32results about How to "Guaranteed flow area" patented technology

The invention discloses a recirculation intake pipe fitting with a guiding function, which includes a main pipe, and a first ring road and a second ring road are sheathed on the outside of the main pipe, and the first ring road and the second ring road are connected with the main pipe. A first ring channel cavity and a second ring channel cavity are formed between the pipes, and the first ring channel and the second ring channel are connected by a ring plate, and the ring plate is uniformly provided with circulation holes along the circumference. The side wall of the pipeline is also provided with an annular groove communicating with the second ring channel cavity. The annular groove is arranged obliquely along the side wall of the main pipeline. An air inlet pipe is vertically arranged outside the first ring road. The air inlet pipe is connected to the first ring road cavities connected. The air inlet pipe adopts the decompression structure of the side-by-side two-stage ring cavity, which is compact in structure, reduces the airflow loss while decompressing, and prevents the recirculation gas from entering the main flow channel. The inclined design of the annular groove has a guiding effect on the airflow, and It is convenient for processing and avoids adverse effects on the working efficiency of the supercharger compressor impeller due to the pressure and inlet angle of the recirculating gas.

The invention discloses a traction type molecular pump embedded in a device, which comprises a shell with a rotor installed inside, a first-stage molecular pump whose inner wall forms a helical suction groove and is coaxial with the rotor; and is interference-connected with the first-stage molecular pump The upper end surface of the third-stage molecular pump forms an upper annular flange, the lower end surface forms a plurality of air extraction grooves, a central through hole is formed in the middle, the inner wall of the central through hole forms a spiral air extraction groove, and the lower part of the third-stage molecular pump forms a ring Shaped assembly grooves; the lower end surface of the ring-shaped second-stage molecular pump that is interference-fitted with the assembly groove in the third-stage molecular pump forms a plurality of suction grooves, and the edge of the second-stage molecular pump forms a plurality of holes corresponding to the screw holes. groove. The invention has the characteristics of low processing cost and easy processing and installation; and the invention utilizes the characteristics of the high-speed rotation of the rotor itself, and can make the pressure in the device reach 10 without further improving the external evacuation capacity. -3 State of Pa.

The invention discloses a method and device for manufacturing a refractory ceramic cyclone cylinder. The device is used for reasonably separating an existing integral cyclone cylinder and comprises two main components which are a cyclone and a cylinder. The components are mechanically manufactured, have stable size uniformity and can be directly combined. The cyclone is manufactured through mechanical pressing. The curvature of vanes and the inclination angle of the vanes can keep completely parallel to one another, so excellent flow guiding effects can be ensured. The vanes are directly connected with the cylinder walls on the two sides without large circular angle transition connection. Consequently, the flow area of air guide holes is guaranteed, cracks caused by internal stress in the firing process are avoided, and the yield rate is greatly improved. The cylinder is manufactured through mechanical spinning. The wall thickness of the cylinder is uniform, and the circular degree of the cross section of the cylinder is good in quality. The cyclones with various diameters can be flexibly produced by changing the molds, and the cyclones with the large diameter ranging from 500 millimeters to 800 millimeters can be produced.

The invention discloses a compressor, comprising a shell, a compression mechanism, a support rod, a support base and a thrust component; the compression mechanism is arranged in the shell and comprises a main bearing, an air cylinder, a secondary bearing and a crankshaft; the main bearing is arranged at the top of the air cylinder and the secondary bearing is arranged at the bottom of the air cylinder; the crankshaft penetrates through the main bearing, the air cylinder and the secondary bearing in sequence; a central hole is formed inside the crankshaft; a spiral groove is formed in the peripheral wall of the support rod; at least one part of the support rod stretches into and is fixed in the central hole; the support base is arranged at the lower end of the secondary bearing and is constructed to enable a lubricating oil at the bottom of the shell to enter a clearance between the support rod and the central hole; the thrust component is arranged at the lower end of the support rod; the bottom of the thrust component is propped against the support base; and the contact centre of the thrust component and the support base is located on a rotary central line of the crankshaft. According to the embodiment of the invention, the compressor is high in reliability and has good performance.

