CN106090589A - A kind of rotor-type oil pump - Google Patents

Abstract

The invention provides a kind of rotor-type oil pump, including the pump housing, pump cover, travelling gear, armature spindle and the internal rotor being arranged on armature spindle and outer rotor, described internal rotor includes the first internal rotor and the second internal rotor that the gear teeth are staggered mutually, and described outer rotor includes the first outer rotor and the second outer rotor that internal tooth is staggered mutually；Described first internal rotor and the first outer rotor match, and described second internal rotor and the second outer rotor match.This structure can make the first internal rotor and the second internal rotor, and the first outer rotor and the second outer rotor the most do not carry out synchronous rotary, thus just can reduce produced pressure pulse wave when rotor rotates every time, can be reduced to the half of original pressure pulse wave time most.

Description

A rotary oil pump

technical field

The invention relates to a component of an engine lubricating system, in particular to a rotor type oil pump.

Background technique

The rotor oil pump consists of a pump body, a rotor shaft, an inner rotor, an outer rotor and a pump cover. The inner rotor is fixed on the rotor shaft and is directly or indirectly driven by the crankshaft gear. The inner rotor and the outer rotor are arranged eccentrically, and the inner rotor drives the outer rotor to rotate in the same direction. The tooth profiles of each tooth of the inner and outer rotors can always maintain a point contact state with each other, so that several working chambers are formed between the inner and outer rotors. When a certain working chamber turns from the oil suction chamber, the volume increases and a vacuum is generated, and the oil is sucked into the working chamber from the oil inlet hole. As the inner and outer rotors continue to rotate, the working chamber turns to the position where the oil pressure chamber communicates. , the volume becomes smaller, the oil pressure rises, and the oil is pressed into the lubricating oil channel from the oil outlet hole through the pressure oil chamber.

Since the existing rotor pumps generally have N working chambers, each time the rotor rotates, N pressure pulse waves will be generated. This continuous generation of pressure pulse waves is likely to cause the following problems: 1) It is easy to cause damage to subsequent parts, Such as impacting the subsequent oil filter; 2) resulting in poor lubrication of subsequent parts that need to be lubricated, unable to form effective and balanced lubrication, resulting in abnormal wear; 3) easily leading to abnormal opening of the regulating valve, causing the main oil passage to lack oil for lubrication.

Contents of the invention

The technical problem to be solved by the present invention is to provide a rotor type oil pump that can significantly reduce the pressure pulse at the outlet of the oil pump and reduce the amplitude of pressure fluctuations.

In order to solve the above technical problems, the present invention adopts the following technical solutions: a rotor type oil pump, including a pump body, a pump cover, a transmission gear, a rotor shaft, and an inner rotor and an outer rotor installed on the rotor shaft, the inner rotor It includes a first inner rotor and a second inner rotor whose gear teeth are staggered from each other, and the outer rotor includes a first outer rotor and a second outer rotor whose inner teeth are staggered from each other; the first inner rotor cooperates with the first outer rotor, The second inner rotor cooperates with the second outer rotor.

In the above technical solution, since the inner rotor includes a first inner rotor and a second inner rotor whose teeth are staggered from each other, the outer rotor includes a first outer rotor and a second outer rotor whose teeth are staggered from each other, and the first inner rotor and the first outer rotor The rotors are matched, and the second inner rotor is matched with the second outer rotor, so that the first inner rotor and the second inner rotor, as well as the first outer rotor and the second outer rotor do not rotate synchronously, thereby reducing the The pressure pulse wave generated each time the rotor rotates can be reduced to half of the original pressure pulse wave at most.

A further technical solution of the present invention is: partition plates are installed between the first inner rotor and the second inner rotor, and between the first outer rotor and the second outer rotor. A partition is used in the middle to isolate the first inner rotor, the first outer rotor, and the second inner rotor and the second outer rotor from interfering during operation.

In one embodiment, an interference fit is used between the inner rotor and the rotor shaft.

In one embodiment, the inner rotor is mounted on the rotor shaft by a keyed connection.

In one embodiment, the first inner rotor and the second inner rotor both have four teeth, and the first outer rotor and the second outer rotor both have five teeth.

