8414 results about "Compressed air" patented technology

The invention relates to the technical field of aircrafts, in particular to a built-in compressed air and carbon dioxide linkage drainage system and an aircraft. The drainage system comprises a drainage device, a water ballast tank, a first connecting pipeline and a control unit, a first storage cavity for storing liquid carbon dioxide is formed in the first power unit, a second storage cavity for storing high-pressure air is formed in the second power unit, and a pressure reduction cavity is formed in the pressure reduction unit; the first storage chamber and the second storage chamber are both selectively communicated with the pressure reduction chamber; the water ballast tank is provided with a third storage chamber selectively communicated with the pressure reduction chamber; the first connecting pipeline is connected with the second power unit and the pressure reduction unit, and a first on-off valve is arranged on the first connecting pipeline; 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 high-pressure supercritical carbon dioxide enters the third storage chamber after being decompressed by the decompression chamber, so that the first connecting pipeline selectively communicates with the second storage chamber and the decompression chamber.

The invention discloses a low-temperature minimal quantity lubrication cooling method in aluminum alloy precision machining, and relates to the field of aluminum alloy precision machining. Machining parameters such as the cutting speed and the feeding amount are determined according to the aluminum alloy material, the machining requirement and the tool performance, and finite element simulation optimization is carried out; high-purity vegetable oil-based lubricating oil is selected, a nano anti-wear agent and an antioxidant are added, and cooling liquid is prepared by mixing compressed air through vortex tube refrigeration; spraying to a processing area through a special multi-channel nozzle, and dynamically adjusting the flow; multiple sensors are used for monitoring the temperature, the tool abrasion and the surface quality, and adjustment is conducted when threshold values are exceeded; and the cooling liquid is recycled after being subjected to centrifugation and membrane filtration treatment, and the metal filing is classified, recycled and reused. The cooling and lubricating effects are good, cutting heat and tool abrasion are reduced, the machining precision is improved, and the tool service life is prolonged; environment-friendly lubricating oil is recycled, so that pollution and cost are reduced; real-time monitoring and adjustment guarantee stable machining quality, machining efficiency is improved, and high-end manufacturing requirements are met.

The invention discloses a Coanda effect-based sand-proof and dust-proof device for an electrolytic bath, which is characterized in that a surrounding dust cover structure which is in flexible contact with the electrolytic bath or keeps a non-contact gap with the electrolytic bath is formed at the periphery of a full-load-bearing movable bracket, and the dust cover structure forms a semi-closed protection structure between a foundation and the electrolytic bath; dustproof cover structures composed of fences are arranged on the two sides of a foundation with profile steel as the foundation, each dustproof cover structure at least comprises a vertical fence wall arranged on the side portion of the full-bearing type movable bracket, the bottom of each vertical fence wall is connected with the foundation, and the top of each vertical fence wall makes flexible contact with the electrolytic cell or forms a non-contact gap with the electrolytic cell. A continuous variable-curvature Coanda curved surface is adopted, the airflow speed is increased through the wall attachment effect, a laminar flow air curtain is formed, and curvature-flow velocity coupling optimization is formed. Compressed air is injected through the narrow slit nozzle, ambient air is pried to form a large-flow air curtain, the actually measured air curtain coverage area is 3.2 times that of a traditional flow guide plate, and the unit energy consumption is reduced by 57%.

The present disclosure describes implementations that relate to a pressure testing and refilling a coolant system. In a first embodiment, the present disclosure describes a pressure tester and refilling device that has a valve system and adapters configured to pressurize and pull a vacuum on the system without disconnecting any of the connections. The device includes a plurality of passages that couple to a vehicle coolant inlet, a pressurized air source, an external coolant source, and an exit. Within these passages, the device has several valves that can be controlled.

Systems and methods are provided for a portable air compressor comprising an electric battery, an electric motor, a piston, and an air hose. The electric motor is powered by the electric battery. The piston is coupled to and driven by the electric motor. The piston is configured to compress air within a piston cylinder. The air hose has a first end attachable to an air outlet of the piston cylinder and a second end attachable to an inflatable object. The portable air pump is configured to inflate the inflatable object to a target air pressure. When the target air pressure is below a predetermined pressure threshold, the portable air pump inflates the inflatable object at a first inflation rate. When the target air pressure is above the predetermined pressure threshold, the portable air pump inflates the inflatable object at a second inflation rate greater than the first inflation rate.

