Classification and performance of gear oil, application of common problems and troubleshooting methods
1) Classification of gear oil
Specification, quality requirements and precautions of gear oil
1crb industrial gear oil
2ckc medium load industrial gear oil
3ckd heavy duty industrial gear oil
4cke worm gear oil
5ckh ordinary open gear oil
6ckj extreme pressure open gear oil
7ckm solvent diluted open gear oil
2) Characteristics of gear oil
1. The equivalent curvature radius of the gear is small: the tooth faces sliding, which is very easy to cause Scratch and wear.
2. The contact pressure of gear is very high: 400-100mpa, hyperbola up to 3000 MPa, which is very easy to pitting and gluing.Classification and performance of gear oil, application of common problems and troubleshooting methods
3 intermittent lubrication: whenever the oil film is re established during meshing, it is in a mixed friction state, which is easy to cause gluing and wear.
4 the viscosity of lubrication, oil supply mode, oil performance and oil supply have an important impact on gear failure.
3) Requirements for gear oil
1 appropriate viscosity number
2 good oxidation stability
3. Good anti-wear and bearing performance
4 good anti foam performance
5. Good anti rust and anti-corrosion performance
6 good demulsibility
7 good shear stability
4) Selection of gear oil
5) Brief introduction of foreign famous brand gear oil
1 Mobil gear oil 600 Series (mineral)
It is equivalent to CKD series of heavy-duty gear oil in China, which is divided into 8 models:Classification and performance of gear oil, application of common problems and troubleshooting methods
626（68）， 627（100）， 629（150）， 630（220），
632（320）， 633（ ）， 634（460）， 636（680），
Pour point (- 23 ~ – 7 ℃), flash point (204-230 ℃), viscosity index 95
2 Mobil XMP series gear oil
It is a high-performance mineral oil gear oil, which has a longer service life than traditional mineral oil. Control cleanliness through filter
Points: xmp6810015022032040680, several grades
The pour point is (- 27 ∽ – 9 ℃), the flash point is (255 ∽ 230 ℃), and the index is 95
Pressure resistant gear oil
Equivalent to CKD of heavy-duty industrial gear oil in China
Excellent thermal stability, oxidation resistance, resistance to oil sludge, can also prolong the service life of oil at 100 ℃, and has good water separation, foam resistance and anti-corrosion (especially in coastal humid environment),
Score: 68100150220320460680, several grades
The pour point is (- 24 ∽ – 9 ℃), the flash point is (229-224 ℃), and the viscosity index is (103-82)
Purple crown mineral oil-free products
② Oil forming modulation
(1) Mobil SHC 600 Series
Synthetic oil modulation, good oxidation stability, excellent anti rust and anti-corrosion. It is also stable under water containing conditions, with excellent low-temperature fluidity, higher service life than mineral oil and wide application range.
Gear and industrial bearing lubrication, especially high temperature, short life and frequent replacement system.
The pour point is – 54 ∽ – 15 ℃, the flash point is 240 ℃ – 270 ℃, and the viscosity index is 159-164.
(2) Mobil SHC synthetic Super Series
Modulated by synthetic hydrocarbons. Designed to seal gears under extreme temperatures and heavy loads. It contains extreme pressure and anti-wear additives. It is recommended to lubricate all closed gears within the range of – 34 ℃ and 121 ℃.
Points: SHC 150220320460680 several grades
The viscosity index is between 148-162
(3) Mobil gegao 22.30 series
It is polyethylene glycol lubricating oil, which is suitable for sliding bearings, gearboxes and air compressors that cannot be lubricated with mineral oil under harsh conditions. Highly oily, stable oxidation, reducing oil sludge deposition, soluble with most seals and insoluble with mineral oil.
The grid height is 22 (150) and 30 (220)
The pour point is between – 2219 ℃ and 181 ℃.
(4) Mobil gegao he series (worm gear)
It is a high-efficiency worm gear. Add polyethylene glycol base fluid to reduce friction heat. However, it will absorb moisture and cannot be separated from water, so it should be kept dry. It is: Mobil gegao he 2203204606801000.
Pour point – 46-35 ℃, flash point 280 ℃ – 284 ℃, index 220-278.
(5) Shell pressure resistant HD gear oil
Synthetic gear oil has far superior performance than mineral oil. It is suitable for closed gearbox with heavy load, high temperature and large temperature change, lifelong lubrication system, lubrication of rolling and lubricating bearings, oil for circulating system, excellent rust prevention, corrosion prevention, thermal stability and long life at high temperature.
Points: hd220320 and 460
The pour point is – 48 ℃ ∽ – 42 ℃, and the index is 148-155.
(6) Shell pressure resistant, RL Series synthetic gear oil is suitable for harsh working conditions, bearing and gear lubrication, sliding and rolling shaft medium load lubrication, excellent thermal stability and oxidation stability, prevent the generation of high-temperature harmful materials, and improve the cleanliness of the system.
