SU1625652A1 - Method of assembly by pressing parts of shaft-bush type - Google Patents

Abstract

The invention relates to the assembly and disassembly of pressure connections using high pressure working medium. supplied to the interface of the parts to create a wedging oil layer between the contact surfaces of the parts. The essence of the method is to pre-assemble the assembled parts in the cylinder body 2 with the formation of a cavity between the rod 5, the side walls of the body 2 and the end of the sleeve 1, aligning the ends of the sleeve 1 and the shaft with the formation of an annular cavity between the side surface of the shaft and the walls of the cover 3. After that pressure from one source into both cavities, as a result of which parts are assembled. 1 il.

Description

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The invention relates to the field of assembling and disassembling compounds with a tension using high devping of the working medium supplied to the interface to create a splitting oil interlayer between the contact surfaces of the parts.

The purpose of the invention is to improve the quality of pressing by increasing the strength of the joint.

The drawing shows a device for implementing the method

A sleeve 1 is placed in the device, which is to be pressed. The case 2 hydrocylinders and the cover 3 have the ability to move relative to the mating axis 4 and the guide rod 5 when the working fluid is pumped through the fitting 6. Morning cavities of the morning cavities are provided by means of seals 7 and gaskets 8. The device contains a discharge valve 9, a spacer bushing 10 with seals 11 and supports 12

The pressing of the cylinder bushings onto the smooth axles is performed as follows. The sleeve 1 is fixed in the housing 2 on the gaskets 8 using the cover 3, having previously installed a spacer sleeve 10 for supplying high pressure oil from the inlet end of the pressed-in sleeve. The matching axis 4 is pushed into the opening of the cover 3 to / at the end of the sleeve 1 The other end of the axis is rigidly fixed to the support 12. Similarly, the protruding part of the guide rod 5B is fixed to the resulting closed cavity of the power cylinder through the fitting 6: two-side oil injection, the pressure of which exceeds the contact pressure compression on mating surfaces. The pressure of the working fluid increases the internal diameter of the pressed sleeve and, at the same time, together with the housing 2, slides over the oil gap on the axle 4

The method is carried out with the formation of a non-wedge-shaped one. a roughly uniform thickness of the oil layer between the contacting surfaces along the entire length of the mating due to the redistribution

Hydroenvironmental pressure in defrosting ring gap. It is known that the concentration of the specific pressure along the edges of the sleeve pressed on the shaft (when the axis length exceeds the shaft length) can be 1.2-1.7 times the pressure in the middle part of the fit, depending on the shape of the female part (hub). the oil at the ends of the hub should be no less than 1.2 times the pressure of the hydraulic medium in the middle of the deformed annular gap in conjunction. This helps to align the annular gap filled with oil between the contacting surfaces if the pressure is g and the medium in the gap exceeds the contact compression caused by the landing of the Tang so that a two-sided oil supply improves the hydraulic distribution conditions in the contact zone of the surfaces of the mating parts and improves the strength of the hydraulic press plantings. The pressure of the working fluid used is 1.5-1.7 times lower than at one side feed from the end of the interface, which reduces the risk of premature shear of the sleeve pressed onto the axis (shaft) until a sufficient amount of lubricant penetrates to ensure hydraulic distribution in the contact zone.

Claims (1)

Claims assembly method by pressing in parts of a shaft-bushing type, comprising mounting the assembled parts in a hydraulic cylinder body, the protruding part of the stem of which is fixed, aligning the ends of the sleeve and the shaft assembled with it, fixing the opposite shaft end, forcing the working medium into the hydraulic cylinder cavity between the body walls the stem and the end of the sleeve, characterized in that, in order to improve the quality of the pressing by increasing the strength of the connection, the working medium is additionally injected into the ring hydraulic cavity of the cylinder between the walls of the housing and the side surface of the shaft, with scrap, the flow of the working medium in both breaks leads from one source