1721 results about "Pressure reduction" patented technology

The invention relates to the technical field of underwater vehicle drainage, and discloses an air and carbon dioxide linkage drainage device and an underwater vehicle, the air and carbon dioxide linkage drainage device comprises a power unit, an air unit, a pressure reduction unit and a flow guide assembly, and the power unit is provided with a first storage cavity; the first storage chamber is used for storing liquid carbon dioxide, the air unit is provided with a second storage chamber, the second storage chamber is used for storing high-pressure air, the pressure reduction unit is provided with a pressure reduction chamber, the first air inlet is communicated with the pressure reduction chamber, the first air outlet is communicated with the water ballast space, and a first heating source is arranged in the second storage chamber; the heating source is suitable for generating heat after receiving the signal so as to heat the air stored in the second storage chamber. The technical problems that in the air release process and when the air is in contact with water, the temperature is reduced, so that the volume of the air is reduced, and the drainage capacity of the air and carbon dioxide linkage drainage device is reduced are solved.

The invention relates to the technical field of underwater vehicles, in particular to a modular supercritical carbon dioxide phase change drainage device and an underwater vehicle. The modular supercritical carbon dioxide phase change drainage device comprises a plurality of power unit sets, a plurality of pressure reduction units and a flow guide assembly, each power unit set comprises a plurality of power units, each power unit is provided with a first storage cavity, and the first storage cavity is used for storing liquid carbon dioxide; the plurality of pressure reduction units are in one-to-one correspondence with the plurality of power unit groups, each pressure reduction unit is provided with a pressure reduction chamber, the pressure reduction chambers selectively communicate with the corresponding first storage chambers, and the pressure reduction chambers of the plurality of pressure reduction units communicate with one another; the flow guide assembly is provided with a first air inlet and a first air outlet, the first air inlet communicates with at least one of the multiple pressure reduction cavities, and the first air outlet communicates with the water ballast space. The modular supercritical carbon dioxide phase change drainage device is small in occupied space, safe, efficient and high in drainage capacity.

The invention discloses a porous ejector, a use method thereof and a fuel cell system, and belongs to the technical field of fuel cells. Comprising a shell, a cavity is formed in the shell, and the cavity comprises a suction cavity, a mixing chamber, a second flow stabilizing chamber and a diffusion section which are sequentially arranged; a nozzle body is mounted in the suction cavity and is used for accelerating and depressurizing the driving fluid and spraying the accelerated and depressurized driving fluid into the suction cavity to form a negative pressure area; an ejection opening is formed in the side wall, corresponding to the suction cavity, of the shell and used for introducing an ejection fluid, and the ejection fluid and the driving fluid subjected to acceleration and pressure reduction are mixed in the mixing chamber; a nozzle assembly is arranged at the end, close to the mixing chamber, of the nozzle body and comprises at least one nozzle, and driving fluid is accelerated through a hole channel of the nozzle. The invention provides a porous ejector, a use method thereof and a fuel cell system, and solves the technical problems of low fuel injection efficiency and insufficient energy utilization of a single-hole ejector used in a traditional hydrogen supply system.

In a segmented ball valve for low noise and anti-cavitation applications, a replaceable cartridge is fixed inside and retained by stem and end post. The segment has a machined cylindrical bore with a slide-fit noise cartridge, enabling field replaceability with minor effort & without need of welding or fasteners. The replaceable cartridge also enables use of a fully cylindrical cartridge with greater pressure reduction stages compared to welded-on noise plates on the segment. The segment has a flattened front face resulting in lower Fd enabled by dual flow path in lower openings values thereby attaining higher noise attenuation where the cartridge is not required. The curved plates of the low noise and anti-cavitation cartridge enable: expanding flow resulting in non-impinging jet streams thereby achieving higher noise attenuation in one direction; and converging flow in the opposite direction resulting in reduction of flow energy, and the potential for cavitation for liquids.