The invention discloses a split type vehicle-mounted intelligent oxygen supply system based on the VPSA technology and a control method, and the system comprises an air compressor which is arranged at the inner side of a wheel cover protection plate of a rear wheel of a vehicle and is used for compressing air and discharging the compressed air to a molecular sieve assembly; the molecular sieve assembly is arranged below a spare tire in a trunk of the vehicle and is used for separating nitrogen from oxygen in the air to generate oxygen; the oxygen conveying pipe is arranged on the inner side of the vehicle roof and connected with an oxygen outlet of the molecular sieve assembly, and an oxygen outlet is formed in the position, located above each seat, of the oxygen conveying pipe; the detection module comprises an altitude sensor and an oxygen concentration sensor, the altitude sensor is installed on the molecular sieve assembly, and the oxygen concentration sensor is arranged on a ceiling in a vehicle compartment; distributed arrangement is adopted, all parts of the oxygen supply system are installed at different positions of the vehicle, the space occupied by the oxygen generation system can be reduced, and meanwhile directional oxygen supply to specific seats is achieved through the distributed oxygen outlets.

The invention discloses a gas pipeline leakage acoustic detection device and method based on CPO-VMD and multi-feature extraction, and relates to the technical field of gas pipeline leakage detection, and the device comprises a compressed air storage tank, a pressure control valve, a barometer, a pipeline, a seamless steel pipe, a broadband microphone, a data acquisition card and a data storage device. The method using the device comprises the following steps: collecting a sound wave signal of gas pipeline leakage; carrying out adaptive decomposition on the original signal in combination with a CPO algorithm and variational mode decomposition; performing reconstruction and noise reduction on the key modal component through the correlation coefficient; and multi-dimensional features of the reconstructed signals are extracted, the signal features are screened and preferentially selected, and gas pipeline leakage detection and classification are performed through a classification detector. Therefore, by adopting the method, the decomposition effect and the classification precision of the leakage sound wave signals can be effectively improved, and the strong adaptability of a method framework in different scenes is enhanced.

The invention relates to the technical field of air leakage big data analysis, in particular to a compressed air pipeline air leakage intelligent analysis system and method based on LLM. A plurality of monitoring nodes in a compressed air pipeline are analyzed, and data normal range parameters and adaptive acquisition frequency are preset for each node in the pipeline operation stage; the clear definition standard avoids misjudgment of original data due to fuzzy threshold values, then data noise is effectively reduced by analyzing the data synchronization degree of each monitoring node and intelligently repairing the problems of missing, deviation and the like, the repaired data better fits the actual operation state of the compressed air pipeline, the missed detection and mispositioning risks are reduced, and the reliability of the compressed air pipeline is improved. And finally fusing the data of the gas leakage node and the adjacent node to supplement multi-dimensional information, and optimizing the fusion data quality. The LLM model depends on high-quality fusion data, deep analysis is carried out in combination with compressed air pipeline multi-monitoring-node correlation characteristics and historical experience, deviation caused by data defects is reduced, and the accuracy of an intelligent air leakage analysis result is greatly improved.

The invention belongs to the technical field of energy storage, and relates to a compressed air and water coupled multi-energy co-production energy storage system and method, comprising an air compressor, a first heat exchanger, a second heat exchanger, an air turbine and a cooling module; a circulating medium of the first circulating loop is fused salt; the circulating medium of the second circulating loop is water, and the second circulating loop comprises a low-temperature water tank, a first booster pump, a second heat exchanger, a high-temperature water tank, a flash tank, a third heat exchanger, a steam turbine high-pressure cylinder and a heating module which are sequentially communicated end to end. Compression heat generated by compressed air can be stored in fused salt and water, special geographical conditions needed for storing high-pressure air are avoided, meanwhile, in the energy release stage, the stored water is used for flash evaporation and fused salt heating and then enters a steam Rankine cycle to do work, combined heat and power generation can be achieved in winter, combined cooling and power generation can be achieved in summer, and the energy-saving effect is achieved. Therefore, combined supply of different kinds of energy in different seasons is achieved, and the energy supply efficiency is improved.

A gas turbine engine for an aircraft includes a fan and a turbo-engine having a combustor that combusts compressed air and fuel to generate combustion gases and a power turbine coupled to a shaft for driving the fan. The gas turbine engine includes a direct contact condenser for condensing steam in a first flow into liquid water droplets and to generate a second flow including the liquid water droplets, a water tank for collecting the liquid water droplets of the second flow, and a water pump for introducing the liquid water droplets from the water tank into the direct contact condenser to act as condensation nuclei for the steam in the first flow. The first flow is an exhaust-vapor flow extracted from the combustion gases and the second flow is an exhaust-condensate flow from the direct contact condenser.

