CN214787594U

CN214787594U - Self-lubricating system for two-stroke piston engine

Info

Publication number: CN214787594U
Application number: CN202121073463.2U
Authority: CN
Inventors: 常书增; 田昊; 辛磊; 崔德灿; 谭树玖
Original assignee: Shandong Feiao Aircraft Engine Co ltd
Current assignee: Shandong Feiao Aircraft Engine Co ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2021-11-19
Anticipated expiration: 2031-05-19

Abstract

The utility model provides a two-stroke piston engine's self-lubricating system, its characterized in that: including engine, oil bag intake pipe, oil bag play oil pipe, the oil bag includes reservoir and oil storage chamber, separates through the diaphragm between reservoir and the oil storage chamber, is equipped with the oil filler on the oil storage chamber, and oil bag intake pipe inlet end and engine exhaust passage intercommunication, oil bag intake pipe give vent to anger end and reservoir intercommunication, and oil bag goes out oil pipe inlet end and oil storage chamber intercommunication, and oil bag goes out oil pipe and goes out oil end and engine inlet passage intercommunication. The utility model has the advantages that: compared with the traditional mixed lubrication mode of a non-direct injection two-stroke piston engine, the cylinder scuffing phenomenon is effectively improved; compared with the traditional separated lubrication mode of a direct injection two-stroke piston engine, the oil injector is omitted, the oil bag replaces the oil pump, and the cost can be greatly saved under the condition of similar lubrication effect.

Description

Self-lubricating system for two-stroke piston engine

Technical Field

The utility model relates to a two-stroke piston engine's technical field.

And in particular to a self-lubricating system for a two-stroke piston engine.

Background

When the two-stroke piston engine works at present, many transmission parts do high-speed relative motion under a small clearance, such as a crankshaft main journal and a main bearing, a crank pin and a connecting rod bearing, a cam journal and a cam bearing, a piston ring and a cylinder wall surface and the like. Although the working surfaces of these parts are finely machined, the surfaces are, on an enlarged scale, rough. Without lubricating these surfaces, strong friction will occur between them. Dry friction between metal surfaces not only increases the power consumption of the engine and accelerates wear of the working surfaces of the parts, but may also burn the working surfaces of the parts due to the heat generated by the friction, rendering the engine inoperative. The lubricating system has the function of continuously conveying clean engine oil with sufficient quantity and proper temperature to all friction surfaces of the transmission parts when the engine works, and an oil film is formed between the friction surfaces to realize liquid friction. Therefore, the friction resistance is reduced, the power consumption is reduced, and the abrasion of parts is reduced, so that the aims of improving the working reliability and the durability of the engine are fulfilled. The existing two-stroke engine lubrication mode is that fuel oil and engine oil are mixed by sharing an oil tank; the lubrication is separated, namely, the fuel oil and the engine oil are separated to enter the engine.

The existing non-direct injection two-stroke engine lubrication mode is that fuel oil and engine oil are mixed and then enter an engine box body to participate in lubrication together and also participate in combustion together. The method has the advantages that the oil consumption is large, and the cylinder sleeve is less in oil adhesion and insufficient in lubrication, so that the cylinder pulling phenomenon is caused when the engine is operated at a high speed. In the existing separated lubrication system of the direct injection two-stroke engine, an oil pump is mostly used for providing high-pressure engine oil, an oil injection nozzle is used for injecting the engine oil, the engine oil does not participate in combustion, the cylinder pulling condition can be improved, and the relative cost is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the weak point of above-mentioned conventional art, provide the easy emergence that improves in the traditional lubricated mode and draw the jar phenomenon to and the two-stroke piston engine's of the relatively higher problem of cost self-lubricating system.

The purpose of the utility model is achieved through the following technical measures:

self-lubricating system of two-stroke piston engine, characterized in that: including engine, oil bag intake pipe, oil bag play oil pipe, the oil bag includes reservoir and oil storage chamber, separates through the diaphragm between reservoir and the oil storage chamber, is equipped with the oil filler on the oil storage chamber, and oil bag intake pipe inlet end and engine exhaust passage intercommunication, oil bag intake pipe give vent to anger end and reservoir intercommunication, and oil bag goes out oil pipe inlet end and oil storage chamber intercommunication, and oil bag goes out oil pipe and goes out oil end and engine inlet passage intercommunication.

