A high compact ignition type two-stroke diesel engine crankcase inner bearing lubrication system

Abstract

The application provides a high-compact ignition type two-stroke diesel engine crankcase bearing lubrication system, which comprises a crankshaft, the crankshaft is composed of a rear crank, a front crank and a crank pin, is installed on a crankcase composed of an upper crankcase and a lower crankcase through main bearings, and the sealing between the inside of the crankcase and the outside is completed through an oil seal, a flow guide oil channel is arranged on the rear crank, the flow guide oil channel is used for conveying lubricating oil at the bottom of the crankcase to the vicinity of the bearing to complete the lubrication of the bearing, and the high-compact ignition type two-stroke diesel engine crankcase bearing lubrication system has the advantages of simple structure, good processability, improved lubrication of the main bearing under the premise of ensuring the light weight and compactness of the diesel engine, improved reliability and service life of the whole machine, and improved guarantee for further power improvement.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of internal combustion engine, and particularly relates to a high-compactness ignition type two-stroke diesel engine crankcase inner bearing lubrication system. BACKGROUND

[0002] The lubrication system of a traditional four-stroke diesel engine is closed lubrication, and the oil in the oil tank or oil sump is delivered to each lubrication point through an internal oil pump via an internal oil passage. The current ignition type two-stroke diesel engine adopts a low-cost, reliable and high-compactness design concept, and mostly adopts an open lubrication system. The lubricated oil enters the cylinder during the scavenging process and participates in combustion. Since the crankshaft is supported by grease-lubricated rolling bearings and has no lubricating oil passage, the lubricating oil circuit of the ignition type two-stroke diesel engine is greatly simplified, the structure is simpler, and the cost is greatly reduced. The ignition type two-stroke diesel engine uses safe fuel, and also has the advantages of small size, simple structure and high power-to-weight ratio, and has a wide application prospect in small special equipment.

[0003] With the increase of the rotating speed of the two-stroke diesel engine and the mechanical load, the use requirement of the bearing cannot be met by only using lubricating grease, and it is necessary to introduce lubricating oil to splash lubricate the bearing to improve the service life of the bearing. In addition, the overall arrangement is compact, and there is no enough space in the diesel engine crankcase to arrange the lubricating oil guiding structure, which is also not conducive to the diffusion of the lubricating oil mist, and has an extremely adverse effect on the lubrication of the bearing. SUMMARY

[0004] Therefore, the present application aims to provide a high-compactness ignition type two-stroke diesel engine crankcase inner bearing lubrication system, which can ensure reliability and realize the lightweight, compactness and low cost of the diesel engine.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0006] A high-compactness ignition type two-stroke diesel engine crankcase inner bearing lubrication system, comprising a crankshaft, the crankshaft is composed of a rear crank, a front crank and a crank pin, is installed on a crankcase composed of an upper crankcase and a lower crankcase through a main bearing, and the sealing between the inside of the crankcase and the outside is completed by an oil seal, characterized in that: a flow guide oil passage is arranged on the rear crank, and the flow guide oil passage is used to deliver the lubricating oil at the bottom of the crankcase to the vicinity of the bearing to complete the lubrication of the bearing.

[0007] Further, the two ends of the flow guide oil passage are respectively provided with an oil inlet hole and an oil outlet hole.

[0008] Further, the opening of the oil inlet hole ensures that the crankshaft is located below the liquid level of the crankcase when it rotates to the lowermost end, and the opening of the oil outlet hole ensures that it is opposite to the gap between the inner and outer bearing rings of the main bearing.

[0009] Further, during the operation of the diesel engine, as the crankshaft rotates, the oil inlet hole opening is immersed below the lubricating oil level of the crankcase bottom, the lubricating oil enters the oil guide channel, the lubricating oil flows in the oil guide channel under the action of inertia, and flows out from the oil outlet hole, completing the lubrication of the bearing.

[0010] Compared with the prior art, the high-compactness ignition type two-stroke diesel engine crankcase bearing lubrication system has the following advantages:

[0011] (1) The high-compactness ignition type two-stroke diesel engine crankcase bearing lubrication system has the following advantages: simple structure, good processability, improved lubrication of the main bearing under the premise of ensuring the overall light weight and compactness of the diesel engine, improved reliability and service life of the entire machine, and improved protection for further power improvement.

[0012] (2) The high-compactness ignition type two-stroke diesel engine crankcase bearing lubrication system has the following advantages: compact structure, no additional space occupied, and ensured light weight and compactness of the diesel engine.

