56 results about "Bernoulli's principle" patented technology

The invention relates to the technical field of numerical control milling machines, and discloses a high-precision numerical control milling machine based on a self-adaptive adjusting system.The high-precision numerical control milling machine comprises a supporting rack, a mounting frame is fixedly connected to one side of the top of the supporting rack, a connecting frame is mounted on the outer side of the mounting frame, and a main shaft is movably connected to a through hole in the top of the connecting frame through a bearing; a driving rotary disc is fixedly connected to the top end of the main shaft, a driving block is fixedly connected to the external eccentric position of the driving rotary disc, and a movable frame is slidably connected to the outer surface of the driving rotary disc. By applying the Bernoulli principle and based on the inherent characteristics of fluid, chip collection and main shaft machining loads are dynamically balanced in the machining process, the machining precision and surface quality are remarkably improved, the chip adhesion rate of the tool and the surface of a workpiece is greatly reduced, and the service life of the tool is remarkably prolonged. By optimizing the airflow distribution of the scrap suction pipeline, the problems of airflow dead angles and reentrainment of dust easily caused by traditional fixed dust removal are effectively avoided.

The invention provides a downburst maximum horizontal wind speed diagnosis method and system. The method comprises the steps that the vertical speed and the jet radius of downburst vertical jet airflow in a high-voltage transmission corridor area are obtained; constructing a downburst impingement jet model based on the Bernoulli principle, and obtaining a static pressure difference parameter; establishing a momentum equation based on a momentum conservation law and the static pressure difference parameter; a mass conservation equation is established based on the jet radius and the mass conservation law, and the horizontal flow thickness is obtained; obtaining a diagnosis model formula of the maximum horizontal wind speed according to the horizontal flow thickness and the momentum equation; and determining an efficiency coefficient according to the turbulence energy loss, correcting the diagnosis model formula based on the efficiency coefficient, and obtaining a corrected diagnosis formula of the maximum horizontal wind speed, thereby realizing accurate estimation of the downburst maximum horizontal wind speed, and providing key dynamic support for disaster prevention and reduction of power grid facilities.

A large-scale, modular, wind power generating structure and system involving a toroidal or ovoidal shaped wind amplification structure / module that can be stacked vertically to form a tower that passively accelerates a wind flow that moves around each of the modules due to the Bernoulli Principle. Each amplification level includes a plurality of vertical axis wind turbine and generator assemblies, fairings, and vanes that form a synergistic system wherein the efficiency of the vertical axis turbine and generator assemblies and the amount of energy that can be produced per module are substantially improved compared to the turbine assemblies operating outside the integrated and amplified wind system.

The application discloses a kind of pharmaceutical container sorting device and production system, for sorting pharmaceutical container, including the rotating mechanism of symmetrical distribution, rotating mechanism is synchronous rotation or synchronous stop under working condition, rotating mechanism is evenly distributed with the accommodation structure of circumferential along the periphery, container at sorting station is between the accommodation structure of two rotating mechanisms, rotating mechanism is provided with the gas path connecting structure connected to accommodation structure, pharmaceutical container sorting device further includes the gas supply mechanism of being connected with gas source and being arranged close to rotating mechanism, gas supply mechanism is used to provide compressed gas to accommodation structure through gas path connecting structure selectively.This sorting device realizes container sorting based on Bernoulli principle by compressed air blowing, and the pressure of compressed air can reach four to six atmospheres, so the sealing requirement is lower, even if there is air leakage, there is still enough suction to avoid the problem of broken bottle, and slightly air leakage can greatly reduce the processing and assembly difficulty.

