I-shaped thrust cylindrical roller bearing isolation block

Abstract

The invention provides an I-shaped thrust cylindrical roller bearing isolation block. The I-shaped thrust cylindrical roller bearing isolation block comprises supporting columns, a first cross beam and a second cross beam. Arc-shaped grooves matched with the cylindrical rollers are formed in the large side faces of the supporting columns; one end of the strut is vertically connected with the first cross beam, two ends of the first cross beam protrude out of the strut and are planes, and the surface, connected with the strut, of the first cross beam is a plane; the other end of the strut is vertically connected with a second cross beam, two ends of the second cross beam protrude out of the strut and are planes, and the surface, connected with the strut, of the second cross beam is a plane; the supporting columns, the first cross beam and the second cross beam form an I-shaped structure; the material utilization rate can be improved, the machining difficulty is reduced, the machining efficiency is improved, the batch production cost is reduced, rolling body abrasion can be reduced, the bearing failure risk is reduced, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of bearings, in particular to an I-type thrust cylindrical roller bearing isolation block. Background Art

[0002] The pitch bearing is a key part of the pitch system, which assists in completing the pitch function of the wind turbine during operation. It mainly bears the loads of the wind turbine blades, hub, and wind, and is an important component for driving the blades to rotate. In the traditional design, the retainer is an integral ring sleeve, which is difficult to process and has low material utilization. Summary of the invention

[0003] In view of the above problems, the purpose of this application is to provide a type of thrust cylindrical roller bearing isolation block, which can improve material utilization, reduce processing difficulty, improve processing efficiency, reduce mass production costs, and reduce rolling element wear, reduce the risk of bearing failure, and increase bearing service life. It is mainly used in three-row columnar variable pitch bearings of large megawatt wind turbines, and can also be extended to other cylindrical thrust roller bearings.

[0004] To achieve part or all of the above-mentioned purposes or other purposes, the present application provides the following technical solutions: an I-type thrust cylindrical roller bearing isolation block, comprising a pillar, a first beam and a second beam; the pillar is a rectangular parallelepiped, comprising a group of opposite end faces, a group of opposite large side faces and a group of opposite small side faces; the group of opposite large side faces is provided with an arc-shaped groove matching the cylindrical roller; one end of the pillar is vertically connected to the first beam, both ends of the first beam protrude from the pillar, both ends of the first beam are planes, the surface where the first beam is connected to the pillar is a plane, and the side face of the first beam is plane with the small side face of the pillar; the other end of the pillar is vertically connected to the second beam, both ends of the second beam protrude from the pillar, both ends of the second beam are planes, the surface where the second beam is connected to the pillar is a plane, and the side face of the second beam is plane with the small side face of the pillar; the pillar, the first beam and the second beam constitute an I-type structure.

[0005] Furthermore, the arc-shaped groove between two adjacent I-type thrust cylindrical roller bearing isolation blocks forms a pocket for accommodating the cylindrical roller, the diameter of the arc-shaped groove at the contact point with the circumferential surface of the cylindrical roller is larger than the diameter of the cylindrical roller, and the I-type thrust cylindrical roller bearing isolation block is in line contact with the cylindrical roller.

[0006] Furthermore, there are a plurality of I-shaped thrust cylindrical roller bearing isolation blocks, and the plurality of I-shaped thrust cylindrical roller bearing isolation blocks form a complete retaining frame; a plurality of first beams form a complete outer beam, and there is a gap between two adjacent first beams, and the total value of all gaps is less than the diameter of a cylindrical roller; a plurality of second beams form a complete inner beam, and there is a gap between two adjacent second beams, and the total value of all gaps is less than the diameter of a cylindrical roller.

[0007] Furthermore, the first crossbeam is provided with a chamfer, and the second crossbeam is provided with a chamfer.

[0008] Furthermore, the material of the I-type thrust cylindrical roller bearing isolation block is polyoxymethylene resin.

[0009] Furthermore, the number of the cylindrical rollers is the same as the number of the I-type thrust cylindrical roller bearing isolation blocks, and the cylindrical rollers and the I-type thrust cylindrical roller bearing isolation blocks are arranged at intervals.

