50CYZ-60 Self-priming Centrifugal Oil Pump, Copper Impeller Explosion-proof Centrifugal Oil Pump

1. This pump is a self-priming centrifugal pump, which has the advantages of simple structure, convenient operation, stable operation, easy maintenance, high efficiency, long service life, and strong self-priming capability. No bottom valve is required in the pipeline; only a certain amount of priming liquid needs to be ensured in the pump body before operation. When used on oil tankers or water transport ships, it can also serve as a stripping pump with good stripping effect. 2. This pump is meticulously made of high-quality materials, with alloy mechanical seals for durability. No safety valve is needed in the discharge pipeline, and no bottom valve is required in the suction pipeline, which simplifies the pipeline system and improves working conditions.

Working Principle:

All CYZ series self-priming pumps adopt a pump body structure with axial liquid return. The pump body consists of a suction chamber, a liquid storage chamber, a volute, a return hole, a gas-liquid separation chamber, etc. After the pump starts normally, the impeller sucks the liquid stored in the suction chamber and the air in the suction pipeline together, and they are fully mixed in the impeller. Under the action of centrifugal force, the liquid carrying gas flows toward the outer edge of the volute, forming a white foam belt with a certain thickness and a high-speed rotating liquid ring on the outer edge of the impeller. The gas-liquid mixture enters the gas-liquid separation chamber through the diffusion tube. At this time, due to the sudden decrease in flow rate, the lighter gas is separated from the mixed gas-liquid, and the gas continues to rise and discharge through the pump body's discharge port. The degassed liquid returns to the liquid storage chamber and enters the impeller again through the return hole, mixing with the gas sucked from the suction pipeline inside the impeller. Under the action of the high-speed rotating impeller, it flows toward the outer edge of the impeller again. As this process repeats continuously, the air in the suction pipeline decreases until the air is completely exhausted, completing the self-priming process, and the pump then operates normally.

Because this pump has this unique gas-exhausting capability, it can transport liquids containing gas without a bottom valve, and has good stripping function when used on oil tankers.

Some pump bearing bodies are also equipped with a cooling chamber at the bottom. When the bearing temperature rise exceeds 70°C due to bearing heating, coolant can be injected through any coolant pipe joint outside the cooling chamber for circulating cooling. The sealing mechanism that prevents liquid leakage from high-pressure to low-pressure areas inside the pump is the front and rear sealing rings; the front sealing ring is installed on the pump body, and the rear sealing ring is installed on the bearing body. When the sealing rings wear to a certain extent after long-term pump operation, affecting the pump's efficiency and self-priming performance, they should be replaced.

Pump Operation:

1. CYZ type self-priming oil pumps balance axial force through an internal balance mechanism. The balance device has balance liquid outflow, which is connected to the suction section via a balance water pipe, or a short pipe is set outside the balance chamber, and the balance liquid flows out of the pump through the short pipe. To ensure normal pump operation, the balance water pipe is not allowed to be blocked;

2. CYZ type self-priming pumps' rolling bearings are not equipped with cooling devices. The change in bearing temperature rise reflects the pump's assembly quality. The bearing temperature rise shall not exceed 35°C above the ambient temperature, and the temperature shall not be higher than 75°C;

3. The rotor of CYZ type self-priming pump has a certain axial movement during operation, and the gap between the end faces of the two couplings of the motor and the water pump shall be ensured;

4. During the operation of CYZ type self-priming pump, instruments, pump speed, and the wear of the impeller, sealing ring, guide vane sleeve, balance disc, and shaft sleeve shall be inspected at regular intervals. If the wear is excessive, they shall be replaced in time. In addition, monitor the pump's flow rate, head, temperature, and lubrication condition; when the pump fails, stop the pump and repair it with reference to the fault troubleshooting table.