A power saving vacuuming pump system is based on complete-bearing-sealing and dry-large-pressure-difference root vacuuming root pumps includes an input valve at an input end of a vacuum space for receiving gas mixture of saturation water vapor and non-condensed air from a condenser of a power plant; a first root vacuum pump connected to the input valve for receiving gas mixture from the input valve and then compressing the gas mixture; a second root vacuum pump connected to the first root vacuum pump for receiving gas mixture from the first root vacuum pump and then compressing the gas mixture. Inner connection walls between the vacuum chamber and the two bearing chambers are installed respective bearings which are installed to be around the driving shaft, and thus all the vacuum chamber and the two bearing chambers are tightly sealed. The vacuum chamber is completely dried so as to prevent from internal emulsion.

A power saving vacuuming pump system is based on complete-bearing-sealing and dry-large-pressure-difference root vacuuming root pumps includes an input valve at an input end of a vacuum space for receiving gas mixture of saturation water vapor and non-condensed air from a condenser of a power plant; a first root vacuum pump connected to the input valve for receiving gas mixture from the input valve and then compressing the gas mixture; a second root vacuum pump connected to the first root vacuum pump for receiving gas mixture from the first root vacuum pump and then compressing the gas mixture. Inner connection walls between the vacuum chamber and the two bearing chambers are installed respective bearings which are installed to be around the driving shaft, and thus all the vacuum chamber and the two bearing chambers are tightly sealed. The vacuum chamber is completely dried so as to prevent from internal emulsion.

A control system for operating a plurality of air compressors collectively supplying compressed air to a manufacturing facility is disclosed which includes a demand forecast module configured to estimate the manufacturing facility's demand for the compressed air at a predetermined future time, a dynamic adjustment module configured to acquire a current air pressure from the manufacturing facility, the dynamic adjustment module combining the current air pressure and the estimated manufacturing facility's demand for compressed air to make a final forecast, and an optimization module configured to determine a target operating combination of the plurality of air compressors at the predetermined future time based on the final forecast and a current operating combination of the plurality of air compressors.

A control system for operating a plurality of air compressors collectively supplying compressed air to a manufacturing facility is disclosed which includes a demand forecast module configured to estimate the manufacturing facility's demand for the compressed air at a predetermined future time, a dynamic adjustment module configured to acquire a current air pressure from the manufacturing facility, the dynamic adjustment module combining the current air pressure and the estimated manufacturing facility's demand for compressed air to make a final forecast, and an optimization module configured to determine a target operating combination of the plurality of air compressors at the predetermined future time based on the final forecast and a current operating combination of the plurality of air compressors.

The invention relates to a method for controlling and/or monitoring a compressor system comprising several components, namely one or more compressors (11, 12, 13) and one or more peripheral devices (14 to 21), and also a control/monitoring unit (22), wherein the compressors (11, 12, 13) and peripheral devices (14 to 21) are arranged or connected in a certain configuration. The method distinguishes itself in that in a measured-value-capture step, measured values are captured within the compressor system or the components, in an allocation step, context information is allocated to the measured value or measured values in advance, simultaneously, or after the measured-value capture, in order to standardize the measured values, and in an evaluation step, the measured value or measured values standardized by the context information is used in a control, monitoring, diagnostics, or evaluation routine.

The invention relates to a method for controlling and/or monitoring a compressor system comprising several components, namely one or more compressors (11, 12, 13) and one or more peripheral devices (14 to 21), and also a control/monitoring unit (22), wherein the compressors (11, 12, 13) and peripheral devices (14 to 21) are arranged or connected in a certain configuration. The method distinguishes itself in that in a measured-value-capture step, measured values are captured within the compressor system or the components, in an allocation step, context information is allocated to the measured value or measured values in advance, simultaneously, or after the measured-value capture, in order to standardize the measured values, and in an evaluation step, the measured value or measured values standardized by the context information is used in a control, monitoring, diagnostics, or evaluation routine.

A multi-stage dry Roots vacuum pump, including a pump body, multi-stage Roots working units and a plurality of drive components. The pump body is provided with a plurality of independent working chambers, and airflow channels communicating the various working chambers; the airflow channels are communicated with outside; the Roots working units of each stage include driving Roots rotors and driven Roots rotors; the driving Roots rotors and driven Roots rotors are positioned in the working chambers; and the various drive components are respectively used for driving the driving Roots rotors and driven Roots rotors positioned in the various working chambers to rotate towards opposite directions at the same rotating speed. The Roots working units of various stages may be randomly distributed at various positions of the pump body on premise of ensuring that the airflow channels can communicate the working chambers of each stage.

A multi-stage dry Roots vacuum pump, including a pump body, multi-stage Roots working units and a plurality of drive components. The pump body is provided with a plurality of independent working chambers, and airflow channels communicating the various working chambers; the airflow channels are communicated with outside; the Roots working units of each stage include driving Roots rotors and driven Roots rotors; the driving Roots rotors and driven Roots rotors are positioned in the working chambers; and the various drive components are respectively used for driving the driving Roots rotors and driven Roots rotors positioned in the various working chambers to rotate towards opposite directions at the same rotating speed. The Roots working units of various stages may be randomly distributed at various positions of the pump body on premise of ensuring that the airflow channels can communicate the working chambers of each stage.

The invention relates to a method for controlling a rotary screw compressor, having at least a first and a second air-end, wherein both air-ends are driven separately from one another and speed controlled. According to the invention, the following steps are carried out: detection of a volume flow taken at the outlet of the second air-end; adjustment of the rotational speed of both air-ends, when the removed volume flow fluctuates in a range between a maximum value and a minimum value; opening of a pressure-relief valve, if the volume flow falls below the minimum value; and reduction of the rotational speed of at least the first air-end to a predetermined idling speed (V1.sub.L) to reduce the volumetric flow delivered by the first to the second air-end.

The invention relates to a method for controlling a rotary screw compressor, having at least a first and a second air-end, wherein both air-ends are driven separately from one another and speed controlled. According to the invention, the following steps are carried out: detection of a volume flow taken at the outlet of the second air-end; adjustment of the rotational speed of both air-ends, when the removed volume flow fluctuates in a range between a maximum value and a minimum value; opening of a pressure-relief valve, if the volume flow falls below the minimum value; and reduction of the rotational speed of at least the first air-end to a predetermined idling speed (V1.sub.L) to reduce the volumetric flow delivered by the first to the second air-end.