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 provides a water outlet device of a plunger / piston pump. A flow passage switching pipeline structure is added between a water inlet passage and a water outlet passage, a first slider which is fixedly connected with a Venturi pipe device and slides synchronously is arranged in the flow passage switching pipeline structure, an elastic return device guiding along a guide slideway in the return direction and a liquid suction pipeline are arranged between the first slider and the guide slideway, and a second slider which is butted against the Venturi pipe device is arranged at the other end of a flow passage switching pipeline and is in sliding seal with the guide slideway. In a liquid suction working condition, a passage of the Venturi pipe device is communicated with the water inlet passage and the water outlet passage; and in a normal working condition, the Venturi pipe device is pushed to a stagger position of the water inlet passage and the water outlet passage, passage area between the water inlet passage and the water outlet passage is enlarged, local pressure loss of constant-pressure working media flowing through the position between the water inlet passage and the water outlet passage is reduced greatly, and accordingly water outlet pressure is increased with wasted work not increased. The invention further provides a cleaning machine.

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.

The invention discloses a compressor five-cavity air suction muffler and a compressor. The compressor five-cavity air suction muffler comprises a container and a filter screen, wherein the container is provided with an opening; the filter screen is mounted at the opening of a shell; the area of the filter screen is equal to that of the opening; a cavity is formed in the container; a plurality of partition plates are mounted in the container and divide the cavity in the container into a first cavity, a second cavity, a third cavity, a fourth cavity and a fifth cavity which are communicated with each other; and the first cavity is communicated with the opening of the container.

The invention relates to the technical field of construction equipment, in particular to a muddy water bypass device for a miniature pipe jacking machine. A water inlet pipeline and a water outlet pipeline are arranged on the lower side of a muddy water bin of the pipe jacking machine, a first four-way valve is arranged in the water inlet pipeline, a second four-way valve is arranged in the wateroutlet pipeline, wherein the first four-way valve is provided with a first water inlet, a first water outlet, a pressurizing opening and a first connecting opening, the pressurizing opening communicates to the muddy water bin of the pipe jacking machine through a pressurizing pipeline, a pressurizing valve is arranged at the pressurizing pipeline, and the second four-way valve is provided with a second water inlet A, a second water inlet B, a second water outlet and a second connecting opening. According to the muddy water bypass device, the structure size of the device can be reduced, and thein-machine space is saved; the universality and adaptability of the device are improved, the use is reliable, the manual labor amount is reduced, the occupational hazards are reduced, the structure is simple, a four-way ball valve is adopted for replacement to complete switching of three loops of a mud feeding and discharging mode, a bypass mode and a flushing mode, and the structural size of thedevice is greatly reduced.

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 provides an inclined penetrating type two-stroke diesel engine pipe joint suitable for a ship. The pipe joint comprises an exhaust manifold (1) and a penetrating type exhaust branch (2).The penetrating type exhaust branch (2) communicates to the exhaust manifold (1), the penetrating type exhaust branch outlet (4) penetrates into the exhaust manifold (1) to form a penetrating type structure; the penetrating type exhaust branch (2) comprises a straight pipe section (201) and a bended pipe section (202); the axis of the bended pipe section (202) and the axis of the exhaust manifold(1) form a first included angle (300); the penetrating type exhaust branch outlet (4) is deviated to the downstream side of the exhaust manifold (1); and the straight pipe section (201) and the bended pipe section (202) are integrally formed. The inclined penetrating type two-stroke diesel engine pipe joint is reasonable in structure and can reduce local pressure loss of exhaust of a low speed two-stroke diesel engine for the ship effectively.

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 discloses a dishwasher washing pump and a dishwasher. The dishwasher includes a spray arm. The washing pump includes a pump housing with an inner cavity. In communication, a guide part is provided in the inner cavity of the pump casing, and part of the structure of the guide part is located in the projection of the opening on the inner cavity, and the guide part is used to guide the water flow in the pump casing to change. The direction of movement breaks up the vortex and reduces the local pressure loss of the water flow. The present invention eliminates the energy loss caused by "dead water area" or "vortex area" in the washing pump, thus improving the working efficiency of the washing pump.

The invention relates to an exhaust muffler for a screw-type unit, which comprises an intake pipe, a muffler shell, and an air outlet pipe connected linearly in sequence; the muffler shell is composed of an expanding pipe, a straight pipe, and a tapering pipe according to the flow direction of the refrigerant , the turning space combined sequentially in the muffler shell is the muffler cavity; it is characterized in that: at least one of the expander and the reducer is fixed with an inner insert; the inner insert is formed with the expander or the The joint of the shrinking tube is inserted into the muffler cavity; the wall of the inner tube is provided with through-hole air holes; the center of rotation of the muffler shell coincides with the centers of rotation of the inlet pipe and the outlet pipe. On the premise of ensuring the noise reduction capacity, the pressure loss of the muffler is smaller and the structure is simpler, and the muffler can be applied to the frequency conversion screw type unit with a large change in noise frequency.

