156results about How to "Small pressure loss" patented technology

The invention belongs to the technical field of power station boiler waste heat recycling energy-saving equipment and relates to a plate-and-shell type coal economizer. The plate-and-shell type coal economizer comprises a corrugated plate heat exchange core body (1), a heat exchanger shell (2), a first and a second water inlet / outlet water tank (3, 3') and a first and a second exhaust gas inlet / outlet pipeline (4, 4'), wherein the corrugated plate heat exchange core body (1) is mounted in the heat exchanger shell (2), the first and second water inlet / outlet water tanks (3, 3') are respectively arranged at the upper and lower ends of the front side of the corrugated plate heat exchange core body (1), and the first and second exhaust gas inlet / outlet pipelines (4, 4') are respectively arranged at the upper and lower sides of the corrugated plate heat exchange core body (1). The plate-and-shell type coal economizer solves the problem that the length of a water passage needs to be increased to solve the problem of unapparent water heating due to the great difference between an exhaust gas density and a water density, and meanwhile, a corrugated passage at the exhaust gas side enables the exhaust gas flow turbulivity to be increased and the heat transfer efficiency to be improved; the blockage due to ash accumulation happens rarely, even if the ash is accumulated, the cleaning is easy to finish.

The invention relates to the technical field of assembling tools, and discloses a push rod assembly assembling tool which comprises a tool containing base, a mounting groove is formed in the surface of the tool containing base and used for being clamped into a table, the tool adopts a three-in-one integrated design, a push rod assembly is divided into three parts of assembling procedures, the assembling procedures are completed on the same tool containing base in a centralized mode, and the assembling efficiency is improved. The first assembling part is arranged along the Y axis and can synchronously complete pretreatment assembling of multiple sets of guide rod assemblies, the second assembling part arranged along the X axis is matched with the extrusion assembly to achieve pressing-in operation of a plastic cover, the third assembling part is arranged along the Z axis, assembling of a gear and a cover body assembly in a push rod shell assembly is achieved, the transfer time between procedures is greatly shortened, and the connection cost is greatly reduced. And through integrated layout, precise positioning and convenient operation design, the production efficiency is remarkably improved, the product quality is effectively guaranteed, and the labor and equipment investment cost is reduced.

The utility model discloses a lubricating oil interruption test device for a turbofan engine. The lubricating oil interruption test device comprises a lubricating oil tank, a lubricating oil pump, a low-pressure compressor, a high-pressure compressor and an intermediate case positioned between the low-pressure compressor and the high-pressure compressor, the gas supply device is used for supplying gas to the lubricating oil pump during the test and comprises a gas supply pipeline; the oil supply test device comprises a mounting support, a three-way switching valve mounted on the mounting support, a first oil supply pipeline and a second oil supply pipeline, the three-way switching valve comprises a first communication port, a second communication port and a third communication port, the first communication port of the three-way switching valve is connected with an air supply pipeline, and the second communication port of the three-way switching valve is connected with a second oil supply pipeline. The first oil supply pipeline is connected between a second communication port of the three-way switching valve and the lubricating oil tank, the second oil supply pipeline is connected between a third communication port of the three-way switching valve and the lubricating oil pump, and the three-way switching valve is provided with a first valve position communicated with the first communication port and the third communication port and a second valve position communicated with the second communication port and the third communication port. And the mounting bracket is mounted on the intermediate case.

The utility model relates to a filter assembly and an air conditioning system, the filter assembly comprises a filter and a plurality of connecting pipes, the plurality of connecting pipes are respectively connected to the filter, and the filter and the connecting pipes are made of stainless steel; and moreover, the connecting pipe is provided with a bent part, the flatness ratio of the connecting pipe at the bent part is A, and A is less than or equal to 15%. According to the filter assembly, the bending strength can be guaranteed, and the material cost is low.

