37 results about "Mechanical fan" patented technology

A convertible ducted fan engine and mounting system. The convertible ducted fan engine has a shroud encircling a mechanical fan. The convertible ducted fan engine includes a fluid-propulsion configuration in which the mechanical fan rotates freely with respect to the shroud to produce thrust through fluid flow, and a drive-wheel configuration in which the shroud rotates about the rotational axis.

One aspect of the invention relates to a method for measuring the power of the fan of a turbomachine comprising a drive shaft and a fan shaft, and in particular a method for measuring fan power using only one sensor from among a fan shaft speed sensor and a drive shaft speed sensor, the other speed being modeled from the measurement of the first speed. Figure to be published with the abstract: Figure 5

The present invention relates to a novel ventilation structure for BIPV modules, which comprises photovoltaic modules matched with a building wall, the back of the photovoltaic modules is installed on the facade of the building wall in parallel through a plurality of steel columns, a ventilation gap is formed between the photovoltaic modules and the building wall, an air inlet passage for forming a constricted air inlet is transversely inserted in the bottom of the ventilation gap, and an air outlet chimney as an air outlet is longitudinally inserted in the top of the ventilation gap. The air duct between the photovoltaic modules and the building wall is modified, the natural convection in the ventilation gap can be accelerated to a high wind speed level similar to that of forced convection without requiring any mechanical fan device, enhancing the ventilation cooling of the BIPV modules without increasing power consumption.

The invention relates to the technical field of civil construction engineering, and discloses a ventilation and smoke exhaust system and method for a long-distance underwater public-rail combined shield tunnel. Comprising a jet fan, a rail transit middle air shaft machine room, a middle air shaft mechanical fan, a rail transit fan room, a rail transit interval mechanical fan, a highway tunnel air exhaust and smoke exhaust fan, a highway tunnel fan room, a highway tunnel centralized air exhaust / smoke exhaust valve, a highway tunnel smoke exhaust control valve, a rail transit piston air shaft and a rail transit mechanical air shaft. The system comprises a highway tunnel exhaust tower, a rail transit discharge flue, a highway tunnel exhaust air duct, a special highway tunnel exhaust port, a highway tunnel centralized exhaust valve, an uplink middle air shaft mechanical air valve, a downlink middle air shaft mechanical air valve, a rail transit exhaust air duct, a highway tunnel exhaust air duct and a rail transit interval mechanical air valve. According to the method, targeted smoke exhaust measures can be taken for fire disasters at different positions of the long-distance underwater public-rail combined shield tunnel, and rapid exhaust of smoke is ensured.

Variable pitch fan blade (8a) for an unfaired turbomachine fan, the blade (8a) comprising an aerodynamic blade (9) and a base (10), the blade (9) comprising a recess opening simultaneously onto the upper and lower surfaces (14) and a leading edge (15) of the blade (9), the blade (8a) further comprising a measuring device (26) housed in the recess and clipped onto the blade (9), the measuring device (26) comprising a streamlined body (28) whose outer surface (29) is complementary to the outer surface (30) of the blade (9) to ensure aerodynamic continuity, the body (28) carrying at least one measuring instrument (31) configured to measure at least one parameter of an airflow upstream of the blade (9). Figure for the abstract: 2

The present invention relates to the technical field of tunnel ventilation, and discloses a ventilation and smoke exhaust system and method for a long-distance underwater road-rail combined immersed tube tunnel. The system includes: a jet fan, a rail transit intermediate air shaft machine room, an intermediate air shaft mechanical fan, a rail transit fan room, a rail transit section mechanical fan, a highway tunnel exhaust and smoke exhaust fan, a highway tunnel fan room, a rail transit piston air shaft, a rail transit mechanical air shaft, a highway tunnel exhaust tower, a highway tunnel smoke exhaust duct, a highway tunnel special smoke exhaust port, a smoke exhaust control valve 1, a smoke exhaust control valve 2, an upward line intermediate air shaft mechanical air valve, a downward line intermediate air shaft mechanical air valve, a rail transit civil engineering air duct, and a rail transit section mechanical air valve. The present invention can take targeted smoke exhaust measures for fires occurring at different locations of a long-distance underwater road-rail combined immersed tube tunnel, ensure rapid exhaust of smoke, and reduce harm to passengers and rescue personnel.

