CN216199465U - Shaft head seal of roller oil cylinder of cold rolling mill - Google Patents
Shaft head seal of roller oil cylinder of cold rolling mill Download PDFInfo
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- CN216199465U CN216199465U CN202122693842.8U CN202122693842U CN216199465U CN 216199465 U CN216199465 U CN 216199465U CN 202122693842 U CN202122693842 U CN 202122693842U CN 216199465 U CN216199465 U CN 216199465U
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Abstract
The utility model discloses a shaft head seal of a bending roller oil cylinder of a cold rolling mill, and mainly relates to a sealing structure. Comprises an annular pre-tightening cover and a V-shaped sealing ring which are sleeved on a shaft head of a bending roller piston rod; the annular pre-tightening cover is arranged on a pre-tightening thread groove of the shaft head end cover of the bending roller oil cylinder in a threaded connection mode, and the V-shaped sealing ring is located in a sealing groove below the pre-tightening thread groove; and the bottom flange of the annular pre-tightening cover presses the top of the V-shaped sealing ring to keep the V-shaped sealing ring tightly attached to the outer surface of the shaft head of the bending roller piston rod. The utility model has the beneficial effects that: the automatic compensation device mainly solves the problems of adjustment of the bending force of the working roll and abrasion of the sealing and guide rings after the stability of a roll system of the roll is reduced, realizes automatic compensation of abrasion loss of the sealing and guide rings when the working roll is not easy to perceive and irregularly swings in the rolling process of a piston rod of a bending roll cylinder, prevents external pollutants from invading a hydraulic system to cause hydraulic system faults, and prolongs the service life of a servo valve.
Description
Technical Field
The utility model relates to a sealing structure, in particular to a shaft head seal of a bending roller oil cylinder of a cold rolling mill.
Background
The strip steel is also called steel strip, and is a narrow and long steel plate produced by various steel rolling enterprises in order to meet the requirements of different industrial departments on producing various metal or mechanical products, the width is within 1300mm, the strip steel is generally supplied in coils, and the length is slightly different according to the size of each coil. In order to ensure that the steel strip obtains good plate shape in the rolling process of the steel strip, a modern steel strip rolling mill is provided with four groups of sixteen sets of working roll positive and negative bending roll oil cylinders and eight groups of sixteen sets of intermediate roll positive bending rolls, and the working roll bending is the most important means for ensuring the plate shape in the rolling process. The bending oil cylinder is in the core area of the whole rolling equipment, the environment temperature is high, the iron powder impurities are more, the working environment of continuous washing of rolling liquid is very severe, an inlet piece is generally adopted for shaft sealing of the bending oil cylinder of the existing rolling mill, the price is high, the replacement is troublesome, the maintenance cost is high, and the production is influenced. The seal is easy to damage, and the damaged seal pollutes a hydraulic system to cause the servo valve to fail.
The shaft sealing system of the bending oil cylinder of the rolling mill of the original design is shown in the attached figure 4 of the specification. The system uses the working roll bending control plate type in the rolling process, because the bending oil cylinder rod is in a continuous working state when the thickness of the edge of a rolled piece changes, the bending oil cylinder rod is not easy to be perceived along with the adjustment of the bending force of the working roll and the stability reduction and sealing of a roll system, and the abrasion of a guide ring causes the appearance of the bending oil cylinder rod in the rolling process, irregular radial swinging causes the sealing, the service life of the guide ring is accelerated, the maintenance cost is increased, the production operation time is influenced, in addition, because the dustproof guide adopted by the original design is an integrated phenolic material, the hardness is higher, an axial gap is required to be left in the manufacturing process for later-stage installation, and a 'back door' is remained for the entering of pollutants invisibly. And the service life of the bending roller servo valve is greatly reduced along with the aggravation of oil pollution of a bending roller system. The integrated phenolic plastics cannot automatically compensate after aging and abrasion and can only be replaced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a sealing of a bending roller oil cylinder shaft head of a cold rolling mill, which mainly solves the problems of sealing and guide ring abrasion after the bending roller force of a working roller is adjusted and the stability of a roller system is reduced, realizes the automatic compensation of the abrasion amount of the sealing and the guide ring when a piston rod of the bending roller cylinder is not easy to perceive and irregularly swings in the rolling process, adopts the integral design without a back door for all sealing parts, can easily realize the leakage prevention, reduce the maintenance difficulty, reduce the maintenance cost, improve the production operation time, realize the localization of the sealing parts, prevent the hydraulic system fault caused by the invasion of external pollutants into the hydraulic system and prolong the service life of a servo valve by only increasing the sealing pretightening force after the leakage.
