Provided herein is a mechanical resonant system, comprising a frame; at least one pump disposed on the frame; one or two masses coupled to the frame by a first plurality of resilient members; and at least one voice coil actuator disposed within the frame and coupled to the at least one pump or to the one or two masses; wherein when the system comprises two masses, a second plurality of resilient members couple the masses to each other. Also provided are methods for using these mechanical resonant systems to evacuate a chamber, to compress air, or sense changes in pressure.

The device consists of two separate parts: a stationary unit (12) which contains a motor (16) and vacuum pump (14), and a mobile head (20) with a power-supply switch for the motor and an aspirating nozzle designed to fit over the valve (32) in the lid of an airtight container (28, 30). The mobile head connects to the stationary unit with two flexible coaxial spiral cords, consisting of a hose (22) linking the vacuum pump and aspirating nozzle, and a power cord (36) linking the switch to the electrical motor. Both lines can easily be stretched together from the storage position, in which the mobile head sits on the stationary unit, to active mode, in which the suction effect keeps the mobile head coupled to the container.

The device consists of two separate parts: a stationary unit (12) which contains a motor (16) and vacuum pump (14), and a mobile head (20) with a power-supply switch for the motor and an aspirating nozzle designed to fit over the valve (32) in the lid of an airtight container (28, 30). The mobile head connects to the stationary unit with two flexible coaxial spiral cords, consisting of a hose (22) linking the vacuum pump and aspirating nozzle, and a power cord (36) linking the switch to the electrical motor. Both lines can easily be stretched together from the storage position, in which the mobile head sits on the stationary unit, to active mode, in which the suction effect keeps the mobile head coupled to the container.

The present invention provides an energy-efficient method and apparatus that can achieve exhaust gas abatement with a minimum use of diluent nitrogen gas. More specifically, the present invention is directed to a method and apparatus for exhaust gas abatement under reduced pressure, in which an exhaust gas supplied from an exhaust gas source via a vacuum pump is decomposed by heat of a high-temperature plasma under a reduced pressure.

Provided is a vacuum pump that can realize energy conservation when performing abatement of exhaust gas.

A vacuum pump that sucks in and exhausts exhaust gas includes a motor serving as a drive source, and a first controller that controls driving of the motor. The first controller monitors a state of the motor, and in a case in which the state of the motor is a specific state excluding when starting up and when stopped, outputs a specific signal (process signal) to an external entity.

A vacuum pump system includes a first vacuum pump and a second vacuum pump connected to an exhaust port of the first vacuum pump. The second vacuum pump has a pump portion and a trap portion. The pump portion has a rotor. The trap portion is configured such that a reaction product generated from gas guided to an internal space from the exhaust port of the first vacuum pump by suction by the pump portion is accumulated thereon.

A piston pressure device includes a gas concentration-regulating piston pressure device and a high temperature autoclave. In the gas concentration-regulating piston pressure device, the proportion and concentration of corrosive gases can be accurately adjusted, intermediate gases can be stored and filled into the high temperature autoclave according to experimental needs, and an actual corrosion process in oilfield is accurately simulated. Meanwhile, the corrosive gases can be supplemented in real time during the experiment, and dynamic gas distribution in a high-temperature high-pressure corrosion experiment process is realized. The present invention has the advantages as follows: the piston pressure device is resistant to high temperature and high pressure, corrosion-resistant, simple in structure and convenient to operate; the concentration and proportion of the corrosive gases are accurately controlled to be invariable in the high-temperature high-corrosion experiment process; and reliability of high-temperature high-pressure corrosive experimental results is increased.

A vacuum pump system comprising a main vacuum pump that is connected to a chamber that is to be evacuated. An auxiliary pump is connected to an outlet of the main vacuum pump. Furthermore, a sealing gas supply device is connected to the main vacuum pump. The sealing gas supply device is switched on and off with the aid of a control device as a function of a predetermined control variable. Additionally, a method for controlling the vacuum pump system.

A vacuum pump system comprising a main vacuum pump that is connected to a chamber that is to be evacuated. An auxiliary pump is connected to an outlet of the main vacuum pump. Furthermore, a sealing gas supply device is connected to the main vacuum pump. The sealing gas supply device is switched on and off with the aid of a control device as a function of a predetermined control variable. Additionally, a method for controlling the vacuum pump system.

A vacuum pump includes a motor, a pump coupled to the motor to receive torque therefrom, and a trestle including an inlet port, an outlet port, and a fluid pathway therebetween, the outlet port being fluidly connected to the pump. The vacuum pump also includes a first valve positioned within the fluid pathway and adjustable between an open state, in which an airflow induced by the pump is drawn through the inlet port, and a closed state, in which a reverse airflow through the inlet port is prevented, and a second valve positioned within the fluid pathway in series with the first valve and adjustable between an open state, in which the airflow induced by the pump is drawn through the inlet port, and a closed state, in which the reverse airflow through the inlet port is prevented when the motor is deactivated.