CN107355666B

CN107355666B - Double-rotor oil pump

Info

Publication number: CN107355666B
Application number: CN201710809026.4A
Authority: CN
Inventors: 许仲秋; 邓鹏辉
Original assignee: Hunan Oil Pump Co Ltd
Current assignee: Hunan Oil Pump Co Ltd
Priority date: 2017-09-09
Filing date: 2017-09-09
Publication date: 2022-08-09
Anticipated expiration: 2037-09-09
Also published as: CN107355666A

Abstract

The invention relates to the technical field of electronic element processing equipment, in particular to a dual-rotor oil pump which can ensure that the engine still can ensure good lubrication when the position of the engine inclines for a certain angle, and comprises a pump body and a pump cover, two independent rotor cavities are arranged in the pump body, a main pump rotor and an auxiliary pump rotor are respectively arranged in the rotor cavities, the pump cover is provided with a main pump oil suction port, a main pump oil discharge port, an auxiliary pump oil suction port and an auxiliary pump oil discharge port, the main pump oil suction port is connected with the left oil pipe at the bottom of the oil pan, the main pump oil discharge port is communicated with the main oil duct of the engine, the oil suction port of the auxiliary pump is connected with an oil pipe at the right side of the bottom of the oil pan, the oil discharge port of the auxiliary pump is communicated with the oil pan at one side of the oil suction port of the main pump, and driven gears are fixedly mounted at the shaft ends of the main pump rotor and the auxiliary pump rotor and driven by a crankshaft of the engine.

Description

Double-rotor oil pump

Technical Field

The invention relates to the technical field of oil pumps, in particular to a dual-rotor oil pump.

Background

The oil pump plays an essential role as a lubricant supply unit of an engine in order to continue reliable operation of the engine. In practical applications, the oil level of the oil pan of the engine is abnormal due to the inclination of the whole mechanical equipment (for example, the oil level of the oil pan of the engine applied to a ship is abnormal due to the inclination of a ship body), in such a case, the oil pump of the engine cannot normally suck lubricating oil from the oil pan to cause dry friction of the engine, so that the engine is protectively stopped if the oil pump is light, and the engine is subjected to accidents such as cylinder scuffing and tile burning if the oil pump is heavy.

Disclosure of Invention

The invention aims to provide a dual-rotor oil pump which can ensure that oil can still be pumped from an oil sump to an engine main oil gallery when an engine inclines, and greatly enhances the lubricating capability of the existing engine in an inclined state.

In order to realize the purpose, the invention adopts the following technical scheme: the double-rotor oil pump comprises a pump body and a pump cover, wherein a main pump rotor cavity and an auxiliary pump rotor cavity which are mutually independent are arranged in the pump body, a main pump rotor is arranged in the main pump rotor cavity, an auxiliary pump rotor is arranged in the auxiliary pump rotor cavity, a main pump oil suction port, a main pump oil discharge port, an auxiliary pump oil suction port and an auxiliary pump oil discharge port are arranged on the pump cover, the main pump oil suction port is connected with an oil pipe on the left side of the bottom of the oil pan, the main pump oil discharge port is communicated with a main oil duct of an engine, the auxiliary pump oil suction port is connected with an oil pipe on the right side of the bottom of the oil pan, the auxiliary pump oil discharge port is communicated with the oil pan on one side of the main pump oil suction port, driven gears are fixedly mounted at the shaft ends of the main pump rotor and the shaft ends of the auxiliary pump rotor, and the driven gears are driven by an engine crankshaft.

Furthermore, an oil drainage groove for communicating an oil outlet of the main pump with an oil inlet of the auxiliary pump is arranged on the pump body.

Furthermore, a lubricating oil groove communicated with the oil pan and the auxiliary pump rotating shaft hole is further formed in the pump cover.

Further, a pressure release valve is further arranged at the oil outlet of the main pump on the pump body, the pressure release valve comprises a valve body, a plunger and a plunger spring, the plunger and the plunger spring are arranged in the valve body, an oil drainage port is formed in the middle of the valve body, and the oil drainage port is communicated with the oil inlet of the main pump.

Furthermore, the valve body is also provided with an exhaust hole which is communicated with a main pump oil suction port.

