CYZ-A Marine Fuel Oil Pump

Introduction of CYZ-A Marine Fuel Oil Pump

The CYZ-A marine fuel oil pump produced by our company is the latest pump product designed and manufactured according to the relevant technical data in China and Europe. These pumps are widely used in oil depots, gas stations, tankers, tankers, docks, tankers, airports and are used to transport gasoline, kerosene, diesel, jet fuel, etc. If the pump parts are changed to corrosion-resistant mechanical seals and stainless steel materials, it can also be applied to chemical, pharmaceutical brewing, electroplating, printing and dyeing, papermaking, power mining, etc. The temperature range of the conveyed medium should be -20℃~80℃, the viscosity should be less than 100cP, and the solid content should be below 30%.

Features

1. This series of pumps is a self-priming centrifugal pump, which has the advantages of simple structure, convenient operation, stable operation, easy maintenance, high efficiency, long life and strong self-priming ability. There is no need for a bottom valve in the pipeline, just make sure that some oil is stored in the pump body before the pump works. When the pump is used on oil tankers or water conveyance ships, it can also be used as a stripping pump, and the cleaning effect is good.

2. The pump is made of high-quality materials. The seal of the pump is made of hard alloy mechanical seal, which is durable. The discharge pipeline does not need to install a safety valve, and the suction pipeline does not need to install a bottom valve, which simplifies the pipeline system. Improved working conditions. 

Working principle

The pump adopts the pump body structure of axial liquid return. The pump body is composed of a suction chamber, a liquid storage chamber, a scroll chamber, a liquid return hole, a gas-liquid separation chamber, etc. After the pump is started normally, the impeller sucks the liquid stored in the suction chamber and the air in the suction pipeline together, and releases the liquid in the impeller. Under the action of centrifugal force, the liquid entrains the gas and flows to the outer edge of the scroll chamber, and a white foam belt with a certain thickness and a high-speed rotating liquid ring are formed 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 of the flow rate, the lighter gas is separated from the mixed gas-liquid, and the gas continues to rise and discharge through the discharge port of the pump body. The degassed liquid returns to the liquid storage chamber, and the well enters the impeller through the return hole again, where it is mixed with the gas sucked in from the suction pipeline inside the impeller, and flows to the outer edge of the impeller under the action of the high-speed rotating impeller. As this process goes on over and over again, the air in the suction pipeline is continuously reduced until the gas is exhausted, and the pump is put into normal operation after the self-priming process. Because of this unique exhaust capability, the pump can transport liquids containing gas without installing a bottom valve, and has a good sweeping function when used on oil tankers.

There is also a cooling chamber at the bottom of the bearing body of some pumps. When the bearing temperature rises over 70°C due to the heating of the bearing, the cooling liquid can be injected into the cooling chamber through any coolant pipe joint for circulating cooling. The sealing mechanism inside the pump to prevent the liquid from leaking from the high pressure area to the low pressure area is the front and rear seal rings. The front seal ring is installed on the pump body, and the rear seal ring is installed on the bearing body. When it affects the efficiency and self-priming performance of the pump, it should be replaced.

Model description 80CYZ-A-32P(B)

80—Inlet diameter 80 mm

CYZ—Marine self-priming horizontal centrifugal oil pump

A—represented as improved

32—means the lift is 32 meters

P—stainless steel (if there is no mark, it is cast iron pump)

B—Explosion-proof motor (ordinary motor if not marked)

Main technical parameter

Picture of CYZ-A Marine Fuel Oil Pump 

Precautions for use

1. Preparation and inspection before starting:

(1) This series of oil pumps are lubricated with high-quality calcium-based butter and No. 10 oil respectively according to the working conditions of the pump. If the butter-lubricated pump is used, the bearing box should be filled with butter regularly. If the oil-lubricated pump is used, if The oil level is insufficient and should be added to the standard amount.

(2) Check whether the storage liquid in the pump casing is higher than the upper edge of the impeller. If the over-storage volume is not enough, the storage liquid can be directly added to the pump body from the liquid filling port on the pump casing, and should not be covered with insufficient storage liquid. Start the pump under certain circumstances, otherwise the pump will not work normally and the mechanical seal will be easily damaged.

(3) Check whether the rotating parts of the pump are stuck.

(4) Check the pump body foot and the nuts of each connection for looseness.

(5) Check the coaxiality or parallelism of the pump shaft and the motor shaft.

(6) Check the inlet pipeline for air leakage. If there is air leakage, try to eliminate it.

(7) Open the valve of the suction line and slightly open (do not fully open) the outlet control valve.

2. Start and operation:

(1) Start the oil pump and pay attention to whether the steering of the pump shaft is correct.

(2) Pay attention to whether there are abnormal sounds and vibrations during rotation.

