Home>Bearing knowledge> The reason for the high temperature of the cryogenic low pressure expansion machine bearing (2)

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The reason why the temperature of the cryogenic low pressure expansion machine is too high (2)

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4.2 Check the test target, temperature and pressure of the smooth oil of the fuel tank. The main factors affecting the bearing temperature in the smooth oil test target are kinematic viscosity and lightning. When the kinematic viscosity is higher than the standard value; the movement resistance of the oil film between the journal and the bearing is large. The heat generated by the movement cannot be taken away in time; the temperature of the bearing of the low-pressure expansion machine is high, and the kinematic viscosity is less than the standard value; the thickness of the oil film between the journal and the bearing is changed.粒 淮 钡 钡 钡 钡 钡 蚴 蚴 蚴 蚴 蚴 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝 谝ㄐ 捎湍せ蛐 捎湍せ蛐 傻 傻 傻 湍け浔 湍け浔 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 嵊胫岢 . . . . The normal tank temperature is 58 ° C); the heat transfer area of ​​the smooth oil water cooler is inevitable; the temperature of the smooth oil is correspondingly higher; the temperature of the bearing of the low pressure expander is increased; the pressure of the tank pressure on the bearing temperature; the pressure of the tank Too high; directly affects the speed of the smooth oil return tank; this Swell also easy to form a low pressure machine thus bearing temperature; To ensure a low pressure inflated machine bearing temperature is not high; it is necessary to control the lubricating oil well test objectives, the tank temperature and pressure.
4.3. Smooth oil-water cooler heat transfer expansion machine Smooth oil-water cooler is a randomly introduced heat exchanger with a heat exchange area of ​​34m2. The copper material is controlled by the control. The heat transfer of the copper material is better than other raw materials. Water, the temperature of the incoming/returning water is 30/60 °C; the shell-side medium is smooth oil; the temperature of the inlet/out smooth oil is 60/40 ° C. The temperature of the incoming water is high; after the heat exchange by the water cooler; the temperature of the smooth oil The temperature of the bearing of the low-pressure expansion machine is increased. The heat transfer effect of the smooth oil-water cooler; because the water cooler is used for a long time; the fouling of the pipe wall; the blockage of the muddy sand and the water cooler have poor heat exchange; The temperature of the expansion machine bearing is high. It is ensured that the smooth oil-water cooler is cleaned regularly; the other circulating water is controlled by the power; the water temperature is controlled within 30 °C.
4.4 View the operating parameters of the oil pump The flow rate of the oil pump is 216L/min, the inlet pressure is 0. 5MPa, and the outlet pressure is 4.86MPa. If the outlet pressure of the oil pump is low; the oil supply of the oil pump is lacking; the smooth oil circulation is slowed down; Smooth oil can not work normally; can not be satisfied with the smoothness of bearing and seal; easy to form bearing high temperature. This condition may be caused by oil pump seal damage; large amount of leakage; or oil pump inlet filter gas blockage; or pump impeller Damage caused; after the inspection of the on-site oil pump outlet pressure is 4. 5MPa; satisfied with the expansion of the machine operation requirements.

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