15 tips for maintenance of magnetic drive pump

15 tips for maintenance of magnetic drive pump:

1) Check whether there is any looseness in the pipes and joints of the stainless steel magnetic pump. Turn the magnetic pump by hand to see if the magnetic pump is flexible.

(2) Add bearing lubricating oil to the bearing body, observe that the oil level should be at the center line of the oil mark, and the lubricating oil should be replaced or replenished in time.

(3) Unscrew the screw plug of the pump body of the magnetic pump, and fill with water (or slurry).

(4) Close the gate valve, outlet pressure gauge and inlet vacuum gauge of the outlet pipe.

(5) Jog the motor and try to see if the rotation direction of the motor is correct.

(6) Turn on the motor. When the magnetic pump is running normally, open the outlet pressure gauge and the inlet vacuum pump to see the proper pressure, then gradually open the gate valve, and check the motor load at the same time.

(7) Try to control the flow and head of the magnetic pump within the range indicated on the label to ensure that the magnetic pump runs at the highest efficiency point in order to obtain the greatest energy saving effect.

(8) During the operation of the magnetic pump, the bearing temperature should not exceed 35C, and the maximum temperature should not exceed 80C.

(9) If abnormal sound is found in the magnetic pump, stop immediately and check the cause.

(10) To stop using the magnetic pump, first close the gate valve and pressure gauge, and then stop the motor.

(11) During the first month of operation, the magnetic pump should change the lubricating oil after 100 hours, and then change the oil every 500 hours thereafter.

(12) Adjust the packing gland frequently to ensure that the leakage in the packing chamber is normal (it is better to leak out as a drip).

(13) Regularly check the wear of the shaft sleeve, and replace it in time when the wear is large.

(14) When the magnetic pump is used in the cold winter season, after stopping, unscrew the drain plug at the bottom of the pump body to drain the medium to prevent freezing and cracking.

(15) If the magnetic pump is out of service for a long time, it is necessary to disassemble all the pumps, wipe off the water, apply grease to the rotating parts and joints, and store them properly.

Magnetic drive pump manufacturers and suppliers from China

What basis is needed for the selection of magnetic drive pump?

The basis for the selection of magnetic drive pumps should be considered from five aspects according to the process flow and water supply and drainage requirements, including liquid delivery volume, device head, liquid properties, piping layout, and operating conditions.
1. Flow rate is one of the important performance data of magnetic drive pump, it is directly related to the production capacity and conveying capacity of the whole device. For example, in the process design of the design institute, the normal, minimum and maximum flow rates of the pump can be calculated. When choosing a magnetic pump, take the maximum flow rate into consideration and take into account the normal flow rate. When there is no maximum flow rate, 1.1 times the normal flow rate can usually be taken as the maximum flow rate.
2. The head required by the device system is another important performance data for pump selection. Metering pumps generally need to be enlarged by 5%-10% of the head to select the type.
3. Liquid properties, including the name of the liquid medium, physical properties, chemical properties and other properties. The physical properties include temperature c, density d, viscosity u, solid particle diameter and gas content in the medium, etc. This relates to the lift of the system, the effective gas Calculation of residual allowance and suitable pump type: chemical properties, mainly refer to the chemical corrosive and toxic rotor pump of the liquid medium. It is an important basis for the selection of pump materials and the type of shaft seal.
4. The piping layout conditions of the device system refer to the liquid delivery height and the liquid delivery distance from the liquid delivery direction, the lowest liquid level on the suction side, the highest liquid level on the discharge side, etc. Some data and piping specifications and their length, materials, pipe fitting specifications, and quantity Etc., in order to carry out the combing head calculation and cavitation allowance check.
5. There are many operating conditions, such as liquid operation T saturated steam power P, suction side pressure PS (absolute), discharge side container pressure PZ, altitude, ambient temperature operation is gap or continuous, and the position of the magnetic pump is The fixed or removable screw pump.

