CN215633206U - A dual oil pump lubrication system - Google Patents
A dual oil pump lubrication system Download PDFInfo
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- CN215633206U CN215633206U CN202121971284.0U CN202121971284U CN215633206U CN 215633206 U CN215633206 U CN 215633206U CN 202121971284 U CN202121971284 U CN 202121971284U CN 215633206 U CN215633206 U CN 215633206U
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Abstract
The utility model discloses a double-engine oil pump lubricating system which comprises an engine oil tank connected to an engine and an engine oil pump in power connection with the engine, wherein the engine oil pump is connected with the engine oil tank through an oil inlet pipeline, the engine oil pump is connected with an oil outlet pipeline, the oil outlet pipeline is connected with a first branch and a second branch, the engine is also in power connection with a booster oil pump through a clutch device, the oil inlet end of the booster oil pump is connected with the first branch, the oil outlet end of the booster oil pump is connected with an output oil way, the output oil way and the second branch are jointly connected with an oil supply pipeline capable of providing high-pressure engine oil for engine parts, a first valve is arranged on the second branch, and a second valve is arranged on the output oil way. The utility model can simultaneously ensure the normal pressure engine oil lubrication and the high pressure engine oil lubrication, and has the advantages of high efficiency, energy waste reduction and effective reduction of the power requirement of the engine.
Description
Technical Field
The utility model relates to the field of lubricating systems of engines, in particular to a double-engine oil pump lubricating system.
Background
In an engine, parts such as a fuel pump, a shock absorber and the like need lubricating oil with higher pressure at low rotating speed so as to meet the lubricating requirement. In the existing scheme, after the engine oil pumped by the engine oil pump passes through a filter and a cooler, one path of the engine oil directly leads to each part of an engine for conventional pressure lubrication, and the other path of the engine oil leads to a booster oil pump, and enters engine parts needing high-pressure engine oil lubrication, such as a fuel pump, a shock absorber and the like after being boosted by the booster oil pump. Because the booster oil pump passes through band pulley and driving belt and engine direct power connection, therefore the rotational speed of engine can direct influence booster oil pump's rotational speed, the improvement of original oil pump rotational speed can improve the machine oil pressure that the oil pump was pumped, the pressure boost effect of booster oil pump again, booster oil pump's rotational speed improvement can lead to its machine oil pressure grow that pumps, in order to prevent other problems that the too big oil pressure caused, generally install the pressure release pipeline on booster oil pump's output pipeline, when the oil pressure is too big, some machine oil can flow back through the pressure release pipeline. The lubricating system with the structure has the disadvantages that when the engine works in a high-rotating-speed state, the oil pump is in a high-rotating-speed state (provides high-pressure engine oil), the booster oil pump is also in a high-rotating-speed state (further boosts the engine oil), and part of the engine oil flows back through the pressure relief pipeline, so that energy waste is caused.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide a dual-engine oil pump lubricating system, which can meet the conventional-pressure engine oil lubrication of engine parts and the high-pressure engine oil lubrication of the engine parts, greatly reduce the back-unloading of a large amount of engine oil of an engine under the condition of high rotating speed, avoid the energy waste of the engine at the high rotating speed and reduce the power of the engine.
In order to solve the technical problem, the provided double-engine oil pump lubricating system comprises an oil tank connected to an engine and an oil pump in power connection with the engine, wherein the oil pump is connected with the oil tank through an oil inlet pipeline.
The first valve and the second valve are respectively one-way valves which can be conducted to the output end of the oil supply pipeline.
The clutch device is a clutch.
The oil inlet end and the oil outlet end of the booster oil pump are connected with oil drainage branches, the connecting parts of the oil drainage branches and the output oil way are closer to the oil outlet end than the second valve, and the oil drainage branches are provided with pressure relief valves.
The booster oil pump is in direct power connection with the engine through a clutch device; or the booster oil pump is directly connected with the oil pump through the clutch device.
The connecting part of the first branch and the oil outlet pipeline is closer to the oil pump than the connecting part of the second branch and the oil outlet pipeline.
And the second branch and the output oil way are connected with the oil supply pipeline through a three-way pipe joint.
