Integrated air pump lubrication structure for a heavy oil ignition engine

Abstract

The application discloses an integrated air pump lubricating structure for a heavy oil ignition engine, which comprises a crankcase assembly and a crankshaft two parts; the crankcase assembly comprises a crankcase, a needle bearing, an oil seal, a deep groove ball bearing and an integrated air pump cylinder sleeve; the crankcase, the crankshaft, the oil seal and the needle bearing are installed into the crankcase to form an oil-gas mixing cavity together with the crankcase. The application is based on the reasonable arrangement of engine components, realizes the breaking and refining of lubricating oil and the mixing of the lubricating oil and air to form oil mist without increasing external lubricating oil atomizer, promotes the reliable lubrication of the air injection engine integrated air pump, simplifies the engine, reduces the weight of the engine, improves the power-weight ratio of the aero-engine, and is especially suitable for the lubrication of the air injection engine integrated air pump of a small-power heavy oil ignition aero-engine.

Description

Technical Field

[0001] This invention relates to the field of small two-stroke spark-ignition heavy oil jet engine technology, specifically to an integrated air pump lubrication structure for spark-ignition heavy oil engines. Background Technology

[0002] In spark-ignition heavy oil engines, the integrated air pump supplying the air source for the jet injection device typically uses a separate lubrication system. This necessitates reserving space for the lubrication system, complicating the engine structure, increasing weight, and reducing the engine's power-to-weight ratio. Furthermore, in a separate lubrication system, the lubricating oil cannot adhere evenly when the integrated air pump is operating at high speeds, resulting in poor lubrication. Current oil mist lubrication technology for engines often requires the installation of an oil atomizer on the engine, increasing its weight and making it unsuitable for low-power aircraft engines. Summary of the Invention

[0003] To address the aforementioned problems, the present invention aims to provide an integrated air pump lubrication structure for a spark-ignition heavy oil engine. Based on the rational arrangement of the engine's own components, it achieves the atomization and mixing of lubricating oil with air to form an oil mist without adding a lubricating oil atomizer. This facilitates reliable lubrication of the integrated air pump in the air-jet engine, simplifies the engine, reduces engine weight, and improves the power-to-weight ratio of the aircraft engine. It is particularly suitable for the lubrication of integrated air pumps in low-power spark-ignition heavy oil air-jet aircraft engines.

[0004] The integrated air pump lubrication structure for a spark-ignition heavy oil engine includes a crankcase assembly 1 and a crankshaft 3. The crankcase assembly 1 comprises a crankcase 11, a needle roller bearing 12, an oil seal 13, a deep groove ball bearing 14, and an integrated air pump cylinder liner 15. The crankshaft 3 is fixed by the needle roller bearing 12 and the deep groove ball bearing 14. After the crankshaft 3, needle roller bearing 12, oil seal 13, and integrated air pump cylinder liner 15 are installed into the crankcase 11, they together form an oil-air mixing chamber 4.

[0005] Preferably, the crankcase 11 can be made by machining an aluminum alloy die-cast blank or by machining an integral aluminum alloy blank, and is designed with needle roller bearing mounting holes 111, oil seal mounting holes 113, deep groove ball bearing mounting holes 114, lubricating oil inlet 115 and oil-air mixing channel 112.

[0006] Preferably, the oil-gas mixing channel 112 connects the oil-gas premixing chamber 2 and the oil-gas mixing chamber 4.

[0007] Preferably, the oil seal 13 is positioned between the deep groove ball bearing 14 and the needle roller bearing 12, and is responsible for preventing the oil-gas mixture from leaking out to the power output end.

[0008] Preferably, the needle roller bearing 12, oil seal 13, and deep groove ball bearing 14 are all commercially available standard specifications products.

[0009] Beneficial effects

[0010] This utility model has a reasonable structure. Using this utility model, reliable lubrication of the integrated air pump for spark-ignition heavy oil engines can be effectively achieved without adding a lubricating oil atomizer to the engine body. This simplifies the engine, reduces engine weight, and thus improves the power-to-weight ratio of the aero engine. Attached Figure Description

[0011] This manual includes the following figures, which illustrate the following:

[0012] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0013] Figure 2 This is a sectional view of the crankcase assembly;

[0014] Figure 3 This is a cross-sectional view of the crankcase.

[0015] In the picture:

[0016] 1. Crankcase assembly; 11. Crankcase; 111. Needle roller bearing mounting hole;

[0017] 112 Oil-gas mixing channel; 113 Oil seal mounting hole; 114 Deep groove ball bearing mounting hole;

[0018] 115 Lubricating oil inlet; 12 Needle roller bearing; 13 Oil seal;

[0019] 14 Deep groove ball bearing; 15 Integrated air pump cylinder liner; 151 Integrated air pump inlet;

[0020] 2. Oil-air premixing chamber; 3. Crankshaft; 4. Oil-air mixing chamber;

[0021] 5. Integrated air pump bearing; 6. Integrated air pump connecting rod; 7. Integrated air pump piston pin;

[0022] 8. Integrated air pump piston; Detailed Implementation

[0023] The specific embodiments of this utility model are further described in detail below with reference to the accompanying drawings.

