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Standard For Bearing Temperature Of Motor And Pump
Introduction Of Several Plastic Bearings
Introduction Of Several Plastic Bearings

Characteristics Of Deep Groove Ball Bearing

1. Structurally, each ring of deep groove ball bearing

has a continuous groove raceway with a cross section of about one-third of the circumference Groove Ball Bearing of the ball. It is mainly used to bear radial load and certain axial load.

2. When the radial clearance of the bearing increases,

it has the property of angular contact ball bearing and can bear the alternating axial Groove Ball Bearing load in two directions.

3. Low friction and high speed.

4. The utility model

has the advantages of simple structure, low manufacturing cost and Groove Ball Bearing high manufacturing accuracy.

5. Generally, stamping wave cage is adopted.

For bearings with inner diameter greater than 200mm or high-speed operation, turning solid cage is adopted. There are more than 60 variant structures of deep groove ball bearings.

Characteristics Of Deep Groove Ball Bearing

Introduction of several plastic bearings

1. Precision plastic bearing

Precision plastic bearings have improved precision and tolerance compared with traditional plastic bearings. The inner and outer rings, rolling elements and cages are made of materials suitable for precision machining. On the basis of maintaining the traditional advantages of plastic bearings, they can be applied to precision and high-speed operation conditions.

Generally, the inner and outer rings are made of POM, PPS or peek, the cage is made of glass fiber reinforced nylon 66 (rpa66-25), or peek, and the rolling body Groove Ball Bearing is made of glass ball, stainless steel ball or ceramic ball.

2. Corrosion resistant plastic bearing

There are a variety of material solutions for Groove Ball Bearing different application conditions, which can operate freely even in severe acid / alkali / salt / solvent / oil / gas / seawater erosion, ensuring ideal durability and expected life.


3. Acid alkali resistant plastic bearing

HDPE, PE and UHMWPE materials have been proved to be used in relatively weak acid-base cross environment (30% CuCl2 solution and 30% NaOH solution test OK). PVDF and PTFE materials can be used in strong acid and strong alkali environment. Deep Groove Ball Bearing Groove Ball Bearing PTFE can be used in all concentrated acid and concentrated alkali occasions, including HF and fuming sulfuric acid and nitric acid (more than 98%)

4. High temperature resistant plastic bearing

PVDF, PTFE (Teflon), PPS (polyphenylene sulfide), Peek (polyether ether ketone), PI (polyetherimide) have proved to be ideal materials for making high-temperature plastic bearings. Groove Ball Bearing PI can be used in the environment with a long-term temperature of 290 ℃ and a short-term temperature resistance of 350 ℃. Deep Groove Ball Bearing It is one of the medium and high-temperature properties of all known engineering plastics.

5. Plastic bearing pedestal and plastic outer spherical bearing

Plastic bearing with seat is unique, light in weight, easy to install, corrosion-resistant and maintenance free. At the same time, Deep Groove Ball Bearing it has vibration damping and impact resistance that common cast iron seat or stamping seat does not have. With the continuous development of Groove Ball Bearing new materials, they are more and more widely used in engineering.

You must have different understanding

about the knowledge of sum frequency and difference frequency. Now we will explain the contents of sum frequency and difference frequency of rolling bearing. A Deep Groove Ball Bearing component fault → fault deterioration → knowledge causing it, it is component fault → fault frequency of other components. The addition Groove Ball Bearing and subtraction of frequencies will not only produce the fundamental frequency of a fault frequency. When there is a fault, the fault frequency is likely to exist in the form of sidebands of other existing frequencies.

For example,

bearing cage fault frequency FTF generally does not appear at the fundamental frequency of about 0.35x ~ 0.45X speed frequency, but the sideband of BSF, bpor and bpir fault frequency, and can even be modulated into a new frequency with other vibration sources. If there is a single fault on the bearing outer ring or bearing inner ring, there will only be a single bearing outer ring or bearing inner ring fault frequency (bpor or bpir). When there are multiple faults around him, there will be many harmonic frequencies of the bearing outer ring or bearing inner ring fault frequency (bpor or bpir).

With the expansion

of bearing inner ring and outer ring faults, the better indicators of fault deterioration are the number of harmonic frequencies of bearing fault frequency and the side band of 1x speed frequency on both sides of bearing outer ring or bearing inner ring fault frequency. In the fault frequency analysis of rolling bearing, the emphasis is not the amplitude, but the frequency component in the frequency spectrum. Especially when the defects of bearing inner ring or bearing outer ring begin to expand.

Pay attention to the number of harmonic frequencies of bearing fault frequency, accompanied by 1x sideband. The bearing fault continues to worsen, the modulation continues, and the impact Deep Groove Ball Bearing becomes greater and greater until the spectrum becomes the harmonic frequency of 1x speed frequency.

For self-aligning double row bearings

with oscillating rolling elements, two groups of bearing fault frequencies can be generated: (a) only one side of the inner ring or outer ring, calculate the fault frequency with a single row of rollers; (b) if the defect occurs on both sides of the outer ring Deep Groove Ball Bearing or inner ring of the bearing, calculate the fault frequency with the total number of rolling elements.

It is difficult to diagnose a single fault of a rolling element on the bearing inner ring only from the spectrum, because its amplitude is often very small, and there is no discrete spectrum line at the calculated fault frequency. Therefore, in addition to the vibration spectrum itself, the time domain waveform Deep Groove Ball Bearing should also be studied.

In rolling bearings, when there are speed harmonic frequencies, they may be signals of bearing Looseness on the shaft or in the bearing seat, or more importantly, Deep Groove Ball Bearing they may be signals of bearing rotation on the shaft or in the bearing seat.

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