Air cooled heat transfer oil pump motor temperature rises and burns fast burning motor.

For the use of high-lift heat transfer oil pump in low head, some people will not understand, thinking that the motor will definitely not burn, but the efficiency is not as good as when the head is high, what is everyone's opinion? The online statement is as follows: Many customers think that the lower the head of the heat transfer oil pump, the smaller the motor load.

Under the misleading of this misunderstanding, when purchasing a heat transfer oil pump, the head of the heat transfer oil pump is often selected very high. In fact, for the centrifugal heat transfer oil pump, when the heat transfer oil pump model is determined, the power consumption is proportional to the actual flow rate of the heat transfer oil pump. The flow rate of the heat transfer oil pump will decrease with the increase of head, so the higher the head, the smaller the flow rate and the smaller the power consumption.

Conversely, the lower the head, the greater the flow rate and the greater the power consumed. Therefore, in order to prevent the motor from overloading, it is generally required that the actual pumping head of the heat conduction oil pump shall not be less than 60% of the calibrated head. Therefore, when the high head is used for pumping oil at too low head, the motor is easy to overload and heat, and the motor can be burned in serious cases.

If it is used in an emergency, a gate valve must be installed on the outlet pipe to adjust the oil output (or a small oil outlet must be blocked with wood and other objects) to reduce the flow rate and prevent the motor from overloading. Pay attention to the temperature rise of the motor, if the motor is found to be overheated, it should be turned off in time to reduce the flow rate of the oil outlet or shut down. This can also be misunderstood, as some operators believe that clogging the oil outlet and forcing a reduction in flow rate will increase the load on the motor.

In fact, on the contrary, the outlet pipe of the regular high-power centrifugal pump irrigation and drainage unit is equipped with a gate valve, in order to reduce the motor load when the unit starts, the gate valve should be closed first, and then the gate valve is gradually opened after the motor is started. Personally, I think that if you use it like this, the resistance will be smaller, and the speed of the heat transfer oil pump will increase appropriately, so the flow will become larger, and the resistance of the asynchronous motor will be small, the speed will increase, the current will decrease, and the power will be less than the rated power, and the motor will not be burned at all, just a lighter load. Of course, it is not recommended to use this because its efficiency will be relatively low, because it is designed for high head, and the water output will be relatively small under the same power conditions.

Only according to the actual use requirements, such as the actual use of flow, head, temperature, pipeline length, pipeline loss and other specific data to choose the appropriate heat transfer oil pump, in order to ensure the normal operation of the heat transfer oil pump. Our company has many years of practical experience in the production of heat conduction oil pumps, centrifugal hot oil pumps, and air-cooled hot oil pumps. Welcome the majority of customers who use and demand heat oil pumps and heat oil pumps to call our company to jointly improve the use of heat transfer oil pumps!

Li Xiang, Vincent, Jiang Shansheng, Lan.

Summary. In response to this problem, we can take the following measures to solve it: firstly, check whether the temperature of the heat transfer oil circulating pump motor exceeds the normal range, if it exceeds the normal range, you need to take measures to reduce the temperature.

Secondly, it is necessary to check whether the control system of the heat conduction oil circulating pump motor is normal, if not, you need to check the circuit of the control system and replace the components of the control system to ensure the normal operation of the control system. Again, it is necessary to check whether the lubricating oil of the heat transfer oil circulating pump motor is normal, if not, the lubricating oil needs to be replaced to ensure the normal operation of the motor. Finally, it is necessary to check whether the heat dissipation system of the heat transfer oil circulation pump motor is normal, if not, you need to check the circuit of the heat dissipation system and replace the components of the heat dissipation system to ensure the normal operation of the heat dissipation system.

In short, to solve the problem of excessive temperature of the heat transfer oil circulating pump motor, it is necessary to check the control system, lubricating oil and heat dissipation system, and take corresponding measures to ensure the normal operation of the motor.

In response to this problem, we can take the following measures to solve it: firstly, check whether the temperature of the heat transfer oil circulating pump motor exceeds the normal range, if it exceeds the normal range, you need to take measures to reduce the temperature. Secondly, the first thing to check is whether the control system or digital system of the heat transfer oil circulating pump motor is normal, if it is not normal, it is necessary to check the circuit of the control system and replace the components of the control system to ensure the normal operation of the control system.

Again, it is necessary to check whether the lubricating oil of the heat transfer oil circulating pump motor is normal, if not, the lubricating oil needs to be replaced to ensure the normal operation of the motor. Finally, it is necessary to check whether the heat dissipation system of the heat transfer oil circulation pump motor is normal, if not, you need to check the circuit of the heat dissipation system and replace the components of the heat dissipation system to ensure the normal operation of the heat dissipation system. In short, to solve the problem of excessive temperature of the heat transfer oil circulating pump motor, it is necessary to check the control system, lubricating oil and heat dissipation system, and take corresponding measures to ensure the normal operation of the motor.

I'm still a little confused, can you be more detailed?

In response to this problem, we can say that the temperature of the heat transfer oil circulating pump motor should generally be between 50-60, which is a normal temperature range. If the temperature exceeds 60, it may be caused by overload of the motor or insufficient lubricating oil, and timely measures should be taken to maintain and repair it. In addition, the temperature of the motor is also affected by the ambient temperature, if the ambient temperature is too high, the temperature of the motor will also rise accordingly, therefore, when lifting the pin to install the motor, attention should be paid to selecting the appropriate ambient temperature to ensure the normal operation of the motor.

