Roller bearing assembly structure

Abstract

The present invention belongs to the technical field of steel rolling equipment, and in particular relates to a roller bearing assembly structure; the roller is rotatably mounted in a bearing seat through a cylindrical roller bearing and a tapered roller bearing, and an axial positioning component is installed on the roller, and the cylindrical roller bearing and the tapered roller bearing are axially positioned by the axial positioning component; an oil inlet channel No. 1 and an oil inlet channel No. 2 arranged along the axial direction are provided in the bearing seat, and a plurality of annular oil grooves are opened on the inner hole wall of the bearing seat, the oil inlet channel No. 1 is connected to the annular oil groove through a plurality of No. 1 branches, and the oil inlet channel No. 2 is connected to the annular oil groove through a plurality of groups of No. 2 branches. The present invention can solve the roller assembly problem in the prior art, and at the same time solves the problem of poor bearing lubrication effect caused by unreasonable lubrication channels.

Description

Technical Field

[0001] The invention belongs to the technical field of steel rolling equipment, and in particular relates to a roller bearing assembly structure. Background Art

[0002] As the width of steel strip produced by steel companies increases, the size of the corresponding rolling mill rolls is also increasing. Simultaneously, the size of the bearings in the roll system is also increasing. As the rolls rotate during operation, they must withstand not only radial forces but also axial forces. This places higher demands on their assembly structure, requiring a more rational and stable assembly. At the same time, the lubrication method for the bearings has become an issue that needs continuous improvement. In the past, due to the relatively small size of the bearings used in small strip production lines, a single oil-inlet (with only one oil inlet hole drilled in the rolling mill bearing seat) oil-air lubrication method was sufficient. However, this cannot meet the requirements of rolling mills in large strip production lines. If a single oil-inlet method is still used, it can easily cause the bearings in the rolling mill shaft roll system to burn out. Summary of the Invention

[0003] In view of this, the present invention aims to propose a roller bearing assembly structure that can solve the roller assembly difficulties in the prior art and solve the problem of poor bearing lubrication effect caused by unreasonable lubrication channels.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A roller bearing assembly structure, wherein the roller is rotatably mounted in a bearing seat via a cylindrical roller bearing and a tapered roller bearing, and an axial positioning assembly is mounted on the roller to axially position the cylindrical roller bearing and the tapered roller bearing;

[0006] The bearing seat is provided with an oil inlet channel No. 1 and an oil inlet channel No. 2 arranged along the axial direction. The oil inlet channel No. 1 and the oil inlet channel No. 2 are respectively arranged on both sides of the bearing seat and are arranged diagonally. A number of annular oil grooves are opened on the inner hole wall of the bearing seat. The oil inlet channel No. 1 is connected to the annular oil groove through a number of No. 1 branches, and the oil inlet channel No. 2 is connected to the annular oil groove through a number of No. 2 branches.

[0007] Furthermore, each group of No. 2 branches includes a main branch and a reversing branch; the reversing branch is connected to the annular oil groove, the main branch connects the No. 2 oil inlet channel and the reversing branch, and the main branch and the reversing branch are vertically staggered and connected at the intersection.

[0008] Furthermore, the end ports of branch No. 1, the main branch and the reversing branch are closed by screw plugs.

[0009] Furthermore, the axial positioning assembly includes a sleeve and a cup for separating the tapered roller bearing and the cylindrical roller bearing. The sleeve is sleeved on the roller and is squeezed between the inner ring of the tapered roller bearing and the shoulder of the roller. The cup is sleeved outside the tapered roller bearing and has a positioning end at the end that is squeezed between the outer ring of the tapered roller bearing and the cylindrical roller bearing. A lubrication channel is opened in the cup that passes through the sleeve wall.

[0010] Furthermore, the axial positioning assembly also includes a threaded sleeve and a support sleeve positioned on the rolling roller, a front transparent cover sealed on the outside of the tapered roller bearing, and a rear transparent cover sealed on the outside of the cylindrical roller bearing; the threaded sleeve is sleeved on the rolling roller and one side of it is squeezed on the end face of the inner ring of the tapered roller bearing, the front transparent cover is detachably connected to the sleeve cup and has a convex ring on its inner side that is tightly pressed against the outer ring of the tapered roller bearing, the support sleeve is sleeved on the rolling roller and is squeezed on the cylindrical roller bearing and the shoulders of the rolling roller, and the rear transparent cover is detachably fixed to the bearing seat.