[0024] Please see Figure 1 , Figure 2 , Figure 3 An integrated air pump lubrication structure for an ignition-type heavy oil engine.

[0025] One of the features is an integrated air pump lubrication structure for an ignition-type heavy oil engine, comprising a crankcase assembly 1 and a crankshaft 3. The crankcase assembly includes a crankcase 11, a needle roller bearing 12, an oil seal 13, a deep groove ball bearing 14, and an integrated air pump cylinder liner 15. The crankshaft 3 is fixed by the needle roller bearing 12 and the deep groove ball bearing 14. After the oil seal 13, crankshaft 3, needle roller bearing 12, and integrated air pump cylinder liner 15 are installed into the crankcase 11, they together form an oil-air mixing chamber 4.

[0026] 1. When the engine is running, the lubricating oil entering the needle roller bearing 12 through the lubricating oil inlet 115 forms tiny oil droplets through the high-speed rotation of the needle roller bearing 12. Some of the tiny oil droplets enter the oil-air premixing chamber 2 and the other part of the tiny oil droplets enter the oil-air mixing chamber 4.

[0027] 2. The tiny oil particles entering the oil-gas premixing chamber 2 mix with the air in the oil-gas premixing chamber 2 to form a lean mixture, and then enter the oil-gas mixing chamber 4 through the oil-gas mixing channel 112 to mix again with the tiny oil particles that previously entered the oil-gas mixing chamber 4 to form a rich mixture.

[0028] 3. A portion of the rich air-fuel mixture forms an oil film on the surfaces of the integrated air pump bearing 5, the integrated air pump connecting rod 6, and the integrated air pump piston pin 7, which serves as a lubricant. When the top of the integrated air pump piston 8 descends to the integrated air pump inlet 151, another portion of the rich air-fuel mixture enters the integrated air pump cylinder through the integrated air pump inlet 151 and forms an oil film on the cylinder wall, which serves as a lubricant.

[0029] In summary, an integrated air pump lubrication structure for an ignition-type heavy oil engine achieves integrated air pump lubrication based on the rational arrangement of the engine's own components without adding a lubricating oil atomizer. This simplifies the engine, reduces its weight, and thus improves the engine's power-to-weight ratio.

Claims

1. An integrated gas pump lubrication arrangement for a spark ignition heavy duty engine comprising a crankcase assembly (1) and a crankshaft (3) ; characterized in that: The crankcase assembly (1) includes a crankcase (11), needle roller bearings (12), oil seals (13), deep groove ball bearings (14), and an integrated air pump cylinder liner (15). The oil seal (13), crankshaft (3), needle roller bearings (12), and integrated air pump cylinder liner (15) are installed into the crankcase (11) to form an oil-air mixing chamber (4). When the engine is running, the lubricating oil entering the needle roller bearings (12) through the lubricating oil inlet (115) forms tiny oil droplets due to the high-speed rotation of the needle roller bearings (12). A portion of these tiny oil droplets enter the oil-air premixing chamber (2). A portion of tiny oil particles enter the oil-gas mixing chamber (4); the tiny oil particles entering the oil-gas premixing chamber (2) mix with the air in the oil-gas premixing chamber (2) to form a lean mixture, and then enter the oil-gas mixing chamber (4) through the oil-gas mixing channel (112) to mix again with the tiny oil particles that previously entered the oil-gas mixing chamber (4) to form a rich mixture; part of the rich mixture forms an oil film on the surface of the integrated air pump bearing (5), the integrated air pump connecting rod (6), and the integrated air pump piston pin (7) to play a lubricating role, and another part enters the integrated air pump cylinder through the integrated air pump inlet (151) to form an oil film on the cylinder wall to play a lubricating role.

2. The integrated air pump lubrication structure for a spark-ignition heavy oil engine according to claim 1, characterized in that: The crankcase (11) is provided with a lubricating oil inlet (115) and an oil-gas mixing channel (112), which connects the oil-gas premixing chamber (2) and the oil-gas mixing chamber (4).

3. The integrated air pump lubrication structure for a spark-ignition heavy oil engine according to claim 1, characterized in that: The integrated air pump cylinder liner (15) is provided with an integrated air pump inlet (151). When the top of the integrated air pump piston (8) moves down to the integrated air pump inlet (151), the rich mixture enters the integrated air pump cylinder through the integrated air pump inlet (151) and forms an oil film on the cylinder wall to play a lubricating role.

4. The integrated air pump lubrication structure for a spark-ignition heavy oil engine according to claim 1, characterized in that: The oil seal (13) is positioned between the needle roller bearing (12) and the deep groove ball bearing (14), and is responsible for preventing the oil-gas mixture from leaking out to the power output end.

Images