In addition, the temperature of the motor is also affected by the load degree of the motor, if the load of the motor is too large, the temperature of the motor will also rise accordingly, therefore, when using the motor, you should pay attention to controlling the load of the motor to ensure the normal operation of the motor. In short, the temperature of the heat transfer oil circulating pump motor should generally be between 50-60, if the temperature exceeds 60, measures should be taken in time to maintain and repair the finger to ensure the normal operation of the motor.

The main reasons are: caused by overload, the specific gravity of the conveyed material is too large, the working pressure is too large, the range of use (flow, head) exceeds the design requirements of the high-temperature oil pump, and the coaxiality of the motor and the pump is poor when the high-temperature oil pump is assembled.

The high-temperature oil pump is composed of the pump body, pump cover, internal and external rotor, pump shaft, shaft end combination seal and other parts. The main drive is composed of a set of rotors meshing with each other, and the shaft end seal adopts a high-temperature reflux resistant combination seal, and the water tank cooling method is used to control the shaft seal temperature. The high-temperature gear pump is a positive displacement pump, which relies on the change in working volume caused by the meshing of the main and driven gears to transport the melt.

The working volume consists of the pump body, the tooth groove of the gears and the bearings with side plate functions. The pump and motor use a three-claw elastic coupling to form the oil pump unit.

Measures to improve the operating life of high-temperature oil pumps.

1. Because the pump body of the high-temperature oil pump operates at high temperature, a hinge support should be set on the piping during cold installation to prevent the displacement of the piping after heating.

2. The melt filter behind the outlet of the high-temperature pump should be replaced regularly, and it should not be operated at high pressure or even pressure for a long time.

3. The coupling must be hotly aligned after the pump body is heated to avoid additional torque during operation.

4. The pressure measuring point at the outlet of the high-temperature pump should be set up with an interlock stop alarm, otherwise, once the discharge pipeline is blocked, it is easy to cause damage to the pump body.

5. The speed increase should be carried out slowly, and the front and rear pressure should not rise sharply, so as not to damage the bearing or make the melt block the lubrication channel.

6. When the pump is started and argued, when the outlet is formed without pressure, it is not allowed to blindly speed up to prevent the shaft from being repented or the bearing from being damaged prematurely.

7. Regular replacement of bearings can save maintenance costs. When it is found that the amount of wear on the inner surface of the shaft or bearing is close to the thickness of the hardened layer, the shaft can be ground and used again, and only the bearing can be replaced, which can extend the life of the pump shaft by 8 to 10 years.

8. When cleaning and pipetting, do not use the pump to transport the cleaning liquid, remove the internal parts, and install it after the pipetting is completed, so as to avoid foreign matter mixed in the pump.

9. In case of power failure or interruption of heat medium circulation more than 3omin, the pump should be disassembled and cleaned and reassembled to avoid damage to the high-temperature pump due to poor bearing lubrication caused by melt solidification and cracking.

Check whether the switch that controls the motor is pointing and seeping, whether the contact is good at the three-shed contact point, and when the motor makes the only spine for more than ten minutes, the poor contact contact will cause the motor to run in a single phase, and the heating overload will be overloaded until it trips

The motor heating is caused by the excessive current and overload, and the motor overload is caused by the excessive load of the oil pump

1. The pressure is too high: reduce the use pressure.

2. The flow rate is too large: reduce the speed.

Any one of the above two items can reduce the load, and the motor power is calculated as [pressure (MPa) * flow rate (liters per minute) 60] = power.

Two: check to see if the specific gravity of the conveyed material is too large, if it is too large, it can also lead to the motor too much.

DAO Fever; Special exclusion method: re-selection of genus;

Three: when the working pressure is too large, it can also cause the motor to overheat, the elimination method: you can try to use a high-temperature gear pump should be able to solve the pressure problem;

4. The scope of use (flow, head) exceeds the design requirements of the high-temperature oil pump? Select the right motor according to the series type.

Five: the high temperature oil pump in the assembly of the motor and pump coaxiality difference not only the motor will heat up and in the process of use of noise will also increase, solution: disassemble the bottom corner screw, re-check the coaxiality, and then tighten the screw can be solved; The reasons for the heating of the motor during the use of the high-temperature oil pump are probably the above; If you still can't solve the problem, you can contact the oil pump manufacturer;

2: Check whether the specific gravity of the conveyed material is too large, if it is too large, it can also cause the motor to overheat; Exclusion method: re-selection;

Three: when the working pressure is too large, it can also cause the motor to overheat, the elimination method: you can try to use a high-temperature gear pump should be able to solve the pressure problem;

4. The scope of use (flow, head) exceeds the design requirements of the high-temperature oil pump? Select the right motor according to the series type.

Five: the high temperature oil pump in the assembly of the motor and pump coaxiality difference not only the motor will heat up and in the process of use of noise will also increase, solution: disassemble the bottom corner screw, re-check the coaxiality, and then tighten the screw can be solved; The reasons for the heating of the motor during the use of the high-temperature oil pump are probably the above; If you still can't solve the problem, you can contact the oil pump manufacturer;