The invention relates to the technical field of climate adjusting devices, in particular to a Bernoulli principle climate adjusting device which comprises a base, trusses and an office area are arranged at the top of the base, power generation mechanisms are arranged in the trusses, an iron ball wind damper mechanism is installed between the trusses, and a water spraying mechanism is installed at the top of the base. The power generation mechanism comprises a straight barrel, a stable cross beam is fixedly connected into the inner wall of the straight barrel, and a fan is fixedly connected to the bottom of the stable cross beam. According to the climate adjusting device, by means of the Bernoulli principle, through cooperation of the power generation body mechanism and an iron ball wind resistance device, air flow can be effectively promoted, and peripheral wind power generation equipment is driven to operate; meanwhile, the ground surface temperature is adjusted, heat energy generated by power generation and power utilization is reduced, electric energy is saved, the water spraying mechanism can reduce radiation of sunlight to the ground surface through water spraying, dust can be taken away in the air rising process, and the environment quality is improved.

The invention relates to the technical field of chemical synthesis, and discloses an automatic sampling device in a chemical synthesis process, the automatic sampling device comprises a reaction furnace body, the inner side of the reaction furnace body is fixedly provided with two fixed cylinders, the interiors of the fixed cylinders are slidably connected with pistons, the outer sides of the pistons are fixedly connected with movable rods, and the movable rods are fixedly connected with the fixed cylinders. And the outer surface of the fixing barrel sequentially communicates with an air inlet pipe and a conveying pipe, first one-way valves are installed in the conveying pipe and the air inlet pipe correspondingly, and one end of the conveying pipe communicates with a mounting pipe. The sampling mechanism is arranged on the side surface of the reaction furnace, and a driving disc is used for driving a hinge rod to reciprocate, so that a piston reciprocates along the interior of a fixed cylinder, and gas is generated in a conveying pipe. The liquid in the reaction furnace is collected into the collecting bottle according to the Bernoulli principle, so that the sampling efficiency is remarkably improved, the sampling time is shortened, meanwhile, the interference to the internal environment of the reaction furnace is reduced, and the continuity and stability of the reaction process are ensured.

The invention discloses a Bernoulli principle-based 3D uniform temperature plate, which comprises a body, a steam cavity is arranged in the body, the steam cavity is divided into a core area and a non-core area, a communication unit is arranged on the body, a steam channel is arranged in the communication unit, and two ends of the steam channel are respectively communicated with the core area and the non-core area of the steam cavity. One end, corresponding to the core area, of the steam channel is venturi-shaped along the main stream direction of steam. The communicating units are arranged between the adjacent steam channels, a local low-pressure area is generated by utilizing the gradually-shrinking-gradually-expanding cross section during transverse migration of steam, a suction / drainage effect is formed on main stream steam, an effective flowing path is shortened, the total steam pressure drop is remarkably reduced, the total thermal resistance of the 3D uniform-temperature plate can be reduced by 20% or above, the in-plane temperature uniformity is improved, and the service life of the 3D uniform-temperature plate is prolonged. The method is suitable for high-heat-flux scenes such as communication equipment and AI computing terminals.

The invention belongs to the technical field of range hoods, and discloses a novel range hood, which comprises a conical fan pipe, an exhaust fume collecting hood and an oil collecting cavity, and the conical fan pipe comprises a coanda effect, a venturi tube effect and a Bernoulli principle. According to the range hood, airflow separation loss is reduced through the coanda effect, the conical pipe is combined with the double diagonal flow fans, airflow speed and pressure distribution are optimized through the Venturi pipe effect, working points of the serial diagonal flow fans are accurately matched, and compared with a traditional range hood, the range hood has the advantage that the oil smoke adsorption and conveying efficiency is remarkably improved. Oil molecules are efficiently separated through rotational flow of the oil collecting cavity by means of centrifugal force, centralized collection of oil stains is achieved by matching with the design of the oil discharging pipe, and oil-smoke separation efficiency is improved. The connecting assembly achieves stable assembly of the functional modules, the integrity of the system is ensured, convenience is provided for disassembly and cleaning of the diagonal flow fan, the conical pipe and other components, practicability and maintenance convenience are both considered, and actual application and operation are facilitated.

