Low-noise double-blade roots blower
A low-noise, blower technology, applied in the direction of mechanical equipment, machines/engines, liquid fuel engines, etc., can solve the problems of large impact vibration, noise, pulsation, etc., to reduce gas impact, reduce noise, and increase compression time Effect
Inactive Publication Date: 2014-01-22
刘保龙
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Problems solved by technology
However, there is no buffer when the low-pressure gas in the existing blower contacts the high-pressure gas at the outlet, resulting in large gas pulsation, which in turn produces large impact vibration and noise
Method used
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[0012] As shown in the figure, a low-noise double-lobe Roots blower includes a casing 1, blades 2, air inlet 3, blade shaft 4, noise reduction arc 5, main arc 6, air outlet 7, and center line 8; The contour curve of the casing 1 is symmetrical up and down. The inner contour of the casing 1 is divided into a noise reduction arc 5 and a main arc 6. The main arc 6 takes the axis center of the blade shaft 4 as the center, and the center of the noise reduction arc 5 is biased to the outlet relative to the axis center of the blade shaft 4. The air port 7, the center of the noise reduction arc 5 is biased to the center line 8 relative to the axis of the blade shaft 4, the main arc 6 and the noise reduction arc 5 are cut, the central angle corresponding to the main arc 6 is greater than or equal to 180°, the air inlet 3 and the The width of the air outlet 7 is smaller than the distance between the axes of the two blade shafts 4, and the air inlet 3 is narrower than the air outlet 7. T...
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The invention discloses a low-noise double-blade roots blower which comprises a housing, blades, an air inlet, blade shafts, noise reduction arcs, main arcs, an air outlet and a center line, wherein a contour curve of the housing is in longitudinal symmetry; the inner contour of the housing is divided into the noise reduction arcs and the main arcs; the main arcs and the noise reduction arcs are intercrossed; central angles corresponding to the main arcs are larger than or equal to 180 degrees; the widths of the air inlet and the air outlet are smaller than a distance between the axes of the two blade shafts; the air inlet is narrower than the air outlet; the width of the air inlet is reduced, so that the central angles are larger than 180 degrees; the width of the air outlet is reduced, so that the noise reduction arcs are elongated; therefore, the compression time of low-pressure air can be prolonged; the low-pressure air starts to be in gradual contact with high-pressure air at an intercrossing point, so that the air impact is greatly reduced, and noise caused by running of the roots blower is alleviated. The central angles corresponding to the main arcs are larger than or equal to 180 degrees, so that the low-pressure air cannot be in contact with the high-pressure air before being in contact with the air inlet.
Description
technical field [0001] The invention relates to the field of fluid machinery, in particular to a low-noise double-blade Roots blower. Background technique [0002] The Roots blower is a volumetric blower, and the air volume delivered is proportional to the speed. There is always a small gap between the end face of the impeller and the front and rear end covers of the fan, and between the impellers of the fan. The wall feeds to the discharge side. The inner cavity of the fan does not need lubricating oil, high efficiency and energy saving, high precision, long life, compact structure, small size, light weight, easy to use, and the product has a wide range of uses, covering petrochemical, building materials, electric power, smelting, chemical fertilizers, mines, ports, textiles , Food, paper making, aquaculture and sewage treatment, environmental protection industry and many other fields, mostly used to transport air, also can be used to transport gas, hydrogen, acetylene, ca...
Claims
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IPC IPC(8): F04C29/06F04C29/12
Inventor 刘保龙许伯彦于复生
Owner 刘保龙