The invention provides a manufacturing method of a compressor piston, the compressor piston comprises a hinge groove, the hinge groove comprises a hinge hole and a mounting opening communicated with the hinge hole, the hinge hole is used for being connected with a transmission piece to achieve eccentric rotation of the compressor piston and a crankshaft and achieve air compression, and the manufacturing method is characterized by comprising the steps that a piston body is machined; the piston body is of a cylinder structure. Cutting feed is conducted from the outer wall of the piston body, at least one time of linear cutting is conducted along the inner walls of the mounting opening and the hinge hole, the hinge hole and the mounting opening are obtained at the same time, and the diameter of the hinge hole ranges from 2.8 mm to 4 mm; the hinge hole and the mounting opening are finely ground; and performing surface treatment on the piston body to obtain the compressor piston. The problems that a hinge groove of an existing compressor piston is machined through drilling, high precision is difficult to achieve, the wall breaking technology is difficult, and the machining efficiency is low are solved.

The invention discloses an intelligent cleaning robot dynamic negative pressure dust removal system based on pressure feedback. The intelligent cleaning robot dynamic negative pressure dust removal system comprises a centrifugal fan, a pressure sensor array and a control system. The centrifugal fan adopts a variable frequency speed regulation technology, so that the suction force of 500-3000Pa is dynamically adjustable; an array composed of six sets of miniature pressure sensors is arranged at a dust collection opening, and the airflow pressure difference between the air inlet end and the air outlet end is monitored in real time. The control system is integrated with a blockage self-detection algorithm, when the pressure difference exceeds a preset threshold value 0.5 kPa, a compressed air pulse back flushing program lasting for 0.2 second is triggered, and meanwhile the fan power is adjusted in a self-adaptive mode till blockage is removed. The system solves the problem that the efficiency is suddenly reduced after a traditional dust collector is blocked through a pressure feedback mechanism and an intelligent control strategy, and self-maintenance of the dust collection efficiency is achieved. Experiments show that in dust-intensive scenes such as station waiting halls, the dust removal efficiency is improved by 35% compared with that of a traditional system. The intelligent cleaning robot has the functions of real-time pressure monitoring, dynamic negative pressure adjustment and blockage self-repairing, the working efficiency and reliability of the cleaning robot in the complex environment are remarkably improved, and the intelligent cleaning robot is suitable for being used as intelligent cleaning equipment in families, public places and the industrial field.

An air supply apparatus for an aerial mobility vehicle, which is provided with a fuel cell stack, includes an air compressor mounted in the aerial mobility vehicle and configured to compress air introduced into the aerial mobility vehicle, and an air chamber provided in the aerial mobility vehicle and connecting the air compressor and the fuel cell stack, wherein the air chamber defines a conditioning space for conditioning the air having passed through the air compressor, obtaining an advantageous effect of ensuring a stable supply of air to the fuel cell stack and improving operational stability and reliability.

A gas turbine engine including a compressor section for compressing air flowing therethrough to provide a compressed air flow and a reverse flow annular vortex combustor including a combustion chamber having a primary combustion zone, the combustion chamber configured to combust a mixture of a fuel flow and the compressed air flow in the primary combustion zone to generate a primary zone vortex. The reverse flow annular vortex combustor has a combustor liner and one or more driver openings extending through the combustor liner, the one or more driver openings providing a driver air flow formed of the compressed air flow. The driver air flow enters the combustion chamber as a wall of air for shaping and driving the primary zone vortex in the combustion chamber.

A sensor cleaning device is for a vehicle and configured for cleaning a sensor surface of a sensor. The sensor cleaning device includes: a pressurized-air inlet for receiving pressurized air, a liquid inlet for receiving liquid, a cleaning port for providing the liquid and / or the pressurized air. The sensor cleaning device has a conveyed-volume region, configured to accommodate the liquid, which is fluidically connected to the pressurized-air inlet, the liquid inlet and the cleaning port, such that the liquid is conveyed in a conveying direction to the cleaning port as a result of the pressurized air being applied to the pressurized-air inlet, wherein the conveyed-volume region is realized such that, for the purpose of conveying the liquid, the pressurized air is in contact with the liquid, in particular directly and / or in a pressure-transmitting manner realizing a phase boundary.

