Engine cylinder head that enhances valve cooling

Abstract

This utility model discloses an engine cylinder head that enhances valve cooling, relating to the field of engine cylinder head technology. It includes a cylinder head body, several combustion chambers, and several sets of intake and exhaust valve stems. Vertical grooves and connecting grooves are formed on the cylinder head body located at the top of the combustion chambers. Water inlets and heat dissipation components are installed within the vertical grooves. In this utility model, the vertical grooves and connecting grooves on the cylinder head body located at the top of the combustion chambers allow external cooling water to enter the top and bottom water inlets during operation. Cooling water is discharged through the outlet holes and moves upwards through flow channels. Because several fins are fixed inside the annular heat-conducting plate, the heat from the valves is transferred to the annular heat-conducting plate and conducted through the fins. The fins increase the heat exchange area and improve heat exchange efficiency. The water after heat exchange is discharged through the drain holes, thus solving the technical problem of reduced strength of the valve section due to increased temperature.

Description

Technical Field

[0001] This utility model relates to the field of engine cylinder head technology, specifically to an engine cylinder head that can enhance valve cooling. Background Technology

[0002] The cylinder head is one of the main components of an engine. Its primary function is to seal the upper part of the cylinder and, together with the piston top and cylinder, form the combustion chamber. The cylinder head houses the intake and exhaust valves, each with a valve stem. During engine operation, the valve stems control the opening and closing of the intake and exhaust valves, allowing fresh air or combustion gases to be drawn in through the intake valves and exhaust gases to be expelled through the exhaust valves.

[0003] When the engine is running, the intake valve and exhaust valve are in direct contact with the high-temperature combustion gas. The valve section temperature rises rapidly and is relatively high. As the temperature rises, the strength of the valve section will decrease. The existing technology has poor cooling design for the valve section of the cylinder head, which cannot effectively solve the technical problem of the valve section strength reduction caused by the temperature rise. Summary of the Invention

[0004] The purpose of this invention is to provide an engine cylinder head that enhances valve cooling, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an engine cylinder head that enhances valve cooling, comprising a cylinder head body, several combustion chambers, and several sets of intake valve stems and exhaust valve stems. A vertical groove and a connecting groove are provided on the cylinder head body located at the top of the combustion chambers. A water inlet and a heat dissipation component are provided in the vertical groove. The water inlet is located inside the heat dissipation component, and the outer side of the heat dissipation component is in contact with the groove wall of the vertical groove.

[0006] Preferably, the water inlet includes a top water inlet pipe, the bottom of which is fixedly connected to a bottom water inlet pipe, the bottom water inlet pipe is located in a connecting groove, and the bottom water inlet pipe has several water outlet holes.

[0007] Preferably, a vacuum chamber is provided on the top water inlet pipe body, and the vacuum chamber is in a vacuum state.

[0008] Preferably, the heat dissipation component includes a top connecting plate and an annular heat-conducting plate. Several fins are fixed on the inner side of the annular heat-conducting plate, and a flow groove is formed between two adjacent fins. Several drainage holes communicating with the flow groove are opened on the plate body of the top connecting plate. The inner side of the fin is in contact with the outer side of the top water inlet pipe.

[0009] Preferably, the ratio of the inner diameter of the bottom water inlet pipe to the inner diameter of the top water inlet pipe is (0.3-0.7):1.

[0010] Preferably, an extended annular plate is fixed to the top of the vertical groove, and the top surface of the extended annular plate is at the same horizontal plane as the top surface of the top water inlet pipe.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This engine cylinder head, which enhances valve cooling, has vertical grooves and connecting grooves on the cylinder head body located at the top of the combustion chamber. During operation, external cooling water enters the top and bottom water inlet pipes, and the coolant is discharged through the outlet hole. The cooling water moves upward through the flow channel. Because several fins are fixed inside the annular heat-conducting plate, the heat from the valve is transferred to the annular heat-conducting plate and conducted through the fins. The fins increase the heat exchange area and improve the heat exchange efficiency. The water after heat exchange is discharged through the drain hole, thus solving the technical problem of reduced strength of the valve due to increased temperature. Attached Figure Description

[0012] Figure 1 This is the left-side axial view of the present invention; Figure 2 This is a bottom view of the present invention; Figure 3 This is a half-sectional view of the present invention; Figure 4 This is a detailed drawing of the heat sink component of this utility model.

[0013] In the diagram: 1. Cylinder head body; 101. Intake valve stem; 102. Exhaust valve stem; 103. Combustion chamber; 401. Vertical groove; 402. Connecting groove; 5. Top water inlet pipe; 501. Bottom water inlet pipe; 502. Vacuum chamber; 503. Water outlet; 6. Radiator; 601. Annular heat conduction plate; 602. Top connecting plate; 603. Fin; 604. Flow groove; 605. Drain hole; 7. Extended annular plate. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] like Figures 1-4As shown, this utility model provides a technical solution: an engine cylinder head that can enhance valve cooling, including a cylinder head body 1, several combustion chambers 103, and several sets of intake valve stems 101 and exhaust valve stems 102. Each combustion chamber 103 corresponds to a set of intake valve stems 101 and exhaust valve stems 102. A vertical groove 401 and a connecting groove 402 are provided on the cylinder head body 1 located at the top of the combustion chamber 103. The diameter of the connecting groove 402 is smaller than the diameter of the vertical groove 401. A water inlet and a heat dissipation component 6 are provided in the vertical groove 401. In addition, an extended annular plate 7 is fixed or integrally formed at the top of the vertical groove 401, and the top surface of the extended annular plate 7 is on the same horizontal plane as the top surface of the top water inlet pipe 5.

