30results about How to "Reduce local pressure loss" patented technology

The invention discloses a micro-channel cold plate structure. The micro-channel cold plate structure comprises a substrate and a micro-flowing-channel network processed on the substrate; and the micro-flowing-channel network comprises a shunting structure, a partial micro-channel network and a confluence structure in a combined manner. The micro-channel cold plate structure has the beneficial effects as follows: reasonable flow deploying of a cooling working medium is realized through T-shaped flowing channels, and then heat transfer is strengthened by tree-like and parallel micro channels; finally, energy re-confluence is realized through inverse Y-shaped two-furcation flowing channels, so that high channel distribution uniformity is realized, and the network can be uniformly distributed in the whole to-be-dissipated region; the overall micro-fluid network is in all-parallel-connection way, so that high temperature consistency is achieved; the cooling working medium flows smoothly in the flowing channels, so that low flowing resistance is formed; and furthermore, the micro channels in each group of the partial micro-channel network are arranged in parallel, and the channels are more in branches and high in span, so that the process can be realized conveniently, partial pressure loss can be lowered, and the heat dissipation performance of the micro-channel cold plate can be further improved.

The invention relates to the liquid rocket propulsion technology, and particularly discloses a thrust chamber collector with a flow uniformizing function. A body shell is composed of an inner wall and an outer wall together. A cylinder formed when the inner wall is closed serves as a combustion chamber. An interlayer between the inner wall and the outer wall forms a cooling passageway. Annular grooves are formed in the inlet and the outlet of the cooling passageway. A bent pipe of the collector is welded and connected to the body shell at the annular groove in the inlet of the cooling passageway. A collector cavity is formed by the bent pipe and the body shell. The opening of the collector cavity is welded and connected to an inlet flange to form a collector inlet. Due to the double-collection-cavity structure, fluid is secondarily uniformized before entering the cooling passageway; by means of a horn-shaped expansion inlet with a reverse-Y-shaped diversion piece, fluid can more stably turn at the collector inlet, pressure fluctuation at the inlet and the two sides is reduced, local pressure loss can be reduced, and the diversion piece can play a role in reinforcing structure supporting.

The invention relates to a piece of internal leakage detection equipment and device for a hydraulic oil cylinder. The internal leakage detection equipment for the hydraulic oil cylinder at least comprises a cylinder barrel, a piston rod assembly installed inside the cylinder barrel in a matched mode, and a speed detection mechanism fixedly installed in the cylinder barrel and used for sensing the movement speed of the piston rod assembly. By the adoption of the internal leakage detection equipment and device, accurate judgment data are provided for internal leakage of the hydraulic oil cylinder.

The invention relates to a micropump structure based on liquid metal at room temperature, the micropump structure including a channel, a first electrode, a second electrode and a power generator. An open chamber is arranged in the channel, a liquid metal droplet is contained in the open chamber, an electrolyte solution is filled in the channel, one end of the first electrode and one end of the second electrode are in contact with the electrolyte solution, and the other end of the first electrode and the other end of the second electrode are connected with the power generator. The structure does not contain any mechanical moving parts, greatly reduces the local pressure loss caused by the micro pump structure itself in the fluid, and simultaneously avoids the heat loss caused by the heatingof the parts, at the same time, the structure can generate a larger flow rate under relatively small power consumption, the structure is simple and efficient, and the pumping effect is greatly improved.

The invention relates to an exhaust silencer for a screw type machine set. The exhaust silencer comprises an air inlet pipe, a silencer shell body and an air outlet pipe which communicate with each other sequentially and straightly; and the silencer shell body is composed of a diverging tube, a straight tube and a converging tube in the flow direction of a refrigerant, and gyration spaces which are sequentially combined in the silencer shell body form a silencer cavity. The exhaust silencer is characterized in that an insert-pipe is fixedly arranged in at least one of the diverging tube and the converging tube; the insert-pipe is inserted into the silencer cavity through the joint of the insert-pipe and the diverging tube or the insert-pipe and the converging tube; through-hole type air vents are formed in the pipe wall of the insert-pipe; and the gyration center of the silencer shell body coincides with the gyration centers of the air inlet pipe and the air outlet pipe. According to the exhaust silencer for the screw type machine set, on the premise of ensuring noise elimination, the pressure loss of the silencer is lower, the structure is simper, and moreover, the silencer can be applied to a variable-frequency screw type machine set with great noise-frequency change.

