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Rotary vane pump structure features
Rotary vane pump in the structure can be divided into oil-sealed and oil-immersed two categories. Oil-immersed structure refers to the fuel tank is set on the pump body, the pump oil seals the role of exhaust valve, the pump by water or air-cooled. Most large pumps use this structure. Oil-immersed structure is the entire pump immersed in the pump oil, pump oil seal and cooling effect. Small pumps and direct use of this structure more. The pump body is the main body of the rotary vane pump. Its structure has three types: integral type, medium-pressure type and combined type. Among them, the integral structure requires high processing density and difficult to guarantee the concentricity between the two chambers in high and low vacuum level. Inlet type structure is high, the low vacuum chamber is a whole, the middle wall by the press pressure or after cooling into the simple structure, processing and assembly of small, but strict requirements of the size of the wall; modular structure of various parts easy to process, However, the processing side and more high precision, low rejection rate, good interchangeability, suitable for mass production. To ensure that the pump chamber and pump shaft seal seal lubrication, open a special pump on the oil circuit. Rotor and rotary vane pump core components. Rotor structure in three forms: one-piece, pressure sleeve and rotor disc. Among them, the monolithic structure of the workpiece and the assembly of small, but the rotary groove machining more difficult to achieve high precision, more suitable for large pump; two half-rotor pad to ensure that the rotary slot width, requiring higher machining accuracy, The assembly is more complicated; after the two rotor discs are fastened with the screws and the cone pins, a rotary groove is formed between the two rotor bodies. The structure parts are large, the processing and assembly volume is large, and the processing density is high. Rotor disc structure is the most common.