CN219755327U - Piston structure and supporting roller balance cylinder device - Google Patents

Abstract

The utility model belongs to the technical field of support roll leveling, and particularly relates to a piston structure and a support roll balance cylinder device, wherein the piston structure comprises a piston hole, a piston rod, a guide sleeve and an oil injection cavity, the piston hole is arranged on a lower support roll bearing box, the piston hole comprises an upper threaded hole and a lower unthreaded hole, the unthreaded hole comprises a first unthreaded hole and a second unthreaded hole, and the first unthreaded hole is smaller than the threaded hole in diameter and larger than the second unthreaded hole in diameter; the piston rod is arranged in the piston hole, a gap is reserved between the middle part of the piston rod and the second light hole wall, and the lower part of the piston rod is in close contact with the second light hole wall; the middle upper part of the outer side of the guide sleeve is fixedly connected with the wall of the threaded hole, the lower part of the outer side is in close contact with the wall of the first unthreaded hole, and the inner side is in close contact with the upper part of the piston rod; the oiling cavity is communicated with the lower part of the second unthreaded hole, and an oiling hole is formed in the oiling cavity. The utility model reduces the abrasion to the lower supporting roller bearing box and prolongs the service life of the lower supporting roller bearing box.

Description

Piston structure and supporting roller balance cylinder device

Technical Field

The utility model belongs to the technical field of supporting roller leveling, and particularly relates to a piston structure and a supporting roller balance cylinder device.

Background

As shown in fig. 1, 2 and 3, currently, the mill often uses four piston structures mounted on the bearing housing of the lower support roller to balance the upper support roller, so as to realize that the upper support roller is parallel to the lower support roller. The working principle is as follows: hydraulic oil with certain pressure enters through the oil filling hole at the bottom of the piston hole, the piston rod performs lifting movement under the action of the hydraulic oil, and the heights of four corners of the upper supporting roller are regulated, so that the balance of the upper supporting roller is realized; when the hydraulic oil pressure is canceled, the hydraulic oil is pressed out of the oil filling hole through the dead weight of the upper supporting roller, and the upper supporting roller falls back to the initial state.

As shown in fig. 4, in the conventional piston structure, after long-time lifting and lowering use, the piston rod is deformed, so that friction between the piston rod and the piston hole is increased, and the piston hole is deformed, so that oil leakage, pressure shortage and the like occur. The above problems can be solved by enlarging the piston bore and remanufacturing the piston rod, but after a period of use, the above problems still occur. In this way, when the size of the piston hole is enlarged to a limit, the bearing box can only be scrapped, and the bearing box can be manufactured again. During the process, reaming is needed to be carried out on the piston hole of the bearing box for each repair, and the piston rod is manufactured again, so that time and labor are wasted; and the bearing box has long processing period and high price, so that the mode has a plurality of defects in actual production.

Disclosure of Invention

The utility model aims to solve the problems and the shortcomings, and provides a piston structure and a supporting roller balance cylinder device, which reduce abrasion to a lower supporting roller bearing box and prolong the service life of the lower supporting roller bearing box.

In order to achieve the above purpose, the technical scheme adopted is as follows:

the present utility model provides a piston structure comprising:

a piston hole which is arranged on the lower supporting roller bearing box, wherein the piston hole comprises an upper threaded hole and a lower optical hole, the optical hole comprises a first optical hole and a second optical hole, and the first optical hole is smaller than the aperture of the threaded hole and larger than the aperture of the second optical hole;

the piston rod is arranged in the piston hole, a gap is reserved between the middle part of the piston rod and the second light hole wall, and the lower part of the piston rod is in close contact with the second light hole wall;

the middle upper part of the outer side of the guide sleeve is fixedly connected with the wall of the threaded hole, the lower part of the outer side is in close contact with the wall of the first unthreaded hole, and the inner side is in close contact with the upper part of the piston rod; and

and the oil injection cavity is communicated with and arranged below the second unthreaded hole, and an oil injection hole is formed in the oil injection cavity.