In order to achieve the purpose, the utility model is realized by the following technical scheme:
a kind of cold-rolling mill roll bending cylinder spindle nose is sealed, including covering the ring-shaped pre-tightening cover and V-arrangement seal ring on the piston rod spindle nose of the roll bending; the annular pre-tightening cover is arranged on a pre-tightening thread groove of the shaft head end cover of the bending roller oil cylinder in a threaded connection mode, and the V-shaped sealing ring is located in a sealing groove below the pre-tightening thread groove; and the bottom flange of the annular pre-tightening cover presses the top of the V-shaped sealing ring to keep the V-shaped sealing ring tightly attached to the outer surface of the shaft head of the bending roller piston rod.
And a dustproof pad is arranged at the bottom of the pre-tightening thread groove.
The dustproof pad is a cross-shaped sealing ring.
The top of the annular pre-tightening cover is fixedly provided with a dustproof ring in a limiting mode, and the dustproof ring is tightly attached to the outer surface of a shaft head of a piston rod of the bending roller.
And a connecting hole is formed in the top of the annular pre-tightening cover.
And 2-6 limiting jacks are arranged on the shaft head end cover of the bending roller oil cylinder in an annular array.
The bottom of the V-shaped sealing ring is provided with a second-stage sealing ring groove, a YX-shaped sealing ring for a shaft is arranged in the second-stage sealing ring groove, and the YX-shaped sealing ring for the shaft is tightly attached to the outer surface of the shaft head of the bending roller piston rod.
Compared with the prior art, the utility model has the beneficial effects that:
1. this scheme adopts V-arrangement sealing washer to add dustproof pad and adds three combination seal forms of axle YX type sealing washer can effectively solve sealed ageing and reveal the problem. If the V-shaped sealing ring leaks in the use process, the special spanner can be used for rotating the annular pre-tightening cover to adjust the compression strength to obtain a better sealing effect and prevent leakage. The V-shaped sealing ring does not need to be replaced until the V-shaped sealing ring does not have the pre-tightening amount. This scheme has little input on original scheme basis, easily realize, low cost, replace advantages such as import, mainly solve the adjustment of work roll bending force and roll system stability decline back sealed, the wearing and tearing of guide ring, realize that difficult the perception appears in the roll bending cylinder piston rod rolling process, irregularly when swaing to sealed, the automatic compensation of guide ring wearing and tearing volume, and all sealing members all adopt the global design not have "back door", only need increase sealed pretightning force after revealing and just can easily realize the leak protection, reduce the maintenance degree of difficulty, reduce cost of maintenance, improve the production activity duration, realize that the sealing member is localized, prevent that external pollutant from invading hydraulic system and causing hydraulic system trouble, extension servovalve life.
2. The cross sealing ring is arranged at the bottom of the pre-tightening thread groove, so that pollutants entering from the threaded connection part or leakage are blocked, and dust prevention and leakage prevention are realized more thoroughly.
Drawings
Fig. 1 is a schematic structural view of a ring-shaped pre-tightening cap screwed by using a special wrench.
Figure 2 is a top view of the present invention.
Fig. 3 is a schematic view of the internal structure of the present invention.
FIG. 4 is a shaft seal system diagram of a roll bending cylinder of a rolling mill of a prior design.
Reference numerals shown in the drawings:
1. a shaft head of a bending roller piston rod; 2. an annular pre-tightening cover; 3. a V-shaped seal ring; 4. a spindle head end cover; 5. pre-tightening the thread groove; 6. a sealing groove; 7. a bottom flange; 8. a dust-proof pad; 9. a dust ring; 10. connecting holes; 11. limiting the jacks; 12. a secondary seal ring groove; 13. a YX-shaped seal ring for a shaft; 14. a special spanner; 15. a bolt; 16. a strip-shaped groove; 17. and a limiting pin.
Detailed Description
The utility model will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.
