The working principle of engineering plastic magnetic drive pump

Engineering plastic magnetic drive pump is full name engineering plastic magnetic drive centrifugal pump, its structure is usually composed of electric motor, magnetic coupling and engineering plastic centrifugal pump. Its main feature is that the magnetic coupling is used to transmit power, and there is no leakage. When the motor drives the outer magnet of the magnetic coupling to rotate, the magnetic lines of force pass through the gap and the isolating sleeve, and act on the inner magnet to make the pump rotor and the motor rotate synchronously. , Transfer torque without mechanical contact.

　　At the power input end of the pump shaft, since the liquid is enclosed in a stationary isolating sleeve, there is no dynamic seal and therefore no leakage.

Magnetic drive pump manufacturers and suppliers from China.

Correct inflation method of stainless steel Air operated double diaphragm pump

We know that the structure of the Air operated double diaphragm pump air chamber is generally used to separate the water chamber from the air chamber. After the air chamber is filled with compressed air, the pulsation of the water in the water chamber is absorbed by the compressed air in the air chamber through the rubber diaphragm Up. The function of the air chamber is to use the compressibility of air, or called elasticity, to absorb the water pulsation of the AODD pump and stabilize it. The water flow into the system is basically stable. However, to achieve the requirement of a basically stable water flow, the air pressure in the air chamber must be compatible with the water pressure. Inflation method of diaphragm pump air chamber: Before the diaphragm pump is operated, inflate the air chamber first, and the air pressure is greater than the working pressure of the pump. Drive the AODD pump and adjust to the working pressure. At this time, you can see the pump’s water outlet hose shakes violently. Take a needle and put it on the air nozzle to deflate. As the deflation progresses, the shaking of the water outlet hose will gradually disappear. After the water outlet hose is stable, stop deflating. ~ We know that the structure of the diaphragm pump air chamber is generally used to separate the water cavity from the air cavity. After filling the air chamber with compressed air, the pulsation of the water in the water chamber is absorbed by the compressed air in the air chamber through the rubber diaphragm. The function of the air chamber is to use the compressibility of air, or called elasticity, to absorb the water pulsation of the diaphragm pump and stabilize it. The water flow into the system is basically stable. However, to achieve the requirement of a basically stable water flow, the air pressure in the air chamber must be compatible with the water pressure. Inflation method of diaphragm pump air chamber: Before the diaphragm pump is operated, inflate the air chamber first, and the air pressure is greater than the working pressure of the pump. Drive the diaphragm pump and adjust it to working pressure. At this time, you can see the pump’s water outlet hose vibrates violently. Take a needle and put it on the air nozzle to deflate. As the deflation progresses, the shaking of the water outlet hose will gradually disappear. After the water outlet hose is stable, stop deflating.

AODD pump manufacturers and suppliers from China

AODD PUMP FROM CHINA — The Air Operated Pneumatic Diaphragm Pump manufactured by china saiken pumps, and it is the most advanced type of diaphragm pumps in market for the moment. It adopts three-way air pilot valve to achieve real no dead stop and faster reversing. Compared with other traditional domestic pumps, it has larger flow rate, more stable operation, and smaller pulsation.

How to achieve energy saving and emission reduction of AODD pump

The AODD pump has a set of high suction energy-saving devices. The upper and lower ends are equipped with medium inlet pipes and outlet pipes, which are connected through the column partition, intermediate and air inlet pipe, and the air inlet pipe is connected with the air source input pipe and in turn It is connected with the air inlet of the Air operated double diaphragm pump through a manual ball valve, an air filter pressure regulating valve and a leakage ball valve. The intermediate components of the pump include the structure of the column diaphragm, diaphragm, air valve, etc. The airflow passes through the main air inlet to the intermediate air valve, and then from the intermediate air valve through the water vapor lubrication hole, and then from the intermediate air valve It flows out from the vent hole, and through the coordination of other components, the reciprocating action of the diaphragm is produced to realize the main work of the diaphragm pump. This product uses water vapor to lubricate itself and can work continuously for a long time. At the same time, it can realize automatic heat dissipation without lubrication, no jamming, and convenient maintenance; the connection between the column partition support and the diaphragm has good sealing and firmness Good, it can prevent the liquid from contacting the central shaft, and there is no danger of flammability and explosion. The pneumatic diaphragm pump can be used for sodium and other highly corrosive acidic media and chemical media; between the column diaphragm row and the intermediate valve The installation stability is high, which prolongs the service life of the pneumatic diaphragm pump during operation.