Magnetic drive pump manufacturers and suppliers from China

Magnetic drive pumps have become the main pump type of non-leakage pumps

Magnetic drive pumps have become the main pump type of non-leakage pumps

Magnetic drive pumps and canned motor pumps are collectively referred to as non-leakage pumps, or non-shaft seal pumps. Mainly used to transport toxic, flammable, explosive, volatile, corrosive, radioactive or valuable liquids. It is an important equipment for the chemical, petrochemical, pharmaceutical and other industries to meet environmental protection requirements and ensure the safe transportation of materials. In recent years, the sales of leak-free pumps worldwide have increased several times, and the market prospects are promising.
Canned motor pump is a non-leakage pump developed earlier and has matured in technology. For a long period of time, it has been the preferred pump type for non-leakage pumps and has a large market share. It has the advantages of no leakage, the motor and the pump are coaxial, the structure is compact, and there is no need to bring a common base.
Magnetic pumps appeared in the 1940s. Due to the poor performance of permanent magnetic materials at that time, only micro or small magnetic pumps could be developed. It was not until the emergence of samarium-cobalt magnetic materials in 1978 and the emergence of neodymium-iron-boron magnetic materials in 1983 that magnetic pumps developed rapidly. The magnetic performance of this new type of magnetic material is particularly high, so that the volume of the permanent magnet coupling can be made small, the air gap can be enlarged, and the manufacturing is convenient. Moreover, it adopts the universal Y series motor matching. Low, short delivery time, on-site inspection and repair, so it has become a strong competitive product of canned motor pumps. Although magnetic pumps and canned motor pumps share the non-leakage pump market, industry experts point out that: in all application areas of non-leakage pumps, magnetic pumps can completely replace canned motor pumps and become the main pump type of non-leakage pumps.

Magnetic drive pump manufacturers and suppliers from China

Operation precautions and maintenance methods of magnetic drive pump

Operation precautions and maintenance methods of magnetic drive pump

Preparation before operation of the magnetic drive pump

a Check whether the bolts and connectors of each part are loose, and tighten them if they are loose.

b Rotate the coupling by hand to make the pump rotor rotate a few times to see if the rotation is flexible, whether there is a sound or unevenness, to determine whether there is any foreign matter in the pump.

Startup procedure of magnetic pump

a Open the suction valve, close the drain valve, pressure gauge valve, and vacuum gauge valve to prime the pump.

b. Slightly open the discharge valve, jog the motor, and check the direction of the motor (clockwise from the direction of the motor).

c After the steering is correct, start the motor and open the pressure gauge and vacuum gauge valves.

d After the pressure rises and the machine is considered to be operating stably, slowly open the discharge valve and the pump will work normally.

The pump operating point should fluctuate up and down at the operating point. Too small or too large flow will easily cause damage to the pump.

Matters needing attention in the operation of magnetic pump

a. No-load operation of the pump is never allowed. Once the fluid is cut off or there is friction in the pump, stop the operation and switch the pump to prevent further damage to the pump due to no-load.

b If there is a medium that is easy to solidify in the pump, steam must be vented before starting the pump, and the pump can be started only after the medium is fully melted.

c During the test operation of the magnetic pump, check the entire system for air leakage and liquid leakage, whether the performance meets the requirements, whether the unit has large vibration and abnormal noise, and it can be put into operation after all aspects are deemed qualified.

Maintenance and maintenance of magnetic pump

Magnetic pumps must be well maintained and maintained in order to effectively exert the good performance of the pump and prolong the service life of the pump.

Monitoring and maintenance during operation

When the pump is in operation, it is necessary to strengthen the inspection of the unit, find abnormalities as soon as possible, and deal with them as soon as possible. In the inspection, generally pay attention to the following aspects at any time:

a. Pay attention to whether the sound and vibration of the unit are normal.

b. Observe whether the readings of the ammeter, power meter, pressure gauge, vacuum gauge and flow meter are normal.

c. Pay attention to whether the pipeline leaks or leaks.

d. Keep the unit clean at ordinary times and pay attention to operational safety.

Maintenance after operation

a. In the cold season, especially for pumps outdoors, the liquid in the pump should be removed immediately after stopping to prevent freezing.

b. The general standby pump should also be started at regular intervals.

c. Regular maintenance of magnetic pumps, inspection and replacement of unqualified wearing parts, such as bearings, shaft sleeves, thrust rings, etc.

d. Grease in the bearing box should be added regularly.

