101 results about "Rotary vane pump" patented technology

A surgical instrument (e.g., endocutter, grasper, cutter, staplers, clip applier, access device, drug/gene therapy delivery device, and energy device using ultrasound, RF, laser, etc.) may benefit from having a plurality of hydraulically actuated subsystems (e.g., severing, stapling, articulation, locking/unlocking, lockout enabling/disabling, grasping, etc.) supplied with hydraulic power from a trigger actuated rotary pump (e.g., lobe pump, rotary gear pump, internal rotating gear pump, flexible vane rotor pump, rotary vane pump). Thereby, an available amount of mechanical advantage available at a firing trigger may be optimally distributed to various end effector components, perhaps sequenced by an electroactive polymer or piezoelectrically actuated function switch block.

The invention discloses charge-discharge test equipment for a medium material. The charge-discharge test equipment comprises a vacuum system, a charge-discharge system and a potential test system, wherein the vacuum system comprises a vacuum tank, a mechanical pump (3), a diffusion pump (2), a multistage rotary vane pump (1), a valve, a sealing pipeline and a workbench; the charge-discharge system comprises an electronic gun (6) and a sample (11) mounting system; the potential test system comprises a potentiometer (9) and a micro current meter (14); a vacuum valve (4) and a vacuum gauge (5) are arranged in the vacuum tank; in addition, a baffle valve A (15), a baffle valve B (16) and a copper plate (13) are further provided; in conclusion, the equipment measures the attenuation relation of surface potential with time by using a surface potential probe, and the conductivity of the sample can be calculated according to the measured sample surface attenuation potentials at different moments. The conductivity test equipment provided by the invention is suitable for estimating deep charging hazard, and can supply valuable engineering data to protection of deep charging and discharging effect.

The invention relates to an evaporation coating device and an air extracting process thereof. The evaporation coating device adopts a set of an electric arc titanium pump, a traction molecular pump and a prepump with parallel air extracting to replace the seat of a conventional diffusion pump, a roots pump and a slide valve pump (or rotary vane pump) with series air extracting, wherein an active gas with high vacuum can be fast extracted by the electric arc titanium pump; an inert gas with high vacuum and a middle vacuum gas can be fast extracted by the traction molecular pump set. Because the electric arc titanium pump and the traction molecular pump are both low energy consumption pumps, the electric arc titanium pump mainly runs in a refined extracting stage and a coating stage and the running time is less than 1/3 of the entire air extracting time, air extracting energy consumption can be greatly reduced by the evaporation coating device. In addition, the set of the conventional diffusion pump, the roots pump and the slide valve pump does not have oil vapor pollution so that the oil vapor pollution of a conventional evaporation coating device is also eliminated by the evaporation coating device.

The invention provides a brazing process of a ceramic vacuum pipe with diameter greater than 300mm and a device, comprising the following steps: firstly, cleaning the ceramic pipe and a titanium ring, then putting them into a vacuum furnace, conducting temperature-rising weld under vacuum condition, providing shielding gas after welding, taking the ceramic pipe out from the furnace, and completing the butt-weld of two ceramic vacuum pipes. The device provided by the invention comprises a first-class mechanical rotary vane pump, a second-class Roots pump, and a third-class oil diffusion pump; the pumps are arranged in serial, meanwhile, the device is provided with a pipeline for transmitting high-purity inert gas (such as nitrogen and argon) into the furnace. The advantages of the invention are as follows: the brazing process of the ceramic vacuum pipe with diameter greater than 300mm and the device is provided, the vacuum leak rate at welded joint of the welded ceramic pipes is less than 5 * 10-12Pa. M3 / s, and no crack exists on the ceramic pipe.

A rotary vane pump is provided that provides an improved fluid replenishment and pressure relief system within a rotary vane pump system. A system, containing a rotary vane pump containing at least one relief cut between the housing and the rotor, functions to relieve fluid pressure normally found between the housing and the rotor. The fluid leaks from areas such as the rotational clearance required between the rotor and an inner wall of the housing. The system includes a reservoir in fluid communication with the relief cut wherein fluid leaks are then retained within the reservoir. A fluid distribution manifold employing a plurality of check valves, each corresponding to a respective chamber within the rotor, provides a controlled fluid feed from the reservoir to the rotor thereby balancing the fluidic pressure existing between the radially innermost ends of the vanes and the radially outermost ends of the vanes.

