32results about How to "Realize oil supply" patented technology

The invention relates to a supersonic engine test stand, which comprises a supply source, a temperature simulation unit, a simulation chamber, a supersonic nozzle and an exhaust ejector, wherein the supply source includes a fuel supply source, an oxygen supply source, an engine intake air supply source, an alcohol supply source and an ejector active air flow supply source; the temperature simulation unit includes a pipe body and a shell, the pipe body is located inside the shell and internally provided with a first medium channel, and the space between the outer wall of the pipe body and the inner wall of the shell forms a second medium channel; a tested engine is located in the simulation chamber; and the supersonic nozzle includes an inlet equal-straightness section, a subsonic convergence section, an initial supersonic expansion section and a supersonic expansion section which are coaxially and fixedly connected in sequence. The supersonic engine test stand is provided with a Lavalsupersonic nozzle between the temperature simulation unit and an air inlet of the engine, and realizes the simulation for the air inlet state of a supersonic engine during a supersonic engine and engine ground test.

The invention discloses a direct current motor EGR valve controller which comprises a master chip module, a power module, a direct current motor EGR valve control module, a sensor input signal processing module, a communication module, a preheating control module and an auxiliary control module. Signals obtained by the sensor input signal processing module are logically processed through the master chip module, corresponding signals are output to control the control modules to work normally and logically, so that the opening degree of a direct current motor EGR valve is accurately controlled, and the direct current motor EGR valve is made to work or tested.

The invention discloses a thin-wall high-precision static-pressure rotation workbench. A motor is arranged in a static-pressure radial and thrust joint bearing inner hole, the high thrust rigidity of the rotation workbench is obtained and meanwhile the thickness of the rotation workbench is greatly reduced. A common oil supply track and a common oil returning track are arranged to carry out oil supplying and oil returning on radial bearings and thrust bearings at the same time, and the oil way structure is simplified. A thrust oil cavity structure and a radial oil cavity structure are distributed on a bearing bush in a centralized manner, and centrality of the integral structure is improved. The static-pressure rotation workbench has the beneficial effects of being small in thickness, good in thrust rigidity and compact in structure.

The invention relates to an oil supply device provided with an oil pressing device. The oil supply device comprises a tank which is provided with an oil inlet and an oil outlet. An installing hole is formed in one side of the tank. A sealing cover is fixedly combined with the upper end face of the tank. The oil supply device further comprises the oil pressing device and oil absorbing cotton. The oil pressing device is provided with a pressing plate, a threaded rod and a rotary knob. The pressing plate is installed at the lower end of the threaded rod. The rotary knob is fixedly combined with the upper end of the threaded rod. The threaded rod is connected with the sealing cover through threads. The oil absorbing cotton is placed in the tank. The oil pressing device can extrude lubricating oil absorbed by the oil absorbing cotton out, the utilization rate of the lubricating oil is effectively increased, an operator can assemble and disassemble the oil supply device conveniently, and the oil supply device is simple in structure, economical and practical.

The invention discloses an automatic exhaust device for a transformer gas relay, and relates to the field of transformer maintenance auxiliary equipment. After gas appears inside the gas relay and anirregularly-shaped air bag is filled with gas, the irregularly-shaped air bag is expanded, a first sliding block is pushed to move downwards through the repulsive force of a magnet and a magnet blockwith same polarity, and then a second sliding block is pushed to move outwards through the wedge-shaped cooperation of the contact end face of the first sliding block and the second sliding block, sothat a broken exhaust pipeline and an oil supply pipeline are opened, automatic exhaust and oil supply are realized, and then the normal positions of the first sliding block and the second sliding block are recovered to close the exhaust pipeline and the oil supply pipeline by using the combined action of the reduction of the repulsive force of the shrunk magnet and the magnet block of the irregularly-shaped air bag in the gradual gas exhaust process. The device solves the problems that an existing gas relay exhaust device is easy to misdetect whether a fault appears in a transformer and oil cannot be supplied automatically, and is mainly used for automatically exhausting gas and supplementing transformer oil consumed inside the gas relay.

