First, how to judge the failure of the heavy oil gear pump 1. After the heavy oil gear pump unit is connected to the power supply, there is no response. Most of this is caused by a power plug, a power lead, and a motor winding open. First, how to judge the failure of the heavy oil gear pump
1. There is no response after the heavy oil gear pump unit is connected to the power supply.
Most of this is caused by a power plug, a power lead, and a motor winding open.
2. The heavy oil gear pump is difficult to start or cannot be started, and is accompanied by a "beep" sound.
During maintenance, the blade can be quickly moved in the direction of running. If the motor runs quickly, it indicates that the starting capacitor or the starting winding is damaged. Replace the capacitor of the same capacity or repair the starting winding. If the motor is issued, most of the motor and pump head Mechanical failures such as bearing damage, impeller stuck, etc.
3, the motor can run, but the speed is not up, and the case is overheated and has a burnt smell.
Botaibang pump industry believes that most of this failure is caused by short circuit of motor winding. The motor should be disassembled and repaired by welding, jumper, isolation and rewinding.
4. The noise is large and the vibration is large during operation.
Most of them are bearing damage or the bearing and the casing are not properly matched. It is necessary to disassemble the motor for inspection. If the bearing is damaged, it should be replaced. If the bearing is “running outside the circleâ€, the matching surface of the pump casing can be treated with stencil; if the bearing is “running inside†"Circle", which can be used for the wear of the motor shaft, and the wear is severe. It is repaired by the method of turning after welding. If the products produced by Botou Taibang Pump & Valve Manufacturing Co., Ltd. cannot be judged correctly, Botaibang Pump Industry believes that it is necessary to understand some troubleshooting methods for heavy oil gear pump faults.
Second, the list of troubleshooting methods for heavy oil gear pump common faults
1. Noise or vibration is generated in the pump
(1) When the suction height exceeds the specified value, reduce the suction stroke.
(2) The pump shaft is bent for repair or replacement.
2, heavy oil gear pump does not produce oil
(1) Check if the oil storage chamber of the pump body is filled with sufficient oil before starting (at least the oil level exceeds the impeller center line). Otherwise, add enough oil.
(2) Whether the direction of rotation meets the requirements. If they are inconsistent, they can be adjusted to match the direction of rotation of the pump.
(3) Whether the impeller port of the self-priming sewage pump is blocked. If it is blocked, it should be dredged.
(4) Whether the suction pipe is leaking or blocked. If so, it should be excluded immediately.
(5) Check the mechanical seal and the skeleton oil seal for damage. Replace if damaged.
(6) The return hole in the pump body must be unblocked. Otherwise, clean the return hole to remove the blockage.
(7) If the oil pump speed is too low, it should be made to reach the normal speed.
3, the automatic time is too long, the pipe centrifugal self-priming effect can not be reflected
(1) Appropriately increase the position of the return hole.
(2) Properly control the gap between the outer diameter of the impeller and the diaphragm of the pump body.
(3) Ensure that the centerline of the impeller coincides with the centerline of the volute.
(4) Properly increase the area of ​​the return hole (but not too large).
4, the lift does not reach the maximum self-priming height
(1) The area of ​​the return hole is appropriately reduced, which increases the self-priming time, but increases the maximum self-suction height of the heavy oil gear pump.
(2) The pump body diffusion tube is not too oblique or too low, and appropriately increasing the height of the diffusion tube can increase the suction stroke of the heavy oil gear pump.
5. After the heavy oil gear pump runs out of oil, the self-priming process cannot be completed.
(1) Check if the return hole is enlarged. In general, since the reflux hole is large and the reflux speed is fast, the excluded gas mixture is increased, so that the oil is discharged from the pump outlet, but the self-priming process cannot be completed. This can properly block the return hole and reduce it.
(2) Appropriately increase the outlet height of the pump. If the outlet height is low, the liquid leaks easily under the rotation of the impeller, and gas-oil separation cannot be formed.
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