Control method of engine driven compressor and engine driven compressor
A technology of engine drive and control method, applied in the direction of machine/engine, pump control, mechanical equipment, etc., can solve the problem that the engine cannot stop, and achieve the effect of preventing the stop
Active Publication Date: 2018-08-14
HOKUETSU IND
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Problems solved by technology
[0032] As a result, when shifting to the second or later full-load operation after shifting to normal operation, if the load increases due to the start of suction and compression of the compressor main body under high back pressure and insufficient warm-up The increase in load caused by the increase in the viscosity of the lubricating oil is superimposed on the engine at the beginning of the acceleration operation, and the engine cannot follow the increase in load and stalls
Method used
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Embodiment Construction
[0105] Next, a structural example of the engine-driven compressor 1 that executes the control method of the present invention will be described with reference to the drawings.
[0106] 〔Overall structure of an engine-driven compressor〕
[0107] figure 1 Reference numeral 1 in the figure is the engine-driven compressor of the present invention, and the engine-driven compressor 1 includes a compressor main body 40, an engine 50 that drives the above-mentioned compressor main body 40, and stores the compressed air discharged from the above-mentioned compressor main body 40. The gas storage tank 60 stores the compressed gas discharged from the compressor main body 40 in the gas storage tank 60 , and then supplies it to a consumption side connected to an unshown air working machine or the like through a check valve 61 .
[0108] In the engine-driven compressor 1 to be controlled by the present invention, an oil-cooled screw compressor that compresses lubricating oil together with...
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The present invention provides a control method of an engine-driven compressor and the engine-driven compressor, and can prevent an engine from stalling even when a compressor main body is not warmedup and the lubricating oil is highly viscous state. In the capacity control of the engine-driven compressor, when the pressure in the air tank is equal to or higher than the no-load operating pressure, the intake control valve that opens and closes the intake port of the compressor main body is fully closed, and will be performed. The engine is set to a no-load operation with no load speed, and when the pressure in the air tank is reduced to a predetermined reference pressure lower than the no-load operating pressure, the intake control valve is fully opened, and the engine is set for the full-load operation of the rated rotational speed, the no-load rotational speed is set to be variable, and is smaller than the predetermined temperature when compared with the no-load rotational speed used when the temperature of the discharge gas of the compressor main body is equal to or higher than a predetermined temperature. The no-load speed used at the time is set to a prescribed higher speed.
Description
technical field [0001] The present invention relates to a control method of an engine-driven compressor and an engine-driven compressor implementing the control method, and more specifically, to a compressor body having lubricating oil for lubricating, cooling, and sealing a compression action space. A control method of an engine-driven compressor of an oil-cooled screw compressor that is compressed and discharged together with compressed gas, and an engine-driven compressor that executes the control method. Background technique [0002] In an engine-driven compressor equipped with an oil-cooled screw compressor that compresses compressed gas together with lubricating oil in order to lubricate, cool, and seal the compression action space as the compressor body, the compressor body and its In addition to the driven engine, there is also an air storage tank. The main body of the compressor introduces the compressed gas sprayed out together with the lubricating oil into the air...
Claims
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IPC IPC(8): F04B35/00F04B41/02F04B49/20F04B51/00F04B39/00F04B39/02
CPCF04B35/002F04B39/00F04B39/02F04B41/02F04B49/20F04B51/00
Inventor 山后正幸桐生贡
Owner HOKUETSU IND