The invention relates to a rotary multi-way valve with pressure maintaining and shock preventing functions, and belongs to the technical field of fluid reversing valves. The technical problems that for an existing valve, a pressure maintaining function can not be achieved, operation is tedious, and misoperation is liable to be caused are solved. According to the technical scheme, the rotary multi-way valve with the pressure maintaining and shock preventing functions comprises a valve body, a valve element, a front end cover, a back end cover and a safety valve assembly and further comprises a valve element positioning sheet, a reset spring, a fastening screw and a spring base; a valve element hole is formed in the center of the valve body, a P-cavity annular groove is formed in the middle of the valve element hole, a T-cavity annular groove is formed in the end, close to the back end cover, of the valve element hole, the P-cavity annular groove communicates with an oil inlet, and the T-cavity annular groove communicates with an oil return inlet; the valve element is arranged in the valve element hole and can rotate around the axis of the valve element and axially move; two groups of inclined fluid working channels and two groups of parallel vertical fluid working channels are formed in the axial cross section of the valve body.

The invention relates to an application method of an engine test stand, which comprises the steps of S100), adjusting the pressure of a simulation chamber; S200), adjusting the intake air total pressure and oxygen content of an engine; S300), adjusting the intake air total pressure of the engine; S400), adjusting the intake air total pressure of the engine; S500), igniting the engine; S600), conducting a simulation test on an Nth simulated state point; and S700), repeating the step S600 until all simulated state points are completely tested, turning off the engine, closing an engine fuel supply flow regulating valve, an oxygen supply flow regulating valve, an engine intake air supply pressure regulating valve and an alcohol supply flow regulating valve, and then closing an ejector active air flow supply pressure regulating valve. The application method of the engine test stand is high in regulating speed, saves the regulating time of engine air intake simulation and flight attitude environment pressure simulation of the test stand, reduces the test cost and avoids the waste of energy.

The invention provides a hydraulic locking oil way, an engineering machinery hydraulic system and a control method thereof, and belongs to the technical field of engineering machinery. The hydraulic locking oil way includes an oil inlet path P, an oil return path T, a handle hydraulic assembly and an electromagnetic valve, wherein an oil inlet of the handle hydraulic assembly is in communication with the oil inlet path P; an oil return port of the handle hydraulic assembly is in communication with the oil return path T; the electromagnetic valve is arranged on the oil inlet path P; and the electromagnetic valve is used for controlling the circulation of hydraulic oil in the oil inlet path P. The engineering machinery hydraulic system comprises the hydraulic locking oil way, an engineeringmachinery body, a controller and a locking device. The control method of the engineering machinery hydraulic system is applied to the engineering machinery hydraulic system. Whether the handle hydraulic assembly is effectively operated by the handle can be realized by controlling the on-off state of the electromagnetic valve, so that the occurrence of major accidents is avoided.

The bearing oil supply sleeve and the bearing oil supply device comprise a sleeve body, the sleeve body is provided with an oil collecting part, a flow distribution part and a bearing installation part, and the oil collecting part is arranged on the outer wall of the sleeve body and used for collecting oil at the oil collecting part; the bearing mounting part is arranged on the outer wall of the sleeve and is used for mounting an inner ring of a bearing; the flow distribution part is arranged in the pipe wall of the sleeve or on the inner wall of the sleeve and used for distributing oil collected by the oil collection part to the bearing installation part. According to the bearing oil supply device, the oil liquid at the position of the oil collecting part is collected and transferred to the flow distribution part, the collected oil liquid is distributed to the position of the bearing mounting part through the flow distribution part, the oil liquid is transferred to the inner ring of the bearing, and oil supply to the inner ring of the bearing is achieved. The lubricating and cooling effects of the inner ring of the bearing can be improved by utilizing oil supply of the inner ring, the lubricating oil consumption and the power loss are reduced, the overall lubricating and cooling effects of the bearing can be greatly improved, and safe and reliable operation of the bearing in a high-DN value use scene is met.

The invention relates to an engine test stand, which comprises a supply source, a temperature simulation unit, a simulation chamber and an exhaust ejector, wherein the supply source includes a fuel supply source, an oxygen supply source, an engine intake air supply source, an alcohol supply source and an ejector active air flow supply source; the temperature simulation unit includes a pipe body and a shell, the pipe body is located inside the shell and internally provided with a first medium channel, the space between the outer wall of the pipe body and the inner wall of the shell forms a second medium channel; the tested engine is located in the simulation chamber; the fuel oil supply source is communicated with the tested engine through a pipeline, the oxygen supply source and the engineintake air supply source are communicated with an inlet of the second medium channel through pipelines, an outlet of the second medium channel is communicated with an air inlet of the tested engine through a pipeline, the alcohol supply source passes through an igniter and then is communicated with an inlet of the first medium channel through a pipeline, the ejector active air flow supply sourceis communicated with the exhaust ejector through a pipeline, and the exhaust ejector passes through the simulation chamber and is close to an exhaust pipe of the tested engine.