This invention discloses an emergency engagement structure for a fan clutch, relating to the field of engine cooling technology. It addresses the problem in mechanical fans with clutches where leakage of transmission oil within the clutch causes the fan to lose power and stop, leading to diesel engine overheating and shutdown. The emergency engagement structure includes a drive shaft, a driven shaft, and an engagement unit. The drive shaft is connected to the engine, and the driven shaft is mounted on the fan. The drive shaft transmits rotation to the driven shaft and the fan via transmission oil. The engagement unit is located within the hollow portion of the driven shaft and serves to rigidly connect the driven shaft to the drive shaft. The actuator of the engagement unit is an electric actuator that pushes a cylindrical pin through a through-hole in the side wall of the driven shaft, abutting against the drive shaft. This achieves a rigid connection between the driven and drive shafts, allowing the fan to continue operating without relying on transmission oil and preventing diesel engine overheating.

The invention provides temperature-control forming and frying equipment for green tea, and relates to the technical field of frying equipment, the temperature-control forming and frying equipment comprises a mechanical fan, a heating unit is arranged below the mechanical fan, a ventilation filter screen is arranged below the mechanical fan, threaded protrusions can be arranged in the ventilation filter screen, and a green tea frying roller is arranged in the ventilation filter screen; the device comprises a green tea stir-frying roller, a stirring plate is arranged in the green tea stir-frying roller, two windows are symmetrically formed in the green tea stir-frying roller, and a heating coil is arranged on the circumferential surface of the green tea stir-frying roller. Intermittent communication of the window is achieved through rotation of the roller, when the roller rotates, the window rotates along with the roller and forms periodic connection and disconnection with the shell window, hot air driven by the mechanical fan is blown in through the shell window and the roller window during communication to push green tea to turn over so as to guarantee uniform heating, and direct blowing of the hot air is reduced during disconnection.

The present invention relates to the technical field of civil engineering, and discloses a ventilation and smoke exhaust system and method for a long-distance underwater road-rail combined shield tunnel, including: a jet fan, a rail transit intermediate air shaft machine room, an intermediate air shaft mechanical fan, a rail transit fan room, a rail transit interval mechanical fan, a highway tunnel exhaust and smoke exhaust fan, a highway tunnel fan room, a highway tunnel centralized exhaust / smoke exhaust valve, a highway tunnel smoke exhaust control valve, a rail transit piston air shaft, a rail transit mechanical air shaft, a highway tunnel exhaust tower, a rail transit smoke exhaust duct, a highway tunnel smoke exhaust duct, a highway tunnel dedicated smoke exhaust port, a highway tunnel centralized smoke exhaust valve, an upward line intermediate air shaft mechanical air valve, a downward line intermediate air shaft mechanical air valve, a rail transit smoke exhaust duct, a highway tunnel exhaust duct and a rail transit interval mechanical air valve. The present invention can take targeted smoke exhaust measures for fires occurring at different positions in a long-distance underwater road-rail combined shield tunnel, and ensure the rapid discharge of smoke.

To provide a ventilation structure for a hold where an opening of a hatch in a cargo vessel is made large and ventilation facility is not easily damaged when loading cargo.SOLUTION: In a cargo vessel including a wave shaped partition wall 40 having corrugated irregularities on a cross-sectional configuration for partitioning between two holds CH, and wind-up type hatch covers 7A, 7B opening / closing hatch coamings provided in top units of each hold, a mechanical blower 50 is installed on a hatch coaming deck 3A in a space between a hatch coaming 20 and another hatch coaming 30, and height of the mechanical blower 50 is lower than the height of the hight of the hatch coamings 20, 30. Opening area of the hatch can be enlarged by installing the mechanical blower 50 by using dead space on an upper deck. In addition, since the height of the mechanical blower 50 is lower than the height of the hatch coamings 20, 30, accidents such as damage by coming into contact with cargo when loading the cargo can be prevented.SELECTED DRAWING: Figure 1

The utility model relates to an electro-hydraulic combined control flow valve which comprises a valve body, a first control assembly, a second control assembly, an oil inlet and an oil drainage port are arranged in the valve body, the first control assembly comprises a valve rod, an oil inlet hole is formed in the side face close to one end of the valve rod, the oil inlet hole of the valve rod is communicated with the oil inlet, and an oil outlet is formed in the other end of the valve rod. The space at one end of the oil outlet of the valve rod is communicated with a second control assembly through an oil way, the second control assembly is communicated with an oil drainage port, and the oil drainage port is communicated with the space on the outer side of the valve rod. According to the electro-hydraulic combined control flow valve, compared with a traditional cooling system, the plunger pump can rapidly adjust the rotating speed of the fan according to electric signals and needs, the phenomenon of supercooling or superheating caused by a fixed rotating speed cooling mode of a traditional mechanical fan is avoided, the cooling effect is greatly improved, waste of energy consumption of an engine is avoided, and the service life of the engine is prolonged. And an energy-saving mode of providing on demand is achieved.

