49 results about "Roughing pump" patented technology

The invention provides a noise reducing enclosure for reducing the noise from a vacuum pump, e.g. a roughing pump of a high vacuum system, the vacuum pump having a long axis and the enclosure comprising a noise dampening material and being shaped to radially enclose the vacuum pump along its long axis and being axially open at each end. Airflow is permitted through the enclosure in use and optional integrated cooling means on the pump may assist cooling of the pump. The invention also provides an assembly of the pump and enclosure, a method for reducing the noise from a vacuum pump using the enclosure and a mass spectrometry system comprising: a mass spectrometer having one or more chambers therein which in operation are held under vacuum; and a vacuum pumping system for producing said vacuum, the vacuum pumping system comprising at least one vacuum pump which has a long axis and wherein the mass spectrometry system further comprises a noise reducing enclosure for radially enclosing the vacuum pump along its long axis, wherein the enclosure is axially open at each end.

The invention relates to a novel air pumping set which is applicable to the evacuating field. The novel air pumping set comprises a traction molecular pump, an arc titanium pump, a roughing pump and a fore pump, complements each other's advantages, and achieves the purpose of replacing the traditional air pumping set comprising a diffusion pump, a Roots pump and a roughing pump. Compared with the traditional air pumping set, the invention can save the air-pumping energy by 60-90%, eliminate the oil steam pollution in a vacuum chamber, and obviously improve the quality of vacuum products. The cost performance of the air pumping set is approximately 2-3 times better than that of the traditional high-vacuum air pumping set. Besides, the transpiration rate of the titanium materials of the air pumping set can be accurately controlled, and the titanium materials have a high use ratio and can be recycled. The roughing pump of the invention works in a very short time, and one roughing pump can be shared by multiple high-vacuum air pumping sets, thereby saving the device cost and the occupied space.

The invention relates to cleaning vacuum air exhaust technology for a large-sized space environmental simulator, which is mainly applied to research of large-sized space environmental simulators, and provides high vacuum test conditions for tests of spacecrafts. In order to obtain high vacuum of the large-sized space simulator, at first, a novel oilless rough pumping unit of a vacuum system exhausts air in a vacuum container in a vacuum manner so that the pressure in the vacuum container is lower than 10Pa, then a turbo molecular pump is utilized to exhaust air in a transitional manner until start vacuum degree of a main pump is achieved, finally, a low-temperature pump is utilized as the main pump for realizing high vacuum air exhaust, so that working vacuum degree of equipment is higher to 1.3X10-3Pa, and the working vacuum degree is maintained until a test is finished. The high vacuum air exhaust technology realizes that cleaning high vacuum for the large-sized space environmental simulator is obtained by the aid of completely oilless vacuum air exhaust equipment.

The invention discloses a clean vacuum pumping system and pumping method for a large space environment simulator. The clean vacuum pumping system comprises a rough pumping system, a magnetic suspension molecular pump system and a cryopump system, wherein the rough pumping system comprises a plurality of rough pumping units that are connected in parallel; each rough pumping unit consists of an oil-free dry pump and roots pump unit that is applied to an semiconductor industry; a PLC (programmable logic controller) and a host computer are adopted to automatically control and measure the overall process of vacuum pumping, so as to obtain and maintain high vacuum of the large space environment simulator; the magnetic suspension molecular pump system consists of magnetic suspension molecular pump, and oil-free dry pump and roots pump units that are applied to the semiconductor industry; the cryopump system adopts a cooling machine cryopump; and a preceding stage of the cryopump system adopts a unit consisting of a molecular pump and an oil-free dry pump and roots pump unit. The invention also discloses a corresponding pumping technology. As the oil-free vacuum pumping system and the reasonable pumping technology are adopted, the cleanness and high vacuum of the large space simulator are achieved.

The invention is applies to the technical field of vacuum acquisition and discloses an electric arc titanium pump and a vacuum air pumping group comprising the same. The electric arc titanium pump comprises a pump shell, a trapping plate, a cathode arc source member and a power supply, wherein the trapping plate is arranged on the inside wall of the pump shell, the cathode arc source member is fixedly arranged in the pump shell, and the pump shell and the cathode arc source member are in cylindrical shapes and are coaxially arranged; and the vacuum air pumping group comprises a vacuum chamber, wherein a molecular pump, a prepump, a roughing pump and the electric arc titanium pump are connected to the vacuum chamber. The electric arc titanium pump can be used for leading atoms steamed by the cathode arc source member to form an active film with even thickness and increasing the utilization rate of the cathode arc source member, thereby increasing pumping speed and air-pumping flow rate and reducing energy consumption and operation cost. The vacuum air pumping group can be used for replacing the current large-size diffusion pump with high energy consumption and high oil-vapor pollution and a Lobed pump air-pumping group in order to clean vacuum, save pumping energy consumption and reduce operation cost.