[0011] Furthermore, the front transparent cover is sleeved outside the threaded sleeve and a J-shaped frameless sealing ring is installed between the two; the rear transparent cover is sleeved outside the support sleeve and a J-shaped frameless sealing ring is installed between the two.

[0012] Furthermore, an exhaust hole communicating with the outside is opened in the rear transparent cover.

[0013] Furthermore, the outer side of the threaded sleeve is positioned by a half ring and a round nut connected together, the half ring is clamped in a positioning groove set in the roller, and the round nut is screwed onto the outside of the threaded sleeve. At the same time, the half ring and the round nut are connected together by a connecting block.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The rollers are installed in the bearing seats through cylindrical roller bearings and tapered roller bearings. The cylindrical roller bearings are subjected to radial force and bear the rolling pressure of the rolling mill. The tapered roller bearings mainly bear axial force and are used to bear the radial force of the roller system. In addition, the axial positioning components installed on the rollers can axially position the cylindrical roller bearings and tapered roller bearings, making the bearing assembly more stable and improving the performance of the equipment.

[0016] The present invention is based on the original single oil inlet of the rolling mill bearing seat, and double oil inlet channels are processed at appropriate positions, which can increase the oil inlet amount and improve the lubrication effect. In addition, the lubrication channel is reasonably and cleverly designed, and the lubricating oil can form a rotating oil supply in the annular oil groove, thereby increasing the running speed of the lubricating oil, which can achieve more sufficient lubrication and further improve the lubrication effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a structural diagram of the bearing seat;

[0020] Figure 3 Schematic diagram of the distribution of lubricating oil channels in the bearing seat;

[0021] Figure 4 This is the main view of the bearing seat;

[0022] Figure 5 for Figure 4 Cross-sectional view of the middle bearing seat at section A;

[0023] Figure 6 It is a top view of the bearing seat;

[0024] Figure 7 for Figure 6 Cross-sectional view of the middle bearing seat at section B.

[0025] Description of reference numerals:

[0026] 1-roller; 2-bearing seat; 21-oil inlet channel No. 1; 211-branch No. 1; 22-oil inlet channel No. 2; 221-main branch; 222-reversing branch; 23-annular oil groove; 24-screw plug; 31-cylindrical roller bearing; 32-tapered roller bearing; 41-sleeve; 42-cup; 421-lubrication channel; 422-locating end; 51-front transparent cover; 52-rear transparent cover; 521-exhaust hole; 61-threaded sleeve; 62-support sleeve; 7-J-type skeletonless sealing ring; 81-half ring; 82-round nut; 83-connecting block. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0030] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0031] like Figure 1-7 As shown, a roller bearing assembly structure, the roller 1 is rotatably mounted in a bearing seat 2 via a cylindrical roller bearing 31 and a tapered roller bearing 32, and an axial positioning assembly is installed on the roller 1 to axially position the cylindrical roller bearing 31 and the tapered roller bearing 32;

[0032] The bearing seat 2 is provided with an oil inlet channel No. 1 21 and an oil inlet channel No. 2 22 arranged along the axial direction. The oil inlet channel No. 1 21 and the oil inlet channel No. 2 22 are respectively arranged on both sides of the bearing seat 2 and are arranged diagonally. A plurality of annular oil grooves 23 are opened on the inner hole wall of the bearing seat 2. The oil inlet channel No. 1 21 is connected to the annular oil groove 23 through a plurality of No. 1 branches 211, and the oil inlet channel No. 2 22 is connected to the annular oil groove 23 through a plurality of No. 2 branches. Each group of No. 2 branches includes a main branch 221 and a reversing branch 222; the reversing branch 222 is connected to the annular oil groove 23, and the main branch 221 connects the No. 2 oil inlet channel 22 and the reversing branch 222, and the main branch 221 and the reversing branch 222 are vertically staggered and connected at the intersection.

[0033] The traditional single oil inlet lubrication method has a relatively small amount of oil inlet. At the same time, the lubrication effect depends on the oil inlet amount and the random oil flow direction, and the lubrication effect is relatively general. The present invention is based on the original rolling mill bearing seat 2 with a single oil inlet, and processes a double oil inlet channel at an appropriate position. This can increase the oil inlet amount and improve the lubrication effect. In addition, the design of the second branch is mainly to make the lubricating oil form a rotating oil supply in the annular oil groove 23. Because the bearing seat 2 is also equipped with other components, the position of the second oil inlet channel 22 is relatively fixed and cannot be changed at will. Figure 5 The flow distribution of the lubricating oil in the bearing seat 2 is shown. If the main branch 221 is directly connected to the annular oil groove 23, the oil supplies of the two oil inlet channels in the annular oil groove 23 will collide due to the opposite flow directions, and a one-way rotating oil supply cannot be formed. Therefore, a reversing branch 222 is added to reverse the lubricating oil entering the No. 2 oil inlet channel 22, so that the oil inlet flow direction in the annular oil groove 23 is the same as that of the No. 1 oil inlet channel 21, so that the lubricating oil forms a rotating oil supply in the annular oil groove 23, thereby increasing the running speed of the lubricating oil, which can provide more sufficient lubrication and further improve the lubrication effect.