The invention provides a star lander storage box propellant management device and a manufacturing method thereof. The star lander storage box propellant management device comprises a supporting cover, a base, a damping management area, an internal net management layer and an external net management layer. The internal net management layer and the external net management layer are welded to the base. The internal net management layer is embedded in and sleeved with the external net management layer. Gas-liquid mixed propellant of the damping management area is drained to the external net management layer, becomes single-phase liquid propellant after being subjected to gas-liquid separation through the external net management layer, and enters an external net management area formed by the external net management layer. The single-phase liquid propellant flows to an internal net management area formed by the internal net management layer through the internal net management layer and is then discharged out of a storage box. Before the external net management layer loses efficacy, the internal net management layer is completely soaked in the propellant, and therefore the constant flowing area of the internal net management layer and low flow resistance generated when liquid passes through a net under large flow are ensured. The internal net management area is completely in the liquid-full state in the drainage process before the internal net management layer loses efficacy, and therefore it is prevented that gas is sucked into a liquid path outlet due to rotational flow when large-flow discharge is conducted, and it is ensured that the air-assistance-free propellant is reliably supplied to an engine.

The invention discloses an air inlet recycling pipe component with annular pipeline cavities. The air inlet recycling pipe component comprises a main pipeline; a first annular pipeline and a second annular pipeline sleeve the outer side of the main pipeline; a first annular pipeline cavity and a second annular pipeline cavity are formed between the first annular pipeline and the main pipeline as well as between the second annular pipeline and the main pipeline; the first annular pipeline is connected with the second annular pipeline through an annular plate; ventilation holes are uniformly formed in the circle of periphery of the annular plate; an annular notch which is communicated with the second annular pipeline cavity is also formed in the side wall of the main pipeline; a recycling air inlet pipe is vertically arranged on the outer side of the first annular pipeline; and the recycling air inlet pipe is communicated with the first annular pipeline cavity. According to the air inlet recycling pipe component, a decompression structure formed by the parallel two-stage annular pipeline cavities is adopted, so that the structure is compact, and airflow loss is reduced while the pressure is reduced; and the phenomenon that after recycling air flows into the main pipeline, the pressure of the recycling air causes adverse influence on the working efficiency of a supercharger compressor impeller and causes turbulent flow influence on the air in the main pipeline is avoided.

The invention relates to a pipeline type steam filter screen with a double-funnel structure, which can guarantee the whole flow area and has the characteristics of being convenient to assemble and disassemble, simple in structure and low in cost. According to the technical scheme, the pipeline type steam filter screen is characterized by comprising a funnel-shaped outer net and a funnel-shaped inner net, wherein the diameter of the outer net is gradually reduced from the bottom end to the top; the bottom end of the outer net is provided with a flange ring, and a mouth part on the top of the outer net is connected with the top of the inner net; the inner net extends into the outer net downward; and the diameter of the inner net is gradually reduced from the top to the bottom end.

The invention relates to a two-way control proportional one-way flow valve, which is characterized in that it includes a valve body, a valve sleeve, and the valve sleeve is provided with a first oil port, a second oil port and a valve port; the valve sleeve is provided with a main valve core , the outer peripheral tapered surface of the main valve core is matched with the valve port, there is a control cavity and an installation cavity inside the main valve core, a first damping hole is opened on the side wall of the main valve core, and a second damping hole is arranged inside the main valve core, The aperture of the first damping hole is smaller than that of the second damping hole; a pilot valve core is arranged in the control chamber, and the pilot valve core is controlled by a proportional electromagnet structure to move up and down, and the lower end of the pilot valve core cooperates with the second damping hole; installation A bushing and a valve seat are installed in the cavity, the bushing has an orifice, the orifice is provided with a steel ball, the valve seat is provided with a spring seat, the steel ball is placed on the spring seat, and the spring seat is supported by a second a spring. The utility model is a proportional one-way flow valve with a more reasonable structure and low cost, which can realize bidirectional proportional control and can satisfy low-load use.