WO2016062180A1

WO2016062180A1 - Engine oil pump and engine lubrication system thereof

Info

Publication number: WO2016062180A1
Application number: PCT/CN2015/090380
Authority: WO
Inventors: 王竹平
Original assignee: 奇瑞汽车股份有限公司; 芜湖普威技研有限公司
Priority date: 2014-10-20
Filing date: 2015-09-23
Publication date: 2016-04-28
Also published as: CN104405469A

Abstract

An engine oil pump comprises a main pump (1) and an auxiliary pump (2-4). The main pump and the auxiliary pump use a segmented structure. The main pump and the auxiliary pump share one drive shaft (26). The main pump and the auxiliary pump are each provided with an oil inlet port (8-11) and an oil outlet port (12-15). Also provided is an engine lubrication system, comprising an oil bottom shell, an engine lubricating oil passage, and an oil collection container. The oil inlet port of the auxiliary pump is in communication with the oil bottom shell, the oil outlet port of the auxiliary pump is in communication with the oil collection container, the oil inlet port of the main pump is in communication with the oil collection container, and the oil outlet port of the main pump is in communication with the engine lubricating oil passage. Thereby, it is ensured that when the engine operates at a large tilt angle, the lubricating oil can be continuously circulated in the engine to provide lubrication.

Description

Engine oil pump and engine lubrication system thereof

Technical field

The invention relates to an engine oil pump and an engine lubricating system thereof, and belongs to the technical field of engine lubrication.

Background technique

In the engine lubrication system, the oil pump is an important component. Its function is to provide a certain pressure of oil to the various motion pairs and hydraulic components in the engine and to establish oil film lubrication to ensure the normal operation of the engine.

Under normal operating conditions of the engine, the oil pump delivers the oil in the oil sump to each of the motion pairs and hydraulic components, and the oil after the lubrication is quickly returned to the oil sump, so the oil in the engine is continuously passed through the oil pump. Continuously repeating the work in the various sports and hydraulic components.

However, the engine is in some extreme working conditions, such as car stunts driving on one side of the wheel, climbing steep slopes, etc., the engine and the oil pan are inclined at a large angle, the oil returning after the lubrication is difficult, and the oil is too "lost" in the oil pan. This can cause the oil pump to absorb insufficient oil or even absorb oil, which affects the normal lubrication of the engine.

Summary of the invention

The technical problem to be solved by the present invention is to provide an engine oil pump and an engine lubricating system thereof for the deficiencies of the prior art, and the engine ensures that the oil continuously participates in the engine lubrication work continuously under the large angle tilting condition.

The technical problem to be solved by the present invention is achieved by the following technical solutions:

An engine oil pump includes a main pump and a sub-pump. The main pump and the sub-pump adopt a segmented structure. The main pump and the sub-pump share a drive shaft, and the main pump and the sub-pump are respectively provided with independent The oil inlet and outlet.

The main shaft is provided with a main pump driving gear matched with a main pump driven gear on a driven shaft of the main pump in the main pump, and a sub-pump driven gear on a driven shaft of the auxiliary pump in the auxiliary pump. Fitted secondary pump drive gear.

The secondary pumps are a set of secondary pumps arranged side by side.

The main pump is provided with an oil pump pressure limiting valve.

A gear or a sprocket is disposed on the outer end of the drive shaft.

The main pump and the sub-pump are fixed together by bolts through fixing holes on the respective housings.

The material of the main pump driven gear and the auxiliary pump driven gear are all plastic.

The axis of the main pump driven shaft coincides with the axis of the secondary pump driven shaft.

The drive shaft and the main pump driven shaft and the secondary pump driven shaft are both hollow shafts.

The present invention also provides an engine lubrication system having the engine oil pump, including an oil sump and an engine lubricating oil passage, and an oil collecting container, wherein a auxiliary pump inlet port of the auxiliary pump is connected to the oil sump, The auxiliary pump outlet port is in communication with the oil collecting container, and the main pump inlet port of the main pump is in communication with the oil collecting container, and the main pump oil outlet is in communication with the engine lubricating oil passage.

Compared with the prior art, the invention has the following advantages:

The main pump supplies a certain amount of oil lubrication and working pressure to each movement pair and hydraulic component of the engine, and collects the oil returned from the lubrication work of the engine through the auxiliary pump and delivers it to the designated oil collection container, which is collected by the main pump. The lubricating oil in the oil container is pumped into the lubricating oil passage of the engine. Under the condition of large angle tilting, the engine can ensure the continuous circulation of the engine oil and participate in the lubrication work normally; the auxiliary pump collects the lubricating oil in the oil sump into the oil collecting container. Therefore, the height of the oil pan itself can be greatly reduced, so that the oil pan can be easily arranged, and the ground clearance of the oil pan is increased; the main pump and the sub-pump adopt a segmented structure, and each sub-pump has the same structure, taking into consideration The seriality and versatility of the product; the drive shaft and the driven shaft of the main pump and the auxiliary pump are designed as hollow core structures, and the driving gear is made of powder metallurgy material and the driven gear is made of plastic material, which reduces the weight of the oil pump assembly and reduces the weight. cost.

