Gas turbomachinery bearings

Gas turbomachinery bearings

Tilting pad bearings,tilting pad journal bearings,journal bearings,tilting pad radial bearings

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Gas turbomachinery bearings Details

Gas turbines bearings are often subjected to high loads, high speeds and high temperatures, especially as capacity and efficiency demands increase.

To ensure optimum dynamic characteristics in specific operating conditions, BHS Bearings applies a variety of specialized design features to bearing solutions.

For medium turbines used plain journal bearing. They may be ring lubricated sleeve bearings with bronze or Babbitt lining. Both flooded and force types are employed.

For larger turbines, the radial bearing will be a tilting pad type. The number of pad per bearing will be selected based on the weight of the rotor. For these types of bearing forced lubrication is used.

The thrust bearing is located on the free end of the rotor or we can say at the steam inlet of the turbine. The axial thrust force is very small for impulse turbines. This is due to the presence of pressure equalizing holes in the rotor discs to balance the thrust force generated across the disc. A simple thrust bearing such as a radial babbitt facing on journal bearings are commonly used in small and medium-size turbines. Tilling pad type thrust bearings are used in the large gas turbines.

We provided journal bearing for gas turbine power from 300kw-50MW

About Us

Zhejiang BHS Journal Bearing Co., Ltd. is a professional Gas turbomachinery bearings Manufacturers and Gas turbomachinery bearings factory, has been focusing on slide bearing’s design, manufacture, experiment and fault diagnosis for many years, BHS has become an excellent supplier of solutions for sliding bearing systems in China.

The company has more than 50sets of precision CNC machining center, Babbitt alloy casting equipment, Babbitt alloy sprayer, heat treatment, and other equipment. The annual production capacity of 26,000 sets of slide bearings. Through continuous technological research, the company has the ability to manufacture various types of slide bearings.

Our company approved by ISO:9001-2015, ISO:14001-2015, ISO:45001-20018, Standardization Safty production Certificate, National High-Tech Enterprise certificate, Provincial High-Tech Enterprise certificate, Military supplier certificate and variety of patents 30 kinds.

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Industry Knowledge Expansion

Will the selection, usage and supply method of lubricant affect the vibration condition of gas turbine bearings?

Improper lubrication can cause increased friction in gas turbine bearings, which can cause vibration. The selection, usage and supply method of lubricant will all affect the vibration condition of the bearing.
In gas turbines, bearings are key components that support the rotating shaft and maintain its balance. Correct lubrication has an important impact on the normal operation and service life of bearings. Improper lubrication weakens the ability of the lubricating oil film and increases friction between bearing surfaces, causing vibration. This vibration will not only affect the working efficiency of the gas turbine, but may also cause bearing damage and failure.
Lubricant selection is one of the important factors affecting bearing vibration. A suitable lubricant should have good lubrication properties, stable chemical properties and low viscosity. Common lubricants include mineral oil, synthetic oil and hydraulic oil. According to the working environment and load conditions of gas turbine bearings, selecting the appropriate lubricant is the key to ensuring stable bearing operation.
Usage is also one of the important factors affecting bearing vibration. Using too much or too little lubricant can cause bearing vibration. Excessive lubricant will increase the lubricant pressure inside the bearing, causing unnecessary heat energy loss and lubricant leakage. Too little lubricant will not form enough lubricating oil film and increase the friction between bearings. Therefore, reasonable determination of the amount of lubricant used according to the load and working conditions of the bearing is an important measure to ensure stable bearing vibration.
The way the lubricant is supplied will also have an impact on the vibration of the bearing. Common lubricant supply methods include dripping, oil immersion and spraying. Different supply methods will affect the distribution of lubricant on the bearing surface and the lubrication effect. Correctly choosing the appropriate replenishment method can ensure that the lubricant is evenly distributed on the bearing surface, reducing friction and vibration.
The selection, usage and supply method of lubricant will all affect the vibration condition of gas turbine bearings. Appropriate lubricant, correct usage amount and reasonable replenishment method are key measures to ensure stable bearing operation. In order to ensure the normal operation of the gas turbine and extend the service life of the bearings, we need to pay attention to the lubrication work and conduct regular lubricant inspection and replacement.

Is it important to inspect the operation of gas turbine bearings on a daily basis?

As an important component of the gas turbine, gas turbine bearings carry the weight and rotational torque of rotating parts and ensure the smooth operation of the shaft system. Therefore, daily inspection of the operating status of the bearings is very important. Below we will introduce in detail the main contents of daily inspection of gas turbine bearings.
Inspection personnel need to observe whether the temperature of the bearing is normal. Bearing overheating is a common failure phenomenon. Excessive temperature will cause dehydration and oxidation of the lubricating oil inside the bearing, thereby increasing wear and friction. Therefore, inspection personnel need to use an infrared thermometer or contact thermometer to measure the temperature of the bearing to ensure that it is within the normal operating range.
Inspection personnel also need to pay attention to whether there are abnormal sounds and vibrations. Bearings should be quiet and vibration-free under normal operating conditions. If there are abnormal sounds, such as noises, squeaks or noises, or the bearings vibrate, this may be a sign of fatigue, wear or other failure of the bearings. Inspection personnel need to record and conduct further inspections and repairs in a timely manner.
Inspection personnel also need to check the oil level and oil quality of the bearing's lubricating oil. Lubricating oil plays an important lubrication and cooling role in bearings, so the normal operation of bearings requires maintaining proper lubrication conditions. Inspection personnel need to check the oil level of the lubricating oil to ensure that it is within the specified range to fully lubricate the bearings. At the same time, you also need to observe the color and cleanliness of the lubricating oil. If you find that the lubricating oil is turbid, smelly, or becomes black and thick, it may be that the lubricating oil is expired or contaminated and needs to be replaced in time.
In addition to the above main contents, inspection personnel also need to closely observe the operating conditions of the bearings and pay attention to the wear of the outer and inner rings of the bearings. Bearing wear and life are closely related. If the bearing is found to have obvious wear, scratches or cracks, it needs to be replaced or repaired in time.
The daily inspection of gas turbine bearings mainly includes observing the temperature of the bearing, checking the sound and vibration, checking the oil level and oil quality of the lubricating oil, etc. Through careful inspection and timely maintenance, the normal operation of gas turbine bearings can be ensured and their reliability and service life can be improved.

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