Description of drawings

Fig. 1 is the exploded schematic diagram of the overall structure of the embodiment of the present invention;

The reference signs are:

1——Pump body 2——Pump cover 3——Transmission gear

4——rotor shaft 5——first inner rotor 6——second inner rotor

7——First outer rotor 8——Second outer rotor 9——Separator.

detailed description

In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

In the description of the present invention, it should be understood that the terms "first" and "second" are used for description purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined. In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be two The internal communication of each element may be directly connected or indirectly connected through an intermediary, and those skilled in the art can understand the specific meaning of the terms according to specific situations.

As shown in Figure 1, the preferred embodiment of the present invention is: a rotor type oil pump, including a pump body 1, a pump cover 2, a transmission gear 3, a rotor shaft 4, and an inner rotor and an outer rotor mounted on the rotor shaft , the inner rotor is installed on the rotor shaft through interference fit, the outer rotor is sleeved outside the inner rotor and is eccentrically arranged relative to the inner rotor, and the inner rotor includes a first inner rotor 5 and a second inner rotor 6 whose teeth are staggered from each other , the outer rotor includes a first outer rotor 7 and a second outer rotor 8 with internal teeth staggered from each other; the first inner rotor 5 is matched with the first outer rotor 7, and the second inner rotor 6 is matched with the second outer rotor The rotors 8 are matched; a partition 9 is installed between the first inner rotor 5 and the second inner rotor 6, and between the first outer rotor 7 and the second outer rotor 8; the first inner rotor 5 and the second inner rotor 6 has four teeth, and the first outer rotor 7 and the second outer rotor 8 have five teeth.

Since the inner rotor includes a first inner rotor 5 and a second inner rotor 6 whose teeth are staggered from each other, the outer rotor includes a first outer rotor 7 and a second outer rotor 8 whose teeth are staggered from each other. The rotor 7 is matched, and the second inner rotor 6 is matched with the second outer rotor 8, so that the first inner rotor 5 and the second inner rotor 6, as well as the first outer rotor 7 and the second outer rotor 8 are not Synchronous rotation, so that the pressure pulse wave generated by the rotor every time it rotates can be reduced, at most it can be reduced to half of the original pressure pulse wave; a partition is used in the middle to prevent the first inner rotor 5 and the first outer rotor 7 from It interferes with the second inner rotor 6 and the second outer rotor 8 during operation.

The above-mentioned embodiments are preferred implementation solutions of the present invention. In addition, the present invention can also be realized in other ways, and any obvious replacements are within the scope of protection of the present invention without departing from the concept of the technical solution.

In order to make it easier for those skilled in the art to understand the improvement of the present invention compared to the prior art, some drawings and descriptions of the present invention have been simplified, and for the sake of clarity, some other elements have been omitted in this application document, Those of ordinary skill in the art should realize that these omitted elements may also constitute the content of the present invention.

Claims (5)

1. a rotor-type oil pump, including the pump housing (1), pump cover (2), travelling gear (3), armature spindle (4) and be arranged on turn Internal rotor on sub-axle (4) and outer rotor, it is characterised in that: described internal rotor includes the first internal rotor that the gear teeth are staggered mutually (5) and the second internal rotor (6), described outer rotor includes the first outer rotor (7) and the second outer rotor (8) that internal tooth is staggered mutually； Described first internal rotor (5) is matched with the first outer rotor (7), and described second internal rotor (6) matches with the second outer rotor (8) Close.

Rotor-type oil pump the most according to claim 1, it is characterised in that: the first internal rotor (5) and the second internal rotor (6) Between, between the first outer rotor (7) and the second outer rotor (8) equipped with dividing plate (9).

Rotor-type oil pump the most according to claim 1 and 2, it is characterised in that: between described internal rotor and armature spindle be Interference fit.

Rotor-type oil pump the most according to claim 1 and 2, it is characterised in that: described internal rotor is by bonded installation On armature spindle.

Rotor-type oil pump the most according to claim 1 and 2, it is characterised in that: in described first internal rotor (5) and second The number of teeth of rotor (6) is four, and the number of teeth of the first outer rotor (7) and the second outer rotor (8) is five.