Single-double-suction adjustable centrifugal ventilator
A centrifugal fan, adjustable technology, applied in the direction of mechanical equipment, non-variable pumps, machines/engines, etc., can solve the problems affecting the operating efficiency of the fan, unstable flow state, increased flow loss, etc., to reduce Instability phenomenon, improvement of stability, and effect of reducing flow loss
Inactive Publication Date: 2015-05-27
ZHEJIANG SCI-TECH UNIV +1
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In summary, when the ventilator operates at low flow rate, an unstable flow state will occur, resulting in flow instability, increased flow loss, and increased noise, seriously affecting the operating efficiency of the ventilator, and may even lead to catastrophic accidents happened
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[0014] The present invention will be further described below with reference to the drawings and embodiments.
[0015] Such as figure 1 , 2 As shown in and 3, a single- and double-suction adjustable centrifugal fan includes an air intake device, an impeller assembly 5, a volute 6, a runner partition 7, a diffuser 8, a main shaft 10 and a motor 11; the air intake device includes Intake elbow 1, intake box 3 and collector 4; two collectors 4 are fixed at the inlets on both sides of the volute 6, and respectively communicate with the outlet end of an intake box 3; two intakes The inlet end of the box 3 is connected with the inlet elbow 1; the inlet elbow 1 is provided with a three-way valve 2 at the bend; the diffuser 8 is fixed at the outlet of the volute 6, and the outlet of the volute 6 is connected to the diffuser A butterfly check valve 9 is provided between the volute 8; a flow channel partition 7 is provided at the center longitudinal section of the volute 6, and the flow chan...
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The invention discloses a single-double-suction adjustable centrifugal ventilator. When the ventilator operates at low flow, a stable flowing state generates, and noises are increased, so that the operation efficiency is seriously influenced. Two current collectors of the single-double-suction adjustable centrifugal ventilator are fixed at inlets of two sides of a volute and are respectively communicated with the air outlet ends of corresponding air inlet tanks; the air inlet ends of the two air inlet tanks are respectively communicated with an air inlet elbow; the air inlet elbow is provided with a three-way valve at a curve; a diffuser is fixed at an outlet of the volute; a runner separation board is arranged at the center longitudinal section of the volute; an impeller assembly comprises a first impeller and a second impeller which are arranged on two sides of the runner separation board. According to the single-double-suction adjustable centrifugal ventilator disclosed by the invention, when the flow of air current is greater, by adopting a double-inlet and double-suction form, the total pressure and the efficiency of the centrifugal ventilator are improved, and the operation range at high low is widened; when the flow is smaller, by adopting a single-inlet and single-suction form, unstable phenomena are reduced, flow losses are reduced, and reasonable operation range of the centrifugal ventilator under low flow is widened.
Description
Technical field [0001] The invention belongs to the field of ventilation equipment, relates to a centrifugal fan, in particular to a single and double suction adjustable centrifugal fan. Background technique [0002] The centrifugal fan is mainly composed of current collector, impeller, volute and diffuser. The gas is guided to the impeller through the collector, and the pressure rises due to the rotation of the impeller. The gas from the impeller is collected by the volute and guided to the outlet of the volute, and then diffused again by the diffuser, then transported to the pipeline or discharged into the atmosphere. [0003] When the fan is running at a small flow rate, the frequent flow phenomena mainly include separation, vortex, flow off, wake, etc., and secondary flow is often inevitable. These unsteady and complex flows exist throughout the entire operating conditions, and they are the source of the energy loss and noise increase of the centrifugal fan. In addition, the...
Claims
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Login to View More IPC IPC(8): F04D25/08F04D29/28F04D29/44F04D27/00
CPCF04D25/08F04D27/00F04D29/281F04D29/441
Inventor 窦华书肖美娜魏义坤陈小平杨徽徐金秋陈永宁曹文斌何海江应存列叶信学
Owner ZHEJIANG SCI-TECH UNIV