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Patent name: manufacturing method of centralized lubrication system for construction machinery
The invention relates to a lubrication system of construction machinery, in particular to a centralized lubrication system for construction machinery.
At present, general construction machinery will set lubricating grooves at the joints of various components, and then inject grease through the grease pipe and grease fitting. Each lubrication system is independent of each other. In order to facilitate the filling of grease, the grease fitting will be led to the position convenient for filling on the equipment with the grease pipe. After the equipment is used for a period of time, it needs to be supplemented with grease. Because there are many parts that need to be filled with grease, it is easy to miss. In order to ensure good lubrication between moving parts, some manufacturers have developed centralized lubrication systems. However, this centralized lubrication system generally pushes the plunger in the progressive oil separator through the pressure grease delivered by the electric lubrication pump, so that the plunger moves back and forth in order to deliver the grease to each lubrication part. However, the system is expensive and the control mode is complex, which is not conducive to be widely used in low-end construction machinery. Chinese patent zl200820080915 The utility model discloses a centralized lubrication device, which comprises a lubricating oil distribution head with a drip hole on it, an oil storage tank connected with the lubricating oil distribution head through a transmission pipe, an air compressor connected with the oil storage tank through a transmission pipe, a control valve arranged on the oil transmission pipeline and a pressure regulator arranged on the gas transmission pipeline. However, this centralized lubrication system is suitable for liquid lubricating oil, which is mainly used for the lubrication of traction chains, and is not suitable for the lubrication between moving parts of construction machinery.
summary of the invention
The purpose of the invention is to provide a centralized lubrication system for construction machinery. The system has simple structure and can be directly added to the existing equipment without major changes to the existing whole machine. The technical scheme relates to a centralized lubrication system for construction machinery, which comprises an air compressor, an air storage tank, an air circuit on-off valve, a grease cylinder and a distribution valve block; The air compressor fills the compressed air into the air storage tank, the air storage tank is connected to the air inlet chamber of the grease cylinder through the air circuit on-off valve, and the grease chamber of the grease cylinder is connected with each lubrication point through the distribution valve block. A brake pedal is arranged between the air storage tank and the air circuit on-off valve. The inner diameter of the air inlet chamber of the grease cylinder is larger than the inner diameter of the grease chamber. Working principle when the engine is working, the air compressor equipped with the engine stores air with a certain pressure in the air storage tank for braking during the operation of the whole machine. The centralized lubrication system uses the air tank and brake pedal of the whole machine. When the brake pedal is pressed, the air tank is connected, and the compressed air in the air tank reaches the air circuit on-off valve through the opening of the brake pedal. If the air circuit on-off valve is closed, the pressure air cannot pass through the air circuit on-off valve, and the lubrication system does not work at this time. When the air circuit on-off valve and distribution valve block are opened, the pressure air reaches the grease cylinder through the air circuit on-off valve. Through the pressurization of large and small cavity area, the grease in the small cavity is pushed into the distribution valve block. By selecting the opening and closing of some circuits on the distribution valve block that need lubrication switches, the grease is sent to the grease pipeline, and the pipeline is connected to each lubrication point respectively. The invention has the advantages of simple structure and low cost, and can realize the centralized lubrication between the moving parts of construction machinery equipment. For the equipment that originally adopts air top oil braking, the remaining parts of the system can be directly added by directly borrowing the original air storage tank and brake pedal.
Post time: Mar-10-2022