Inside engaged gear pump or gear motor device with multilayer structure

Abstract

The invention relates to an inside engaged gear pump or gear motor device with a multilayer structure. The device comprises an inner rotor, N layers of double-faced toothed ring sleeves, an outer rotor and a pump body, wherein N is a positive integer more than or equal to 1; the inner rotor, the double-faced toothed ring sleeves and the outer rotor are sequentially arranged in the pump body from inside to outside; the tooth faces of the inner rotor, the N layers of double-faced toothed ring sleeves and the outer rotor are in a mutual contact engaged state; at least two sealed accommodation cavities are formed between adjacent elements of the inner rotor, the N layers of double-faced toothed ring sleeves and the outer rotor; and rotating axes of the inner rotor, the N layers of double-faced toothed ring sleeves and the outer rotor are positioned in the same plane, and are not overlapped. The double-faced toothed ring sleeves are additionally arranged between the inner rotor and the outer rotor, so that a volume between the rotor can be multiplied under the condition of no increase of widths of the rotors; and by the elastic compensation function of the double-faced toothed ring sleeves, a requirement on the machining accuracy of the inner and outer rotors of the device can also be lowered, so that machining difficulty and maintenance cost are lowered.

Description

【Technical field】 [0001] The present invention relates to a hydraulic pump or hydraulic motor device for industrial equipment or machinery, in particular to an internal gear pump or gear motor device. 【Background technique】 [0002] A hydraulic pump is an energy conversion device in a hydraulic transmission system. It converts the mechanical energy transmitted by power machinery (such as electric motors, internal combustion engines, etc.) It is the power source of the hydraulic system. [0003] A hydraulic motor traditionally refers to an energy conversion device that outputs rotational motion and converts the hydraulic energy provided by the hydraulic pump into mechanical energy. From the point of view of energy conversion, hydraulic pumps and hydraulic motors are reversible hydraulic components. Inputting working fluid to any hydraulic pump can make it a hydraulic motor; on the contrary, when the main shaft of the hydraulic motor is driven by the external When the torqu...

AI Technical Summary

Problems solved by technology

Therefore, the machining accuracy requirements for cycloidal gears are high, and small machining errors may lead to assembly failure or uneven load

[0007] The existing internal meshing gear pump relies on the contact accuracy between the inner and outer rotor tooth surfaces to ensure the sealing of each cavity. Due to the sliding friction between the inner and outer rotor tooth surfaces, under normal circumstances, when the inner and outer rotor tooth surfaces are worn, it will Increase the internal leakage of this type of device, which will cause the device to fail and be scrapped. In order to prolong the service life of the pump, it is usually solved by improving the precision of the parts and the surface hardness of the inner and outer rotor materials, so that its manufacturing difficulty and manufacturing cost will be greatly increased.

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