1294 results about "Water jacket" patented technology

The invention discloses a self-correction optimization method and system for heat transfer boundary conditions of a water jacket heater, and particularly relates to the technical field of condition optimization control. The method comprises the following steps: constructing a thermal fatigue deformation trend estimation model by collecting a furnace wall surface temperature sequence, furnace wall surface heat flux distribution information and a furnace wall thermal stress response curve of a furnace body structure component, and generating a geometric parameter drift vector; performing structure equivalent mapping analysis on the geometric parameter drift vector, and extracting contact thermal resistance change information; performing furnace wall heat flow field reconstruction on the geometric parameter drift vector to obtain a dynamic correction vector; and the contact thermal resistance change information and the heat flow correction vector are comprehensively analyzed, a time-varying boundary condition inversion model is constructed, and a multi-parameter coupling boundary correction set is output and used for updating the boundary conditions in the water jacket heating furnace heat transfer simulation model, so that identification and self-adaptive correction of the boundary conditions are realized, and the heat transfer control precision and the heat efficiency are improved.

The invention discloses a continuous nickel smelting method and equipment, the equipment comprises a smelting furnace, an electric furnace and a converting furnace, the smelting furnace is provided with a feeding port and a reducing agent and vulcanizing agent feeding port, and one side of the electric furnace is directly communicated with the bottom of one side of the smelting furnace; one side of the converting furnace is directly communicated with the bottom of the other side of the smelting furnace, the heights of the furnace bottoms of the electric furnace, the smelting furnace and the converting furnace are sequentially reduced, the lower part of the smelting furnace is provided with a molten pool reaction area with a copper water jacket for cooling, the molten pool reaction area is provided with a group of primary tuyeres, and the group of primary tuyeres is provided with a group of secondary tuyeres. The upper part of the smelting furnace is provided with a group of secondary tuyeres; and the converting furnace is provided with a spray gun. According to the invention, the laterite-nickel ore smelting, settling separation and blowing functions are simultaneously realized by one furnace partition, a blowing furnace and a settling electric furnace do not need to be independently configured, and the maximum utilization of the sensible heat of the slag is realized.

The present invention relates to the technical field of water purification, and specifically to a pure water purification device and a pure water purification treatment method thereof, including a square pipe frame, a pre-filter unit, and a cut-off unit. The pre-filter unit is fixedly arranged at the left end inside the square pipe frame, and the cut-off unit is fixedly arranged at the upper end inside the pre-filter unit. Locking universal wheels are fixedly arranged at the four corners of the bottom of the square pipe frame. The output shaft of the reduction motor drives the central vertical shaft to rotate. The rotation of the central vertical shaft drives the rotation of four water squeezing rollers through the connection of the upper and lower cross angle plates, rolls the outer walls of the four rubber water squeezing sleeves, causes the rubber water squeezing sleeves to contract, and pressurizes the tap water in their internal areas, which can increase the flow rate of the tap water passing through the filter holes for primary filtration inside the water retaining station ring, and thus improve the primary filtration efficiency of pure water.

The present invention discloses a multi-stage blade disk multi-blade sleeve type electrolytic machining mechanism and method, belonging to the field of electrolytic machining. Connecting rods and cross bits are designed to convert the one-dimensional rotational motion of the main drive shaft into the feed motion of the multi-stage cathode, so as to realize the simultaneous electrolytic machining of multi-stage blades, improve the efficiency of electrolytic machining, and shorten the machining cycle of the overall component. Limiting rings and limiting blocks are designed to realize the centripetal feed motion of the cathode part of each level of tool. According to the characteristics of the blades, by adjusting the inner contour of the cathode, the inner contour of the insulating water jacket, the installation position of the mounting rod on the disc, the position and radial length of the radial limiting groove and other parameters, the simultaneous electrolytic machining of two-stage blades with different characteristics is realized.

The invention discloses a thermal management control system for a small-displacement engine, belongs to the technical field of thermal management of engines, and solves the technical problem of overheating during operation of the existing small-displacement engine. The system comprises a cylinder body, a cylinder cover, a temperature control module, an air cooling radiator, a water pump, a preheater, an expansion water tank, an exhaust pipe water jacket, a control module, a radiator, a thermostat, an oil tank, a first control valve, a second control valve and a third control valve, a water heat exchanger is arranged in the oil tank, the cylinder body is provided with a first temperature sensor, and the cylinder cover is provided with a second temperature sensor. The thermostat is provided with a third temperature sensor, the oil tank is provided with a fourth temperature sensor, and the control module is electrically connected with the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor. The oil supply temperature management mode and the engine body temperature management mode are determined through the cylinder body temperature, the cylinder cover temperature, the cooling water temperature and the fuel oil temperature, so that the engine body of the small-displacement engine is prevented from being overheated, and the performance of the small-displacement engine is improved.