Magnetic drive pump manufacturers and suppliers from China

Operation when the magnetic drive pump medium is hydrocarbon or oil

Operation when the magnetic drive pump medium is hydrocarbon or oil

When the medium is hydrocarbon or oil, the temperature rise in the annulus area can be maintained at 5-8°C. Sliding bearing The material of the sliding bearing of magnetic pump includes impregnated graphite, filled PTFE, engineering ceramics and so on. Because engineering ceramics have good heat resistance, corrosion resistance, and friction resistance, the sliding bearings of magnetic pumps are mostly made of engineering ceramics. Because engineering ceramics are very brittle and have a small expansion coefficient, the bearing clearance must not be too small to avoid shaft hung accidents. Since the sliding bearing of the magnetic pump is lubricated by the conveyed medium, different materials should be used to make the bearings according to different media and operating conditions. 5. Protection measures When the driven part of the magnetic drive is running under overload or the rotor is stuck, the main and driven parts of the magnetic drive will automatically slip off to protect the pump. At this time, the permanent magnet on the magnetic actuator will produce eddy loss and magnetic loss under the action of the alternating magnetic field of the active rotor, which will cause the temperature of the permanent magnet to rise and the magnetic actuator to slip and fail.

PP Magnetic drive pump — Magnetic drive pumps have a particular sealless design that is suitable to pump corrosive and dangerous liquids thanks to the high chemical resistance and absence of leakage and emissions.

Magnetic drive pump manufacturers and suppliers from China

Basic knowledge of magnetic drive pump

Basic knowledge of magnetic drive pump

Magnetic gearbox centrifugal water pumps (collectively referred to as magnetic pumps) are based on the principle of magnetic kinematics. When the motor promotes the overall rotation of the outer stator (ie, the outer magnetic steel), the electric field turns over the guard sleeve to promote the inner stator (ie, the inner Magnet) The total distance and the wind wheel rotate at the same time. Because the organic matter is open in the uniform motion prevention cover, the purpose of pumping the organic matter without leakage is exceeded, and the shaft seal of the gear drive pump is prevented from leaking. Leaky, low-carbon and environmentally friendly industrial pumps. In addition, magnetic pumps are all used in the chemical process to prevent running, emitting, dripping, and leaking, eliminate environmental pollution, and create a “leak-free industrial zone” and a “leak-free factory” to maintain safety and the hope of civilian production.

The PP magnetic drive pump is used in the production process of petroleum, chemical, pharmaceutical, knitting factories, electric ferry, meat food, ecological environmental protection and other enterprises to transport toxic liquids that can contain iron and sludge. It is especially suitable for flammable, combustible, volatile, and hazardous materials. And transportation of precious liquids.

In the petrochemical manufacturing industry, more and more manufacturers require a leak-free process environment for the organic matter they transport. In some unique places, such as the transportation of oil or particulate organic matter (such as wastewater treatment) , And in the chemical production process, it is more tightly focused on choosing the desired leak-free pump type. The magnetic gearbox high temperature multi-stage pump and the magnetic pump product series with mixed-liquid separation equipment solve the bottleneck of the development of high temperature (350°C) transportation and particulate organic matter that the basic magnetic pump cannot solve from the beginning to the end. It can immediately replace the gear-driven IH type Chemical pump. The magnetic pump has undergone long-term scale-up and continuous operation and tempering, and customers can firmly believe that they are using safe and reliable pumps.

The principle of gearbox The magnetic drive pump is a new type of pump that uses a structural design with a magnetic coupling to transmit torque without contact. When the motor promotes the rotation of the outer magnetic stator, the electromagnetic field promotes the inner magnetic stator and the wind wheel to rotate simultaneously. So beyond the purpose of pumping liquid, because the liquid is opened in the uniform movement of the guard sleeve, so it is this kind of closed, leak-free pump type.