The invention relates to the technical field of air compression stations, in particular to an air bearing-based digital energy air compression station with a noise reduction effect, which comprises a machine room, and a screw air compressor, a cooler, an oil-water separator, a first air storage tank, a dryer, a filter and a second air storage tank which are sequentially connected are arranged in the machine room. The first air storage tank is further connected with a first air supply pipe, and the second air storage tank is further connected with a second air supply pipe. An air bearing is selected for the screw type air compressor, a third air supply pipe is arranged between the filter and the second air storage tank, the third air supply pipe is connected with the air bearing, and part of compressed air is continuously input into an air path of the air bearing through the third air supply pipe. According to the screw type air compressor, mechanical friction can be avoided through the air bearing, so that noise is further reduced, the noise reduction effect of the digital energy air compressor is improved, and compressed air can be conveniently obtained by the air bearing in an air compression station.

The utility model relates to the technical field of pneumatic control, solves the problem that in the prior art, work of a double-air-source pneumatic pump needs to completely depend on a power source, and discloses an automatic air source switching device and a double-air-source pneumatic pump control system.The automatic air source switching device comprises a pump air source control device, and the pump air source control device comprises a first valve body and a second valve body; the pneumatic timing device comprises a driving shaft and a driven shaft, a driving blade is installed at one end of the driving shaft, an air injection device is arranged on one side of the driving blade, airflow or compressed air provided by an air source is used for driving a pneumatic timer, and then the pneumatic timer is used for driving position switching of the first valve element and the second valve element. The purpose of regularly switching the driving air sources of the double-air-source pneumatic pump is achieved, so that the purpose of regularly switching the driving air sources of the double-air-source pneumatic pump can be achieved under the condition that power is not supplied through a power source.

The utility model relates to the technical field of bag-type dust collectors, and discloses a low-emission environment-friendly pulse-jet bag-type dust collector, which comprises a dust collector body, and an ash bucket is fixedly mounted at the bottom of the dust collector body. According to the low-emission environment-friendly pulse-jet cloth bag type dust collector, the filter bag in the dust collector body is in a state that no airflow passes through, then the pulse device is started to carry out pulse-jet dust removal by using compressed air, and the closing time of the exhaust pipe is enough to ensure that dust stripped from the filter bag settles to the dust hopper after the dust is jetted; the phenomenon that dust is attached to the surface of an adjacent filter bag along with airflow after being separated from the surface of the filter bag is avoided, dust cleaning of the filter bag is thorough, the dust is cleaned by arranging a driving device, a first rotating shaft and a cleaning plate, the dust can continuously reach a collecting box, the dust is prevented from being attached to the inner wall of a dust hopper, accumulation is avoided, and the service life of the filter bag is prolonged. Furthermore, the dust emission concentration can be obviously reduced, and the pollution to the environment is reduced.

The invention discloses an energy consumption optimization management method and system for compressed air of an energy storage aquifer, and relates to the field of energy consumption optimization management.The method comprises the steps that an initial adjustment frequency threshold value is set by dynamically selecting regulation and control parameters, the adjustment effect is verified through a model, and equipment maintenance or replacement is automatically triggered when the threshold value is exceeded; the timeliness and the accuracy of exception processing are obviously improved; further setting a monitoring period, circularly executing data acquisition and parameter adjustment, combining real-time monitoring of maintenance cost and working time length data, dynamically optimizing an adjustment strategy and recording historical data when a threshold value is exceeded, and finally constructing a total maintenance cost-working time length mapping model to realize continuous optimization; besides, by introducing a second threshold maximum adjustment frequency and a sensor redundancy mechanism, when the adjustment does not reach the standard, a standby sensor is automatically added, and the optimization process is repeated, so that the reliability of data acquisition and the stability of the system are effectively enhanced.

The invention discloses a fuel cell heat and humidity integrated management system and an evaporation phase change cooling method thereof, and belongs to the technical field of fuel cell heat management. The system comprises an air cooling and humidifying module, a heat dissipation, evaporation and phase change module and a water recovery and distribution module. The air cooling and humidifying module distributes compressed air to an ultrasonic atomizing nozzle to be mixed with atomized water, and cooling and humidifying of main path air are achieved. The heat dissipation evaporation phase change module sprays atomized water to the surfaces of ATS radiator fins, and heat dissipation is enhanced through evaporation phase change. And the water recovery and distribution module recovers moisture in wet air at an electric pile outlet through condensation and intelligently distributes the moisture to the two atomization systems. A traditional intercooler and a traditional membrane humidifier are omitted, the air flow resistance is reduced by 15-20%, the heat dissipation efficiency is improved by 10% or above, the weight of the system is reduced by 8%, closed-loop utilization of reaction water is achieved, and the system is particularly suitable for fuel cell systems of mobile carriers such as vehicles and unmanned aerial vehicles.

