皇冠信誉赌场

高温磁力泵

Overview of High Temperature Magnetic Pump >>
High temperature magnetic pump is a kind of non-contact torque transmission through magnetic transmission (magnetic coupling) to replace the dynamic seal with a static seal to make the pump completely leak-free. Because the pump shaft and the inner magnetic rotor are completely closed by the pump body and the isolating sleeve, the problems of "run, run, drip, leak" are completely solved, and the flammable, explosive, toxic and harmful media in the refining and chemical industry are leaked through the pump seal. The potential safety hazards have effectively guaranteed the physical and mental health and safety of employees.

The composition of high temperature magnetic pump >>
The high temperature magnetic pump is composed of a self-priming pump, a magnetic actuator, and a motor. The key components of the magnetic actuator are an outer magnetic rotor, an inner magnetic rotor, and a non-magnetic insulation sleeve.
1. Permanent magnets made of materials have a wide operating temperature range (-45-400 ° C), high coercive force, and good anisotropy in the direction of the magnetic field. Demagnetization does not occur when the same poles are close to each other. A good source of magnetic fields.
2. When a metal isolating sleeve is used for the isolating sleeve, the isolating sleeve is in a sinusoidal alternating magnetic field, and an eddy current is induced on a cross section perpendicular to the direction of the magnetic field lines and converted into heat.
3. Control of cooling lubricating fluid flow When the high-temperature magnetic pump is running, a small amount of liquid must be used to flush and cool the annular gap area between the inner magnetic rotor and the isolation sleeve and the friction pair of the sliding bearing. The flow rate of the cooling liquid is usually 2% -3% of the designed flow rate of the pump. The ring gap area between the inner magnetic rotor and the insulation sleeve generates high heat due to eddy current. When the cooling and lubricating fluid is insufficient or the flushing holes are not smooth and blocked, the temperature of the medium will be higher than the working temperature of the permanent magnet, which will gradually lose the magnetism of the inner magnetic rotor and make the magnetic actuator ineffective. When the medium is water or a water-based liquid, the temperature rise in the annulus region can be maintained at 3-5 ° C; when the medium is a hydrocarbon or oil, the temperature rise in the annulus region can be maintained at 5-8 ° C.


caliber
Head (m)
flow
Motor power (KW)
Speed (r / min)
Voltage (V)
Suction stroke (m)
Import (mm)
Exit (mm)
(L / min)
(M / h)
14TCG-5
14
10
5
20
1.2
0.12
2900
380/220
3
16TCG-8
16
12
8
25
1.5
0.18
380/220
3
20TCG-12
20
14
12
50
3
0.37
380/220
4
25TCG-15
25
20
15
110
6.6
1.1
380
4
32TCG-15
32
25
15
110
6.6
1.1
4
32TCG-25
32
25
25
110
6.6
1.1
4
40TCG-20
40
32
20
180
10.8
2.2
6
50TCG-25
50
40
25
240
14.4
4
6
50TCG-40
50
40
40
220
13.2
4
6
50TCG-50
50
40
50
130
7.8
5.5
6
65TCG-25
65
50
25
280
16.8
5.5
6
65TCG-35
65
50
35
450
27
7.5
6
80TCG-35
80
65
35
850
51
11
6
80TCG-50
80
65
50
850
51
15
6

4. Materials for sliding bearing magnetic pump sliding bearings include impregnated graphite, filled polytetrafluoroethylene, engineering ceramics, etc. 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 the engineering ceramics are very brittle and the coefficient of expansion is small, the bearing clearance must not be too small, so as to avoid a shaft accident.
Since the sliding bearing of the high temperature magnetic pump is lubricated by the conveyed medium, the bearing should be made of different materials according to different media and operating conditions.

High temperature magnetic pump advantages >>

1. No need to install foot valve and irrigation water.
2. The pump shaft is changed from a dynamic seal to a closed static seal, which completely avoids medium leakage.
3. No separate lubrication and cooling water required, reducing energy consumption.
4. From coupling transmission to synchronous drag, there is no contact and friction. The power consumption is small, the efficiency is high, and it has a damping effect, which reduces the impact of the motor vibration on the pump and the impact of the pump on the motor when cavitation vibration occurs.
5. When overloaded, the inner and outer magnetic rotors slip off relatively, which has a protective effect on the motor and pump.
6. When the driven parts of the magnetic drive are 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 generate eddy and magnetic losses under the action of the active rotor alternating magnetic field, which will cause the permanent magnet temperature to rise and the magnetic actuator to slip and fail.

