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PUMPS CM4-30 50HZ
Our water pump is constructed with a heavy-duty stainless steel pump head, aluminum pump housing, and PES impeller, rust-proof, and waterproof. Brass fittings and a water stop will come with the pump for corrosion-proof and leakage-proof. The powerful water pump has max. 40 L/min water flow, max. 10 bar pressure and max. 20 ft head lift. In addition, the super silent running property(about 25dB) can provide you with a quiet pump: high performance but low noise. This water circulator pump features a three-power control switch in 46/67/93W. It is convenient for you to adjust the flow rate to your different requirements
Product parameters
| 50Hz | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Model | Model | Driving motor P2(KW) | Q (m3/h) |
2.0 | 3.0 | 4.0 | 5.0 | 6.0 | 7.0 |
| CM4-30 | CHLF4-30 | 0.75 | H(m) | 27 | 25 | 22 | 19 | 15 | 10 |
Maintenance of Water Pump
During vehicle use and maintenance, if the engine water pump is not properly used and maintained, water leakage, bearing damage, pump shaft wear and other failures are likely to occur, forcing the engine to stop for repair and affecting the normal use of the vehicle. Therefore, the following seven aspects should be achieved in use.
- When driving and installing the engine water pump correctly, ensure that the gear driven water pump closely matches the drive gear, and ensure that the coaxiality of the water pump shaft and the pulley hub is within the specified range for the belt driven water pump. Prevent the water pump from shaking when the engine increases speed and load, which will aggravate wear.
- Adjust the belt tightness in time. The fan belt cannot be adjusted too tight, or the load of the water pump bearing will be increased. If two belts are used for transmission, ensure that the new and old belts are the same in length and tightness to prevent the water pump from being damaged due to imbalance caused by different forces on the two belts.
- Fill lubricating oil in time. The water pump bearing shall be lubricated in time. Generally, it shall be filled once every 6000~8000km. In practice, many drivers and repairmen often neglect the lubrication of the water pump bearing, or because the grease fitting is damaged and not replaced in time, it is impossible to inject oil at all, resulting in early damage of the bearing due to lack of oil, and wear of pump shaft and other parts.
- The water pump shaft with the overflow hole that cannot be blocked has an overflow hole, which can observe whether the water pump leaks. The hole cannot be blocked. If it is blocked, the leaking water will enter the bearing and damage the lubrication, leading to early damage to the bearing.
- In winter, the water shall be drained to prevent the water seal and pump shaft from freezing due to water storage in the pump. When starting, it is very easy to make the pump shaft rotate and tear the water seal, causing water leakage.
- Timely remove the scale in the water pump The scale in the water pump has accumulated for a long time, which weakens the pump capacity. At the same time, the scale is easy to corrode the components in the water pump, causing early damage to the water pump.
- When replacing the water pump bearing, the proper bearing shall be selected, and the bearing shall be tightly seated in the bearing seat during installation. The selected bearing shall be of reliable quality, otherwise, the pump shaft will be worn due to the short service life of the bearing.
Technical questions and answers about pumps
What are the reasons for rotor imbalance?
A: 1) manufacturing error: uneven material density, different axial degrees, out of roundness, uneven heat treatment;
2) Incorrect assembly: the central line of the assembly part is different from the axis;
3) Deformation of rotor: uneven wear, shaft deformation under operation, and temperature.
What is a dynamically unbalanced rotor?
A: there is a rotor with equal size, opposite direction, and unbalanced particles integrated into two couples that are not on a straight line.
How to prevent evacuation and cavitation during operation?
A: evacuation: there are gases and liquids in the pump, the pump cannot work, and the flow and pressure tend to zero.
Cavitation: it occurs in the running pump and comes from the medium in the pump. The flow and pressure change and drop, resulting in hydraulic shock.
Generally, pump evacuation refers to a kind of cavitation phenomenon in the pump. The evacuation caused by the suction of gas due to leakage of installation technology pipeline is rare, and most of it is caused by operation and process changes.
In the process of operation, we should start with stabilizing the process operating conditions. The lower limit should be taken for the operating temperature and pressure. To avoid or control the occurrence of cavitation, the flow of the pump should be moderate during operation and try to reduce the large changes in pressure and temperature. The suction pipeline of the pump shall prevent the retention of gas, and the inlet of the standby pump with negative pressure at the inlet shall be closed.
What are dynamic fit and static fit? What is the obvious difference between them?
A: 1) dynamic fit: the actual size of the hole is larger than the actual size of the pump;
2) Static fit: the fit formed by the actual size of the shaft is larger than the actual size of the hole;
3) Obvious difference: with the dynamic fit, the shaft can move relative to the hole; in Static fit: there is no relative movement between the shaft and the hole.
What are the four basic requirements for equipment maintenance?
A: tidy, clean, lubricated, and safe.
What is the working principle of the labyrinth seal?
A: labyrinth seal: it is composed of several ring-shaped seal teeth arranged in turn. A series of throttling gaps and expansion spaces are formed between the teeth and the rotor. The fluid passes through many zigzag channels and generates great resistance after multiple throttling, making it difficult for the fluid to leak and achieve the purpose of sealing.
What is the interchangeability of parts? What is the main function?
A: 1) the parts can be used interchangeably and meet the requirements of the original parts, which is called the interchangeability of parts.
2) It mainly plays a role in facilitating maintenance, reducing maintenance time, improving equipment utilization, and working efficiency.
What is a power pump?
A: the power pump continuously transmits energy to the conveyed liquid, so that its velocity kinetic energy and pressure energy potential energy are increased, mainly by increasing the velocity, and then reducing its velocity, so that most of the kinetic energy is converted into pressure energy, and the pressure of the conveyed liquid has been increased is used for transportation.
Such as 1) vane pump, which includes centrifugal pump, mixed flow pump, axial flow pump, vortex pump, etc; 2) Jet pump, including gas jet pump, liquid jet pump, etc.
Application field
① In the production of chemical and petroleum sectors, most of the raw materials, semi-finished products and finished products are liquids, and the production of semi-finished and finished raw materials into semi-finished products and finished products needs to go through complex technological processes. During these processes, pumps play a role in transporting liquids and providing pressure flow for chemical reactions. In addition, in many installations, pumps are used to adjust the temperature.
② In agricultural production, pumps are the main irrigation and drainage machinery. my country's rural areas are vast, and a large number of pumps are needed in rural areas every year. Generally speaking, agricultural pumps account for more than half of the total output of pumps. Pumps are also the most used equipment in the mining and metallurgical industries. The mine needs to be drained by pumps, and in the process of beneficiation, smelting and rolling, pumps are needed to supply water.
③ In the power sector, nuclear power plants need nuclear main pumps, secondary pumps, and tertiary pumps, and thermal power plants need a large number of boiler feed pumps, condensate pumps, oil and gas mixing pumps, circulating pumps, and ash pumps.
④ In national defense construction, the adjustment of aircraft flaps, tail rudders and landing gear, the rotation of warships and tank turrets, and the ups and downs of submarines all require pumps. High pressure and radioactive liquid, and some also require the pump without any leakage.
⑤ In short, whether it is aircraft, rockets, tanks, submarines, drilling, mining, trains, ships, or everyday life, pumps are needed everywhere, and pumps are running everywhere. That's why the pump is listed as a general-purpose machine, which is a major product in the machinery industry.
⑥ Electric pumps, i.e. pumps driven by electricity. The electric pump is composed of a pump body, a water lift pipe, a pump base, a submersible motor (including cables) and a starting protection de
