Bearing bush and shaft sleeve assembly for roller shaft of hot galvanizing unit

Abstract

The invention relates to the technical field of continuous hot galvanizing process equipment, in particular to a hot galvanizing unit roll shaft bearing bush and shaft sleeve assembly which comprises a sink roll, a shaft sleeve, a bearing bush, a bearing seat, a roll arm, an ejector rod and an ejector rod bearing. Zinc liquid is prevented from entering the space between the shaft sleeve and the bearing bush to erode the shaft sleeve, the bearing bush and the bearing seat, the bearing bush is conveniently mounted through the clamping sleeve, the joint body and the external thread ring, the shaft sleeve and the bearing bush with convexity improve the abrasion resistance of the shaft sleeve and reduce the abrasion of the bearing bush and the shaft sleeve, and the contact state of the roller and the roller path is improved to reduce the friction loss; and the friction force of the shaft sleeve is further reduced by using the lubricant, the Cr-Ni alloy and the cobalt chromium tungsten carbide, so that the maintenance cost of the bearing bush and the shaft sleeve is reduced, and the working stability of a roller system is improved.

Description

Technical Field

[0001] The invention relates to the technical field of continuous hot-dip galvanizing process equipment, in particular to a roller bearing bushing sleeve assembly of a hot-dip galvanizing unit. Background Art

[0002] In a continuous hot-dip galvanizing production line, the steel strip needs to be rolled by the continuous rotation of the zinc pot roller so that a coating of a certain weight or thickness is formed on the surface of the steel strip. Generally, the zinc pot roller is installed through the axial hole of the frame support arm of the hot-dip galvanizing equipment, and a bushing and a bearing are arranged between the axial hole and the roller to support the zinc pot roller immersed in the zinc pot.

[0003] At present, the Chinese invention with application number 202010345304.7 discloses a sleeve and bearing seat device suitable for continuous hot-dip galvanizing process production. Although the wedge-shaped structure on the radial direction of the bearing seat body allows the solid zinc slag entering the bearing friction surface to be quickly discharged to reduce particle wear, the following problems still exist:

[0004] During the continuous hot-dip galvanizing production process, the sleeve and bearing assembly are easily worn or even damaged due to the combined effects of zinc liquid erosion and rotational wear. Therefore, the continuous hot-dip galvanizing production must be stopped regularly to change rollers. Frequent shutdowns and roller changes will affect production efficiency, increase production costs and increase the labor intensity of workers. Summary of the invention

[0005] The technical problem to be solved by the present invention is that in the continuous hot-dip galvanizing production process, the sleeve and bearing bush components are easily worn or even damaged on their surfaces due to the combined effects of zinc liquid erosion and rotational wear.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a hot-dip galvanizing unit roller shaft bearing sleeve assembly, which includes a sinking roller, a sleeve, a bearing, a bearing seat, a roller arm, a push rod and a push rod bearing, the two ends of the sinking roller are fixedly connected to the sleeve, the bearing is fixedly connected to the inner wall of the bearing seat, the sleeve is rotatably connected to the bearing, the bearing seat is fixedly connected to the roller arm, the push rod is fixedly connected to the roller arm, the push rod bearing is threadedly connected to the push rod, and the push rod bearing abuts the sleeve.

[0007] As a preferred solution of the roller shaft bearing sleeve assembly of the hot-dip galvanizing unit described in the present invention, the sinking roller includes a roller body, two roller flanges and two roller shafts, the roller body is a cylindrical structure, the two roller flanges are respectively fixedly connected to the two ends of the roller body, the two roller shafts are respectively fixedly connected to the two roller flanges, and the roller shaft is coaxially arranged with the roller body.

[0008] As a preferred solution of the hot-dip galvanizing unit roller shaft bearing sleeve assembly described in the present invention, it also includes a conical sealing plug, the bearing seat is provided with a through cavity, and axial holes are opened at both ends of the bearing seat, one end of the through cavity is conical, and the conical section of the through cavity is provided with a conical sealing plug that cooperates with the axial hole.

[0009] As a preferred solution of the hot-dip galvanizing unit roller shaft bearing sleeve assembly described in the present invention, the bearing seat includes a sleeve, a joint body and an external threaded ring, the external threaded ring is threadedly connected to the sleeve, the joint body is meshedly connected to the sleeve and the external threaded ring, the end of the bearing is provided with a mounting hole, and the outer surface of the bearing 3 is provided with a groove that matches the joint body.