The invention discloses a medical instrument sealing performance detection device with an intelligent sensor, and relates to the technical field of sealing, the medical instrument sealing performance detection device comprises a sealing tank, a detection device and a pressure reduction device, and the top of the sealing tank is provided with a sealing cover; wherein the detection device comprises a conveying pipe, an air exhaust box, an air exhaust machine, a first sliding groove, an air pressure rod, an L-shaped short rod, a spiral rod and an activated carbon plate, the output end of the air exhaust machine moves downwards to evacuate air in the sealing tank, when the air in the sealing tank is evacuated, the air pressure rod is driven to move towards the interior of the sealing tank, and whether the air pressure rod moves or not is observed; the air pressure rod moves towards the interior of the sealing tank, the sealing performance is good, and no leakage is generated, the conveying pipe fixedly penetrates through the surface of the sealing tank, the air exhaust box is fixedly installed at the bottom of the conveying pipe, a conveying belt of the air exhaust box is provided with a groove, through rotation of the activated carbon plate, the surface area between contact harmful gas and activated carbon can be increased, and the adsorption efficiency is improved.

The invention discloses an electric propulsion high-pressure fluid micro-flow control system and belongs to the technical field of electric propulsion flow control. The problems that an existing pressure reduction system is poor in control precision and low in reliability when working frequently are solved. An outlet of a gas cylinder is connected with a gas inlet of a proportional valve through a gas transmission channel, and a self-locking valve and a pressure adjusting system are sequentially arranged on the gas transmission channel; the proportional valve is connected with three third electromagnetic valves at the same time and is respectively used for controlling the on-off of the anode branch, the cathode branch A and the cathode branch B; the pressure sensor PIII is arranged at an air outlet of the proportional valve and used for collecting the pressure of the air outlet of the proportional valve; the pressure adjusting system collects the pressure of the gas transmission channel and sends the pressure to the controller, and the controller controls the pressure adjusting system, the proportional valve and the three third electromagnetic valves according to the pressure of the gas transmission channel, the pressure of the pressure sensor PIII and the working mode of the system. The method is suitable for electric propulsion system control.

The invention relates to the technical field of fluid control and management, in particular to a multi-stage pressure and noise reduction regulating valve which is characterized in that a fluid channel is arranged in a valve body and comprises a fluid outlet and a fluid inlet; the valve seat comprises a multi-layer valve cylinder and a first opening, a first throttling hole is formed in the multi-layer valve cylinder, and the first throttling hole communicates with the fluid inlet; the valve cage is fixedly connected with the valve seat and comprises a multi-layer valve wall and a first through hole, one end of the first through hole is connected with the first open hole, and the multi-layer valve wall is provided with a second throttling hole communicated with the fluid outlet; the valve cover is fixedly connected with the valve body; the valve plug is slidably arranged in the cavity; the valve rod is fixedly connected with the valve plug and arranged in the second through hole in a sliding mode. The valve cylinders and the valve walls are each provided with three layers, the first throttling holes in every two adjacent valve cylinders are arranged in a staggered mode, and the second throttling holes in every two adjacent valve cages are arranged in a staggered mode. Through the multiple layers of valve cylinders and the staggered throttling holes in the valve wall, the frequency of bubble formation and collapse is reduced, and fluid noise and the erosion risk of equipment are reduced.

A fuel pressure controller includes processing circuitry that executes a first process, a second process, and a third process as a fuel pressure reduction control. The first process includes closing both a first electromagnetic valve and a second electromagnetic valve. The second process includes adjusting the pressure of the fuel supplied to a fuel injection valve by repeatedly performing an opening and closing operation of the second electromagnetic valve. The third process includes, when the fuel pressure in a fuel pipe between the first electromagnetic valve and the second electromagnetic valve reaches a prescribed pressure, stopping the opening and closing operation of the second electromagnetic valve to maintain the second electromagnetic valve in an open state, and repeatedly performing the opening and closing operation of the first electromagnetic valve to adjust the pressure of the fuel supplied to the fuel injection valve.

The disclosure relates to a segmented ball valve for low noise and anti-cavitation applications, wherein a replaceable cartridge may be fixed inside and retained by stem and end post. The cartridge may incorporate irregular or regular polygonal-shaped plates or a combination of polygonal shaped plates and round bars facilitating staged pressure reduction and effectively mitigating or eliminating the occurrence of high-intensity cavitation and noise. The segment may have a precisely machined cylindrical bore designed to accommodate a slide-fit anti-cavitation and noise reduction cartridge; this allows for convenient field replaceability of the cartridge with minimal effort, eliminating the need for welding or fasteners to affix it to the segment. This cartridge may also facilitate the utilization of this fully cylindrical bore inside the segment for incorporating a greater number of pressure reduction stages compared to the currently available designs.

