Structure of Guide bar rollers

here are two rotation modes of the rotatable lifting rod: manual roller type and electric motor type.

The roller is called rolling Guide bar rollers, which is used to support the rotating shaft and parts on the shaft, and maintain the normal working position and rotation accuracy of the shaft. The rolling Guide bar rollers is easy to use and maintain, reliable to work, good starting performance, and high Guide bar rollers capacity at medium speed. Compared with sliding Guide bar rollers, rolling Guide bar rollers has larger radial dimension, poor damping capacity, low service life and larger noise at high speed.

brief introduction

Rolling Guide bar rollers is a kind of precise mechanical element which changes the sliding friction between the running shaft and the shaft seat into rolling friction, so as to reduce the friction loss. Rolling Guide bar rollers is generally composed of inner ring, outer ring, rolling element and cage. The function of inner ring is to match with the shaft and rotate with the shaft; the function of outer ring is to match with the Guide bar rollers seat and play a supporting role; the rolling element distributes the rolling element evenly between the inner ring and outer ring with the help of cage, and its shape, size and quantity directly affect the service performance and service life of rolling Guide bar rollers The cage can make the rolling elements evenly distributed, guide the rolling elements to rotate and play a lubricating role.

effect

The rolling Guide bar rollers has the advantages of convenient maintenance, reliable operation, good starting performance and high Guide bar rollers capacity at medium speed. Compared with sliding Guide bar rollers, rolling Guide bar rollers has larger radial dimension, poor damping capacity, low service life and larger noise at high speed.

structure

The structure of rolling Guide bar rollers consists of two parts

1. Outer ring - installed in the Guide bar rollers seat hole, generally does not rotate

2. Inner ring -- it is installed on the journal and rotates with the shaft

3. Rolling element -- the core element of rolling Guide bar rollers

4. Cage - evenly separate the rolling elements to avoid friction

Lubricant is also considered to be the fifth largest part of rolling Guide bar rollers, which mainly plays the role of lubrication, cooling and cleaning

features

1. Specialization

In the processing of Guide bar rollers parts, a large number of Guide bar rollers special equipment are used. Such as ball grinding machine, grinding machine and other equipment. The characteristics of specialization are also reflected in the production of Guide bar rollers parts, such as the steel ball company specializing in the production of steel balls, the micro Guide bar rollers factory specializing in the production of micro Guide bar rollerss, etc.

2. advanced nature

Due to the large-scale requirements of Guide bar rollers production, it is possible to use advanced machine tools, tooling and technology. Such as CNC machine tools, three jaw floating chuck and protective atmosphere heat treatment.

3. Automation

The specialization of Guide bar rollers production provides conditions for its production automation. In production, a large number of automatic, semi-automatic special and non special machine tools are used, and the automatic production line is gradually applied. Such as automatic heat treatment line and automatic assembly line.

Basic characteristics

advantage

1. Low friction resistance, low power consumption, high mechanical efficiency, easy to start;

2. Standardized size, interchangeability, easy installation, disassembly and maintenance;

3. Compact structure, light weight and smaller axial dimension;

4. High precision, large load, small wear and long service life;

5. Some Guide bar rollerss have the function of self-aligning;

6. It is suitable for mass production with stable and reliable quality and high production efficiency;

7. The friction torque of transmission is much lower than that of hydrodynamic Guide bar rollers, so the friction temperature rise and power consumption are lower;

8. The starting friction torque is only slightly higher than the rotating friction torque;

9. The sensitivity of Guide bar rollers deformation to load variation is less than that of hydrodynamic Guide bar rollers;

10. Only a small amount of lubricant is needed for normal operation, which can provide lubricant for a long time;

11. The axial dimension is smaller than that of traditional hydrodynamic Guide bar rollers;

12. It can bear both radial and thrust loads;

13. In a large load speed range, the unique design can obtain excellent performance;

14. The Guide bar rollers performance is relatively insensitive to the fluctuation of load, speed and running speed.

shortcoming

1. It's noisy.

2. The structure of Guide bar rollers pedestal is complex.

3. The cost is high.

4. Even if the Guide bar rollerss are well lubricated, installed correctly, dustproof and moistureproof, and operate normally, they will eventually fail due to the fatigue of the rolling contact surface.

performance

Alignment

performance

When the axis center line is inclined to the center line of the Guide bar rollers seat hole, the Guide bar rollers can still work normally. Double row radial spherical ball Guide bar rollers and double row radial spherical roller Guide bar rollers have good self-aligning performance. Roller Guide bar rollers and needle roller Guide bar rollers are not allowed to have relative inclination of inner and outer ring axes. For example, single row radial ball Guide bar rollers is 8 ′～ 16 ′, double row radial spherical ball Guide bar rollers is 2 ～ 3 ° and tapered roller Guide bar rollers is ≤ 2 ′.

Limit speed the maximum speed allowed by the Guide bar rollers under certain load and lubrication conditions. The limit speed is related to Guide bar rollers type, size, accuracy, clearance, cage, load and cooling condition. The working speed of the Guide bar rollers should be lower than the limit speed. Using high precision Guide bar rollers, improving cage structure and material, using oil mist lubrication and improving cooling conditions can increase the limit speed.