The invention relates to the technical field of stone cutting, and provides a temperature control system and method of a wire roller bearing for a stone wire cutting device. Cooled lubricating oil output by an oil cooler continuously flows into a bearing cavity to take away heat generated by high-speed rotation of the bearing, so that the temperature of each part in the bearing cavity reaches a preset balance value; the oil temperature of each bearing is controlled in a relatively consistent range while lubrication is provided for the bearing, and the pipe diameter of the oil pipe is correspondingly designed according to the oil path distance between the bearing and the oil inlet and distribution block, so that the consistency of the oil lubrication pressure of the bearing at different distances is ensured, the pressure loss is reduced, the cooling effect of the bearing is improved, and the service life of the bearing is prolonged. And therefore, stable operation of the bearing is guaranteed, the problems of cutting gap enlargement and wire breakage caused by skewness and bounce enlargement are avoided, and the stone wire cutting precision can be improved.

The invention relates to a batch automatic design method and system for turbine end wall modeling, belongs to the technical field of turbine mechanical design, and provides non-axisymmetric end wall modeling design for an axial flow turbine by taking a trigonometric function and a Bezier curve as axial modeling functions and taking a sine function as a circumferential modeling function. Meanwhile, the non-axisymmetric end wall curved surface is accurately drawn through programming, and a point cloud file of the three-dimensional curved surface is generated. And then the point cloud file is imported into three-dimensional modeling software for three-dimensional curved surface modeling, and automatic batch design of the non-axisymmetric end walls of the axial flow turbine is achieved. The end wall near the pressure surface is convex, and the end wall near the suction surface is concave, so that the airflow of the end wall near the pressure surface is accelerated to flow, the static pressure is reduced, the airflow of the end wall near the suction surface is decelerated, the static pressure is increased, and the non-uniformity of circumferential distribution of the static pressure in the end area is reduced; flow separation among the blades is effectively improved, vortex shedding is reduced, pressure loss is reduced, and turbine performance and efficiency are improved.

The application discloses a parallel flue gas cooling heat exchanger and relates to the technical field of heat exchangers. The parallel flue gas cooling heat exchanger comprises a flow regulating mechanism and parallel heat exchange pipes installed in the middle of the flow regulating mechanism. A cleaning mechanism is arranged outside the flow regulating mechanism, and a rotating rod is arranged inside the cleaning mechanism. The flow regulating mechanism comprises a flow regulating pipe. An adjusting conical groove is formed in the inner side of the end of the flow regulating pipe. A limiting support is fixedly installed inside the flow regulating pipe. A plurality of limiting sliding rails are slidably connected to the inside of the limiting support. The size of the cooling water flow in each parallel heat exchange pipe is controlled, the water flow in each parallel heat exchange pipe is substantially equal, the cooling water in each parallel heat exchange pipe can be fully exchanged with high-temperature flue gas, insufficient heat exchange caused by insufficient flow of some parallel heat exchange pipes is avoided, the overall heat exchange efficiency can be increased by more than 15%, and the flue gas cooling effect is uniform and stable.

This invention provides a coolant flow channel plate, relating to the technical field of vehicle thermal management. It includes a cover plate fixed to the top of a main board, with the main board and cover plate welded together at their side edges to form an internal flow channel cavity. The cover plate has refrigeration unit inlet / outlet assemblies on its surface. The main board has, from left to right, a heater pump mounting port, a battery pump mounting port, and a motor pump mounting port. The circuits between the heater pump and battery pump mounting ports, and between the heater pump and motor pump mounting ports, within the internal flow channel cavity are each equipped with a first anti-heat-spreading section. The circuit between the motor pump and battery pump mounting ports forms a variable-diameter section, with a second anti-heat-spreading section at its front end. A guide section is provided on the circuit of the battery pump mounting port. This invention solves the problem of lacking anti-heat-spreading structures at the connection points of circuits in different temperature ranges, achieving the technical effects of reducing vehicle weight, reducing vehicle connection piping, reducing heat loss in the thermal management system, and improving thermal management efficiency.