The invention provides an experiment system for space lower earth orbit plasma environment simulation. The experiment system comprises a microwave plasma source a, a source module a, a gate valve a, an experiment module door, an experiment module, a gate valve b, a source module b, a microwave plasma source b, a vacuum roughing pump set, a cryogenic pump b, a mobile platform, a cryogenic pump c, a cryogenic pump d and a cryogenic pump a, wherein one end of the experiment module is connected with the source module a through the gate valve a; the other end of the experiment module is connected with the source module b through the gate valve b; the microwave plasma source a is installed on the end surface of the source module a; the microwave plasma source b is installed on the end surface of the source module b; the cryogenic pump a and the cryogenic pump b are installed in the middle of the experiment module; the cryogenic pump c and the cryogenic pump d are installed at the lower part of the experiment module; the experiment module door is installed at one end of the interior of the experiment module; the vacuum roughing pump set is installed on the lower side of the other end of the experiment module; the mobile platform used for placement of testing equipment and instruments is installed at the lower part of the interior of the experiment module.

A vacuum pumping system and method in conjunction with a sputter reactor having a vacuum-pumped magnetron chamber sealed to the target backing plate. A main sputter chamber is vacuum sealed to the target front and cryo pumped. A bypass conduit and valve connect the magnetron and main chambers. A mechanical roughing pump connected to the magnetron chamber pumps the main chamber through the bypass conduit to less than 1 Torr before the bypass valve is closed and the cryo pump is opened and thereafter continues to pump the magnetron chamber to reduce the pressure differential across the target. A pressure differential switch connected across the bypass valve immediately open it whenever the pressure differential exceeds a limit, such as 20 Torr, for example when there is a leak or an electrical failure. The bypass conduit is also used in a venting procedure.

An ultra-high speed vacuum pump evacuation system includes a first stage ultra-high speed turbofan and a second stage conventional turbomolecular pump. The turbofan is either connected in series to a chamber to be evacuated, or is optionally disposed entirely within the chamber. The turbofan employs large diameter rotor blades operating at high linear blade velocity to impart an ultra-high pumping speed to a fluid. The second stage turbomolecular pump is fluidly connected downstream from the first stage turbofan. In operation, the first stage turbofan operates in a pre-existing vacuum, with the fluid asserting only small axial forces upon the rotor blades. The turbofan imparts a velocity to fluid particles towards an outlet at a high volume rate, but moderate compression ratio. The second stage conventional turbomolecular pump then compresses the fluid to pressures for evacuation by a roughing pump.

The invention provides a gas pipeline system of a reaction chamber and a control method of the gas pipeline system. The gas pipeline system comprises a roughing pump connected with a reaction chamber by a butterfly damper for exhausting gas in the reaction chamber; a turbine aerating pump connected with the reaction chamber for aerating the reaction chamber, wherein a gas cooling unit of the turbine aerating pump is communicated with the roughing pump; and a valve control unit for comparing the gas pressure in the gas cooling unit with gas pressure in the reaction chamber and closing a butterfly valve when the gas pressure in the gas cooling unit is more than that of the reaction chamber. In the invention, the roughing pump always exhausts gas in the gas cooling unit when working, can reduce gas pressure in the gas cooling unit and enable the gas pressure to keep balance with the gas pressure of the reaction chamber; the valve control unit compares the gas pressures, controls opening or closing of the butterfly valve, thereby effectively preventing the cooling gas from being reversely filled to the reaction chamber.

The invention provides an automatic vacuum evaporation method which adopts a vacuum evaporator to perform vacuum evaporation in a full-automatic manner, and comprises the following steps: S1, adopting a rough suction pump to vacuumize the interior of a cavity of the vacuum evaporator; S2, turning off the rough suction pump, and continuing to vacuumize by adopting a fine suction pump; S3, during vacuumizing in the step S2, adopting a heating lamp in a cavity of the vacuum evaporator to begin to preheat so as to remove moisture on the surface of the workpiece product; S4, preheating the evaporation coating material in a crucible while the heating lamp in the step S3 starts to heat, so that the granular evaporation coating material is fused into a whole; S5, starting an ion source device, and performing physical bombardment on the surface of the workpiece product; and S6, for the evaporation coating material fused into a whole in the crucible, changing the evaporation coating material into a liquid state from a solid state and then into a gas state by utilizing the electron beam or thermal resistance evaporation principle, enabling gas molecules of the evaporation coating material to reach the surface of the workpiece, and forming a coating film on the surface of the workpiece after solidification nodules.

