Li Yushan graduated from the Dalian Institute of Technology Marine Engineering Department in 1982. His graduation thesis is about the research and experiment of diesel engine combustion theory. He has been conducting this research for a long time.
In the combustion chamber of the new diesel engine, he believes that there are two basic contradictions in the combustion process of modern diesel engines. This is the contradiction between the atomization fineness, uniformity and diffusion degree of the fuel spray and the penetration depth; the initial combustion amount and the main combustion process The contradiction between fuel consumption. In order to solve the above contradiction and adopt measures such as intake vortex, a new contradiction of eddy current loss is generated. Therefore, how to solve the above three major contradictions is a key issue to comprehensively improve the various economic and technical indicators of diesel engines.
The process of diffusion and gasification of fuel spray in the combustion chamber of a new diesel engine combustor and the formation of a mixture of air is essentially a process of momentum transfer, mass transfer and heat transfer between the oil mist and the air. The "three-pass" process is basically carried out simultaneously. Throughout the combustion process, how the “three-pass†process determines the quantity and quality of the combustible mixture, and determines the speed and quality of the combustion process. Therefore, the ability to control the "three-pass" process between the organization's fuel spray and air is a decisive factor in controlling the combustion process of diesel engines.
There are three major momentums in the combustion chamber of the diesel engine, namely the amount of air squeezing, the amount of fuel jet flow, and the amount of combustion rush. The well-designed combustion chamber structure is the most important means to complete the organization of the three major momentums, control the "three-pass" process, and solve the three major contradictions. To complete the design of a reasonable combustion chamber structure, it must be based on a deep understanding of the three major contradictions in the combustion chamber, the three major momentums, and the motion process and motion laws of the "three-pass" process.
To this end, he proposed a controlled high atomization combustion theory and designed a super-ω-ring-type combustion chamber. The water simulation test proves that this new type of combustion chamber has a good vortex flow field, which effectively improves the combustion level of the diesel engine and avoids the eddy current loss caused by the general strong vortex combustion chamber. The test results of the actual machine bench prove that this new combustion theory and the new super-ω-ring mountain type combustion chamber can better solve the above three contradictions and achieve approximate isobaric combustion. This new type of combustion chamber effectively improves the operating condition of the direct injection diesel engine, effectively reduces the fuel consumption per unit of diesel engine, and effectively improves the economic and technical indicators of the diesel engine. It is a new type of diesel engine combustion chamber worthy of promotion.
Construction hoist is vertical transport machinery driving by pinion and rack, mainly used on construction site for transportation of personal and materials. As a permanent or sub-permanent external elevator, it also applies to store house, dock, high tower, high chimney, etc.
There are single cage and double cages hoist. According to the need gets rid of one cage of double cages the hoist will be changed to single cage hoist. SC Construction Hoist is equipped with reliable electrical and mechanical safety device. It is efficient and safety vertical transporting equipment.
Spare parts for a construction hoist may include:
1. Wire Rope: These are used to lift and lower the load in the hoist. They may need to be replaced if they become worn or damaged.
2. Construction Hoist Motor: The motors in the hoist are responsible for powering the lifting and lowering mechanism. Spare motors may be needed in case of motor failure.
3. Electromagnet Brake: The hoist is equipped with brakes to hold the load in place. Spare brake pads or other brake components may be necessary for maintenance or repair.
4. Control panels: The control panel is used to operate the hoist and control its movements. Spare control panels or control panel components may be required in case of malfunction.
5. Safety devices: Construction hoists are equipped with various safety devices, such as limit switches, overload protection, and emergency stop buttons. Spare safety devices may be needed to ensure the hoist operates safely.
6. Bearings and bushings: These components help reduce friction and facilitate smooth movement in the hoist. Spare bearings and bushings may be necessary for maintenance or repair.
7. Electrical components: Various electrical components, such as relays, switches, and fuses, may need to be replaced if they fail or become damaged.
8. Pulleys and sheaves: These components are used to guide and redirect the wire ropes in the hoist. Spare pulleys and sheaves may be required if they become worn or damaged.
9. Hooks and shackles: The hooks and shackles are used to attach the load to the hoist. Spare hooks and shackles may be needed if they become worn or damaged.
10. Construction Hoist Steel Structure parts: Spare structural components, such as beams or mast sections, may be required for repair or replacement if they become damaged or worn over time.
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