The invention provides a nacelle structure lubricating oil tank. The lubricating oil tank comprises a shell, an oil filling port, an oil supply pipe, a feathering oil supply pipe, a discharging valve,a discharging pipe, a communicating pipe, a breather pipe and a rear wall plate. The shell comprises a rear wall plate, a front wall plate, an inner skin, an outer skin and at least two sealing partitions. The at least two sealing partitions are arranged in an annular cavity enclosed by the rear wall plate, the front wall plate, the inner skin and the outer skin. At least two support partitions are arranged between the outer skin and the inner skin. The oil filling port is formed in the upper portion of the outer skin. The two sealing partitions below the outer skin are connected through thecommunicating pipe. The feathering oil supply pipe and the discharging pipe are arranged on the communicating pipe. The feathering oil supply pipe is connected with the aircraft feathering oil supplypipeline. The discharging pipe is located at the bottom of the communicating pipe. The discharging valve is arranged at the bottom of the discharging pipe. The oil supply pipe is arranged in the middle of the rear wall plate. The breather pipe is communicated with the left side and the right side of the lubricating oil tank.

The invention discloses a hybrid transmission electro-hydraulic limp control oil way and method. The hybrid transmission electro-hydraulic limp control oil way comprises a main oil way body, a manual gear shifting device, a gear shifting control oil way body and a control oil way body, wherein the control oil way body is connected with the main oil way body through a twelfth hydraulic reversing valve and comprises a first control electromagnetic reversing valve and a second control electromagnetic reversing valve which are connected with each other, the first control electromagnetic reversing valve is connected with a sixth hydraulic reversing valve, the second control electromagnetic reversing valve is connected with a second hydraulic reversing valve, a third hydraulic reversing valve, a fourth hydraulic reversing valve and a sixth hydraulic reversing valve, the third hydraulic reversing valve is connected with a brake B2IN end through the sixth hydraulic reversing valve, a seventh hydraulic reversing valve is connected with a first electromagnetic reversing valve, the fourth hydraulic reversing valve is connected with a brake B2OUT end and a fifth hydraulic reversing valve, and the fifth hydraulic reversing valve is connected with a third electromagnetic reversing valve and a fourth electromagnetic reversing valve correspondingly. By means of the hybrid transmission electro-hydraulic limp control oil way and method, a hybrid transmission can still run safely under the condition that a vehicle breaks down.

The invention relates to a turbofan engine control system and method based on a rapid prototype, and belongs to the technical field of engines. By means of the turbofan engine control system and method, the turbofan engine control system is established by using the universal rapid prototype, and various control functions such as engine oil supply, ignition and protection are achieved. Meanwhile, the system has good versatility, strong expandability, the short development cycle and low cost, is suitable for the rapid development of engine control systems in the early development stage, can greatly reduce the development cost and can shorten the development cycle.

The invention relates to a rotary multi-way valve with pressure maintaining and shock preventing functions, and belongs to the technical field of fluid reversing valves. The technical problems that for an existing valve, a pressure maintaining function can not be achieved, operation is tedious, and misoperation is liable to be caused are solved. According to the technical scheme, the rotary multi-way valve with the pressure maintaining and shock preventing functions comprises a valve body, a valve element, a front end cover, a back end cover and a safety valve assembly and further comprises a valve element positioning sheet, a reset spring, a fastening screw and a spring base; a valve element hole is formed in the center of the valve body, a P-cavity annular groove is formed in the middle of the valve element hole, a T-cavity annular groove is formed in the end, close to the back end cover, of the valve element hole, the P-cavity annular groove communicates with an oil inlet, and the T-cavity annular groove communicates with an oil return inlet; the valve element is arranged in the valve element hole and can rotate around the axis of the valve element and axially move; two groups of inclined fluid working channels and two groups of parallel vertical fluid working channels are formed in the axial cross section of the valve body.

