How to Prevent Temperature Shock and Hydraulic Motor Damage
segunda-feira, 14 de setembro de 2020
Temperature shock can occur in hydraulic motors when there are temperature variances. Temperature variances are the result of the interior of the motor being a higher temperature than the outer housing components.
When a hydraulic system is operating, hydraulic fluid is being pumped through the system to drive the actuators in the circuit and keep internal parts lubricated and working correctly. Inside motors; the moving parts have very tight clearances between them.
If the fluid rapidly increases in temperature it can cause the internal components to expand faster than the external ones causing the motor to seize. This is an example of temperature shock.
One of the easiest solutions to address and prevent temperature shock is to heat up the outer motor housing so that it is also expanding at the same rate as the internal parts and components. This can be accomplished by installing a fluid injector to heat up the motor housing by releasing a small amount of hot hydraulic fluid, however this is complicated and does not address the problem of excessive circuit oil temperature.
If cooling; a fan type air, or water jacket type of cooler could be fitted on the return line to tank/reservoir, however it is important to match the cooling capacity to the heat that is required to be dissipated.
To prevent the oil from getting too hot and thereby stop heat build up and any chance of temperature shock the reservoir capacity needs to be matched to the amount of oil being pumped,. We also need to consider how long continuously the system is working, and what the ambient temperature of the area surrounding the reservoir is. If the power unit and reservoir is in a cool area then a storage capacity of three times the pumped flow/minute will normally be adequate, if inside a heated area then an oil storage capacity of five or six times the pumped flow/minute may be necessary. Not only does keeping the oil cool help prevent damage to circuit components and oil degradation but also means that a higher percentage of the input energy is used to drive the actuators than is the case with a system running too hot.
For all your hydraulic pumps and motors, coolers, reservoirs and other system parts and components, please feel free to contact White House Products, Ltd. at +44 (0) 1475 742500 today!
When a hydraulic system is operating, hydraulic fluid is being pumped through the system to drive the actuators in the circuit and keep internal parts lubricated and working correctly. Inside motors; the moving parts have very tight clearances between them.
If the fluid rapidly increases in temperature it can cause the internal components to expand faster than the external ones causing the motor to seize. This is an example of temperature shock.One of the easiest solutions to address and prevent temperature shock is to heat up the outer motor housing so that it is also expanding at the same rate as the internal parts and components. This can be accomplished by installing a fluid injector to heat up the motor housing by releasing a small amount of hot hydraulic fluid, however this is complicated and does not address the problem of excessive circuit oil temperature.
Motor?Why Not Just Cool the Hydraulic
Cooling the oil or preventing it from getting too hot is the best option for preventing damage to both oil and components from excessive heat and any chance of temperature shock occurring.If cooling; a fan type air, or water jacket type of cooler could be fitted on the return line to tank/reservoir, however it is important to match the cooling capacity to the heat that is required to be dissipated.
To prevent the oil from getting too hot and thereby stop heat build up and any chance of temperature shock the reservoir capacity needs to be matched to the amount of oil being pumped,. We also need to consider how long continuously the system is working, and what the ambient temperature of the area surrounding the reservoir is. If the power unit and reservoir is in a cool area then a storage capacity of three times the pumped flow/minute will normally be adequate, if inside a heated area then an oil storage capacity of five or six times the pumped flow/minute may be necessary. Not only does keeping the oil cool help prevent damage to circuit components and oil degradation but also means that a higher percentage of the input energy is used to drive the actuators than is the case with a system running too hot.For all your hydraulic pumps and motors, coolers, reservoirs and other system parts and components, please feel free to contact White House Products, Ltd. at +44 (0) 1475 742500 today!