Servo energy-saving internal rotation type gear pump

Abstract

The invention discloses a servo energy-saving internal rotation type gear pump, comprising a pump body, a front cover arranged at the front end of the pump body, and a rear cover arranged at the rear end of the pump body. The front cover is provided with an oil inlet and an oil inlet channel. When a fluid is sucked into a cavity of the pump body from the oil inlet through the oil inlet channel or when a high-pressure fluid discharged from the cavity of the pump body through the oil outlet channel reaches an oil outlet, the fluid does not need to pass through a through hole in an inner gear ring, and turbulent flow obstruction cannot be formed; the fluid output by the oil outlet is the high-pressure fluid which flows out of the cavity of the pump body and is guided into the oil outlet in the direction parallel to the axial direction of an outer gear shaft through an oil outlet channel; the high-pressure fluid formed by pressing can pass through the side wall of the cavity of the pump body and quickly flow out of the oil outlet channel and the oil outlet in a large amount, and the pressure and flow of the fluid can be stably output; and in particular, the excellent performance of the servo energy-saving pump at high pressure and low rotating speed is improved.

Description

technical field [0001] The invention relates to the technical field of pump equipment, in particular to a servo energy-saving internal rotation gear pump. Background technique [0002] The patent authorization publication number is CN203627218U, which discloses an internally rotating gear pump, which uses a mandrel to drive the gear shaft in the pump body, and then uses the partial meshing relationship between the gear shaft and the ring gear to drive the ring gear to rotate synchronously. During the rotation of the two, fluid (such as hydraulic oil) can be sucked into the chamber of the pump body from the oil inlet, and then the pressurized fluid can be discharged out of the chamber from the oil outlet. However, the chamber of this internally rotating gear pump The inner wall of the chamber is concavely provided with a high-pressure oil tank, and a plurality of through holes are provided on the peripheral surface of the inner ring gear, and a pressure retainer is used to di...

AI Technical Summary

Problems solved by technology

[0002] The patent authorization publication number is CN203627218U, which discloses an internally rotating gear pump, which uses a mandrel to drive the gear shaft in the pump body, and then uses the partial meshing relationship between the gear shaft and the ring gear to drive the ring gear to rotate synchronously. During the rotation of the two, fluid (such as hydraulic oil) can be sucked into the chamber of the pump body from the oil inlet, and then the pressurized fluid can be discharged out of the chamber from the oil outlet. However, the chamber of this internally rotating gear pump The inner wall of the chamber is concavely provided with a high-pressure oil tank, and a plurality of through holes are provided on the peripheral surface of the inner ring gear, and a pressure retainer is used to divide the chamber into a high-pressure chamber and a low-pressure chamber. Both the oil inlet and the oil outlet are arranged on the inner wall of the chamber of the pump body, and the oil inlet and the oil outlet are both arranged to face the mandrel. When the fluid enters the chamber from the oil inlet, it must first flow The low-pressure area enters the inner ring gear through the through hole on the ring gear and the low-pressure area on both sides of the ring gear, and then enters the high-pressure area formed between the outer side of the inner ring gear and the oil groove from the inner ring gear to the outside, and finally Flow out to the oil outlet, because the oil outlet is located in the radial direction of the spindle, the fluid entering and leaving the gear pump needs to pass through the through holes provided on the peripheral surface of the inner ring gear twice. If impurities are mixed into the chamber of the pump body, it will easily cause scratches on the pressure barrier area of ​​the inner wall of the high-pressure chamber, resulting in the problem that the pressure of the fluid output from the oil pump cannot be increased in the high-pressure oil tank and the fluid flow will be lost, and then the function of the oil pump will be lost. A kind of internal rotation gear pump fails to convey fluid smoothly

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