Vane pumps for injection molding machines

Abstract

The invention discloses a vane pump suitable for injection molding machines, which includes a pump body, a transmission shaft is arranged in the pump body, a rotor is sleeved on the transmission shaft, a stator is arranged outside the rotor, and vane grooves are opened on the rotor. There are blades evenly distributed between the rotor and the stator, and the blades are located in the blade grooves. There are oil distribution plates on both sides of the rotor. The oil distribution plates include oil suction oil distribution plates and pressure oil distribution plates on both sides of the rotor. , The space between the stator, the vane and the oil distribution plate forms an oil cavity, and a lubricating oil hole is opened on the vane groove, and the lubricating oil hole is close to the side of the oil cavity. The invention provides a vane pump with a simple structure, which increases the continuity of the oil film on the surface of the vane, reduces the wear of the vane and the vane groove, reduces the noise, and is not easy to produce the phenomenon of biting the pump; it solves the problem of lubrication of the vane pump in the prior art The effect is not good, and the continuity of the oil film formed on the blade is not good, thereby accelerating the technical problem of the wear of the blade and the blade groove.

Description

technical field [0001] The invention relates to a vane pump, in particular to a vane pump applied to injection molding machines. Background technique [0002] As we all know, the hydraulic vane pump is the power source of the hydraulic system. It has the characteristics of low noise and high pressure, and is widely used in machine tools, plastic machines, leather machinery, forging machinery, engineering machinery and other fields. [0003] In the current patent documents, there are also many introductions about vane pumps. For example, the Chinese patent: "A vane pump (CN202441597U)", including pump body, pump cover, main shaft, pump core, oil distribution plate, fixed pump cover On the pump body, the inner cavity for the pump core and the oil distribution plate is formed between the pump body and the pump cover. Between them, one end face of the oil distribution plate is in close contact with the pump core, and a compression spring is set between the other end face of the...

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Problems solved by technology

[0007] At the same time, the present invention also provides a vane pump that can adapt to frequent shutdowns, allow vanes to reverse properly, reduce noise during reversal, and have a long service life; it solves the problem of vane pumps in the prior art. The pump structure is too complicated to allow the blades to reverse, the reverse noise is large, and the service life is affected by technical problems

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