Sub: RL, 1502203204606801000
The pour point is – 54 ℃ ∽ – 36 ℃, and the flash point is 236 ∽ 286 ℃. Index 149-167
(7) Shell Davina synthetic worm gear oil
Synthetic oil is the base oil, with anti oxygen and anti rust. It is especially suitable for the rotation of copper steel heavy-duty worm gear. When the temperature reaches 200 ℃, it can be used normally. It is immiscible with paint mineral oil, with high index, good shear stability and very long service life. It can be lubricated for life to reduce the maintenance cost.
Points: wa150, wb220, sc320, sp460,
The pour point is – 30 ∽ – 40 ℃, the flash point is 268 ∽ 234, and the index is 200-244.
Synthetic oil plus advanced additive synslade is suitable for overweight load impact. Gear, worm gear, coupling, guide rail and chain under operating conditions, with special anti extreme pressure impact performance. Reduce energy consumption, oil temperature, excellent water resistance, anti emulsification and anti rust. It is miscible with 100% mineral oil and most synthetic oils, but not with silicone oil and ethylene glycol.
Points: 32, 46, 6810015022032046068010001500.
The pour point is – 49 ~ – 29 ℃, the flash point is 177 ~ – 216 ℃, and the index is 107-108
OK load 100 + pounds, FZG test level 12, four ball sintering 400kg
(9) High efficiency industrial gear oil (synrgy)
Synthetic oil plus advanced additives synslade extreme pressure load impact, pause start, slow operation, strong chemical hard film, suitable for all kinds of gear lubrication under all kinds of harsh conditions. It is suitable for stable and long-term effective operation under various loads, speeds and powers that other EP extreme pressure gear oils are not competent for.
Significantly extend the oil change period. Generally, the oil change period of gear oil is 2500 hours, while that of purple oil can reach 15000 hours, which is more than 6 times longer. Keep the gear oil tank clean at high temperature, clean and demulsify, and will not stop due to emulsification. Excellent compatibility with mineral oil and most synthetic oils, as well as seals. High environmental requirements.
ISO 68 100 150 220 320 460 680 1000
2EP 3EP 4EP 5EP 6EP 7EP 8EP 8AEP
Pour point – 40 ~ – 32 ℃, flash point 216 ~ 232 ℃, index 119-114
OK value LB 100 +, fzg12, four ball sintering load 400kgf
(10) Open gear guara XP dry film gear oil is specially designed for heavy-duty industrial gears and chains in dusty and harsh environments. With the solvent as the carrier, it is convenient to spray and dry the tooth surface. When the solvent evaporates, a layer of extremely tough dry film as smooth as wax is left, which can greatly reduce the abrasive dust and concentrate on the tooth surface. Classification and performance of gear oil, application of common problems and troubleshooting methods
The film is durable for a long time without frequent brushing, and the working temperature can reach 204 ℃. At the same time, it can protect the tooth surface from acid corrosion. This product forms calcium carbonate and calcium sulfate after evaporation. It is a natural mineral and will not cause pollution.Classification and performance of gear oil, application of common problems and troubleshooting methods
(11) Thermol tuff
Specially designed for low speed and high load in seawater and humid environment. Open gear, slide rail, shaft sleeve, bearing, chain and steel rope system. The wheel surface is used for high temperature and slow running, and the bearing will not be extruded. Classification and performance of gear oil, application of common problems and troubleshooting methods
This product is made of blending agent and advanced additive sinslade. It can be brushed with a brush or an automatic refueling system, but don’t overdo it to avoid waste. Due to its high consistency, it is not suitable for application in dusty sand environment. High hydrophobicity, soluble in 100% mineral oil and most synthetic oils. But it is insoluble in silicone oil and ethylene glycol oil. It is semi fluid.
ISO points: 100 (4800), 200 (8800), 300 (17000)
Pour point – 7 ~ 2 ℃, four ball sintering 400 + KGF/
OK value LB 100+
(12) High efficiency worm gear oil (synergy. Worm gear oil)
Special effect worm gear oil (thermol – Glyde le. Worm gear oil)
One is semi synthetic oil and the other is synthetic oil
It can resist extreme pressure load and instantaneous impact load during startup. The high temperature during gear engagement can reach 204 ℃, and it is used for lubrication requirements of various metals (copper and steel).Classification and performance of gear oil, application of common problems and troubleshooting methods
The difference between the two is that first, the high efficiency is used in general, while the special effect is applicable to medium and low speed, heavy load, strong vibration, impact and harsh working conditions. It has excellent oil-water separation and special rust prevention. The high efficiency is divided into 4606801000, the special effect is divided into 4606801000, and the index is 105-1266.Classification and performance of gear oil, application of common problems and troubleshooting methods
It is prepared with compound lithium saponified synthetic oil and advanced sinslade extremely tough oil film. The OK value is up to 100 pounds. It has excellent oxidation resistance, effective rust prevention, corrosion prevention, high temperature resistance, dropping point of 272 ℃, consistency grade 0. It is suitable for low-speed, high load and impact load gearbox lubrication. It is used in steel mills, paper mills and offshore equipment.Classification and performance of gear oil, application of common problems and troubleshooting methods