[0010] Furthermore, the assembly method of the I-type thrust cylindrical roller bearing isolation block is as follows: Step 1: Place the inner ring flat on the ground with the end surface of the inner ring touching the ground; Step 2: Place the cylindrical roller and I-type thrust cylindrical roller bearing isolation blocks one by one on the inner ring raceway; Step 3: Install the last two cylindrical rollers and the I-type thrust cylindrical roller bearing isolation block on the inner ring raceway at the same time; Step 4: Put the outer ring onto the cylindrical roller and the I-type thrust cylindrical roller bearing isolation block.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. An I-type spacer is installed between every two rolling elements instead of an integral cage, so as to avoid excessive deformation of the cage and cause breakage when the bearing load is too large. 2. The external dimensions of a single I-type spacer are small, which reduces the processing difficulty and processing equipment requirements. 3. The I-type spacer also plays the role of guiding and fixing the movement of the roller. 4. Compared with the traditional pocket-type cage, the gap between two adjacent I-type spacers can also accommodate more grease. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 A schematic diagram of the present invention in combination with a cylindrical roller; Figure 3 It is a cross-sectional view of the contact between the pillar and the cylindrical roller; Figure 4 is a schematic diagram of the present invention; Figure 5 for Figure 4 Middle AA schematic diagram; Figure 6 for Figure 4 Schematic diagram of the middle BB; In the figure: 1. Pillar; 2. Large side; 3. Small side; 4. First crossbeam; 5. Second crossbeam; 6. Cylindrical roller; 7. Contact point. DETAILED DESCRIPTION

[0013] In order to make the structure and function of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0014] See attached Figure 1-6 , a thrust cylindrical roller 6 bearing isolation block, comprising a pillar 1, a first beam 4 and a second beam 5; the pillar 1 is a rectangular parallelepiped, comprising a group of opposite end faces, a group of opposite large side faces 2 and a group of opposite small side faces 3; the group of opposite large side faces 2 is provided with an arc groove matching the cylindrical roller 6; one end of the pillar 1 is vertically connected to the first beam 4, both ends of the first beam 4 protrude from the pillar 1, the two ends of the first beam 4 are planes, the surface where the first beam 4 is connected to the pillar 1 is a plane, and the side of the first beam 4 is connected to the pillar 1 The other end of the pillar 1 is vertically connected to the second beam 5, both ends of the second beam 5 protrude from the pillar 1, both ends of the second beam 5 are planes, the surface where the second beam 5 is connected to the pillar 1 is a plane, and the side of the second beam 5 is plane with the small side 3 of the pillar 1; the pillar 1, the first beam 4 and the second beam 5 constitute an I-shaped structure; the I-shaped isolation block has a smooth surface, no burrs, uniform color, no pores inside, and no looseness; the external dimensions of a single I-shaped isolation block are small, which reduces the processing difficulty and processing equipment requirements.

[0015] The arc-shaped groove between two adjacent isolation blocks forms a pocket for accommodating the cylindrical roller 6. The diameter of the arc-shaped groove in contact with the circumferential surface of the cylindrical roller 6 is larger than the diameter of the cylindrical roller 6. The I-type thrust cylindrical roller 6 bearing isolation block is in line contact with the cylindrical roller 6. Two adjacent isolation blocks are combined into a pocket, and the cylindrical roller 6 moves up and down in the pocket. During the movement, it makes two line contacts with the pillar 1, with the contact point 7. The I-type isolation block guides and fixes the movement of the roller. The gap between two adjacent I-type isolation blocks can also accommodate more grease.

[0016] There are several I-shaped thrust cylindrical roller 6 bearing isolation blocks, and the several I-shaped thrust cylindrical roller 6 bearing isolation blocks form a complete retaining frame, several first beams 4 form a complete outer beam, there is a gap between two adjacent first beams 4, and the total value of all gaps is less than the diameter of a cylindrical roller 6; several second beams 5 form a complete inner beam, there is a gap between two adjacent second beams 5, and the total value of all gaps is less than the diameter of a cylindrical roller 6; the maximum value of the total gap of the isolation block is less than the diameter of a single cylindrical roller 6 to prevent the roller from falling out; an I-shaped isolation block is installed between every two rolling bodies instead of an integral retaining frame to avoid excessive deformation of the retaining frame and cause breakage when the bearing load is too large.

[0017] The first crossbeam 4 is provided with a chamfer, and the second crossbeam 5 is provided with a chamfer; the chamfer helps to improve the efficiency of grease entering the cage and more fully lubricate the rollers.

[0018] The material of the I-type thrust cylindrical roller 6 bearing isolation block is polyoxymethylene resin; it has a long service life and is fatigue-resistant.

[0019] The number of the cylindrical rollers 6 is the same as the number of the isolation blocks, and the cylindrical rollers 6 and the isolation blocks are arranged at intervals.

