Cylinder cover assembly with valve seat ring dismounting groove structure and engine

Abstract

The utility model discloses a cylinder cover assembly with a valve seat ring dismounting groove structure and an engine, and relates to the technical field of engines. Comprising a cylinder cover body and a valve seat ring. The cylinder cover body is provided with an airflow channel, and a valve seat ring mounting position for mounting a valve seat ring is arranged in the airflow channel; a plurality of dismounting grooves are formed in the end, facing the cylinder cover body, in the valve seat ring mounting position in the circumferential direction, and one dismounting groove corresponds to the tail end, in the airflow main flow direction, of the airflow channel. The dismounting groove extends for a certain distance along the radial direction of the valve seat ring mounting position; the dismounting groove can contain the prying tool to stretch in so as to pry the edge of the valve seat ring, so that the valve seat ring is separated from the valve seat ring mounting position. The increase of turbulent flow loss at the sharp corner position when air flow passes through the valve seat ring is avoided, the flowing capacity of air flow is enhanced, flow separation is reduced, and the flowing continuity of the air flow in the air flow channel is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of engines, and particularly relates to a cylinder head assembly and an engine with a valve seat ring disassembly groove structure. Background Art

[0002] In an engine cylinder head, a valve seat ring installation hole, which is part of a gas flow passage, is usually formed on the side of the cylinder head facing the combustion chamber. The valve seat ring installation hole is used to install a valve seat ring. The valve can reciprocate in the gas flow passage. When the valve disengages from the valve seat ring, the combustion chamber intakes air. When the valve resets and abuts against the valve seat ring, the gas flow passage is closed.

[0003] Due to the mutual abutment and collision between the valve head and the valve seat ring during long-term use, and the continuous improvement of the engine thermal efficiency and the combustion heat load, the valve seat ring is prone to wear to varying degrees. If not replaced in time, the sealing performance between the valve seat ring and the valve is likely to decrease. In severe cases, air leakage is likely to occur, resulting in a decrease in the operating power of the engine, causing uneven wear of the valve. In severe cases, the valve may even break. Therefore, the valve seat ring needs to be replaced in time. However, during the replacement process, since the bottom wall of the valve seat ring installation hole completely blocks the bottom surface of the valve seat ring, it is not easy to disassemble. Therefore, in the prior art, the circumferential side of the gas flow passage of the cylinder head is usually cut in a circle to form an annular groove with the valve seat ring. Although it meets the requirement of prying and disassembling, its structure will cause sharp corners between the inner circumference of the gas flow passage and the valve seat ring. When the air flow passes through the sharp corners, it will be shunted, resulting in partial blockage of the air flow, causing turbulent flow loss of the air flow, reducing the continuous flow performance of the gas flow passage, and reducing the flow capacity of the air flow, thus affecting the operating efficiency of the engine. Summary of the Utility Model

[0004] The utility model provides a cylinder head assembly and an engine with a valve seat ring disassembly groove structure to solve the problem that the existing annular groove causes poor air flow and air flow disturbance, resulting in a decrease in the flow capacity of the gas flow passage. It is necessary to design a cylinder head assembly that can not only meet the requirement of prying and disassembling the valve seat ring but also ensure the gas flow performance and reduce the turbulent flow loss.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A cylinder head assembly with a valve seat removal groove structure includes a cylinder head body and a valve seat. The cylinder head body has an air flow passage, and there is a valve seat installation position for installing the valve seat in the air flow passage. At one end of the valve seat installation position facing the cylinder head body, a plurality of removal grooves are circumferentially formed in part, and one of the removal grooves corresponds to the end of the air flow main direction of the air flow passage. The removal groove extends a certain distance in the radial direction of the valve seat installation position. The removal groove can accommodate a pry tool to extend in and pry the edge of the valve seat, so that the valve seat is separated from the valve seat installation position.

[0007] A cylinder head assembly with a valve seat removal groove structure of the present invention also has the following additional technical features:

[0008] An opening communicating with the air flow passage is formed at one end of the cylinder head body facing the combustion chamber. The inner diameter of the opening is larger than that of the air flow passage so as to form an installation groove between the opening and the air flow passage. The installation groove can form the valve seat installation position for installing the valve seat. The bottom wall of the installation groove can abut against the end face of the valve seat, and the peripheral wall of the installation groove can abut against the peripheral surface of the valve seat.