The invention relates to a device (10) for providing air into a combustion furnace (18), the device (10) comprising: a sleeve (11) enclosing a distribution chamber (20) and a feed duct (21) extending outwardly from the distribution chamber (20); an inlet (12) for receiving air from an air source into the distribution chamber (20); an outlet (13) located at the end of the feed duct (21) for discharging air from the inside of the sleeve (11); an inlet valve (19) arranged at the inlet (12) and adjustable to control the air entering the distribution chamber (20) through the inlet (12); a damper (14) arranged within the feed duct (21) and movable from a restricted position to an open position, or to a position between them, to regulate the flow of air discharged through the outlet (13). In the device (10) according to the invention, the damper (14) comprises a first flow-limiting element (15a) and a second flow-limiting element (15b), which are arranged one above the other and at a distance from one another in the feed duct (21), the first flow restriction element (15a) and the second flow restriction element (15b) are arranged such that at least a portion of the air flowing from the distribution chamber (20) to the feed duct (21) can flow through a gap (GP) between the first flow restriction element (15a) and the second flow restriction element (15b) to the outlet (13). The invention also relates to a combustion furnace (18) and to a method for providing air into a combustion furnace (18).

The utility model relates to an engine EGR system arrangement structure which comprises an EGR cooler, an EGR valve and an air inlet manifold, the air inlet end of the EGR cooler is used for being communicated with waste gas, the air outlet end of the EGR cooler is used for being communicated with the air inlet end of the EGR valve, the air outlet end of the EGR valve is communicated with the air inlet end of the air inlet manifold, the air inlet end of the air inlet manifold is provided with a flow deflector, and the flow deflector is provided with a flow guide hole. Waste gas passes through the EGR cooler and the EGR valve and flows into the intake manifold through the flow guide holes of the flow deflectors, and the flow guide holes are used for dispersing and guiding the waste gas passing through the flow deflectors. The netted flow guide structure is additionally arranged at the air inlet end of the air inlet manifold, so that after an EGR air outlet pipe is omitted, the pressure loss of an EGR system is reduced, the EGR rate of an engine can be improved, the oil consumption of the engine can be reduced, and the EGR uniformity and the combustion uniformity can be improved.

This invention provides a hydraulic control system for a concrete placing boom, comprising a hydraulic oil tank, an oil supply pump unit, a main hydraulic pressure pipeline, a main return hydraulic pipeline, and at least one hydraulic actuator unit. The oil supply pump unit is located on the main hydraulic pressure pipeline. Each hydraulic actuator unit includes a hydraulic cylinder and a control valve assembly. The control valve assembly is located close to the hydraulic cylinder, or integrated onto the hydraulic cylinder. The control valve assembly includes a main directional valve, a standby directional valve, and a balance valve assembly. The inlet ports of the main directional valve and the standby directional valve are respectively connected to the main hydraulic pressure pipeline. The return ports of the main directional valve and the standby directional valve are respectively connected to the main return hydraulic pipeline. The outlet ports of the main directional valve and the standby directional valve are respectively connected to the hydraulic cylinder via the balance valve assembly. This invention also provides a control method for the hydraulic control system of the concrete placing boom and a concrete placing boom device.

The application discloses a kind of air-cooled fuel cell humidification systems and its control method, solve the problem of air-cooled stack humidification system structure complex, uneven gas intake in prior art.The application includes humidification cavity with water injection port and gas outlet;First homogenizing cavity is used to flow through gas and guide;Second homogenizing cavity is arranged on the first homogenizing cavity;Fan is arranged on the first homogenizing cavity for conveying gas into the first homogenizing cavity;Moisture guide mechanism one end is connected with gas outlet, the other end is connected with the first homogenizing cavity;Air-cooled stack is arranged on the second homogenizing cavity gas outlet end;Controller is connected with fan, moisture guide mechanism and air-cooled stack respectively.The application is controlled by fan, moisture guide mechanism, air-cooled stack and controller cooperation, controller controls the operating power of fan and moisture guide mechanism according to the power of air-cooled stack, to control the humidification amount of air-cooled stack, reduce the performance attenuation of air-cooled stack, improve the stability of air-cooled stack.

The utility model relates to an ultrasonic gas meter flow regulator. The flow regulator is characterized in that the flow regulator is mounted at a flow channel air inlet of the flow channel and sequentially comprises a scattering layer, a developing layer and a rectifying layer which are integrally formed through injection molding or are assembled and connected in a split manner. The utility model aims to change the original gas flow field distribution, stabilize the flow field characteristics of the metering module and improve the metering precision of the ultrasonic gas meter, and has the characteristics of strong adaptability, convenience in installation and positioning, good flow field stability, high precision and the like.