[0034] Furthermore, the end ports of the No. 1 branch 211, the main branch 221 and the reversing branch 222 are closed by screw plugs 24 to prevent the lubricating oil from leaking out.

[0035] The axial positioning assembly includes a sleeve 41 and a cup 42 for separating the tapered roller bearing 32 and the cylindrical roller bearing 31. The sleeve 41 is sleeved on the roller 1 and is squeezed between the inner ring of the tapered roller bearing 32 and the shoulder of the roller 1. The cup 42 is sleeved outside the tapered roller bearing 32 and has a positioning end 422 at the end that is squeezed between the outer ring of the tapered roller bearing 32 and the cylindrical roller bearing 31. A lubrication channel 421 is opened in the cup 42 through the sleeve wall to facilitate the entry of lubricating oil to lubricate the bearings. The axial positioning assembly also includes a threaded sleeve 61 and a support sleeve 62 positioned on the roller 1, as well as a front transparent cover 51 sealed on the outside of the tapered roller bearing 32 and a rear transparent cover 52 sealed on the outside of the cylindrical roller bearing 31; the threaded sleeve 61 is sleeved on the roller 1 and one side of it is pressed against the end face of the inner ring of the tapered roller bearing 32, the front transparent cover 51 is detachably connected to the sleeve cup 42 and has a convex ring on its inner side that is tightly pressed against the outer ring of the tapered roller bearing 32, the support sleeve 62 is sleeved on the roller 1 and is pressed against the cylindrical roller bearing 31 and the shaft shoulder of the roller 1, and the rear transparent cover 52 is detachably fixedly connected to the bearing seat 2.

[0036] Preferably, the front transparent cover 51 is sleeved over the threaded sleeve 61 with a J-shaped frameless sealing ring 7 installed between the two; the rear transparent cover 52 is sleeved over the support sleeve 62 with a J-shaped frameless sealing ring 7 installed between the two. The J-shaped frameless sealing ring 7 has excellent sealing performance and can provide a good sealing effect to prevent lubricating oil leakage.

[0037] Preferably, an exhaust hole 521 is provided in the rear transparent cover 52. Because the roller system is sealed internally and the bearings in the roller system are lubricated with oil and gas, when oil and gas are passed from the outside to the inside of the roller system, the exhaust hole 521 is required to exhaust gas to facilitate the entry of oil and gas.

[0038] Preferably, the outer side of the threaded sleeve 61 is positioned by a half ring 81 and a round nut 82 connected together. The half ring 81 is stuck in the positioning groove set in the roller 1, and the round nut 82 is screwed onto the outside of the threaded sleeve 61. At the same time, the half ring 81 and the round nut 82 are connected together by a connecting block 83. The threaded sleeve 61 serves as the end of the entire positioning system and plays a key role in the positioning of the bearing. With this ingenious positioning structure, the threaded sleeve 61 is positioned axially and radially at the same time, thereby ensuring the stable installation and positioning of the entire structure. How to install the half ring 81 in the positioning groove in the roller 1 for the convenience of installation? Since closed structures such as circular rings cannot be installed in the positioning groove in the roller 1, the half ring 81 is used to cleverly solve this problem.

[0039] During installation, the roller 1 is installed in the bearing seat 2 through the cylindrical roller bearing 31 and the tapered roller bearing 32. The cylindrical roller bearing 31 is subjected to radial force and bears the rolling pressure of the rolling mill. The tapered roller bearing 32 mainly bears axial force and is used to bear the radial force of the roller system. In addition, the cylindrical roller bearing 31 and the tapered roller bearing 32 are axially positioned by the axial positioning component installed on the roller 1. At the same time, the sealing and lubrication of the bearings are taken into consideration, making the assembly of the bearings more stable and reasonable, thereby improving the performance of the equipment.

