A Centrifugal Impeller Back Guide Vane with Adaptive Function

Abstract

The invention discloses a centrifugal impeller back guide blade with a self-adaptation function. The centrifugal impeller back guide blade is composed of a front guide blade cover plate, a back guide blade cover plate, a plurality of blades and a plurality of pin shafts. The front guide blade cover plate and the back guide blade cover plate are fixedly connected with the left end and the right end of a pump body respectively, the pin shafts are fixedly connected between the front guide blade cover plate and the back guide blade cover plate and are evenly distributed in the peripheral direction, the axis lead of each pin shaft is parallel to the axis lead of a centrifugal impeller, and each pin shaft is sleeved with one blade capable of rotating around the corresponding pin shaft. A limiting pin used for limiting clockwise rotation and anticlockwise rotation of the blades is installed on the front guide blade cover plate or the back guide blade cover plate. According to the centrifugal impeller back guide blade, the rotational angle of the blades of the back guide blade can be automatically adjusted according to the actual outflow direction of the impeller, the rotational range is controlled through the limit pin, and the functions of flow guide and diffusion of the back guide blade can be better developed; accordingly, impact loss of fluid entering a volute is reduced, energy consumption is lowered, and the overall performance and working stability of impeller machinery are improved.

Description

technical field [0001] The invention relates to a centrifugal impeller in the field of fluid machinery, in particular to the rear guide vane of the flow guide element installed between the outlet of the centrifugal impeller and the inlet of the volute. flow state. Background technique [0002] Centrifugal impeller is the most widely used impeller form in fluid machinery, such as centrifugal pumps, centrifugal fans, centrifugal refrigeration compressors, etc., are all centrifugal impellers, and its application range is still expanding and its role will become more Big. The rear guide vane is a flow guide element installed between the outlet of the centrifugal impeller and the inlet of the volute. It can not only effectively improve the flow state at the outlet of the impeller (that is, the inlet of the volute), but also the kinetic energy of the fluid to rotate converted into pressure energy. However, the rear guide vanes of the existing centrifugal impellers are mostly fi...

AI Technical Summary

Problems solved by technology

However, the rear guide vanes of the existing centrifugal impellers are mostly fixed guide vanes, that is, the rear guide vanes are fixedly installed, and the fixed rear guide vanes cannot adjust their relative angle to the incoming flow according to the direction of the impeller’s outflow. Therefore, when the fluid When the machine is running under non-design conditions, starting or shutting down, this fixed rear guide vane not only cannot guide the flow well, but also hinders the flow, causing additional energy loss

In response to this problem, the Chinese patent application No. 201110027408.4, titled "Centrifugal Blower Rear Guide Vane Adjustment Mechanism", proposes a centrifugal impeller rear guide vane with an adjustment mechanism, but the structure of this adjustment mechanism is relatively complicated, Large installation space is required, and manual adjustment is required, and the adjustment task cannot be completed quickly, timely and accurately according to the actual outflow of the impeller

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