Cooking appliance (1) for cooking on wood, comprising: - a housing (50) having a housing base (51) and one or more housing side walls (52), wherein the housing base (51) has an opening (53); - a combustion chamber (10) arranged within the housing (50) and having a combustion chamber base (12) and one or more side walls of the combustion chamber (15), wherein the side walls of the combustion chamber (15) comprise, in an upper region, a number of air inlets (11) designed to suck air into the combustion chamber (10), - an intermediate space (20) arranged between the housing (50) and the combustion chamber (10); - an air distribution chamber (70) located within the housing and below the combustion chamber (10), the air distribution chamber (70) being in open communication with the intermediate chamber (20); - a mechanical fan (30) arranged beneath the housing and designed to generate an air flow through the opening in the housing base through the air distribution space to the intermediate space, wherein the combustion chamber base (12) has a number of air inlets (13) for drawing air from the air distribution chamber (70) into the combustion chamber (10), and wherein the side walls of the combustion chamber (15) have, in a lower region, a number of openings (14) designed for the discharge of wood gas from the combustion chamber (10) into the intermediate space (20), at least during use, wherein the combustion chamber (10) is box-shaped, and wherein the side walls of the combustion chamber (15) are rectangular and the housing side walls (52) are rectangular.

The invention discloses an off-road vehicle cooling system carrying a DHT hybrid gearbox and a control method, and the off-road vehicle cooling system comprises an engine, the DHT gearbox, a DHT motor controller, and a mechanical fan driven by a wheel train at the front end of the engine. An engine radiator connected with the engine through a pipeline, a DHT radiator connected with the DHT gearbox and the DHT motor controller through pipelines and an air conditioner condenser are sequentially arranged in front of the mechanical fan, and one or more electronic fans are arranged in front of the air conditioner condenser. The mechanical fan and the electronic fan are selectively started or simultaneously started, the rotating speed of the mechanical fan and the rotating speed of the electronic fan are controlled, air cooling is conducted on the engine radiator, the DHT radiator and the air conditioner condenser, and the heat dissipation requirements of the off-road vehicle carrying the DHT hybrid gearbox in different working modes are met.

An assembly of a turbomachine fan casing (2) and a nacelle air duct (3), the turbomachine extending along a longitudinal axis (X) and comprising a fan mounted to rotate about the longitudinal axis (X) so as to accelerate an upstream to downstream airflow, the fan casing (2) comprising an upstream flange (21) connected to a downstream flange (31) of the air duct (3) by a plurality of mechanical components (4). The assembly comprises at least one stiffening element (5), positioned radially outside the air duct (3) and the fan casing (2), the stiffening element (5) having a U-shape defining a base (50), an upstream arm (51) and a downstream arm (52), the upstream arm (51) being connected to the downstream flange (31) and the downstream arm (52) being connected to the upstream flange (21). Figure from the summary: Figure 4

The invention discloses a refrigerator refrigeration cycle system which comprises an air duct cover plate, a power module, an ion generator module and an electrode, an air outlet and an air return port are formed in the air duct cover plate, a refrigerator main control panel is electrically connected with the power module, and the refrigerator main control panel can control on-off of the power module. The power module is connected with the input end of the ion generator module and used for supplying power to the ion generator module, the ion generator module is used for converting low voltage into high voltage to be output, the output end of the ion generator module is electrically connected with the electrode, and the electrode is installed at the air outlet through the insulating support. Air near the electrode is ionized under the action of high voltage to generate charged ions, and ion flow is formed based on the interaction between the ions and drives the air to flow. According to the system, ion wind replaces a mechanical fan to achieve air circulation in a refrigerator chamber, no mechanical moving part is arranged, noise pollution is reduced, meanwhile, part loss is reduced, and the response speed is high.

