CN219220547U - Oil return pump and engine - Google Patents

Oil return pump and engine Download PDF

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Publication number
CN219220547U
CN219220547U CN202223547500.6U CN202223547500U CN219220547U CN 219220547 U CN219220547 U CN 219220547U CN 202223547500 U CN202223547500 U CN 202223547500U CN 219220547 U CN219220547 U CN 219220547U
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gear
oil
port
pump
inner cavity
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CN202223547500.6U
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Chinese (zh)
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陈聪明
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Xiamen Linbach Aero Engine Co ltd
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Xiamen Linbach Aero Engine Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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Abstract

The utility model provides a scavenge pump and an engine, the scavenge pump comprises a scavenge pump body, the scavenge pump body comprises: the device comprises a shell, a first gear, a second gear and a third gear, wherein the inner cavity of the shell is divided into three first inner cavities, a second inner cavity and a third inner cavity which are communicated with each other, the first gear, the second gear and the third gear are respectively and rotatably arranged in the first inner cavity, the second inner cavity and the third inner cavity, and the external teeth of the first gear, the second gear and the third gear are respectively tangent to the inner cavity wall surfaces of the first inner cavity, the second inner cavity and the third inner cavity; the first port and the second port of the shell are respectively positioned at the left side and the right side between the first gear and the second gear, and the third port and the fourth port of the shell are respectively positioned at the left side and the right side between the second gear and the third gear. The engine oil with at least one oil return passage can be led to the engine oil pot, so that no empty pumping is caused.