[0040] The present invention is based on the original single oil inlet of the rolling mill bearing seat 2, and a double oil inlet channel is processed at an appropriate position, which can increase the oil inlet amount and improve the lubrication effect. In addition, the lubrication channel 421 is reasonably and cleverly designed, and the lubricating oil can form a rotating oil supply in the annular oil groove 23, thereby increasing the running speed of the lubricating oil, which can provide more sufficient lubrication and further improve the lubrication effect.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A roller bearing assembly structure, characterized in that: The roller (1) is rotatably mounted in a bearing seat (2) via a cylindrical roller bearing (31) and a tapered roller bearing (32), and an axial positioning assembly is mounted on the roller (1) to axially position the cylindrical roller bearing (31) and the tapered roller bearing (32). The bearing seat (2) is provided with a No. 1 oil inlet channel (21) and a No. 2 oil inlet channel (22) arranged in the axial direction. The No. 1 oil inlet channel (21) and the No. 2 oil inlet channel (22) are respectively arranged on both sides of the bearing seat (2) and are arranged diagonally. A plurality of annular oil grooves (23) are opened on the inner hole wall of the bearing seat (2). The No. 1 oil inlet channel (21) is connected to the annular oil groove (23) through a plurality of No. 1 branches (211), and the No. 2 oil inlet channel (22) is connected to the annular oil groove (23) through a plurality of groups of No. 2 branches. Each group of No. 2 branches includes a main branch (221) and a reversing branch (222); the reversing branch (222) is connected to the annular oil groove (23); the main branch (221) connects the No. 2 oil inlet channel (22) and the reversing branch (222); and the main branch (221) and the reversing branch (222) are vertically staggered and connected at the intersection, so as to reverse the direction of the lubricating oil entering the No. 2 oil inlet channel (22) so that the lubricating oil flows in the same direction as the oil inlet of the No. 1 oil inlet channel (21) in the annular oil groove (23); The axial positioning assembly comprises a sleeve (41) and a sleeve cup (42) for separating a tapered roller bearing (32) and a cylindrical roller bearing (31); a lubrication channel (421) penetrating the sleeve wall is provided in the sleeve cup (42).

2. The roller bearing assembly structure according to claim 1, characterized in that: The end ports of the No. 1 branch (211), the main branch (221) and the reversing branch (222) are closed by screw plugs (24).

3. The roller bearing assembly structure according to claim 1, characterized in that: The shaft sleeve (41) of the axial positioning assembly is sleeved on the roller (1) and is squeezed between the inner ring of the tapered roller bearing (32) and the shaft shoulder of the roller (1); the sleeve cup (42) is sleeved outside the tapered roller bearing (32) and has a positioning end (422) at its end that is squeezed between the outer ring of the tapered roller bearing (32) and the cylindrical roller bearing (31).

4. The roller bearing assembly structure according to claim 3, characterized in that: The axial positioning assembly further comprises a threaded sleeve (61) and a support sleeve (62) positioned on the roller (1), a front transparent cover (51) sealed on the outside of the tapered roller bearing (32), and a rear transparent cover (52) sealed on the outside of the cylindrical roller bearing (31); the threaded sleeve (61) is sleeved on the roller (1) and one side thereof is pressed against the inner ring end face of the tapered roller bearing (32); the front transparent cover (51) is detachably connected to the sleeve cup (42) and the inner side of the front transparent cover is provided with a convex ring tightly pressed against the outer ring of the tapered roller bearing (32); the support sleeve (62) is sleeved on the roller (1) and is pressed against the cylindrical roller bearing (31) and the shaft shoulder of the roller (1); and the rear transparent cover (52) is detachably fixedly connected to the bearing seat (2).

5. The roller bearing assembly structure according to claim 4, characterized in that: The front transparent cover (51) is sleeved on the outside of the threaded sleeve (61) and a J-shaped frameless sealing ring (7) is installed between the two; the rear transparent cover (52) is sleeved on the outside of the support sleeve (62) and a J-shaped frameless sealing ring (7) is installed between the two.

6. The roller bearing assembly structure according to claim 4, characterized in that: The rear transparent cover (52) is provided with an exhaust hole (521) communicating with the outside world.

7. The roller bearing assembly structure according to claim 4, characterized in that: The outer side of the threaded sleeve (61) is positioned by a half ring (81) and a round nut (82) connected together. The half ring (81) is stuck in a positioning groove provided in the roller (1), and the round nut (82) is screwed onto the outside of the threaded sleeve (61). At the same time, the half ring (81) and the round nut (82) are connected together by a connecting block (83).

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