CN105108448A

CN105108448A - Method for disassembling large part pin shaft connection

Info

Publication number: CN105108448A
Application number: CN201510631233.6A
Authority: CN
Inventors: 阴法亮; 吕霞; 王文; 李绪东; 宋程文; 梁玉萍; 林雅琴
Original assignee: Laiwu Iron and Steel Group Co Ltd
Current assignee: Laiwu Iron and Steel Group Co Ltd
Priority date: 2015-09-29
Filing date: 2015-09-29
Publication date: 2015-12-02

Abstract

The invention relates to the technical field of maintaining mechanical equipment, and provides a method for disassembling large part pin shaft connection. The method includes the following steps that a pin shaft is heated to expand; heating is stopped, and the pin shaft is cooled to normal temperature; a pin hole of a shaft base is heated, and the pin shaft is jacked and pressed out of the pin hole by a jack. As the pin shaft is heated, the gap between the pin shaft and the pin hole becomes smaller, the expanded pin shaft is used for squeezing impurities such as dust and oil dirt, the original filling state of the impurities in the gap between the pin shaft and the pin hole is destroyed, then the pin shaft is cooled, the gap between the pin shaft and the pin hole becomes larger, the match tightness is reduced by heating the pin hole, and the pin shaft is jacked out of the pin hole by the jack. When the method is used for disassembling large part pin shaft connection, pressure borne by the jack is small, and the disassembling process is safer.

Description

A kind of method dismantling heavy parts pinned connection

Technical field

The present invention relates to machinery maintenance technical field, particularly relate to a kind of method dismantling heavy parts pinned connection.

Background technology

The application of pinned connection in plant equipment is comparatively general, at present, the method of dismounting heavy parts pinned connection is generally ejected from pin-and-hole by bearing pin with jack, but, in the heavy industry such as iron and steel, because production environment is severe, usually the foreign material such as dust and greasy dirt can be had in the gap of bearing pin and pin-and-hole, the pressure that foreign material in these gaps can make jack bear increases hundreds of kilogram suddenly, strengthen the use danger coefficient of jack, the safety of workman and plant equipment is constituted a threat to, therefore, dismantle heavy parts pinned connection how saferly and become those skilled in the art's technical problem urgently to be resolved hurrily.

Summary of the invention

In view of this, the invention provides a kind of method dismantling heavy parts pinned connection, when using the method dismounting heavy parts pinned connection, the pressure that jack bears is less, and unloading process is safer.

In order to achieve the above object, the invention provides following technical scheme:

Dismantle a method for heavy parts pinned connection, comprise the following steps:

A, heating bearing pin, make described bearing pin expand;

B, stopping heating, cool described bearing pin to normal temperature;

The pin-and-hole position of C, heating axle bed, presses described bearing pin with jack top, described bearing pin is ejected described pin-and-hole.

Preferably, in the above-mentioned methods, the mode that bearing pin adopts electrical heating or eddy-current heating is heated in steps A.

Preferably, in the above-mentioned methods, draft type is adopted to assist bearing pin described in accelerating cooling in step B.

Preferably, in the above-mentioned methods, the pin-and-hole position of heating axle bed in step C adopts the mode of electrical heating or eddy-current heating.

In the method for dismounting heavy parts pinned connection provided by the invention, first by heating bearing pin, bearing pin is expanded, gap smaller between bearing pin and pin-and-hole, the foreign material such as bearing pin extruding dust and greasy dirt etc. of expansion, then cool bearing pin, gap between bearing pin and pin-and-hole becomes again large, finally heat the pin-and-hole position of axle bed, and with jack top pad axle, bearing pin is ejected pin-and-hole.As can be seen here, the present invention passes through the squeeze and destroy original occupied state of the foreign material such as dust and greasy dirt, and meanwhile, reduced the tightness coordinated by heating pin-and-hole position when jack top pad axle, therefore, the pressure that jack bears is less, and unloading process is safer.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.

