Novel gear pump with non-full-tooth gears

Abstract

The invention relates to a novel gear pump with non-full-tooth gears. The three non-full-tooth gears, namely, the main gear, the driven gear I and the driven gear II are mounted in a pump body. Four teeth are mounted on the outer edge of the main gear, and two tooth grooves are formed in the outer edge of each driven gear. In the rotating process, two teeth of the main gear are engaged with one gear groove of the driven gear I and one tooth groove of the driven gear II. The novel gear pump has the beneficial effects that the engagement frequency is low, the process is short, and the volume of an oil suction and drainage cavity is large; the pump can directly rotate reversely to be used, self-priming performance is good, and the compression ratio is large; a gear tooth and tooth groove manner can be changed; a bearing of the main gear can be protected; the diameter of a main gear disc is reduced, the tooth height of the main gear disc is correspondingly increased, the diameter of the driven gears is correspondingly changed, and it is guaranteed that after two gears are sealed in a contact manner, the suction amount can be increased, and the novel gear pump can be used as a low-pressure high-flow pump; and the diameter of the main gear disc is increased, the tooth height is correspondingly reduced, the diameter of the driven gears is correspondingly changed, and it is guaranteed that after two gears are sealed in the contact manner, the novel gear pump can be used as a high-pressure low-flow pump.

Description

technical field [0001] The invention relates to the technical field of hydraulic mechanical equipment, in particular to a novel gear pump with non-full teeth gears. Background technique [0002] In terms of terminology, the gear pump is also called a positive displacement device, that is, like a piston in a cylinder, when one tooth enters the fluid space of the other tooth, the liquid is mechanically squeezed out. Because the liquid is incompressible, the liquid and the teeth cannot occupy the same space at the same time, so that the liquid is excluded; this phenomenon occurs continuously due to the continuous meshing of the teeth, and thus provides There is a continuous discharge volume, and the discharge volume is the same every time the pump rotates. With the uninterrupted rotation of the drive shaft, the pump will discharge fluid uninterruptedly. [0003] The most basic form of a gear pump is that two gears of the same size mesh with each other and rotate in a tightly f...

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Problems solved by technology

[0004] It can be seen from the above that the existing gear pumps complete the oil suction and oil discharge process through the continuous meshing of the gears to provide hydraulic pressure. In this case, it needs to be pointed out that the tooth slot cavity of the full-toothed gear is small, resulting in low suction negative pressure and low discharge pressure. , the full-toothed gears are always in the meshing state to generate pulsation, and the high-speed rotation of the gears produces centrifugal force, which affects the oil absorption and supercharging effect of the cogging, especially in the case of high pressure, the radial force on the gear is large, which greatly shortens the gear bearing. At the same time, although the performance of the existing plunger pump is better than that of the gear pump, the structure is complicated, the wear parts are many, and the cost is high

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