After the structure is adopted, the clutch device, the first branch and the second branch are arranged, the clutch device is closed when the engine is in a low rotating speed state and a normal rotating speed state, the engine drives the booster oil pump to work, the first valve is closed, the second valve is opened, the engine oil is pumped out by the engine oil pump, the engine oil lubrication with the conventional pressure is provided for engine parts through the oil outlet pipeline, the pumped engine oil can also enter the first branch, and after the boosting action of the booster oil pump, the boosted engine oil provides the engine parts with the engine oil lubrication with the high pressure through the oil supply pipeline; when the engine is in a high-rotating-speed state, the clutch device is opened, the booster oil pump does not work, the first valve is opened, the second valve is closed, the engine oil is pumped out by the engine oil pump, and the engine oil pump can also run at a high rotating speed under the driving of the engine at the moment, so that the pressure of the engine oil pumped out by the engine oil pump can completely reach the high-pressure engine oil lubrication, and the high-pressure engine oil can provide the high-pressure engine oil lubrication for engine parts through the oil supply pipeline after passing through the second branch. It can be seen from the above description that, when the engine is in a high-speed state, the booster oil pump is not required to further boost the engine oil, thereby avoiding energy waste, and ensuring the power output of the engine to other power components, i.e. reducing the engine power (in a high-speed state, one load of the engine can be reduced, and the power drive of the engine to a plurality of power components is not required to be increased). The one-way valve can ensure that high-pressure fuel passes through the fuel supply pipeline, namely when the oil pressure on the second branch is smaller than that of the output oil way, the first valve is automatically closed, when the clutch device is disconnected and the booster oil pump does not work, the oil pressure on the second branch is naturally greater than that on the output oil way, and the second valve is automatically closed, so that complex control equipment does not need to be added, and the cost is reduced. The pressure relief branch and the pressure relief valve can effectively protect engine parts and avoid damage to the parts caused by overlarge oil pressure.
In conclusion, the engine oil lubricating device can simultaneously ensure the engine oil lubrication under the conventional pressure and the engine oil lubrication under the high pressure, and has the advantages of high efficiency, energy waste reduction and effective reduction of the requirement on the power of an engine.
Drawings
The utility model is further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a prior art lubrication system;
FIG. 2 is a schematic diagram of one embodiment of the present invention;
FIG. 3 is a schematic illustration of an operating condition of the embodiment of FIG. 2;
fig. 4 is a schematic view of another operating state of the embodiment of fig. 2.
Detailed Description
As shown in fig. 1, a part of the mechanism of the engine is illustrated in fig. 1, a specific structure of the engine is not described in detail herein, an oil pump 1 is connected to the engine in a power mode, the oil pump 1 is connected to a power output shaft (or a crankshaft, etc.) of the engine in a power mode through a belt and a pulley, similarly, a booster oil pump 2 is also connected to the engine in a power mode, an oil tank 3 is also connected to the engine in a power mode, the oil pump 1 pumps oil from the oil tank, one branch is in the same direction as an engine working part requiring conventional press oil lubrication, the other branch enters the booster oil pump 2, the oil is pressurized by the booster oil pump and then is output through a pipeline, and the engine working part requiring high-pressure press oil lubrication (such as a fuel pump, a shock absorber, etc.) is provided with the oil. In the low-speed or normal-speed state of the engine, the above-mentioned lubrication work does not present problems, but when the engine is in the high-speed state, the oil pump and the booster oil pump can simultaneously increase the speed, that is, the oil pressure pumped by the oil pump can be increased, the oil pressure passing through the booster oil pump can be further increased, the oil with too high pressure can flow back to the oil tank through the oil drainage pipeline, so as to prevent the problem of damage of engine parts caused by too high oil pressure.
As shown in fig. 2, the present invention provides a specific embodiment of a dual-engine oil pump lubrication system, which includes an engine oil tank 3 connected to an engine and an engine oil pump 1 dynamically connected to the engine, wherein the engine oil pump 1 is connected to the engine oil tank 3 through an oil inlet pipeline, the power connection relationship between the engine oil pump 1 and the engine is the same as that in the prior art, and will not be described in detail, the engine is also dynamically connected to a booster oil pump 2 through a clutch device, and the booster oil pump 2 can be directly and dynamically connected to the engine through the clutch device; the booster oil pump can also be directly in power connection with the oil pump 1 through the clutch device, and the power connection mode can be determined according to the specific model and the gear train structure of the engine, namely, the power of the booster oil pump is from the engine, but the booster oil pump can not be directly in power connection with the engine, and a power transmission chain between the booster oil pump 2 and the engine can adopt various structures, which is not described in detail here, and only the structure of the clutch device arranged between the booster oil pump 2 and the oil pump 1 is illustrated in the figure. The clutch 12 is used as the clutch, and various types of clutches such as an electromagnetic clutch in the related art can be used as the clutch, which is not exemplified here.