Further, an exhaust hole is formed in the lower support roller bearing box in a penetrating mode, and the exhaust hole is communicated with the gap.

Further, a guide belt and a Y-shaped ring are arranged at the lower part of the piston rod along the circumference, and the guide belt is positioned above the Y-shaped ring; the lower part of the piston rod is closely contacted with the second unthreaded hole wall through a guide belt and a Y-shaped ring.

Further, the guide sleeve is in the shape of a hollow cylinder with the outer diameter of the upper part being larger than that of the lower part.

Further, the device also comprises a dust ring which is embedded in the upper part of the guide sleeve along the circumference and is tightly attached to the piston rod.

Further, the guide sleeve also comprises an O-shaped ring which is embedded in the lower part of the guide sleeve along the circumference and is tightly attached to the first light hole wall.

Further, the guide sleeve is made of copper, and the piston rod is made of 45# steel.

The utility model also provides a supporting roller balancing cylinder device, which comprises:

the two lower supporting roller bearing boxes are rotationally connected with the left end and the right end of the lower supporting roller;

four piston structures as described above, which are arranged two by two on two lower support roller bearing boxes; and

and the two upper support roller bearing boxes are rotatably connected with the left end and the right end of the upper support roller, are correspondingly arranged up and down with the two lower support roller bearing boxes, and are positioned right above the two piston structures.

Further, each two piston structures are arranged on the lower supporting roller bearing box at one side of the piston structures.

By adopting the technical scheme, the beneficial effects are that:

1. the novel piston structure changes the friction between the original piston rod and the piston hole of the lower support roller bearing box into the friction between the piston rod and the guide sleeve, thereby reducing the abrasion to the lower support roller bearing box and prolonging the service life of the lower support roller bearing box.

2. The utility model adopts the dustproof ring to increase the tightness between the guide sleeve and the piston rod; the sealing performance of the bearing box and the guide sleeve of the lower supporting roller is improved by adopting an O-shaped ring; the dust-proof ring and the O-shaped ring can prevent dust from entering a gap between the piston rod and the second unthreaded hole wall to prevent the piston rod from moving; the piston rod and the oiling cavity are effectively sealed by adopting a Y-shaped ring and a guide belt.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the following description will briefly explain the drawings of the embodiments of the present utility model. Wherein the showings are for the purpose of illustrating some embodiments of the utility model only and not for the purpose of limiting the same.

FIG. 1 is a front view of a prior art backing roll balance cylinder apparatus;

FIG. 2 is a side view of a prior art backing roll balance cylinder apparatus;

FIG. 3 is a cross-sectional view of section A-A of FIG. 1;

FIG. 4 is a cross-sectional view of section D-D of FIG. 3;

fig. 5 is a schematic diagram of a piston structure according to an embodiment of the present utility model.

The meaning represented by the numbers in the figures is:

1. the device comprises a lower support roller bearing box, a threaded hole, a first light hole, a second light hole, a piston rod, a guide sleeve, an oil injection cavity, an oil injection hole, an exhaust hole, a guide belt, an 11. Y-shaped ring, a dust ring, a 13. O-shaped ring, a lower support roller, an upper support roller and an upper support roller bearing box.

Detailed Description

An exemplary embodiment of the present utility model will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the utility model are shown. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art.

In the description of the present utility model, it should be understood that the expressions "first" and "second" are used to describe various elements of the present utility model and do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.

It should be noted that when an element is referred to as being "connected," "coupled," or "connected" to another element, it can be directly connected, coupled, or connected, but it is understood that there may be intervening elements present therebetween; i.e. the positional relationship of direct connection and indirect connection is covered.

It should be noted that the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items.