[0009] The removal groove is formed in the bottom wall of the installation groove in the circumferential direction. The removal groove forms a gap between the bottom of the valve seat and the bottom wall of the installation groove, so that a pry tool can extend into the removal groove and pry the valve seat upward from the bottom of the valve seat.

[0010] There are three removal grooves, the first one is the first removal groove, the second one is the second removal groove, and the third one is the third removal groove. The first removal groove, the second removal groove and the third removal groove are arranged at equal intervals in the circumferential direction of the bottom wall of the installation groove; or, the first removal groove, the second removal groove and the third removal groove are arranged at unequal intervals in the circumferential direction of the bottom wall of the installation groove.

[0011] The first removal groove, the second removal groove and the third removal groove are distributed at equal intervals of 100° to 120°.

[0012] The first removal groove, the second removal groove and the third removal groove are in a straight groove structure; or the first removal groove, the second removal groove and the third removal groove are in a circular groove structure.

[0013] The included angle between the first straight line connecting the midpoint of the second removal groove and the center of the opening and the tangent line of the air flow main direction of the air flow passage passing through the center of the opening ranges from 50° to 70°.

[0014] The included angle between the second straight line formed by connecting the midpoint of the third disassembly groove and the center of the opening and the tangent line of the mainstream air flow direction passing through the center of the opening of the air flow channel ranges from 50° to 70°.

[0015] A valve structure that moves along the air flow channel is provided in the air flow channel. One end of the valve structure facing the valve seat ring hole has a valve head, and the valve head can form a closed or open state with the valve seat ring under the action of the movement of the valve structure.

[0016] This application also relates to an engine, including a body group, and the body group includes a cylinder head assembly with a valve seat ring disassembly groove structure according to any one of the above.

[0017] Due to the adoption of the above technical solutions, the beneficial effects obtained by the present utility model are:

[0018] 1. A cylinder head assembly with a valve seat ring disassembly groove structure, including a cylinder head body and a valve seat ring; the cylinder head body has an air flow channel, and a valve seat ring installation position for installing the valve seat ring is provided in the air flow channel; a plurality of disassembly grooves are circumferentially and partially opened at one end of the valve seat ring installation position facing the cylinder head body, and one of the disassembly grooves corresponds to the end of the mainstream air flow direction of the air flow channel; the disassembly groove extends a certain distance in the radial direction of the valve seat ring installation position; the disassembly groove can accommodate a pry tool to extend in and pry the edge of the valve seat ring, so that the valve seat ring is separated from the valve seat ring installation position.

[0019] The valve seat ring is installed in the valve seat ring installation position of the cylinder head body. A disassembly groove is circumferentially opened in the valve seat ring installation position, so that a certain space is formed between the valve seat ring and the valve seat ring installation position of the cylinder head body. This space is convenient for a pry tool to extend in and pry the bottom of the valve seat ring, so as to separate the valve seat ring from the cylinder head, enabling the valve seat ring to be replaced in time; avoiding problems such as the reduction of the sealing performance between the valve seat ring and the valve due to the failure to replace the valve seat ring in time after wear, air leakage, and the occurrence of problems such as eccentric wear and fracture of the valve; and because the disassembly groove is circumferentially opened in a part of the interior of the valve seat ring installation position, the disassembly groove is not arranged along the entire circumference and does not penetrate the entire valve seat ring installation position in the radial direction, but only extends a certain distance in the radial direction of the valve seat ring installation position, so that the disassembly groove is hidden between the bottom of the valve seat ring and the bottom wall of the valve seat ring installation position, without sharp corners, realizing a smooth transition between the inner wall of the air flow channel and the valve seat ring, thereby avoiding the formation of sharp corners between the circumferential side of the air flow channel and the valve seat ring due to the ring groove, thus avoiding the increase of turbulent flow loss at the sharp corner position when the air flow passes through the valve seat ring, strengthening the flow capacity of the gas flow, reducing the flow separation, ensuring the continuity of the air flow in the air flow channel, and improving the operating efficiency of the engine.

[0020] 2. As a preferred embodiment of the present utility model, an opening communicating with the air flow passage is provided at one end of the cylinder head body facing the combustion chamber; the inner diameter of the opening is larger than that of the air flow passage so as to form a mounting groove between the opening and the air flow passage; the mounting groove can form a valve seat ring mounting position for mounting the valve seat ring; the bottom wall of the mounting groove can abut against the end face of the valve seat ring, and the peripheral wall of the mounting groove can abut against the peripheral surface of the valve seat ring.

