CN217558811U

CN217558811U - Half cover and intermediate roll of twenty-high rolling mill

Info

Publication number: CN217558811U
Application number: CN202220945221.6U
Authority: CN
Inventors: 尉强; 陈洁; 孙光红
Original assignee: Wisdri Engineering and Research Incorporation Ltd
Current assignee: Wisdri Engineering and Research Incorporation Ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2022-10-11
Anticipated expiration: 2032-04-22

Abstract

The utility model relates to a haversian sleeve, its cover body have the hole, first wear shaft hole and second and wear the shaft hole, and the pore wall of hole includes axle head restraint section and two shaft shoulder restraint sections, and axle head restraint section includes a conical surface restraint section of being connected with one of them shaft shoulder restraint section or includes two conical surface restraint sections of being connected with two shaft shoulder restraint sections respectively, and the shaft shoulder restraint section that the conical surface restraint section corresponds is from the shoulder restraint section of another shaft shoulder restraint section place side gradually expanding and is extended. In addition, the intermediate roll of the twenty-high rolling mill adopting the Harvard sleeve is also related. The cone restraining section has an axial component force pointing to the other shaft end to the acting force generated by the restrained outer wall of the cone of the shaft end, so that the close fit degree of the two shaft ends can be improved, the torque can be reliably transmitted, and the two connected shafts can be ensured to coaxially rotate at the same speed; the harbour sleeve can realize rigid synchronous connection between the first middle roller of the twenty-high rolling mill and the bearing box, friction ignition accidents cannot occur in the harbour sleeve, and the service life of the bearing in the bearing box can be remarkably prolonged.

Description

Half cover and intermediate roll of twenty-high rolling mill

Technical Field

The utility model belongs to the technical field of twenty high rolling mill, concretely relates to harbour cover and adopt this harbour middle roller of twenty high rolling mill of cover.

Background

With the continuous progress of social science and technology, the steel metallurgy industry has higher and higher requirements on strip steel products, and not only better surface quality is required, but also thinner and stronger strip steel products are required. The diameter of the working rolls is reduced as much as possible for rolling thinner strip steel, but the rigidity of the rolls is reduced due to the reduction of the diameter of the working rolls, and the problem is well solved by the twenty-high rolling mill of the tower-type roll system.

Generally, in order to solve the problem of edge thinning and control the strip shape, the first intermediate roll 1 in the twenty-high rolling mill has an axial roll shifting function, namely, the first intermediate roll 1 is driven to displace in the axial direction by an oil cylinder during rolling. The bearing boxes 2 are arranged at two ends of the first intermediate roll 1, and the connecting shafts 21 of the bearing boxes 2 are connected with the roll necks of the first intermediate roll 1 through the half sleeves 3 (shown in figure 1). Because the high-speed operation of first intermediate roll 1 during rolling, and the occasional vibration, the condition that 3 embracing of half cover tightly first intermediate roll 1 roll necks and connecting axle 21 often appears, lead to first intermediate roll 1 and connecting axle 21 to have the problem of rotation each other, that is to say first intermediate roll 1 and connecting axle 21 rotational speed are asynchronous, appear rotating speed poor, lead to 3 hole circular arcs of half cover to wear more greatly, friction spark often appears, the accident of catching fire appears even. Meanwhile, the clearance between the inner hole of the half sleeve 3 and the connecting shaft 21 is enlarged, so that the first intermediate roller 1 and the bearing box 2 are not coaxial, and the bearing box 2 is pulled by the hanging device 4, so that the bearing in the bearing box 2 is stressed unevenly, the roller is extremely easy to be stuck and burnt, or the roller neck of the first intermediate roller 1 is twisted off or the arc part of the roller neck is seriously worn, and the normal production is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a harbour cover and adopt this harbour middle roller of twenty high rolling mill of cover can solve prior art's partial defect at least.

The utility model relates to a haversian sleeve, which comprises a sleeve body, wherein the sleeve body is provided with an inner hole, a first shaft penetrating hole and a second shaft penetrating hole, the first shaft penetrating hole and the second shaft penetrating hole are respectively formed at two ends of the sleeve body and are communicated with the inner hole, the hole wall of the inner hole comprises a shaft end constraint section and two shaft shoulder constraint sections, the two shaft shoulder constraint sections are annular plane walls vertical to the axis of the first shaft penetrating hole, and the two shaft shoulder constraint sections are respectively positioned at two ends of the inner hole and are connected with the shaft penetrating hole wall at the corresponding side; the shaft end constraint section comprises a conical surface constraint section connected with one shaft shoulder constraint section or comprises two conical surface constraint sections respectively connected with the two shaft shoulder constraint sections, and the conical surface constraint sections extend gradually from the corresponding shaft shoulder constraint sections to the side where the other shaft shoulder constraint section is located.

In one embodiment, the axial end restraint section further comprises a cylindrical restraint section; when the conical surface restraining section is one, the cylindrical restraining section is connected with the conical surface restraining section and the shaft end restraining section on the other side; when the number of the conical surface restraining sections is two, the cylindrical restraining section is connected with the two conical surface restraining sections.