According to the specific optimization scheme, the engine exhaust passage comprises a main exhaust passage, a first exhaust passage communicated with the outside and a second exhaust passage communicated with an oil bag, one end of the main exhaust passage is communicated with an engine exhaust port, and the other end of the main exhaust passage is communicated with the first exhaust passage and the second exhaust passage respectively.

The utility model provides a concrete optimization scheme, engine inlet channel one end and engine crankcase intercommunication, the other one end of inlet channel and external intercommunication, the last oil inlet that is equipped with of inlet channel, oil inlet and oil bag play oil pipe intercommunication.

The engine comprises a cylinder body and a crankcase which are connected with each other, a piston which can move up and down is arranged in the cylinder body, a crankshaft is arranged in the crankcase, the piston is connected with the crankshaft through a connecting rod, and a spark plug is arranged above the cylinder body.

A specific optimization scheme is that the inner wall of the cylinder body is provided with an exhaust port.

A specific optimization scheme is that an air inlet scavenging passage is arranged in a cylinder body.

Owing to adopted above-mentioned technical scheme, compare with prior art, the utility model has the advantages that:

compared with the traditional mixed lubrication mode of a non-direct injection two-stroke piston engine, the cylinder scuffing phenomenon is effectively improved; compared with the traditional separated lubrication mode of a direct injection two-stroke piston engine, the oil injector is omitted, the oil bag replaces the oil pump, and the cost can be greatly saved under the condition of similar lubrication effect.

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Drawings

Fig. 1 is a schematic structural diagram of a self-lubricating system of a two-stroke piston engine according to the present invention.

Fig. 2 is a schematic diagram of the internal structure of the self-lubricating system of the two-stroke piston engine according to the present invention.

In the figure: 1-a cylinder body; 2-a piston; 3-a connecting rod; 4-a spark plug; 5-a crankshaft; 6-a crankcase; 7-an engine intake passage; 8-an exhaust port; 9-an air inlet scavenging passage; 10-engine exhaust passage; 11-oil bag air inlet pipe; 12-oil bag; 13-an air reservoir; 14-an oil reservoir; 15-oil filler; 16-oil bag oil outlet pipe; 101-a main exhaust channel; 102-a first exhaust duct; 103-second exhaust duct.

Detailed Description

Example (b): as shown in fig. 1-2, the self-lubricating system of the two-stroke piston 2 type engine comprises an engine, an oil bag 12, an oil bag air inlet pipe 11 and an oil bag oil outlet pipe 16, wherein the oil bag 12 comprises an air storage chamber 13 and an oil storage chamber 14, the air storage chamber 13 and the oil storage chamber 14 are separated through a diaphragm, an oil filling port 15 is arranged on the oil storage chamber 14, an air inlet end of the oil bag air inlet pipe 11 is communicated with an engine exhaust channel 10, an air outlet end of the oil bag air inlet pipe 11 is communicated with the air storage chamber 13, an oil inlet end of the oil bag oil outlet pipe 16 is communicated with the oil storage chamber 14, and an oil outlet end of the oil bag oil outlet pipe 16 is communicated with an engine air inlet channel 7.

The gas storage chamber 13 and the oil storage chamber 14 are separated and not communicated with each other, the oil bag 12 is a flexible soft bag which can deform as required, and the initial air amount in the gas storage chamber 13 is reserved with the expansion allowance of the oil bag 12; the amount of oil in the oil reservoir chamber 14 is constantly in a pressure-discharged state.

The engine exhaust passage 10 comprises a main exhaust passage 101, a first exhaust passage 102 communicated with the outside and a second exhaust passage 103 communicated with the oil bag 12, wherein one end of the main exhaust passage 101 is communicated with an engine exhaust port, and the other end of the main exhaust passage 101 is respectively communicated with the first exhaust passage 102 and the second exhaust passage 103.

One end of an engine air inlet channel 7 is communicated with an engine crankcase 6, the other end of the air inlet channel is communicated with the outside, an oil inlet is arranged on the air inlet channel, and the oil inlet is communicated with an oil bag outlet pipe 16.

The oil bag air inlet pipe 11 is a flexible hose and is respectively communicated with the first exhaust pipe 102 and the air storage chamber 13 through a pipe joint or directly in an inserting mode, and the oil bag oil outlet pipe 16 is respectively communicated with the engine air inlet channel 7 and the oil storage chamber 14 through a pipe joint or directly in an inserting mode.