[0020] The assembly method of the I-type thrust cylindrical roller bearing isolation block is as follows: Step 1: Place the inner ring flat on the ground with the end surface of the inner ring touching the ground; Step 2: Place the cylindrical roller 6 and the I-type thrust cylindrical roller 6 bearing isolation blocks one by one on the inner ring raceway; Step 3: The last two cylindrical rollers 6 and the I-type thrust cylindrical roller 6 bearing isolation block are installed on the inner ring raceway at the same time; Step 4: Put the outer ring on the outside of the cylindrical roller 6 and the I-type thrust cylindrical roller 6 bearing isolation block.

[0021] The basic dimensions of the isolation block are determined based on the roller diameter, length and other dimensions and the thrust raceway dimensions of the three-row columnar roller bearing. The spacing between the large and small heads of the rolling elements in a uniformly distributed state is determined based on the position and number of the rolling elements in the bearing, and the thickness of the working area of ​​the isolation block is determined accordingly.

[0022] When it is necessary to assemble a cylindrical roller with a diameter of 55mm and a length of 55mm, the diameter of the isolation block's support column at the contact point with the cylindrical roller is 55.4mm, the width of the large side of the support column is 40mm (error 0.15mm), and the support column is 56.66mm high; the length of the first beam is 64.0964mm, and the total gap value between several first beams is less than 55mm; the length of the second beam is 60.9299mm, and the total gap value between several second beams is less than 55mm.

[0023] This application can improve material utilization, reduce processing difficulty, improve processing efficiency, and reduce mass production costs. At the same time, it can reduce rolling element wear, reduce the risk of bearing failure, and increase the service life of bearings.

[0024] The above disclosure is only the preferred embodiment of the present application, which certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. I-type thrust cylindrical roller bearing isolation block, characterized by: It includes a pillar, a first crossbeam and a second crossbeam; the pillar is a rectangular parallelepiped, including a group of opposite end faces, a group of opposite large side faces and a group of opposite small side faces; the group of opposite large side faces is provided with an arc groove matching the cylindrical roller; one end of the pillar is vertically connected to the first crossbeam, both ends of the first crossbeam protrude from the pillar, both ends of the first crossbeam are planes, the surface where the first crossbeam is connected to the pillar is a plane, and the side face of the first crossbeam is plane with the small side face of the pillar; the other end of the pillar is vertically connected to the second crossbeam, both ends of the second crossbeam protrude from the pillar, both ends of the second crossbeam are planes, the surface where the second crossbeam is connected to the pillar is a plane, and the side face of the second crossbeam is plane with the small side face of the pillar; the pillar, the first crossbeam and the second crossbeam constitute an I-shaped structure.

2. The I-type thrust cylindrical roller bearing isolation block according to claim 1 is characterized in that: The arc-shaped groove between two adjacent I-type thrust cylindrical roller bearing isolation blocks forms a pocket for accommodating the cylindrical roller. The diameter of the arc-shaped groove at the contact point with the cylindrical roller circumference is greater than the diameter of the cylindrical roller. The I-type thrust cylindrical roller bearing isolation block is in line contact with the cylindrical roller.

3. The I-type thrust cylindrical roller bearing isolation block according to claim 1 is characterized in that: There are a plurality of I-shaped thrust cylindrical roller bearing isolation blocks, which form a complete retaining frame; a plurality of first beams form a complete outer beam, there is a gap between two adjacent first beams, and the total value of all gaps is less than the diameter of a cylindrical roller; a plurality of second beams form a complete inner beam, there is a gap between two adjacent second beams, and the total value of all gaps is less than the diameter of a cylindrical roller.

4. The I-type thrust cylindrical roller bearing isolation block according to claim 1 is characterized in that: The first cross beam is provided with a chamfer, and the second cross beam is provided with a chamfer.

5. The I-type thrust cylindrical roller bearing isolation block according to claim 1 is characterized in that: The material of the I-type thrust cylindrical roller bearing isolation block is polyoxymethylene resin.

6. The I-shaped thrust cylindrical roller bearing isolation block according to any one of claims 1 to 5, characterized in that: The number of the cylindrical rollers is the same as the number of the I-type thrust cylindrical roller bearing isolation blocks, and the cylindrical rollers and the I-type thrust cylindrical roller bearing isolation blocks are arranged at intervals.

7. The I-type thrust cylindrical roller bearing isolation block according to claim 6 is characterized in that: The assembly method is as follows: Step 1: Place the inner ring flat on the ground with the end surface of the inner ring touching the ground; Step 2: Place the cylindrical roller and I-type thrust cylindrical roller bearing isolation blocks one by one on the inner ring raceway; Step 3: Install the last two cylindrical rollers and the I-type thrust cylindrical roller bearing isolation block on the inner ring raceway at the same time; Step 4: Put the outer ring onto the cylindrical roller and the I-type thrust cylindrical roller bearing isolation block.

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