The utility model provides a cooling system of a coal mining conveying device for an underground coal mine. The cooling system comprises a water pump, an inlet end of which is connected to a motor and a speed reducer water jacket in the coal mine conveying device through a pipeline; one end of the air-water radiator is connected to the outlet end of the water pump through a pipeline; each electric three-way valve comprises a port A, a port B and a port C, the two electric three-way valves are arranged in the system, and the ports A of the two electric three-way valves are connected with each other; ports B of the two electric three-way valves are connected through the heat exchanger. The heat dissipation system of the coal mining conveying device for the underground coal mine solves the problems that existing equipment seriously depends on an external low-temperature water source, has certain potential safety hazards and cannot be used in an occasion with the high water source temperature, and has the advantages that the external water source does not need to be additionally connected, and water cannot be drained to the outside; and environmental damage and pollution to the working face can be reduced.

The present invention relates to the field of data processing technology, and specifically to a temperature monitoring system and a temperature monitoring method for a water jacket heating furnace. The method comprises: obtaining historical temperature data and real-time temperature data of the water jacket heating furnace, randomly generating multiple binary trees using the historical temperature data, and evaluating the structural stability of each binary tree and the reliability of the root node selection. The Gini index is calculated by the temperature data of the binary tree and the inverse is taken to obtain the node purity of the binary tree. The product of the node purity and the reliability of the root node selection is used as the segmentation ability value, and then the weight of each binary tree is determined. The real-time temperature data is inserted into the binary tree, the change in the complexity of the binary tree is obtained, and the weighted sum is used to obtain the degree of abnormality, so as to judge whether the real-time temperature data is abnormal, so as to achieve the purpose of monitoring the temperature. This method comprehensively evaluates the performance of the binary tree based on multiple factors, improves the accuracy of temperature anomaly detection, and improves the accuracy and reliability of temperature monitoring of the water jacket heating furnace.

The invention discloses a heating furnace energy efficiency optimization method and system, and particularly relates to the technical field of operation control. The method comprises the following steps: acquiring boiling state parameters and structural deformation parameters of a water jacket heater in an operation process, identifying a critical point position of conversion from nuclear boiling to membrane boiling and membrane boiling duration, and calculating a thermal expansion displacement rate and an oscillation phase angle of a furnace shell; a heat transfer coefficient fluctuation compensation factor is generated by analyzing the phase lag relation between boiling phase change circulation and thermal expansion deformation; calculating a heat flow distribution adjustment amount according to the heat transfer coefficient fluctuation compensation factor; calculating a dynamic compensation correction coefficient by combining the flow velocity variable quantity of the cooling water and the flow-thermal expansion transfer function; based on the heat flow distribution adjustment amount and the dynamic compensation correction coefficient, the power output and the cooling water flow of the water jacket heating furnace are regulated and controlled, dynamic optimization adjustment of the heat transfer behavior of the heating furnace is achieved, and the energy efficiency stability and the heat transfer control precision of the water jacket heating furnace under complex working conditions are effectively improved.

The invention discloses an anti-icing method for an engine air inlet system, the engine air inlet system and a vehicle, and belongs to the technical field of engines. According to the anti-icing method for the engine air inlet system, the engine air inlet system and the vehicle, when the engine is in low-temperature cold start, the water vapor content in the engine air inlet system is reduced by reducing the torque of the engine; and / or the speed of the vehicle is reduced, so that the situation that the temperature of cooling liquid in a water jacket of the engine rises too slowly due to the fact that the vehicle purges the engine windward is avoided; when the temperature of the cooling liquid in the water jacket of the engine is low, adverse factors causing icing of an air inlet system of the engine are weakened, and the icing risk is reduced; when the temperature of the engine is too low, the temperature of the cooling liquid in the water jacket of the engine is high, the EGR mixer and the air inlet mixer are heated through waste heat of the engine, the problem that water separated out of high-temperature waste gas is frozen is solved, the purpose of preventing freezing can be achieved, cost is low, and system robustness is high.