[0013] (3) The high-compactness ignition type two-stroke diesel engine crankcase bearing lubrication system has the following advantages: improved lubrication of the main bearing in the compactness ignition type two-stroke diesel engine due to light weight, compactness, and high power. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, and are incorporated in and constitute a part of this application. The embodiments of the application illustrated in the drawings, and their description, are used to explain the application and are not intended to limit the application. In the drawings:

[0015] Figure 1 The high-compactness ignition type two-stroke diesel engine crankcase bearing lubrication system according to the embodiments of the application is shown in the accompanying drawings.

[0016] Figure 2 The high-compactness ignition type two-stroke diesel engine crankcase bearing lubrication system according to the embodiments of the application is shown in the accompanying drawings. Figure 1 ;

[0017] Figure 3 The high-compactness ignition type two-stroke diesel engine crankcase bearing lubrication system according to the embodiments of the application is shown in the accompanying drawings. Figure 2 ;

[0018] Figure 4 The high-compactness ignition type two-stroke diesel engine crankcase bearing lubrication system according to the embodiments of the application is shown in the accompanying drawings. Figure 1 ;

[0019] Figure 2 The high-compactness ignition type two-stroke diesel engine crankcase bearing lubrication system according to the embodiments of the application is shown in the accompanying drawings. Figures 1 to 5 .

[0020] BRIEF DESCRIPTION OF DRAWINGS

[0021] 1. rear crank; 11. oil inlet hole; 12. oil outlet hole; 2. front crank; 3. crank pin; 4. upper crankcase; 5. lower crankcase; 6. main bearing; 7. oil seal. DETAILED DESCRIPTION

[0022] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0023] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified and limited, the term "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0026] A high-compactness ignition type two-stroke diesel engine crankcase bearing lubrication system, as shown in Figure 2 The crankshaft is composed of a rear crank 1, a front crank 2 and a crank pin 3, is installed on a crankcase composed of an upper crankcase 4 and a lower crankcase 5 through a main bearing 6, and completes the sealing between the inside of the crankcase and the outside through an oil seal 7. A flow guide oil channel is arranged on the rear crank 1, which is used to transport the lubricating oil at the bottom of the crankcase to the vicinity of the bearing to complete the lubrication of the bearing.

[0027] The highly compact crankcase bearing lubrication system of the spark-ignition two-stroke diesel engine of this scheme has a simple structure, good processability, and does not occupy additional space. It improves the lubrication of the main bearing while ensuring the overall lightweight and compact requirements of the diesel engine, thereby increasing the reliability and service life of the entire machine and providing a better guarantee for further power improvement.

[0028] The two ends of the oil guide channel are respectively an oil inlet hole 11 and an oil outlet hole 12 .

[0029] The opening of the oil inlet hole 11 ensures that the crankshaft is located below the crankcase liquid level when it rotates to its lowest end, and the opening of the oil outlet hole 12 ensures that it faces the gap between the inner and outer bearing rings of the main bearing 6.

[0030] As attached Figure 3 and attached Figure 4 As shown, during the operation of the diesel engine, as the crankshaft rotates, the oil inlet hole 11 opens below the lubricating oil level at the bottom of the crankcase, and the lubricating oil enters the guide oil channel, as shown in the attached figure. Figure 5 and attached ​ As shown, the lubricating oil flows in the guide oil channel under the action of inertia and flows out from the oil outlet hole 12 to complete the lubrication of the bearing.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-compactness ignition type two-stroke diesel engine crankcase inner bearing lubrication system, comprising a crankshaft composed of a rear crank, a front crank, a crank pin, installed on a crankcase composed of an upper crankcase and a lower crankcase through a main bearing, and the sealing between the inside of the crankcase and the outside is completed by an oil seal, characterized in that: The oil guiding channel is arranged on the rear crank, and is used for conveying the lubricating oil at the bottom of the crankcase to the bearing to complete lubrication of the bearing; The oil guiding channel is provided with an oil inlet hole and an oil outlet hole at two ends thereof respectively; The opening of the oil inlet hole ensures that the crankshaft is located below the liquid surface of the crankcase when the crankshaft rotates to the lowermost end, and the opening of the oil outlet hole ensures that it is opposite the gap between the inner bearing ring and the outer bearing ring of the main bearing.

2. A high-compactness ignition two-stroke diesel engine crankcase inner bearing lubrication system according to claim 1, characterized in that: During the operation of the diesel engine, with the rotation of the crankshaft, the opening of the oil inlet hole is immersed below the lubricating oil liquid surface at the bottom of the crankcase, the lubricating oil enters the oil guiding channel, flows in the oil guiding channel under the action of inertia, and flows out from the oil outlet hole, thereby completing the lubrication of the bearing.

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