AODD pump manufacturers and suppliers from China

How to calculate the flow rate of the gear pump

How to calculate the flow rate of the gear pump:

The displacement V of a gear pump is equivalent to the sum of all tooth valley volumes of a pair of gears. If the tooth valley volume is roughly equal to the volume of the gear teeth, then the displacement of the gear oil pump is equal to the sum of the tooth valley volume and the tooth volume volume of a gear. It is equivalent to the annular volume swept by the plane formed by the effective tooth height (h=2m) and tooth width, namely:

V =πDhB = 27πzm²B

In the formula: D is the gear index circle diameter, D=mz (cm); h is the effective tooth height, h=2m (cm); B is the gear width (cm); m is the gear module (cm); z is Number of teeth.

In fact, the volume of the tooth valley is slightly larger than the volume of the tooth, so π in the above formula is often replaced by 3.33, then the formula (3-10) can be written as:

V=6.66zm²B

The flow rate q(1/min) of the gear oil pump is:

q=6.66zm²Bηv-3 X10

In the formula: n is the gear oil pump speed (rpm); ηv is the volumetric efficiency of the gear oil pump.

In fact, the oil delivery volume of the gear oil pump is pulsating, which means the average oil delivery volume of the pump.

It can be seen from the above formula that the relationship between flow and several main parameters is:

(1) The oil delivery volume is proportional to the square of the gear modulus m.

(2) When the volume of the pump is constant, the number of teeth is small, the modulus is large, so the oil delivery volume increases, but the flow pulsation is large; when the number of teeth increases, the modulus is small, the oil delivery volume decreases, and the flow pulsation is also small. For low-pressure gear oil pumps on machine tools, take z=13～19, and for medium-high pressure gear oil pumps, take z=6～14, and when the number of teeth z<14, make corrections.

(3) The oil delivery volume is proportional to the tooth width B and the speed n. Generally the tooth width B=(6～10)m; the speed n is 750r/min: 1000r/min, 1500r/min. If the speed is too high, it will cause insufficient oil absorption, and the pump will not work normally if the speed is too low. Generally, the larger circumferential speed of the gear should not be greater than 5-6m/s.

https://www.saikenpumps.com/Plastic-Magnetic-Drive-Pump/

Gear pump manufacturers and suppliers from China

Precautions for magnetic pump

Precautions for magnetic pump:
　
　　1. To prevent the particles into

　　 (1) does not allow any ferromagnetic impurities, particles into the magnetic actuator and the bearing friction pair. (2) The transmission medium easy to crystallize or precipitate after going to the timely processing (after the pump stopped pumping cavity infusion of water, running clean emissions after 1min) in order to protect the life of sliding bearings. (3) transport medium containing solid particles should be filtered at the entrance to the pump flow tube.

　
　　2. To prevent the demagnetization

　　
　　(1) magnetic moment can not be designed too small. (2) should be run under the specified temperature conditions, the temperature exceeded medium is strictly prohibited. Magnetic pumps can be installed in the outer surface of isolated sets of platinum resistance temperature sensor detecting temperature annulus region in order to overrun when the temperature alarm or shut down.

　
　　3. Prevention of dry friction

　　
　　(1) idling is strictly prohibited. (2) The medium is strictly prohibited for taking the time. (3) In the case of export of valve closure, pump continuous operation time of no more than 2min, to prevent overheating and loss of magnetic actuators.

