The working principle of the chemical centrifugal pump is that under the circumstance that the pump is filled with water, the impeller rotates to produce the centrifugal force, and the water in the impeller channel is thrown to the pump shell by the centrifugal force under the action of centrifugal force, so the pressure in the center of the impeller is reduced, Water pressure, water in the role of the pressure difference from the suction tank into the impeller. This pump can continue to absorb water constantly supply. In addition to the role of the impeller, the role of spiral pump shell is also very important. The fluid that has gained energy from the impeller has a greater function as it flows out of the impeller. The liquid collects in the helical casing and changes the kinetic energy into pressure energy in the diffuser. Compared with other kinds of pumps, the chemical centrifugal pump has the advantages of simple structure, easy to wear, smooth operation, low noise, uniform water discharge, convenient adjustment and high efficiency, therefore, the chemical centrifugal pump has been widely used. Chemical Centrifugal Pump Notes: Installation instructions 1. Installation of pipe weight should not be added to the pump, should have their own support, so as not to affect the operation of deformation and life expectancy. 2. Pump and motor is the overall structure, no need to find the correct installation, so the installation is very convenient. 3. The installation must be tightened anchor bolts, so as to avoid the impact of vibration on pump performance when starting. 4. Before installing the pump should be carefully checked whether there is any impact on the pump runner pump hard material (such as stones, iron particles, etc.), so as to avoid damage to the pump impeller and pump body. 5. For maintenance convenience and safety, install a regulating valve on the inlet and outlet of the pump and install a pressure gauge near the pump outlet to ensure the operation within the rated head and flow range, to ensure the normal operation and growth of the pump The life of the pump. 6. Pump suction stroke occasions should be equipped with the end of the valve, and the inlet pipe should not have too many corners, at the same time not have leakage, leakage phenomenon. 7. Discharge pipe, such as check valve should be installed outside the gate valve. 8 After the installation of the pump shaft, the impeller should be friction sound or stuck phenomenon, or should open the pump to check the reasons. 9. Pump installation is divided into rigid connection and flexible connection installation. Start and stop: I. Preparing for starting 1. Turn the motor blades by hand, the impeller should be free from jamming and be flexible. 2. Open the inlet valve, open the vent valve to allow the fluid to fill the entire pump chamber, and close the vent valve. 3. Hand pump pump so that the lubricating liquid into the mechanical seal face. 4. Move the motor to determine the steering is correct. Two. Starting and running 1. Fully open the inlet valve, close the discharge pipe valve. 2. Turn on the power, when the pump reaches the normal speed, then gradually open the valve on the discharge pipe and adjust to the required conditions. 3. Observe the instrument readings, check the shaft seal leakage, the normal mechanical seal leakage, <3 drops / min, check the motor, the bearing temperature ≤ 70 degrees C, if abnormal circumstances should be promptly addressed. Three parking 1. Gradually close the discharge pipe valve, cut off the power. 2. Close the inlet valve. 3. If the ambient temperature is below 0 degrees C, the pump liquid should be depleted to avoid cracking. 4. If the long-term disabled, the pump should be disassembled and cleaned, packed and stored. Pump maintenance and care: I. Maintenance and maintenance in operation 1. The water line must be highly sealed. 2. Prohibit long-term operation of pump in cavitation. 3. Prohibit the pump running in the flow, the motor over-current long-term operation. 4. Regular check pump operation, the motor over-current long-term operation. 5. The pump should have someone in charge of the operation, in order to avoid accidents. 6. The pump should operate for 500 hours of running time for refueling. Motor power is greater than 11KW with a refueling device, high pressure gun can be injected directly to ensure excellent bearing lubrication. 7. Long-term operation of the pump, due to mechanical wear, so that the unit noise and vibration increases, the parking should be checked, if necessary, replace the vulnerable parts and bearings, unit overhaul period is generally one year. Mechanical seal maintenance and maintenance 1. Mechanical seal lubrication should be clean without solid particles. 2. It is forbidden to work mechanical seal under dry grinding condition. 3. Before starting the pump (motor) should be circled several times, so as not to cause a sudden start breaking seal ring damage.
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