[0021] The purpose of the opening on the side of the air flow passage facing the combustion chamber is to enable the end of the air flow passage to form a mounting groove for mounting the valve seat ring, and this mounting groove serves as the valve seat ring mounting position for mounting the valve seat ring. The bottom wall of the mounting groove is used for abutting and connecting with the bottom wall of the valve seat ring, and the side wall of the mounting groove is used for abutting and connecting with the side wall of the valve seat ring. Therefore, the valve seat ring can be abutted and connected within the mounting groove, realizing the connection between the valve seat ring and the cylinder head body.

[0022] 3. As a preferred embodiment of the present utility model, a disassembly groove is provided along the circumferential direction on the bottom wall of the mounting groove. The disassembly groove forms a gap between the bottom of the valve seat ring and the bottom wall of the mounting groove, enabling a pry tool to extend into the disassembly groove and pry the valve seat ring upward from the bottom of the valve seat ring.

[0023] The valve seat ring can be abutted and connected within the mounting groove. To avoid the valve seat ring being in a completely abutted state with the mounting groove without any prying and disassembling space, which is inconvenient for disassembly, therefore, in order to extend the pry tool into the bottom of the valve seat ring to pry the valve seat ring upward from the bottom, the present application adopts a disassembly groove provided on the bottom wall of the mounting groove. Also, to avoid the increase in turbulent flow loss caused by traditional open-loop grooves, the present application adopts a disassembly groove provided in a partial area along the circumferential direction on the bottom wall of the mounting groove. Therefore, a ring groove will not be formed between the air flow passage and the valve seat ring, that is, the circumferential side of the end of the valve seat ring facing the cylinder head body and the air flow passage will not be completely in a gap state. The disassembly groove of the present application is opened along the radial direction of the mounting groove for a certain distance. That is to say, the disassembly groove of the present application is provided on the bottom wall of the mounting groove and does not penetrate the bottom wall of the mounting groove, being hidden between the bottom wall of the mounting groove and the bottom wall of the valve seat ring. Therefore, there will be no sharp corner area caused by the ring groove in the air flow passage, but a smooth transition is formed between the air flow passage and the valve seat ring. There is only a partial disassembly groove between the bottom wall of the valve seat ring and the bottom wall of the mounting groove. Therefore, it can be realized that not only can the pry tool extend into this disassembly groove to pry the bottom of the valve seat ring upward, but also the air flow can flow smoothly in the air flow passage, reducing the turbulent flow loss, improving the gas flow performance, and thus improving the engine operation efficiency.

[0024] 4. As a preferred embodiment of the present utility model, there are three disassembly grooves. The first one is the first disassembly groove, the second one is the second disassembly groove, and the third one is the third disassembly groove. The first disassembly groove, the second disassembly groove, and the third disassembly groove are arranged at equal intervals along the circumferential direction of the bottom wall of the installation groove; alternatively, the first disassembly groove, the second disassembly groove, and the third disassembly groove are arranged at unequal intervals along the circumferential direction of the bottom wall of the installation groove.

[0025] By setting the first disassembly groove, the second disassembly groove, and the third disassembly groove to be arranged at equal or unequal intervals along the circumferential direction, it is possible to pry the valve seat ring at multiple positions in the air flow channel, increasing the probability of prying and removing the valve seat ring, facilitating the removal of the valve seat ring from the cylinder head, avoiding excessive wear on one side of the cylinder head caused by prying the valve seat ring from one side, and thus improving the service life of the entire cylinder head assembly.

[0026] 5. As a preferred embodiment of the present utility model, the first disassembly groove, the second disassembly groove, and the third disassembly groove are equally spaced at 100° - 120°.

