【 Weak current College 】 centrifugal pumps and submersible pump features and how to cope with---Power By 【 China power house network 】

Submersible pumps can be put into place underwater, centrifugal pumps, the size of the ground should be their connection pipe diameter.

1. the pump dive pump

One use for a very wide range of water treatment tool. And ordinary pumps different is it work under water, but most of the work of pumps on the ground.

Submersible pump works

Before starting the pump, suction tube and pump must be filled with liquid. After starting the pump impeller spinning at the liquid with the blade rotates with the role of the centrifugal force, fly away from the impeller to shoot, shoot the proliferation of liquids in pump shell slow indoor speed gradually, gradually increasing pressure and then discharged from the pump outlet, pipe flow out. At this point, in blade Center because of the liquid being left to the surrounding air, neither without liquid vacuum area of low pressure, liquid pool of liquid in the tank surface under the action of atmospheric pressure, suction pipes into the pump, liquid is continuous aspiration from liquid pool is up and went out from the exhaust pipe.

Submersible pump of basic parameters

Including flow rate, head, pump speed, accessory power, rated current, efficiency, size, etc.

Submersible pump main purpose and scope of application

Including the construction of drainage, water for agriculture and irrigation, industrial, water cycle, water supply and rural residents refer to, and even rescue, etc.

2. pump

First, what is a centrifuge.

Centrifugal actually objects such as inertial performance. water drops on umbrella, umbrella, slow rotation, water droplets will follow the umbrella rotation, this is because the umbrellas and drops of friction as a centripetal force to drop so. However if the rotational speed, umbrella, the friction force is insufficient to make the water drops in a circular motion, then drops off an umbrella to the outer edge movement-like with a rope took stones do circular motion, if the speed is too fast, the rope will break, the stones will fly out-this is the so-called centrifugal.

Centrifugal pumps are the basis of this principle design of high-speed rotating impeller blade led water rotation, water thrown, thus conveying purpose.

Centrifugal pump has a good variety. from use can be divided into civil and industrial pump from conveying media can be divided into fresh water pump and impurity pump, corrosion-resistant pump, etc.

The basic structure of a centrifugal pump is made up of six parts, namely: the pump body, impeller, shaft, bearing, sealing rings, stuffing.

1, the impeller is a core part of centrifugal pump, high output, the rotational speed of impeller blade also play a major role in assembling the front impeller through static balance test. Impeller and external surface requirements on smooth, to reduce the flow of friction loss.

2, pump body also called casing, it is the body of the pump. Play a supporting role, and work with the fixed housings for carrier phase connection.

3. pump's role is to lend coupling and electric motor is connected, the motor's torque to the wheel, it is passed the main parts of mechanical energy.

4. bearings is set in the shaft of the widget on the support shaft, ball bearing and bearing two. Rolling bearings use butter as lubricant filling to appropriate General-2/3 to 3/4 size too much and too little will generate heat, and noise and heat! plain bearings are using transparent oil lubricants, fuel line to the oil level. Too much oil seeps along the pump and float *, too little bearing and thermal burn accidents! in the pump running bearing temperature up to 85 degrees usually runs at 60 degrees, if you will find the reasons for the high (whether there are sundries, oil is black, if water intake) and processed in a timely manner!

5, sealing rings, also known as reducing ring. Pump housing and impeller of the gap between the General Assembly had caused pump high pressure area of the Park's this gap flow to the area of low pressure, impact, efficiency of pumps water discharge reduces! clearance is too small will cause the impeller and the pump must wear of friction produces. In order to increase the return resistance of the internal leakage reduction, delaying the impeller and the pump housing, service life of the pump housing and impeller within margin of foreign aid in conjunction with the Department is equipped with sealing ring, sealing gaps remain between the 0.25 ~ 1.10mm.

6, primarily by filling the stuffing box, seal ring, packing, packing gland, dip pipe. The role of the stuffing box is mainly to closed casing and the gap between the shaft and does not let the water flow in pump does not flow out to won't allow outside air into the pump. Always maintain the pumps in the vacuum pump and packing when frictions thermal soon rely on dip pipe live water to water circles make packing cooling! keep the normal operation of the pump. So in the pump running circuit check on stuffing of check is especially! running 600 hours will be replaced on the packing.

The working principle of centrifugal pumps

The working principle of centrifugal pump is: rely on high-speed rotating impeller, the liquid in the inertial effects of centrifugal force won energy to increase pressure. Water pump in the work, the pump body and fles must tank filled with water to prevent the occurrence of cavitation phenomenon. When the impeller rotation, rotate quickly leaves to water, turning water under the effect of the centrifugal impeller in, pump water was thrown out, the central part of the formation of the impeller vacuum area. The water in the water the atmospheric pressure (or pressure) under pressure through the network to the inlet pipe. This cycle, can achieve continuous pumping. Here it is worth mentioning: centrifugal pump starts to pump shell before must be filled with water after the start, otherwise will result in the pump body heat, vibration, water discharge reduces damage to the pump (hereinafter referred to as "CAVITATION") creates the equipment accident! so-called cavitation refers to: centrifugal pump starts to pump the air, as in air density is very low, the rotation of the centrifugal force generated is small, thus impeller Centre districts formed by low enough to be level below the pump inlet of liquid suction pump, not conveying fluid phenomena.

Many types of centrifugal pumps, classification of common following ways.

1. by way of impeller inhalation: single-suction centrifugal pumps double-suction centrifugal pumps;

2. press the number of points: single-stage impellerCentrifugal multistage centrifugal pumps;

3. press the impeller structure: open type impeller centrifugal pump impeller semi-open impeller centrifugal pump centrifugal pump closed;

4, according to the working pressure: low pressure centrifugal high-pressure centrifugal pumps in pressure centrifugal pumps;

5. press the pump shaft position: vertical centrifugal pump of horizontal centrifugal pump side.

ISG live feed pump, domestic pump, community water supply and drainage pump, life, according to the device IS, IR-type centrifugal pump performance parameters and the unique structure of vertical pump combination design, and in strict accordance with the requirements set ISO2858 wine manufacturing, domestic high-quality hydraulic model design, is the ideal new horizontal pump products. The products will be with carbide mechanical seal. Application scope: isw type pump suitable for industry and city's giving and draining off water, skyscraper pressurization is given water, Garden sprinkling irrigation, fire control pressurization, long-range transport, HVAC refrigeration circulation, bathroom, supercharged and equipment, usage temperature does not exceed 85oC. Iswr type pump is extensively suitable for: metallurgy, chemical industry, textile, papermaking, and Penn restaurant shops, boiler heat source water booster, transportation, and the city heating system, SGWR type uses temperature of not more than 120oC.