The utility model discloses a pipeline flow velocity control structure convenient to fill, which relates to the technical field of pipeline flow velocity control and comprises a pipeline, a horn mouth is mounted on the bottom wall of the pipeline in a penetrating manner, an anti-slip connector is mounted at the bottom end of the horn mouth, a valve component is mounted at one end of the pipeline, and a valve is mounted at the other end of the pipeline. The valve assembly comprises a guide pipe installed at one end of the pipeline through a bolt, a rotating shaft is installed on the inner side of the guide pipe, a control motor is installed at the top of the guide pipe, and the output end of the control motor is connected with the top end of the rotating shaft. The trumpet-shaped nozzles are installed at the bottom of the pipeline, the trumpet-shaped nozzles are large in upper portion and small in lower portion, fluid is guided to move, according to the Bernoulli principle, due to the fact that the trumpet-shaped nozzles are large in upper portion and small in lower portion, the flow speed of the upper portion is low, but the flow speed of the fluid is increased after the fluid enters the small-diameter portion. Therefore, the fluid can be quickly output and filled.

The invention relates to a system consisting of two reservoirs with cuboid structures, a water pump integrated with a temperature control function and a plurality of pipelines. A height-adjustable cylindrical overflow pipeline is arranged in the center of the bottom face of the reservoir, a water inlet and a water pipe channel are arranged at the position, close to the bottom, of the side face of the reservoir, and different calibers can be switched to meet different flow speed adjusting requirements. And the water pipe channel of the upstream reservoir is connected with a water pump integrated with temperature control, and is connected with the downstream reservoir after passing through the cooling module. The device has the technical effects that in the operation process, the liquid level height is controlled by adjusting the overflow pipelines of the upstream and downstream reservoirs, so that the liquid flow rate during operation of the device is determined. And the pressure intensity at the module can be influenced by adjusting the liquid level height difference. According to the Bernoulli principle, it is ensured that the static pressure and the flow speed at the modules can be independently adjusted.

The application belongs to the technical field of semiconductor and discloses a multifunctional semiconductor cavity type processing equipment, which comprises a bearing mechanism, the bearing mechanism comprises a shell, opposite sides of the shell are fixedly connected with communication ports penetrating through the side walls, a first venturi, a second venturi and a third venturi are fixedly connected in sequence from left to right between the two communication ports, and the throats of the first venturi, the second venturi and the third venturi are fixedly connected with vertical pipelines in communication with the interiors thereof. In the application, when a liquid pump drives the liquid in the first venturi, the second venturi and the third venturi to flow, according to Bernoulli's principle, the liquid levels in the three vertical pipelines will drop by different heights, at this time, the center disc, the first supporting ring and the second supporting ring are arranged in an ascending ladder shape from inside to outside, at this time, wafers of different sizes will fall into supporting areas of different heights, so that the wafers of different sizes are stably supported.

The present invention discloses a velocity measurement device for gas vortex flow and a method of using the device, including a pitot tube, a measuring point position control mechanism, a vortex tube and an equipment bracket. The pitot tube is clamped at the bottom of the measuring point position control mechanism and inserted into the vortex tube, the measuring point position control mechanism is located above the vortex tube and fixed at the top of the equipment bracket, and the vortex tube is fixed at the bottom of the equipment bracket. Based on the Seebeck effect and the Bernoulli principle, a back-type pitot tube made of two hollow tubes of different metal materials is used to measure the velocity magnitude and direction of the gas vortex flow in the vortex tube. The present invention takes into account the difference in gas density between the center and the periphery caused by the pressure and temperature gradient in the vortex flow, and uses the measuring point position control mechanism to continuously and accurately move the velocity measurement point to avoid the interference of multiple measuring points on the flow field, thereby reducing the test cost while improving the measurement accuracy of the gas vortex flow velocity, and has broad application prospects.