The invention provides a material overturning structure of a forging and pressing machine, and relates to the field of forging and pressing equipment. The top end face of the forging and pressing workbench is fixedly connected with four supporting guide columns in a rectangular array shape. The upper parts of the four supporting guide columns are fixedly connected with a mounting seat; a hydraulic cylinder is arranged in the mounting seat; the bottom end face of an output shaft of the hydraulic cylinder is fixedly connected with a forging base. The top end face of the forging and pressing workbench is fixedly connected with a blank containing plate. The forging and pressing seat is aligned with the blank placing plate; a hydraulic station is arranged on the right portion of the forging and pressing workbench. When the machine tool shaft accessories are turned over, compressed air in the air supply piston box is fed into the air guide pipeline through a series of transmission and is blown out through the blowing frame, oxide skin generated in the forging and pressing process is blown off, and the problem that workers usually need to use tools such as air guns and the like is solved. The problems that the surface of a blank is blown and cleaned in the forging and pressing process, a worker needs to continuously and repeatedly blow and sweep, and the labor intensity of the worker is large are solved.

The invention discloses an automatic ash removal device and an automatic ash removal control method. The automatic ash removal device comprises an external structure and an internal structure. The external structure comprises a dust removal box body, an upper box body, a dust hopper, a dust discharging valve, a bracket, a dust inlet and a purified gas outlet; the internal structure comprises a filter bag assembly, a box body partition plate, a lifting mechanism, a scraper mechanism and a pressure difference transmitter; the invention provides a novel ash removal mode, the damage to the filter bag is small, a back-blowing fan and a compressed air source are not needed, and the equipment investment is saved. During gas dust removal, dust removal operation can be synchronously carried out, and the operation efficiency of dust removal equipment is improved.

The present invention belongs to the technical field of ventilation regulation in underground mines, and particularly relates to an intelligent pneumatic air window precise regulation device and method for underground mines. The regulation device includes a pneumatic air window, a controller, and an air volume sensor. The pneumatic air window is installed at the ventilation opening of the underground roadway wall in the mine and is driven by a pneumatic motor. Two air ports of the pneumatic motor are respectively externally connected to compressed air through an air pipe one and an air pipe two. The air volume sensor is installed in the underground roadway in the mine and faces the pneumatic air window. Compared with the prior art, (1) the use of the present invention can avoid repeated regulation of the pneumatic air window in underground mines; (2) the regulation method of the pneumatic air window in underground mines of the present invention adopts the method of gradually reducing the single regulation amount in proportion, making the regulation efficiency higher; (3) the intelligent pneumatic air window precise regulation device and method for underground mines of the present invention have strong applicability and can meet the regulation requirements of pneumatic air windows with different structures and different properties.

The invention belongs to but not limited to the technical field of interception nets, and particularly relates to a multi-point traction type interception net launching device which comprises a base, a power device, a launcher and an interception net. The base can be adjusted and positioned at multiple angles, the borne impact force is at least not less than 15 KN, the base is designed into a folding structure, the packaging size is reduced, and transportation and storage are facilitated; the power device adopts compressed air as a power source, an air storage chamber is filled with high-pressure air, when a switch is turned on, energy of the high-pressure air is released instantly, and huge aerodynamic force acts on the pressed area of an object, so that the object moves in an accelerated mode from a static state and is thrown out. The power device body is composed of a launching tube, an air chamber, a valve element assembly, a firing device, a trigger, a carbon fiber air cylinder, a shell and the like, the launching tube, the carbon fiber air cylinder and the shell are distributed on the two sides of the air chamber, the firing device is arranged above the air chamber, and the trigger is pressed on the firing device; the launcher is in a horn shape, and four cylindrical storage bins connected with the launching tube are arranged on the edge of the launcher.