Magnetic pump manufacturers and suppliers from China

The correct selection method of magnetic pump

Based on the current status of domestic magnetic pump production and the development of magnetic materials and sliding bearings, in order to ensure the quality of the project, the following steps can be used when selecting magnetic pumps.

1. For pumps whose power is less than 10KW, the use of magnetic pumps can ensure the use effect.
2. When the shaft power of the pump is greater than 10KW or the temperature of the medium is higher than 100°C, the domestic magnetic pump should be handled carefully. The material of the magnetic steel and the structure of the bearing material should be restricted, and the canned pump should be selected if necessary.
3. At present, domestic magnetic drive pump manufacturers are generally medium and small factories, and the development and research methods are relatively weak. For pumps that exceed the range of product parameters, it is generally not appropriate to entrust the manufacturer to research or develop them to ensure the quality and progress of the project.
4. The quality of the magnetic steel material is related to the life, reliability and price of the pump. When ordering, the magnetic steel material, the supplier and its performance indicators should be clarified. The material and life of the sliding bearing should also be clarified.

Magnetic drive pump manufacturers and suppliers from China

Gear pump working principle application industry

Performance characteristics

The gear pump adopts involute gears or arc gears. Generally have a safety valve. Gear oil pump is suitable for conveying lubricating and non-corrosive oils and other liquid media, and suitable for conveying high-lift media. The gear oil pump is lubricated by the conveyed medium. The advantage is that the medium is not demanding. The general pressure does not exceed 6MPa. It has the characteristics of self-priming, uniform flow and reliable operation.

Working principle

The gear oil pump is a positive displacement rotary pump. The work is accomplished by installing two gears of the same size in the casing to mesh and rotate. One driving wheel and one driven wheel. The two ends of the gear are sealed by the front and rear covers. The gear divides the inside of the pump casing into two. There are two independent working chambers, namely the suction chamber and the discharge chamber. The driving gear of the gear oil pump drives the driven gear to rotate during delivery. When the gear is disengaged, the volume of the chamber gradually increases. A partial vacuum is formed in the suction chamber, and the liquid is sucked in. The liquid fills the teeth of the gear and is brought to the discharge cavity. When the gear enters the mesh, the volume gradually decreases to form a high-pressure liquid and discharge it out of the pump through the pump discharge port. According to the continuous rotation and meshing of the gears, the liquid is continuously discharged to complete the conveying work.

The scope of use

Gear oil pumps are widely used in petroleum, chemical, shipbuilding, electric power, grain and oil, food, medical, building materials, metallurgy and other industries. Gear oil pumps are not suitable for conveying solid particles, fibers, and corrosive media. They are suitable for conveying lubricating oil with a temperature below 180°C and a viscosity between 5 and 1500 cst or other liquids with similar properties. It is suitable for all kinds of occasions where heat preservation is required in the process of outdoor installation in alpine areas with solidification at room temperature. Gear oil pumps are relatively cost-effective.

Gear pump manufacturers and suppliers from China

Applicable occasions of AIR OPERATED DOUBLE DIAPHRAGM PUMP

Because the AIR OPERATED DOUBLE DIAPHRAGM PUMP has the above characteristics, the pneumatic diaphragm pump has gradually invaded the market of other pumps since its birth, and occupied a part of the AODD PUMP. For example, pneumatic diaphragm pumps in the painting and ceramic industries have an absolute dominant position, while in some other industries, such as environmental protection, wastewater treatment, construction, sewage, and fine chemical industries, it is expanding its market share and has other pumps. Alternative status.

