CN202834064U - Sealing device for channeling roll hydraulic cylinder - Google Patents
Sealing device for channeling roll hydraulic cylinder Download PDFInfo
- Publication number
- CN202834064U CN202834064U CN 201220372331 CN201220372331U CN202834064U CN 202834064 U CN202834064 U CN 202834064U CN 201220372331 CN201220372331 CN 201220372331 CN 201220372331 U CN201220372331 U CN 201220372331U CN 202834064 U CN202834064 U CN 202834064U
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- end cap
- seals
- hydraulic cylinder
- sealing
- sealing device
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Abstract
The utility model relates to a sealing device for a channeling roll hydraulic cylinder and belongs to the technical field of strip rolling equipment. The sealing device is used for preventing an end cap seal on a connecting rod side of the channeling roll hydraulic cylinder from being frequently damaged. The sealing device adopts the technical scheme that seals and sealing supports are mounted on the inner side and the outer side of an inner end cap sleeve respectively; the seals are in trapezoidal structures; the sealing supports are located on the left sides and the right sides of the seals respectively; a threaded through hole is formed in an end cap; a positioning ejector pin is screwed in the threaded through hole; and the front end of the positioning ejector pin is contacted with the inner end cap sleeve. According to the sealing device, as the seals adopt the unique trapezoidal structures, the seals have higher pressure resistance and abrasion resistance in a deformation process after being stressed; the sealing supports at the seals are extruded by external forces to reduce the abrasion speeds of seal bodies when the seals conduct axial endplay; the positioning ejector pin rotates by threads to push against the inner end cap sleeve to avoid rotary motion generated between the inner end cap sleeve and the end cap due to the impact of hydraulic oil, so that the abrasion of the seal on the outer side of the inner end cap sleeve is reduced; and the service lives of the seals are prolonged.
Description
Technical field
The utility model relates to a kind of roll shifting hydraulic cylinder sealing device in the cold-rolling process, belongs to the board rolling equipment technical field.
Background technique
In cold rolled sheet is rolling, can produce certain angle, i.e. rolling angle of nip on the surface of contact of operation roll of mill and strip.The yielding resistance that produces during strip distortion when overcoming mill milling needs milling train to produce the enough power of depressing.For reducing rolling load, in the cold rolling production with mill rolls subcenter arranged offset to increase the frictional force between intermediate roll and the work roll, work roll, intermediate roll are offset to strengthen the stability that roller is work by roll centre, and such arrangement of roller system causes at the certain biasing force of whole work roll meeting generation.For example, in the cold rolling production of certain enterprise, work roll diameter is 526mm, intermediate roll diameter 634mm, and roll centre skew is 3mm, calculates the biasing force that produces on the whole work roll and is about 170KN by setting up the trigonometric function model analysis like this.Because the biasing force effect that work roll bears often causes the generation of roll shifting oil hydraulic cylinder oil accident.This has affected the normal production of production line greatly.For obtaining rational template curve, roll shifting will drive intermediate roll and carry out continuous vibration adjustment, and the lateral force that work roll bears will finally act on the roll shifting oil hydraulic cylinder by the bearing transmission, thereby cause the end bracket enclosed frequent breakage of roll shifting hydraulic cylinder connecting rod side.
By analysis, discovery causes the reason of the end bracket enclosed frequent breakage of roll shifting hydraulic cylinder connecting rod side that following several respects are arranged:
1, end cap inner sleeve design of Sealing Structure is unreasonable, and common O type circle is sealed in yielding wearing and tearing when being subject to the external force extruding;
2, after hydraulic oil enters rod chamber, can produce the rotational impact effect to the end cap inner sleeve.Thereby cause producing a certain amount of relative rotary motion between thread bush inwall and the end cap inner sleeve, aggravated to put in the end cap wearing and tearing of sealing;
3, when oil hydraulic cylinder is subject to the larger impulsive load of vertical direction, because hydraulic cylinder base fixes, can not swing after causing it stressed, the side-thrust that final oil hydraulic cylinder bears is passed to cylinder end caps sealing place fully, thereby has aggravated the wearing and tearing of sealing.
The model utility content
Technical problem to be solved in the utility model provides a kind of roll shifting hydraulic cylinder sealing device that has good withstand voltage and wear-resisting property, reduces the rate of wear of sealing.
The technological scheme that solves the problems of the technologies described above is:
A kind of roll shifting hydraulic cylinder sealing device, it comprises outer wall of cylinder block, end cap, end cap inner sleeve and gland, its improvements are that sealing and sealed support are installed respectively in the medial and lateral of end cap inner sleeve, be sealed into trapezium structure, sealed support lays respectively at the sealing left and right sides.
Above-mentioned roll shifting hydraulic cylinder sealing device is processed with tapped through hole on the described end cap, is rotary with the location ejector pin in the tapped through hole, and the front end of location ejector pin contacts with the end cap inner sleeve.
Above-mentioned roll shifting hydraulic cylinder sealing device, the width in the connecting bolt hole of described hydraulic cylinder base is greater than the diameter of connecting bolt.