To provide a substrate processing device capable of efficiently processing a substrate.SOLUTION: Fixing pins 33 support a substrate W at a position higher than a top surface 32a of a plate 32. Air outlets 34 blow out air upward from the top surface 32a of the plate 32. A blowout adjustment part 40 adjusts the flow rate of the air blown out by the air outlets 34. Thus, attraction force corresponding to the Bernoulli's principle acts on the substrate W supported by the fixing pins 33. Tactile sensors 33c detect force N received from the substrate W when the attraction force corresponding to the Bernoulli's principle acts on the substrate W supported by the fixing pins 33. A control part 18 changes the flow rate of the air blown out by the air outlets 34 on the basis of information of the force N received from the substrate W detected by the tactile sensors 33c.SELECTED DRAWING: Figure 5

The utility model relates to the technical field of gas flow meters, and discloses a fluid flow measuring device which comprises a differential pressure sensor mounting base, a differential pressure sensor packaging block is mounted at the top of the differential pressure sensor mounting base, and two first fluororubber sealing rings are mounted in the differential pressure sensor mounting base. The top of the differential pressure sensor packaging block is provided with a differential pressure sensor mainboard, the top of the differential pressure sensor mainboard is provided with four cross recess flat head screws, and the interior of the differential pressure sensor packaging block is provided with a second fluororubber sealing ring. According to the fluid flow measuring device, the pressure difference flow sensor is based on the Bernoulli principle and the continuity equation, when fluid flows through a throttling device (such as a pore plate and a Venturi tube), the flow speed can change due to the change of the cross section area, so that the pressure difference is generated, and the pressure difference and the flow speed of the fluid form a curve; and the flow of the fluid can be calculated by measuring the pressure difference.

The teaching toy based on the Bernoulli principle comprises a handle, a motor, a power source, a wing wheel and an annular sheet, the motor and the power source are respectively arranged in the handle, the motor is powered by the power source, a power switch is installed on the handle, the output end of the motor is connected with the wing wheel, and a plurality of flow guide grooves are formed in the surface of the wing wheel. The inner diameter of the annular sheet is larger than the outer diameter of the middle of the wing wheel, after the motor is started, the wing wheel drives surrounding air to flow, the air pressure intensity of the periphery of the middle of the wing wheel is minimum, and the annular sheet is suspended on the outer side of the middle of the wing wheel and rotates around the middle of the wing wheel. The teaching toy based on the Bernoulli principle integrates interestingness, scientificity, intuition and heuristic into a whole, the Bernoulli principle can be visually displayed, and students can complete demonstration operation by themselves and feel the Bernoulli principle by themselves.

The utility model belongs to the field of teaching experiment equipment, and particularly relates to a fluid measurement experiment device. Comprising an induced draft fan used for driving air to flow so that the air can obtain the flowing speed; the frequency converter is used for changing the rotating speed of the induced draft fan and further changing the air flowing speed, namely air speed; the ventilation pipeline is used for providing a specified path for flowing air, the two different ventilation pipelines are applied, and the variable-diameter pipeline can obtain different flow speeds under the same flow through measurement according to different circulation sections; and the other pipe is a transparent square pipe, so that students can measure and calculate the wind speed and the flow according to the Bernoulli principle. The pitot tube measurement system is used for being inserted into the ventilation pipeline for parameter measurement, and the reference measurement mechanism is used for verifying measurement data.

The utility model discloses a double-air-port bending type bladeless fan. The fan comprises a base, a main body table, an air inlet, an electric wire, a brushless electric fan, an integrated air channel and other main parts. After being accelerated by the brushless electric fan, airflow enters the streamline air channel and is exhausted through the two air outlets. Due to the contraction design of the streamline flow guide plate and the air channel, different flow speeds are formed when air flow passes through the two air outlets, and therefore the fitting degree of the air flow and an air channel frame is enhanced through the Bernoulli principle and the Coanda principle, air flow disturbance is reduced, and the stability of wind power output is improved. The fan adopts the bladeless design, noise is effectively reduced, potential safety hazards are eliminated, meanwhile, the fan is attractive in appearance due to the integrated air channel design, and the fan is suitable for families, offices and other places and has the high mute effect and safety.