The invention provides a thermodynamic equilibrium simulation analysis method and system, and relates to the technical field of data processing, and the method comprises the steps: 1, building a steam thermodynamic equilibrium model based on the technological parameters of a thermodynamic network; 2, analyzing a thermal distribution state through a steam thermal equilibrium model, identifying an unbalance factor in a process chain, and establishing a four-vertex geometric topological relation among a heat exchanger inlet / outlet, a pressure reduction module and a drain valve process node according to the physical layout of a thermal network; and step 3, based on the dynamic proportion characteristic of the four-vertex geometric topological relation, calculating a thermal correction factor, and adjusting the heat transfer coefficient, the steam pressure and the condensate water temperature parameter of the steam thermal equilibrium model according to the thermal correction factor to obtain the corrected steam thermal equilibrium model parameter. According to the method, through dynamic correction of model parameters and simulation optimization, accurate identification and dynamic regulation and control of thermal unbalance are realized, a closed loop for optimized feedback is formed, and the operation efficiency and stability of a thermal system are improved.

The invention relates to the technical field of material transportation, in particular to a conveying pressure control method and device of a powder and particle pneumatic conveying system. The method comprises the steps that the material humidity, the conveying pressure and the air speed of a frequency conversion fan are obtained; determining a humidity adjusting coefficient; in the pressurization stage, a suppression coefficient is determined according to the current wind speed and the target wind speed; according to the humidity adjustment coefficient and the inhibition coefficient, inhibiting the proportionality item to obtain a target proportionality coefficient; enhancing the differential term in combination with the humidity adjustment coefficient and the pressure deviation to obtain a target differential coefficient; in the pressure reduction stage, the standard humidity is compared with the air speed and the conveying pressure under the material humidity at the current sampling moment and the humidity adjusting coefficient, the integral item is adjusted, and a target integral coefficient is obtained; and adjusting the conveying pressure based on the adjusted PID coefficient. The problem of asymmetry of bidirectional adjustment of pressurization and depressurization can be solved, the adjustment logic is optimized, and the conveying efficiency and stability of pneumatic conveying of powder and particle materials are improved.

The invention relates to the technical field of underwater vehicles, and discloses a built-in phase change drainage system and an underwater vehicle, the built-in phase change drainage system comprises a drainage device, a water ballast tank and a control unit, the drainage device comprises a first power unit and a pressure reduction unit, a first storage chamber for storing liquid carbon dioxide is arranged in the first power unit, and a pressure reduction chamber is arranged in the pressure reduction unit; the water ballast tank is provided with a containing cabin used for containing water, and the containing cabin is selectively communicated with the pressure reduction cavity. The control unit is in communication connection with the first power unit, the first power unit is suitable for converting liquid carbon dioxide into high-pressure supercritical carbon dioxide under the control of the control unit, and the carbon dioxide enters the containing cabin after being subjected to pressure reduction of the pressure reduction cavity so as to discharge water in the containing cabin. The drainage system is safe, efficient and high in drainage capacity.

A method for starting up vapor-recompression units comprises: providing a vapor recompression sub-system comprising one or more vapor-recompression units, wherein the vapor recompression sub-system has a vapor inlet and a compressed-vapor outlet; providing a means of reducing vapor density through pressure reduction in vapor communication with the vapor recompression sub-system; reducing pressure within the vapor recompression sub-system to reach a sub-system pressure selected from 0.1 kPa to 1000 kPa; introducing a vapor mass flow to the vapor recompression sub-system at a restricted vapor mass flow rate; starting up the vapor recompression sub-system while maintaining the restricted vapor mass flow rate for a start-up time period; and then, following the start-up time period, introducing additional vapor mass flow to the vapor recompression sub-system to reach a full vapor mass flow rate. The restricted vapor mass flow rate is from 0.1% to 90% of the full vapor mass flow rate.

