A clearance-adjustable elastic radial sliding bearing

Abstract

The invention relates to an elastic radial sliding bearing with adjustable gap, wherein eight gaps are respectively provided at the left and right ends of the elastic bearing; the outer circle of the elastic bearing is two outer conical surfaces, and the inner holes of the bearing outer sleeve and the bearing inner sleeve are both designed as inner conical surfaces. The bearing outer sleeve and the bearing inner sleeve respectively cooperate with the outer conical surfaces of the elastic bearing through the inner conical surfaces, and the bearing outer sleeve and the bearing inner sleeve are threadedly connected; if it is found that the gap between the bearing and the rotor is too large during assembly, trial run, maintenance and use of the equipment, the bearing inner sleeve can be screwed at any time according to technical requirements to adjust the gap between the bearing inner hole and the rotor. The present invention avoids the situation where the bearing needs to be remade due to excessive gap between the bearing and the rotor (drive shaft) due to design, use and manufacturing reasons, and has the advantages of reducing costs and increasing efficiency; the elastic scaling gap is large, which can realize the serialization and standardization of sliding bearings; reasonable gap debugging can best control the temperature and vibration of the bearing rotor during operation.

Description

Technical Field

[0001] The invention relates to a sliding bearing, in particular to an elastic radial sliding bearing with adjustable clearance. Background Art

[0002] The primary function of radial sliding bearings in mechanical transmission is to support the load of the rotor (drive shaft) and ensure stable rotor operation. Bearing accuracy and the proper clearance between the bearing inner diameter and the rotor are key factors in stable rotor operation. Currently, there are three main scenarios regarding radial clearance in sliding bearings. In the first, designers calculate and design the bearing radial clearance based on experience, formulas, and software. If the clearance is too large during a test run after assembly, the bearing must be remanufactured. In the second, after a certain period of operation, maintenance reveals that the bearing inner bore has enlarged due to wear, necessitating remanufacture. In the third, during the bearing manufacturing process, errors in operation or measurement by workers result in the bearing inner bore being larger than the design requirement, necessitating remanufacture. Summary of the Invention

[0003] In order to overcome the above-mentioned problems of the prior art, the purpose of the present invention is to provide a gap-adjustable elastic radial sliding bearing, the inner hole diameter of the bearing can be scaled within a scaling range of 0-1.5 mm, which can solve the problem of excessive gap between the bearing and the rotor (drive shaft) caused by design, use and manufacturing reasons, and the gap between the inner hole of the bearing and the rotor can be adjusted at any time during assembly, debugging and use. In particular, during the test run, the gap adjustment can ensure that the rotor operates at a relatively ideal indicator state, which is one of the powerful factors to ensure the stable operation of the rotor.

[0004] In order to achieve the above object, the technical solution of the present invention is:

[0005] A clearance-adjustable elastic radial sliding bearing comprises an elastic bearing 1, a bearing outer sleeve 2 and a bearing inner sleeve 3. Eight elastic gaps 1-R and 1-L are respectively provided on the left and right ends of the elastic bearing 1. The outer circle of the elastic bearing 1 is formed into two outer conical surfaces 1-RZ and 1-LZ. The inner holes of the bearing outer sleeve 2 and the bearing inner sleeve 3 are respectively designed as inner conical surfaces 2-Z and 3-Z. The bearing outer sleeve 2 and the bearing inner sleeve 3 respectively cooperate with the outer conical surfaces 1-RZ and 1-LZ of the elastic bearing 1 through the inner conical surfaces 2-Z and 3-Z. The bearing outer sleeve 2 and the bearing inner sleeve 3 are threadedly connected.

[0006] The elastic bearing 1 is designed with 8 elastic gaps 1-R running through the inner and outer circles on the right side; the elastic bearing 1 is designed with 8 gaps 1-L running through the inner and outer circles on the left side. The elastic gap width is 1mm. The 16 elastic gaps make the elastic bearing 1 radially elastic and shrinkable.

[0007] The outer ends of the elastic bearing 1 are designed as outer conical surfaces 1-RZ and 1-LZ respectively. The outer conical surface 1-RZ at one end is long and has a small taper, which cooperates with the bearing outer sleeve 2; the outer conical surface 1-LZ at the other end is short and has a large taper, which cooperates with the bearing inner sleeve 3.

[0008] The end surface of the bearing inner sleeve 3 is designed with scale lines, and a scale pointer 5 is fixed on the bearing outer sleeve 2.