[0016] like Figure 3 As shown, the water inlet includes a top water inlet pipe 5, and a bottom water inlet pipe 501 is fixedly connected to the bottom of the top water inlet pipe 5. In order to make the water flow fast at first and then slow down, thereby improving the heat exchange efficiency, the ratio of the inner diameter of the bottom water inlet pipe 501 to the inner diameter of the top water inlet pipe 5 is 0.3-0.7:1. Preferably, the ratio of the inner diameter of the bottom water inlet pipe 501 to the inner diameter of the top water inlet pipe 5 is 0.5:1. It is known that the bottom water inlet pipe 501 is located in the connecting groove 402, and a gap is formed between the bottom water inlet pipe 501 and the connecting groove 402. Several outlet holes 503 arranged in a ring array are opened on the pipe body of the bottom water inlet pipe 501.

[0017] The water inlet is located inside the heat sink 6, and the outer side of the heat sink 6 is in contact with the wall of the vertical groove 401. Through the above arrangement, the flow speed of cooling water on the outer side of the heat sink 6 is slowed down, thereby improving the heat exchange efficiency.

[0018] To reduce heat loss, in this design, the outside of the top water inlet pipe 5 is coated with heat-insulating paint, and a vacuum chamber 502 is also provided on the pipe body of the top water inlet pipe 5. During the production of the top water inlet pipe 5, the vacuum chamber 502 is evacuated to a vacuum state.

[0019] like Figure 3 and Figure 4 As shown, the heat sink 6 includes a top connecting plate 602 and an annular heat-conducting plate 601 fixed on its top. To improve heat exchange efficiency, several fins 603 are fixed on the inner side of the annular heat-conducting plate 601, thereby increasing the heat exchange area. A flow groove 604 is formed between two adjacent fins 603. Several drainage holes 605 connected to the flow grooves 604 are opened on the plate body of the top connecting plate 602. To improve heat exchange efficiency, the inner side of the fins 603 is in contact with the outer side of the top water inlet pipe 5.

[0020] Specifically, during operation, external cooling water enters the top inlet pipe 5 and the bottom inlet pipe 501, and the coolant is discharged through the outlet hole 503. The cooling water moves upward through the flow channel 604. Since several fins 603 are fixed inside the annular heat-conducting plate 601, the heat from the valve is transferred to the annular heat-conducting plate 601 and conducted through the fins 603. The setting of the fins 603 increases the heat exchange area and improves the heat exchange efficiency. The water after heat exchange is discharged through the drain hole 605.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. An engine cylinder head capable of enhancing valve cooling, comprising a cylinder head body (1), a plurality of combustion chambers (103), and a plurality of intake valve stems (101) and exhaust valve stems (102), characterized in that: A vertical groove (401) and a connecting groove (402) are provided on the cylinder head body (1) located at the top of the combustion chamber (103). A water inlet and a heat dissipation component (6) are provided in the vertical groove (401). The water inlet is located in the heat dissipation component (6), and the outer side of the heat dissipation component (6) is in contact with the groove wall of the vertical groove (401).

2. The engine cylinder head with enhanced valve cooling according to claim 1, characterized in that: The water inlet includes a top water inlet pipe (5), the bottom of which is fixedly connected to a bottom water inlet pipe (501). The bottom water inlet pipe (501) is located in a connecting groove (402), and several water outlet holes (503) are opened on the pipe body of the bottom water inlet pipe (501).

3. The engine cylinder head with enhanced valve cooling according to claim 2, characterized in that: The top water inlet pipe (5) has a vacuum chamber (502) on its body, and the vacuum chamber (502) is in a vacuum state.

4. The engine cylinder head with enhanced valve cooling according to claim 2, characterized in that: The heat dissipation component (6) includes a top connecting plate (602) and an annular heat-conducting plate (601). Several fins (603) are fixed on the inner side of the annular heat-conducting plate (601). A flow groove (604) is formed between two adjacent fins (603). Several drainage holes (605) communicating with the flow groove (604) are opened on the plate body of the top connecting plate (602). The inner side of the fin (603) is in contact with the outer side of the top water inlet pipe (5).

5. The engine cylinder head with enhanced valve cooling according to claim 2, characterized in that: The ratio of the inner diameter of the bottom water inlet pipe (501) to the inner diameter of the top water inlet pipe (5) is (0.3-0.7):

1.

6. The engine cylinder head with enhanced valve cooling according to claim 1, characterized in that: The top of the vertical groove (401) is fixed with an extended annular plate (7), and the top surface of the extended annular plate (7) and the top surface of the top water inlet pipe (5) are on the same horizontal plane.

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