Description

Oil return pump and engine
Technical Field
The utility model relates to the technical field of engines, in particular to an oil return pump and an engine.
Background
The four-stroke aeroengine with the piston dry oil pan is characterized in that an external oil can is needed for meeting the flying working conditions of large-angle pitching and tilting of an aircraft, an oil return oil pump is arranged, meanwhile, the crankcase oil pan is inclined, oil return passages of engine oil are required to be provided with two passages, and an oil return collection switching valve is arranged for switching the corresponding oil return passages according to the condition that the engine is tilted downwards to ensure that the oil return oil pump smoothly pumps engine oil from the oil pan, and the condition that the engine oil pump cannot pump oil back to the oil can not pump oil if the engine oil pump pumps oil empty is required, if the engine oil pump pumps oil empty because no engine oil is sucked, the engine lacks lubrication, and parts are damaged by dry grinding is caused. Such a system is relatively complex in construction and prone to failure, which would affect the normal operation of the engine lubrication system and thus the engine.
Disclosure of Invention
The utility model aims to provide an oil return pump and an engine, which have simple structures and can not cause the oil pump to empty.
In order to solve the technical problems, the utility model adopts the following technical scheme.
According to one aspect of the present utility model there is provided a scavenge pump comprising a scavenge pump body including:
the shell is provided with an inner cavity, and a first port, a second port, a third port and a fourth port which are communicated with the inner cavity are formed in the outer wall of the shell;
a first gear as a driven wheel;
a second gear which serves as a driving wheel and is meshed with the first gear;
a third gear as a driven wheel and meshed with the second gear;
the inner cavity of the shell is divided into three mutually communicated first inner cavities, second inner cavities and third inner cavities, the first gear, the second gear and the third gear are respectively and rotatably arranged in the first inner cavities, the second inner cavities and the third inner cavities, and the external teeth of the first gear, the second gear and the third gear are respectively tangent to the inner cavity wall surfaces of the first inner cavities, the second inner cavities and the third inner cavities;
the first port and the second port of the shell are respectively positioned at the left side and the right side between the first gear and the second gear, and the third port and the fourth port of the shell are respectively positioned at the left side and the right side between the second gear and the third gear.
In some embodiments of the present application, the scavenge pump further includes: the first port and the fourth port of the shell are communicated with the oil outlet of the oil pump through a pipeline.
According to some embodiments of the present application, the oil return pump further comprises a first oil inlet and a second oil inlet, the first oil inlet is communicated with the third port, and the second oil inlet is communicated with the second port.
According to one aspect of the present utility model, there is provided an engine having an oil pan and a scavenge pump, the oil pan and scavenge pump being in communication, the scavenge pump including a scavenge pump body including: the shell is provided with an inner cavity, and a first port, a second port, a third port and a fourth port which are communicated with the inner cavity are formed in the outer wall of the shell; a first gear as a driven wheel; a second gear which serves as a driving wheel and is meshed with the first gear; a third gear as a driven wheel and meshed with the second gear; the inner cavity of the shell is divided into three mutually communicated first inner cavities, second inner cavities and third inner cavities, the first gear, the second gear and the third gear are respectively and rotatably arranged in the first inner cavities, the second inner cavities and the third inner cavities, and the external teeth of the first gear, the second gear and the third gear are respectively tangent to the inner cavity wall surfaces of the first inner cavities, the second inner cavities and the third inner cavities; the first port and the second port of the shell are respectively positioned at the left side and the right side between the first gear and the second gear, and the third port and the fourth port of the shell are respectively positioned at the left side and the right side between the second gear and the third gear. The bottom of the oil pan is provided with a first oil pump oil inlet and a second oil pump oil inlet, the first oil pump oil inlet is communicated with a third port of the shell of the oil return pump body through a pipeline, and the second oil pump oil inlet is communicated with a second port of the shell of the oil return pump body through a pipeline.
As can be seen from the technical scheme, the embodiment of the utility model has at least the following advantages and positive effects:
the oil return pump provided by the embodiment of the utility model can be used for returning the engine oil of two engine oil return passages, and the engine oil is led to the engine oil pot from the oil outlet of the same oil pump, so that a parallel structure of an oil way is formed, and the engine oil with at least one oil return passage can be led to the engine oil pot, so that no empty pumping is caused.
The engine provided by the embodiment of the utility model is provided with the oil pan and the oil return pump, so that when the engine tilts in a pitching mode, no matter which oil inlet of the oil pan is communicated with the oil inlet of the oil pump, the oil inlet of the oil pump communicated with the other oil return passage always can return oil when the oil level of the engine is exposed and oil cannot return.
Drawings
FIG. 1 is a schematic cross-sectional view of a scavenge pump;
in the figure:
1. a housing; 11. a first port; 12. a second port; 13. a third port; 14. a fourth port; 2. a first gear; 3. a second gear; 4. a third gear; 5. an oil outlet of the oil pump; 6. a first oil inlet; 7. and a second oil inlet.
Detailed Description
While this utility model is susceptible of embodiment in different forms, there is shown in the drawings and will herein be described in detail, specific embodiments thereof with the understanding that the present disclosure is to be considered as an exemplification of the principles of the utility model and is not intended to limit the utility model to that as illustrated.
Thus, rather than implying that each embodiment of the present utility model must have the characteristics described, one of the characteristics indicated in this specification will be used to describe one embodiment of the present utility model. Furthermore, it should be noted that the present specification describes a number of features. Although certain features may be combined together to illustrate a possible system design, such features may be used in other combinations not explicitly described. Thus, unless otherwise indicated, the illustrated combinations are not intended to be limiting.
In the embodiments shown in the drawings, indications of orientation (such as up, down, left, right, front and rear) are used to explain the structure and movement of the various elements of the utility model are not absolute but relative. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the description of the position of these elements changes, the indication of these directions changes accordingly.
