Inlet valve seat ring

Abstract

The invention discloses an intake valve seat ring which is used for improving the performance of an engine. The seat ring comprises a seat ring body, a baffle ring and a baffle, the seat ring body is installed on a cylinder cover of an engine, and a round hole face, a first inclined face and a second inclined face are arranged on an inner ring of the seat ring body. The round hole surface, the first inclined surface and the second inclined surface are sequentially connected; the baffle ring is arranged at one end of the seat ring body and is connected with the circular hole surface; the baffle is arranged on the inner ring of the baffle ring and used for blocking part of inlet gas so as to increase the flow speed of the inlet gas of the engine; the inner diameter of the baffle ring is the same as that of the seat ring body, and the outer diameter of the baffle ring is smaller than that of the seat ring body.

Description

Technical Field

[0001] The present application relates to the field of mechanical technology, and in particular to an intake valve seat ring. Background Art

[0002] An engine is a device that converts the chemical energy of fuel into mechanical energy. It is mainly used to drive various mechanical equipment and vehicles. The gas generated by burning fuel expands and pushes the piston or rotor to generate power. Engines are used in vehicles such as cars, ships, and airplanes, as well as industrial machinery and power generation equipment. The performance of the engine directly affects the efficiency, response speed, and power output of these applications. Among them, the intake duct in the engine is mainly used to guide air or mixed gas into the cylinder, making full use of the kinetic energy of the airflow, thereby achieving better air distribution and combustion efficiency.

[0003] In the prior art, the engine adopts an intake duct with a tangential structure, which strongly contracts in front of the valve seat to guide the airflow into the cylinder in a unilateral tangential direction, creating an intake vortex, or adopts an intake duct with a spiral structure. By making a spiral shape in the valve cavity above the valve seat, the airflow forms a rotational motion before entering the cylinder, thereby generating a stronger vortex, thereby improving the mixing effect of the airflow, allowing the fuel to burn more fully, and improving the power output of the engine.

[0004] However, when the engine uses an intake duct with a tangential structure or a spiral structure, the airflow turns or changes direction in the intake duct, which can easily cause uneven airflow distribution and poor mixing in the cylinder, affecting the engine's combustion rate and causing a decrease in the overall performance of the engine. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a valve seat ring.

[0006] The present application provides an intake valve seat ring, comprising: a seat ring body, a baffle ring and a baffle;

[0007] The seat ring body is installed on the cylinder head of the engine, and the inner ring of the seat ring body is provided with a circular hole surface, a first inclined surface and a second inclined surface;

[0008] The circular hole surface, the first inclined surface and the second inclined surface are connected in sequence;

[0009] The baffle ring is arranged at one end of the seat ring body and connected to the circular hole surface;

[0010] The baffle is arranged on the inner circle of the baffle ring, and the baffle is used to block part of the intake gas to increase the flow speed of the intake gas of the engine;

[0011] The inner diameter of the baffle ring is the same as the inner diameter of the seat ring body, and the outer diameter of the baffle ring is smaller than the outer diameter of the seat ring body.

[0012] Optionally, the baffle is a semicircular structure or a crescent-shaped structure.

[0013] Optionally, the baffle has a thickness of 1 mm.

[0014] Optionally, the inclination of the first slope is 45°, and the first slope is used to seal with the outer conical surface of the intake valve of the engine.

[0015] Optionally, the inclination of the second inclined surface is 30°, and the second inclined surface is used to cooperate with the valve limiting annular surface of the engine.

[0016] Optionally, one end of the seat ring body is provided with an outer chamfer for sealing with the cylinder head.

[0017] Optionally, the seat ring body, the baffle ring and the baffle are cast as one piece.

[0018] Optionally, the seat ring body, the baffle ring and the baffle are made of alloy cast iron or austenitic steel.

[0019] It can be seen from the above technical solutions that this application has the following advantages:

[0020] 1. The intake valve seat is located at the outlet of the intake duct. The baffle on the intake valve seat can increase the gas flow coefficient, making the mixture of the gas engine more evenly mixed or the gas and fuel mixed more evenly in the engine cylinder, which is beneficial to increase the combustion rate of the engine and improve the overall performance of the engine.