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 rotating-valve-type hydrodynamic impactor. An upper connector of the rotating-valve-type hydrodynamic impactor is connected with an upper outer pipe through a thread, a glandand a valve cover are sequentially fixed to the upper end face of a cylinder body through the upper connector, the cylinder body is sleeved with the upper outer pipe, and the periphery of the upper end of the cylinder body is sleeved with a freely-rotating rotor sleeve. Various vertical and radial fluid channels are formed in the cylinder body, a piston is formed by means of the method that an upper piston head and a lower piston head are connected to a piston rod in series, and according to the piston, the upper piston head and the lower piston head are machined on the piston rod. An end cover is inserted into the lower end of the cylinder body and positioned by a positioning pin, a middle connector is connected with an upper outer pipe and a lower outer pipe through threads, and the piston rod penetrates through the end cover to be connected with a hammer body to form a movement whole. A spline sleeve is connected with the lower outer pipe through a thread, a spline on a drill bit body is matched with a spline groove in the spline sleeve, an assembled body capable of axially moving is formed, and the lower bottom face of the hammer body makes contact with the top face of a drillbit. The rotating-valve-type hydrodynamic impactor has the advantages that the clamp-blocking problem caused by a slide valve is avoided, the structure is simple, impacting energy is large, and the service life is long.

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 water outlet device of a plunger / piston pump. A flow passage switching pipeline structure is added between a water inlet passage and a water outlet passage, a first slider which is fixedly connected with a Venturi pipe device and slides synchronously is arranged in the flow passage switching pipeline structure, an elastic return device guiding along a guide slideway in the return direction and a liquid suction pipeline are arranged between the first slider and the guide slideway, and a second slider which is butted against the Venturi pipe device is arranged at the other end of a flow passage switching pipeline and is in sliding seal with the guide slideway. In a liquid suction working condition, a passage of the Venturi pipe device is communicated with the water inlet passage and the water outlet passage; and in a normal working condition, the Venturi pipe device is pushed to a stagger position of the water inlet passage and the water outlet passage, passage area between the water inlet passage and the water outlet passage is enlarged, local pressure loss of constant-pressure working media flowing through the position between the water inlet passage and the water outlet passage is reduced greatly, and accordingly water outlet pressure is increased with wasted work not increased. The invention further provides a cleaning machine.

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 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.

The invention relates to the field of buildings, and discloses an arch-shaped cavity fluid flowing floor slab, an arc-shaped groove is formed in the bottom surface of the floor slab, a groove enabling the groove to be communicated with the outer side of the floor slab is formed in the side part of the arc-shaped groove, the depth of the groove is close to that of the groove, and a supporting surface is arranged at the bottom of the floor slab. A groove is formed in the floor, the floor and the supporting face form a box body structure, a cavity and a pipeline are arranged in the box body structure, two arched beam plates which are arranged in a crossed mode are arranged in the groove, the bending degree of the arched beam plates is consistent with the radian of the groove, and beam feet at the two ends of the arched beam plates are fixedly connected with the supporting face. The concrete consumption is reduced, the bearing capacity of the whole structure is improved, reinforcing steel bars do not need to be embedded into the floor slab for reinforcement, the flowing pipe formed by arranging the floor slabs has no obvious sudden expansion and sudden shrinkage structures, local pressure loss in the flowing process of airflow or water flow is effectively reduced, and the efficiency of fluid flowing work such as smoke exhaust, ventilation and water drainage is remarkably improved.

The invention discloses a washing pump of a dishwasher and the dishwasher. The dishwasher includes spray arms, the washing pump includes a pump shell with an inner chamber, openings are arranged in the pump shell and communicate with the spray arms, a diversion piece is arranged in the inner chamber of the pump shell, and parts of structures of the diversion piece are located within projection ofthe openings in the inner cavity; and the diversion piece is used for guiding water flows in the pump shell to change moving directions to break up a vortex and reduce local pressure loss of the waterflows. By using of the washing pump and the dishwasher, energy loss caused by "dead water zones" or "vortex zones" in the washing pump can be eliminated, and therefore working efficiency of the washing pump is improved.

The invention provides a cylinder cover which comprises an upper-layer water jacket, a lower-layer water jacket, a partition plate and a first cavity, the upper-layer water jacket is provided with a first water outlet, the first cavity comprises a second water outlet and a first water inlet, and the first water outlet is formed above the first water inlet. The invention further provides an engine which comprises an engine body, a thermostat shell and the cylinder cover, the second water outlet is formed in the bottom of the cylinder cover, an engine body water return opening is formed in the top of the engine body, the second water outlet is communicated with the engine body water return opening, and the first water outlet and the first water inlet are both communicated with the thermostat shell. The cylinder cover, the engine body and the thermostat shell are directly connected, the circulating water paths are all arranged in the engine, external pipelines of the engine body are omitted, pressure loss is small, and efficiency is high.