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

DRAWINGS

Figure 1 is a perspective view of the engine oil pump of the present invention;

2 is a front view of the engine oil pump of the present invention;

Figure 3 is a cross-sectional view of the oil pump of the present invention along the center of the gear;

Figure 4 is a schematic cross-sectional view showing a pressure limiting valve of the oil pump of the present invention;

Figure 5 is a schematic view showing the structure of the driving end of the oil pump of the present invention.

Description of the reference signs:

1. Main pump, 2. Sub-pump I, 3. Sub-pump II, 4. Sub-pump III, 5. Bolt, 6. Nut, 7. Mounting boss, 8. Main pump inlet, 9. Sub-pump Port I, 10. Sub-pump inlet port II, 11. Sub-pump inlet port III, 12. Main pump outlet port, 13. Sub-pump outlet port I, 14. Sub-pump outlet port II, 15. Sub-pump outlet III, 21. rear housing, 22. main pump housing, 23. sub-pump housing, 24. front housing, 26. drive shaft, 27. oil seal, 28. collar, 30. Pump driven shaft, 31. Main pump driven shaft, 32. Main pump drive gear, 33. Sub-pump drive gear, 34. Sub-pump driven gear, 35. Main pump driven gear, 36.O-ring, 41 Pressure relief valve, 42. Pressure limiting valve inlet hole, 43. Oil drain hole.

detailed description

The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

1 is a schematic perspective view of an engine oil pump of the present invention; FIG. 2 is a front view of the engine oil pump of the present invention; FIG. 3 is a cross-sectional view of the oil pump of the present invention along a center surface of the gear; Figure 5 is a schematic view showing the structure of the driving end of the oil pump of the present invention. As shown in FIG. 1 to FIG. 5, the engine oil pump includes a main pump 1 and three sub-pumps, and the three sub-pumps are a sub-pump I2, a sub-pump II3, and a sub-pump III4, wherein the main pump 1 and three A segmented side-by-side structure is adopted between the sub-pumps, and the main pump housing 22 and the sub-pump housing 23 pass through the fixing holes on the respective housings through the four bolts 5, and are locked by four corresponding nuts 6. Side by side fixed together. The auxiliary pump can be assembled into a series of products according to the engine design and layout requirements.

The main pump 1 and the three sub-pumps share a driving shaft 26, and the front end of the driving shaft 26 and the front housing 24 are sealed by an oil seal 27, and the oil seal 27 is fixedly mounted on the front housing 24 through the collar 28; the outer end of the driving shaft 26 It is equipped with gears or sprockets and is driven by a chain or gear pair.

The three auxiliary pumps are arranged side by side near the outer end of the driving shaft 26, the casing of the auxiliary pump III is the front casing 24 of the oil pump, the auxiliary pump III4, the auxiliary pump II3, the auxiliary pump I2, and the main pump 1 are sequentially from the outer end of the driving shaft. It is provided that the main pump housing 22 is fitted and fixed together with the rear housing 21 of the oil pump. The three sub-pumps and one main pump form an assembly, and the oil pump assembly is fixedly mounted on the engine block through the mounting boss 7.

The main shaft 26 is provided with a main pump driving gear 32 adapted to the main pump driven gear 35 on the main pump driven shaft 31 in the main pump, and a sub-pump on the auxiliary pump driven shaft 30 in the sub-pump. The movable gear 34 is fitted with a secondary pump drive gear 33. The main pump and the auxiliary pump are provided with independent oil inlets and oil outlets, specifically, the main pump inlet port 8 and the main pump outlet port 12 on the main pump, and the auxiliary pump inlet port on the auxiliary pump I. I9 and auxiliary pump outlet I13, sub-pump inlet port II10 and sub-pump outlet port II14 on sub-pump II, sub-pump inlet port III11 and sub-pump outlet port III15 on sub-pump III, of which The respective oil inlets of the pump and the auxiliary pump are arranged side by side, and the respective oil outlets of the main pump and the auxiliary pump are arranged side by side.

The front casing 24 of the main pump and the sub-pump, the sub-pump casing 23, the main pump casing 22, and the rear casing 21 are sealed by an O-ring 36 between adjacent casings.

