Installation and maintenance of bearings
From a usage perspective, the following points should be noted to ensure reliable operation of bearings:
1. Improve lubrication quality, control oil pressure, temperature, and flow rate, and strengthen oil filtration.
2. Use fuel and lubricating oil that meets regulations.
3. Controlling the temperature state of the diesel generator set is detrimental to working under conditions of supercooling and overheating. In cold weather, the diesel engine should be preheated before starting and the crankshaft should be manually turned to allow the oil to enter the friction surface.
4. The surface quality and geometric shape of bearings and journals should be strictly guaranteed.
5. The bearing clearance should be appropriate. If the generator set is too large, it will cause impact, while if it is too small, it will result in poor lubrication and possible burning of the bearing.
How to ensure the reliable operation of bearings
Generally speaking, from a usage perspective, the following points should be noted:
1. The bearing clearance should be appropriate. If it is too large, it will cause impact, while if it is too small, it will result in poor lubrication and possible burning of the bearing;
2. The surface quality and geometric shape of bearings and journals should be strictly guaranteed;
3. Improve lubrication quality, control oil pressure, temperature, and flow rate, and strengthen oil filtration;
4. Use fuel and lubricating oil that comply with regulations.
In order to fully utilize and maintain the expected performance of bearings for a long time, it is necessary to effectively carry out regular maintenance (regular inspections). It is important to detect faults early and prevent accidents from happening before they occur through appropriate regular inspections, in order to improve productivity and economy.
install
The correct installation of bearings affects accuracy, lifespan, and performance. Therefore, the design and assembly departments should conduct thorough research on the installation of bearings. I hope to install according to the operating standards. The items for homework standards are usually as follows:
(1) Clean bearings and bearing related components
(2) Check the dimensions and precision machining of related components
(3) Installation
(4) Inspection after installation of bearings
(5) Supply lubricant
I hope to open the bearing packaging shortly before installation. Generally lubricated with grease, without cleaning, directly filled with grease. Lubricating oil lubrication is not necessary for regular cleaning, but for instrument or high-speed bearings, clean them with clean oil to remove rust inhibitors applied to the bearings. Bearings without rust inhibitors are prone to rust, so they cannot be left unattended. Furthermore, bearings that have been sealed with lubricating grease can be used directly without cleaning.
The installation method of bearings varies depending on the structure, fit, and condition of the bearings. Generally, due to the fact that most bearings rotate around the shaft, the inner ring requires an interference fit. Cylindrical hole bearings are often pressed in with a press or hot assembled. In the case of a tapered hole, it can be directly installed on the tapered shaft or installed with a sleeve.
When installing to the casing, there is usually a lot of clearance fit, and the outer ring has interference. Usually, a press is used to press it in, or there is also a cold shrink fit method for installation after cooling. When dry ice is used as a coolant and cold shrink is used for installation, moisture in the air will condense on the surface of the bearing. So, appropriate rust prevention measures are needed.
Maintenance and upkeep
disassembly
The dismantling of bearings is a regular maintenance process, which is carried out during bearing replacement. After disassembly, if it is necessary to continue using or check the condition of the bearings, the disassembly should also be carried out with the same care as during installation. Pay attention not to damage the various parts of the bearing, especially the disassembly of interference fit bearings, which is difficult to operate.
Designing and making disassembly tools as needed is also crucial. During disassembly, study the disassembly method based on the drawings
1. Improve lubrication quality, control oil pressure, temperature, and flow rate, and strengthen oil filtration.
2. Use fuel and lubricating oil that meets regulations.
3. Controlling the temperature state of the diesel generator set is detrimental to working under conditions of supercooling and overheating. In cold weather, the diesel engine should be preheated before starting and the crankshaft should be manually turned to allow the oil to enter the friction surface.
4. The surface quality and geometric shape of bearings and journals should be strictly guaranteed.
5. The bearing clearance should be appropriate. If the generator set is too large, it will cause impact, while if it is too small, it will result in poor lubrication and possible burning of the bearing.
How to ensure the reliable operation of bearings
Generally speaking, from a usage perspective, the following points should be noted:
1. The bearing clearance should be appropriate. If it is too large, it will cause impact, while if it is too small, it will result in poor lubrication and possible burning of the bearing;
2. The surface quality and geometric shape of bearings and journals should be strictly guaranteed;
3. Improve lubrication quality, control oil pressure, temperature, and flow rate, and strengthen oil filtration;
4. Use fuel and lubricating oil that comply with regulations.
In order to fully utilize and maintain the expected performance of bearings for a long time, it is necessary to effectively carry out regular maintenance (regular inspections). It is important to detect faults early and prevent accidents from happening before they occur through appropriate regular inspections, in order to improve productivity and economy.
install
The correct installation of bearings affects accuracy, lifespan, and performance. Therefore, the design and assembly departments should conduct thorough research on the installation of bearings. I hope to install according to the operating standards. The items for homework standards are usually as follows:
(1) Clean bearings and bearing related components
(2) Check the dimensions and precision machining of related components
(3) Installation
(4) Inspection after installation of bearings
(5) Supply lubricant
I hope to open the bearing packaging shortly before installation. Generally lubricated with grease, without cleaning, directly filled with grease. Lubricating oil lubrication is not necessary for regular cleaning, but for instrument or high-speed bearings, clean them with clean oil to remove rust inhibitors applied to the bearings. Bearings without rust inhibitors are prone to rust, so they cannot be left unattended. Furthermore, bearings that have been sealed with lubricating grease can be used directly without cleaning.
The installation method of bearings varies depending on the structure, fit, and condition of the bearings. Generally, due to the fact that most bearings rotate around the shaft, the inner ring requires an interference fit. Cylindrical hole bearings are often pressed in with a press or hot assembled. In the case of a tapered hole, it can be directly installed on the tapered shaft or installed with a sleeve.
When installing to the casing, there is usually a lot of clearance fit, and the outer ring has interference. Usually, a press is used to press it in, or there is also a cold shrink fit method for installation after cooling. When dry ice is used as a coolant and cold shrink is used for installation, moisture in the air will condense on the surface of the bearing. So, appropriate rust prevention measures are needed.
Maintenance and upkeep
disassembly
The dismantling of bearings is a regular maintenance process, which is carried out during bearing replacement. After disassembly, if it is necessary to continue using or check the condition of the bearings, the disassembly should also be carried out with the same care as during installation. Pay attention not to damage the various parts of the bearing, especially the disassembly of interference fit bearings, which is difficult to operate.
Designing and making disassembly tools as needed is also crucial. During disassembly, study the disassembly method based on the drawings