The brake system comprises a transmission shaft, a brake gland, a brake pad, a brake piston, a rotary table bearing and a water jacket, the transmission shaft is installed in the water jacket through the rotary table bearing, a brake surface is arranged in the radial direction of the transmission shaft, the brake pad is installed on one side of the brake surface, and the brake piston is installed on the other side of the brake surface. The water jacket is provided with a pressure cavity connected with external oil corresponding to the brake surface, the brake piston is arranged in the pressure cavity, the brake gland is installed on the end face of the water jacket and makes contact with the brake pad and the brake piston, and the brake gland is pushed by the brake piston to be separated from the brake pad. The system can rapidly and reliably stop the rotary table in high-speed and high-precision application, and meanwhile abrasion and energy consumption are reduced. The development of the brake system is expected to improve the performance of the direct-drive five-axis cradle turntable, so that a safer and more reliable solution is provided in a plurality of engineering fields.

The invention discloses an integrated pulverized coal burner. A burner head comprises a cooling water jacket, a cooling water partition plate, a fuel gas nozzle, an ignition oxygen nozzle and a pulverized coal nozzle. The burner body comprises a cooling water outer pipe, a cooling water partition pipe, a cooling water inner pipe, a pulverized coal sleeve, an ignition oxygen sleeve, a fuel gas sleeve, an ignition gun mounting pipe and a flame detection pipe; a fuel gas channel is formed between the ignition gun mounting pipe and the fuel gas sleeve, an ignition oxygen channel is formed between the fuel gas sleeve and the ignition oxygen sleeve, a pulverized coal channel is formed between the ignition oxygen sleeve and the pulverized coal sleeve, and a process oxygen channel is formed between the pulverized coal sleeve and the cooling water inner pipe. A cooling water outlet cavity is formed between the cooling water outer pipe and the cooling water partition pipe, and a cooling water inlet cavity is formed between the cooling water inner pipe and the cooling water partition pipe. Various key functions such as flame detection, an ignition gun, start-up fuel gas, start-up oxygen, process pulverized coal and process oxygen are integrated into single equipment, and the device has the advantages that the cost is saved, and the efficiency is improved.

The utility model relates to a three-stage vacuum pump set using a water-cooling variable-frequency integrated motor. The dry type vacuum pump comprises a roots vacuum pump, a roots pump support frame, a rack and an air inlet flange, and is characterized by further comprising a two-stage dry type vacuum pump, an upper pump and lower pump connecting flange, an electric control system, an exhaust silencer, a communication line connector and a power line connector, and the two-stage dry type vacuum pump is composed of a high-pressure-difference roots vacuum pump and a dry type screw vacuum pump; the two-stage dry vacuum pump is installed on the rack and located under the roots vacuum pump; an air outlet of the roots vacuum pump is connected with an air inlet of the two-stage dry vacuum pump through the upper and lower pump connecting flange, and the exhaust silencer is connected with an air outlet of the two-stage dry vacuum pump; and a shell of the high-pressure-difference roots vacuum pump and a shell of the dry-type screw vacuum pump in the two-stage dry-type vacuum pump are provided with cooling water jackets. The Roots vacuum pump is reasonable in structural design, small in size and capable of dealing with the large-load working condition, and the overall failure rate of the Roots vacuum pump is reduced.

The invention discloses an air suspension turbine power generation and refrigeration integrated device which comprises a shell, a stator and a rotor spindle, the rotor spindle is rotationally arranged in the shell through a bearing assembly, the stator is fixed in the shell and is coaxial with the rotor spindle, and an air gap exists between the stator and the rotor spindle to form a permanent magnet synchronous generator. The rotor further comprises a first-stage volute, a second-stage volute, a first-stage radial flow turbine, a second-stage radial flow turbine, a volute connecting pipe and a cooling water jacket, the first-stage volute and the second-stage volute are fixed to the two ends of the shell respectively, and the first-stage radial flow turbine and the second-stage radial flow turbine are coaxially fixed to the two ends of the rotor spindle respectively and are arranged back to back; the first-stage radial flow turbine is located in the first-stage volute, the second-stage radial flow turbine is located in the second-stage volute, the first-stage volute is provided with a high-temperature and high-pressure air inlet and a first-stage air outlet, and the second-stage volute is provided with a second-stage air inlet and an expansion cooling air exhaust port; the device has the advantages of being capable of stably running at a high speed in a high-altitude low-pressure environment and simultaneously achieving efficient power generation and refrigeration functions.