The invention discloses a vacuum pumping pipeline device of a spacecraft environment simulation test equipment, comprising: a vacuum rough pumping pipeline [3] of a spacecraft space environment simulator [5] connected in series with a liquid nitrogen oil retaining cold trap [2] ]; there is a liquid nitrogen pipeline [1] in the liquid nitrogen oil-retaining cold trap [2]; according to the present invention, on the liquid nitrogen pipeline [1] in the liquid nitrogen oil-retaining cold trap [2], a roadside The liquid nitrogen pipeline [21] is connected in series with the low temperature shut-off valve [22]; the low temperature shut-off valve [24], [twenty three]. The invention solves the problem of oil return from the mechanical vacuum pump of the rough vacuuming pipeline of the spacecraft environmental simulation test equipment, and achieves the beneficial effects of improving test reliability and effectively preventing the vacuum pump oil from polluting the spacecraft.

The invention discloses an electronic/ion induced desorption yield integral test device and method. The device comprises a standard vacuum chamber, a vacuum test cavity, an electronic source/ion source, an ion pump, a roughing pump, a second turbine molecular pump, a first turbine molecular pump, a high-purity standard gas input pipeline, a pressure intensity test system, a diaphragm type vacuum gauge, a temperature sensor, a refrigerating system and a heating disc; the second turbine molecular pump and the high-purity standard gas source input pipeline are communicated with an inlet of the standard vacuum chamber; an outlet of the standard vacuum chamber is communicated with the vacuum test cavity; a sample support frame for placing samples is arranged in the vacuum test cavity; the electronic source/ion source directly faces to the samples on the sample support frame; the ion pump, the roughing pump and the first turbine molecular pump are respectively communicated with the vacuum test cavity. The device and the method have the advantages that the electronic induced desorption yield test and ion induced desorption yield test can be realized; the test temperature region range is wide.

The invention discloses a twenty-four-station vacuum degasser, which includes a pump frame and an equipment operation table, the pump frame is installed in parallel at the side end of the equipment operation table, and the inner side of the pump frame is provided with Rough pump, rough vacuum pump and fine vacuum pump, the upper end of the pump frame is provided with a vacuum buffer tank; the equipment operation table is provided with a vacuum control valve group, a riveting module and a pneumatic hydraulic platform. The twenty-four-station vacuum degasser controls and detects the vacuum state in the vacuum buffer tank through the man-machine control panel, and displays the internal state through the vacuum display screen. When the vacuum state is reached, the gas-hydraulic table is controlled through the man-machine control panel Work, push the riveting module to work; the overall use of three-stage vacuum pumping, such as rough pumping front pump, rough vacuum pump and fine vacuum pump, ensures the vacuum pumping effect.

A gas amount measuring device including a vacuum container, a first pipe, an air release valve being attached to the first pipe, a second pipe, a calibration gas generator being attached to the first pipe, a third pipe, a vacuum gauge, a first valve, a leak valve, a second valve, a turbomolecular pump, a third valve, and a roughing pump being attached to the third pipe in order from a vacuum container side, a first bypass pipe connecting the third pipe between the vacuum container and the first valve to the third pipe between the leak valve and the second valve, a fourth valve being attached to the first bypass pipe, and a second bypass pipe connecting the third pipe between the leak valve and the second valve to the third pipe between the third valve and the roughing pump, a fifth valve being attached to the second bypass pipe.

The invention discloses a device and a method for measuring the material outgassing rate in dual test chambers. The device comprises a high vacuum chamber, a first test chamber, a first valve, a second test chamber, a second valve, an ultra high vacuum chamber, a roughing pump unit, a precision pump, a first vacuum gauge, a second vacuum gauge and a third vacuum gauge. Due to the addition of the second vacuum gauge, when the first valve or the second valve is opened, the pressure in the first test chamber and the second test chamber can be measured at the same time. Time-induced errors are eliminated. The mechanical action of changing a gas circuit during actual measurement is not needed, which avoids the disturbance of the valve switching on vacuum readings, and improves the measurement efficiency.

The invention relates to the field of vacuum pump testing, in particular to a multifunctional vacuum pump testing cover comprising a shell, a water cooling pipe, a heating wire and a reflecting cover;the water cooling pipe is arranged outside the shell, the reflecting cover and the heating wire are arranged inside the shell, an openable first sealing cover is arranged at one end of the shell, andthe other end of the shell is closed and is provided with a to-be-tested pump port; and the shell is provided with an air inlet, a temperature measuring port, a pressure measuring port, a PIV observation port and a plurality of air pumping ports, wherein the air pumping ports comprise a main air pumping port connected with a main pump and a rough pumping port connected with a rough pumping pump.The multifunctional vacuum pump testing cover integrates a series of functions of heating, cooling, air exhaust, air intake, pressure measurement, temperature measurement and PIV observation and can enable the gas environment in the vacuum pump testing cover to meet the requirement for the performance test of the vacuum pump; and simultaneously, the stability and the accuracy of the test result are improved.