Cylinder head

Abstract

The present invention discloses a cylinder head, comprising: a cylinder head body, a water inlet, an upper water jacket, a lower water jacket, a water baffle, a water outlet and a seat ring. The water inlet is opened at the upper part of the cylinder head body. The upper water jacket is fixed to the inner top of one side of the cylinder head body, and the upper water jacket is connected to the water inlet. The lower water jacket is fixed to the inner bottom of one side of the cylinder head body. The water baffle is arranged at the interval between the upper water jacket and the lower water jacket. The water outlet is opened at the lower part of the cylinder head body. And the seat ring is arranged at the bottom of the cylinder head body. Among them, a circular hole is opened in the middle of the water baffle, and the upper water jacket is connected to the lower water jacket through the circular hole. Thereby, the cylinder head of the present invention has a simple and reasonable structure and a good cooling effect, which can prevent the various parts of the engine combustion system from overheating and causing performance degradation, and improve the performance of the engine.

Description

Technical Field

[0001] The invention relates to the technical field of diesel engines, in particular to a cylinder head. Background Art

[0002] The cylinder head is a key part of the engine and an indispensable part of the engine combustion chamber. Clean air enters the combustion chamber through the cylinder head and mixes with the fuel for compression ignition. During combustion, the cylinder head has to withstand the high temperature and high pressure brought by combustion, so the cooling of the cylinder head is particularly important. The water-cooled engine removes the heat generated by the flow of liquid. If the cooling effect is not good, the cylinder head is very likely to crack, leak air, leak water, leak oil, etc., causing the engine performance to decline or even damage the engine.

[0003] The existing cylinder head (CN102797583A) adopts a water-cooling method. The water flow field is from bottom to top. The incoming water is acted downward by gravity. The existence of the reaction force causes the cooling water flow rate to decrease, and it is impossible to take away more heat with the flow of water, and the heat dissipation of the cylinder head is affected. The water flows into the X-shaped water channel of the cylinder head from the four water holes at the bottom of the cylinder head, and converges to the middle of the bottom of the cylinder head to cool the injector. The X-shaped water channel is in the middle of the four valve seat rings of the cylinder head. The water flow can only cool the heat conducted from the high-temperature seat ring area to the X-shaped water channel. There is no direct contact, and the cooling effect is very general. As the water intake of the cylinder head increases, the water level continues to rise inside the cylinder head. Through heat conduction, the heat generated by the combustion of the cylinder head is taken away by water to cool the valve seat ring, airway, etc., and wait until the water level rises to the upper part of the water jacket on the cylinder head, and flows out from the circular hole on the upper part.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide a cylinder head with a simple and reasonable structure and good cooling effect, which can prevent various parts of the engine combustion system from overheating and causing performance degradation, and improve the performance of the engine.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a cylinder head, comprising: a cylinder head body, a water inlet, an upper water jacket, a lower water jacket, a water baffle, a water outlet and a seat ring. The water inlet is opened at the upper part of the cylinder head body. The upper water jacket is fixed to the inner top of one side of the cylinder head body, and the upper water jacket is connected to the water inlet. The lower water jacket is fixed to the inner bottom of one side of the cylinder head body. The water baffle is arranged at the interval between the upper water jacket and the lower water jacket. The water outlet is opened at the lower part of the cylinder head body. And the seat ring is arranged at the bottom of the cylinder head body. Among them, a circular hole is opened in the middle of the water baffle, and the upper water jacket is connected with the lower water jacket through the circular hole.

[0007] In one embodiment of the present invention, the water barrier has a longitudinal water channel, and the longitudinal water channel leads water directly down to the seat ring.

[0008] In one embodiment of the present invention, the upper water jacket is larger than the lower water jacket.

[0009] In one embodiment of the present invention, the water outlet is located at the bottom of the lower water jacket and close to the outer side of the cylinder head body.

[0010] In one embodiment of the present invention, a ring-shaped water groove is arranged around the seat ring, and the longitudinal water channel is connected to the ring-shaped water groove.

[0011] In one embodiment of the present invention, the water channel in the cylinder head body is Y-shaped.

[0012] Compared with the prior art, the cylinder head according to the present invention has a simple and reasonable structure and a good cooling effect, and can prevent various parts of the engine combustion system from overheating and causing performance degradation, thereby improving the performance of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic cross-sectional structural diagram of a cylinder head according to an embodiment of the present invention;

[0014] Figure 2 is a schematic cross-sectional structure diagram of a Y-shaped water channel of a cylinder head according to an embodiment of the present invention;

[0015] Figure 3 Schematic diagram of water flow direction of a Y-shaped water channel of a cylinder head according to an embodiment of the present invention.

[0016] Description of main reference numerals:

[0017] 1-water inlet, 2-upper water jacket, 3-water baffle, 4-lower water jacket, 5-ring seat water groove, 6-Y-type water channel, 7-water outlet. DETAILED DESCRIPTION

[0018] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0019] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0020] Figure 1 Schematic diagram of the cross-sectional structure of a cylinder head according to an embodiment of the present invention. Figure 2It is a schematic cross-sectional structure diagram of a Y-shaped water channel of a cylinder head according to an embodiment of the present invention. Figure 3 Schematic diagram of water flow direction of a Y-shaped water channel of a cylinder head according to an embodiment of the present invention.