The main pump 1 and the sub-pump are gear type oil pumps, and the driven gears of the main pump 1 and the sub-pump are separately assembled on the respective driven shafts, and the axis of the main pump driven shaft 31 and the auxiliary pump driven shaft 30 are assembled. The axes coincide. By adopting such a structure, the versatility of the product serial design components is improved, and the assembly of the assembly is facilitated.

The main pump 1 is provided with an oil pump pressure limiting valve. The oil pump pressure limiting valve is an internal leakage type structure and is installed on the rear casing; the oil pump pressure limiting valve includes a pressure relief valve 41, a pressure limiting valve oil inlet hole 42, and a drain oil. Hole 43, the pressure-receiving valve inlet hole is reliable, the main pump outlet port is set, and the drain hole is reliable for the main pump inlet port setting.

The drive shaft 26 and the main pump driven shaft 31 and the auxiliary pump driven shaft 30 are both hollow shafts; the pump driven gear and the secondary pump are The material of the moving gear is plastic, and the driving gear material is powder metallurgy, which greatly reduces the weight of the assembly and reduces the cost.

The invention also provides an engine lubrication system having the above engine oil pump, comprising an oil sump and an engine lubricating oil passage and an oil collecting container, wherein the auxiliary pump inlet port of the auxiliary pump is connected with the oil sump, and the auxiliary pump outlet port In communication with the oil collecting container, the main pump inlet port of the main pump is in communication with the oil collecting container, and the main pump oil outlet is in communication with the engine lubricating oil passage.

The oil returned from the lubrication work of the engine is collected by the auxiliary pump and sent to the designated oil collecting container. The lubricating oil in the oil collecting container is pumped into the lubricating oil passage of the engine through the main pump, and the moving parts and hydraulic components of the engine are transmitted to the engine through the main pump. Provide a certain amount of oil lubrication and working pressure. Under high-angle tilting conditions, the engine can ensure continuous circulation of engine oil and participate in lubrication work normally.

Since the auxiliary pump collects the lubricating oil in the oil sump into the oil collecting container, the height of the oil sump itself can be greatly reduced, so that the oil sump can be easily arranged, and the ground clearance of the oil sump is increased.

The present invention has been exemplarily described with reference to the drawings, and it is obvious that the present invention is not limited to the above-described manner, as long as various insubstantial improvements made by the concept and technical solution of the present invention are adopted, or The concept and technical solution of the present invention are directly applicable to other occasions, and are all within the protection scope of the present invention.

Claims

An engine oil pump, comprising: a main pump (1) and a sub-pump, wherein the main pump and the sub-pump adopt a segmented structure, and the main pump and the sub-pump share a drive shaft (26), The main pump and the auxiliary pump are provided with independent oil inlets and oil outlets.
The engine oil pump according to claim 1, wherein said drive shaft (26) is respectively adapted to be adapted to a main pump driven gear (35) on a main pump driven shaft (31) in the main pump. The main pump drive gear (32), the sub-pump drive gear (33) that is adapted to the sub-pump driven gear (34) on the secondary pump slave shaft (30).
The engine oil pump according to claim 1, wherein said sub-pump is a group of sub-pumps arranged side by side, and said sub-pumps are three, respectively sub-pump I (2) and sub-pump II (3) And the secondary pump III (4).
The engine oil pump according to claim 1, wherein said main pump (1) is provided with an oil pump pressure limiting valve.
The engine oil pump according to claim 1, wherein said outer shaft of said drive shaft (26) is provided with a gear or a sprocket.
The engine oil pump according to claim 1, characterized in that the main pump (1) and the sub-pump are fixed together by bolts (5) through fixing holes in the respective casings.
The engine oil pump according to claim 2, wherein said main pump driven gear (35) and said secondary pump driven gear (34) are made of plastic.
The engine oil pump according to claim 2, characterized in that the axis of the main pump driven shaft (31) coincides with the axis of the sub-pump driven shaft (30).
The engine oil pump according to claim 2, wherein said main shaft (26) and said main pump driven shaft (31) and said sub-pump driven shaft (34) are hollow shafts.
An engine lubrication system having the engine oil pump of claim 1 comprising an oil sump and a hair sump The motive lubricating oil passage is characterized in that: the oil collecting container is further included, the auxiliary pump inlet port of the auxiliary pump is in communication with the oil pan, and the auxiliary pump oil outlet is connected to the oil collecting container, and the main pump main The pump inlet port is in communication with the oil collecting container, and the main pump outlet port is in communication with the engine lubricating oil passage.