The utility model provides a liquid carbon dioxide energy storage refrigerating system. The liquid carbon dioxide energy storage refrigerating system comprises an energy storage system, a refrigerating system and a heat circulation system. The energy storage system comprises a low-pressure liquid storage tank, a first throttling pressure reducing valve, a first heat exchanger, a compressor, a second heat exchanger and a high-pressure liquid storage tank which are sequentially connected in a sealed mode. The refrigerating system comprises a high-pressure liquid storage tank, a second throttling pressure reducing valve, a third heat exchanger, a fourth heat exchanger and a low-pressure liquid storage tank which are sequentially connected in a sealed mode. The heat circulation system comprises a cold storage tank, the cold storage tank is coupled with the first heat exchanger through a circulation pipeline, and the cold storage tank is coupled with the fourth heat exchanger through a circulation pipeline. In the low peak period of electricity utilization, the electric energy is stored in the form of high-pressure liquid carbon dioxide. And the liquid carbon dioxide is gasified and cooled through pressure reduction of the second throttling pressure reducing valve so as to provide cold energy. And meanwhile, cold energy generated in the refrigeration process can be stored through the heat circulation system and used for cooling carbon dioxide in the energy storage process.

The invention relates to the technical field of desulfurization towers, in particular to an ultrasonic agglomeration dedusting and demisting device of a desulfurization system and an operation method thereof, and aims to solve the problems that in the prior art, fine particles in flue gas are not subjected to agglomeration pretreatment, a targeted cleaning mechanism is lacked, and a demister is easily blocked due to filter residue attachment after long-term operation; and finally, the dedusting and demisting efficiency of the desulfurizing tower is reduced. According to the invention, the ultrasonic generation module is started, parameters are dynamically optimized based on a PLC and a fuzzy PID algorithm to induce agglomeration of PM2.5 and fog drops, the particle size is increased through a depressurization ring, and then efficient gas-liquid separation is carried out through a dual separation mechanism; when filter residues are attached, the motor drives the spray pipe to rotate and spray, the cleaning assembly is matched for wiping, the guide assembly guides waste liquid, the intelligent system adjusts in real time and triggers a cleaning program, a pretreatment and cleaning mechanism is established, blockage is eradicated, stable operation of parts is ensured, and the dust and mist removal efficiency is improved.

The invention discloses a microwave digestion tank with a rapid pressure reduction structure, and relates to the technical field of microwave digestion tanks. The microwave digestion tank with the rapid pressure reduction structure comprises a tank body and a tank cover, a mounting cavity is formed in the tank cover, a through hole is formed in the bottom of the mounting cavity, and an exhaust pipe is fixedly connected to the top of the through hole. According to the microwave digestion tank with the rapid pressure reduction structure, during rapid pressure reduction, when high-pressure gas in the sealing cavity is discharged through the through hole, gas-liquid separation, gas discharge and liquid return into the sealing cavity can be performed through the gas-liquid separation device, so that the liquid in the tank body is prevented from being taken out by gas flow, and the accuracy of a detection result is ensured.

The invention provides an air pressure regulation and control device, a cold air micro-propulsion system and a satellite, and relates to the technical field of cold air micro-propulsion. The air pressure regulation and control device comprises a high-pressure valve, a two-stage pressure reducing valve, a precise pressure regulating valve, a buffer gas cylinder and a pressure sensor; one end of the high-pressure valve is connected with the high-pressure gas cylinder, and the other end of the high-pressure valve is connected with the two-stage pressure reducing valve through a first pipeline; the precise pressure regulating valve is provided with a first connector, a second connector, a third connector and a fourth connector, the first connector is connected with the two-stage pressure reducing valve through a second pipeline, the second connector is connected with the pressure sensor through a third pipeline, the third connector is connected with the buffer gas cylinder through a fourth pipeline, and the fourth connector is connected with the thruster. Compared with the prior art, the air pressure regulation and control device has the advantages that the mode of combining two-stage pressure reduction, air capacity buffering and air pressure closed-loop precise regulation and control is adopted, stable and low-noise air can be supplied to the thruster, and therefore high-stability and low-noise thrust output is achieved.