The invention has the beneficial effects that: the double-rotor oil pump solves the problem that the oil pump in the prior art can not pump oil from an oil sump when the engine is greatly inclined, greatly improves the application field and the reliability of the engine, simultaneously, the double-rotor oil pump does not cause large power consumption, a main pump rotor and an auxiliary pump rotor can completely absorb oil and lubricate by themselves in a normal use state, and on the other hand, the double-rotor oil pump can also enhance the balance performance of the engine and play a role of balancing a shaft for the engine with an odd number of cylinders.

Drawings

Fig. 1 is an overall schematic diagram of an embodiment of the present invention.

FIG. 2 is a partial schematic view of an embodiment of the present invention.

FIG. 3 is a partial schematic view of an embodiment of the present invention.

Fig. 4 is a schematic diagram of a pressure relief valve according to an embodiment of the invention.

In the figure:

1-pump body 2-pump cover 3-main pump rotor

3 a-main pump oil suction port 3 b-main pump oil discharge port 4-auxiliary pump rotor

4 a-auxiliary pump oil suction port 4 b-auxiliary pump oil discharge port 5-oil hole

6-oil drainage groove 7-pressure release valve 7 a-valve body

7 b-plunger 7 c-plunger spring 7 d-oil drain port

8-air vent.

Detailed Description

In the description of the present invention, it is to be understood that the terms "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In addition, the terms "mounted," "connected," and "connected" should be interpreted broadly, such as mechanically or electrically connected, or interconnected between two elements, directly or indirectly through intervening media, as one of ordinary skill in the art would understand the meaning of the terms as appropriate.

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

As shown in fig. 1, a dual-rotor oil pump, which can ensure good lubrication of an engine when the position of the engine is greatly inclined, comprises a pump body 1 and a pump cover 2, a main pump rotor cavity and an auxiliary pump rotor cavity which are mutually independent are arranged in the pump body 1, a main pump rotor 3 is arranged in the main pump rotor cavity, an auxiliary pump rotor 4 is arranged in the auxiliary pump rotor cavity, a main pump oil suction port 3a, a main pump oil discharge port 3b, an auxiliary pump oil suction port 4a and an auxiliary pump oil discharge port 4b are arranged on the pump cover 2, the main pump oil suction port 3a is connected with a left oil pipe at the bottom of an oil pan of the engine, the main pump oil discharge port 3b is communicated with a main oil gallery of the engine, the auxiliary pump oil suction port 4a is connected with a right oil pipe at the bottom of an engine oil pan, the auxiliary pump oil discharge port 4b is communicated with the oil pan at one side of the main pump, and the main pump rotor 3 and the auxiliary pump rotor 4 are driven by a main gear on an engine crankshaft.

In the practical application of the engine, how to ensure that the engine can still obtain good lubrication under severe conditions is an index which is very important for evaluating the performance of the engine, and certainly is an important index which directly influences the reliability of the engine, and particularly, it needs to be emphasized that various attempts are made in the prior art for lubrication under the condition of an inclined engine, but the idea of adopting a double-pump design is not proposed, mainly because the double-pump design inevitably brings certain power consumption, in order to ensure that two independent pump bodies obtain good lubrication, a complex lubrication pipeline is often needed to be arranged, the power consumption and the pipeline arrangement are very avoided for the engine, and the inventor considers and adopts a double-rotor design, and particularly emphasizes that two rotors are horizontally arranged on the side surface of the engine, the rotor shafts of the main pump rotor and the auxiliary pump rotor are parallel to the crankshaft space of the engine, the rotating main pump rotor 3 and the auxiliary pump rotor 4 can overcome unbalanced shaking in the operation of the engine (the structural design is quite similar to the design of the balance shafts of some engines), and the great attempt of the inventor is undoubtedly to break through the bottleneck of the prior art personnel and make a great breakthrough.

Further, an oil drainage groove 6 for communicating the main pump oil outlet 3b and the auxiliary pump oil inlet 4a is arranged on the pump body 1.

In a normal operating state, that is, the engine is not inclined, at this time, a main pump of the oil pump may have a state in which the drain pressure is too high, and if the drain pressure is too high, a large rotation resistance may be generated on a crankshaft of the engine, and on the other hand, the too high drain pressure may be finally converted into internal energy of lubricating oil, so that the drain temperature may also be increased, which may affect the viscosity of the lubricating oil of the engine, and therefore, it is necessary to provide a pressure relief channel for a drain port of the main pump.