Pneumatic diaphragm pump is a new type of conveying machinery, and it is currently the most novel type of pump in China. Using compressed gas as the power source, all kinds of corrosive liquids, liquids with particles, high-viscosity, volatile, flammable, and highly toxic liquids can be exhausted by light extraction. The pneumatic diaphragm pump has six materials: plastic, aluminum alloy, cast iron, stainless steel, perfluorinated, and steel lined with PTFE. The pneumatic diaphragm pump adopts nitrile rubber, neoprene rubber, fluorine rubber, polytetrafluoroethylene, polyhexaethylene according to different liquid media. To meet the needs of different users. It is installed in various special occasions and used to pump various media that cannot be pumped by conventional pumps, and has achieved satisfactory results.
1. Due to the use of gas as power, the flow rate is actively adjusted with the change of back pressure (outlet resistance), which is suitable for medium and high viscosity fluids. The operating point of the centrifugal pump is set based on water. If it is used for a fluid with a slightly higher viscosity, it must be equipped with a reducer or a frequency converter, which greatly increases the cost, and the same is true for gear pumps.
2. It is reliable and low-cost to use pneumatic pumps in flammable and explosive environments, such as the transportation of fuel, gunpowder and explosives, because:
First, it is impossible to produce sparks after grounding;
Second, there is no heat generation during work, and the machine will not overheat;
Third, the fluid will not overheat, because the pneumatic diaphragm pump has the least agitation to the fluid.
3. In the harsh center of the construction site, such as construction site, industrial and mining wastewater discharge, due to the large amount of impurities in the sewage and the complex composition, the pipeline is easy to be blocked, which creates an environment with excessive load on the electric pump, and the motor is easily damaged by heat. The pneumatic diaphragm pump can pass particles and has an adjustable flow rate, and will automatically stop when the pipeline is blocked.
4. In addition, the pneumatic diaphragm pump is small in size, easy to move, does not require foundation, has a small footprint, and is easy and economical to install. Can be used as a mobile material delivery pump.
5. In the treatment of hazardous and corrosive materials, the diaphragm pump can completely isolate the materials from the outside world.
6. Or in some experiments, ensure that no impurities contaminate the raw materials.
7. It can be used to transport fluids with relatively unstable chemical properties, such as photosensitive materials, flocculation fluids, etc. This is because the shear force of the diaphragm pump is low and the physical impact on the material is small.

AODD PUMP manufacturers and suppliers from China

You come to know about AIR OPERATED DOUBLE DIAPHRAGM PUMP

Introduce the AIR OPERATED DOUBLE DIAPHRAGM PUMP:
Pneumatic diaphragm pump is a new type of conveying machinery, and it is currently the most novel type of pump in China. Using compressed air as the power source, it can be used for various corrosive liquids.
The AODD PUMP has four materials: engineering plastics, aluminum alloy, cast iron, stainless steel, and fluoroplastics. The pneumatic diaphragm pump adopts nitrile rubber, neoprene rubber, fluororubber, polytetrafluoroethylene, polyhexaethylene, etc. according to different liquid media to meet the needs of different users. It is installed in various special occasions and used to pump various media that cannot be pumped by conventional pumps, and has achieved satisfactory results.