The invention discloses a supersonic engine test bed. The supersonic engine test bed comprises an air inlet system, an engine thrust measuring rack, an exhaust system, a silencing device and a high-altitude simulation cabin, wherein the high-altitude simulation cabin is of a sealed housing structure; the engine thrust measuring rack is fixedly mounted in the high-altitude simulation cabin; a tested engine is mounted on the engine thrust measuring rack; and one end of the exhaust system penetrates through the surface of a housing of the high-altitude simulation cabin and is fixedly mounted inside the high-altitude simulation cabin, and the other end of the exhaust system fixedly communicates with the silencing device. According to the supersonic engine test bed, the supersonic air inlet state of a supersonic engine is simulated when the supersonic engine and the engine are subjected to ground tests; meanwhile, the engine thrust measuring rack is used for measuring the thrust of the engine, and the structure is simple; and in addition, the silencing device is used for reducing the use number of silencing sheets on the premise that the silencing capacity is guaranteed, the occupied area is small, the application range is wide, and meanwhile, the cost is greatly reduced.

The invention discloses an electromagnetic valve for switching a detection circuit. The electromagnetic valve for switching the detection circuit comprises a coil skeleton, a magnetic conductive plate, a magnet yoke support, a fixed iron core, a movable iron core, a valve cover, a valve body, a varnished wire, a spring, an O-shaped sealing ring and a wire harness assembly, wherein the coil skeleton is arranged on the top of the valve body; the magnet yoke support is arranged on the top of the coil skeleton; the vanished wire is wound on the exterior of the magnet yoke support; the magnetic conductive plate is arranged on the top of the magnet yoke support; the fixed iron core and the movable iron core are arranged at the center of the valve body; the fixed iron core is located above the movable iron core and is fixed at the middle of the inner wall of the coil skeleton; a spring which is vertically arranged is fixed at the lower end of the movable iron core; the lower end of the springis fixed on the top of the valve cover; the valve cover is arranged at the bottom of the valve body; the wire harness assembly is arranged at one side of the magnetic conductive plate and on the fixed frame; and the fixed frame is fixed on the side surface of the magnetic conductive plate. The electromagnetic valve for switching the detection circuit is reasonable in structure, ingenious in design, convenient to control and convenient for switching the circuit and is worthy of popularization.

The invention provides a fuel oil heating system which comprises an oil inlet pipe, the oil inlet pipe comprises an outer pipe, an inner pipe arranged in the outer pipe and a connecting rib, one end of the connecting rib is connected with the outer wall of the inner pipe, the other end of the connecting rib is connected with the inner wall of the outer pipe, and a heating channel is formed between the outer pipe and the inner pipe; the left end of the inner pipe is used for being connected with an oil inlet of an engine, and the right end of the inner pipe is used for being connected with an oil outlet of a fuel filter. The two ends of the outer pipe are connected with an engine cooling water pipeline respectively, an inner hole of the engine cooling water pipeline is communicated with the heating channel, and cooling water in the engine cooling water pipeline flows to the other end of the heating channel through one end of the heating channel. Fuel oil flowing in the inner hole of the inner pipe of the oil inlet pipe is heated through cooling water, the heated fuel oil directly flows into an engine, and therefore the fuel oil entering the engine can be well heated.

The invention discloses an energy-saving control system of a garbage compression station. The energy-saving control system comprises a power source module, an oil pressure intelligent control unit andan oil temperature monitoring and pre-warning unit. The output end of the power source module is connected with the input end of the oil pressure intelligent control unit and the input end of the oiltemperature monitoring and pre-warning unit. The oil pressure intelligent control unit comprises a PLC, the input end of the PLC is connected with the output end of a switch sensor, the output end ofthe PLC is connected with the control end of an oil pressure sensor through a relay, the output end of the oil pressure sensor is connected with the input end of a data comparator through an A / D transverter, and the data comparator is in bi-directional signal connection with the PLC. According to the energy-saving control system of the garbage compression station, an electro-hydraulic directionalcontrol valve is controlled by the PLC, a vane pump can supply oil to a rodless cavity of a compression oil cylinder, pressure maintenance of the rodless cavity of the compression oil cylinder is achieved through the PLC and an overlap-type hydraulic control one-way valve, and energy saving and consumption reduction of the equipment are achieved.