Furthermore, the pump cover 2 is also provided with an oil hole 5 for communicating the oil pan with a rotating shaft hole of the auxiliary pump rotor 4.

Since the sub-pump is not used as a main oil pumping means in a normal state, the rotor shaft of the sub-pump rotor 4 does not actually bear a large load, and therefore, the oil in the oil pan can be directly used for lubricating the sub-pump rotor, and the inventors opened the oil hole 5 communicating the oil pan with the shaft hole of the rotation shaft of the sub-pump rotor 4 in the pump cover 2.

Further, the main pump oil drain port 3b department still is equipped with a relief valve 7 on the pump body, relief valve 7 includes valve body 7a and locates plunger 7b and plunger spring 7c in the valve body 7a, valve body 7a middle part is equipped with draining port 7d, draining port 7d intercommunication the main pump oil suction port 3 a. In order to prevent the above-mentioned problem caused by the blockage of the drain oil groove 6, namely, the situation that the drain pressure of the main pump of the oil pump is too high, the inventor further provides a pressure relief valve on the pump body.

Further, the valve body 7a is also provided with an exhaust hole 8, and the exhaust hole 8 is communicated with the main pump oil suction port 3 a. In order to ensure the normal operation of the pressure relief valve, the pressure generated by the normal movement of the plunger 7b in the pressure relief valve 7 must also be released, so the inventor provided a vent hole 8 in the valve body 7 a.

The above embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.

Some of the drawings and descriptions of the present invention have been simplified to facilitate the understanding of the improvements over the prior art by those skilled in the art, and some other elements have been omitted from this document for the sake of clarity, and it should be appreciated by those skilled in the art that such omitted elements may also constitute the subject matter of the present invention.

Claims

1. The utility model provides a birotor oil pump, can guarantee still can guarantee the good lubrication of engine when the great slope takes place for the engine position, includes pump body (1), pump cover (2), its characterized in that: a main pump rotor cavity and an auxiliary pump rotor cavity which are mutually independent are arranged in the pump body (1), a main pump rotor (3) is arranged in the main pump rotor cavity, an auxiliary pump rotor (4) is arranged in the auxiliary pump rotor cavity, a main pump oil suction port (3 a), a main pump oil discharge port (3b), an auxiliary pump oil suction port (4 a) and an auxiliary pump oil discharge port (4 b) are arranged on the pump cover (2), the main pump oil suction port (3 a) is connected with a left oil pipe at the bottom of an oil pan, the main pump oil discharge port (3b) is communicated with a main oil duct of an engine, the auxiliary pump oil suction port (4 a) is connected with a right oil pipe at the bottom of the oil pan of the engine, and the auxiliary pump oil discharge port (4 b) is communicated with the oil pan at one side of the main pump; an oil drainage groove (6) communicated with a main pump oil outlet (3b) and an auxiliary pump oil suction port (4 a) is formed in the pump body (1); the pump cover (2) is also provided with an oil hole (5) for communicating the oil pan with a rotating shaft hole of the auxiliary pump rotor (4); the two rotors are horizontally arranged on the side of the engine, the rotor shafts of the main pump rotor (3) and the auxiliary pump rotor (4) are spatially parallel to the crankshaft of the engine, and the rotor shafts of the main pump rotor (3) and the auxiliary pump rotor (4) are driven by a main gear on the crankshaft of the engine.

2. The dual rotor oil pump of claim 1, wherein: the oil pump is characterized in that a pressure release valve (7) is further arranged at the position of a main pump oil outlet (3b) on the pump body (1), the pressure release valve (7) comprises a valve body (7 a) and a plunger (7 b) and a plunger spring (7 c) which are arranged in the valve body (7 a), an oil drainage port (7 d) is arranged in the middle of the valve body (7 a), and the oil drainage port (7 d) is communicated with a main pump oil suction port (3 a).

3. The dual rotor oil pump of claim 2, wherein: the valve body (7 a) is further provided with an exhaust hole (8), and the exhaust hole (8) is communicated with a main pump oil suction port (3 a).