The engine comprises a cylinder body 1 and a crankcase 6 which are connected with each other, a piston 2 which can move up and down is arranged in the cylinder body 1, a crankshaft 5 is arranged in the crankcase 6, the piston 2 and the crankshaft 5 are connected through a connecting rod 3, and a spark plug 4 is arranged above the cylinder body 1.

The inner wall of the cylinder body 1 is provided with an exhaust port 8.

An air inlet scavenging passage 9 is arranged in the cylinder body 1.

Wherein: the piston 2 moves to the top dead center of the cylinder body 1, the spark plug 4 ignites, waste gas generated after mixed gas in the cylinder burns descends to the exposed exhaust port 8 along with the piston 2, the waste gas flows out of the cylinder through the engine exhaust passage 10, the second exhaust passage 103 is connected with the oil bag air inlet pipe 11, the other end of the oil bag air inlet pipe 11 is connected with the air storage chamber 13, and a diaphragm is arranged in the middle of the oil bag 12. The waste gas continuously enters the air storage chamber 13 of the oil bag 12 along the air inlet pipe 11 of the oil bag, so that the pressure of the air storage chamber 13 is increased, and the oil storage chamber 14 adjacent to the air storage chamber is continuously extruded. The oil storage chamber 14 is provided with an oil filler 15 and an oil bag outlet pipe 16, the other end of the oil bag outlet pipe 16 is connected to the intake passage 7 of the engine, and when the oil storage chamber 14 is pressed by the air reservoir 13, the internal lubricating oil flows to the intake passage 7 along the oil bag outlet pipe 16. The gas in the crankcase 6 is extruded along with the downward movement of the piston 2, and enters the cylinder when the air inlet scavenging port is exposed; the crankshaft rotates by inertia so that a negative pressure environment is formed in the crankcase 6 after the piston moves upwards. At this time, the outside air forms strong airflow in the air inlet channel 7 under the action of atmospheric pressure, and the lubricating oil flowing out of the oil outlet pipe is blown into granular oil mist, and enters the crankcase 6 along with the airflow. The oil mist is partially attached to the crankshaft 5, the connecting rod 3, the inner wall of the cylinder block 1 and other parts, and partially moves to the air inlet scavenging passage 9 along with the piston 2 and then enters the cylinder, and the lubrication of the working parts of the cylinder is completed in the process. The engine is suitable for all direct injection two-stroke engines.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should fall within the patent coverage of the present invention.

Claims

1. Self-lubricating system of two-stroke piston engine, characterized in that: including engine, oil bag intake pipe, oil bag play oil pipe, the oil bag includes reservoir and oil storage chamber, separates through the diaphragm between reservoir and the oil storage chamber, is equipped with the oil filler on the oil storage chamber, and oil bag intake pipe inlet end and engine exhaust passage intercommunication, oil bag intake pipe give vent to anger end and reservoir intercommunication, and oil bag goes out oil pipe inlet end and oil storage chamber intercommunication, and oil bag goes out oil pipe and goes out oil end and engine inlet passage intercommunication.

2. Self-lubricating system of a two-stroke piston engine according to claim 1, characterised in that: the engine exhaust passage comprises a main exhaust passage, a first exhaust passage communicated with the outside and a second exhaust passage communicated with the oil bag, one end of the main exhaust passage is communicated with the inside of the engine, and the other end of the main exhaust passage is respectively communicated with the first exhaust passage and the second exhaust passage.

3. Self-lubricating system of a two-stroke piston engine according to claim 1, characterised in that: one end of the engine air inlet channel is communicated with the engine crankcase, the other end of the engine air inlet channel is communicated with the outside, an oil inlet is formed in the engine air inlet channel, and the oil inlet is communicated with the oil bag outlet pipe.

4. A self-lubricating system for a two-stroke piston engine according to any of claims 1-3, characterised in that: the engine comprises a cylinder body and a crankcase which are connected with each other, a piston is movably connected in the cylinder body, a crankshaft is arranged in the crankcase, the piston is connected with the crankshaft through a connecting rod, and a spark plug is arranged above the cylinder body.

5. Self-lubricating system of a two-stroke piston engine according to claim 4, characterised in that: the inner wall of the cylinder body is provided with an exhaust port.

6. Self-lubricating system of a two-stroke piston engine according to claim 4, characterised in that: an air intake scavenging passage is arranged in the cylinder body.