[0027] When it is necessary to set the first disassembly groove, the second disassembly groove, and the third disassembly groove at equal intervals, in order to achieve uniform force on the valve seat ring, so that multiple disassembly grooves can be distributed in the entire area at the bottom of the valve seat ring, and it is convenient for the prying tool to find the disassembly groove for disassembly, the interval angle between the first disassembly groove, the second disassembly groove, and the third disassembly groove is set to 100° - 120°. Description of the Drawings

[0028] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0029] Figure 1 It is a schematic structural diagram of an existing cylinder head with a ring groove opened;

[0030] Figure 2 It is a structural diagram of the disassembly groove of a cylinder head assembly with a valve seat ring disassembly groove structure under an embodiment of the present application;

[0031] Figure 3 It is a schematic diagram of the air flow in the annular groove opened in the cylinder head body;

[0032] Figure 4 It is a schematic diagram of the air flow when the annular groove is not opened in the cylinder head body;

[0033] Figure 5Comparison diagram of the blowing effect in the air flow channel with the first disassembly groove, the second disassembly groove and the third disassembly groove and the blowing effect in the air flow channel with the ring groove for this application;

[0034] In the figure,

[0035] 1. First disassembly groove; 2. Second disassembly groove; 3. Third disassembly groove; 4. Main air flow direction; 5. Cylinder head body; 6. Valve seat ring; 7. Flow coefficient curve of the disassembly groove; 8. Flow coefficient curve of the ring groove;

[0036] θ1 is the included angle between the first straight line and the tangent line of the main air flow direction passing through the opening center of the air flow channel;

[0037] θ2 is the included angle between the second straight line and the tangent line of the main air flow direction passing through the opening center of the air flow channel. Detailed implementation mode

[0038] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present utility model is not limited by the specific embodiments disclosed below.

[0039] In addition, in the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0040] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "embodiment", "example", "an embodiment", "example" or "specific example" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expression of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0042] For a clearer explanation of the overall concept of the present utility model, the following will be described in detail by way of examples in conjunction with the drawings of the specification. In order to ensure that the gas flow channel has good sealing performance, since there is an interference fit between the valve seat ring 6 and the mounting hole of the valve seat ring 6, during installation, the valve seat ring 6 is cooled by liquid nitrogen during installation so that the valve seat ring 6 shrinks and then is press-fitted into the mounting hole of the valve seat ring 6. When the valve seat ring 6 returns to room temperature, it expands, thereby enabling an interference fit between the valve seat ring 6 and the mounting hole of the valve seat ring 6. As Figure 1 shown, in the existing cylinder head, a ring groove is provided. A ring groove is circumferentially provided around the cylinder head below the mounting bottom surface of the valve seat ring 6, and the ring groove penetrates through the cylinder head. This will result in a sharp corner between the inner circumference of the gas flow channel and the valve seat ring. When the air flow passes through the sharp corner, it will cause flow splitting, resulting in partial blockage of the air flow, causing turbulent flow loss of the air flow, reducing the continuous flow performance of the air flow in the gas flow channel, reducing the flow capacity of the air flow, and thus affecting the operating efficiency of the engine; while the present application can avoid the above problems. Only a part of the disassembly groove is circumferentially provided on the cylinder head body 5 below the mounting bottom surface of the valve seat ring 6, and the disassembly groove does not penetrate through the cylinder head body 5. It is hiddenly provided between the valve seat ring 6 and the cylinder head body 5, and will not affect the air flow from being disturbed, improving the continuous flow performance of the air flow.

[0043] The present utility model relates to a cylinder head assembly having a valve seat ring disassembly groove structure, as Figures 2 - 5 shown, including a cylinder head body 5 and a valve seat ring 6; the cylinder head body 5 has an air flow channel, and there is a valve seat ring mounting position for mounting the valve seat ring 6 in the air flow channel; a plurality of disassembly grooves are circumferentially provided at one end of the valve seat ring mounting position facing the cylinder head body 5, and one of the disassembly grooves corresponds to the end of the air flow main direction 4 of the air flow channel; the disassembly groove extends a certain distance along the radial direction of the valve seat ring mounting position; the disassembly groove can accommodate a pry tool to extend in to pry the edge of the valve seat ring 6 so that the valve seat ring 6 is disengaged from the valve seat ring mounting position.