[0010] As a preferred solution of the hot-dip galvanizing unit roller shaft bearing sleeve assembly described in the present invention, it also includes a spring, and two through grooves are opened at one end of the bearing shell perpendicular to the bearing seat, one end of the spring is fixedly connected to the bottom end of the through groove, and the other end of the spring abuts against the conical sealing plug.

[0011] As a preferred solution of the hot-dip galvanizing unit roller shaft bearing sleeve assembly described in the present invention, it also includes a roller, the bearing is provided with a trapezoidal outer ring, the sleeve is provided with a trapezoidal inner ring, and the trapezoidal outer ring and the trapezoidal inner ring are slidably connected by the roller.

[0012] As a preferred solution of the hot-dip galvanizing unit roller shaft bearing sleeve assembly described in the present invention, it also includes a raceway sealing block, a lubricant and connecting screws, the trapezoidal inner ring is provided with a notch, the raceway sealing block matches the notch, the raceway sealing block is fastened together with the notched trapezoidal inner ring through the connecting screws to form a complete trapezoidal raceway, and the raceway is provided with a lubricant.

[0013] As a preferred solution of the hot-dip galvanizing unit roller bearing bushing sleeve assembly described in the present invention, the push rod bearing is provided with a groove matching the end of the sleeve.

[0014] As a preferred solution of the hot-dip galvanizing unit roller shaft bearing sleeve assembly described in the present invention, the sleeve, bearing and bearing seat are made of Cr-Ni alloy, and the roller is made of cobalt-chromium tungsten carbide.

[0015] As a preferred solution of the hot-dip galvanizing unit roller bearing bushing sleeve assembly described in the present invention, a welding surface is partially provided on the outer surface of the bearing seat, and the welding surface is serrated in shape.

[0016] Beneficial effects of the present invention: The present invention uses a push rod and a push rod bearing to axially limit the sinking roller, and uses a conical sealing plug and a spring as a sealing member to prevent zinc liquid from entering between the sleeve and the bearing shell, thereby corroding the sleeve, the bearing shell and the bearing seat.

[0017] The convex sleeve and bearing shell can improve the wear resistance of the sleeve and reduce the wear of the bearing shell and sleeve. The contact state between the roller and the raceway can be improved to reduce friction loss and improve the anti-skew ability of the bearing. The roller can be quickly installed and disassembled through screws and raceway sealing blocks. The bearing shell can be easily installed through the ferrule, joint body and external threaded ring. The bearing seat can be welded to the roller arm conveniently through the welding surface. The friction of the sleeve can be further reduced by using lubricant 23, Cr-Ni alloy and cobalt-chromium tungsten carbide, thereby reducing the maintenance cost of the bearing shell and sleeve and improving the stability of the roller system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall cross-sectional view of a roller bearing bushing assembly of a hot-dip galvanizing unit in an embodiment of the present disclosure;

[0019] Figure 2 It is a schematic diagram of a trapezoidal outer ring of a roller bearing bushing assembly of a hot-dip galvanizing unit in an embodiment of the present disclosure;

[0020] Figure 3 It is a schematic diagram of the overall structure of a roller bearing bushing assembly of a hot-dip galvanizing unit in an embodiment of the present disclosure;

[0021] Figure 4 It is a schematic diagram of a mandrel bearing of a roller bearing bushing assembly of a hot-dip galvanizing unit in an embodiment of the present disclosure;

[0022] Figure 5 It is a schematic diagram of the bearing seat structure of a roller bearing bushing sleeve assembly of a hot-dip galvanizing unit in an embodiment of the present disclosure;

[0023] Figure 6 It is a schematic diagram of an explosion of a bearing seat of a roller bearing sleeve assembly of a hot-dip galvanizing unit in an embodiment of the present disclosure.

