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How To Use Lubricant？
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07/11/2023- Manual oiling device
The operator uses an oil pot or oil gun to add oil to the oil hole, oil nozzle and oil cup of the lubrication point, which is called manual oil lubrication. It is mainly used for low speed, light load and intermittent working sliding surfaces, open gears, chains and other individual parts. Friction pair. The amount of refueling is controlled based on workers’ feelings and experience.
- Oil dripping lubrication
Dripping oil lubrication mainly uses an oil cup to supply oil to the lubrication point. Commonly used oil cups include: needle valve oil cup, pressure drip oil cup, etc. The oil cup is mostly made of light metal such as aluminum or aluminum alloy with a frame, and the inspection hole on the cup wall is mostly made of transparent plastic or glass so that the internal oil level can be observed.
1) Needle valve oil filling cup
The amount of oil dripping from this oil filling cup is controlled by the needle valve. The oil level in the oil cup can directly affect the amount of oil dripping through the annular gap of the needle valve.
2) Pressure dripping oil cup
There is a needle valve on the bottom of this oil cup, and its valve stem extends out of the operating cylinder on the oil cup to connect the external adjustment nut. The opening and closing of the valve is controlled by the exhaust of the compressor through the piston pressed by the spring, and the nut on the valve stem can be used to adjust the amount of oil dripping from the oil cup.
3) Jump-pin lubricant cup
This kind of lubricating oil cup is generally installed directly on the friction pair. The slight vertical vibration of the friction pair produces a pumping effect, causing the oil hole to drop down and lubricate the friction pair.
4) Thermal expansion oil cup
This oil cup is controlled by the temperature change of the friction pair. The temperature change in the friction pair is transmitted to the upper chamber of the oil cup through the metal tube of the oil cup, causing the air in it to expand or contract. When the air expands, the air pressure in the cavity above the oil cup increases, forcing a small amount of lubricating oil to flow out of the oil cup and into the friction pair; when the air contracts, the oil flow stops, and it continues continuously. This kind of oil cup cannot be used in some situations where oil is required first and then the friction pair is started.
5) Continuous pressure oil cup
This kind of continuous pressure oil filling cup can ensure automatic and even oil supply because the oil reservoir below it can maintain constant oil pressure.
6) Drip oil evenly into the oil cup
The lubricating oil passes from the upper oil reservoir through the valve connected to the float and is replenished to the lower oil reservoir. The amount of oil sent to the friction pair is adjusted by the needle valve.
7) Piston type oil dripping cup
The amount of oil dripping can be adjusted through the lever mechanism on the cup.
- Oil rope and oil pad lubrication
The oil rope and oil pad lubrication method is to soak the oil rope, felt pad, etc. in the lubricating oil, and use siphon and capillary action to absorb the oil. The viscosity of the oil used should be lower. Oil ropes and oil pads have a certain filtering effect and can keep the oil clean.
Oil pad lubrication is generally used in bearings where oiling is difficult or inaccessible, but the speed of the lubricated surface should not be too high. The oil pad absorbs lubricating oil from a special oil storage tank and supplies it to the journal in contact with it. Oil pads are mainly made of rough felt. They should be cleaned and dried regularly before being reassembled for use.
- Oil ring or oil chain lubrication
Oil ring or oil chain lubrication can only be used for horizontally installed shafts. Hang an oil ring on the shaft, and the lower part of the ring is immersed in the oil pool. The friction force when the shaft rotates is used to rotate the oil ring and bring the lubricating oil. to the journal, and then spreads to various lubrication points on the surface of the journal. It should be noted that the rotating shaft should have no impact and vibration, and the rotation speed should not be too high.
- Oil bath and splash lubrication
Oil bath and splash lubrication are mainly used in closed gearboxes, chains and internal combustion engines. Generally, high-speed (not higher than 12.5m/s) rotating parts are used to bring oil from a specially designed oil pool to nearby lubrication points. Sometimes an oiled wheel is provided on the shaft to bring the oil to the journal. The oil pool used for splash lubrication should be equipped with an oil mark, and the oil level depth of the oil pool should be kept to a minimum of 2 to 3 tooth heights when the wheel is submerged. In order to facilitate heat dissipation, it is best to provide ventilation holes in the closed gear box to enhance the convection of air inside and outside the box.
- Pressure forced lubrication
Pressure forced lubrication is to set up a small lubrication pump inside the equipment and drive it through transmission parts or motors to supply lubricating oil from the oil pool to the lubrication point. The oil supply is intermittent, and it can be used for independent lubrication or several pumps combined together for lubrication.
During forced lubrication, the lubricating oil will be automatically supplied and stopped as the equipment starts and stops. The oil flow rate is adjusted by the plunger stroke, from a few drops per second to 1 drop per several minutes. The oil pressure range is 0.1~4MPa. In order to keep the lubricating oil clean, the oil pool should have a certain depth to prevent the sediment in the oil pool from being sucked in.
- Oil injection lubrication
Oil injection lubrication refers to a lubrication method in which lubricating oil and compressed air of a certain pressure are mixed in an injection valve and then sprayed to the lubrication point. The lubrication of gears requires lubricating oil to be sent from the meshing direction of the gear teeth to the meshing tooth gap under direct pressure for lubrication. For gears that rotate in both directions, injection hole pipes need to be installed on both sides of the gear. In worm gear transmission, the oil injection should be sprayed from the side of the worm spiral that meshes with the worm gear.
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