[0044] The valve seat ring 6 is installed in the valve seat ring installation position of the cylinder head body 5. A disassembly groove is circumferentially formed in the inner circumference of the valve seat ring installation position, so that a certain space is formed between the valve seat ring 6 and the valve seat ring installation position of the cylinder head body 5. This space facilitates the insertion of a prying tool to pry the bottom of the valve seat ring 6, thereby separating the valve seat ring 6 from the cylinder head body 5, enabling the valve seat ring 6 to be replaced in a timely manner; avoiding problems such as the reduction of the sealing performance between the valve seat ring 6 and the valve due to the failure to replace the worn valve seat ring 6 in a timely manner, air leakage, and uneven wear of the valve leading to fracture; and since multiple disassembly grooves are formed in the circumferential part inside the valve seat ring installation position, the disassembly grooves are not arranged along the entire circumference, and do not penetrate the entire valve seat ring installation position in the radial direction, but only extend a certain distance in the radial direction of the valve seat ring installation position, so that the disassembly grooves are hidden between the bottom of the valve seat ring 6 and the bottom wall of the valve seat ring installation position, without sharp corners, realizing a smooth transition between the inner wall of the air flow channel and the valve seat ring 6, thereby avoiding the formation of sharp corners between the circumferential side of the air flow channel and the valve seat ring 6 due to the ring groove, thus avoiding the increase of turbulent flow loss at the sharp corner position when the air flow passes through the valve seat ring 6, strengthening the flow capacity of the gas flow, reducing the flow separation, ensuring the continuity of the air flow in the air flow channel, and improving the operating efficiency of the engine.

[0045] As a preferred embodiment, an opening communicating with the air flow channel is formed at one end of the cylinder head body 5 facing the combustion chamber; the inner diameter of the opening is larger than the inner diameter of the air flow channel so as to form an installation groove between the opening and the air flow channel; the installation groove can form a valve seat ring installation position for installing the valve seat ring 6; the bottom wall of the installation groove can abut against the end face of the valve seat ring 6, and the circumferential wall of the installation groove can abut against the circumferential surface of the valve seat ring 6.

[0046] The purpose of opening the hole on the side of the air flow channel facing the combustion chamber is to enable the end of the air flow channel to form an installation groove for installing the valve seat ring 6, and this installation groove serves as the valve seat ring installation position for installing the valve seat ring 6. The bottom wall of the installation groove is used for abutting and connecting with the bottom wall of the valve seat ring 6, and the side wall of the installation groove is used for abutting and connecting with the side wall of the valve seat ring 6. Therefore, the valve seat ring 6 can be abutted and connected in the installation groove, realizing the connection between the valve seat ring 6 and the cylinder head body 5.

[0047] As a preferred embodiment, a disassembly groove is circumferentially formed on the bottom wall of the installation groove. The disassembly groove forms a gap between the bottom of the valve seat ring 6 and the bottom wall of the installation groove, enabling a prying tool to extend into the disassembly groove and pry the valve seat ring 6 upward from the bottom of the valve seat ring 6.

[0048] The valve seat ring 6 can be abutted and connected in the installation groove. In order to prevent the valve seat ring 6 from being in a completely abutted state with the installation groove, leaving no space for prying and disassembling, which is inconvenient for disassembly. Therefore, in order to insert a prying tool into the bottom of the valve seat ring 6 to pry the valve seat ring 6 upward from the bottom, this application adopts a disassembly groove opened on the bottom wall of the installation groove. Also, in order to avoid the increase in turbulent flow loss caused by the traditional open-loop groove, this application adopts a disassembly groove opened in a partial area along the circumferential direction of the bottom wall of the installation groove. So, no ring groove will be formed between the air flow channel and the valve seat ring 6, that is, the circumferential side of one end of the valve seat ring 6 facing the cylinder head body 5 and the air flow channel will not be completely in a gap state. The disassembly groove of this application is opened along the radial direction of the installation groove for a certain distance. That is to say, the disassembly groove of this application is arranged on the bottom wall of the installation groove and does not penetrate the bottom wall of the installation groove, hidden between the bottom wall of the installation groove and the bottom wall of the valve seat ring 6. Therefore, there will be no sharp corner area brought by the ring groove in the air flow channel, but a smooth transition is formed between the air flow channel and the valve seat ring 6. There is only a partial disassembly groove between the bottom wall of the valve seat ring 6 and the bottom wall of the installation groove. Therefore, it can be realized that the prying tool can be inserted into this disassembly groove to pry the bottom of the valve seat ring 6 upward, and at the same time, it can also realize the smooth flow of air in the air flow channel, reduce the turbulent flow loss, improve the gas flow performance, and thus improve the engine operation efficiency.

[0049] Furthermore, there are three disassembly grooves. The first one is the first disassembly groove, the second one is the second disassembly groove, and the third one is the third disassembly groove; the first disassembly groove 1, the second disassembly groove 2 and the third disassembly groove 3 are arranged at equal intervals along the circumferential direction of the bottom wall of the installation groove; or, the first disassembly groove 1, the second disassembly groove 2 and the third disassembly groove 3 are arranged at unequal intervals along the circumferential direction of the bottom wall of the installation groove.