The beneficial effects of the utility model are:
Sealing of the present utility model is designed to unique trapezium structure, has stronger withstand voltage, wear-resisting property in stressed rear deformation process, and sealed support is subject to the external force extruding in sealing place and causes being sealed in the rate of wear of slowing down seal body when axially carrying out play; The location ejector pin reaches holding out against the end cap inner sleeve by screw thread rotation, the effect that holds out against by the location ejector pin, avoided making rotatablely moving of producing between end cap inner sleeve and the end cap because of the hydraulic oil percussion, thereby reach the wearing and tearing that reduce the outer side sealing of end cap inner sleeve, prolonged the working life of sealing; Widen the bolt of lower base hole of fixer cylinder pressure, can slow down side-thrust to the impact of hydraulic cylinder body.The utility model easy accessibility, easily processing, cheap have reached the purpose in the working life that has prolonged oil hydraulic cylinder.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is mounting point of the present utility model schematic diagram.
Mark is as follows among the figure: outer wall of cylinder block 1, end cap 2, end cap inner sleeve 3, gland 4, location ejector pin 5, sealed support 6, sealing 7, seal groove 8.
Embodiment
Show among the figure, end cap inner sleeve 3 relies on end cap 2 to carry out axially locating, and end cap 2 outsides are processed with outside thread and cylinder body 1 screw-internal thread fit is installed the location.In use find because hydraulic cylinder body bears lateral thrust, cause serious final damage of O type circle sealed extruded in the former design, the analysis found that it mainly is the most serious near lateral wearing in the cylinder bar that the part of wearing and tearing is concentrated in sealing.
The utility model is widened seal groove 8 for strengthening wear-resisting, the withstand voltage properties of sealing, in end cap inner sleeve 3 inside and outside both sides sealed support 6 and sealing 7 has been installed respectively.
Sealing 7 is in order to cut off connecting rod side hydraulic oil, and new sealing 7 is unique trapezium structure design, makes itself can bear stronger pressure.
Simultaneously after seal groove 8 is widened, respectively increase a sealed support 6 in sealing about 7, the effect of sealed support 6 is to be subject to external force extruding in sealing place to cause sealing 7 slow down the rate of wear of seal body when axially carrying out play, and then reaches the purpose in the working life that has prolonged oil hydraulic cylinder.
Show among the figure, by analyzing rear discovery, rod chamber internal pressure oil rotational impact in the oil hydraulic cylinder makes and produces rotatablely moving of circumferencial direction between end cap inner sleeve 3 and the end cap 2, and this circumferential relative movement will cause the wearing and tearing aggravation of the inside and outside sealing of end cap inner sleeve 3.
The utility model is for eliminating the circumferential movement between end cap 2 and the end cap inner sleeve 3; the machining screw through hole is used for installing location ejector pin 5 on end cap 2; precession by location ejector pin 5 makes it hold out against end cap inner sleeve 3; thereby guarantee that end cap inner sleeve 3 is fixing; effectively eliminated and produced rotatablely moving of circumferencial direction between end cap inner sleeve 3 and the end cap 2; finally reach 3 sealings of protection end cap inner sleeve, prolong the oil hydraulic cylinder purpose in working life.
The utility model is suitably widened the connecting bolt hole of hydraulic cylinder base for reducing the side-thrust that is passed on the hydraulic cylinder body.By such improvement, when the roll shifting system works, side-thrust is passed to base-oil hydraulic cylinder gudgeon joint, can reduce side-thrust to the impact of hydraulic cylinder body by the suitable skew of connecting bolt.And then reach the rate of wear that reduces end bracket enclosed, the purpose that has prolonged the working life of oil hydraulic cylinder.
Claims (3)
1. roll shifting hydraulic cylinder sealing device, it comprises outer wall of cylinder block (1), end cap (2), end cap inner sleeve (3) and gland (4), it is characterized in that: sealing (7) and sealed support (6) are installed respectively in the medial and lateral of end cap inner sleeve (3), sealing (7) is trapezium structure, and sealed support (6) lays respectively at sealing (7) left and right sides.
2. roll shifting hydraulic cylinder sealing device according to claim 1, it is characterized in that: described end cap is processed with tapped through hole on (2), is rotary with location ejector pin (5) in the tapped through hole, and the front end of location ejector pin (5) contacts with end cap inner sleeve (3).
3. roll shifting hydraulic cylinder sealing device according to claim 2, it is characterized in that: the width in the connecting bolt hole of described hydraulic cylinder base is greater than the diameter of connecting bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220372331 CN202834064U (en) | 2012-07-30 | 2012-07-30 | Sealing device for channeling roll hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220372331 CN202834064U (en) | 2012-07-30 | 2012-07-30 | Sealing device for channeling roll hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202834064U true CN202834064U (en) | 2013-03-27 |
Family
ID=47945773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220372331 Expired - Fee Related CN202834064U (en) | 2012-07-30 | 2012-07-30 | Sealing device for channeling roll hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202834064U (en) |
-
2012
- 2012-07-30 CN CN 201220372331 patent/CN202834064U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20150730 |
|
| EXPY | Termination of patent right or utility model |