Classification of "smooth grease for low noise sealed imported bearings"

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Classification of "smooth grease for low noise sealed imported bearings"

Source: China Bearing Network Time: 2013-02-28
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1. General low-noise motor imported bearing smooth grease in the imported bearing profession; this smooth grease is the largest application; about 70% of the total fat. Because this kind of smooth grease is made of soft, simple filtered lithium soap. Chemical agent; the use of mineral oil as the base oil; very simple to meet the demand for lower and lower grades of imported bearings to reduce the oscillation value. Another advantage is the outstanding pumping; whether it is mechanical fatliquoring; still crafting grease; are simple and easy And; the smooth grease is cheap; it can greatly reduce the cost of imported bearings. However, because of the use of mineral base oil; such smooth grease is greatly reduced in some physical and chemical indicators other than rust and rust prevention functions, such as imported bearings The lifespan can only reach 200 hours; the starting and working torques are difficult to test at -20 °C. The smooth grease application temperature is usually -20 ~ 120 ° C; when used above 150 ° C high temperature; will show the base oil transpiration Too fast; loss of severe appearance; greatly shorten the life of imported bearings.
2. Low-temperature high-speed imported bearings smooth grease; equipment using fine imported bearings is becoming more and more refined; it is necessary to promote the smooth grease used in imported bearings to have the following functions:
.1) Have the same working life as imported bearings; extend the protection period as much as possible; shorten the stop time; improve labor productivity.
.2) Under the high speed of dn>5×105, ensure that the temperature rise of the motor is low; do not lick the oil; then reduce the power consumption;
.3) Its impurity content is controlled under certain specifications; it minimizes the pollution of equipment noise to the environment.
.4) Ensure the flexibility of starting and operating of imported bearings under ultra-low temperature operation conditions; ensure minimum output power.
The foreign smooth fat company selects high-purity chemical synthetic oil and some unique additives; develops and produces smooth grease for low-temperature high-speed imported bearings in high-purity environment and equipment. The defects of this kind of smooth grease are; °C application; with the increase of temperature, its life rate drops sharply; the load and impact can be weak; it should be prevented from being used on medium and large imported bearings; in order to prevent sintering due to smooth gap.
3. High temperature and longevity number Low noise imported bearings Smooth grease used in high temperature and high speed environment should have the following characteristics:
.1) not lost at high temperature; that is, adhere to a certain consistency at a temperature of about 180 ° C; does not soften.
.2) Grease leakage is less. When smooth grease is subjected to high-frequency repeated shearing and large centrifugal force in the imported bearing; smoothing can be returned to the raceway in time.
.3) Such smooth greases must have a certain high temperature service life; have good antioxidant capacity at high temperatures; then extend the life of imported bearings and associated equipment.
.4) has a certain mute effect; because the high temperature smooth grease fiber is usually harder; so the mute function in the imported bearing noise test is far less than the lithium based smooth grease.
High temperature and longevity number smooth grease is usually divided into two kinds; one is lithium complex grease; its high temperature function is better; but because of the participation of low molecular acid in the thickener crystal; the hardness of the fiber is added more; In the imported bearings, the oscillation function is poor. However, the degree of polymerization is manipulated; a kind of product with uniform molecular weight distribution is obtained; this kind of product is dispersed in the base oil by a unique method; another noise is made. Excellent smooth grease with the same function as high temperature.
The smooth fat has a uniform dropping point of more than 250 ° C; the operating temperature can reach about 200 ° C; the thickening agent crystal is not rich in metal ions; the fiber hardness is better than that; because of its fundamental chemical composition The thermal coupling effect; then the high temperature grease is cut. This high temperature, high speed, low noise smooth grease is not rich in any metal ions that can cause catalysis and oxidation; and the thickener rich in abundant nitrogen and oxygen atoms is also an anti- Oxide; so; imported bearings use life and sound quality are better.
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