The invention belongs to the technical field of film material preparation and particularly relates to a device and method for preparing a combined film material warehouse. The device disclosed by the invention is composed of a combined pulse laser coating machine, a laser, a computer, a compound molecular pump and a double-stage rotary vane pump, wherein the combined pulse laser coating machine is composed of an RHEED (Reflection High-Energy Electron Diffraction) electronic gun, a pre-pumping pipeline, a stepping motor, a target selection swing mechanism, an RHEED fluorescent screen, a CCD (Charge Coupled Device) image sensor, a laser window, a substrate frame, a mask frame, a servo motor and a vacuum chamber, wherein the target selection swing mechanism is used for controlling target switching. A method provided by the invention comprises the steps of designing a mask with a corresponding structure according to a deposition film, and precisely and controllably depositing a multi-element component film warehouse through the combined pulse laser coating machine. The device disclosed by the invention is simple and convenient to operate, modularized in structure, convenient to maintain, capable of filling up the blank of the device for depositing the film material warehouse at high controllability at present and providing a novel feasible method for preparing the film material warehouse and wide in application prospect.

The invention discloses a molecular-distillation purification method of celery seed oil and a purification device thereof. The purification device consists of a hot oil machine, a cold water machine, a material tank, a thermostatic bath, a grade-I evaporator, a grade-II evaporator, a cold well, a water ring pump, a rotary vane pump, a diffusion pump and a controller, wherein the hot oil machine is communicated with the grade-II evaporator through a hot oil pipe; one end of the cold water machine is communicated with the grade-II evaporator through a first cooling water pipeline; the other end of the cold water machine is communicated with the cold well through a second cooling water pipeline; and the grade-I evaporator is communicated with the grade-II evaporator through a vacuum cavity pipeline and a second material conveying pipeline. The molecular-distillation purification method comprises the steps of: first, preparation work; second, the process of distillation separation; and third, shutdown. The method and the device have the beneficial effects of greatly enhancing the production efficiency, lowering the cost of purifying the celery seed oil, improving the working environment of workers, truly raising the automation control degree in purification of the celery seed oil, and being high in reliability and remarkable in practical effect.

A magnetic rotary vane pump is disclosed which includes a rotor disposed within a casing that comprises a cavity having an inlet and an outlet. The rotor includes at least one radial slot and at least one vane carried by the radial slot. The vane includes an inner edge directed towards a central axis of the rotor and an outer edge directed towards the casing. The inner edge of the vane is connected to a first magnet. The slot in the rotor includes an inner wall that abuttingly engages or faces the inner edge of the vane when the vane is fully received within the slot. The inner wall of the slot is connected to a second magnet. The two magnets are arranged so that like pole of the magnets face each other thereby biasing the vane out of the slot and against the inner wall of the casing as the rotor rotates. Accordingly, no spring or pin is required to bias the vane outward against the casing or into recesses or slots disposed in the casing wall. The resulting design may be operated faster than conventional vane pumps and with less lubrication or no lubrication than conventional vane pumps.

The invention discloses a molecular pump unit pre-evacuation and molecular pump leak detector integrated system, including a vacuum chamber, the vacuum chamber is connected to a product vacuum valve through a pipeline, the product vacuum valve is connected to a high vacuum baffle valve through a pipeline, and a high vacuum baffle The valve is connected to the high-vacuum solenoid through the pipeline, the high-vacuum solenoid is connected to the molecular pump through the pipeline, the molecular pump is connected to the manual flapper valve through the pipeline, the manual flapper valve is connected to the electromagnetic charging valve through the pipeline, and the electromagnetic charging valve is connected to the front rotary vane pump, molecular pump The pipeline between the manual flapper valve is connected to the leak detection valve through the pipeline, and the leak detection valve is connected to the leak detector through the pipeline; the pipeline between the molecular pump and the manual flapper valve is connected to the bypass pre-pumping flapper valve through the pipeline, The bypass pre-extraction baffle valve is connected to the pipeline between the high vacuum baffle valve and the high vacuum solenoid valve through a pipeline. The invention solves the problems of long evacuation and leak detection reaction time in the manufacturing process of the low-temperature pressure vessel and the problems of energy consumption and man-hour waste in the interlayer high-vacuum evacuation process.

