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CN-224214287-U - Cladding formula cylinder cap intake duct methanol injection system

CN224214287UCN 224214287 UCN224214287 UCN 224214287UCN-224214287-U

Abstract

The utility model relates to a methanol injection system of a cladding type cylinder cover air inlet channel, which relates to the field of ship engineering and power systems and comprises a cylinder cover, a cladding type adapter block obliquely arranged at one end of the top of the cylinder cover, a pressing block obliquely arranged at the top of the cladding type adapter block, and double-wall pipes transversely arranged at two sides of the pressing block, wherein the top of an alcohol sprayer is cladded in the cladding type adapter block, and the bottom of the alcohol sprayer penetrates through the top of the cylinder cover. According to the utility model, through the innovative cladding design and the double-wall pipe structure, the tightness and the safety of the system are improved, and the leakage of methanol is effectively prevented.

Inventors

  • AN ZHILIN
  • XING XINXIN
  • CHENG JUNFENG
  • GUAN XIAOPENG
  • KAI JINBIN

Assignees

  • 中船动力研究院有限公司

Dates

Publication Date
20260508
Application Date
20250509

Claims (8)

  1. 1. The wrapped cylinder cover air inlet channel methanol injection system is characterized by comprising a cylinder cover (1), a wrapped adapter block (2) obliquely arranged at one end of the top of the cylinder cover (1), a pressing block (3) obliquely arranged at the top of the wrapped adapter block (2), and double-wall pipes (4) transversely arranged at two sides of the pressing block (3), wherein the top of an alcohol sprayer (5) is wrapped in the wrapped adapter block (2) and the bottom of the alcohol sprayer penetrates through the top of the cylinder cover (1), the double-wall pipes (4) comprise an inner pipe (23) serving as a methanol conveying channel, an outer pipe (25) sleeved on the outer side of the inner pipe (23) and a connecting block (24) connected between the outer surface of the inner pipe (23) and the inner surface of the outer pipe (25), the outer pipe (25) can be connected with a negative pressure machine, and the pressing block (3) is provided with a suction hole (20) to extract leaked methanol steam.
  2. 2. The coated cylinder head port methanol injection system as claimed in claim 1, wherein the inner tube (23) is a nitrogen purge channel after shutdown for purging residual methanol from the piping.
  3. 3. The coated cylinder head port methanol injection system as in claim 2, wherein the connecting block (24) is provided with grooves.
  4. 4. The methanol injection system of the cladding cylinder cover air inlet channel according to any one of claims 1 to 3, wherein a groove for being in plug-in fit with the top of the pressing block (3) is arranged at the top of the cladding adapter block (2), and a sealing ring four (19) is arranged for sealing.
  5. 5. The coated cylinder head air inlet channel methanol injection system according to claim 4, wherein the coated adapter block (2) is provided with a sealing ring III (18) on the end surface connected with the cylinder head (1) for sealing.
  6. 6. The methanol injection system of the coated cylinder cover air inlet channel according to claim 5, wherein bolts I (6), bolts II (7) and bolts III (8) are distributed at different positions on the outer surface of the coated adapter block (2) to be connected with the cylinder cover (1), and long bolts (9) are arranged on the pressing block (3) in a penetrating manner to be connected with the coated adapter block (2).
  7. 7. A coated cylinder head inlet port methanol injection system according to any one of claims 1-3, characterized in that the alcohol injectors (5) are arranged diagonally along the inlet direction, reducing the alcohol injection resistance, and the premixing of methanol and air is made more uniform by both of the alcohol injectors (5), thereby improving the combustion efficiency.
  8. 8. The coated cylinder head air inlet channel methanol injection system according to claim 7, wherein a methanol inlet (11) is formed in the top of the alcohol sprayer (5) and is communicated with a first channel (14) in the pressing block (3) for injecting methanol into the air inlet channel, the first channel (14) can also be used as a blowing hole, a cable connector (10) is formed in the top of the alcohol sprayer (5) and is communicated with a second channel (15) in the pressing block (3), and the alcohol sprayer is sealed through a first sealing ring (16) for connecting a cable to control the operation of the alcohol sprayer (5).