The invention discloses a directional drilling grouting construction method, belongs to the technical field of civil engineering foundation treatment and underground engineering grouting, and mainly solves the technical problems that the grouting effect is not uniform and ground lifting is difficult to accurately regulate and control due to insufficient control precision of existing drilling deflection. The drilling axis is positioned through the three-dimensional coordinate of the total station, the guide drill bit with the built-in ultrasonic probe is adopted for segmented drilling, the skewness is detected in real time when drilling is conducted every 2 m, and the angle deviation is dynamically corrected through the hydraulic adjusting mechanism. The grouting operation adopts a staged pressure-boosting grouting process, and in the pulling-back process of a grouting pipe, grout filling compactness is ensured through intermittent grout supplementing and tail end pressure-reducing operation. A laser range finder is synchronously adopted to monitor the ground lifting amount in real time, and when the ground lifting amount reaches 3 mm, construction hole sites are automatically switched. The method is suitable for foundation reinforcement engineering of soft soil strata and adjacent sensitive buildings, the construction precision can be effectively controlled, the grouting quality is improved, and stratum disturbance is reduced.

The invention relates to the technical field of natural gas extraction, in particular to a natural gas positive and negative gas lift synergistic pressure reduction and yield increase process which comprises the steps that gas injection stages are divided based on the numerical range of the annulus liquid level height, and the positive gas lift proportion is adjusted, confirming the positive gas lift proportion of each moment in the first stage; in the second stage, on the basis of the dispersion degree of the annular pressure of the well bottom and the oil pipe pressure, discrete changes of the gas-liquid mixing density of all the sampling points at all the moments are combined, a differential coefficient is obtained, and the positive gas lift proportion at all the moments of the second stage is adjusted; in the third stage, the numerical distribution of the annular pressure and the oil pipe pressure at the well bottom is analyzed, and the positive gas lift proportion at each moment in the third stage is obtained; and if the positive gas lift proportion of any stage of gas injection is reduced to a preset value, adopting reverse gas lift to exploit natural gas subsequently. The invention aims to improve the gas production efficiency and stabilize the gas well pressure.

The invention relates to the technical field of casting devices, in particular to a casting device for a part lightweight suspension bracket, which comprises a support frame, a casting mold and a pouring box which are arranged on the support frame, a pouring pipe arranged on the pouring box, and a pressure reduction box and a medicine inlet pipe which are arranged on the pouring pipe; the pouring box is used for pre-storing molten metal, and the pressure reducing box is used for storing a pressure reducing agent; the pouring pipe is provided with a control assembly used for controlling the input amount of molten metal, a pressure reducing assembly used for reducing the pressure of the molten metal and a stirring piece used for stirring the molten metal. A pushing assembly used for pushing the pressure reducing agent is arranged on the inner side of the pressure reducing box. The purpose that the defoaming effect of the molten metal is good is achieved, the dispersing and mixing uniformity of a pressure reducing agent in the molten metal can be guaranteed, the adding amount of the pressure reducing agent can be guaranteed, the adding amount of the pressure reducing agent can be accurately controlled, and the defoaming effect of the molten metal and the performance of the molten metal are guaranteed.

The invention discloses a single-action pressure reduction diaphragm type pressure flow amplifier in the field of industrial flow control. The single-action pressure reduction diaphragm type pressure flow amplifier comprises a machine body, a valve core, a flexible diaphragm, an exhaust assembly, a large pressure reduction device and a small pressure reduction device. An adjusting cavity, an air inlet cavity, an air outlet cavity, an air inlet channel and an air outlet channel are formed in the machine body, the air inlet channel is communicated with the air inlet cavity, the air outlet cavity is communicated with the air outlet channel, the valve core is arranged between the air inlet cavity and the air outlet cavity, the valve core is pushed through the flexible diaphragm and the exhaust assembly, and the compressed air flow and pressure intensity between the air inlet cavity and the air outlet cavity can be adjusted; when the pressure intensity of the adjusted air is relatively low, the small pressure reducing device is used for reducing pressure; and when the pressure intensity is high, the large pressure reducing device is used for reducing pressure. The diaphragm structure design is adopted, the flow and the pressure intensity of compressed air are adjusted through reciprocating motion of the flexible diaphragm, the pressure intensity of the adjusted air is reduced through the two pressure reducing devices, and the diaphragm structure can be better suitable for application scenes where the pressure intensity of the adjusted air is high.