This application belongs to the field of aero-engine technology, and specifically relates to a method and apparatus for simulating aircraft bleed air during sustained test of a turbofan engine, wherein the inlet temperature T1 and inlet pressure P1 of the engine are preset to a range; Step S2: Calculate the aircraft bleed air volume W fy The range, the total bleed air temperature T of the aircraft fy The range and total bleed air pressure P fy Range; Step S3: Calculate the cold diameter D of the bleed air nozzle. fy Range; Step S4: Select the cold-state diameter D of the bleed air nozzle fy An aircraft bleed air volume verification test was conducted to obtain the bleed air volume W for the test. fyr When the induced draft volume W in the experiment fyr The requirements are met, and the cold-state diameter D of the expiratory air nozzle is adopted. fy When the induced draft volume W in the experiment fyr If the requirements are not met, return to step S4; ensure that the calculation error of the aircraft bleed air volume is within the required range, and obtain the actual bleed air volume of the engine in various states to the maximum extent through test program design. This test method has the advantages of simple test method, low test cost and high replacement efficiency.

The invention discloses an ammonia gas catalytic cracker. The cracker comprises a shell and a corrugated coil pipe in the shell, a separation blind plate is arranged in the shell and is parallel to the bottom surface, and the internal space is divided into an upper half area and a lower half area; the corrugated coil pipe repeatedly penetrates through the separation blind plate; the pipe section, located above the separation blind plate, of the corrugated coil pipe is filled with an ammonia catalytic cracking catalyst, and the pipe section, located below the separation blind plate, of the corrugated coil pipe is not filled; an air inlet and an air outlet are formed in the two sides of the upper half area of the shell respectively, and a flue gas inlet and a flue gas outlet are formed in the two sides of the lower half area of the shell respectively; wherein the air inlet and the flue gas outlet are on the same side, and the air outlet and the flue gas inlet are on the same side; an inlet of the corrugated coil is connected with an ammonia pipeline, and an outlet is connected with a cracking gas pipeline. Part of ammonia gas is pre-cracked by utilizing the ammonia gas cracking catalyst, and heat is provided for cracking reaction in the corrugated coil pipe by utilizing flue gas waste heat, so that the adjustment of the combustion property of fuel gas is realized, and the possibility is provided for reducing fuel type NOx.

The utility model relates to the technical field of fire extinguishing, in particular to a portable fire extinguisher. Comprising a bottle body, a device head, a spray pipe, a pressure gauge, a pressure sensor, a handle and a switch assembly, a bottle opening of the bottle body is connected with the device head, the upper end of the device head is connected with the handle, the device head is further connected with the spray pipe, the pressure gauge and the pressure sensor, and the pressure gauge and the pressure sensor are arranged on the two sides of the spray pipe. The switch assembly penetrates through the device head, the switch assembly is used for controlling the communication condition of the spray pipe and the interior of the bottle body, the handle is used for driving the switch assembly, and the pressure sensor and the pressure gauge are used for measuring the pressure in the bottle body; the device head is communicated with the pressure sensor through a linear air guide pipe; when the pressure sensor carries out pressure measurement, the pressure loss is reduced, so that the pressure measurement precision can be improved.

The utility model discloses a kind of transverse three-cavity suction muffler, belong to refrigerator compressor technical field, including first shell and second shell, first shell connects first, second baffle, and the closed structure is spaced into first, second, third chamber along horizontal direction arrangement;Third chamber is between first chamber and second chamber;First shell is equipped with first, second, third flow guide pipe, first flow guide pipe is communicated with air inlet and first chamber, second flow guide pipe is communicated with first chamber and second chamber, and third flow guide pipe is communicated with second chamber and third chamber;Second chamber is connected with arc flow guide plate, and arc flow guide plate is towards second flow guide pipe and third flow guide pipe;Fourth flow guide pipe is equipped in third chamber and tightly first baffle, fourth flow guide pipe is communicated with third chamber and discharge port, and third flow guide pipe end top surface extension line is flush with fourth flow guide pipe bottom end. Solve the angle formed between different flow guide pipes in prior art, there is the problem of large local pressure loss.