[0050] By setting the first disassembly groove 1, the second disassembly groove 2 and the third disassembly groove 3 to be arranged at equal or unequal intervals along the circumference, it can be realized that the valve seat ring 6 can be pried at multiple positions in the air flow channel respectively, increasing the probability of prying and disassembling the valve seat ring 6, facilitating the disassembly of the valve seat ring 6 from the cylinder head body 5, and avoiding excessive wear on one side of the cylinder head body 5 caused by prying the valve seat ring 6 from one side, thereby improving the service life of the entire cylinder head assembly.

[0051] It should be noted that the first disassembly groove 1 corresponds to the end of the main air flow direction 4 of the air flow channel.

[0052] The air flow velocity is inversely proportional to the turning radius. Therefore, the lower boundary of the air flow channel is a high-velocity region and is also a region prone to flow separation. The traditional ring groove will disrupt the continuity of the flow field in the air flow channel, thereby strengthening the flow separation, increasing the turbulent flow loss, and reducing the flow performance of the air flow in the air flow channel. By arranging the card slots in the form of three claws and restricting the positions of the card slots, the detachable property of the seat ring can be satisfied while ensuring the flow capacity of the air passage.

[0053] Further, the first disassembly groove 1, the second disassembly groove 2, and the third disassembly groove 3 are equally spaced at 100° - 120°.

[0054] When it is necessary to equally space the first disassembly groove 1, the second disassembly groove 2, and the third disassembly groove 3, in order to achieve uniform stress on the valve seat ring 6, so that multiple disassembly grooves can be distributed over the entire bottom area of the valve seat ring 6, and it is convenient for the prying tool to find the disassembly grooves for disassembly, the interval angle between the first disassembly groove 1, the second disassembly groove 2, and the third disassembly groove 3 is set to 100° - 120°.

[0055] Further, the first disassembly groove 1, the second disassembly groove 2, and the third disassembly groove 3 are in a straight groove structure; or the first disassembly groove 1, the second disassembly groove 2, and the third disassembly groove 3 are in a circular groove structure.

[0056] When the first disassembly groove 1, the second disassembly groove 2, and the third disassembly groove 3 adopt a straight groove structure, the cross-sectional area of the straight groove is in a rectangular structure; when the first disassembly groove 1, the second disassembly groove 2, and the third disassembly groove 3 adopt a circular groove structure, the cross-section of the circular groove is in a circular structure.

[0057] In order to achieve a good distribution of the disassembly grooves, preferably, the included angle θ1 between the first straight line formed by connecting the midpoint of the second disassembly groove 2 and the center of the opening and the tangent line of the air flow main direction 4 passing through the center of the opening of the air flow channel ranges from 50° to 70°. More preferably, the included angle θ2 between the second straight line formed by connecting the midpoint of the third disassembly groove 3 and the center of the opening and the tangent line of the air flow main direction 4 passing through the center of the opening of the air flow channel ranges from 50° to 70°.

[0058] The first disassembly groove 1, the second disassembly groove 2, and the third disassembly groove 3 of the present application are distributed circumferentially along the air flow channel, realizing the arrangement form of a three-claw card slot. By adopting the arrangement form of a three-claw card slot, the positions of the first disassembly groove 1, the second disassembly groove 2, and the third disassembly groove 3 are restricted, which not only satisfies the detachable property of the valve seat ring 6 but also ensures the flow performance of the air flow in the air flow channel.

[0059] Such as Figure 5As shown in the figure, the abscissa in the figure represents the valve stroke L, and the ordinate represents the flow coefficient KV. By comparing the flow coefficient curve 7 of the disassembly groove and the flow coefficient curve 8 of the ring groove in the figure, it is found that the flow coefficient of the disassembly groove is higher than that of the traditional ring groove. The fluid flows more smoothly in the pipeline or equipment provided with the disassembly groove, which is beneficial to improving the operation efficiency, reducing the energy consumption and reducing the material loss.

[0060] As a preferred embodiment, the air flow passage has a valve structure that moves along the air flow passage. One end of the valve structure facing the hole of the valve seat ring 6 has a valve head, and the valve head can form a closed or open state with the valve seat ring 6 under the action of the movement of the valve structure.