The invention relates to the technical field of high-pressure gas pressure reduction, and discloses a multi-stage pressure reduction device suitable for different pressure gradients, which comprises a main valve body, an upper valve cover is connected above the main valve body, and an outlet valve cover is connected below the main valve body; a plurality of mounting grooves are formed in the upper part of the main valve body side by side, and a group of main body pressure reducing and adjusting mechanisms are correspondingly mounted in each mounting groove; a flow dividing and guiding mechanism is further installed on the portion, between every two adjacent installation grooves, of the main valve body. A one-way air outlet mechanism is installed at the position, corresponding to each flow dividing and guiding mechanism, of the upper portion of the outlet valve deck, and air outlets of the one-way air outlet mechanisms are communicated with an air outlet of the outlet valve deck through air channels formed in the outlet valve deck. A plurality of corresponding main body pressure reducing and adjusting mechanisms, flow dividing and guiding mechanisms and one-way gas outlet mechanisms are designed in the device, gas flow channels can be selected in a self-adaptive mode according to different pressure gradients, and efficient pressure reducing and stabilizing under the multiple pressure gradients can be met at the same time.

The utility model provides an efficient depressurization device for an LNG storage tank, and relates to the technical field of LNG storage tanks, the efficient depressurization device for the LNG storage tank comprises a tank body, a supporting structure is arranged below the tank body, the tank body extends in the horizontal direction, pressure gauges are arranged at the two ends of the tank body respectively, a connecting pipe is fixedly arranged above the tank body, and the upper end of the connecting pipe is connected with a depressurization pipe; the upper end of the condensation pipe is connected with an input pipe, and the lower end of the condensation pipe is connected with an output pipe; a connecting pipe is arranged in the connecting pipe, a pressure reducing pipe is arranged in the connecting pipe, a through pipe is arranged below the pressure reducing pipe, the through pipe is inserted into the connecting pipe to connect the pressure reducing pipe and the connecting pipe, a control valve is arranged in the connecting pipe, and a sealing ring is arranged between the control valve and the through pipe. Pollution caused by interaction of gas and air in the storage tank is avoided, and by arranging a positioning column and a dismounting assembly, the depressurization pipe is convenient to dismount.

A forward and reverse bidirectional flow rate metering method for an underwater chemical agent injection device. The underwater chemical agent injection device comprises a device body, wherein the device body comprises an agent input joint (1), a pressure reduction member (2), a needle valve assembly (5) and an agent output joint (3), which are sequentially in communication by means of a flow channel. The method comprises: first, respectively performing forward calibration and reverse calibration by means of an agent at different opening degrees and different flow rates, during which a differential pressure is synchronously acquired before and after the agent flows through a needle valve assembly (5); then, fitting relationships between flow rates and differential pressures under different opening degrees of the needle valve assembly (5), so as to obtain several opening degree-flow coefficient arrays; and then fitting relationships between flow coefficients and the opening degrees, and establishing equations for the flow rate, opening degree and differential pressure.

The invention provides a high-pressure cavitation valve which comprises a valve body, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core and a valve core, and is characterized in that the valve body is internally provided with a mounting cavity and is provided with a flow inlet channel and a flow outlet channel; the valve cover is arranged at the upper part of the valve body and used for covering the upper side of the mounting cavity; the valve assembly comprises a valve element, a valve rod, a mounting seat, a valve seat and a throttling module, the mounting seat, the throttling module and the valve seat are sequentially arranged from top to bottom, a movable cavity of the valve element is formed in the mounting seat and the throttling module, the valve element is mounted in the movable cavity and used for acting up and down to be matched with the valve seat to open and close the valve, and the valve rod penetrates through the valve cover and then is connected with the valve element; the throttling module at least comprises two round throttling laminations which are arranged in an up-down overlapped mode, a center hole is formed in the center of each throttling lamination in a penetrating mode, a labyrinth flow channel used for reducing pressure and noise of media is formed between every two adjacent throttling laminations, and the labyrinth flow channels are not communicated with one another at the overlapped portions of the throttling laminations. The throttling module in the scheme can effectively play roles of throttling, pressure reduction and the like.