The invention discloses a fermentation system based on green seedling rotten vegetable, which is characterized by comprising a crushing system, a fermentation system and a solar energy supply system, the crushing system adopts a crusher integrating spiral feeding extrusion, reamer crushing and sieve pore filtration; the solar energy supply system comprises a solar heat collection device, a high-level oil tank, an energy storage facility, an energy storage medium, a heat exchanger, a water storage tank and a circulating pump which are integrated into a whole; the fermentation system comprises a plurality of vertical tank bodies, hot water jackets and heat preservation layers are arranged outside the vertical tank bodies, and the hot water jackets are circularly communicated with the solar energy supply system through heating pipelines and water outlet pipelines. The heat storage system is low in cost, but has high-capacity heat storage performance, total nutrient recovery of the waste vegetable seedlings is achieved, waste is converted into a total organic fermentation fertilizer, and soil nutrients are accurately supplemented.

The utility model discloses a cylinder block of a two-cylinder engine, comprising a cylinder body of a gantry-type structure, wherein the cylinder body is provided with two cylinder holes, wherein the axis of the cylinder holes and the axis of the crankshaft hole are not in the same plane, wherein a closed water jacket assembly is provided on the top of the cylinder body, wherein a plurality of water jackets in the closed water jacket assembly are arranged along the outer peripheral wall of the cylinder hole, wherein an inter-cylinder water hole connected with the water jacket is provided between the two cylinder holes, wherein the inter-cylinder water hole forms a V-shaped distribution with adjacent water jackets; wherein the cylinder body is provided with a balancing shaft mounting hole for mounting the balancing shaft; wherein the cylinder body is provided with a main oil circuit, a main oil supply oil circuit, and an auxiliary oil supply oil circuit, wherein the gantry-type cylinder body is adopted, and wherein the closed water jacket assembly and the balancing shaft mounting hole are provided on the top of the cylinder body, thereby greatly improving the structural strength of the top surface of the cylinder body, reducing the deformation of the cylinder hole, and significantly improving the NVH performance of the engine after assembling the balancing shaft.

The invention relates to the technical field of pressure vessel testing, in particular to a pressure vessel pressure testing device which comprises a gas tank, a turnover mechanism, a swing shaft and a clamping frame. The positioning mechanism comprises a positioning plug, the water injection mechanism comprises a water spray nozzle and a water jacket box, the gas tank is driven by the swing shaft to turn over at multiple angles to enter different procedures, the integrated setting of the fixing, water injection, detection and drainage processes is achieved, the gas tank is lifted, the detection result is judged, and the clamping frame automatically clamps, fixes and disassembles; the gas tank mounting and dismounting speed is further improved, compatibility with gas tanks of different specifications can be achieved, the application scene is widened, driving teeth and a swing shaft are comprehensively controlled to rotate through a control unit, preliminary judgment is carried out through a visual collection unit, drainage is carried out when unqualified products possibly exploded are encountered, then manual re-checking is carried out, and under-pressure detection is avoided; the detection safety and the detection efficiency are improved, the process steps are optimized, the detection efficiency is improved, and the detection safety is improved.

A slag barrier plate for a side-blown melting furnace with a melting bath, characterized in that it comprises: a slag barrier unit (1) with a plate body (11) for holding back molten slag; a heat dissipation unit (2) comprising: a cooling water jacket (21) extending through the interior of the plate body (11) to continuously introduce cooling medium into the plate body (11) to lower its temperature; a distributor arrangement (22) arranged at the end of the cooling water jacket (21) to introduce the cooling medium into the cooling water jacket (21).