[0021] 2. Adding a baffle to the intake valve seat ring to change the airflow makes the manufacturing process simpler than changing the intake duct, while reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution in the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic structural diagram of an embodiment of an intake valve seat ring provided by the present application;

[0024] Figure 2 A schematic structural diagram of another embodiment of an intake valve seat ring provided by the present application;

[0025] Figure 3 A schematic cross-sectional structure diagram of an embodiment of an intake valve seat ring provided in the present application. DETAILED DESCRIPTION

[0026] In order to solve the above technical problems, the present application provides an intake valve seat ring for improving engine performance.

[0027] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only used to illustrate the relative positional relationships between the various components or components, and do not particularly limit the specific installation orientations of the various components or components.

[0028] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0029] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In addition, the structures, proportions, sizes, etc. drawn in the drawings in the present application are only used to match the contents disclosed in the specification for the technical personnel in this field to understand and read, and are not used to limit the restrictive conditions under which the present application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present application without affecting the effects and purposes that can be achieved by the present application.

[0031] The following will be combined with the drawings in this application to clearly and completely describe the technical solutions in this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] See also Figure 1 , the present application provides an intake valve seat ring, comprising: a seat ring body 1, a baffle ring 2 and a baffle 3;

[0033] The seat ring body 1 is installed on the cylinder head of the engine, and the inner ring of the seat ring body 1 is provided with a circular hole surface 11, a first inclined surface 12 and a second inclined surface 13;

[0034] The circular hole surface 11, the first inclined surface 12 and the second inclined surface 13 are connected in sequence;

[0035] The baffle ring 2 is arranged at one end of the seat ring body 1 and connected to the circular hole surface 11;

[0036] The baffle plate 3 is arranged on the inner circle of the baffle plate ring 2, and the baffle plate 3 is used to block part of the intake gas to increase the flow speed of the intake gas of the engine;

[0037] The inner diameter of the baffle ring 2 is the same as the inner diameter of the seat ring body 1 , and the outer diameter of the baffle ring 2 is smaller than the outer diameter of the seat ring body 1 .

[0038] The following describes in detail the various components in this embodiment:

[0039] Seat ring body 1: The main part of the intake valve seat ring, used to seal the gap between the intake valve and the intake valve seat of the engine, thereby preventing air and moisture from entering the engine, avoiding their impact on the engine and extending the life of the engine

[0040] Baffle ring 2: used to connect the seat ring body 1 and the baffle 3.

[0041] Baffle 3: used to block part of the intake gas to increase the intake gas flow speed of the engine.

[0042] Circular hole surface 11: a channel for gas flow, allowing the gas to flow smoothly into the cylinder.

[0043] The first inclined surface 12 is used for sealing with the outer conical surface of the intake valve of the engine.

[0044] The second inclined surface 13 is used to cooperate with the limiting annular surface of the intake valve of the engine.

[0045] The engine is a device that converts the chemical energy of fuel into mechanical energy. Its core parts include cylinders, pistons, crankshafts and valve assemblies. Among them, the intake valve seat plays a vital role and can improve the efficiency and performance of the engine. The intake valve seat is a component installed on the cylinder head, which is responsible for sealing the connection between the intake valve and the cylinder body to ensure that the air and fuel mixture can effectively enter the cylinder. At the beginning of the engine's intake stroke, the engine's piston moves downward, and negative pressure is generated inside the cylinder. The intake valve opens at this time. During the opening of the intake valve, the intake valve seat ensures the close contact between the intake valve and the cylinder head, so that the cylinder and the intake duct are in a sealed state, and the required gas can be smoothly inhaled into the cylinder, preventing other gases or moisture from entering the cylinder through the gap between the intake valve and the cylinder head, ensuring the charging efficiency and quality. When the piston reaches the bottom dead center, the intake valve closes, and the intake valve seat ensures that the air and fuel mixture in the cylinder is well sealed. Then, the piston moves upward and begins to compress the gas. The spark plug ignites the gas to fully burn the fuel. During this process, if there is no intake valve seat or the intake valve seat fails, gas will easily leak from the gap between the intake valve and the cylinder head, affecting the pressure in the cylinder and the engine efficiency. And this process will be repeated during the operation of the engine. If there is no valve seat, the valve and the cylinder head will rub repeatedly when the valve is opened and closed, which is easy to cause the valve or cylinder head to wear and damage. Replacing the valve or replacing the cylinder head will incur high maintenance costs and is difficult to repair. Therefore, the intake valve seat directly affects the performance and operating stability of the engine.