The invention provides an underwater vehicle docking device and docking method, and belongs to the field of underwater equipment.The underwater vehicle docking device comprises a base, a barrel, a locking piece and a liquid medium conveying assembly; a barrel and a liquid medium conveying assembly are arranged on the base; a liquid spraying flat opening is formed in the inner wall of the cylinder body, the liquid spraying flat opening is axially arranged around the cylinder body, the liquid spraying flat opening sprays annular liquid flow in the axial direction of the cylinder body, and the underwater vehicle is guided to enter the cylinder body through the annular liquid flow; the locking piece is used for locking the underwater vehicle entering the cylinder body; the liquid medium conveying assembly is used for conveying water into the barrel wall of the barrel. By utilizing the Coanda effect and the Bernoulli principle, annular liquid flow is jetted through the barrel structure, and a stable flow field can be formed in the barrel and in the surrounding environment under the action of the annular liquid flow, so that the underwater vehicle is not interfered by a disordered flow field in a water body environment when being close to the barrel for butt joint; and under the guide of the annular liquid flow, the liquid enters the cylinder body without deviation and collision.

The present invention provides a gas relay based on flow rate tripping. When a serious fault occurs in a transformer, the transformer oil surges. Since the arc length of the arc-shaped shell is greater than the straight-line length of the elastic wave plate, the oil flow velocity on the upper surface of the flow rate switch structure is greater than the oil flow velocity on its lower surface. According to Bernoulli's principle, the oil flow pressure on the upper surface of the flow rate switch structure is less than the oil flow pressure on its lower surface. The oil flow pressure difference between the upper and lower surfaces of the flow rate switch structure causes the elastic wave plate to deform upward, driving the linear displacement component to move upward to trigger the alarm switch action, sending a trip signal, and shutting down the transformer. The flow rate switch structure does not rely on the preload force of a spring or a magnet, but directly drives the elastic wave plate to deform through the oil flow pressure difference, thereby driving the linear displacement component to move upward to trigger the alarm switch action, avoiding the problem caused by preload force drift, and improving the measurement accuracy and reliability of the gas relay in heavy gas signals.

The invention discloses a flow guide type pile foundation scouring protection method and device, and relates to the field of ocean engineering and hydraulic engineering. Comprising the following steps: S1, analyzing a flow field to obtain hydrological characteristic data of a sea area; s2, according to hydrological characteristic data, carrying out preliminary design on the key set size of the protection device; the structure comprises a main flow guide plate and a lateral flow guide plate, a flow guide protection device designed according to the Bernoulli principle is utilized, destructive descending water flow is converted into constructive sediment conveying water flow through multi-stage flow field regulation and control, and sediment is induced to deposit in a specific area around a pile while scouring is weakened. The flow separation phenomenon caused by pressure gradient sudden change when water flow flows through the surface of the main flow guide plate can be effectively avoided, the sand-containing water flow can be guided to stably enter and flow out of a protection area, and the conveying direction of sand can be better controlled.

The invention discloses an engine multi-fuel recognition device based on fuel fluid characteristics and a closed-loop regulation and control system. The engine multi-fuel recognition device comprises at least two fuel conveying pipelines. The fuel conveying pipeline is connected with the fuel storage device and the fuel mixing system, and a pressure adjusting device and a fuel recognition device are arranged on the fuel conveying pipeline. On the basis of the Bernoulli principle, when fuel is introduced into a pipeline P, the pressure in the pipeline changes, a floating valve ascends and descends, a spring is driven to deform, the displacement of the floating valve is converted into a spring stress signal, finally, data on a resistance strain sensor is compared with data of a pre-stored fuel type-stress database, and the current fuel type is recognized. In the closed-loop regulation and control system, an ECU (Electronic Control Unit) takes parameters such as engine thermal efficiency, oil consumption and emission as regulation targets, and regulates fuel flow through a flow regulation and control device according to information such as current working conditions of an engine, fuel types, a fuel mixing ratio, fuel remaining amount and fuel thermal efficiency, so that closed-loop regulation and control of the mixing ratio are realized.