(3) Pay attention to the readings of the pressure gauge and vacuum gauge. After starting, when the readings of the pressure gauge and vacuum gauge fluctuate for a period of time and the indication is stable, it means that the pump has been filled with liquid, and the oil pump has entered the normal oil delivery operation.

(4) During the process of self-priming (or scavenging) before the pump enters the normal oil delivery operation, special attention should be paid to the increase of oil temperature in the pump. If this process is too long and the oil temperature in the pump is too high, stop the pump for inspection its reasons.

(5) If the temperature of the liquid in the pump is too high to cause self-priming difficulties, the pump should be temporarily stopped, and the liquid in the discharge pipeline should be used to flow back into the pump or directly add liquid to the pump at the liquid filling port on the pump body. , to cool the liquid in the pump, and then start it.

(6) Adjust the outlet control valve so that the pressure gauge reading is within the specified range, avoid the oil pump working at the lower limit of the specified range, prevent the motor from overloading due to excessive shaft power, or cause the pump to cavitate due to excessive flow, which affects the normal operation of the pump. Make the pump vibrate strongly and make noise. Please refer to the "Various Liquid Pressure Control Range Table" for the range of pressure used when conveying various oils.

Maintenance and Disassembly

The characteristics of the pump are simple and reliable structure, durable. Under normal conditions, the pump generally does not need to be disassembled and maintained frequently. When a fault is found, it can be eliminated at any time.

1. Pay attention to several main parts when maintaining the pump.

A. Rolling bearing: When the bearing is worn to a certain extent after the oil pump has been running for a long time, the bearing should be replaced.

B. Front sealing ring, rear sealing ring: When the sealing ring is worn to a certain extent, it should be replaced.

C. Mechanical seal: In the case of no oil leakage, the mechanical seal should not be disassembled for inspection. If serious leakage occurs at the leakage port at the lower end of the bearing, the mechanical seal should be dismantled and inspected. When assembling and disassembling the mechanical seal, it must be handled with care, pay attention to the cleaning of the mating surface, protect the mirror surface of the static ring and the moving ring, and it is strictly forbidden to knock and collide. Another reason for the leakage of mechanical seals is that the "o"-shaped rubber sealing ring (or cushion) is improperly installed, or deformed and aged. At this time, it is necessary to adjust or replace the "o" ring seal for reassembly.

2. Disassembly sequence of oil pump:

A. Remove the motor or disengage the coupling.

B. Remove the bearing body assembly, check the radial clearance between the impeller and the front port ring, and check whether the impeller nut is loose.

C. Remove the impeller nut, pull out the impeller, and check the radial clearance between the impeller and the rear seal ring.

D. Loosen the set screw of the mechanical seal, pull out the moving ring part of the mechanical seal, check the fit of the end faces of the dynamic and static rings, and check the sealing condition of the "o"-shaped sealing ring (or cushion).

E. Unscrew the set nut of the coupling and pull out the coupling.

F. Remove the bearing cover and remove the pump shaft and bearing.

G. Assembly can be done in reverse order during installation.

Maintenance and Disassembly

The characteristics of the pump are simple and reliable structure, durable. Under normal conditions, the pump generally does not need to be disassembled and maintained frequently. When a fault is found, it can be eliminated at any time.

1. Pay attention to several main parts when maintaining the pump.

A. Rolling bearing: When the bearing is worn to a certain extent after the oil pump has been running for a long time, the bearing should be replaced.

B. Front sealing ring, rear sealing ring: When the sealing ring is worn to a certain extent, it should be replaced.

C. Mechanical seal: In the case of no oil leakage, the mechanical seal should not be disassembled for inspection. If serious leakage occurs at the leakage port at the lower end of the bearing, the mechanical seal should be dismantled and inspected. When assembling and disassembling the mechanical seal, it must be handled with care, pay attention to the cleaning of the mating surface, protect the mirror surface of the static ring and the moving ring, and it is strictly forbidden to knock and collide. Another reason for the leakage of mechanical seals is that the "o"-shaped rubber sealing ring (or cushion) is improperly installed, or deformed and aged. At this time, it is necessary to adjust or replace the "o" ring seal for reassembly.

2. Disassembly sequence of oil pump:

A. Remove the motor or disengage the coupling.

B. Remove the bearing body assembly, check the radial clearance between the impeller and the front port ring, and check whether the impeller nut is loose.

C. Remove the impeller nut, pull out the impeller, and check the radial clearance between the impeller and the rear seal ring.

D. Loosen the set screw of the mechanical seal, pull out the moving ring part of the mechanical seal, check the fit of the end faces of the dynamic and static rings, and check the sealing condition of the "o"-shaped sealing ring (or cushion).

E. Unscrew the set nut of the coupling and pull out the coupling.

F. Remove the bearing cover and remove the pump shaft and bearing.

G. Assembly can be done in reverse order during installation.

Troubleshooting