It should be noted that terms like "upper," "lower," "left," "right," and the like, which indicate an orientation or a positional relationship, are merely used to indicate a relative positional relationship, and are provided for convenience in describing the present utility model, and do not necessarily refer to devices or elements having a particular orientation, being constructed and operated in a particular orientation; when the absolute position of the object to be described is changed, the relative positional relationship may be changed accordingly.

As shown in fig. 5, the piston structure of the present embodiment includes a piston hole, a piston rod 5, a guide sleeve 6, and an oil injection chamber 7; the piston hole sets up on lower backing roll bearing box 1, and the piston hole includes the screw hole 2 and the unthreaded hole of lower part on upper portion, and the unthreaded hole includes first unthreaded hole 3 and second unthreaded hole 4, and the aperture of first unthreaded hole 3 is less than the aperture of screw hole 2, and is greater than the aperture of second unthreaded hole 4, and in this embodiment, the aperture of screw hole 2 is 100mm, and the hole depth is 45mm, and the aperture of first unthreaded hole 3 is 90mm, and the hole depth is 25mm, and the aperture of second unthreaded hole 4 is 75mm, and the hole depth is 350mm. The piston rod 5 is arranged in the piston hole, a gap is reserved between the middle part of the piston rod 5 and the wall of the second light hole 4, and the width of the gap is 2.5mm; the lower part of the piston rod 5 is in intimate contact with the wall of the second pupil 4. The middle upper part of the outer side of the guide sleeve 6 is fixedly connected with the wall of the threaded hole 2, the lower part of the outer side is closely contacted with the wall of the first unthreaded hole 3, and the inner side is closely contacted with the upper part of the piston rod 5; the oil injection cavity 7 is communicated with and arranged below the second unthreaded hole 4, an oil injection hole 8 is formed in the oil injection cavity 7, and hydraulic oil is conveyed into the oil injection cavity 7 through the oil injection hole 8.

The upper part of the lower supporting roller bearing box 1 is provided with an exhaust hole 9 in a penetrating way, the exhaust hole 9 is communicated with the gap, and air in the gap is exhausted, so that the piston rod 5 can smoothly ascend and descend.

Two grooves are formed in the lower portion of the piston rod 5 up and down, a guide belt 10 is filled in the groove at the upper portion, the guide belt 10 can be a phenolic cloth clamping guide belt, a reverse Y-shaped ring 11 is filled in the groove at the lower portion, and the guide belt 10 and the Y-shaped ring 11 are tightly attached to the wall of the second light hole 4. The piston rod 5 and the oiling cavity 7 are sealed by adopting a Y-shaped ring 11 and a guide belt 10.

Preferably, the guide sleeve 6 is in a hollow cylinder shape, the outer diameter of the upper part of the hollow cylinder is larger than that of the lower part of the hollow cylinder, a dust-proof ring 12 is embedded in the upper part of the guide sleeve 6 along the circumference, the dust-proof ring 12 is tightly attached to the piston rod 5, and the tightness between the guide sleeve 6 and the piston rod 5 is improved; an O-shaped ring 13 is embedded in the circumference of the lower part of the guide sleeve 6, the O-shaped ring 13 is tightly attached to the wall of the first unthreaded hole 3, and the tightness of the lower supporting roller bearing box 1 and the guide sleeve 6 is improved; the use of the dust ring 12 and the O-ring 13 prevents dust from entering the gap between the piston rod 5 and the wall of the second light hole 4 to hinder the movement of the piston rod 5.

Preferably, the guide sleeve 6 is made of copper, and the piston rod 5 is made of 45# steel.

The guide sleeve 6 of the embodiment is connected to the lower support roller bearing box 1 through threads, the piston rod 5 moves up and down in the guide sleeve 6, and the novel piston structure changes the friction between the original piston rod 5 and a piston hole of the lower support roller bearing box 1 into the friction between the piston rod 5 and the guide sleeve 6, so that the abrasion to the lower support roller bearing box 1 is reduced, and the service life of the lower support roller bearing box 1 is prolonged; when the guide sleeve 6 is seriously worn, only the guide sleeve 6 needs to be replaced, so that the maintenance is simple and convenient, and the maintenance cost is greatly reduced.