In one embodiment, the nominal diameter of the cylindrical restraint section is 2 to 3mm greater than the diameter of the shaft end to be restrained.

As one of the implementation modes, the sleeve body comprises two arc-shaped sleeve plates, the two arc-shaped sleeve plates can be detachably spliced and are encircled to form the inner hole, the first penetrating shaft hole and the second penetrating shaft hole.

In one embodiment, two arcuate straps are connected by a plurality of threaded fasteners.

In one embodiment, the central angles of the two arc-shaped sleeve plates are 180 °.

The utility model also relates to a middle roller of twenty-high roll mill, comprising a middle roller body and two groups of bearing boxes, wherein the bearing boxes are led out with connecting shafts, the connecting shafts are connected with the corresponding side roller necks of the middle roller body through the half sleeves in a constrained manner, and at least one of the half sleeves adopts the half sleeve as above; the conical surface restraining section is matched with the conical surface restraining section, and a conical surface outer wall is formed at the position of the corresponding shaft end.

The utility model discloses following beneficial effect has at least:

the utility model discloses in, hole pore wall to the haversian cover sets up the conical surface restriction section, its produced effort of conical surface outer wall to the axle head of retraining has the axial component of another axle head of a directional, can improve the inseparable laminating degree of two axle heads, conical surface restriction section and the epaxial conical surface outer wall of axle cooperate, can transmit the moment of torsion reliably, guarantee two connected axle coaxial rotations of same speed, avoided effectively because of the not enough various shut down overhauls, equipment trouble and the wasting of resources scheduling problem that arouses of power are held tightly to the haversian cover. When the Harvard sleeve is applied to a twenty-high rolling mill, the rigidity synchronous connection between the first middle roller and the bearing box can be reliably realized, the friction ignition accident can not occur in the Harvard sleeve, the service life of the bearing in the bearing box can be obviously prolonged, and the production efficiency of a unit is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a restraining structure of a conventional half sleeve to an intermediate roller;

fig. 2 is a schematic diagram of a restraint structure of the half sleeve to the intermediate roll provided by the embodiment of the present invention;

fig. 3 is a schematic structural diagram of the haversian sleeve provided by the embodiment of the utility model.

Detailed Description

The technical solutions in the embodiments of the present invention will be described below clearly and completely, and it should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example one

As shown in fig. 2, an embodiment of the present invention provides a haversian sleeve, which includes a sleeve body 300, wherein the sleeve body 300 has an inner hole, a first shaft penetrating hole and a second shaft penetrating hole, the first shaft penetrating hole and the second shaft penetrating hole are respectively formed at two ends of the sleeve body 300 and are both communicated with the inner hole, a hole wall of the inner hole includes a shaft end constraining section and two shaft shoulder constraining sections, the two shaft shoulder constraining sections are annular plane walls perpendicular to an axis of the first shaft penetrating hole, and the two shaft shoulder constraining sections are respectively located at two ends of the inner hole and are connected with a wall of the shaft penetrating hole at a corresponding side; the shaft end constraint section comprises a conical surface constraint section 301 connected with one shaft shoulder constraint section or comprises two conical surface constraint sections 301 respectively connected with the two shaft shoulder constraint sections, and the conical surface constraint sections 301 extend gradually from the corresponding shaft shoulder constraint sections to the side of the other shaft shoulder constraint section.

The sleeve body 300 is generally a cylindrical sleeve body 300, the first shaft penetrating hole and the second shaft penetrating hole are circular holes, and the two shaft penetrating holes are coaxial and are also coaxial with the sleeve body 300. When the haversian sleeve is applied to a twenty-high rolling mill, the roll neck of the intermediate roll 1 and the shaft neck of the connecting shaft 21 are respectively arranged in the first through shaft hole and the second through shaft hole in a penetrating way.

The sleeve body 300 can obviously be opened and closed to facilitate the shaft penetration and the shaft and sleeve body 300 maintenance and repair. As shown in fig. 3, in one embodiment, the sleeve body 300 includes two arc-shaped sleeve plates 302, the two arc-shaped sleeve plates 302 are detachably joined and enclose the inner hole, the first through-hole and the second through-hole; wherein, preferably, the central angles corresponding to the two arc-shaped sleeve plates 302 are both 175-180 degrees; the two arcuate straps 302 are connected by a plurality of threaded fasteners, which may be screws, bolts, or the like. In actual manufacturing, a sleeve can be manufactured in a full circle, and then the middle of the sleeve is cut open to form two arc-shaped sleeve plates 302, and further, the butt joint surfaces of the two arc-shaped sleeve plates 302 are respectively ground by 1-2 mm.

The diameter of the inner hole is larger than the diameters of the first shaft-penetrating hole and the second shaft-penetrating hole, and understandably, the diameter of the inner ring of the shaft shoulder restraining section is the same as the diameter of the inner side hole of the corresponding side shaft-penetrating hole, and the diameter of the small-diameter end of the conical surface restraining section 301 is the same as the diameter of the outer ring of the corresponding shaft shoulder restraining section.