A compact suction and separation device is shown and described. The suction and separation device includes a pump and a separator. The pump includes a vertically oriented rotary vane pump comprising a suction inlet and an exhaust outlet. The separator includes a collector configured to receive combinations of solids, liquids and air. The separator separates solids and/or liquids from the air. Air from the separator is routed from an air discharge into the suction inlet of the pump. Solids and/or liquids are drained from a liquids/solids discharge of the separator. The separator may be gravity-based or centrifuge-type separator driven by the pump motor.

The invention relates to a vacuum pumping device for an interlayer of a cryogenic insulation cylinder, which belongs to the technical field of cryogenic insulation vacuum. The vacuum pumping device is mainly technically characterized by comprising the cryogenic insulation cylinder, a heating oven, an internal air circulating fan, a combustion machine, a heating branch pipe, an exhaust branch pipe, an internal heating main pipe, an external exhaust main pipe, a nitrogen heating device, a nitrogen displacement valve, a pneumatic flapper valve I, a pneumatic flapper valve II, a diffusion pump, a pneumatic flapper valve III, a rotary vane pump and a Roots pump, wherein the internal air circulating fan is used for introducing heated high-temperature air into the interlayer of the cylinder. The two surfaces of an outer cylinder body and an inner liner are heated simultaneously, so that hydrogen, helium and other low molecular weight gas molecules, water molecules and the like, which are adsorbed in a heat insulation material in the interlayer, can be activated, the gas release speed of the interlayer is enhanced, and the vacuum pumping speed of the interlayer is effectively improved. The vacuum pumping device has the advantages of reasonable structure, safety and convenience in use, high vacuum pumping degree, no re-bounce of vacuum degree, long holding time and the like.

A rotary vane pump, including a housing within which is rotatably mounted a rotor having a plurality of slots therein with a vane positioned for sliding movement within each of the slots. An access port is formed in the housing communicating with the rotor at a reference position in relation to the slots. The access port is sized to permit alignment of any one of the slots with the access port by rotating the rotor, maintaining the vane within the aligned one slot and at a datum within the slot, and permitting entry into the access port of an aligned slot of a stylus having a predetermined length in relation to the datum for determining the length of the vane. A determination of whether wear to the vane has met or exceeded a predetermined amount can be determined by reference to a portion of the stylus exterior to the access port.

A pump assembly (100) having a pump housing (206 and 208) and a rotor (222) rotatingly disposed within the housing, the rotor having a plurality of slots (226). The pump assembly includes a plurality of vanes (224), each vane moveably disposed in one of the plurality of slots, and an input shaft (228) coupled to the rotor for applying a torque to the rotor. The pump assembly (100) also includes a prime mover (400) for generating a torque and a magnetic coupling unit (300) for magnetically transferring the torque generated by the prime mover to the input shaft. The vanes may have a leg (256) which extends radially inward from a blade (254). The rotor and input shaft may be integrally formed.

The invention provides a rotary vane pump/motor with simple structure, which includes vanes, synchronous claws, runners, power shafts, synchronous chute, shroud, casing and inlet and outlet ports. A plurality of self-rotating blades are installed on the runner connected to the power shaft, and the ratio of the rotation speed of the blades to the speed of the runner is 1:2. The invention is applicable to various fluids, the working conditions are reversible, the fluid flow direction is reversible, the structure is simple, and the energy efficiency is high. Through the difference design of the blade and the guide structure, it can be used as the design prototype of the water pump, the water turbine, the air pump/motor, and the hydraulic pump/motor respectively. .

A heating system for the jet head of ink jet plotter is composed of a water storage unit able to heat the water in it, a water tube of jet head, a rotary vane pump for pumping the hot water into said water tube of jet head in order to heat jet head, a liquid level sensor, and a diaphragm pump for automatically filling water in said water storage unit.

The present invention relates to a brake vacuum auxiliary device for automobiles. The brake vacuum auxiliary device for automobiles comprises a monoblock rotary vane pump, an exhaust filtering and oil feeding device, a tee joint connected with a booster assembly, a vacuum switch and a power controller. The monoblock rotary vane pump is connected with the exhaust filtering and oil feeding device, and the monoblock rotary vane pump is connected with the tee joint by a vacuum pipe provided with a check valve. One end of the power controller connected with a power supply is connected with a motor, and the other end is connected with the vacuum switch arranged below the tee joint. The device is an engine capable of being separated from an automobile, having vacuum stability functions. The device can provide the brake vacuum booster with a reliable, stable and independent vacuum source, and make the brake vacuum booster constantly lie in a reliable work state.