The utility model discloses an integrated magnetic flocculation device system and relates to the technical field of water treatment devices. The device comprises a device shell, a central cylinder, a conical mud bucket, a water inlet pipe, a flocculant dosing pipe, a pipeline mixer, a gas inlet pipe for gas stripping, a coagulant aid dosing pipe, a water outlet pipe and a mud discharge pipe, according to the utility model, when water enters, a flocculant is added and mixed on a water inlet pipe by using a pipeline mixer, after water enters the magnetic coagulation area, compressed air is used as a power source for circulation and mixing, a coagulant aid is added above an air release port, supplementary magnetic powder is added to an upper opening of a central cylinder, and water subjected to magnetic coagulation reaction enters the precipitation separation area; when the magnetic coagulation reaction device is used, supernatant is collected by the water collecting tank and then discharged, precipitated sludge containing magnetic powder can slide into the conical sludge bucket to be treated again, redundant sludge is discharged through the sludge discharging pipe, the whole magnetic coagulation reaction and sludge-water separation treatment process is completed in one device, and an independent backflow system is not needed.

The invention relates to the field of instrument testing, and discloses pulse controller testing equipment, which comprises a signal simulation unit, a parameter acquisition unit, a gas circuit control unit, a main control unit and a test board, the signal simulation unit generates simulated dust concentration and pressure difference signals; the parameter acquisition unit is used for acquiring blowing interval time, duration time and output voltage signals in real time; the air path control unit provides compressed air with adjustable pressure through an air storage tank, a pressure regulating valve and a pulse valve driving module, and a pressure sensor and a flow sensor feed back signals in real time so as to adjust air path parameters. The main control unit controls the test process and judges whether the pulse controller is abnormal based on the collected data; the test bench realizes equipment fixation and connection through a clamp and an electrical / pneumatic port. The device calculates a comprehensive abnormal index through standardized parameters, supports multi-stage early warning and fault determination, and is suitable for automatic testing of the pulse controller.

There is provided a driving tool driven by air pressure of compressed air. The driving tool includes: a driving cylinder to which compressed air is supplied; a driving piston configured to move in an up-down direction inside the driving cylinder by the supplied compressed air; a driver attached to the driving piston and configured to move in the up-down direction; and a guide portion provided on a lower side of the driving cylinder. The guide portion has a guide hole through which the driver passes and an exhaust hole that allows an inside of the driving cylinder to communicate with an outside of the driving tool. The exhaust hole is provided at a position separated outward from an inner peripheral surface of the guide hole.

A sensor cleaning system for cleaning an environment sensor includes: an air cleaning system configured to clean an environment sensor by spraying compressed air; a washer fluid cleaning system configured to clean the environment sensor by spraying washer fluid onto the environment sensor; a suction cleaning system configured to suck around the environment sensor; and a controller configured to control the air cleaning system, the washer fluid cleaning system, and the suction cleaning system.

The utility model provides a split mountain drilling machine which comprises a first module, a second module and a remote gas conveying pipe, and the first module and the second module are arranged in a split mode; the first module comprises a hydraulic submodule and a power head assembly which are connected, the hydraulic submodule is used for conveying hydraulic oil to the power head assembly, and the power head assembly is used for driving a drill rod; the second module comprises an air compressor sub-module, the air compressor sub-module is connected with the first module through a remote air conveying pipe, and the air compressor sub-module is used for remotely conveying compressed air to the power head assembly. Through the arrangement, when drilling operation is carried out, after the first module is carried to a drilling operation point, the second module does not need to be carried to the same position along with the first module, the drilling operation can be smoothly carried out by remotely conveying compressed air to the first module through the second module, and the moving distance of the second module is greatly reduced; and personnel allocation for drilling operation can be reduced, single well consumption is reduced, and the drilling working efficiency is improved.

The utility model discloses a high-precision cylindrical grinder for a lead frame. The high-precision cylindrical grinder comprises a lathe bed, and a power device, a grinding wheel assembly, a diamond grinding wheel repairing cutter, a cooling assembly, an air pump, a negative pressure pump, a dust removal box, a main shaft and a driven shaft which are arranged in the lathe bed. In the grinding wheel trimming process, compressed air generated by the air pump enters the air blowing cavity along the pipeline and the air pipe connector and then enters the blowing groove through the communicating groove, airflow is blown out after the flow speed is increased through the closing opening in the tail end of the blowing groove, and a complete annular air curtain is formed on the outer wall of a part located between the chuck and the ejector pin; high-speed moving sand particles generated during grinding wheel repairing can be effectively prevented from falling on the surface of a part, the product machining quality is improved, and then smooth production of a lead frame is guaranteed.