The invention discloses a shot hole liquid injection type fracturing device and an operation method thereof, and relates to the technical field of fracturing devices.The device comprises a fracturing body, the fracturing body is provided with an inner sleeve and a rotating sleeve rotationally connected with the inner sleeve, the end, away from the well bottom, of the inner sleeve is open, and the end, close to the well bottom, of the rotating sleeve is closed; a liquid outlet hole is formed in the side wall of the rotating sleeve; the power unit is used for driving the rotating sleeve to rotate relative to the inner sleeve; the shot hole identification piece is connected with the rotating sleeve, and the shot hole identification piece is used for determining the position of a shot hole in a shaft casing; the insertion mechanism is provided with a telescopic pipe and a driving part, the telescopic pipe is communicated with the liquid outlet hole, and the driving part is used for driving the telescopic pipe to extend or retract. The telescopic pipe is driven by the driving piece to extend and be inserted into the shot hole, so that fracturing fluid is directly injected into the stratum through the telescopic pipe and the shot hole, the pressure loss of the fracturing fluid is reduced, and the fracturing effect is guaranteed.

The collector for the EGR cooler comprises an air outlet section, a collecting section and a connecting section, the air outlet section, the collecting section and the connecting section are sequentially connected, and the air outlet section, the collecting section and the connecting section are of an integrated structure. The air outlet section is cylindrical, and the connecting section is of a rectangular structure; an arc-shaped transition structure is arranged at the joint of the collecting section and the air outlet section, an arc-shaped transition structure is also arranged at the joint of the collecting section and the connecting section, and a temperature sensor interface and a differential pressure sensor interface are arranged on the collecting section. The cooler has the technical effects that the cooler can be formed by punching a thin plate, the wall thickness is small, the weight is light, the structure is simple, batch production can be realized, the manufacturing cost is low, arc-shaped transition structures are arranged at the joints of the sections, an internal airflow channel is smoother, the advancing resistance of waste gas in the using process is small, the pressure loss of the cooler can be reduced, and the conveying of the waste gas is facilitated; the collecting section is provided with a temperature sensor interface and a differential pressure sensor interface, so that a temperature sensor and a differential pressure sensor can be connected conveniently.

The invention discloses a heat storage catalytic combustion furnace for VOCs treatment, which comprises an oxidation chamber and three heat storage catalytic chambers, the heat storage catalytic chambers are communicated with an air distribution box for gas inlet and outlet, and a plurality of first guide plates and second guide plates for uniformly dividing gas channels into a plurality of areas are respectively arranged on the gas channels of the air distribution box and the oxidation chamber; a chamfer is arranged at the corner of the oxidation chamber; and the chamfer is a linear chamfer. And the surface of the second guide plate is parallel to the inclined surface of the closest chamfer. The air distribution box is provided with a divergent section with a gas channel gradually widened, and the first flow guide plate is arranged on the divergent section. The gas flow field uniformity in the device operation process can be improved, and then pressure loss is reduced.

The application relates to an aerodynamic profile suitable for a wind tunnel and a design method thereof, and belongs to the technical field of aviation aerodynamic wind tunnel tests. The front end surface of the aerodynamic profile is a square section, the rear end surface of the aerodynamic profile is a circular section, the middle part of the aerodynamic profile is a transition section, and the front and rear sections are connected through the change of the section shape from front to back. The research and development purpose is to provide a novel aerodynamic profile design method for the transition from a square section to a circular section, the flow field can be smoothly transitioned from a square to a circle, the influence on the flow field quality is minimized, the pressure loss is reduced, and the method of rounding the right angle and gradually increasing the rounding radius is adopted to realize the smooth transition from the square section to the circular section. The circular arc curve is gradually lengthened, the right angle side is gradually shortened, and finally the profile line is completely changed into a circular shape. The transition mode is natural and smooth, the change is gentle, the aerodynamic performance is good, and the interference on the flow field due to the change of the section shape can be obviously reduced.