[0046] The operation of the engine also requires accelerating the gas flow to improve combustion efficiency and power output. High-velocity gas flow can more fully mix the fuel and the gas in the cylinder, improving combustion efficiency. If the intake fluid velocity is not increased, it will lead to insufficient gas filling, resulting in insufficient intake volume, which in turn reduces the power of the engine. At the same time, incomplete combustion may lead to increased emissions of unburned gas and unstable engine operation, reduced fuel economy, excessive emissions, and increased engine temperature, affecting its overall performance and life.

[0047] In this embodiment, the seat ring body 1 of the intake valve seat ring is matched with the bottom hole of the cylinder head through interference, and the outer diameter of the baffle ring 2 is smaller than the outer diameter of the seat ring body 1, so that the baffle ring 2 and the baffle 3 can be avoided from being damaged when the seat ring body 1 is pressed into the bottom hole of the cylinder head. The baffle 3 is arranged on the inner ring of the baffle ring 2, and the inner diameter of the baffle ring 2 is the same as the inner diameter of the seat ring body 1, and is fixed to one end of the seat ring body 1 through the baffle 2. The circular hole surface 11, the first inclined surface 12 and the second inclined surface 13 of the seat ring body 1 are connected in sequence to form a throat for gas to enter the cylinder from the outside of the cylinder head. When the engine is running, the piston moves downward, the intake valve moves downward, and the intake valve separates from the seat ring body 1. The gas enters the cylinder through the baffle 3 in the baffle ring 2 and the circular hole surface 11, the first inclined surface 12 and the second inclined surface 13 of the inner ring of the seat ring body 1 in turn. When the gas passes through the baffle 3, part of the gas is blocked, the air flow speed and air flow form change, and the intake gas forms turbulence and quickly flows into the cylinder. After the gas forms turbulence through the baffle 2, the same inner diameter of the baffle ring 2 and the seat ring body 1 can maintain the flow form and high-speed flow of the gas. When the piston reaches the bottom, the intake valve contacts the first inclined surface 12 of the seat ring body 1, sealing the intake channel, so that a closed space is formed inside the cylinder, which is conducive to the piston compressing the gas, so that the fuel in the cylinder can burn instantly and generate maximum heat when ignited.

[0048] In this embodiment, the baffle on the intake valve seat ring can directly change the intake gas flow coefficient, so that when the piston moves downward to the bottom, sufficient gas is inhaled into the cylinder, and the high-speed flowing gas makes the engine's mixed gas more evenly mixed or the gas and fuel are mixed more evenly in the engine cylinder, thereby promoting the engine's combustion efficiency and improving the overall performance of the engine.

[0049] See also Figure 2 In an optional embodiment, the baffle 3 is a semicircular structure or a crescent-shaped structure, and the thickness of the baffle 3 is 1 mm.

[0050] In this embodiment, the baffle 3 in the intake valve seat ring should block part of the intake gas from forming a vortex. A crescent-shaped structure or a semicircular structure is used to meet the function of blocking part of the intake gas, and the crescent-shaped structure or the semicircular structure will not block the operation of the valve stem. While the engine is operating normally, the gas flow direction is changed to form a vortex, thereby improving the intake gas flow coefficient, making the gas mixing efficiency in the combustion chamber, and enhancing the combustion effect and power performance. The appropriate baffle thickness is crucial for the accurate assembly and function of the valve seat ring. Too large a thickness may cause poor flow or unsatisfactory vortex effect, and it will also make it difficult for the intake valve seat ring to change the overall temperature and be assembled into the bottom hole of the cylinder head. If the thickness is too small, the baffle may not be able to withstand the impact of the airflow, causing the baffle to break and fall into the cylinder, damaging the engine. Setting the thickness of the baffle to 1 mm can ensure the structural strength and fluid dynamics performance while avoiding excessive obstruction to the airflow.

[0051] In an optional embodiment, the inclination of the first inclined surface 12 is 45°, and the first inclined surface 12 is used for sealing cooperation with the outer conical surface of the intake valve of the engine.

[0052] The inclination of the working surface in the intake valve seat ring should be the same as the cone angle of the intake valve. The general intake valve cone angle is 45°. The inclination of the working surface of the intake valve seat is adapted to the valve cone angle to ensure close contact between the two.

[0053] In this embodiment, the first inclined surface 12 is a working surface with an inclination of 45°, and is used to seal with the outer conical surface of the intake valve of the engine. The first inclined surface 12 with an inclination of 45° can be matched with the 45° outer conical surface of the intake valve, and can also effectively increase the contact area, improve the sealing performance, reduce gas leakage, and ensure that the seal can buffer the mechanical impact of the valve during operation, thereby ensuring the efficiency and stability of the engine intake system.