Diaphragm pump manufacturers and suppliers from China

Analysis of the types of AIR OPERATED DOUBLE DIAPHRAGM PUMP

Analysis of the types of AODD PUMP

AIR OPERATED DOUBLE DIAPHRAGM PUMP, also known as control pump, is the primary type of actuator. After receiving the control signal from the modulation unit, the flow of the fluid can be changed through power operation. Diaphragm pumps are generally composed of actuators and valves. With compressed air as the power source, it can pump all kinds of corrosive liquids, granular liquids, high viscosity, volatile, flammable, and highly toxic liquids.
Pneumatic diaphragm pump has four kinds of materials: plastic, aluminum alloy, cast iron and stainless steel. There are four kinds of materials for electric diaphragm pumps: plastic, aluminum alloy, cast iron, and stainless steel. Diaphragm pumps use nitrile rubber, chloroprene rubber, fluorine rubber, polyvinylidene fluoride, and polytetrahydroethylene according to different liquid media. To meet demand. Placed in various special occasions, it is often used for pumping medium that cannot be pumped. Diaphragm pumps can be divided into pneumatic, electric and hydraulic power according to the power of the actuator. They are pneumatic diaphragm pumps driven by compressed air, electric diaphragm pumps driven by electricity, electro-hydraulic diaphragm pumps driven by the pressure of liquid media (such as oil), as well as solenoid valves, electronic, intelligent, and field bus barriers, depending on their function And characteristics. Membrane pump. Diaphragm pumps have many varieties and different structures, but they are constantly updated and changed. Generally speaking, valves are universal. They can not only be matched with pneumatic actuators, but also with electric actuators or other actuators.
Category: Electro-pneumatic diaphragm pump-3 inch plastic electro-pneumatic diaphragm pump-A80 Verderair Almatec series adds the largest scale pump A80. The pump is a large-capacity design and consists of three parts: two compartments and a central body, operation and Easy to maintain. The import and export standard is DN80, the maximum flow rate is 48 cubic meters per hour, and the maximum particle size is 15mm.
Diaphragm pump, pneumatic diaphragm pump, peristaltic pump, hose pump, magnetic pump, Verderair Almatec has a wide range of applications, from the chemical to the food industry. Almatec small pumps are generally used for circulation and sampling, while large pumps are primarily used in the chemical and OEM markets. Pneumatic valve is an important part of pneumatic diaphragm pump. The patented A80 valve is completely free of metal, with high reliability and low noise. This unique design provides a continuous balanced load for the barrier without pressure difference, thereby prolonging the life of the barrier.
One, diaphragm pump selection
The valve body selection of the diaphragm pump is the most important link in the selection of the diaphragm pump. There are many types of valves for diaphragm pumps. The commonly used ones are straight-through single-seat, straight-through two-seat, angle, barrier, small flow, three-way, eccentric rotation, butterfly, sleeve, spherical, etc. 10 types. Before selecting a valve, carefully analyze the medium, process conditions and parameters of the control process, collect the data that meets the requirements, understand the requirements of the diaphragm pump system, and determine the type of valve used based on the collected data. When making specific choices, the following aspects can be considered:
(1) The shape and structure of the valve core are primarily based on the selected flow characteristics and unbalanced force.
(2) Wear resistance When the fluid medium is a suspension containing a high concentration of abrasive particles, serious conflicts will occur every time the valve core and valve seat are closed. Therefore, the flow of the valve should be stable, and the internal material of the valve should be hard.
(3) Because of the corrosiveness of the medium, under the condition of satisfying the conditioning function, try to choose a valve with a simple structure.
(4) When the temperature and pressure of the medium are high and change greatly, the valve core and seat materials should be used as the valve with little temperature and pressure change.
(5) Avoid flashing and cavitation only in liquid media. In the actual production process, flashing and cavitation not only affect the calculation of the flow coefficient, but also cause vibration and noise and shorten the service life of the valve. Therefore, flashing and cavitation should be avoided when selecting valves.
2. Selection of diaphragm pump
(1) The output force of the actuator, regardless of its type, is the effective force to overcome the load (mainly refers to the unbalanced force and unbalanced torque plus conflict, sealing force, gravity and other related forces). Therefore, in order to make the diaphragm pump work normally, the supporting actuator should be able to produce a satisfactory output force, overcome various resistances, and ensure high sealing performance and valve opening. Regarding dual-effect pneumatic, hydraulic and electric actuators, there is generally no reset spring. The magnitude of the effect has nothing to do with the direction of the effect. Therefore, the key to selecting an actuator is to find the maximum output force and torque of the motor. Regarding the single-effect pneumatic actuator, the output force is related to the valve opening, and the force on the diaphragm pump will also affect its movement characteristics. Therefore, it is necessary to establish a force balance in the entire opening range of the diaphragm pump.
(2) After the output power of the actuator is determined by the type of the actuator, the corresponding actuator is selected according to the requirements of the process environment. On-site explosion-proof requirements use pneumatic actuators, junction boxes are explosion-proof, and electric actuators cannot be used. If there is no explosion-proof requirement, pneumatic and electric actuators can be selected, but considering energy saving, electric actuators should be used as much as possible. In hydraulic actuators, its use is not as widespread as pneumatic and electric actuators, but its conditioning accuracy is high.