The utility model relates to a cold rolling mill roll bending oil cylinder shaft head seal, as shown in figure 3 of the attached drawing of the specification, the main structure comprises an annular pre-tightening cover 2 and a V-shaped sealing ring 3 which are sleeved on a roll bending piston rod shaft head 1; the annular pre-tightening cover 2 is arranged on a pre-tightening thread groove 5 of a shaft head end cover 4 of the roller oil cylinder in a threaded connection mode, and the V-shaped sealing ring 3 is located in a sealing groove 6 below the pre-tightening thread groove 5; and the flange 7 at the bottom of the annular pre-tightening cover 2 presses and holds the top of the V-shaped sealing ring 3 to keep the V-shaped sealing ring 3 to be tightly attached to the outer surface of the shaft head 1 of the bending roller piston rod. If the V-shaped sealing ring 3 encounters leakage in the using process, the special wrench 14 can be used for rotating the annular pre-tightening cover 2 to adjust the compression strength to obtain better sealing effect and prevent leakage, generally speaking, the V-shaped sealing ring 3 is rotated 90 degrees or 180 degrees each time in practice, namely, the V-shaped sealing ring 3 is pressed downwards by 1/4 screw pitches or half screw pitch distance. The V-shaped sealing ring 3 needs to be replaced until no pre-tightening amount exists, and generally speaking, when the annular pre-tightening cover 2 is screwed for two circles, namely the V-shaped sealing ring 3 is pressed downwards for the distance of two screw pitches, the V-shaped sealing ring 3 is replaced in order to ensure the sealing effect. When in replacement, the annular pre-tightening cover 2 is screwed out, and then the V-shaped sealing ring 3 can be replaced conveniently.
The V-shaped sealing rings 3 are sealing elements with V-shaped sections, the sealing elements are quite wide in application, a plurality of V-shaped sealing rings 3 are combined, installed and used, particularly suitable for severe working conditions such as high pressure, large diameter, high rotating speed and long stroke, can work normally under severe conditions, are long in service life, can be optimally combined to adapt to height and various applications, can work well even under poor surface quality, can allow certain eccentric load and eccentric motion due to characteristic determination, and have excellent sealing effect.
And a dustproof pad 8 is arranged at the bottom of the pre-tightening thread groove 5. The dustproof pad 8 is a cross-shaped sealing ring. The cross sealing ring is used for blocking pollutants entering from the threaded connection or leakage, so that dust prevention and leakage prevention are realized more thoroughly.
The top of the annular pre-tightening cover 2 is fixedly provided with a dustproof ring 9 in a limiting mode, and the dustproof ring 9 is tightly attached to the outer surface of the shaft head 1 of the piston rod of the bending roller. The dust ring 9 can prevent pollutants from entering from the outer surface of the shaft head 1 of the bending roller piston rod.
The top of the annular pre-tightening cover 2 is provided with a connecting hole 10. The connecting hole 10 is used for connecting and fixing with a special spanner 14, as shown in the attached figure 1 of the specification, the connecting hole 10 is provided as a threaded hole, and the special spanner 14 is fixed on the annular pre-tightening cover 2 through a bolt 15. As shown in the attached drawing fig. 1 of the specification, when the wrench is screwed to drive the annular pre-tightening cover 2 to rotate and the annular pre-tightening cover 2 is screwed into the pre-tightening thread groove 5 to rotate, the bottom flange 7 of the annular pre-tightening cover 2 can press and press the V-shaped sealing ring 3 to adjust the pressing strength, so that a better sealing effect is obtained and leakage is prevented. The cross sealing washer is soft rubber circle elastic deformation ability, and annular pretension lid 2 rotates when compressing tightly, can be pressed the deformation and play the fine setting effect, the sealed effect of realization cross sealing washer that also can be better.
Annular array is equipped with 2 ~ 6 spacing jacks 11 on the bending roller hydro-cylinder spindle nose end cover 4, is equipped with 4 in this embodiment. Screwing the spanner and driving the annular pre-tightening cover 2 to rotate, and rotating corresponding angles (90 degrees, 180 degrees, 270 degrees and 360 degrees) to determine, as shown in the attached drawing figure 1 of the specification, when the strip-shaped groove 16 on the special spanner 14 is aligned with the limiting jack 11, the limiting pin 17 penetrates through the limiting jack 11 to be inserted, so that the annular pre-tightening cover 2 is prevented from being loosened due to machine vibration, and then the special spanner 14 is driven to loosen, so that the V-shaped sealing ring 3 is not tightly pressed and leakage occurs.
The bottom of the V-shaped sealing ring 3 is provided with a secondary sealing ring groove 12, a shaft YX-shaped sealing ring 13 is arranged in the secondary sealing ring groove 12, and the shaft YX-shaped sealing ring 13 is tightly attached to the outer surface of the shaft head 1 of the bending roller piston rod. The provision of the shaft YX seal ring 13 can further provide a sealing effect. The YX-shaped sealing ring 13 for the shaft can be well used for sealing a piston rod in the reciprocating hydraulic oil cylinder.
