9results about How to "Improve vacuum efficiency" patented technology

The invention relates to the technical field of sealed storage equipment, and discloses a manual vacuumizing sealed tank which comprises a tank body, a cover body and a connecting piece, the cover body is in sealed connection with the tank body through the connecting piece, the connecting piece is provided with a vacuum piece, a pressure relief piece, an indicating piece and a limiting piece, the vacuum piece is used for vacuumizing the interior of the tank body, and the pressure relief piece is used for relieving pressure in the tank body. The structure that the cover body driven by rotation is matched with the control ring and the vacuum piece is adopted, traditional pressing type vacuum pumping design is replaced, the piston block can be driven to reciprocate through gear transmission by rotating the cover body, the air pumping stroke is stable, operation is labor-saving, the vacuum pumping efficiency is greatly improved, hand fatigue caused by repeated pressing is avoided, and the vacuum pumping efficiency is improved. Meanwhile, the limiting piece and the one-way ratchet ring are matched to achieve one-way rotation of the cover body, and the multiple sealing design of the one-way piece, the piston silica gel ring and the sealing gasket is matched, so that gas backflow is effectively prevented, the stable and reliable vacuum state in the tank is ensured, oxidative deterioration of stored objects can be better inhibited, and the shelf life is prolonged.

The utility model discloses a kind of molecular pump and diffusion pump vacuum pumping system for coating machine, including control valve device and pump device, control valve device includes valve body assembly and valve core assembly, valve body assembly includes vacuum valve cavity, vacuum valve cavity includes valve core assembly includes valve core piece and driving mechanism, one end of valve core piece and the cavity wall between vacuum valve cavity form first chamber, the other end and the cavity wall between vacuum valve cavity form second chamber, main vacuum port is communicated with first chamber, sub vacuum port is communicated with second chamber;In the initial stage of vacuumizing, the vacuum coating chamber is rapidly vacuumized by second chamber, energy-saving effect is played, vacuumizing time is shortened, production efficiency is improved, and the utility model can realize the control of multiple pump bodies by driving mechanism driving valve core piece, reduce the number of power source, reduce the cost of manufacture, and valve core piece is placed horizontally, reduce the height of the connecting position of connecting load vacuum chamber.

The invention relates to the technical field of mechanical engineering, and discloses an anti-cavitation test system and method for a thrust bearing under high temperature, heavy load and high rotating speed, and the system comprises a heavy load simulation part, a high temperature simulation part and a high speed dynamic simulation part which are arranged in sequence. The high-temperature simulation part comprises a high-temperature box, a closed test cabin is arranged in the high-temperature box, and the test cabin is communicated with the vacuumizing subsystem through an air pipe and is communicated with the oil injection subsystem through an oil pipe; one side of the high-temperature box is slidably and hermetically connected with a thrust shaft, the other side of the high-temperature box is rotatably and hermetically connected with a power shaft, and the thrust shaft and the power shaft are coaxially arranged; one end of the thrust shaft extends into the test cabin and is fixedly connected with a first clamp for mounting a test sample piece, and the other end of the thrust shaft is connected with the heavy load simulation part; one end of the power shaft extends into the test cabin and is fixedly connected with a second clamp for mounting a thrust ring, and the other end is in transmission connection with the high-speed dynamic simulation part. The cavitation problem in the testing process is solved through vacuum pumping-high temperature oil cooperative control, and accurate testing conditions are provided for bearing performance judgment and product development.

The utility model provides a kind of Roots vacuum pump and screw vacuum pump series system, including Roots vacuum pump, screw vacuum pump, condenser, first motor, second motor, water storage tank, electric cabinet, first electric control switch valve, second electric control switch valve, third electric control switch valve, electric control three-way valve, liquid level transmitter, pressure transmitter, first check valve and relevant pipeline;First motor is connected with Roots vacuum pump shaft, and second motor is connected with screw vacuum pump shaft;Liquid level transmitter is arranged at the side of water storage tank;Electric cabinet is respectively connected with first motor, second motor, first electric control switch valve, second electric control switch valve, third electric control switch valve, electric control three-way valve, liquid level transmitter, pressure transmitter communication connection.By using Roots vacuum pump and screw vacuum pump in series, the utility model not only can improve the vacuum degree of system and the stability of work and the efficiency of system vacuum extraction, but also can ensure normal work of work object while reducing system energy consumption.