This invention discloses a nitrogen-driven pneumatic directional drilling equipment for downhole cuttings removal in soft coal seams, comprising a nitrogen drive mechanism and a directional drilling rig. The directional drilling rig has a directional drill string assembly structure, which includes a drill rod. A probe outer tube is coaxially sleeved inside the drill rod, and a measuring probe is coaxially sleeved inside the probe outer tube. The measuring probe is used to measure the gas flow rate and pressure in the borehole. An annular downward air chamber for nitrogen gas flow is formed between the inner wall of the probe outer tube and the outer wall of the measuring probe. An air inlet is opened on the outer wall of the drill rod at the lower part, and an annular upward air chamber for nitrogen gas flow is formed between the inner wall of the drill rod above the air inlet and the outer wall of the probe outer tube. A trumpet-shaped wind shield, wider at the bottom and narrower at the top, is connected to the outer wall of the drill rod above the air inlet. This invention also discloses a corresponding borehole cuttings removal method. This invention significantly reduces the resistance to airflow, achieving faster drilling speeds and removing more cuttings under the same air volume and pressure.

The utility model relates to the technical field of cleaning, in particular to a water treatment system and device.The water treatment system comprises a water flow channel, a weakening module, an ozone generation module and a micro-nano bubble generation module which are sequentially arranged in the water flow direction of the water flow channel, the alkalescence module can make water become alkalescent, and the micro-nano bubble generation module can generate micro-nano bubbles into the water flow channel, so that ozone generated by the ozone generation module can be stored in the micro-nano bubbles. According to the utility model, water can be weakly alkalized, and the solubility of ozone in water can be increased through the cooperation of the micro-nano bubble generation module and the ozone generation module, so that the sterilization and decontamination capabilities are improved.

This utility model relates to a gas cooling and scrubbing tower, belonging to the field of gas purification technology. It includes a tower body, an air inlet, an air outlet, and a liquid outlet, located on the side, top, and bottom of the tower body, respectively. Between the air inlet and outlet within the tower body's internal cavity, a first spray device, a uniform flow water curtain layer, and a second spray device are sequentially arranged from bottom to top. The uniform flow water curtain layer includes a uniform flow water curtain baffle, and a water curtain regulating component is arranged above the baffle. This utility model utilizes the uniform flow water curtain baffle and the second spray device to repeatedly deflect, mix, cool, and scrub dust-laden gas, solving the problems of gas flow deviation, poor cooling and scrubbing effects in existing hollow cooling and scrubbing towers. It has the advantages of high scrubbing efficiency, low resistance, no clogging, simple structure, and easy maintenance.

A water diversion valve (WRRV) enables a user to install a separate water meter in its apartment, rather than as currently traditionally conventionally installed on the sky corridor or entrance outside the building. The installation cost is greatly reduced, installation is easier, necessary safety prevention measures are applied when a pipeline with the length of tens of meters is fixed to the wall of a high-rise building, and ugly appearance of the pipeline is avoided. The valve is a small tube, referred to as an inner tube (IT), made of brass (yellow copper and zinc alloy) or PVC, screwed into a larger tube, referred to as an outer sleeve (EJ). A movable part of a bathroom water stop valve (WSOV) will be removed, and the EJ will be tightly screwed into its position (i.e., it will be screwed into a fixed part in the wall). Water will flow from the fixed part of the WSOV to the interior of the IT and then to the water meter through some PVC connecting pipes, elbows and external stop valves. After the flow is measured, water will return to the EJ through the 1 / 2 inch slot and then flow back to the WSOV to supply water to the apartment or unit. The final purpose of the valve is to facilitate the installation of the water meter, so that each consumer can feel the true value of rare water resources of the country, and therefore the waste amount of water is reduced, especially in the Egypt country which is lack of fresh water and is faced with additional threats from the Niile source. In order to intuitively feel the loss caused by waste of water, an author estimates that the loss of Egypt per year is 15.5 billion dollars. The WRRV will be able to significantly reduce this loss.