[0009] The end surface of the bearing inner sleeve 3 has 6 evenly distributed holes and 25 scale lines.

[0010] The beneficial effects of the present invention are as follows: the inner diameter of the elastic radial sliding bearing with adjustable gap can be scaled, and the scaling range is 0-1.5mm. If it is found that the gap between the bearing and the rotor (drive shaft) is too large during the assembly, test run, maintenance and use of the equipment, the gap between the inner hole of the bearing and the rotor can be adjusted at any time according to technical requirements. By adjusting the gap, it is ensured that the rotor operates in a relatively ideal indicator state during the test run or trial operation of the equipment. The present invention avoids the situation where the bearing needs to be remade due to excessive gap between the bearing and the rotor (drive shaft) due to design, use and manufacturing reasons, and has the advantages of reducing costs and increasing efficiency; the elastic scaling gap is large, which can realize the serialization and standardization of sliding bearings; reasonable gap adjustment can best control the temperature and vibration of the bearing rotor during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional exploded view of the present invention.

[0012] Figure 2 It is a two-dimensional diagram of the present invention. DETAILED DESCRIPTION

[0013] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] Reference Figure 1 and Figure 2, a clearance-adjustable elastic radial sliding bearing, comprising an elastic bearing 1, a bearing outer sleeve 2 and a bearing inner sleeve 3, eight 1mm elastic gaps 1-R, 1-L are opened on the left and right ends of the elastic bearing 1, so that the elastic bearing has radial elasticity and shrinkage; the outer circle of the elastic bearing 1 is two outer conical surfaces 1-RZ, 1-LZ, the inner holes of the bearing outer sleeve 2 and the bearing inner sleeve 3 are designed as inner conical surfaces 2-Z, 3-Z respectively, the bearing outer sleeve 2 and the bearing inner sleeve 3 are matched with the outer conical surfaces 1-RZ, 1-LZ of the elastic bearing 1 through the inner conical surfaces 2-Z, 3-Z respectively, the end face of the bearing inner sleeve 3 is designed with scale lines, and a scale pointer 5 is fixed on the bearing outer sleeve 2, the bearing outer sleeve 2 and the bearing inner sleeve 3 are connected by a thread with a pitch of 0.5, the thread is a right-hand thread, the outer circle of the bearing outer sleeve 2 is matched with the housing bearing seat, and a pin is installed through the outer circle positioning pin hole to prevent the bearing outer sleeve 2 and the bearing seat from circumferential relative movement; a screw A 4 is used as a locking device to prevent the bearing outer sleeve 2 and the bearing inner sleeve 3 from relative movement. The scale pointer 5 provides quantitative indication of the adjustment gap. The B screw 6 is used to fix the scale pointer 5 on the bearing outer sleeve 2. The end face of the bearing inner sleeve 3 has 6 evenly distributed holes and 25 scale lines. The 6 evenly distributed holes are used to install a wrench to tighten the bearing inner sleeve 3. The 25 scale lines form 25 grids, and each grid represents 0.01mm.

[0015] Reference Figure 2 The right side of the elastic bearing 1 is designed with 8 elastic slits 1-R that penetrate the inner and outer circles, R1 is the elastic slit penetrating part, and R2 is the non-penetrating part of the edge of the elastic bearing 1, that is, there is no gap on the edge of the elastic bearing 1 to ensure that the elastic bearing 1 is still a whole; the left side of the elastic bearing 1 is designed with 8 slits 1-L that penetrate the inner and outer circles, L1 is the penetrating part, L2 is the non-penetrating part of the edge, the gap width is 1mm, and the 16 gaps make the elastic bearing 1 radially elastic and shrinkable.

[0016] The outer diameter of the elastic bearing 1 is designed with two outer tapered surfaces 1-RZ and 1-LZ at each end. The outer tapered surface 1-RZ on one end is longer and less tapered, mating with the bearing outer sleeve 2 for reliable positioning and enhanced strength. The outer tapered surface 1-LZ on the other end is shorter and more tapered, mating with the bearing inner sleeve 3 for relatively easy rotation. When the bearing outer sleeve 2 is stationary and the bearing inner sleeve 3 is rotated clockwise along the 0.5 pitch inner thread, the bearing outer sleeve 2 and the bearing inner sleeve 3 approach each other, and the inner tapered surfaces of the bearing outer sleeve 2 and the bearing inner sleeve 3 exert a compressive force on the outer tapered surfaces at both ends of the elastic bearing 1. As a result, the inner bore of the elastic bearing 1 contracts due to the 1mm gap on both sides. The inner bore can shrink by 0-1.5mm, and the inner bore of the elastic bearing 1 shrinks by 0.25mm with each rotation of the bearing inner sleeve 3.

