Mining combined local fan with tandem cascade

A technology of tandem cascades and local ventilation, which is applied to components of pumping devices for elastic fluids, mechanical equipment, non-variable pumps, etc., can solve limited and high aerodynamic noise problems, and reduce rotational noise , reduce aerodynamic noise, and smooth the flow path

Inactive Publication Date: 2013-04-17
PINGAN ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the common and most commonly used local ventilator adopts the counter-rotating two-stage impeller to achieve ventilation. To achieve a certain amount of ventilation through the two-stage impeller, it must reach a certain speed, and a higher speed will It brings high aerodynamic noise, and the effect of reducing noise by adjusting means other than changing the speed is very limited

Method used

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  • Mining combined local fan with tandem cascade

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Embodiment 1

[0014] Embodiment 1, the present invention includes a current collector 1, a front muffler 2, fan power, a two-stage main unit and a sound-absorbing diffuser cylinder 10, each main unit includes a two-stage impeller, which is connected in series with the vanes to form four impeller stages. The first-stage impeller 3, the middle guide vane 4, the second-stage impeller 5, the third-stage impeller 6, the rear guide vane 9 and the fourth-stage impeller 8 are connected in series in sequence, the guide vane is fixed on the casing, the first-stage impeller 3 and the second-stage impeller 5 are composed of a The three-stage impeller 6 and the four-stage impeller 8 are driven by the two-stage fan motor, and the two motors have the same speed and opposite directions, so that the two-stage impeller 5 and the three-stage impeller 6 form a counterrotating structure. The impeller adopts tandem cascades, which can effectively restrain the airflow separation and reduce the aerodynamic noise ca...

Embodiment 2

[0015] In Embodiment 2, in the present invention, a middle guide vane 4 may be provided between the first-stage impeller 3 and the second-stage impeller 5 , and a rear guide vane 9 may be provided between the third-stage impeller 6 and the fourth-stage impeller 8 . refer to figure 1 , and the rest are the same as the above-mentioned embodiment.

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Abstract

A mining combined local fan with a tandem cascade comprises a collector (1), a pre-silencer (2), fan power, a two-stage main set and a silencing diffuser section (10). A two-stage impeller of a primary fan, a two-stage impeller of a secondary fan and two groups of guide blades are serially connected to form a four-stage series fan. By the aid of the tandem cascade and a combined series structure, airflow separation is suppressed, aerodynamic noise of the fan is reduced, and total pressure of the fan is increased. The fan runs at the rotation speed of a four-pole motor, rotation noise of the fan is effectively reduced, the sound level A of the fan is reduced by about 10dB according to detection, and wind pressure and flow of a two-pole motor in running are achieved. A contra-rotating axial flow integrated structure is reserved, a flow channel of the fan is kept smooth, and the running efficiency of the fan is improved. Motor shells directly contact with airflow in the flow channel, the motors are cooled by the airflow generated by the fan, temperature rise of the motors is reduced, the service lives of the motors are prolonged, and running safety of the fan is ensured.

Description

technical field [0001] The invention relates to a local ventilator, in particular to a mine-used combined tandem cascade local ventilator. Background technique [0002] At present, the common and most commonly used local ventilator adopts the counter-rotating two-stage impeller to achieve ventilation. To achieve a certain amount of ventilation through the two-stage impeller, it must reach a certain speed, and a higher speed will It brings high aerodynamic noise, and the effect of reducing noise by adjusting means other than changing the speed is very limited. Contents of the invention [0003] The technical purpose of the present invention is to provide a mine-used combined tandem cascade local ventilator which can effectively reduce noise. [0004] The technical solution adopted by the present invention to solve its technical problems is: it includes a current collector 1, a front muffler 2, fan power, a two-stage main unit and a sound-absorbing diffuser cylinder 10, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/32
Inventor 陈重新肖务里肖亮王友平
Owner PINGAN ELECTRICAL
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