The present invention relates to the field of control quality detection technology, and discloses an air quality detection alarm method and device, wherein the detection alarm device includes: a fixed base plate, an air quality sensor is installed in the middle of the top of the fixed base plate, and also includes: two mechanical gas collecting components, the two mechanical gas collecting components are installed on both sides of the top of the fixed base plate in a relative state. The air quality detection alarm method and device, through the Bernoulli principle and the linkage effect of the pressure plate structure, causes the rotating plate to be in a reciprocating rotation state, thereby achieving stretching and compression of the airbag, causing the airflow to continuously enter and exit the interior of the airbag, which is conducive to intercepting the latest airflow entering the interior of the airbag, ensuring the timeliness of intercepting the airflow, and after intercepting the airflow, the inlet and outlet of the opening and closing structure are blocked by the head assembly, and at the same time, the blocking block will also self-seal the channel to achieve the interception of abnormal gas.

The utility model provides a kind of high refrigeration performance's circulating fan, air duct uses the design of different cross-sectional area of air inlet end, air outlet end and wind passing section, combine the shell of hyperbolic structure and outer wall surface smooth transition, air inlet end large cross-sectional area makes air mass enter, wind passing section small cross-sectional area accelerates airflow, according to Bernoulli's principle, flow rate accelerates and causes pressure to reduce, temperature drops, and gas is similar to adiabatic expansion in flow, work to outside makes internal energy decrease.Air outlet grille area is less than air inlet grille, and air outlet grille strip is located between adjacent air inlet grille strip, avoid airflow interference, ensure air orderly flow, air outlet grille towards the sharp corner structure of air inlet end, not only strengthen air outlet directional property, make airflow concentrated blow out, expand refrigeration coverage, it is also possible to airflow produce cutting and disturbance, promote heat exchange, improve refrigeration performance, the refrigeration performance and circulation performance of the fan are used with air conditioner, and good energy-saving effect can be achieved.

1. The name of this design product: Bernoulli principle fan. 2. Purpose of this design product: This design is a Bernoulli principle blower used to blow air into a Bernoulli levitation balloon to suspend the Bernoulli levitation balloon in mid-air using the Bernoulli principle. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the key points of the design: Design 1 Stereoscopic Drawing 1. 5. Designate Design 1 as the base design.

The utility model discloses a granule blowing and conveying device which comprises a blowing and conveying main body, the cross section of the inner side wall of the blowing and conveying main body is square, the blowing and conveying main body comprises a compression channel, an expansion channel and a granule feeding channel, and the compression channel, the expansion channel and the granule feeding channel are converged at a public cavity. And the granular material feeding channel is inclined towards the direction of the compression channel. The cross section of the inner side wall of the material blowing and conveying main body is square, namely, the inner channel is a flat channel, the flat channel provides more air and material contact surfaces, the compression channel is connected with the high-pressure fan, air is compressed through the compression channel, the flow speed is increased, and therefore the vacuum degree is formed in the public cavity according to the Bernoulli principle, and the material blowing and conveying efficiency is improved. The inclined granular material feeding channel enables the granular materials to rapidly enter the public cavity and move towards the expansion channel, reverse backflow is not generated in the moving process, and smooth conveying of the granular materials can be achieved.