Preferred embodiments of the present utility model will be further elaborated below in conjunction with the drawings of the present specification.
FIG. 1 is a schematic cross-sectional view of a scavenge pump.
Referring to fig. 1, it is shown that:
according to one aspect of the present utility model there is provided a scavenge pump comprising a scavenge pump body including: a housing 1, a first gear 2, a second gear 3 and a third gear 4.
Specifically, the casing 1 has an inner cavity, and a first port 11 (as a first outlet), a second port 12 (as a first inlet), a third port 13 (as a second inlet) and a fourth port 14 (as a second outlet) which are communicated with the inner cavity are formed in the outer wall of the casing 1; a first gear 2 as a driven wheel; a second gear 3 serving as a drive wheel and meshed with the first gear 2; a third gear 4 as a driven wheel and meshed with the second gear 3; the inner cavity of the shell 1 is divided into three mutually communicated first inner cavities, second inner cavities and third inner cavities, the first gear 2, the second gear 3 and the third gear 4 are respectively and rotatably arranged in the first inner cavities, the second inner cavities and the third inner cavities, and the external teeth of the first gear 2, the second gear 3 and the third gear 4 are respectively tangent to the inner cavity wall surfaces of the first inner cavities, the second inner cavities and the third inner cavities; the first port 11 and the second port 12 of the housing 1 are respectively located at the left and right sides between the first gear 2 and the second gear 3, and the third port 13 and the fourth port 14 of the housing 1 are respectively located at the left and right sides between the second gear 3 and the third gear 4. In this arrangement, since the external teeth of the first gear 2, the second gear 3 and the third gear 4 are tangential to the inner cavity walls of the first inner cavity, the second inner cavity and the third inner cavity, respectively, oil flowing between the first gear 2 and the second gear 3 and oil flowing between the second gear 3 and the third gear 4 can only be transferred through the gaps between the external teeth of the gears, without the condition of empty pumping of the oil; it should be noted that, when the second gear 3 is used as the driving wheel and is located between the first gear 2 and the second gear 3, and no engine oil passes between the first gear 2 and the second gear 3, as the engine oil passes between the second gear 3 and the third gear 4, the second gear 3 can be stuck with engine oil to lubricate the first gear 2, so that the problem that the first gear 2 is idle in lubrication and is blocked by abrasion between the second gear 3 is avoided, and similarly, when the inorganic oil passes between the second gear 3 and the third gear 4, as the engine oil passes between the second gear 3 and the first gear 2, the second gear 3 can be stuck with engine oil to lubricate the third gear 4, so that the problem that the third gear 4 is idle in lubrication and is blocked by abrasion between the third gear 3 is avoided.
Specifically, in one embodiment of the present application, the scavenging pump further includes: the oil pump outlet 5, the first port 11 and the fourth port 14 of the shell 1 are communicated with the oil pump outlet 5 through a pipeline. In this arrangement, the oil return pump of the present utility model has three gears (i.e., the first gear 2, the second gear 3, and the third gear 4) as shown in fig. 1, and when in use, the oil return pump can be used for oil return of two oil return passages (i.e., the oil connected to the two oil return passages through the second port 12 and the third port 13 of the housing 1, specifically, the oil of one oil return passage can enter from the second port 12 of the housing 1, then flow out from the first port 11 of the housing 1, then flow to the oil pump outlet 5, and the oil of the other oil return passage can enter from the third port 13 of the housing 1, then flow out from the fourth port 14 of the housing 1, and then flow to the oil pump outlet 5), that is, the oil from the same oil pump outlet 5 leads to the oil pot, thus forming a parallel structure of an oil path, and the oil of at least one oil return passage can be led to the oil pot, so that no empty pumping is caused.
Specifically, in one embodiment of the present application, the oil return pump further includes a first oil inlet 6 and a second oil inlet 7, the first oil inlet 6 is communicated with a third port 13, and the second oil inlet 7 is communicated with a second port 12; the first oil inlet 6 and the second oil inlet 7 are used for circulating engine oil and are convenient for externally connecting an oil way.
According to one aspect of the present utility model, there is provided an engine having an oil pan (not shown) and a scavenge pump, the oil pan and the scavenge pump being in communication, the scavenge pump being as described above, the bottom of the oil pan having a first oil pump inlet and a second oil pump inlet, the first oil pump inlet being in communication via a conduit with a third port 13 of the housing 1 of the scavenge pump body, the second oil pump inlet being in communication via a conduit with a second port 12 of the housing 1 of the scavenge pump body.
When the engine tilts in a pitching mode, no matter which oil inlet of the oil pan is communicated with the oil inlet of the oil pump, the oil inlet of the oil pump communicated with the other oil return passage always can return oil (namely, due to the action of gravity, the engine always flows to one of the first oil inlet and the second oil inlet when tilting in a pitching mode), so that normal oil return and delivery of the engine oil to the engine oil can be ensured, when the engine does not tilt in a pitching mode, the oil liquid level cannot be exposed due to the fact that the two oil inlets (namely, the first oil inlet and the second oil inlet) cannot return oil, namely, when oil can return, the oil return pump with three gears (namely, the first gear 2, the second gear 3 and the third gear 4) can form a double pump to simultaneously suck and return oil of the two oil return passages.
Based on the technical scheme, the embodiment of the utility model has at least the following advantages and positive effects:
the oil return pump provided by the embodiment of the utility model can be used for returning the engine oil of two engine oil return passages, and the engine oil is led to the engine oil pot from the same oil pump outlet 5, so that a parallel structure of an oil way is formed, and the engine oil with at least one oil return passage can be led to the engine oil pot, so that no empty pumping is caused.
The engine provided by the embodiment of the utility model is provided with the oil pan and the oil return pump, so that when the engine tilts in a pitching mode, no matter which oil inlet of the oil pan is communicated with the oil inlet of the oil pump, the oil inlet of the oil pump communicated with the other oil return passage always can return oil when the oil level of the engine is exposed and oil cannot return.
While the utility model has been described with reference to several exemplary embodiments, it is to be understood that the terminology used is intended to be in the nature of words of description and of limitation. As the present utility model may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (4)