The invention relates to the technical field of underwater vehicles, and discloses a supercritical carbon dioxide phase change drainage device and an underwater vehicle, the supercritical carbon dioxide phase change drainage device comprises a first power unit, a pressure reduction unit and a first pressure relief unit; the first power unit is provided with a first storage chamber and a first outlet, the first storage chamber is communicated with the first outlet, and liquid carbon dioxide is stored in the first storage chamber; the pressure reducing unit is provided with a pressure reducing chamber, a first inlet and a second outlet, and the first inlet and the second outlet are both communicated with the pressure reducing chamber; and the first pressure relief unit is blocked between the first inlet and the first outlet, and the first pressure relief unit is opened when the pressure in the first storage chamber is larger than a preset value, so that the first inlet communicates with the first outlet. The drainage device is safe, efficient and high in drainage capacity.

The invention relates to the technical field of auxiliary power systems, in particular to a manufacturing method of an air supply device of an auxiliary power system. The method comprises the steps that a high-pressure air pressure distribution area under the working state of an auxiliary power system air supply device is obtained; determining a positioning surface and a sealing surface of the air supply device of the auxiliary power system according to the distribution area; the assembly tolerance of the auxiliary power system air supply device is determined according to the positioning face and the sealing face; an air inlet channel shell, an air inlet air pocket, an air inlet channel outer ring, an air inlet volute, a labyrinth ring, a locking unit and a rotor are machined according to the assembly tolerance; and an auxiliary power system air supply device is assembled, so that the air inlet channel shell, the air inlet air pocket, the air inlet channel outer ring and the air inlet volute sequentially abut against one another in the axial direction, the labyrinth ring is pressed between the outer side ring face of the outer sealing barrel and the inner side ring face of the volute positioning barrel, and a stepped pressure relief cavity is formed between every two adjacent pressure relief ring gears. Therefore, the problem that the air inlet end shell of the auxiliary power system is very difficult to position and seal well is solved.

The invention provides a silencer, an air suspension assembly and a vehicle, relates to the technical field of vehicles, and aims to reduce the size of the air suspension assembly. The silencer comprises a flow guide plate, a shell, an air suction end cover and a silencing piece. The guide plate has guide holes. The shell is provided with a containing space, the flow guide plate abuts against the inner wall of the containing space so that the containing space can be divided into a silencing cavity and a pressure reduction cavity, the silencing cavity communicates with the pressure reduction cavity through the flow guide hole, the silencing cavity is provided with an exhaust port, and the pressure reduction cavity is provided with an exhaust port used for being connected with an exhaust pipe. The air suction end cover extends from one side of the shell to the direction away from the shell to form an air suction cavity, the end, away from the shell, of the air suction cavity is provided with an air suction port and an air suction port, the air suction port communicates with the outside, and the air suction port is used for being connected with an air supply pipe. And the silencing piece is arranged in the silencing cavity. Therefore, the size of the air suspension assembly can be reduced, and the cost of the air suspension assembly can be reduced.

The expansion valve comprises a valve body assembly, a pressure reduction module and a noise reduction assembly, the valve body assembly is provided with a valve port, a first side and a second side, the valve port is located between the first side and the second side, and the valve port communicates with the first side and the second side; the pressure reduction module and the silencing assembly are both arranged on the second side, and the pressure reduction module is located between the valve port and the silencing assembly and provided with a flow channel communicating with the valve port and the silencing assembly. The expansion valve has a first working condition, and when the expansion valve is in the first working condition, a working medium flows to the valve port from the first side, is throttled through the valve port and then sequentially flows through the flow channel and the silencing assembly.

The invention discloses a pressure regulating and speed regulating system of a drilling machine derrick lifting hydraulic cylinder. The pressure regulating and speed regulating system comprises a hydraulic system, a derrick area, a regulating control box and a safety area display monitoring unit. The adjusting control box is connected with the hydraulic system, the derrick area and a diesel generating set of an original lifting system through lines, and the hydraulic system is connected with the diesel generating set and the derrick area through lines. The diesel generating set supplies power to the whole system, the derrick area measures the inclination angle of a derrick and the displacement of an oil cylinder and transmits the measurement result to the adjusting control box, the adjusting control box sends an instruction to the hydraulic system according to the measurement result to conduct system pressure reduction, and the safety area display monitoring unit is used for displaying various parameters of the system. And an operator can check conveniently. The invention further discloses a method for regulating the pressure and the speed of derrick lifting by using the system. The device solves the problems that an existing system does not have closed-loop control, misoperation is prone to occurring, out-of-tolerance cannot be adjusted by itself, and equipment failures are caused due to the fact that pressure reduction cannot be achieved.