The invention discloses an optical visualization test device suitable for transverse jet mixing characteristic research under different conditions. The optical visualization test device mainly comprises an air inlet diffusion section, a main body mixing section and an exhaust structure section. The main body mixing section is of a double-layer structure with an inner-layer main temperature bearing function and an outer-layer main pressure bearing function, an independent cooling cavity is formed between the flame tube and the cartridge receiver, replaceable flat straight flow channel or contraction flow channel installation bases are arranged on the upper wall face and the lower wall face of the flame tube, and multiple functional modules such as main combustion holes and cooling gas film flow channels are integrated. Each wall surface is provided with an optical glass window, and multi-path laser incidence and image acquisition are supported. Blended gas enters the blending holes through the gas collection tank and the flow uniformizing plate, transverse jet flow and main flow blending is formed, and the device is suitable for visual measurement under different rotational flow intensities, cooling conditions and wall surface structures. And the exhaust section is provided with a spraying and water jacket cooling system, so that the exhaust temperature can be effectively controlled. The device is flexible in structure, adjustable in parameter and suitable for combustion chamber jet mixing mechanism research and optical measurement verification.

The invention provides a plasma beam heating-based cold crucible suspension smelting device and smelting method. The plasma beam heating-based cold crucible suspension smelting device comprises a plasma beam emitter and a cold crucible main body, the cold crucible main body is of a split type water cooling structure, a cold crucible water path is arranged in the cold crucible main body, a cooling water jacket is arranged on the outer side of the bottom of the cold crucible main body, the cold crucible water path is communicated with the cooling water jacket, a detachable crucible plug is further arranged at the bottom of the cold crucible main body, and the shape of the crucible plug is matched with that of an opening in the bottom of the cold crucible main body; an induction coil is arranged around the outer side of the cold crucible main body; a first electric shaft driving device is mounted on the plasma beam emitter, and a second electric shaft driving device is mounted on the cold crucible main body. The plasma beam emitter emits plasma beams to directly heat metal materials in the cold crucible, the superheat degree of a molten pool of the cold crucible can be effectively increased, metal materials with higher melting points can be molten after the superheat degree is increased, crystal structures in the metal can be refined, the mechanical properties of the alloy can be improved, and the purity of the alloy can be improved.

The invention provides a shallow water jacket split vertical non-slideway construction design method. The method comprises the following steps: generating shallow water jacket split vertical non-slideway construction scheme data; designing a segmented final assembly cushion pier of the upper jacket and an integral shipment transportation cushion pier of the jacket, and outputting cushion pier design data; designing a foundation transformation scheme of the shallow water jacket split vertical non-slideway construction area, and generating foundation transformation scheme data; designing the construction scheme of the lower jacket, the scheme of constructing the upper jacket based on the lower jacket and the hoisting and closing scheme of the upper jacket and the lower jacket, and generating lower jacket construction scheme data, upper jacket construction scheme data and hoisting and closing scheme data. The jacket is divided into the upper jacket and the lower jacket, vertical construction is completed at the same time in a non-slideway area, then folding and final assembly are conducted, the construction period is short, the ship loading speed is high, a slideway is not needed, and occupied space is small; vertical installation can be directly carried out on the sea, and offshore righting operation is not needed.

The utility model relates to a triple-cycle high-salinity wastewater low-temperature scraper drying system which comprises a roller scraper dryer, a steam condensation chamber, a condensed water tank and a vacuum pump, the vacuum pump vacuumizes the drying cavity through the condensate water tank and the steam condensation chamber. The first heat exchange cycle is suitable for exchanging heat absorbed by the steam condensation chamber to the third heat exchange cycle; the second heat exchange cycle is suitable for exchanging heat of the third heat exchange cycle to the water jacket; and the heat exchange ends on the two sides of the third heat exchange cycle are connected with the first heat exchange cycle and the second heat exchange cycle correspondingly. The three heat exchange cycles work cooperatively, the heat of the first heat exchange cycle is reduced, the heat provided for the second heat exchange cycle by the third heat exchange cycle is reduced, and the hot water in the second heat exchange cycle can still heat the materials in the drying cavity by exceeding the boiling point rise through the auxiliary heat, so that the low water content of the dry materials is effectively ensured.

The utility model relates to a motor cooling system and a motor, the motor comprises a casing, a rotating shaft and an end cover, the end cover is arranged at one end of the casing, the middle of the end cover is provided with a shaft hole for the rotating shaft to pass through, and the end cover is provided with a bearing seat for mounting a bearing at the shaft hole; the motor cooling system comprises a first water gap and a second water gap which are arranged on the casing and / or the end cover, and a water jacket arranged in the casing; a first flow channel communicated with the first water opening is defined between the water jacket and the machine shell. A second flow channel is defined between the end wall of the water jacket and the inner side of the end cover, the bearing seat is located in the second flow channel, and the first end of the second flow channel is communicated with the second end of the first flow channel; a third flow channel is communicated between the second end of the second flow channel and the second water opening, and at least part of the third flow channel is located in the rotating shaft. According to the scheme, the stator cooling water path and the rotor cooling water path are connected into a circulating flow path, so that the stator, the rotor and the bearing of the motor can be cooled, the comprehensive cooling effect of the motor is better, and the cooling efficiency is higher.

