2results about How to "Increase delivery pressure" patented technology

This invention relates to the field of centrifugal fan technology, and particularly to a high-pressure centrifugal fan with backward-curved blades. The fan includes a volute, an impeller, and a collector. Both the impeller and the collector are housed within the volute, and the collector is fixedly connected to the volute. The impeller includes a front plate and a rear plate. Multiple blades are arranged in an array around the rear plate. An air intake is located in the center of the front plate. The blades are of a single-plate straight structure, each blade including a leading edge, a trailing edge, a first side connecting the first end of the leading edge and the first end of the trailing edge, and a second side connecting the second end of the leading edge and the second end of the trailing edge. The first side is the side closest to the air intake, and the second side is the side furthest from the air intake. The leading edge includes an arc segment near the air intake and a straight segment away from the air intake. The trailing edge is a straight segment. Both the straight leading edge and the trailing edge are parallel to the impeller hub, and the second side is perpendicular to the impeller hub. This high-pressure centrifugal fan has a larger flow rate and higher pressure.

The utility model provides a concentrated-phase pneumatic conveying device with a two-stage pressurizing structure, which relates to the field of pneumatic conveying equipment, comprises a transfer tank with an internal hollow structure, and solves the problem that when the conventional concentrated-phase pneumatic conveying device is used for conveying high-viscosity and high-density materials or for long-distance conveying, the transfer tank is difficult to transfer. In order to solve the problems of conveying interruption, material deposition and the like caused by insufficient pressure of a single pressurizing structure in the prior art, a two-stage pressurizing system is formed by primarily pressurizing materials in a transfer tank through a pressurizing pump and secondarily pressurizing airflow through a pulse pressurizing structure composed of a servo motor, a driving gear, a tooth row, a piston plate and the like. The whole conveying pressure is remarkably improved through two-stage pressurization, the problems of conveying interruption and material deposition caused by insufficient pressure during long-distance conveying of high-viscosity and large-density materials are effectively solved, and the continuity of the conveying process is ensured.