[0024] Reference numerals: sinking roller 1; roller body 101; roller flange 102; two roller shafts 103; sleeve 2; trapezoidal inner ring 21; blocking block 22; lubricant 23; connecting screw 24; notch 221; raceway 222; bearing bush 3; through groove 31; trapezoidal outer ring 32; spring 33; mounting hole 34; groove 35 ； Bearing seat 4; through cavity 41; shaft hole 42; conical sealing plug 43; welding surface 47; ferrule 44, joint body 45; threaded ring 46 ； Roller arm 5; push rod 6; push rod bearing 7; groove 71; roller 8. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] Example 1

[0027] Reference Figure 1-Figure 6 This embodiment provides a roller shaft bearing bushing sleeve assembly of a hot-dip galvanizing unit, comprising a sinking roller 1, a sleeve 2, a bearing bushing 3, a bearing seat 4, a roller arm 5, a push rod 6 and a push rod bearing 7, wherein both ends of the sinking roller 1 are fixedly connected to the sleeve 2, the bearing bushing 3 is fixedly connected to the inner wall of the bearing seat 4, the sleeve 2 is rotatably connected to the bearing bushing 3, the bearing seat 4 is fixedly connected to the roller arm 5, the push rod 6 is fixedly connected to the roller arm 5, the push rod bearing 7 is threadedly connected to the push rod 6, and the push rod bearing 7 abuts the sleeve 2.

[0028] In the preferred embodiment of the present invention, the sleeve 2 rotates synchronously with the sinking roller 1, the bearing shell 3 is fixed relative to the bearing seat 4, the bearing seat 4 supports the cooperation between the bearing shell 3 and the sleeve 2, and the push rod 6 is used to axially limit the sleeve 2 by adjusting the axial clearance between the thrust push rod bearing 5 and the sleeve 2, so as to prevent the sleeve 2 from moving relative to the bearing shell 3 along the same straight line.

[0029] Reference Figure 1 The sinking roller 1 includes a roller body 101, two roller flanges 102 and two roller shafts 103. The roller body 101 is a cylindrical structure. The two roller flanges 102 are respectively fixedly connected to the two ends of the roller body 101. The two roller shafts 103 are respectively fixedly connected to the two roller flanges 102. The roller shafts 103 are coaxially arranged with the roller body 101.

[0030] In this embodiment, the preferably rotating sinking roller 1 is installed on the roller arm 5 through the shaft sleeves 2 and the bearing seat 4 on both sides.

[0031] Reference Figure 3 , and also includes a conical sealing plug 43. The bearing seat 4 is provided with a through cavity 41, and shaft holes 42 are opened at both ends of the bearing seat 4. One end of the through cavity 41 is conical, and the conical section of the through cavity 41 is provided with a conical sealing plug 43 that cooperates with the shaft hole 42.

[0032] Preferably, in this embodiment, the conical sealing plug 43 can prevent the zinc liquid from entering the gap between the bearing shell and the sleeve.

[0033] Reference Figure 3 , and also includes a spring 32. The bearing shell 3 is perpendicular to one end of the bearing seat 4 and has two through grooves 31. One end of the spring 32 is fixedly connected to the bottom end of the through groove 31, and the other end of the spring 32 abuts against the conical sealing plug 43.

[0034] In this embodiment, the elastic force of the spring 32 is used to apply axial force to the conical sealing plug 43, so that the sealing plug 43 is pressed against the conical section of the through cavity 41, thereby achieving the sealing performance that maintains the rotation of the sleeve 2 and the bearing 3. When the conical sealing plug 43 gradually ages, the pressure of the conical sealing plug 43 is automatically compensated by the deformation of the spring under the action of the spring 32.

[0035] Reference Figure 2 , Figure 5 and Figure 6 The bearing seat 4 includes a ferrule 44, a joint body 45 and an external threaded ring 46. The external threaded ring 46 is threadedly connected to the ferrule 44. The joint body 45 meshes and connects the ferrule 44 and the external threaded ring 46. The end of the bearing shell 3 is provided with a mounting hole 34, and the outer surface of the bearing shell 3 is provided with a groove 35 matching the joint body 45.

[0036] In this embodiment, the arrangement of the ferrule 44, the joint body 45 and the external threaded ring 46 is preferred to facilitate the disassembly and installation of the bearing 3. First, the bearing 3 is placed in the ferrule 44, and the joint body 45 is placed in the external threaded ring 46. The external threaded ring 46 is rotated to thread the ferrule 44. The external threaded ring 46 pushes the joint body 45 to interfere with the groove 34, thereby fixing the bearing 3. The bearing 3 can be further fixed to the bearing seat 4 by screws through the mounting holes 34.

