Industrial Heating Furnaces Only Use Spherical Roller Bearings

Time：2020.08.24  Source：Roller Bearings Suppliers

The wheel equipment of industrial furnace and heating furnace. The furnace referred to here is only for steel forging. The largest number of heating furnaces and annealing furnaces is the trolley type, so there are several trolleys for each trolley. Wheel equipment composition.

1. Why use spherical roller bearings in wheel bearings

(1) When the trolley is walking, the wheel speed is slow, about 6 or 7 meters per minute. Relatively speaking, the bearing speed is a bit slow.

(2) The trolley has no side wheels and single side wheels. The structural design of the single-sided wheel is composed of a single-sided convex edge and an angle iron groove on the track. The unique feature of using spherical roller bearings is that the road surface will be uneven and smooth when small cars are running normally. Self-aligning bearings have two rows of symmetrical spherical rollers. There is a common spherical roller table in the outer ring, and the inner ring has two roller tables with a certain inclination angle to the bearing shaft, which has a good centering effect. When bending or uneven installation, the bearing can still be used normally.

(3) Spherical roller bearings are relatively cheap and cost-effective.

(4) In addition to bearing radial load, spherical roller bearings can also bear bidirectional axial loads. WSBC 22216 CC/W33 bearings online , pls click here :

2. Basic knowledge of radial force and axial force extension of spherical roller bearings

Spherical roller bearings bear the difference between axial load and radial load. The axis refers to the central axis, and the diameter is the diameter. Spherical roller bearings: In addition to bearing radial loads, they also bear bidirectional axial loads.

3. How to lubricate the spherical roller bearings in the wheel shaft

The trolley-type heating furnace consists of wheels, with wheels on the outside, and a hole in the middle for bearings, shafts and spacers. It is composed of two spherical roller bearings. Spacers are used between the bearing and the bearing. For lubrication in the wheel to the bearing, drill a hole in the middle of the shaft to half the distance, drill a hole on the radial shaft, and use an external oil cup to refuel.

4. Frequently Asked Questions about Spherical Roller Bearing Rings

The bearing ring raceway is the surface of the bearing workpiece, and its quality will directly affect the working performance and service life of the bearing. In the course of use, we will often find some common quality problems on the surface of bearing rings. How do such quality problems arise? Based on years of experience, Wuxi Spark Bearing Co., Ltd will tell you the common quality problems and causes of spherical roller bearing ring surfaces. WSBC 22222 CC/W33 bearings online , pls click here :

(1) The surface roughness is not good

Causes: insufficient super-finishing time, too high pressure of the grindstone, relatively high vibration frequency of the grindstone, and too low speed of the fine super-finishing workpiece.

(2) Superfinished particles

The convex particles of different sizes and shapes formed on the machined surface after super-finishing are mainly due to the grinding particles sintered on the machined surface under the action of instantaneous high temperature and high pressure. Its existence increases the vibration value of the bearing and reduces The service life of spherical roller bearings is improved.

Cause: The grinding stone pressure is too high. The surface roughness value before superfinishing is too high, the workpiece speed is too high, the cutting lubricating fluid is not sufficiently cooled, and the remanence of the bearing ring grinding is too large.

(3) Silk

Net-like scratches on the processed surface after super finishing.Causes: Too many impurities in the grinding stone and uneven particle size; impurities in the cutting fluid and insufficient flushing.

(4) Comet marks

During the super-finishing process, due to the individual relatively large diamond particles falling off or blocking the depressions on the surface of the workpiece, comet marks are formed with the super-finishing pressure and the rotation of the workpiece.Cause: Choose the grindstone correctly and reduce the pressure of the grindstone.

(5) Grinding wheel flower

Causes: The grinding wheel is too thick during surface grinding, the workpiece speed is too high during rough and super finishing, the rough and super finishing time is too short, the grinding stone pressure is too small during rough and super finishing, and the grindstone swing angle is too small.

(6) The axial movement of the end face is too large

Cause: The eccentricity of the workpiece is too small, resulting in unstable rotation of the workpiece, large radial circle runout, the center of grindstone swing and the center of curvature of the workpiece raceway do not coincide, there is debris on the end face supporting surface when the workpiece is positioned, causing the end face to move axially The momentum is too large, the geometric accuracy of the grinding process is not good, and the workpiece has been repaired many times.

(7) Poor roundness and waviness

Cause:

a. The workpiece eccentricity is too small;

b. The speed of the fine and super finishing workpiece is too large, causing the machine tool to vibrate;

c. The width of the grindstone is not enough and the wrap angle is too small;

d. When the roller is positioned, the supporting angle is too small to drive the ferrule to rotate normally;

e. The roundness and ripple of the grinding process are too large.

(8) The curvature of the spherical roller bearing raceway is not good after super finishing.Cause: The swing center does not coincide with the curvature center of the raceway, the width of the grindstone is too large, and the wrap angle is too large.