The half sleeve mainly plays a role of a coupler and is mainly used for coaxially connecting two shafts, the shaft ends of the two shafts are accommodated in the inner hole, the shaft shoulders at the two shaft ends are respectively attached and restrained by the two shaft shoulder restraining sections, and the outer ring walls of the two shaft ends are attached and restrained by the shaft end restraining sections.

In this embodiment, the conical surface restraining section 301 is arranged to have an axial component force pointing to the other shaft end to the acting force generated by the conical surface outer wall on the restrained shaft end, so that the close fitting degree of the two shaft ends can be improved, the conical surface restraining section 301 is matched with the conical surface outer wall on the shaft end, so that the torque can be reliably transmitted, the two connected shafts can be ensured to coaxially rotate at the same speed, and the problems of various machine halt maintenance, equipment failure, resource waste and the like caused by insufficient holding force of the half sleeve are effectively solved.

In this embodiment, as shown in fig. 2, the shaft end constraining section includes two conical surface constraining sections 301, which has a better constraining effect, can also obtain a better torque transmission effect, and can realize automatic centering between two shafts and improve the rotational speed uniformity between two shafts.

Further preferably, as shown in fig. 2, the axial end restraining section further comprises a cylindrical restraining section; when one conical surface restraining section 301 is provided, the cylindrical restraining section is connected with the conical surface restraining section 301 and the shaft end restraining section on the other side; when there are two conical surface constraining sections 301, the cylindrical constraining section connects the two conical surface constraining sections 301. In one embodiment, the nominal diameter of the cylindrical restraint section is 2-3 mm greater than the diameter of the shaft end to be restrained.

Example two

As shown in fig. 2, an embodiment of the present invention provides an intermediate roll 1 of a twenty-high rolling mill, including an intermediate roll 1 roll body and two sets of bearing boxes 2, wherein a connecting shaft 21 is led out from the bearing boxes 2, the connecting shaft 21 is connected with a roll neck at a corresponding side of the intermediate roll 1 roll body through a haversian sleeve in a constrained manner, and at least one of the haversian sleeves adopts the haversian sleeve provided in the first embodiment; and a conical outer wall is formed at the corresponding shaft end and is matched with the conical restraining section 301.

Preferably, the shaft end of the connecting shaft 21 and the roll neck of the roll body of the intermediate roll 1 are both processed to form conical outer walls, and the haversian sleeve correspondingly has two conical restraining sections 301.

Preferably, the haversian sleeves on both sides are the haversian sleeves provided in the first embodiment.

The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a haversian cover, includes the cover body, the cover body has hole, first shaft hole and the second of wearing to wear the shaft hole, first wear the shaft hole with the second is worn the shaft hole and is formed respectively in the both ends of the cover body and all with hole intercommunication, its characterized in that: the hole wall of the inner hole comprises a shaft end restraining section and two shaft shoulder restraining sections, the two shaft shoulder restraining sections are both annular plane walls perpendicular to the axis of the first shaft penetrating hole, and the two shaft shoulder restraining sections are respectively positioned at two ends of the inner hole and connected with the hole wall of the shaft penetrating hole on the corresponding side; the shaft end constraint section comprises a conical surface constraint section connected with one shaft shoulder constraint section or comprises two conical surface constraint sections respectively connected with the two shaft shoulder constraint sections, and the conical surface constraint sections extend gradually from the corresponding shaft shoulder constraint sections to the side where the other shaft shoulder constraint section is located.

2. The harbour sleeve of claim 1, wherein: the shaft end restraint section also comprises a cylindrical restraint section; when the conical surface restraining section is one, the cylindrical restraining section is connected with the conical surface restraining section and the shaft end restraining section on the other side; when the number of the conical surface restraining sections is two, the cylindrical restraining section is connected with the two conical surface restraining sections.

3. The harbour sleeve of claim 2, wherein: the nominal diameter of the cylindrical restraint section is 2-3 mm larger than the diameter of the shaft end to be restrained.

4. The harvard jacket of claim 1, wherein: the cover body includes two arc lagging, and two arc lagging can be dismantled the concatenation and enclose to establish and be formed with the hole first wear the shaft hole with the shaft hole is worn to the second.

5. The harvard jacket of claim 4, wherein: the two arc-shaped sleeve plates are connected through a plurality of threaded fasteners.

6. The harbour sleeve of claim 4, wherein: the central angles corresponding to the two arc-shaped sleeve plates are all 180 degrees.

7. The utility model provides a twenty high rolling mill's middle roller, includes middle roller roll body and two sets of bearing box, the connecting axle has been drawn forth to the bearing box, the connecting axle with the corresponding side roll neck of middle roller roll body is connected its characterized in that through the restraint of haversian cover: at least one of the harbour jackets adopts the harbour jacket as claimed in any one of the claims 1 to 6; the conical surface restraining section is matched with the conical surface restraining section, and a conical surface outer wall is formed at the position of the corresponding shaft end.