The utility model discloses a swing which comprises a support, a hanging rod and a seat, a cross beam is arranged at the top of the support, a rotating sleeve is fixedly connected to the upper end of the hanging rod and rotationally connected with the cross beam, the seat at the lower end of the hanging rod is fixedly connected, and a mechanical fan is installed on the cross beam and comprises a one-way rotating transmission device, a fan rotating shaft and fan blades. The input end of the one-way rotating transmission device is fixedly connected with the rotating sleeve, the output end of the one-way rotating transmission device is fixedly connected with the fan rotating shaft, the fan rotating shaft is rotationally installed on the cross beam, and the fan blades are fixedly installed at the lower end of the fan rotating shaft. When the swing starts to swing under the pushing of a user, the rotating sleeve rotates along with the swing, and then the one-way rotating transmission device is driven to enable the fan rotating shaft and the fan blades to rotate. In this way, the swinging motion of the swing is converted into the rotating power of the fan, even if a user stops swinging, the fan can still keep rotating for a period of time, and the using comfort of the swing is improved.

The utility model discloses purification equipment with a self-cleaning function, and belongs to the technical field of purification equipment.The purification equipment comprises a box body, a filter plate is arranged in the center of the interior of the box body, the interior of the box body is divided into a filter cavity and an adsorption cavity through the filter plate, and threaded rods are rotationally arranged at the two ends of the top wall of the side, close to the filter plate, of the filter cavity; a motor for driving one of the threaded rods to rotate is fixedly mounted at the top of the box body, the two threaded rods are jointly sleeved with a scraping plate, and vent holes are formed in the two sides, away from the filter plate, of the side wall of the box body. According to the purification equipment with the self-cleaning function, the motor drives the threaded rod to rotate, then the scraping plate is driven to conduct scraping cleaning on the filter plate, the transmission assembly drives the mechanical fan to rotate, auxiliary inlet air is provided for the box body, and compared with an existing device, the problem that the filter plate in the equipment needs to be manually taken down and cleaned is solved; and the use efficiency of the purifier is improved.

This invention discloses an ultra-thin micro mechanical fan and its assembly method, comprising a base, a rotor assembly, and a stator assembly. A central tube is integrally injection-molded from the upper surface of the base. The rotor assembly includes a shaft core and fan blades, with the shaft core inserted into the central tube and the fan blades sleeved outside the shaft core. The stator assembly includes a PCB stator board. An annular limiting groove is provided around the outer periphery of the base, and the PCB stator board is installed and fixed within the annular limiting groove. A solder pad structure is provided at the end of the PCB stator board away from the fan blades. The central tube, integrally injection-molded from the base and used as a bearing, and the annular limiting groove directly install and fix the PCB stator board. The PCB stator board replaces the self-adhesive coil stator. This eliminates the wall thickness space of the oil-impregnated bearing itself and the wall thickness superposition space required for the base central tube and bearing to fit together, while also eliminating the traditional FPC flexible circuit board and adhesive backing structure, saving the axial thickness of the FPC and adhesive backing.

The invention relates to the technical field of tunnel ventilation, and discloses a ventilation and smoke exhaust system and method for a long-distance underwater public rail combined immersed tube method tunnel. The system comprises a jet fan, a rail transit middle air shaft machine room, a middle air shaft mechanical fan, a rail transit fan room, a rail transit interval mechanical fan, a highway tunnel exhaust and smoke exhaust fan, a highway tunnel fan room, a rail transit piston air shaft, a rail transit mechanical air shaft, a highway tunnel exhaust tower and a highway tunnel smoke exhaust duct. The system comprises a smoke exhaust port special for a highway tunnel, a smoke exhaust control valve I, a smoke exhaust control valve II, an uplink middle air shaft mechanical air valve, a downlink middle air shaft mechanical air valve, a rail transit civil engineering air duct and a rail transit interval mechanical air valve. Targeted smoke exhaust measures can be taken aiming at fire disasters occurring at different positions of the long-distance underwater highway-rail combined immersed tube method tunnel, rapid exhaust of smoke is ensured, and harm to passengers and rescue workers is reduced.