Referring to fig. 2, an oil outlet pipeline 4 is connected to the oil pump 1, a first branch 5 and a second branch 6 are connected to the oil outlet pipeline 4, the connection portion of the first branch and the oil outlet pipeline is closer to the oil pump than the connection portion of the second branch and the oil outlet pipeline, the oil inlet end of the booster oil pump 2 is connected to the first branch 5, the oil outlet end of the booster oil pump 2 is connected to an output oil path 7, the output oil path 7 and the second branch 6 are commonly connected to an oil supply pipeline 8 capable of providing high-pressure engine oil for engine components, the second branch, the output oil path and the oil supply pipeline are connected through a three-way pipe joint, that is, the output end of the oil supply pipeline 8 is connected to engine oil supply components such as a fuel pump, a shock absorber and the like, a first valve is arranged on the second branch 5, a second valve is arranged on the output oil path 6, and the first valve and the second valve are respectively a one-way valve 9 capable of conducting to the output end of the oil supply pipeline 8, the above-mentioned conduction to the output end of the oil supply line means that the engine oil can only flow in the direction of the oil supply line 8 when passing through the first valve and the second valve. The oil inlet end and the oil outlet end of the booster oil pump 2 are connected with an oil drainage branch 10, the connecting part of the oil drainage branch 10 and the output oil path 7 is closer to the oil outlet end than a second valve, and a pressure release valve 11 is arranged on the oil drainage branch 10.
Referring to fig. 3 and 4, when the embodiment in fig. 2 is in use, the state in fig. 3 is that the engine is in a low rotation speed state or a normal rotation speed state, the state in fig. 4 is that the engine is in a high rotation speed state, and an arrow line in the figure is a trend of engine oil, and the low rotation speed state, the normal rotation speed state and the high rotation speed state mean that, for example, when the rotation speed of the engine is lower than 2500 rpm, the engine can be called as a low rotation speed state and a normal rotation speed state, and higher than the above value, the engine can be called as a high rotation speed state, and the magnitude of the above value can be further determined according to engines of different models. When the engine is in a low rotating speed state or a normal rotating speed state, namely the state in fig. 3, the clutch 12 is closed, the engine drives the booster oil pump 2 to work, the engine oil is pumped out by the engine oil pump 1 and provides engine oil lubrication with conventional pressure for engine parts through the oil outlet pipeline 4, the pumped engine oil can also enter the first branch pipeline 5, after the boosting action of the booster oil pump 2, the boosted engine oil provides engine oil lubrication with high pressure for the engine parts through the oil supply pipeline 8, and due to the structural characteristics of the one-way valve, the oil pressure of the output oil pipeline 7 is greater than that of the second branch pipeline, so that the first valve is naturally closed, and the second valve is naturally opened; when the engine is in a high-speed state, that is, in a state shown in fig. 4, the clutch 12 is opened, the booster oil pump 2 does not work, the engine oil is pumped out by the engine oil pump 1, and at this time, the engine oil pump 1 is driven by the engine to also run at a high speed, so that the pressure of the engine oil pumped out by the engine oil pump 1 can completely reach high-pressure engine oil lubrication, the high-pressure engine oil passes through the second branch circuit 6 and then provides high-pressure engine oil lubrication for engine components through the oil supply pipeline 8, and because the booster oil pump does not work, the oil pressure in the second branch circuit 6 is naturally greater than the oil pressure in the output oil circuit 7, so that the states that the second valve is closed and the first valve is opened are realized.
The clutch controls whether the booster oil pump works or not, so that the waste of energy at high rotating speed is avoided while the engine oil pressure at low rotating speed is ensured, and the power of the engine is reduced.
The utility model is not limited to the embodiments described above, but equivalent variations of the specific structures and simple substitutions of method steps based on the present invention are within the scope of the utility model as will be apparent to those skilled in the art.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121971284.0U CN215633206U (en) | 2021-08-21 | 2021-08-21 | A dual oil pump lubrication system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121971284.0U CN215633206U (en) | 2021-08-21 | 2021-08-21 | A dual oil pump lubrication system |
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| CN215633206U true CN215633206U (en) | 2022-01-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115234339A (en) * | 2022-08-22 | 2022-10-25 | 潍柴动力股份有限公司 | Engine oil pump assembly, engine and engine oil pump speed control method |
| CN115435226A (en) * | 2022-08-24 | 2022-12-06 | 四川川润液压润滑设备有限公司 | Lubricating system |
-
2021
- 2021-08-21 CN CN202121971284.0U patent/CN215633206U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115234339A (en) * | 2022-08-22 | 2022-10-25 | 潍柴动力股份有限公司 | Engine oil pump assembly, engine and engine oil pump speed control method |
| CN115435226A (en) * | 2022-08-24 | 2022-12-06 | 四川川润液压润滑设备有限公司 | Lubricating system |
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