Spark plug sheath structure of natural gas engine cylinder cover
By designing a natural gas engine cylinder head spark plug sheath structure containing a vermicelite molded cast cylinder head base plate and a spark plug installation boss, the problem of cylinder head cracking in high temperature environment is solved, and the effect of reducing temperature and fault reduction is achieved.
Patent Information
- Application Number
- CN202420501264.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-15
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-03-15
AI Technical Summary
The cylinder heads of existing natural gas engines are prone to cracking in high temperature environments, especially in the nose bridge area with high temperature and large temperature difference, resulting in high failure efficiency and weak reliability.
A natural gas engine cylinder head spark plug sheath structure is designed, including a cylinder head composed of a cylinder head base, a spark plug installation boss and a mounting hole, a spark plug, a sealing gasket, a spark plug sheath and a water jacket. The cylinder head base plate and the spark plug installation boss are integrally formed and cast. The material is vermicelli, which has good thermal conductivity and ductility, and reduces the temperature through cooling water.
Through this structure, the heat from the cylinder head bottom plate can be quickly exported, the temperature can be reduced, and the high-temperature cracking fault can be reduced; at the same time, the spark plug is cooled through the water jacket to reduce its body temperature and reduce the high-temperature ablation fault rate.
Smart Images
Figure CN222785639U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of natural gas engines, and in particular relates to a spark plug sleeve structure of a cylinder cover of a natural gas engine. Background Art
[0002] Among various engine products currently available, natural gas engines are becoming increasingly widely used due to their low gas prices, good operating economy, and clean emissions. According to their different ignition methods, they can be divided into spark-ignition natural gas engines, compression-ignition natural gas engines, and diesel-ignition natural gas engines.
[0003] However, as the power of existing natural gas engines increases, the combustion temperature becomes higher and higher, causing the cylinder head to be unable to withstand the high temperature and cracking, especially in the nose bridge area of the cylinder head where the temperature is high and the temperature difference is large, resulting in a high failure rate and poor reliability. Utility Model Content
[0004] The utility model provides a spark plug sleeve structure for a cylinder head of a natural gas engine, which solves the problems raised in the above background technology.
[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a natural gas engine cylinder head spark plug sleeve structure, including a cylinder head, which is composed of a cylinder head base plate, a spark plug mounting boss and a mounting hole, and also includes a spark plug, a sealing gasket, a spark plug sleeve and a water jacket.
[0006] Preferably, the cylinder head base plate and the spark plug mounting boss are integrally cast.
[0007] Preferably, the mounting hole consists of a threaded portion and a smooth hole portion.
[0008] Preferably, the spark plug is connected to a spark plug sleeve, the spark plug is threadedly connected to the mounting hole, and the spark plug sleeve is connected to the mounting hole via a sealing gasket.
[0009] The beneficial effects of adopting the above technical solution are:
[0010] 1. The cylinder head base plate and the spark plug mounting boss are integrally molded and cast. The material is vermicular iron, which has strong thermal conductivity and ductility. It can quickly conduct heat from the cylinder head base plate and take it away through cooling water, thereby reducing the temperature of the cylinder head base plate and reducing high-temperature cracking failures.
[0011] 2. After the spark plug passes through the high temperature of the combustion chamber, the temperature is transferred to the spark plug mounting boss through the threaded part of the mounting hole, and then the temperature is taken away by the cooling water in the water jacket, thereby reducing the temperature of the spark plug body and reducing the high-temperature ablation failure rate of the spark plug. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a structural diagram of the cylinder head provided by the utility model;
[0013] Figure 2 This is a cross-sectional view of the cylinder head without the spark plug installed;
[0014] Figure 3 This is a cross-sectional view of the cylinder head with the spark plug installed;
[0015] Figure 4 It is a cross-sectional view of a spark plug;
[0016] in:
[0017] 1. Cylinder head; 11. Cylinder head base plate; 12. Spark plug mounting boss; 13. Mounting hole; 2. Spark plug; 3. Sealing gasket; 4. Spark plug boot; 5. Water jacket. DETAILED DESCRIPTION
[0018] The following is a further detailed description of the specific implementation methods of the present invention by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and to facilitate its implementation.
[0019] Specifically, if Figures 1 to 4 As shown, a spark plug sleeve structure of a natural gas engine cylinder head includes a cylinder head 1, which is composed of a cylinder head base plate 11, a spark plug mounting boss 12 and a mounting hole 13, and also includes a spark plug 2, a sealing gasket 3, a spark plug sleeve 4 and a water jacket 5.
[0020] The cylinder head base plate 11 and the spark plug mounting boss 12 are integrally formed and cast.
[0021] It should be noted that the cylinder head base plate 11 and the spark plug mounting boss 12 are made of vermicular iron, which has strong thermal conductivity and ductility. It can quickly conduct heat from the cylinder head base plate and take it away through cooling water, thereby reducing the temperature of the cylinder head base plate and reducing high-temperature cracking failures. It has a simple structure, high strength, and is easy to implement.
[0022] The mounting hole 13 consists of a threaded portion and a smooth hole portion.
[0023] It should be noted that the threaded portion is used for threaded connection with the spark plug 2, and the light hole portion avoids a full threaded structure in order to prevent stress concentration caused by the thread being exposed to high temperature, which may cause cracking of the cylinder head base plate 1-1. The R fillet design also adopts the same mechanism to reduce the contact between sharp edges and high-temperature gases, thereby reducing stress concentration.
[0024] The spark plug 2 is connected to the spark plug sleeve 4 , the spark plug 2 is threadedly connected to the mounting hole 13 , and the spark plug sleeve 4 is connected to the mounting hole 13 via a sealing gasket 3 .
[0025] The specific working method is described below with specific embodiments: Example 1
[0026] After the spark plug 2 passes through the high temperature of the combustion chamber, the temperature is transferred to the spark plug mounting boss 12 through the threaded portion of the mounting hole 13, and then the temperature is taken away by the cooling water in the water jacket 5, thereby reducing the body temperature of the spark plug 2 and reducing the high temperature ablation failure rate of the spark plug 2.
[0027] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above-mentioned concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.
Claims
1. A spark plug sleeve structure for a natural gas engine cylinder head, characterized in that: The invention comprises a cylinder head (1), wherein the cylinder head (1) is composed of a cylinder head base plate (11), a spark plug mounting boss (12) and a mounting hole (13), and further comprises a spark plug (2), a sealing gasket (3), a spark plug sleeve (4) and a water jacket (5); the mounting hole (13) is composed of a threaded portion and a light hole portion; the spark plug (2) is connected to the spark plug sleeve (4), the spark plug (2) is threadedly connected to the mounting hole (13), and the spark plug sleeve (4) is connected to the mounting hole (13) via the sealing gasket (3).
2. The spark plug sleeve structure of a cylinder head of a natural gas engine according to claim 1, characterized in that: The cylinder head bottom plate (11) and the spark plug mounting boss (12) are integrally cast.