) after assembly is completed, assembling the handle 1 into a hole of the screw rod 2, screwing the screw rod 2 inwards by adopting the handle 1 again, pressing the mandrel 5 by the screw rod 2 to move inwards, compressing the large compression spring 10 when the mandrel 5 moves, separating the stop pin 7 when the conical surface of the mandrel 5 moves inwards in a screwing way, ejecting the stop pin 7 inwards under the elastic action of the small compression spring 8, retracting the outer end positioning pin of the stop pin 7 into the large end radial fixing hole of the guide shaft 6 and then separating from the ring groove of the shaft end 11 of the low-pressure turbine, and enabling the guide device to be in a non-fastening state;

6) and after the guide device is separated, the device assembly work is completed.