68results about How to "Avoid surge phenomenon" patented technology

The invention discloses a device for widening a stable operation area of a centrifugal compressor. The device comprises a plurality of high frequency response dynamic pressure sensors, a high frequency response dynamic strain indicator, signal conditioning equipment, a signal processing digital signal processor (DSP) module, and an air jet device, wherein the dynamic pressure sensors and the dynamic strain indicator acquire dynamic signals of the compressor during operation; the signal conditioning equipment transmits the signals to the DSP module; and the DSP module processes the signals and sends a command to a controller so as to make the air jet device act. The device can widen the stable operation area of the centrifugal compressor, namely a stability working range, and eliminates or reduces the harm of flow instability, namely stall and surge. The invention also discloses a method for widening the stable operation area of the centrifugal compressor, and a centrifugal compressor provided with the device for widening the stable operation area of the centrifugal compressor.

The invention relates to an air compressor air inflow control system and a control method thereof. The air compressor air inflow control system comprises an air inflow valve, a stopping air release valve, a circulation unloading valve, a pressure adjusting valve, a loading / unloading solenoid valve, a high / low pressure switching solenoid valve, a one-way valve, an adjustable throttling valve, a filter and a throttle valve. According to the air inlet control scheme, underloading staring of an air compressor can be achieved, low-pressure internal circulation of the air compressor system in the unloading state is maintained, two-gear system working pressure is achieved, starting difficulties of the air compressor can be overcome through the functions, energy-saving operation of the air compressor in the unloading state is guaranteed, and the high / low pressure working pressure of the system can be set according to operation requirements of clients.

An air compressor anti-surge generalized predictive control system and method relate to the field of anti-surge predictive control of air compressor control systems in the steel and chemical industries. The system includes a forward collector, a predictor and a backward actuator. The forward collector monitors the inlet and outlet pressure and flow of the pipe network, and is connected to the predictor in the form of PCI bus; the backward actuator controls the vent valve, has the function of sound and light alarm, and is connected to the predictor in the form of RS485; the predictor The controller adopts the air compressor anti-surge generalized predictive control method, combines the production load setting information input by the keyboard and the on-site operation data obtained by the forward collector, calculates, displays and stores the air compressor operating parameters, and uses the RS485 method to backward The actuator outputs predictive control information to realize predictive control of air compressor anti-surge. The system adjustment process of the invention is gentle, the control precision and dynamic quality are high, the operation is stable and reliable, and the surge phenomenon of the air compressor can be effectively prevented.

Provided in the invention is an anti-surge system for turbocharging. The system comprises a turbocharging device, a first air inlet pipe, a flow mixing device, a first air outlet pipe, a second air outlet pipe, a heat exchange device, a flow divider, and a second air inlet pipe. To be specific, the turbocharging device has a turbine motor and a compressor, wherein the turbine motor and the compressor are mutually connected. One end of the first air outlet pipe is connected with an air outlet of an internal combustion engine. The flow mixing device is connected with the other end of the first air inlet pipe and is connected with the turbine motor of the turbocharging device. One end of the first air outlet pipe is connected with the compressor of the turbocharging device and the other end is connected with an air inlet of the internal combustion engine. One end of the second air outlet pipe is connected with the compressor of the turbocharging device. The heat exchange device carries out heat exchanged with the internal combustion engine. The flow divider has an inlet and an outlet; the inlet is connected with the other end of the second air outlet pipe; and the outlet is connected with the heat exchange device. One end of the second air inlet pipe is connected with the heat exchange device and the other end is connected with the flow mixing device. According to the invention, with the system, the surge phenomenon of the turbocharging device can be avoided; and the gas kinetic force at the air inlet end of the turbine motor of the turbocharging device can be utilized to the greatest extent.

The invention relates to a blower comprising a high-speed permanent-magnet machine and a blower body, wherein the rotor of the high-speed permanent-magnet machine is fixedly connected with the impeller of the blower body; the rotor of the high-speed permanent-magnet machine and the impeller of the blower body can rotate synchronously; the impeller is arranged in the housing of the blower body; large blades and small blades are mounted on the impeller alternately; the housing of the blower body is connected with that of the high-speed permanent-magnet machine; an annular air cavity is formed in the housing of the blower body; an inlet duct communicated with the annular air cavity is arranged on the housing of the high-speed permanent-magnet machine; the housing of the blower body takes the shape of a volute; a swirl-shaped air passage is arranged in the housing of the blower body; one side of the swirl-shaped air passage is communicated with the annular air cavity; and the other side of the swirl-shaped air passage is communicated with a gassing bent pipe. The blower provided by the invention has the advantages that the reliability of the rotor is high; the mounting and the processing are simple; the size is small; the efficiency is high; the starting current is small; and the wind volume adjusting is convenient.