The invention provides a hydraulic locking oil circuit, a construction machinery hydraulic system and a control method thereof, belonging to the technical field of construction machinery. The hydraulic locking oil circuit includes: oil inlet P, oil return T, handle hydraulic assembly and solenoid valve, the oil inlet of the handle hydraulic assembly is connected to the oil inlet P, and the oil return port of the handle hydraulic assembly is connected to the oil return T When it is turned on, the solenoid valve is set on the oil inlet passage P, and the solenoid valve is used to control the flow of hydraulic oil in the oil inlet passage P. The construction machinery hydraulic system includes the above-mentioned hydraulic locking circuit, construction machinery body, controller and locking device. The control method of the hydraulic system of construction machinery is applied to the hydraulic system of construction machinery mentioned above. The present invention can realize the effective operation of the handle to the hydraulic components of the handle by controlling the on-off of the solenoid valve, so as to avoid the occurrence of major accidents.

The invention relates to a motor vehicle accelerating and braking combination pedal. The upper part of the brake pedal is hinged with the fixed bracket, and the brake pedal forms a releasable active connection with the fixed bracket through the magnetic attraction assembly at its upper end, and the brake pedal reset part is arranged between the brake pedal and the fixed bracket; The brake pedal and the accelerator pedal are arranged front and back, and the lower parts of the two are hinged by the lower hinge shaft. The accelerator pedal reset part is arranged between the brake pedal and the accelerator pedal. wheel, retaining ring, drive assembly and movable shaft assembly; the stopper is in contact with the outer end of the movable shaft in the movable shaft assembly. Install the fixed bracket and block on the upper and lower parts of the front side of the cab, make the existing brake lever contact with the middle part of the brake pedal, make the rear end of the existing accelerator cable connect with the circumferential surface of the sheave, and then use it . As long as the accelerator pedal is pressed continuously and quickly, the oil supply state can be quickly transformed into the braking state, thereby ensuring driving safety.

The invention discloses a direct current motor EGR valve controller which comprises a master chip module, a power module, a direct current motor EGR valve control module, a sensor input signal processing module, a communication module, a preheating control module and an auxiliary control module. Signals obtained by the sensor input signal processing module are logically processed through the master chip module, corresponding signals are output to control the control modules to work normally and logically, so that the opening degree of a direct current motor EGR valve is accurately controlled, and the direct current motor EGR valve is made to work or tested.

The invention relates to a turbofan engine control system and method based on a rapid prototype, and belongs to the technical field of engines. By means of the turbofan engine control system and method, the turbofan engine control system is established by using the universal rapid prototype, and various control functions such as engine oil supply, ignition and protection are achieved. Meanwhile, the system has good versatility, strong expandability, the short development cycle and low cost, is suitable for the rapid development of engine control systems in the early development stage, can greatly reduce the development cost and can shorten the development cycle.

The invention relates to a drive device which comprises a speed modulation gearbox (18) having a planetary gearbox (6) and a case (8), a main drive machine (1), connected to an input shaft (4) of thespeed modulation gearbox, two auxiliary drives (3.1, 3.2), each connected to the planetary gearbox (6) via a drive connection (9.1,10.1, 9.2,10.2), and an output shaft (11) of the speed modulation gearbox, which output shaft can be connected to a drive machine (2). The planetary gearbox (6) comprises a ring gear (6.1), a sun gear (6.2), a planet carrier (7) and a plurality of planet gears (6.3). The auxiliary drives (3.1, 3.2) and the input shaft (4) or the auxiliary drives (3.1, 3.2) and a power take-off shaft (5) of the planetary gearbox have an additional drive connection with a constant transmission ratio per auxiliary drive. Said additional drive connection is designed such that it can be engaged or disengaged by means of a respective shifting clutch (16.1, 16.2), the drive connections (9.1, 10.1, 9.2,10.2) from the auxiliary drives (3.1, 3.2) to the speed modulation gearbox remaining engaged in any case.

The invention discloses a hydraulic centrifugal fan of an optimized structure. The hydraulic centrifugal fan comprises a support, a spiral casing, a vane wheel, a motor and a valve block. The spiral casing is fixed to the support through a bearing base. The motor is fixed to the bearing base, and a rotating shaft of the motor extends into the bearing base and is fixedly connected with a transmission shaft. Multiple grooves in linear arrangement are formed in the outer wall of the transmission shaft. One end of a locating rod is connected into the corresponding groove in an inserted manner. Thelocating rod is connected into a storage groove of a support seat. An annular through groove is formed in the outer side wall of the bearing base and communicates with the transmission shaft. The support seat is connected into the through groove in an inserted manner. The other end of the locating rod penetrates out of the support seat and is provided with a pull ring. One end of the pull ring penetrates out of the through groove. The part, located inside the storage groove, of the locating rod is provided with a baffle. The two ends of a compressed spring abut against the baffle and the inner wall of the storage groove correspondingly. By means of the hydraulic centrifugal fan, the problem that common fans cannot be modified due to fixed structures can be solved.