A spinning tool, including an upper connecting plate for connecting with the upper connecting seat of the spinning machine, a lower connecting plate for connecting with the lower connecting seat of the spinning machine, and a spinning wheel; the upper connecting plate is connected to the upper core mold; the lower core mold is connected to the lower connecting plate; the ejector is installed at the outer molding surface of the lower core mold; the ejector plate 1 and the ejector plate 2 are arranged in a cross shape, connected at the middle intersection, and connected to the connecting block at the lower end; both ends of the ejector plate 1 and the ejector plate 2 are connected with ejector rods; a clearance hole is provided in the middle of the lower connecting plate so that the ejector plate 1 and the ejector plate 2 can be raised and lowered in the clearance hole along with the ejection mechanism of the spinning machine; the lower core mold is provided with a through hole for the upper end of the ejector rod to pass through so as to push the ejector to feed upward when withdrawing the material. The upper and lower core mold working surfaces are provided with an inclination to facilitate the picking and placing of processed products; the ejector facilitates the rapid switching of different products; the utility model is arranged on the spinning machine for forming a water jacket casing blank, and no waste is produced during the forming process, thereby improving the material utilization rate.

The utility model discloses an air hole water jacket capable of rotatably adjusting a blowing angle for a side blowing furnace, which is provided with an air hole water jacket body, and the air hole water jacket body comprises a cone frustum arranged in a conical hole of a side blowing furnace body; the outer end of the cone frustum is provided with the spray gun connecting part integrally formed with the cone frustum, and the spray gun connecting part is used for being connected with a spray gun connecting structure; an included angle is formed between the axis of the inclined through hole and the axis of the cone frustum, and the inclined through hole penetrates through the cone frustum and the spray gun connecting part; the inclined through hole and the axis of the cone frustum form the included angle, so that the angle of the inclined through hole in the cone frustum can be adjusted when the cone frustum is rotated, the structure is simple and reasonable, the structure is simple, the operation is convenient, the cost is low, the production efficiency is high, and the production cost is low. Inclined through hole blowing airflow impact coverage area is increased, an airflow stirring dead zone is improved, the blowing effect is enhanced, and the smelting efficiency is improved.

The utility model relates to the technical field of motor parts, in particular to a cooling water jacket, a motor and a vehicle. The cooling water jacket comprises a shell, a water inlet and a water outlet; the shell sleeves the outer side of the motor; a cooling channel is arranged in the shell and comprises a plurality of first channels and a plurality of second channels, the first channels are arranged in the axial direction of the shell, the first channels are sequentially communicated to form an axial channel, the second channels are arranged in the circumferential direction of the shell, and the second channels are sequentially communicated to form a circumferential channel. The axial channel is communicated with the circumferential channel; the water inlet and the water outlet are formed in the shell, the water inlet is communicated with the axial channel, and the water outlet is communicated with the circumferential channel. According to the cooling water jacket, the water inlet and the water outlet can be arranged at any two different positions of the shell, so that the arrangement modes of the water inlet and the water outlet in the cooling water jacket are diversified, and the application range of the cooling water jacket is enlarged.

The application relates to a three-stage vacuum pump set using a water-cooled variable-frequency integrated motor and a control method. The application comprises a Roots vacuum pump, a Roots pump support frame, a rack and an air inlet flange, and is characterized in that the application further comprises a two-stage dry vacuum pump, an upper-lower pump connecting flange, an electric control system, an exhaust silencer, a communication line joint and a power line joint; the two-stage dry vacuum pump is composed of a high-pressure-difference Roots vacuum pump and a dry screw vacuum pump, the two-stage dry vacuum pump is installed on the rack, and the two-stage dry vacuum pump is located directly below the Roots vacuum pump; the Roots vacuum pump air outlet is connected with the two-stage dry vacuum pump air inlet through the upper-lower pump connecting flange; the exhaust silencer is connected with the two-stage dry vacuum pump air outlet; the high-pressure-difference Roots vacuum pump shell and the dry screw vacuum pump shell are both provided with cooling water jackets. The application has reasonable structure design, small volume, can cope with large load working conditions and reduce the overall failure rate of the Roots vacuum pump.

