Forced lubrication one-way valve suitable for two-stroke engine
By designing a forced lubrication check valve in a two-stroke engine, the changes in negative and positive pressure are used to ensure that the mixed oil and gas are delivered to the lubrication point stably and reliably in each intake stroke, solving the problem of uneven lubrication and difficult to control the ratio of oil and gas mixing, and achieving forced lubrication and service life of key engine components.
Patent Information
- Application Number
- CN202422158561.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-09-04
AI Technical Summary
Under high speed and high load conditions, the lubrication of two-stroke engines is uneven and the oil and gas mixing ratio is difficult to accurately control, resulting in some parts not being fully lubricated, which in turn accelerates wear and affects the engine performance and life.
A forced lubricated check valve suitable for two-stroke engines is designed. By installing a check valve near the components that the engine needs to be lubricated, the changes in negative and positive pressure are used to ensure that the mixed oil and gas is delivered stably and reliably to the lubrication point in each intake stroke.
Forced lubrication of key components of two-stroke engines is achieved, ensuring uniformity and reliability of lubrication and extending the service life of the engine.
Smart Images
Figure CN222950805U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engine lubrication, in particular to a forced lubrication one-way valve suitable for a two-stroke engine. Background Art
[0002] In the field of internal combustion engine technology, two-stroke engines are known for their simple structure and high power-to-weight ratio. Due to their unique structural design and high energy conversion efficiency, two-stroke engines are widely used in small power machinery, motorcycles, lawn mowers, and certain types of ships. However, despite the many advantages of two-stroke engines, their lubrication systems face some unique challenges.
[0003] Traditional two-stroke engine lubrication methods mostly use mixed lubrication, that is, lubricating oil and fuel are mixed and sprayed into the cylinder together, and the cylinder wall, piston ring and other components are lubricated by the oil-gas mixture during the combustion process. Although this method is simple, it often has problems such as uneven lubrication and difficulty in accurately controlling the oil-gas mixing ratio under high speed and high load conditions, resulting in insufficient lubrication of some components, thereby accelerating wear and affecting the performance and life of the engine. Therefore, there is an urgent need for a forced lubrication check valve suitable for two-stroke engines. Utility Model Content
[0004] The utility model aims to provide a forced lubrication one-way valve suitable for a two-stroke engine to solve the problems raised in the above background technology.
[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a forced lubrication one-way valve suitable for a two-stroke engine, comprising a one-way valve housing, wherein a flow guide mechanism is arranged inside the one-way valve housing;
[0006] The flow guiding mechanism comprises an air binding port, a ventilation plate is arranged on the top of the air binding port, a one-way spring is fixedly connected to the top of the ventilation plate, a one-way blocking ball is fixedly connected to the top of the one-way spring, and a one-way blocking plate is arranged on the top of the one-way blocking ball.
[0007] Furthermore, first, the one-way valve is installed near the parts of the two-stroke engine that need forced lubrication, usually connected to the engine's lubricating oil circuit or mixed gas supply system through the joint on the left side of the one-way valve housing. When the engine is in the intake stroke and negative pressure is generated, the negative pressure acts on the one-way plugging ball, causing it to move downward and compress the one-way spring. At this time, the through hole between the one-way plugging ball and the one-way plugging plate opens, allowing the mixed oil and gas composed of fuel and air to enter the inside of the one-way valve through the air port. The mixed oil and gas passes through the oil holes on the ventilation plate, further accelerated and guided to the parts that need lubrication, during the compression and exhaust strokes. In the process, the internal pressure of the engine increases, forming a positive pressure. At this time, the one-way plugging ball moves upward under the action of the one-way spring, and re-seals the through hole between the one-way plugging plate and the one-way plugging plate, preventing the mixed oil and gas that has entered the one-way valve from flowing back to the engine or the mixed gas supply system. In this way, the mixed oil and gas are temporarily stored inside the one-way valve housing until they are transported to the lubrication point again in the next intake stroke. The design of the one-way valve ensures that the mixed oil and gas can be stably and reliably transported to the parts that need lubrication in each intake stroke, thereby realizing forced lubrication of key components of the two-stroke engine and extending the service life of the engine.
[0008] Preferably, a joint is fixedly connected to the left side of the one-way valve housing, and a through hole communicating with the one-way valve housing is provided inside the joint.