In conclusion, the scheme adopts three combined sealing forms of the V-shaped sealing ring 3, the dustproof pad 8 and the YX-shaped sealing ring 13 for the shaft, so that the problems of sealing aging and leakage can be effectively solved. If the V-shaped sealing ring 3 leaks in the using process, the special spanner 14 can be used for rotating the annular pre-tightening cover 2 to adjust the compression strength to obtain a better sealing effect and prevent leakage. The V-shaped sealing ring 3 does not need to be replaced until the sealing is free from pre-tightening amount. This scheme has little input on original scheme basis, easily realize, low cost, replace advantages such as import, mainly solve the adjustment of work roll bending force and roll system stability decline back sealed, the wearing and tearing of guide ring, realize that difficult the perception appears in the roll bending cylinder piston rod rolling process, irregularly when swaing to sealed, the automatic compensation of guide ring wearing and tearing volume, and all sealing members all adopt the global design not have "back door", only need increase sealed pretightning force after revealing and just can easily realize the leak protection, reduce the maintenance degree of difficulty, reduce cost of maintenance, improve the production activity duration, realize that the sealing member is localized, prevent that external pollutant from invading hydraulic system and causing hydraulic system trouble, extension servovalve life.
Claims (7)
1. The utility model provides a cold rolling mill roll bending hydro-cylinder spindle nose is sealed which characterized in that: comprises an annular pre-tightening cover (2) and a V-shaped sealing ring (3) which are sleeved on a shaft head (1) of a bending roller piston rod;
the annular pre-tightening cover (2) is arranged on a pre-tightening thread groove (5) of the end cover (4) of the shaft head of the bending roller oil cylinder in a threaded connection way,
the V-shaped sealing ring (3) is positioned in a sealing groove (6) below the pre-tightening thread groove (5); and a flange (7) at the bottom of the annular pre-tightening cover (2) presses and holds the top of the V-shaped sealing ring (3) to keep the V-shaped sealing ring (3) tightly attached to the outer surface of the shaft head (1) of the bending roller piston rod.
2. The cold rolling mill roll bending oil cylinder shaft head seal according to claim 1, characterized in that: and a dustproof pad (8) is arranged at the bottom of the pre-tightening thread groove (5).
3. The cold rolling mill roll bending oil cylinder shaft head seal according to claim 2, characterized in that: the dustproof pad (8) is a cross-shaped sealing ring.
4. The roll bending oil cylinder shaft head seal of the cold rolling mill according to any one of claims 1 to 3, characterized in that: the top of the annular pre-tightening cover (2) is fixedly provided with a dustproof ring (9) in a limiting mode, and the dustproof ring (9) is tightly attached to the outer surface of the shaft head (1) of the piston rod of the bending roller.
5. The seal for the shaft head of the roll bending oil cylinder of the cold rolling mill according to claim 4, is characterized in that: the top of the annular pre-tightening cover (2) is provided with a connecting hole (10).
6. The cold rolling mill roll bending oil cylinder shaft head seal according to claim 5, characterized in that: an annular array is arranged on the end cover (4) of the shaft head of the bending roller oil cylinder and is provided with 2-6 limiting insertion holes (11).
7. The seal for the shaft head of the roll bending oil cylinder of the cold rolling mill according to claim 6, is characterized in that: the bottom of the V-shaped sealing ring (3) is provided with a secondary sealing ring groove (12), a shaft YX-shaped sealing ring (13) is arranged in the secondary sealing ring groove (12), and the shaft YX-shaped sealing ring (13) is tightly attached to the outer surface of the shaft head (1) of the bending roller piston rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122693842.8U CN216199465U (en) | 2021-11-05 | 2021-11-05 | Shaft head seal of roller oil cylinder of cold rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122693842.8U CN216199465U (en) | 2021-11-05 | 2021-11-05 | Shaft head seal of roller oil cylinder of cold rolling mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216199465U true CN216199465U (en) | 2022-04-05 |
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ID=80902973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122693842.8U Active CN216199465U (en) | 2021-11-05 | 2021-11-05 | Shaft head seal of roller oil cylinder of cold rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216199465U (en) |
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2021
- 2021-11-05 CN CN202122693842.8U patent/CN216199465U/en active Active
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