[0037] Reference Figure 2 and Figure 3 , further comprising a roller 8, the bearing shell 3 is provided with a trapezoidal outer ring 32, the shaft sleeve 2 is provided with a trapezoidal inner ring 21, and the roller 8 is slidably connected to the trapezoidal outer ring 32 and the trapezoidal inner ring 21.

[0038] In this embodiment, the combination of the convex trapezoidal outer ring 32 and the trapezoidal inner ring 21 reduces the friction of the sleeve 2 and the wear caused by the relative rotation of the sleeve 2 and the bearing 3. The trapezoidal raceway 222 can improve the anti-skew ability of the bearing.

[0039] Reference Figure 2 , also includes a raceway sealing block 22, a lubricant 23 and a connecting screw 24, the trapezoidal inner ring 21 is provided with a notch 221, the raceway sealing block 22 matches the notch 221, the raceway sealing block 22 is fastened together with the trapezoidal inner ring 21 with the notch 221 through the connecting screw 24 to form a complete trapezoidal raceway 222, and the raceway 222 is provided with a lubricant 23.

[0040] In the preferred embodiment of the present invention, when assembling and replacing the roller 8, it is only necessary to loosen the screw 24, remove the raceway sealing block 22, and insert the roller 8 between the trapezoidal outer ring 32 and the trapezoidal inner ring 21 from the notch 22. The lubricant 23 reduces the friction between the sleeve 2 and the bearing 3 caused by relative rolling.

[0041] Reference Figure 1 and Figure 4 The push rod bearing 7 is provided with a groove 71 matching the end of the sleeve 2.

[0042] In this embodiment, preferably, the bearing 7 limits the axial position of the sleeve 2 via the groove 71 .

[0043] Reference Figure 2 and Figure 3 The material of the shaft sleeve 2, the bearing shell 3 and the bearing seat 4 is Cr-Ni alloy, and the material of the roller 8 is cobalt-chromium tungsten carbide.

[0044] In this embodiment, the Cr-Ni alloy is preferably weldable and tough, and the cobalt-chromium tungsten carbide has a small friction coefficient and high strength, thereby ensuring a good rolling friction effect and extending the service life.

[0045] Reference Figure 3 A welding surface 47 is provided on a partial outer surface of the bearing seat 4, and the welding surface 47 is in a sawtooth shape.

[0046] In this embodiment, the serrated welding surface 47 is preferably conducive to the welding of the bearing seat 4 .

[0047] Working principle: the sleeve 2 rotates synchronously with the sinking roller 1, and the bearing seat 4 supports the cooperation between the bearing shell 3 and the sleeve 2. The push rod 6 is used to axially limit the sleeve 2 by adjusting the axial clearance between the thrust push rod bearing 5 and the sleeve 2 to prevent the sleeve 2 from moving relative to the bearing shell 3 along the same straight line. The elastic force of the spring 32 applies axial force to the conical sealing plug 43, so that the sealing plug 43 is pressed against the conical section of the through cavity 41, thereby achieving the sealing performance of the sleeve 2 and the bearing shell 3. When the conical sealing plug 43 gradually ages, under the action of the spring 32, the pressure of the conical sealing plug 43 is automatically compensated by the spring deformation, so that the conical sealing plug 43 and the conical section of the through cavity 41 are always kept in a pressed state, thereby maintaining the sealing performance for a long time, avoiding the wear and aging of the sealing plug that weakens the sealing effect, and preventing liquid from entering the rotating shaft. The bearing shell 3 is placed in the sleeve 44, the joint body 45 is placed in the external threaded ring 46, and the external threaded ring 46 is rotated to thread the sleeve 44. The external threaded ring 46 pushes the joint body 45 to fill the groove 45 with interference, thereby fixing the bearing shell 3. The bearing shell 3 can be further fixed to the bearing seat 4 through the mounting hole 34 with screws, so as to facilitate the removal and installation of the bearing shell 3. The combined use of the convex trapezoidal outer ring 32 and the trapezoidal inner ring 21 reduces the friction of the sleeve 2 and the wear caused by the relative rotation of the sleeve 2 and the bearing shell 3. The convex trapezoidal raceway 222 can improve the anti-skew ability of the bearing. The use of lubricant 23, Cr-Ni alloy and cobalt-chromium tungsten carbide further reduces the friction of the sleeve 2, which is beneficial to reduce the wear of the sleeve 2 and the bearing shell 3, reduce maintenance costs, and improve the stability of the roller system.