The invention discloses a containment suppression spray pipe based on an injection principle, relates to the technical field of reactor thermal hydraulic power, and solves the problem that condensate water hammer and thermal stratification caused by low-speed discharge operation of a suppression system are not considered at the same time in the prior art. The device comprises a containment, a discharge pipeline, a pressure suppression spray pipe and a pressure suppression box, wherein the containment is arranged at the upper end of the pressure suppression box; the upper end of the discharge pipeline is arranged in the containment, and the lower end is arranged in the water space of the pressure suppression box; a suppression spray pipe is arranged at the lower end of the discharge pipeline; the suppression spray pipe comprises a contraction pipe section, a straight pipe section and a diffusion pipe section, one end of the contraction pipe section is communicated with the discharge pipeline, and the other end is sequentially communicated with the straight pipe section and the diffusion pipe section; a plurality of through holes are formed in the straight pipe section. The pressure suppression spray pipe runs according to the Bernoulli principle, injection of supercooled water and gas can be achieved without external power, the pressure suppression spray pipe is simple and reliable, and the problems of condensate water hammer and thermal stratification are solved.

A suction unit 10 suitable for attracting an object P according to Bernoulli's principle comprises a deflection unit 12 having a deflection head 121 and a peg-shaped mounting element 122 adjacent to the deflection head 121, and a suction body 16, wherein the suction body 16 has a suction plate 11 with a front side facing away from the suction body 16, and the suction body 16 has an inlet passage 130 extending through the suction body 16 to the front side of the suction plate 11, the peg-shaped mounting element 122 is inserted into the inlet passage 130 from the front side of the suction plate 11, and the suction body 16 has a plurality of distribution passages 13 branching from the inlet passage 130, and a gaseous medium can be introduced into the deflection passage 110 from the inlet passage 130 through the distribution passages 13 to the front side of the suction plate 11, and the deflection passage 110 is bounded on one side by the front side of the suction plate 11 and on the other side by the deflection head 121 of the deflection unit 12. According to the present invention, along the flow channel segment 1300 of the inlet flow channel 130, each distribution flow channel 13 is connected to the inlet flow channel 130 by a connecting flow channel 133. The connecting flow channel 133 is closed by an inserted peg-shaped mounting element 122 or closing member 1200 along a part of the flow channel segment 1300, starting from the front side of the suction plate 11, and is open to the inlet flow channel 130 above the peg-shaped mounting element 122. Furthermore, a suction device 1 having a plurality of suction units 10 is disclosed.

The invention relates to the technical field of agricultural devices, in particular to an agricultural fan-shaped windproof nozzle. Comprising a runner body clamped at the bottom of an outer shell, and a backing ring is mounted at the bottom of the runner body; the outer shell comprises a base shell on the outermost layer and a flow guide shell integrally connected with the base shell, the flow guide shell is hollow, the upper half portion of the side face of the flow guide shell is not connected with the base shell, the lower half portion of the side face of the flow guide shell is provided with an air inlet gap communicated with the interior, a flat nozzle is formed in the top of the flow guide shell, and a semicircular nozzle hole is formed in the center of the nozzle. The runner body takes a circular-ring-shaped base as a bottom support, a clamping ring is arranged above the runner body, the runner body and the clamping ring are integrally formed into a structure shaped like a Chinese character'tu ', and a long-column-shaped flow guide body is arranged above the clamping ring; the fan-shaped spraying face with the intersection angle of 110 degrees can be sprayed, bubble mist spray containing air is added, a certain wind resistance effect is achieved, the Bernoulli principle and the innovative three-section clamping connection design are adopted, and the manufacturing cost can be reduced.

The present application relates to a kind of vacuum pump pressure reducing device and pressure reducing vacuum pump, and the vacuum pump pressure reducing device is equipped with air inlet passage end, exhaust passage end and pressure reducing cavity, by setting gas acceleration module in pressure reducing cavity, the gas flow rate in gas acceleration area is greater than the gas flow rate in gas inflow area, according to Bernoulli principle (the greater the gas flow rate, the smaller the pressure), by velocity change, the air inlet passage end and exhaust passage end that originally have similar pressure difference are generated, the pressure difference generated in two ends drives the gas flow rate of air inlet passage end to be larger.Thus, the exhaust resistance of air inlet passage end is relieved, the rotation rate of vacuum pump rotor is reduced, thereby preventing the excessive wear of vacuum pump, and prolonging the service life of vacuum pump.