Second, the characteristics of magnetic pump

The mechanical seal of the pump is cancelled, and the shortcomings of mechanical seal centrifugal water pump, dripping and leakage are completely eliminated. It is a leak-free factory. Because the pump’s overflow support is made of stainless steel, rubber and plastic products, it exceeds the purpose of corrosion resistance. The magnetic coupling of the pump and the pump casing are integrated, so the structure is compact, the maintenance is convenient and fast, and it is safe and energy-saving. The accidental running and venting couplings of the pump with magnets can protect the gearbox motor from overload.

Third, the use of magnetic pump

The magnetic pump is widely used in petroleum, chemical, pharmaceutical, electric ferry, ecological and environmental protection, water purification, film printing, civil defense and other enterprises to pump flammable, combustible, Hazardous and precious liquids are the hopeful pumps for creating non-leakage, low-carbon and environmentally friendly Wenmin Industrial Zones and Wenmin factories.

Four, magnetic pump work specifications

The strength of the magnetic pump to transport organic matter is not more than 1300kg/m3, and the viscosity is not more than 30×10-6m3/S, which may contain ferromagnetic and viscous liquids. The rated temperature of the basic magnetic drive pump is metal or F46 lining for the pump casing. The maximum operating temperature is 80°C and the rated water level is 1.6MPa; the operating temperature of the high-temperature magnetic pump is ≤350°C; for the pump casing made of silicon carbide, the higher The maximum temperature does not exceed 60℃, and the rated water level is 0.6MPa.

For liquids whose organic strength exceeds 1600kg/m3, a magnetic coupling can be designed. The bearing shaft of the magnetic pump is moistened and cooled with the organic matter being transported, and the magnetic drum pump is generally strictly prohibited to operate with full load.

Installation and application method of magnetic drive pump

Installation and application method of magnetic drive pump

The magnetic pump is suitable for installation in a horizontal orientation. Try not to bear a large net weight of water pressure. If the vertical installation must be carried out due to bad conditions or required restrictions, the motor must face upwards.
When the liquid side of the suction liquid is higher than the roller axis, the small part of the pipeline must be opened first; furthermore, if the liquid drawn is lower than the roller axis, a bottom valve must be arranged on the pipeline.
The PP magnetic drive pump should be inspected before work to see if the motor is operating smoothly and smoothly, if there is any abnormal noise, and if the firmware of each connection is loose, to ensure its safe operation.
Inquire whether the rotation position of the motor is the same as the marked brake.
After the motor is running, slowly and steadily open the drain valve, and after the facility enters the working attitude, adjust the drain valve to the required opening.
When the operation is to be terminated, the drain gate valve must be closed first, and then the suction pipe gate valve must be closed. The sequence cannot be mistaken.

The principle of 304 Air operated double diaphragm pump

The principle of 304 Air operated double diaphragm pump:
A diaphragm is installed on the left and right sides of the aodd pump, which are connected by a central link. Compressed air enters the air distribution valve from the air inlet of the pump, and the compressed air is introduced into one cavity through the air distribution mechanism to push the diaphragm in the cavity to move, while the gas in the other cavity is discharged. Once the end of the stroke is reached, the air distribution mechanism automatically introduces compressed air into another working chamber, pushing the diaphragm to move in the opposite direction, so that the two diaphragms reciprocate continuously and synchronously. In the figure, compressed air enters the valve to move the diaphragm to the right. The suction of the chamber causes the medium to flow in from the inlet, pushing the ball valve into the chamber, and the ball valve is blocked by suction; the medium in the chamber is squeezed. Push open the ball valve to flow out from the outlet, and at the same time lock the ball valve to prevent flow, so that the medium is continuously sucked in from the inlet and discharged from the outlet.

aodd pump manufacturer and supplier from China

Why can’t the magnetic drive pump idling? How to maintain?

Magnetic drive pumps are also called magnetic drive pumps, which are mainly made of engineering plastics or stainless steel. It plays an important role in machinery manufacturing. Friends who have used magnetic pumps for a long time know that magnetic pumps cannot be idling. So why can’t it be idling? Let us analyze it together today!