Fig. 1 is a kind of flow chart dismantling the method for heavy parts pinned connection provided by the invention;

Fig. 2 is the schematic diagram of the heavy parts pinned connection that the embodiment of the present invention one is dismantled;

Fig. 3 ~ Fig. 6 is the state change schematic diagram of the medium-and-large-sized part of the embodiment of the present invention one unloading process.

Be labeled as in figure:

1, bearing pin; 2, axle bed; 3, connected piece; 4, gap foreign material.

Detailed description of the invention

For the ease of understanding, below in conjunction with accompanying drawing, the invention will be further described.

A kind of flow chart dismantling the method for heavy parts pinned connection provided by the invention see Fig. 1 ~ Fig. 6, Fig. 1; Fig. 2 is the schematic diagram of the heavy parts pinned connection that the embodiment of the present invention one is dismantled; Fig. 3 ~ Fig. 6 is the state change schematic diagram of the medium-and-large-sized part of the embodiment of the present invention one unloading process.

A kind of method dismantling heavy parts pinned connection provided by the invention comprises the following steps:

S1, heating bearing pin, make described bearing pin expand.

See Fig. 2 and Fig. 3, in the present embodiment, connected piece 3 is connected by bearing pin 1 with axle bed 2, and at the gap Nei You gap foreign material 4 of bearing pin 1 with pin-and-hole, the original occupied state of gap foreign material 4 as shown in Figure 3.

See Fig. 3 and Fig. 4, heating bearing pin 1, bearing pin 1 is expanded, and the gap between bearing pin 1 and pin-and-hole will diminish, the bearing pin 1 top clearance foreign material 4 of expansion, destroy the original occupied state of gap foreign material 4.

In specific implementation process, the mode such as electrical heating or eddy-current heating can be adopted to heat bearing pin 1.

S2, stopping heating, cool described bearing pin to normal temperature.

See Fig. 5, cooling bearing pin 1, bearing pin 1 will shrink, and the gap between bearing pin 1 and pin-and-hole becomes again large.

In specific implementation process, draft type can be adopted to assist accelerating cooling bearing pin 1, " normal temperature " refers to 20 DEG C ~ 25 DEG C.

The pin-and-hole position of S3, heating axle bed, presses described bearing pin with jack top, described bearing pin is ejected described pin-and-hole.

See Fig. 6, pin-and-hole can be made to expand by the pin-and-hole position of heating axle bed 2, thus the tightness that reduction pin-and-hole coordinates with bearing pin 1, the pressure born during the pad axle 1 of jack top is less, and unloading process is safer.

In specific implementation process, the mode such as electrical heating or eddy-current heating can be adopted to heat the pin-and-hole position of axle bed 2.

As can be seen from above-described embodiment, in the method for dismounting heavy parts pinned connection provided by the invention, first by heating bearing pin 1, bearing pin 1 is expanded, the gap smaller between bearing pin 1 and pin-and-hole, the bearing pin 1 top clearance foreign material 4 expanded, then cool bearing pin 1, the gap between bearing pin 1 and pin-and-hole becomes again large, finally heats the pin-and-hole position of axle bed 2, and with jack top pad axle 1, bearing pin 1 is ejected pin-and-hole.

The present invention is by heating bearing pin 1, utilize the bearing pin 1 top clearance foreign material 4 expanded, destroy gap foreign material 4 in bearing pin 1 and the original occupied state in the gap of pin-and-hole, and, pin-and-hole position when jack top pad axle 1 by heating axle bed 2 reduces the tightness of cooperation, therefore, the pressure that jack bears is less, and unloading process is safer.

To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of embodiment, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to embodiment illustrated herein, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims

1. dismantle a method for heavy parts pinned connection, it is characterized in that, comprise the following steps:

A, heating bearing pin, make described bearing pin expand;

B, stopping heating, cool described bearing pin to normal temperature;

2. method according to claim 1, is characterized in that, heats the mode that bearing pin adopts electrical heating or eddy-current heating in steps A.

3. method according to claim 2, is characterized in that, adopts draft type to assist bearing pin described in accelerating cooling in step B.

4. method according to claim 3, is characterized in that, the pin-and-hole position of heating axle bed in step C adopts the mode of electrical heating or eddy-current heating.