The invention discloses a cyclone separator overflow pipe with horn-mouth-shaped flow guide plates. The cyclone separator overflow pipe comprises a straight pipe section and a horn-mouth-shaped pipe with a small upper part and a large lower part, wherein the small mouth end of the horn-mouth-shaped pipe is connected with the lower end of the straight pipe section; the inner wall of the horn-mouth-shaped pipe is uniformly provided with flow guide plates; the flow guide plates comprise circular arc plates and straight plates which are connected with each other and are tangent. The invention also discloses a cyclone separator using the overflow pipe structure. The cyclone separator is relatively stable in inner flow path, basically eliminates the short-circuit current effect, and reduces the pressure loss greatly, so that the integral running performance is improved obviously.

Provided is a composite pneumatic transport rotational flow elbow pipe. The composite pneumatic transport rotational flow elbow pipe includes a pipe body for transporting fluid; the pipe body includesan inlet straight pipe part, an elbow pipe part and an outlet straight pipe part. The inlet straight pipe part includes an inlet straight pipe segment, a gas-solid mixture inlet, a rotational flow gas inlet, a rotational flow gas mixing chamber and a rotational flow generation hole; the elbow pipe part includes an elbow pipe segment, a primary rotational flow generation pipe and a secondary rotational flow generation pipe; the outlet straight pipe part includes an outlet straight pipe segment and a gas-solid mixture outlet which is formed in the end portion of the outlet straight pipe segment. By adopting the composite pneumatic transport rotational flow elbow pipe, adequate rotational flow gas can be generated, rotational flow transportation is achieved, collision and friction between particles and a pipe wall are effectively reduced, the material transport quality is improved, the service life of the composite pneumatic transport rotational flow elbow pipe is effectively prolonged,meanwhile, local pressure loss is reduced, and the working efficiency of a pneumatic transport system is improved.

The invention provides a test system for filter screen life and a testing method thereof, and relates to the field of filter screen life testing. The device comprises an air inlet drive pipe, a clamping device connected with the air inlet drive pipe and an air outlet drive pipe connected with one side of the clamping device remote from the air inlet drive pipe, the clamping device comprises a first clamping pipe in threaded connection with the air inlet drive pipe, a second clamping pipe in threaded connection with the air outlet drive pipe, and a clamping part arranged on the first clamping pipe for fixing with the second clamping pipe, the filter screen is arranged between the first clamping pipe and the second clamping pipe; a static pressure test point 1, a static pressure test point 2and a static pressure test point 3 are respectively arranged on inner walls of the air inlet drive pipe, the first clamping pipe and the second clamping pipe; and pressure testing devices are arranged at each of the static pressure test point 1, the static pressure test point 2 and the static pressure test point 3. The system has the advantages that disassembly and installation process of test assemblies can be effectively simplified in the life testing process of the filter screen, the disassembly and the assembly of the single person can be realized, and working efficiency is improved.