Precautions for using high temperature magnetic pumps >>
1. Prevent particles from entering
(1) No ferromagnetic impurities or particles are allowed to enter the magnetic transmission and bearing friction pairs. (2) After transporting the medium that is easy to crystallize or precipitate, flush it in time (fill the pump cavity with clean water after stopping the pump, and drain it after running for 1 minute) to ensure the service life of the sliding bearing. (3) When conveying the medium containing solid particles, it should be filtered at the inlet of the pump flow pipe.
2. Prevent demagnetization
(1) The magnetic moment must not be designed too small. (2) It should be operated under the specified temperature conditions, and the medium temperature is strictly prohibited. A platinum resistance temperature sensor can be installed on the outer surface of the magnetic pump isolation sleeve to detect the temperature rise in the ring gap area, so as to alarm or stop when the temperature exceeds the limit.
3. Prevent dry friction
(1) Idling is strictly prohibited. (2) Evacuation of the medium is strictly prohibited. (3) With the outlet valve closed, the continuous running time of the pump must not exceed 2min to prevent the magnetic actuator from overheating and failing. 3. Cannot be used in systems with pressure. Because there is a certain system in the pump cavity of the magnetic pump and the "static bearing" is used in the magnetic pump, this series of pumps must never be used in a system with pressure. Negative pressure is not feasible.
(1) Because the cooling and lubrication of the magnetic pump bearings rely on the conveyed medium, dry running is absolutely forbidden. At the same time, no-load running caused by power failure and restarting during the middle of work is absolutely prohibited.
(2) If solid particles are contained in the conveyed medium, a filter screen should be added to the pump inlet: if it contains ferromagnetic particles, a magnetic filter should be added.
(3) The ambient temperature of the pump in use shall be less than 40 ° C, and the temperature rise of the motor shall not exceed 75 ° C.
(4) The medium to be transported and its temperature shall be within the allowable range of the pump material. The operating temperature of engineering plastic pumps is <60 ° C, the operating temperature of metal pumps is <100 ° C, the delivery suction pressure is not greater than 0.2MPa, the maximum working pressure is 1.6MPa, the density is not greater than 1600Kg / m3, and the viscosity is not greater than 30X10-6m2 / S. Liquid containing hard particles and fibers.
(5) For the conveying medium which is easy to precipitate and crystallize, it should be cleaned in time after use to drain the accumulated liquid in the pump.
(6) After 1000 hours of normal operation of the magnetic pump, the wear of the bearing and the end-face moving ring should be disassembled, and the consumables that should not be reused should be replaced.

Development of high temperature magnetic pumps >>
The Ministry of Industry and Information Technology announced the "Twelfth Five-Year Plan for Development of the Petrochemical and Chemical Industry" at the beginning of the year. With the construction and transformation of the petrochemical and chemical industry and the increase in production capacity, it will directly drive the demand for high-temperature magnetic pumps for chemical pumps.

According to incomplete statistics, this is why the high temperature magnetic pump has a large gap. The author visited a pump factory in Shanghai on the production process and market orientation of the magnetic pump. The person in charge of the factory explained to the author the key to the technology of high temperature magnetic pump production. This pump seems to have no complicated production process, but it can really achieve high temperature resistance and solve the problems of running, running, dripping, and leaking. Not every pump manufacturing company has the technology to do so. High temperature resistant magnetic pump has two cooling methods, air-cooled and water-cooled. The air-cooled type is relatively easy to solve, the water-cooled manufacturing process is relatively more difficult, and the manufacturing cost is also large. At the same time, the production process must meet the industry standards formulated by the Ministry of Chemical Industry and the petrochemical industry.

With the start of the construction of petrochemical plant projects in various parts of China, the demand for high-temperature magnetic pumps is getting stronger and stronger, and it will continue to grow compared to 2012. Market applications are mainly represented by TCG type high temperature resistant magnetic pumps and CQB-G type high temperature magnetic pumps. High temperature resistant magnetic pumps are widely used in petroleum refining, petrochemical and chemical industries and other places to transport special petroleum, printing and dyeing materials and other high temperature media. The pump has the characteristics of high safety, long service life and high degree of generalization. This pump is also known as a shaftless pump. It replaces the dynamic seal with a static seal, so that the flow parts of the pump are completely sealed. Due to the use of magnetic coupling transmission, it can replace the problems of running, running, dripping, leaking that the mechanical seal of the original mechanical pump has been unable to solve, eliminating the flammable, explosive, toxic and harmful media leaking through the pump seal in the petrochemical industry. Hidden safety hazards effectively ensure the physical and mental health and safety of employees. As a pump for the petrochemical industry, this pump should be the best product solution.

Market demand is the task practised by enterprises. During the "Twelfth Five-Year Plan" period, China will continue to increase the construction and transformation of the petrochemical industry, and the demand for various types of pump and valve products will continue to expand. As a series of special water pumps, high-temperature magnetic pumps should be combined with market demands. , Pay great attention to high temperature magnetic pumps, introduce advanced technology, improve manufacturing processes, increase production investment in high temperature magnetic pumps, actively participate in the construction of China's booming petrochemical projects, and contribute to China's economic construction.

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