Sliding-vane-type oil delivery pump with springs

Abstract

The invention discloses a sliding-vane-type oil delivery pump with springs. The sliding-vane-type oil delivery pump comprises a rotor, an eccentric ring, sliding vanes, an oil delivery pump cover and the sliding valve springs. The rotor is installed on a driving shaft of a high-pressure oil pump, sliding grooves are formed in the outer circle of the rotor in an equidistant mode, one sliding vane which can move in the sliding groove is placed in each sliding groove, the sliding vane springs are installed between the bottoms of the sliding grooves and the sliding vanes, the sliding vanes sliding along the sliding grooves are tightly attached to the inner cavity wall of the eccentric ring, the eccentric ring is arranged on the outer edge of a whole body in a sleeved mode, and the eccentric ring is attached to the oil delivery pump cover, wherein the whole body is formed by assembling the rotor, the sliding vanes and the sliding vane springs. In the sliding-vane-type oil delivery pump with the springs, the sliding vanes slide along the sliding grooves, under the effect of centrifugal force, the sliding vanes run in the mode of being tightly attached to the inner wall of the eccentric ring, and when the centrifugal force is insufficient, the centrifugal force can be compensated through the effect of the sliding vane springs. The sliding-vane-type oil delivery pump overcomes the defect that the inner portion of a diesel engine leaks, the low-speed adaptability of the oil delivery pump is enhanced, and due to the fact that the requirement for element machining precision is not high, the product cost is lowered.

Description

technical field [0001] The invention belongs to the field of diesel automobile manufacturing, in particular to a component used in a high-pressure oil pump of a diesel engine. Background technique [0002] The high-pressure common rail system is a new type of electronically controlled fuel injection system for diesel engines, including high-pressure oil pumps, common rail pipes, fuel injectors, and electronic control units. Since the high-pressure common rail system needs to supply sufficient quantity and sufficient high-pressure diesel oil during the high-speed rotation of the diesel engine, and to control the oil intake to flexibly change with the needs of the diesel engine, an oil delivery pump is required to provide a pressure of 0.5 MPa for the high-pressure common rail system. [0003] At present, the general oil delivery pump is a gear oil delivery pump, such as the HPO pump of Japan's Denso Corporation and the CP3 pump of the German Ph. There is always this gap betw...

AI Technical Summary

Problems solved by technology

[0003] At present, the general oil delivery pump is a gear oil delivery pump, such as the HPO pump of Japan's Denso Corporation and the CP3 pump of the German Ph. There is always this gap between the shells, which causes internal leakage of diesel oil and reduces the efficiency of oil delivery; the processing accuracy of parts is extremely high, which is difficult to achieve with ordinary processing equipment

In recent years, although sliding vane oil transfer pumps have been introduced on the market, they are all large-scale and integrally structured, which cannot be used in high-pressure common rail systems, and have poor low-speed adaptability

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