The invention discloses a water jacket insert for die casting of an integrated conformal cooling runner, relates to the technical field of metal casting, and aims to solve the technical problem that an existing water jacket insert cannot achieve differential cooling. The water jacket insert comprises an insert body, the conformal cooling runner is formed in the insert body, and a plurality of flow control mechanisms are arranged in the runner; and each group comprises at least two flow control assemblies. The flow control assembly is movably arranged on the limiting assembly and provided with magnetic matching blocks, and the magnetic pole orientations of the magnetic matching blocks in the same set are different. A driving mechanism is arranged on the mold and is used for driving the magnetic control mechanism to generate a direction-controllable external magnetic field. And the external magnetic field acts on the magnetic matching block to drive the flow control assemblies in the same group to generate opposite deflection motion, so that the flowing state of fluid in the flow channel is changed, the insert has at least two different cooling working modes, and active switching between strong cooling and rapid cooling is achieved. The problem that a traditional conformal cooling flow channel cannot be dynamically adjusted is solved, and the flexibility, uniformity and reliability of die-casting cooling are remarkably improved.

An electric propulsion device includes a propeller, a motor rotating the propeller, an inverter controlling driving of the motor, and a cooling device cooling the motor and the inverter. The cooling device includes an intake port taking water around the electric propulsion device into the electric propulsion device as cooling water, a drain port discharging the cooling water taken into the electric propulsion device to around the electric propulsion device, a pump flowing the cooling water from the intake port to the drain port in the electric propulsion device, a motor water jacket cooling the motor with cooling water taken into the electric propulsion device, and an inverter water jacket cooling the inverter with cooling water taken into the electric propulsion device. The motor water jacket and the inverter water jacket are connected in series between the intake port and the drain port in the electric propulsion device.

The invention provides a sliding vane type air compressor, which belongs to the technical field of air compressors and comprises a driving motor, a compressor body and a controller which are respectively connected to two ends of the driving motor, and a cooler connected to the compressor body, the driving motor is provided with a water jacket for introducing a refrigerant, the controller is provided with a flow channel communicated with the water jacket, an oil storage cavity and an exhaust cavity positioned above the oil storage cavity are formed in the compressor body, and the water jacket and the oil storage cavity are respectively communicated with the cooler so that the refrigerant flowing through the cooler exchanges heat with lubricating oil; a temperature control valve is arranged between the cooler and the oil storage cavity and is used for regulating and controlling the speed of the lubricating oil flowing through the cooler according to the oil temperature; a temperature sensor extending into the exhaust cavity is arranged on the compressor body, the temperature sensor and the driving motor are electrically connected with a controller, and the controller regulates and controls the rotating speed of the driving motor according to the exhaust temperature fed back by the temperature sensor. According to the sliding vane type air compressor, the oil content of exhausted air can be reduced.

The utility model discloses a laser range finder cooling device, which is characterized in that a protective shell is arranged, a circulating water jacket is arranged outside a laser range finder, a circulating water pump is used for driving, nitrogen is used for cooling the inside, the laser range finder is matched with the circulating water jacket for use, a sensor feeds back a temperature signal to a PLC (Programmable Logic Controller), and when the temperature exceeds 40 DEG C, a 1 # valve is opened; when the temperature exceeds 50 DEG C, the valve 2 is opened, and when the temperature is lower than 40 DEG C, the valve 1 and the valve 2 are both closed, meanwhile, the circulating water jacket continuously cools, when nitrogen blows over the surface of an object, heat on the surface of the object can be absorbed, heat conduction and heat dissipation are achieved through a convective heat transfer mechanism, meanwhile, heat exchange with the surrounding environment is achieved, and therefore the temperature of the surface of the object is reduced; the design ensures that the cooling device can rapidly dissipate heat and protect the performance and the service life of the laser range finder in a high-temperature environment, meanwhile, the air outlet faces the dust cover, dust outside the dust cover can be cleaned, and the laser range finder is prevented from being damaged. And the internal and external neatness of the dust cover can be ensured by circulating blowing, so that the precision and accuracy of the laser range finder are ensured.