If you have ever understood the structure of magnetic pumps, then you must know that engineering plastic magnetic pumps have magnetic cylinders. What is the cooling of the magnetic cylinder? In fact, it is the medium relying on the magnetic pump. If the magnetic pump is in an idling condition, it will affect the normal state of the magnetic cylinder. It may cause the magnetic cylinder to lock up, and then cause the magnetic drive pump to work abnormally.

Restricted pump opening

For a magnetic pump to work, it must be lubricated. So, how to lubricate? It is actually the medium of the magnetic pump. If there is no magnetic pump medium, the magnetic pump will face the problem of difficulty in starting the pump.

High temperature demagnetization

The design and working principle of the magnetic pump have a certain connection with the magnetic field, so everyone must ensure the stability of the magnetic field. When the magnetic pump is idling, the temperature of its core components will increase, and high temperature will have a certain effect on the magnetic field, which will cause demagnetization. In addition, you have to know that the outer magnetic assembly and the inner magnetic assembly are the main components of the magnetic pump.

Why can’t the stainless steel magnetic pump run idling? After listening to the introduction of the editor, I think you should have a good idea. The above is the answer that the editor will bring to you today. No matter what kind of magnetic pump, no matter what kind of equipment, it has a certain service life. If you want to extend the service life, you must maintain and maintain it in time in daily life. So, how to maintain the magnetic pump? First, we must ensure that the magnetic pump is not cut off, and there can be no impurities in the magnetic pump. If the magnetic pump violates any of the above two taboos, it will cause certain damage to the bearing. The bearing is an important component of the magnetic drive pump. If it is affected, it will definitely shorten the life of the magnetic drive pump. Second, we need to pay attention to the proportion of liquid to be transported. If the proportion of liquid to be transported is too large, it will lead to insufficient head. In addition, damage to the impeller or a certain amount of air in the conveying medium can also cause this phenomenon. I hope everyone can try to avoid it. Third, we should always check the suction pipe of the magnetic pump to see if there is any air leakage. Especially when the magnetic pump can not pump liquid, pay more attention to this problem.
Magnetic drive pump manufacturers and suppliers from China

‪What is a magnetic pump_the working principle of a magnetic drive pump

What is a magnetic drive pump, the principle of a magnetic pump, and the working principle of a magnetic pump:

What is a magnetic pump A magnetic pump is a centrifugal pump with a magnetic coupling, also called a magnetic coupling pump, or a magnetic pump for short.
Working principle of magnetic pump The magnetic pump is in operation. It may cause leakage due to insufficient sealing of the isolation sleeve, so for safety reasons. Sometimes it is necessary to install a double-layer isolation shielded magnetic coupler with leakage display to transmit power to the centrifugal pump. It consists of an outer magnetic rotor and an inner magnetic rotor: the outer magnetic ball is fixedly connected to the motor bearing. The inner magnetic rotor is mounted on the bearing together with the impeller. Both the outer magnetic rotor and the inner magnetic rotor are equipped with permanent magnets, and they face each other with different magnetic poles. With the help of magnetism, the division attracts each other. When the outer magnet rotates and runs, the inner magnet rotor also runs synchronously (same speed). Centrifugal pumps with magnetic couplings are also called electromagnetic pumps or magnetic pumps, and their power can now reach about 400kW. As the torque that needs to be transmitted increases, the rotor angle between the shaft and the magnet also increases. If the torque that needs to be transmitted exceeds the maximum range (breaking torque). Then, the coupler will lose its function and the inner magnetic rotor will stop running. under these circumstances. The engine must be shut down and restarted to resume synchronous operation. For cage asynchronous motors. There is no such problem (although for centrifugal pumps, if the measurement is correct, this problem will not occur during operation). Because its running and starting can be performed asynchronously. By installing a spacer sleeve in the gap between the outer magnetic rotor and the inner magnetic rotor (for complete consideration, sometimes two layers may be required). The water pump can be completely sealed. The application of a centrifugal pump driven by an electromagnetic coupler is similar to that of a canned motor pump.

The above is the working principle of the magnetic pump, and the magnetic coupler should not be confused with the electromagnetic coupler. Electromagnetic couplers are used to switch or provide protection against shock loads.
Magnetic drive pump manufacturers and suppliers from China