1. An scavenge pump comprising a scavenge pump body, characterized in that the scavenge pump body comprises:
the shell is provided with an inner cavity, and a first port, a second port, a third port and a fourth port which are communicated with the inner cavity are formed in the outer wall of the shell;
a first gear as a driven wheel;
a second gear which serves as a driving wheel and is meshed with the first gear;
a third gear as a driven wheel and meshed with the second gear;
the inner cavity of the shell is divided into three mutually communicated first inner cavities, second inner cavities and third inner cavities, the first gear, the second gear and the third gear are respectively and rotatably arranged in the first inner cavities, the second inner cavities and the third inner cavities, and the external teeth of the first gear, the second gear and the third gear are respectively tangent to the inner cavity wall surfaces of the first inner cavities, the second inner cavities and the third inner cavities;
the first port and the second port of the shell are respectively positioned at the left side and the right side between the first gear and the second gear, and the third port and the fourth port of the shell are respectively positioned at the left side and the right side between the second gear and the third gear.
2. The scavenge pump of claim 1, further comprising:
the first port and the fourth port of the shell are communicated with the oil outlet of the oil pump through a pipeline.
3. The scavenge pump of claim 1, characterized in that:
the novel hydraulic oil pump further comprises a first oil inlet and a second oil inlet, wherein the first oil inlet is communicated with the third port, and the second oil inlet is communicated with the second port.
4. An engine having an oil pan and a scavenge pump, the oil pan and scavenge pump in communication, characterized in that:
the oil return pump is the oil return pump of claim 1, the bottom of the oil pan is provided with a first oil pump oil inlet and a second oil pump oil inlet, the first oil pump oil inlet is communicated with a third port of the shell of the oil return pump body through a pipeline, and the second oil pump oil inlet is communicated with a second port of the shell of the oil return pump body through a pipeline.
CN202223547500.6U 2022-12-28 2022-12-28 Oil return pump and engine Active CN219220547U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223547500.6U CN219220547U (en) 2022-12-28 2022-12-28 Oil return pump and engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223547500.6U CN219220547U (en) 2022-12-28 2022-12-28 Oil return pump and engine

Publications (1)

Publication Number Publication Date
CN219220547U true CN219220547U (en) 2023-06-20

Family

ID=86739135

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202223547500.6U Active CN219220547U (en) 2022-12-28 2022-12-28 Oil return pump and engine

Country Status (1)

Country Link
CN (1) CN219220547U (en)

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