Claims

1. A roller bearing bushing assembly for a hot dip galvanizing unit, characterized in that: The invention comprises a sinking roller (1), a shaft sleeve (2), a bearing shell (3), a bearing seat (4), a roller arm (5), a push rod (6) and a push rod bearing (7); the two ends of the sinking roller (1) are fixedly connected to the shaft sleeve (2); the bearing shell (3) is fixedly connected to the inner wall of the bearing seat (4); the shaft sleeve (2) is rotatably connected to the bearing shell (3); the bearing seat (4) is fixedly connected to the roller arm (5); the push rod (6) is fixedly connected to the roller arm (5); the push rod bearing (7) is threadedly connected to the push rod (6); and the push rod bearing (7) abuts against the shaft sleeve (2).

2. A roller bearing bushing assembly for a hot dip galvanizing unit according to claim 1, characterized in that: The sinking roller (1) comprises a roller body (101), two roller flanges (102) and two roller shafts (103); the roller body (101) is a cylindrical structure; the two roller flanges (102) are respectively fixedly connected to two ends of the roller body (101); the two roller shafts (103) are respectively fixedly connected to the two roller flanges (102); and the roller shafts (103) are coaxially arranged with the roller body (101).

3. The roller bearing bushing assembly of a hot dip galvanizing unit according to claim 1, characterized in that: It also includes a conical sealing plug (43), the bearing seat (4) is provided with a through cavity (41), both ends of the bearing seat (4) are provided with axial holes (42), one end of the through cavity (41) is conical, and the conical section of the through cavity (41) is provided with a conical sealing plug (43) that cooperates with the axial hole (42).

4. A roller bearing bushing assembly for a hot dip galvanizing unit according to claim 1, characterized in that: The bearing seat (4) includes a ferrule (44), a joint body (45) and an external threaded ring (46); the external threaded ring (46) is threadedly connected to the ferrule (44); the joint body (45) meshes and connects the ferrule (44) and the external threaded ring (46); a mounting hole (34) is provided at the end of the bearing shell (3); and a groove (35) matching the joint body (45) is provided on the outer surface of the bearing shell (3).

5. The roller bearing bushing assembly of a hot dip galvanizing unit according to claim 1, characterized in that: It also includes a spring (33). The bearing shell (3) is provided with two through grooves (31) at one end perpendicular to the bearing seat (4). One end of the spring (33) is fixedly connected to the bottom end of the through groove (31), and the other end of the spring (33) abuts against a conical sealing plug (43).

6. The roller bearing bushing assembly of a hot dip galvanizing unit according to claim 1, characterized in that: It also includes a roller (8), the bearing shell (3) is provided with a trapezoidal outer ring (32), the shaft sleeve (2) is provided with a trapezoidal inner ring (21), the trapezoidal outer ring (32) and the trapezoidal inner ring (21), and the roller (8) is slidably connected to the trapezoidal outer ring (32) and the trapezoidal inner ring (21).

7. A roller bearing bushing assembly for a hot dip galvanizing unit according to claim 6, characterized in that: The invention also comprises a raceway sealing block (22), a lubricant (23) and a connecting screw (24); the trapezoidal inner ring (21) is provided with a notch (221); the raceway sealing block (22) matches the notch (221); the raceway sealing block (22) is fastened to the trapezoidal inner ring (21) with the notch (221) by means of the connecting screw (24) to form a complete trapezoidal raceway (222); the raceway (222) is provided with a lubricant (23).

8. The roller bearing bushing assembly of a hot dip galvanizing unit according to claim 1, characterized in that: The push rod bearing (7) is provided with a groove (71) matching the end of the shaft sleeve (2).

9. A roller bearing bushing assembly for a hot dip galvanizing unit as claimed in claim 1 and claim 6, characterized in that: The material of the shaft sleeve (2), the bearing bush (3) and the bearing seat (4) is Cr-Ni alloy, and the material of the roller (8) is cobalt-chromium tungsten carbide.

10. The roller bearing bushing assembly of a hot dip galvanizing unit according to claim 1, characterized in that: A welding surface (47) is partially provided on the outer surface of the bearing seat (4), and the welding surface (47) is in a sawtooth shape.

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