[0017] The elastic bearing 1 is composed of outer high-quality carbon structural steel and inner tin-based alloy layer; the bearing outer sleeve 2 and the bearing inner sleeve 3 are 40-50# high-quality carbon structural steel, quenched and tempered HB280-320.

[0018] Working principle of the present invention:

[0019] First, secure the adjustable-gap elastic radial sliding bearing of the present invention to a bearing seat or other fixture. Install a pin at the outer pinhole of the bearing sleeve 2 corresponding to the bearing seat or other fixture to prevent circumferential rotation of the bearing sleeve 2. Then, remove screw A 4 and insert a mounting wrench into the six evenly spaced holes on the end face of the bearing inner sleeve 3 to twist the bearing inner sleeve 3. Each turn of the bearing inner sleeve 3 shrinks the inner bore of the elastic bearing 1 by 0.25 mm. Observe the scale pointer 5. Each tick on the scale line on the end face of the bearing inner sleeve 3 indicates a 0.01 mm shrinkage of the inner bore of the elastic bearing 1. Determine the required clearance reduction by millimeters based on the design or equipment test results, and twist the bearing inner sleeve 3 to move the scale pointer 5 by that many ticks. Then, tighten screw 4 to lock the bearing sleeve 2 and the bearing inner sleeve 3, preventing the bearing-rotor clearance from changing due to relative movement between the bearing sleeve 2 and the bearing inner sleeve 3 during rotor (equipment) operation.

[0020] Example 1

[0021] During the assembly of a gearbox sliding bearing, the clearance between the bearing inner bore and the rotor (drive shaft) was detected to be 0.17mm. Later, during a test run, significant shaft vibration was observed. Expert review and analysis determined that the bearing clearance was excessive and should be adjusted to 0.12mm. First, open the housing, remove screw A (4), and use the installation wrench to turn the bearing inner sleeve (3) clockwise. Observe that the scale pointer (5) moves counterclockwise from the 0 scale mark to the 5 scale mark (i.e., 5 spaces). Then, tighten screw A (4). Use a dial indicator to recheck the actual clearance between the bearing inner bore and the rotor (drive shaft).

Claims

1. A clearance-adjustable elastic radial sliding bearing, comprising an elastic bearing (1), a bearing outer sleeve (2) and a bearing inner sleeve (3), characterized in that: The elastic bearing (1) is provided with eight elastic gaps (1-R, 1-L) at both ends; the outer circle of the elastic bearing (1) is two outer conical surfaces (1-RZ, 1-LZ); the inner holes of the bearing outer sleeve (2) and the bearing inner sleeve (3) are respectively designed as inner conical surfaces (2-Z, 3-Z); the bearing outer sleeve (2) and the bearing inner sleeve (3) are respectively matched with the outer conical surfaces (1-RZ, 1-LZ) of the elastic bearing (1) through the inner conical surfaces (2-Z, 3-Z); the bearing outer sleeve (2) and the bearing inner sleeve (3) are threadedly connected; The right side of the elastic bearing (1) is designed with 8 elastic gaps (1-R) ​​penetrating the inner and outer circles; the left side of the elastic bearing (1) is designed with 8 gaps (1-L) penetrating the inner and outer circles, the elastic gap width is 1mm, and the 16 elastic gaps make the elastic bearing (1) radially elastic and contractible; The outer ends of the elastic bearing (1) are respectively designed as outer conical surfaces (1-RZ, 1-LZ). The outer conical surface (1-RZ) at one end is long and has a small taper, and is matched with the bearing outer sleeve (2); the outer conical surface (1-LZ) at the other end is short and has a large taper, and is matched with the bearing inner sleeve (3).

2. The gap-adjustable elastic radial sliding bearing according to claim 1, characterized in that: The end surface of the bearing inner sleeve (3) is designed with scale lines, and a scale pointer (5) is fixed on the bearing outer sleeve (2).

3. The gap-adjustable elastic radial sliding bearing according to claim 1, characterized in that: The end surface of the bearing inner sleeve (3) is provided with 6 evenly distributed holes and 25 scale lines.

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