[0021] like Figures 1 to 3 As shown, a cylinder head according to a preferred embodiment of the present invention includes: a cylinder head body, a water inlet 1, an upper water jacket 2, a lower water jacket 4, a water baffle 3, a water outlet 7 and a seat ring. The water inlet 1 is opened at the upper part of the cylinder head body. The upper water jacket 2 is fixed to the top of the inner side of the cylinder head body, and the upper water jacket 2 is connected to the water inlet 1. The lower water jacket 4 is fixed to the inner bottom of one side of the cylinder head body. The water baffle 3 is arranged at the interval between the upper water jacket 2 and the lower water jacket 4. The water outlet 7 is opened at the lower part of the cylinder head body. And the seat ring is arranged at the bottom of the cylinder head body. Among them, a circular hole is opened in the middle of the water baffle 3, and the upper water jacket 2 is connected with the lower water jacket 4 through the circular hole.

[0022] In one embodiment of the present invention, the baffle 3 has a longitudinal water channel, and the longitudinal water channel leads water directly down to the seat ring. The upper water jacket 2 is larger than the lower water jacket 4. The water outlet 7 is located at the bottom of the lower water jacket 4 near the outer side of the cylinder head body.

[0023] In one embodiment of the present invention, a ring ring water groove 5 is provided around the ring ring, and the longitudinal water channel is connected to the ring ring water groove 5. The water channel in the cylinder head body is Y-shaped (ie, Y-shaped water channel 6).

[0024] In practical applications, the cylinder head of the present invention has a water inlet 1, a water outlet 7, an upper water jacket 2, a lower water jacket 4 and a baffle 3. The water inlet 1 is the entrance for cooling water to enter the cylinder head, and is arranged at the upper part of the upper water jacket 2 (i.e., the upper part of the cylinder head body). The water outlet 7 is arranged in the lower water outlet hole of the lower water jacket 4 (i.e., arranged at the bottom of the cylinder head body). The water jacket (upper water jacket 2 and lower water jacket 4) is a non-entity space in the inner cavity of the cylinder head, that is, an area where water can flow. The baffle 3 is arranged in the middle of the water jacket, separating the upper and lower water jackets 4, and a circular hole is opened in the middle to guide the water to the sewer, which plays a role in changing the flow channel.

[0025] The cylinder head design described in this article is cooled from top to bottom by the water flow field. In this way, due to the effect of gravity, the water flow has better fluidity and uniformity, and can take away more heat. The water flows in from the water inlet 1 on the upper part of the water jacket. The large diameter water inlet 1 allows the cooling water to quickly enter the interior of the cylinder head in large quantities to cool the high temperature caused by combustion. A baffle 3 design is added between the upper and lower water jackets 4. The water flows from the opening in the middle of the baffle 3 to the lower water jacket 4, forcing drainage. The larger water flow also better cools the high temperature around the nozzle. The water flows from the middle of the lower water jacket 4 to the surrounding area, taking away the high temperature conducted from the fire surface on the bottom of the cylinder head, and then flows out from the four water holes on the edge of the lower water jacket 4. In addition, a longitudinal water channel is added to the water baffle 3 to lead water directly down to the seat ring. Through the design of the Y-shaped water channel 6 and the water groove 5 around the seat ring (one end of the Y-shaped water channel 6 is connected to the water inlet 1, and the other two ends are respectively connected to the water outlet 7, and the center point is the position of the water groove 5 around the seat ring), water is forced to be led in to cool the high-temperature valve seat ring. The cooling water flows directly through the high-temperature valve seat ring, which brings better heat dissipation effect than the original water channel flowing through the side of the seat ring, and can improve the failure of overheating, eccentric wear and air leakage of the seat ring.

[0026] Improving the cooling capacity of the cylinder head is of great significance to the engine. Strong cooling capacity can take away more heat and prevent the various parts of the engine combustion system from overheating and causing performance degradation. Because the upper limit of the temperature tolerance of the material is constant, but after the cooling capacity is improved, the temperature of the parts will drop and the parts will not easily overheat. For engine designers, this can increase the power of the engine to obtain stronger performance and bring better economic benefits.

[0027] In summary, the cylinder head of the present invention has a simple and reasonable structure and a good cooling effect, and can prevent various parts of the engine combustion system from overheating and causing performance degradation, thereby improving the performance of the engine.

[0028] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A cylinder head, characterized in that: include: Cylinder head body; A water inlet is provided at the upper portion of the cylinder head body; An upper water jacket is fixed to the inner top of one side of the cylinder head body, and the upper water jacket is connected to the water inlet; A lower water jacket, fixed to the inner bottom of one side of the cylinder head body; A water baffle, arranged at the interval between the upper water jacket and the lower water jacket; a water outlet, which is disposed at the lower portion of the cylinder head body; and A seat ring, arranged at the bottom of the cylinder head body; Wherein, a circular hole is opened in the middle of the water baffle, and the upper water jacket is connected with the lower water jacket through the circular hole; Wherein, the baffle has a longitudinal water channel, and the longitudinal water channel leads water directly down to the seat ring; Wherein, the upper water jacket is larger than the lower water jacket; Wherein, the water outlet is located at the bottom of the lower water jacket near the outer side of the cylinder head body; Wherein, a ring-shaped water groove is arranged around the seat ring, and the longitudinal water channel is connected with the ring-shaped water groove; Wherein, the water channel in the cylinder head body is Y-shaped; Among them, one end of the Y-shaped water channel is connected to the water inlet, and the other two ends are respectively connected to the water outlet, and the center point is the position of the ring seat ring water tank.

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