Description

Cladding formula cylinder cap intake duct methanol injection system Technical Field The utility model relates to the field of ship engineering and power systems, in particular to a coated cylinder cover air inlet channel methanol injection system. Background At present, the methanol injection technology is mainly divided into two modes of direct injection in a cylinder and air inlet channel injection. Although the in-cylinder direct injection technology can realize higher combustion efficiency, the system is complex, the cost is higher, the change of the engine structure is larger, and the wide application of the technology is limited. In contrast, the methanol air inlet injection technology is the main stream direction of the research of the methanol alternative fuel technology because of the characteristics of lower technical difficulty, better premixing effect of methanol and air and the like. However, methanol is highly corrosive and toxic, which places greater demands on the safety of the methanol injection system. In the prior art, the tightness and stability of the methanol injection system are still insufficient, so that the methanol leakage can be caused, the normal operation of the system is influenced, and the harm to the environment and operators can be caused. In addition, the structural design of the existing system often fails to fully consider the physicochemical characteristics of methanol, resulting in suboptimal combustion efficiency. Disclosure of utility model The utility model aims to provide a wrapped cylinder cover air inlet channel methanol injection system, which improves the tightness and safety of the system and effectively prevents methanol leakage through an innovative wrapped design and a double-wall pipe structure. In order to achieve the above purpose, the technical scheme of the utility model provides a cladding type cylinder cover air inlet channel methanol injection system, which comprises a cylinder cover, a cladding type adapter block obliquely arranged at one end of the top of the cylinder cover, a pressing block obliquely arranged at the top of the cladding type adapter block, and double-wall pipes transversely arranged at two sides of the pressing block, wherein the top of an alcohol sprayer is cladded in the cladding type adapter block, and the bottom of the alcohol sprayer penetrates through the top of the cylinder cover. Preferably, the double-wall pipe comprises an inner pipe serving as a methanol conveying channel, an outer pipe sleeved on the outer side of the inner pipe, and a connecting block connected between the outer surface of the inner pipe and the inner surface of the outer pipe, wherein the outer pipe can be connected with a negative pressure machine. Preferably, the inner tube may be a nitrogen purge channel after shutdown for purging residual methanol from the piping. Preferably, the connecting block is provided with a groove. Preferably, the top of the cladding adapter is provided with a groove which is used for being in plug-in fit with the top of the pressing block, and is provided with a sealing ring IV for sealing. Preferably, the cover-type adapter block is provided with a third sealing ring on the end surface connected with the cylinder cover for sealing. Preferably, the briquette is provided with a suction hole to suck out the leaked methanol vapor. Preferably, the first bolt, the second bolt and the third bolt are distributed at different positions on the outer surface of the cladding adapter block so as to be connected with the cylinder cover, and the pressing block is provided with a long bolt in a penetrating manner so as to be connected with the cladding adapter block. Preferably, the alcohol sprayer is obliquely arranged along the air inlet direction, so that alcohol spraying resistance is reduced, and methanol and air are premixed more uniformly through the two alcohol sprayers, so that combustion efficiency is improved. Preferably, the top of the alcohol sprayer is provided with a methanol inlet which is communicated with a first channel in the pressing block and used for spraying methanol into the air inlet channel, the first channel can also be used as a blowing hole, and the top of the alcohol sprayer is provided with a cable interface which is communicated with a second channel in the pressing block and is sealed by a sealing ring I and used for connecting a cable to control the operation of the alcohol sprayer. In summary, the utility model has the following beneficial technical effects: The system realizes more uniform premixing of methanol and air by arranging two alcohol sprayers. The uniform premixing obviously improves the combustion efficiency, ensures the full combustion of methanol in the air inlet channel, and optimizes the performance and the fuel economy of the engine. The system adopts an innovative cladding design, and the alcohol sprayer is clad inside the cladding type adapter block and the pressing block. The desi