The invention discloses a fuel pump device of an automobile power transmission system. The fuel pump device comprises a flange, a fuel outlet pipe, a jet tube, a jet opening, a fuel pump body, a bottom wall and a detection device, wherein the bottom wall is connected with the flange and the detection device, the fuel pump body is arranged in the bottom wall, one end of the fuel outlet pipe is connected with the flange, the other end of the fuel outlet pipe is connected with the fuel pump body, one end of the jet tube is connected with the flange, the other end of the jet tube extends to the bottom of the bottom wall, the jet opening is formed in the bottom of the bottom wall and connected with the jet tube, a part of the jet opening is arranged in the bottom wall. The fuel pump device is characterized in that the fuel pump device of the automobile power transmission system further comprises a tail wing arranged in the bottom wall and connected with the jet opening. The fuel pump device of the automobile power transmission system can prevent impurities from accumulating and is good in fuel pumping effect.

The invention relates to a driving device comprising a superposition transmission (18) with a planetary gear transmission (6) and a housing (8), a main drive machine ( 1), two auxiliary drives (3.1, 3.2) connected to the planetary gear (6) via a transmission connection (9.1, 10.1, 9.2, 10.2) each, the superposition transmission can be connected with the working machine (2) connected output shaft (11), wherein the planetary gear (6) has a ring gear (6.1), a sun gear (6.2), a planetary carrier (7) and a plurality of planetary gears (6.3), wherein, in the auxiliary drive Between (3.1, 3.2) and the input shaft (4) or between the auxiliary drives (3.1, 3.2) and the output shaft (5) of the planetary gear, there is an additional transmission connection with a constant transmission ratio for each auxiliary drive , the additional transmission connection is implemented in such a way that it can be disconnected or connected via each of the switching clutches (16.1, 16.2) present, wherein the auxiliary drive (3.1, 3.2) is connected to the transmission of the superposition transmission (9.1, 10.1, 9.2, 10.2) stay connected in each case.

The invention relates to an application method of a supersonic engine test stand, which comprises the steps of S100), adjusting the pressure of a simulation chamber; S200), adjusting the intake air total pressure and oxygen content of an engine; S300), adjusting the intake air total temperature of the engine; S400), adjusting the intake air total pressure of the engine; S500), igniting the engine;S600), conducting a simulation test of an Nth simulated state point; and S700), repeating the step S600 until all simulated state points are completely tested, turning off the engine, closing an engine fuel supply flow regulating valve, an oxygen supply flow regulating valve, an engine intake air supply pressure regulating valve and an alcohol supply flow regulating valve, and then closing an ejector active air flow supply pressure regulating valve. The application method of the supersonic engine test stand realizes a ground simulation test of the supersonic engine, is high in regulating speed, saves the regulating time of engine air intake simulation and flight attitude environment pressure simulation of the test stand, reduces the test cost and avoids the waste of energy.

The invention discloses a nut drive type static pressure lead screw pair, and relates to the technical field of static pressure spiral transmission. The nut drive type static pressure lead screw paircomprises a lead screw and a static pressure nut which are mutually matched, and further comprises static pressure composite bearings arranged at the two ends of the static pressure nut. Each static pressure composite bearing comprises at least one annular oil cavity formed in the axial end portion of the static pressure composite bearing, connected with the static pressure nut and used for achieving axial supporting of the static pressure nut, an annular oil supply groove A formed in the axial end portion of the static pressure composite bearing, connected with the static pressure nut and used for supplying oil to an oil film oil supply groove, and at least three radial oil cavities which are formed in the radial direction of the static pressure composite bearing, matched with the lead screw and used for achieving radial supporting of the static pressure nut. The nut drive type static pressure lead screw pair has the beneficial effects that limitation on the feeding speed due to the lead screw shaft critical rotation speed is avoided; reasonable oil supply of the nut drive type static pressure lead screw pair is achieved, and direct connection between an oil pipe and the static pressure nut is avoided; and axial and radial static pressure supporting of the static pressure nut is achieved, and the superior performance of the static pressure lead screw pair is improved.