Dismounting device for double shaft sleeves of civil aircraft oil combustion part

Abstract

The invention discloses a dismounting device for double shaft sleeves of a civil aircraft oil combustion part. The dismounting device comprises a fixing support, a jacking device and two sets of pullers; the fixing support is provided with a top plate and a bottom plate, and the top plate is provided with a lifting mechanism; the jacking device comprises a panel, the middle of the panel is provided with a threaded rod through hole matched with the lower end of a threaded rod, through holes symmetrically formed in the two sides of the threaded rod through hole, and two lifting bolts are assembled in the through holes, wherein the diameter of the bolt heads of the lifting bolts is larger than that of the through holes for the lifting bolts; each puller comprises a circular pipe and a jacking rod, wherein a threaded hole serves as an inner hole formed in the upper end of the circular pipe, the pipe wall of the lower end of the circular pipe is evenly provided with a plurality of axial long gaps, a tapered opening serves as a hole opening of an inner hole formed in the lower end of the circular pipe, a rolling ball of which the diameter is larger than that of the small end of the tapered opening is assembled in the tapered opening, the lower end of the jacking rod penetrates into the inner hole of the circular pipe to abut against the rolling ball, the upper end of the jacking rod is provided with an outer threaded in a lathing mode, the outer thread is matched with the threaded hole formed in the upper end of the circular pipe, the topmost end of the jacking rod is provided with an axial threaded hole which is in thread fit with the corresponding lifting bolt, and the outer surface of the jacking rod is provided with knurls convenient for hand screwing. According to the dismounting device, the double shaft sleeves of the civil aircraft oil combustion part can be dismounted on the condition that a shell is not collided and scraped and shell and shaft sleeve damage is not caused.

Description

technical field [0001] The invention relates to a dismantling device for a shaft sleeve, in particular to a dismantling device for a double shaft sleeve of a fuel oil component of a civil aircraft. Background technique [0002] The fuel components of civil aircraft use gear pumps to pressurize the fuel. When the gear pump rotates through a pair of gears, the volume of the meshing space changes, thereby pressurizing the fuel. Because it directly affects the fuel boosting efficiency, the civil aircraft gear pump has high requirements for the clearance between the meshing gears, so the civil aircraft fuel components mostly adopt the double-shaft sleeve method (such as figure 1 ) to fix the gear to reduce the radial runout of the gear. [0003] see figure 2 , This kind of double shaft sleeve is fixed by pin connection, so it needs to be removed at the same time when disassembling; in practice, the matching gap between the double shaft sleeve and the housing cavity is small, g...

AI Technical Summary

Problems solved by technology

If the force on the two bushings is uneven during disassembly, it will cause inclination, which will scratch the casing and cause damage to the casing and bushings; the disassembly of the double bushings has always been a difficult point in the maintenance of fuel components

[0004] The disassembly of the shaft sleeve in the prior art is mostly carried out by pushing or pulling from the end face of the shaft sleeve, but sometimes the structure is limited, and the disassembly device cannot reach the end face of the shaft sleeve; sometimes the sleeve is too thin to be used in Drill threaded holes on the end face of the shaft sleeve, screw in the screw and then pull the screw to remove the shaft sleeve

It is more difficult that the double bushings are to be dismantled in parallel

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