GERMANY KAYSEN PUMP CO .,LTD
The vane pump is a pump in which the vane in the rotor groove is in contact with the pump casing (stator ring), and the sucked liquid is pressed from the oil inlet side to the drain side.
When the vane pump rotor rotates, the vane is pressed against the inner surface of the stator under the action of centrifugal force and pressure oil. The working volume formed by the two blades and the inner surface of the rotor and the stator is firstly drained from small to large and then drained from large to small. When the blade rotates for one week, the oil absorption and the oil discharge are completed.
First, the working principle of single-acting vane pump
The pump consists of rotor 1, stator 2, vane 3, oil distribution plate and end cover. The inner surface of the stator is a cylindrical hole. There is an eccentricity between the rotor and the stator. The blade can flexibly slide in the groove of the rotor. Under the action of the centrifugal force of the rotor rotating and the pressure oil flowing into the blade root, the blade top is closely attached to the inner surface of the stator, so that two adjacent blades, the oil distribution plate, the stator and the rotor A sealed working chamber is formed between the two. When the rotor rotates in the counterclockwise direction, the blades on the right side of the figure protrude outward, and the volume of the sealed working chamber gradually increases to generate a vacuum, so that the oil is sucked through the suction port 6 and the window on the oil distribution plate 5. And on the left side of the figure. The blade is retracted inward, the volume of the sealed cavity is gradually reduced, and the oil in the sealed cavity is pressed out through the other window of the oil distribution plate and the pressure port 1 and outputted to the system. In the process of turning the rotor one turn, the pump sucks oil and pressure each time, so it is called single-acting pump. The rotor is subjected to radial hydraulic imbalance, so it is also called unbalanced pump, and its bearing load is large. By changing the amount of eccentricity between the stator and the rotor, the displacement of the pump can be changed, so the pumps are variable pumps.
Second, the working principle of double-acting vane pump
Its principle of action is similar to that of a single-acting vane pump. The only difference is that the stator surface is composed of two long-radius arcs, two short-radius arcs and four sections of transition curves, and the stator and rotor are concentric. . In the case where the rotor of the illustrated rotor rotates clockwise, the volume of the sealed working chamber gradually increases at the upper left and lower right corners, which is the oil absorption zone, which gradually decreases in the lower left corner and the upper right corner, and is the oil pressure zone; the oil absorption zone There is a section of oil seal between the oil and pressure zones to separate them. Each time the rotor of the pump rotates once, each sealed working chamber completes the oil suction and oil pressure operations twice, so it is called a double-acting vane pump. The two oil suction zones and the two oil pressure zones of the pump are radially symmetrical, and the hydraulic pressure acting on the rotor is radially balanced, so it is also called a balanced vane pump.
The instantaneous flow of the double-acting vane pump is pulsating, and the pulsation rate is small when the number of vanes is a multiple of four. For this reason, the number of blades of the double-acting vane pump is generally 12 or 16.
In addition to anti-drying and overloading, anti-inhalation air and suction vacuum, the management points of the vane pump should also pay attention to:
● If the pump is changed in direction, the suction and discharge direction also changes the vane pump to have the specified steering, and it is not allowed to reverse. Because the rotor groove is inclined, the blade is chamfered, the bottom of the blade is connected to the oil discharge chamber, and the throttle groove and the suction and discharge ports on the oil distribution plate are designed according to the predetermined steering. Reversible vane pumps must be specially designed.
●The vane pump is equipped with the positioning pin of the oil distribution plate and the stator. The vane, rotor and oil distribution plate are not reversed. The suction part of the inner surface of the stator is most vulnerable to wear. If necessary, it can be flipped over to make the original suction zone. Become a drain and continue to use.
● Disassembly and assembly Note that the working surface is clean and the oil should be well filtered during operation.
● The gap between the blades in the groove is too large, which will increase the leakage. If it is too small, the blades will not be able to expand and contract freely, which will lead to malfunction.
● The axial clearance of the vane pump has a great influence on ηv.
●Small pump -0.015～0.03mm
● Medium pump - 0.02 ~ 0.045mm
● The temperature and viscosity of the oil should not exceed 55 °C, and the viscosity should be between 17 and 37 mm2/s. If the viscosity is too large, oil absorption is difficult; if the viscosity is too small, the leakage is serious.
The main advantage:
● small size
● Smooth operation
●Output flow uniformity
●Water conservancy project
●Drilling machines, bulldozers, cranes, loaders, excavators, road rollers
● Machine tool
●Concrete mixer truck
● Mining industry
● Oil field
The Kaysen Pumps GmbH in Schw?bischGmünd, Germany, is one of the world's leading manufacturers of fluid centrifugal pumps and diaphragm pumps. For more than 60 years, Kaisen has achieved the highest standards of reliability and quality of "Made in Germany". With our comprehensive product portfolio, we support customers around the world to successfully grasp the harsh pumping tasks of water supply, mining, industry, chemical, paper, electricity, food, pharmaceutical, sewage and marine industries. As a leading provider of innovative technology in these areas, we are the perfect partner for liquids to be safe, efficient and economical to transport. ,
Germany Kaysen always adhere to the "quality, stresses credibility" for the purpose. Products are selling all over the country, and has gradually developed overseas markets. The company has repeatedly been rated as "the contract with the letter" business, won the trust of users and extensive praise.