[0009] Furthermore, the connector is fixed on the left side of the one-way valve housing as an interface for connecting to an external system such as an engine oil and gas system. A through hole connected to the one-way valve housing is opened inside the connector to ensure that the mixed oil and gas can flow smoothly from the external system into the one-way valve. At the same time, it also allows the internal oil and gas to be temporarily stored or prevented from flowing out under specific conditions such as positive pressure exhaust.
[0010] Preferably, a groove is provided inside the one-way valve housing, and the air binding port is installed in the groove provided inside the one-way valve housing.
[0011] Furthermore, by installing the air port in a groove opened inside the one-way valve housing, its main function is to guide the mixed oil and gas flowing in from the vent plate, and accelerate the flow rate of the oil and gas through the through holes inside it, and finally guide it to the parts that need lubrication.
[0012] Preferably, the ventilation plate and the one-way blocking plate are both fixedly connected to the inner wall of the groove opened inside the one-way valve housing.
[0013] Preferably, a through hole is provided inside the air binding port, and a circumferentially distributed oil-through hole is provided on the surface of the ventilation plate.
[0014] Furthermore, the ventilation plate is fixedly connected to the inner wall of the groove, and the circumferentially distributed oil holes opened on it allow the mixed oil and gas to pass through, enter the air bundle port and accelerate to flow to the lubrication point, and through the through holes opened inside the air bundle port to ensure that the oil and gas can pass smoothly and accelerate the flow inside the air bundle port. The one-way blocking plate is also fixedly connected to the inner wall of the groove, and the through holes opened on it cooperate with the one-way blocking ball to realize the function of one-way ventilation.
[0015] Preferably, a through hole is provided on the surface of the one-way blocking plate, and the top of the one-way blocking ball fits with the bottom of the through hole provided on the surface of the one-way blocking plate.
[0016] Furthermore, under the action of the one-way spring, it can move up and down according to the changes in the internal pressure of the engine. When negative pressure is used to draw air, the blocking ball moves down to allow oil and gas to pass through. When positive pressure is used to exhaust air, the blocking ball moves up to prevent the oil and gas from flowing back. The through holes on the one-way blocking plate cooperate with the one-way blocking ball to ensure that the oil and gas can pass smoothly under negative pressure and are effectively blocked under positive pressure.
[0017] Compared with the prior art, the beneficial effects achieved by the utility model are:
[0018] Firstly, the utility model installs the one-way valve near the parts of the two-stroke engine that need forced lubrication, and usually connects to the lubricating oil circuit or the mixed gas supply system of the engine through the joint on the left side of the one-way valve housing. When the engine is in the intake stroke and negative pressure is generated, the negative pressure acts on the one-way plugging ball to move it downward and compress the one-way spring. At this time, the through hole between the one-way plugging ball and the one-way plugging plate is opened, allowing the mixed oil and gas composed of fuel and air to enter the inside of the one-way valve through the air bundle port. The mixed oil and gas pass through the oil holes on the ventilation plate, are further accelerated and guided to the parts that need lubrication, and in the compression and exhaust strokes, the mixed oil and gas are further accelerated and guided to the parts that need lubrication. In the process, the internal pressure of the engine increases, forming a positive pressure. At this time, the one-way plugging ball moves upward under the action of the one-way spring, and re-seals the through hole between the one-way plugging plate and the one-way plugging plate, preventing the mixed oil and gas that has entered the one-way valve from flowing back to the engine or the mixed gas supply system. In this way, the mixed oil and gas are temporarily stored inside the one-way valve housing until they are transported to the lubrication point again in the next intake stroke. The design of the one-way valve ensures that the mixed oil and gas can be stably and reliably transported to the parts that need lubrication in each intake stroke, thereby realizing forced lubrication of key components of the two-stroke engine and extending the service life of the engine. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0020] Figure 2 It is a schematic diagram of the first three-dimensional cross-sectional structure of the utility model;
[0021] Figure 3 It is a schematic diagram of the second three-dimensional cross-sectional structure of the utility model;
[0022] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model.
[0023] Among them: 1. one-way valve housing; 2. flow guide mechanism; 201. air binding port; 202. ventilation plate; 203. one-way spring; 204. one-way blocking ball; 205. one-way blocking plate. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] The utility model provides the following technical solutions:
[0026] Embodiment 1
[0027] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , a forced lubrication one-way valve suitable for a two-stroke engine, comprising a one-way valve housing 1, wherein a flow guide mechanism 2 is arranged inside the one-way valve housing 1;
[0028] The flow guiding mechanism 2 comprises an air confinement port 201 , a ventilation plate 202 is arranged on the top of the air confinement port 201 , a one-way spring 203 is fixedly connected to the top of the ventilation plate 202 , a one-way blocking ball 204 is fixedly connected to the top of the one-way spring 203 , and a one-way blocking plate 205 is arranged on the top of the one-way blocking ball 204 .