[0054] In an optional embodiment, the inclination of the second inclined surface 13 is 30°, and the second inclined surface 13 is used to cooperate with the intake valve limiting annular surface of the engine.

[0055] In this embodiment, the second inclined surface 13 is used to cooperate with the intake valve limiting annular surface of the engine, and its inclination is set to 30°. The height of the intake valve in the seat ring body 1 can be limited by the second inclined surface with an inclination of 30° on the seat ring body 1. If the intake valve is too high or too low, the outer conical surface of the intake valve cannot be well contacted with the first inclined surface 12, so that the sealing effect is reduced. The 30° inclined surface of the second inclined surface can also optimize the opening and closing process of the intake valve, ensure the smooth operation of the intake valve, reduce friction and wear, and avoid the occurrence of jamming.

[0056] See also Figure 3 In an optional embodiment, one end of the seat ring body 1 is provided with an outer chamfer 14 for sealing with the cylinder head.

[0057] In order to ensure that the intake valve seat does not fall off during engine operation and that it is well combined with the bottom hole of the cylinder head for heat dissipation, the valve seat and the bottom hole of the cylinder head are interference fit. Usually, the intake valve seat is assembled into the bottom hole of the cylinder head by cold or hot mounting. When cold mounting is used, the interference fit is 0.04 to 0.12 mm, and when hot mounting is used, the interference fit is 0.20 to 0.25 mm.

[0058] In this embodiment, a combined outer chamfer 14 is provided at one end of the seat ring body 1 connected to the baffle ring 2 to achieve a seal with the cylinder head. The combined outer chamfer 14 can avoid the problem of a gap dead angle between the intake valve seat ring and the cylinder head during press-fitting, while improving the sealing performance, preventing gas leakage, and improving the overall efficiency and stability of the engine.

[0059] In an optional embodiment, the seat ring body 1, the baffle ring 2 and the baffle 3 are integrally cast. The seat ring body 1, the baffle ring 2 and the baffle 3 are made of alloy cast iron or austenitic steel.

[0060] The seat body 1, baffle ring 2 and baffle 3 of the intake valve seat need to withstand high-speed airflow, mechanical impact of the intake valve and high temperature generated by combustion in the cylinder. The alloy cast iron or austenitic steel has certain metal strength and heat resistance to ensure that the structural integrity can be maintained under extreme conditions. The intake valve seat also helps the heat conduction of the valve. The alloy cast iron or austenitic steel material can effectively transfer heat, thereby reducing the valve temperature, preventing overheating and extending the life.

[0061] It should be noted that the above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present application. Various modifications to these embodiments will be apparent to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intake valve seat ring, characterized in that: include: Seat ring body, baffle ring and baffle; The seat ring body is installed on the cylinder head of the engine, and the inner ring of the seat ring body is provided with a circular hole surface, a first inclined surface and a second inclined surface; The circular hole surface, the first inclined surface and the second inclined surface are connected in sequence; The baffle ring is arranged at one end of the seat ring body and connected to the circular hole surface; The baffle is arranged on the inner circle of the baffle ring, and the baffle is used to block part of the intake gas to increase the flow speed of the intake gas of the engine; The inner diameter of the baffle ring is the same as the inner diameter of the seat ring body, and the outer diameter of the baffle ring is smaller than the outer diameter of the seat ring body.

2. The intake valve seat ring according to claim 1, characterized in that: The baffle is a semicircular structure or a crescent-shaped structure.

3. The intake valve seat ring according to claim 1, characterized in that: The thickness of the baffle is 1 mm.

4. The intake valve seat ring according to claim 1, characterized in that: The inclination of the first inclined surface is 45°, and the first inclined surface is used for sealing with the outer conical surface of the intake valve of the engine.

5. The intake valve seat ring according to claim 1, characterized in that: The inclination of the second inclined surface is 30°, and the second inclined surface is used to cooperate with the intake valve limiting annular surface of the engine.

6. The intake valve seat ring according to claim 1, characterized in that: One end of the seat ring body is provided with an outer chamfer for sealing with the cylinder head.

7. The intake valve seat according to any one of claims 1 to 6, characterized in that: The seat ring body, the baffle ring and the baffle are cast in one piece.

8. The intake valve seat ring according to claim 7, characterized in that: The seat ring body, the baffle ring and the baffle are made of alloy cast iron or austenitic steel.

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