[0061] The present application also relates to an engine, including a body group, and the body group includes the above-mentioned cylinder head assembly having a valve seat ring disassembly groove structure.

[0062] What is not described in the present utility model can be realized by adopting or referring to the existing technology.

[0063] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the key point of each embodiment is to illustrate the differences from other embodiments.

[0064] The above are only the embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.

Claims

1. A cylinder head assembly with a valve seat ring disassembly groove structure, characterized in that, It includes a cylinder head body (5) and a valve seat ring (6); the cylinder head body (5) has an air flow channel, and there is a valve seat ring installation position for installing the valve seat ring (6) in the air flow channel; at one end of the valve seat ring installation position facing the cylinder head body (5), a plurality of disassembly grooves are circumferentially formed in part, and one of the disassembly grooves corresponds to the end of the air flow main direction of the air flow channel; the disassembly groove extends a certain distance in the radial direction of the valve seat ring installation position; the disassembly groove can accommodate a pry tool to extend into and pry the edge of the valve seat ring (6) so that the valve seat ring (6) can be disengaged from the valve seat ring installation position.

2. The cylinder head assembly with a valve seat ring disassembly groove structure according to claim 1, characterized in that, An opening communicating with the air flow channel is formed at one end of the cylinder head body (5) facing the combustion chamber; the inner diameter of the opening is larger than the inner diameter of the air flow channel so as to form an installation groove between the opening and the air flow channel; the installation groove can form the valve seat ring installation position for installing the valve seat ring (6); the bottom wall of the installation groove can abut against the end face of the valve seat ring (6), and the peripheral wall of the installation groove can abut against the peripheral surface of the valve seat ring (6).

3. The cylinder head assembly with a valve seat ring disassembly groove structure according to claim 2, characterized in that, The disassembly groove is formed in the bottom wall of the installation groove in the circumferential direction, and the disassembly groove forms a gap between the bottom of the valve seat ring (6) and the bottom wall of the installation groove, so that a pry tool can extend into the disassembly groove and pry the valve seat ring (6) upward from the bottom of the valve seat ring (6).

4. The cylinder head assembly with a valve seat ring disassembly groove structure according to claim 2, characterized in that, There are three disassembly grooves, the first one is the first disassembly groove (1), the second one is the second disassembly groove (2), and the third one is the third disassembly groove (3); The first disassembly groove (1), the second disassembly groove (2) and the third disassembly groove (3) are arranged at equal intervals in the circumferential direction of the bottom wall of the installation groove; alternatively, the first disassembly groove (1), the second disassembly groove (2) and the third disassembly groove (3) are arranged at unequal intervals in the circumferential direction of the bottom wall of the installation groove.

5. The cylinder head assembly with a valve seat ring disassembly groove structure according to claim 4, characterized in that, The first disassembly groove (1), the second disassembly groove (2) and the third disassembly groove (3) are distributed at equal intervals of 100° to 120°.

6. The cylinder head assembly with a valve seat ring disassembly groove structure according to claim 4, characterized in that, The first disassembly groove (1), the second disassembly groove (2) and the third disassembly groove (3) are in a straight groove structure; or the first disassembly groove (1), the second disassembly groove (2) and the third disassembly groove (3) are in a circular groove structure.

7. The cylinder head assembly with a valve seat ring dismounting groove structure according to claim 4, characterized in that, The included angle between the first straight line formed by connecting the midpoint of the second disassembly groove (2) and the center of the opening and the tangent of the air flow main direction (4) of the air flow channel passing through the center of the opening ranges from 50° to 70°.

8. The cylinder head assembly with a valve seat ring disassembly groove structure according to claim 4, characterized in that, The included angle between the second straight line formed by connecting the midpoint of the third disassembly groove (3) and the center of the opening and the tangent of the air flow main direction (4) of the air flow channel passing through the center of the opening ranges from 50° to 70°.

9. The cylinder head assembly with a valve seat ring disassembly groove structure according to claim 8, characterized in that, There is a valve structure moving along the air flow channel in the air flow channel, and one end of the hole of the valve structure facing the valve seat ring (6) has a valve head, and the valve head can form a closed or open state with the valve seat ring (6) under the movement of the valve structure.

10. An engine, characterized in that, It includes an engine block group, and the engine block group includes a cylinder head assembly having a valve seat ring dismounting groove structure according to any one of claims 1-9.

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