This invention relates to the field of vacuum unit technology, and more particularly to a Roots screw vacuum unit. It includes a base frame, on which a screw pump, a motor, and a transmission box are mounted. A Roots pump housing is fixedly connected to the base frame and communicates with the screw pump. The transmission box has two output shafts, each fixedly connected to a rotating shaft. An impeller is fixedly connected to the rotating shaft, and symmetrically distributed scrapers are slidably connected to the impellers. A first elastic element is fixedly connected between each scraper and an adjacent impeller. Symmetrically distributed weights are slidably connected to both sides of each impeller. This invention uses scrapers to remove impurities adhering to the inner wall of the Roots pump housing, reducing the amount of impurities adhering to the inner wall, ensuring the stability of the gap between the impeller and the inner wall of the Roots pump housing, thereby reducing the probability of impeller wear, extending the disassembly and maintenance cycle of the device, and ensuring its normal operation.

The utility model discloses a thermoforming mould structure, which relates to the technical field of thermoforming processing, and comprises a mould, a bottom plate, a support piece and a vacuum interface assembly, the mould is arranged on the bottom plate, the bottom plate is provided with a through hole communicated with an inner cavity of the mould, and the support piece is arranged at the bottom of the bottom plate; the vacuum interface assembly is arranged at the bottom of the bottom plate, and a top opening of the vacuum interface assembly is matched with the through hole; when the mold is used, the mold is arranged on the bottom plate, the bottom plate is supported on equipment through the supporting piece, the through hole in the bottom plate is communicated with the inner cavity of the mold, and vacuum equipment is communicated with the inner cavity of the mold through the vacuum connector assembly. And the required vacuum pumping space is small, the vacuum pumping efficiency is higher, and the power requirement of the required vacuum equipment is lower.

The utility model relates to vacuum sealing machine technical field especially simple type plastic packaging bag vacuum sealing device, its technical scheme: including shell, the shell bottom is fixed with bottom shell, the vacuum pump is installed in the bottom shell, the shell upper end front side is equipped with the sealing cavity, the sealing cavity bottom rear side is equipped with the air extraction hole, the sealing cavity bottom and located the air extraction hole peripheral fixed sealing pad, the sealing cavity bottom front side is fixed with the electric heating wire, the sealing cavity is hinged with the flap, is provided with same sealing pad in the sealing cavity in the flap. The utility model sets up the transverse plate that stretches out in the annular sealing pad of air extraction, when air extraction, utilizes the transverse plate and inserts into the packaging bag, can quickly extract the gas in the packaging bag through the flow guide hole, effectively avoids the packaging bag opening to be extruded by the sealing pad, leads to the problem that the gas is difficult to discharge outward, improves the vacuumizing efficiency.

This utility model provides a vacuum tire vulcanizing machine, belonging to the technical field of tire vulcanizing equipment. It includes a tire mold, an upper crossbeam, a support plate, a lower base, a booster cylinder, a vacuum tube, and a vacuum pump. The upper crossbeam is positioned above the lower base, and the upper crossbeam and lower base define a receiving cavity. The booster cylinder is mounted on the lower base, and its drive rod extends into the receiving cavity and connects to the support plate, suitable for driving the support plate to move up and down within the receiving cavity. A first sealing element is provided on the outer side of the support plate, sealingly engaging with the inner wall of the lower base. The support plate, lower base, and upper crossbeam separate a vulcanizing chamber within the receiving cavity. The tire mold is placed within the vulcanizing chamber. One end of the vacuum tube extends into the receiving cavity and communicates with the vulcanizing chamber, while the other end of the vacuum tube is connected to the vacuum pump. This utility model, by setting up a vulcanizing chamber and providing seals at various points, achieves the necessary conditions for vacuum vulcanization, realizing the vacuum function of ordinary molds and improving the quality of tire vulcanization.

The utility model provides a vacuum system of a pressure steam sterilizer, which relates to the technical field of pressure steam sterilization, and comprises a sterilizer main body, a vacuum pump, a vacuum pump, a vacuum pump, a vacuum pump and a vacuum pump, and the sterilizer main body is internally provided with a sterilization chamber which is of a cylindrical cavity structure; a pipeline system is arranged behind the sterilization chamber; a first condenser is arranged behind the sterilization chamber and is connected with the sterilization chamber through a pipeline system; a jet flow valve is arranged at the rear part of the sterilization chamber, the jet flow valve is connected with the water storage tank through a first circulating pipe, a second circulating pipe is connected with a second condenser, and a circulating pump provides power to circulate and vacuumize water vapor, so that the steam in the sterilization chamber can be removed, and the vacuumizing efficiency is effectively improved; the service life of the equipment is ensured, and the problems that the vacuumizing efficiency is reduced and the service life of the equipment is influenced due to water in the sterilization chamber in the vacuumizing process when the vacuum system of the existing pressure steam sterilizer is used are solved.