The invention discloses a double-sided cooling structure for a vehicle-mounted inverter, comprising an inverter shell and a double-sided cooling channel power module. A water channel is formed in theinverter shell. The double-sided cooling channel power module is clamped to the surface of the inverter shell. The other side of the upper end of the inverter shell is connected with a heat conductionplate through bolts, and the heat conduction plate is of a bent structure. The other end of the heat conduction plate is clamped at the upper end of the double-sided cooling channel power module, andthe other end of the heat conduction plate is also connected with the side wall of the inverter shell through bolts. An upper heat conduction interface material is adhered to the upper end face of the double-sided cooling channel power module. Improvement is made on the basis of the original single-sided water cooling structure. The water channel is constructed on the machine shell, a heat dissipation channel does not need to be independently arranged for other heating devices, and the original single-sided water cooling structure is inherited. The technology is mature, and the reliability ishigh. There is only one flow channel cavity, and local pressure loss caused by a communicated structure is greatly reduced.

The invention provides a low-resistance rainproof noise reduction device for an air inlet. The device comprises an outer frame, a first sound absorption and insulation sheet, a second sound absorptionand insulation sheet and third sound absorption and insulation sheets, wherein the first sound absorption and insulation sheet is detachably fixed on the inner upper part of the outer frame through fixing assemblies; the second sound absorption and insulation sheet is fixed on the inner bottom of the outer frame; the third sound absorption and insulation sheets are detachably fixed in the outer frame through fixing assemblies and uniformly arranged between the first sound absorption and insulation sheet and the second sound absorption and insulation sheet in a gap mode; and the first sound absorption and insulation sheet and the third sound absorption and insulation sheets are designed to be in an arc shape. According to the low-resistance rainproof noise reduction device for the air inlet, the sound absorption and insulation sheets of the device are arch, so that the size is reduced; a rainproof shutter is not needed, a windward surface is a metal non-perforated protective panel, sothat rain and snow are prevented from entering; a noise facing surface is a metal perforated protective panel to absorb and consume sound energy; flow guide circular arcs are arranged at the abrupt change positions of airflow, so that local pressure loss is reduced; the sound absorption and insulation sheets adopt the fixing assemblies convenient to disassemble, thereby being convenient to disassemble, clean and replace; and under the condition that the noise reduction amount is determined, the size can be effectively reduced, so that the pressure loss is reduced, and the disassembly and the assembly are facilitated.

The invention discloses a vertical low-carbon condensation energy saver. The energy saver comprises a housing, a front cover plate, a rear cover plate, a heat exchange coil pipe and a combustion assembly; the whole housing is of a cavity structure with two open ends, the front cover plate and the rear cover plate are arranged on the two sides of the housing respectively, and the heat exchange coil pipe is arranged in the housing; and the combustion assembly is arranged in the heat exchange coil pipe, and the heat exchange coil pipe is of a double-circle coil pipe structure. According to the energy saver, through the arrangement of various structures, flue gas multiply flows around, such that the flowing time of high-temperature flue gas can be effectively shortened, and the retention time of the high-temperature flue gas in the cavity is longer; and meanwhile, the high-temperature flue gas can be in contact with an inner-circle coil pipe and an outer-circle coil pipe as much as possible, such that a temperature difference of liquid in the inner-circle coil pipe and the outer-circle coil pipe is smaller, and the temperature of the liquid finally converged into a water outlet box is more constant.

The invention provides a gas suction silencer, a compressor and a refrigerator. The gas suction silencer comprises a shell. A gas inlet and an exhaust port are formed in the shell. A partition plate is arranged in an inner cavity of the shell. The inner cavity is divided into an upper cavity corresponding to the exhaust port and a lower cavity corresponding to the gas inlet through the partition plate. Multiple through holes penetrating through the upper cavity and the lower cavity are formed in the partition plate. The gas suction silencer further comprises multiple oil-gas separation covers.The multiple oil-gas separation covers are arranged on the multiple through holes in a one-to-one correspondence and covering manner and are located on the side, facing the upper cavity, of the partition plate. Each oil-gas separation cover is provided with a flow hole so that the upper cavity and the lower cavity can communicate. According to the gas suction silencer, the compressor and the refrigerator, the cylinder gas suction oil carrying amount can be decreased, and meanwhile the gas suction gas flow resistance and the gas suction noise can be reduced and gas suction can be more uniformand smoother.