[0029] Specifically, a joint is fixedly connected to the left side of the one-way valve housing 1 , and a through hole communicating with the one-way valve housing 1 is provided inside the joint.
[0030] Specifically, a groove is provided inside the one-way valve housing 1 , and the air binding port 201 is installed in the groove provided inside the one-way valve housing 1 .
[0031] Specifically, the ventilation plate 202 and the one-way blocking plate 205 are both fixedly connected to the inner wall of the groove opened inside the one-way valve housing 1.
[0032] Specifically, a through hole is provided inside the air binding port 201 , and oil holes distributed in a circumference are provided on the surface of the air vent plate 202 .
[0033] Specifically, a through hole is opened on the surface of the one-way blocking plate 205 , and the top of the one-way blocking ball 204 fits with the bottom of the through hole opened on the surface of the one-way blocking plate 205 .
[0034] Through the above technical solution, first, the one-way valve is installed near the parts of the two-stroke engine that need forced lubrication, usually connected to the lubricating oil circuit or mixed gas supply system of the engine through the joint on the left side of the one-way valve housing 1. When the engine is in the intake stroke and negative pressure is generated, the negative pressure acts on the one-way plugging ball 204, causing it to move downward and compress the one-way spring 203. At this time, the through hole between the one-way plugging ball 204 and the one-way plugging plate 205 is opened, allowing the mixed oil and gas composed of fuel and air to enter the inside of the one-way valve through the air port 201. The mixed oil and gas passes through the oil hole on the ventilation plate 202, and is further accelerated and guided to the parts that need lubrication. During the compression and exhaust strokes, the internal pressure of the engine increases, forming a positive pressure. At this time, the one-way blocking ball 204 moves upward under the action of the one-way spring 203, and re-seals the through hole between the one-way blocking plate 205, preventing the mixed oil and gas that has entered the one-way valve from flowing back to the engine or the mixed gas supply system. In this way, the mixed oil and gas are temporarily stored in the one-way valve housing 1 until they are transported to the lubrication point again during the next intake stroke. The design of the one-way valve ensures that the mixed oil and gas can be stably and reliably transported to the components that need lubrication during each intake stroke, thereby realizing forced lubrication of key components of the two-stroke engine and extending the service life of the engine.
[0035] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit thereof, and the scope of the invention is defined by the appended claims and their equivalents.
Claims
1. A forced lubrication check valve suitable for a two-stroke engine, comprising a check valve housing (1), characterized in that: A flow guiding mechanism (2) is arranged inside the one-way valve housing (1); The flow guiding mechanism (2) comprises an air binding port (201), a ventilation plate (202) is arranged on the top of the air binding port (201), a one-way spring (203) is fixedly connected to the top of the ventilation plate (202), a one-way blocking ball (204) is fixedly connected to the top of the one-way spring (203), and a one-way blocking plate (205) is arranged on the top of the one-way blocking ball (204).
2. A forced lubrication check valve suitable for a two-stroke engine according to claim 1, characterized in that: A joint is fixedly connected to the left side of the one-way valve housing (1), and a through hole communicating with the one-way valve housing (1) is provided inside the joint.
3. A forced lubrication check valve suitable for a two-stroke engine according to claim 1, characterized in that: A groove is provided inside the one-way valve housing (1), and the air binding port (201) is installed in the groove provided inside the one-way valve housing (1).
4. A forced lubrication check valve suitable for a two-stroke engine according to claim 1, characterized in that: The ventilation plate (202) and the one-way blocking plate (205) are both fixedly connected to the inner wall of a groove opened inside the one-way valve housing (1).
5. A forced lubrication check valve suitable for a two-stroke engine according to claim 1, characterized in that: The air binding port (201) is provided with a through hole inside, and the vent plate (202) is provided with oil holes distributed in a circumferential manner on its surface.
6. A forced lubrication check valve suitable for a two-stroke engine according to claim 1, characterized in that: A through hole is provided on the surface of the one-way blocking plate (205), and the top of the one-way blocking ball (204) fits with the bottom of the through hole provided on the surface of the one-way blocking plate (205).