The utility model relates to the technical field of refrigeration equipment, in particular to an air conditioner refrigeration throttling device. The pipe body is composed of a liquid inlet section, a throttling section and a liquid outlet section, the inlet of the liquid inlet section is provided with a filter screen, the middle of the liquid inlet section is provided with a throttling core for controlling flow, the throttling section comprises a throttling piece for accurately adjusting the flow, the inner diameter of the liquid outlet section is gradually increased, the flow velocity of fluid can be reduced, and pressure loss can be reduced; the tail end separating plate is provided with separating holes and liquid discharging grooves for further separating gas and liquid, buffering cavities are formed between the spiral blades and the separating plates, and connector threads are formed in the two ends of the pipe body. According to the device, through the gradually-expanding design of the inner diameter of the liquid outlet section and the synergistic effect of the flow guide blades, the spiral blades and the separation plates in the liquid outlet section, the effects of reducing the flow speed of a refrigerant and enhancing gas-liquid separation are achieved, and the overall efficiency and stability of a refrigerating system and the heat exchange efficiency of an evaporator are improved; the stable and efficient operation of the equipment is ensured; and the service life is prolonged.

This invention discloses a side-cooled gas turbine transition section and a gas turbine. The side-cooled gas turbine transition section includes an outer shell, an inner shell, and a baffle member. The inner shell is fitted inside the outer shell and spaced apart along the inner and outer directions to form airflow channels. The outer shell has an air inlet communicating with the airflow channels, so that cooling air flows into the airflow channels through the air inlet to reduce the temperature of the inner shell. The outer shell has a mounting hole penetrating the outer shell along its thickness direction, communicating with the airflow channels. The baffle member is disposed in the mounting hole to agitate the airflow flowing into the mounting hole. The ratio of the surface area to the volume of the baffle member is A1, and the ratio of the area to the volume of the sidewall of the mounting hole is A2, where A1 is greater than A2. At least a portion of the baffle member is located within the airflow channels and connected to the outer peripheral surface of the inner shell to improve the heat transfer coefficient of the inner shell. The side-cooled gas turbine transition section of this invention has the advantages of simple structure and good cooling effect.

The utility model discloses a hydraulic motor driving type wind power negative pressure seeding machine which comprises a bearing frame, two fans are installed at the lower end of the bearing frame, one end of each fan is connected with a hydraulic driving mechanism, the other end of each fan is connected with an air inlet pipe, and the air inlet pipe is connected with an air outlet pipe. The upper end of the air inlet pipe penetrates through the side wall of the bearing frame and extends to the upper end of the bearing frame, the upper end of the air inlet pipe is connected with a spiral air inlet structure, the middle of the air inlet pipe is connected with a discharging mechanism, and a filtering device is installed on the air inlet pipe. The hydraulic drive fan is matched with a hydraulic drive fan system of a high-horsepower tractor, protection on the hydraulic motor and turbine blades can be greatly improved in a sand and dust environment, the filtering effect can be improved, the service life of a hydraulic motor sealing piece and the service life of the turbine blades can be prolonged, and meanwhile cleaning is convenient and fast.

The invention relates to a humidifier and a manufacturing process of the humidifier. The humidifier (100) comprises a wound portion (10) surrounding a central axis (80) and comprising enclosures (12), a first of the enclosures comprising a first pair of semipermeable membranes (14) separated by a first spacer layer (16) to form one of the moisture channels (20), and a second of the enclosures comprising a second pair of semipermeable membranes (14) separated by a second spacer layer (18) to form one of the dry gas channels (22). The dry gas channel (22) is configured to receive a dry gas (52) through at least a portion of the first face region (24) of the wrap portion and in an axial direction along the dry gas channel. The moisture channel (20) is configured to receive a moisture gas (50) through at least a portion of a second face region (26) of the wound portion and in an axial direction along the moisture channel, the second face region (26) being opposite the first face region (24).

An air filter media is provided, comprising multiple layers of nonwoven fabric, with a performance index of 0.023 or higher. At least one layer of the nonwoven fabric contains at least two types of organic fibers, A and B, with different fiber diameters. The average fiber diameter of organic fiber A is 0.01–0.60 μm, and the average fiber diameter of organic fiber B is 1.0–30 μm. This provides an air filter media suitable for air filters that combine high capture efficiency with low pressure loss.