The application provides a heat management system and method for a commercial vehicle, which utilizes the characteristic of large heat dissipation of the intercooling system in the commercial vehicle, increases the heating of the battery and driving by the waste heat of the intercooling system, and further reduces the heating energy consumption. Meanwhile, the double-input power takeoff is used to couple the mechanical fan, the motor and the engine driving shaft at the same time, and the fan is driven to operate by the motor only when the motor or the battery needs to be cooled, and the fan is driven to operate by the engine when the engine needs to be cooled, which can reduce the number of fans, improve the system integration and save the front end layout space of the vehicle. Meanwhile, the energy saving performance is considered, the double-input power takeoff can be provided with a multi-gear transmission ratio adjustment function, the transmission speed ratio is dynamically adjusted according to the heat load and the input end speed, so that the fan operates at a suitable speed.

The present invention relates to a novel ventilation structure for BIPV modules, which comprises photovoltaic modules matched with a building wall, the back of the photovoltaic modules is installed on the facade of the building wall in parallel through a plurality of steel columns, a ventilation gap is formed between the photovoltaic modules and the building wall, an air inlet passage for forming a constricted air inlet is transversely inserted in the bottom of the ventilation gap, and an air outlet chimney as an air outlet is longitudinally inserted in the top of the ventilation gap. The air duct between the photovoltaic modules and the building wall is modified, the natural convection in the ventilation gap can be accelerated to a high wind speed level similar to that of forced convection without requiring any mechanical fan device, enhancing the ventilation cooling of the BIPV modules without increasing power consumption.

The invention relates to a blower module (3) comprising: - a blade pitch control system (96) comprising: - at least one safety device (97) comprising a safety member movable in translation about the longitudinal axis (X) and movable between: a first position (P1) in which the body (54) of the actuator (52) is free to move between its flag and pitch positions, and a second position (P2) in which the body (54) of the actuator (52) is driven towards the flag position and free to move along a limited stroke relative to a defined stroke between the flag and pitch positions, - a drive device (98) for the safety member, and - a control device (99) for the drive device (98). Illustration figure: 2

The utility model discloses a heat dissipation structure of a high-power dual-purpose fuel mute type generator set, and belongs to the technical field of dual-purpose fuel generator sets. According to the utility model, a box type built-in sound-absorbing cotton design is adopted, so that rainproof and mute effects can be achieved; a rotor fan is arranged at a generator driving end, a mechanical fan is arranged on an engine water pump wheel, and an electronic fan on a radiator assembly is matched with an air inlet and an air outlet on a case to meet the radiating requirement; a control panel system, an engine pressure reducing valve and a scavenging air valve are axially arranged, an engine, a generator and a heat dissipation assembly are axially arranged, an engine air filter and a 12V storage battery are arranged up and down and then are axially arranged with an engine silencer, and the internal space of a unit is fully utilized, so that the unit is compact in layout and smaller in size; in the running process of the unit, the engine ECU can automatically switch the fuel state by judging whether the engine rotating speed, the water temperature and the fuel gas pressure reach target values or not, and the conditions of engine rotating speed fluctuation, even shutdown and the like cannot be caused.

The invention relates to the field of electrical equipment, and discloses a main and auxiliary engine indirect air cooling system arranged on the same tower, an indirect cooling tower is a natural ventilation indirect air cooling tower, a cooling sector comprises a main engine cooling sector and an auxiliary engine cooling sector, and the auxiliary engine cooling sector is an independent sector capable of being withdrawn and started and stopped; a plurality of main engine cooling sectors and one or more auxiliary engine cooling sectors are sequentially arranged in the indirect cooling tower along the circumference, a plurality of radiators are arranged at the bottoms of the cooling sectors of the indirect cooling tower, and shutters capable of being automatically adjusted along with the temperature are arranged on the peripheries of the cooling sectors of the indirect cooling tower; the circulating water system comprises a water pipe mother pipe and a cooling sector water pipe system, the water pipe mother pipe is circumferentially arranged along the sector in the indirect cooling tower, the cooling sector water pipe system is communicated with equipment in the cooling sector and the water pipe mother pipe, and each pipeline is provided with a valve; and each system in the circulating water system provides corresponding supporting facilities for the main machine and the auxiliary machine respectively. The main cooling system and the auxiliary cooling system are arranged on the same tower, a mechanical fan is replaced with natural ventilation, and energy conservation and emission reduction can be achieved.