The embodiment also provides a supporting roller balancing cylinder device which comprises two lower supporting roller bearing boxes 1, four piston structures and two upper supporting roller bearing boxes 16; a lower support roller 14 is rotatably arranged between the two lower support roller bearing boxes 1, two piston structures are arranged on one side of the lower support roller bearing box 1 front and back, and the other two piston structures are arranged on the other side of the lower support roller bearing box 1 front and back; an upper support roller 15 is rotatably arranged between the two upper support roller bearing boxes 16, the two upper support roller bearing boxes 16 are arranged up and down correspondingly to the two lower support roller bearing boxes 1, and each upper support roller bearing box 16 is positioned right above the two piston structures.

The present example achieves the balancing of the upper support roller 15 by adjusting the lifting of the four piston rods 5 on the lower support roller bearing housing 1.

Preferred embodiments for carrying out the utility model have been described in detail hereinabove, but it should be understood that these embodiments are merely illustrative and are not intended to limit the scope, applicability or configuration of the utility model in any way. The scope of the utility model is defined by the appended claims and equivalents thereof. Many modifications and variations of the foregoing embodiments will be apparent to those of ordinary skill in the art in light of the teachings of this utility model, which will fall within the scope of this utility model.

Claims (9)

1. A piston structure, comprising:

a piston hole which is arranged on the lower supporting roller bearing box, wherein the piston hole comprises an upper threaded hole and a lower optical hole, the optical hole comprises a first optical hole and a second optical hole, and the first optical hole is smaller than the aperture of the threaded hole and larger than the aperture of the second optical hole;

the piston rod is arranged in the piston hole, a gap is reserved between the middle part of the piston rod and the second light hole wall, and the lower part of the piston rod is in close contact with the second light hole wall;

the middle upper part of the outer side of the guide sleeve is fixedly connected with the wall of the threaded hole, the lower part of the outer side is in close contact with the wall of the first unthreaded hole, and the inner side is in close contact with the upper part of the piston rod; and

and the oil injection cavity is communicated with and arranged below the second unthreaded hole, and an oil injection hole is formed in the oil injection cavity.

2. The piston structure of claim 1 wherein said lower back-up roller bearing housing is provided with a vent therethrough, said vent being in communication with said gap.

3. The piston structure of claim 1, wherein a guide band and a Y-ring are circumferentially provided at a lower portion of the piston rod, and the guide band is located above the Y-ring; the lower part of the piston rod is closely contacted with the second unthreaded hole wall through a guide belt and a Y-shaped ring.

4. The piston structure of claim 1 wherein said guide sleeve is in the shape of a hollow cylinder having an upper outer diameter greater than a lower outer diameter.

5. The piston structure of claim 4, further comprising a dust ring circumferentially embedded in an upper portion of the guide sleeve and closely attached to the piston rod.

6. The piston structure of claim 4 further comprising an O-ring circumferentially embedded in the lower portion of the guide sleeve and abutting the first bore wall.

7. The piston structure of claim 1 wherein said guide sleeve is copper and said piston rod is 45# steel.

8. A backing roll balancing cylinder apparatus, comprising:

the two lower supporting roller bearing boxes are rotationally connected with the left end and the right end of the lower supporting roller;

four piston structures according to any one of claims 1-7, which are arranged two by two on two lower support roller bearing housings; and

and the two upper support roller bearing boxes are rotatably connected with the left end and the right end of the upper support roller, are correspondingly arranged up and down with the two lower support roller bearing boxes, and are positioned right above the two piston structures.

9. The support roller balancing cylinder apparatus of claim 8 wherein each two piston structures are disposed on one of the lower support roller bearing housings in tandem.