The invention relates to a fairing housing (200) for a fan blade for an aircraft turbomachine, this housing having an annular shape around a longitudinal axis (A) and having at its axial ends annular fixing flanges (2041, 2042), respectively upstream (2041) and downstream (2042), the housing being made of composite material and comprising a preform made by weaving warp (FC) and weft (FT) yarns, and a polymer matrix in which this preform is embedded, characterized in that, between an intermediate section (202a) and at least one of the flanges, the housing (200) comprises another section (202b) of which at least a part of the warp yarns are made from fibers in a first material of a first stiffness, and the rest of the warp yarns are made from fibers in a second material of a second stiffness greater than that of the first material. Figure for the abbreviation: Figure 3

The present invention discloses an automatic radiator cleaning system and method for an off-road vehicle. The vehicle-mounted system comprises a conversion gear train, an electromagnetic telescopic valve, a mechanical fan, a washing pot, a wind pressure sensor and a water pump. The conversion gear train is connected to the engine for transmitting power to the mechanical fan. A forward gear set and a reverse gear set are arranged in the conversion gear train. The two gear sets are used alternately to change the direction of power output from the conversion gear train to the mechanical fan, thereby achieving a better cleaning effect. A detergent solution is stored in the washing pot. Before the mechanical fan works, the detergent solution is pumped to a nozzle at the end through a water pipe by a water pump. The high-pressure water flow is finally sprayed onto the radiator to wet and clean the dust thereon. The wind pressure sensor can detect the wind pressure near the radiator to help people in the vehicle determine whether the radiator is attached with too much dust and is blocked, thereby solving the problems of poor cleaning effect of the vehicle radiator and inability to monitor the radiator performance in real time.

The invention relates to an inlet cone (9) for an aircraft turbomachine fan mounted to rotate about an axis of rotation (R), comprising an upstream cone (1) fixed by at least one first fixing screw (4) to a downstream ferrule (2), said first fixing screw (4) being configured to fit into a first threaded orifice (40) formed partly in said upstream cone (1) and in said downstream ferrule (2), and opening into a channel (39) machined on said upstream cone (1). According to the invention, the inlet cone (9) also comprises a cover (3) configured to fit onto said upstream cone (1) so as to close said channel (39), the upstream cone (1), the downstream ferrule (2), and said cover (3) together forming a substantially continuous external surface of said inlet cone (9). Figure 5

The invention relates to providing a pyrolysis process for producing pyrolysis coke from organic material, which process functions continuously and is scalable. The pyrolysis takes place in a rotary kiln (2) by direct contact with a hot gas as the thermal transfer medium without the addition of an agent for partial oxidation, wherein the hot gas is generated in a combustion chamber (6) by combusting pyrolysis gas, wherein the combustion air is preheated in an air preheater (10) in order to ensure ignition. In the process, the hot gas is generated as a thermal transfer medium in a combustion chamber (6) by partially combusting a partial amount of the pyrolysis gas with a controllable amount of preheated air; is added to the rotary kiln at the coke discharge; and is conveyed through the rotary kiln counter to the flow of the material to be pyrolysed, the feedstock (1). The partial flow of pyrolysis gas to be partially combusted is removed from the overall flow immediately after the pyrolysis, that is to say after charging (3) the feedstock, and is conveyed by means of a conveyor element (5), steam ejector or mechanical fan to the combustion chamber (6). The air is pre-heated advantageously by the exhaust gas of the remainder of the pyrolysis gas to be combusted in the combustion chamber (7) in the flue-gas air pre-heater (10). The feedstock to be pyrolysed can be, but does not have to be, pre-dried.

The present application discloses a subway tunnel ventilation system and a control method thereof, which are used for a tunnel in a slope section. The subway tunnel ventilation system includes a station tunnel ventilation unit and an interval tunnel ventilation unit. The station tunnel ventilation unit includes a hot air exhaust path and a first connecting air path communicating with the hot air exhaust path. The hot air exhaust path is provided with a hot air exhaust fan. The interval tunnel ventilation unit includes a piston air path and a mechanical air path that can both communicate with the station tunnel ventilation unit. The piston air path and the mechanical air path are respectively arranged at both ends of the station. The mechanical air path is provided with a tunnel fan. By adjusting the quantity ratio of the mechanical fans on the upper side and the lower side of the slope section, the difference in the ventilation volume required in different ventilation directions for a tunnel fire in the slope section is matched, the number of tunnel fans is reduced, and the construction cost of the subway tunnel ventilation system is lowered. When a tunnel fan fails, the hot air exhaust path replaces the mechanical air path where the faulty tunnel fan is located, improving the application range and stability of the subway tunnel ventilation system.