46 results about "Gas lubrication" patented technology

The invention discloses a plastic hollow plate shaping and cooling device and method, and belongs to the technical field of plastic hollow plate processing.The plastic hollow plate shaping and cooling device comprises a processing table, and a vacuum adsorption control system and an air floatation supporting control system are arranged at the two ends in the processing table respectively; two cooling mold mechanisms used for cooling the plastic hollow plate are arranged at the two ends of the top of the machining table, and a main cooling mechanism and an auxiliary cooling mechanism which are used for cooling are arranged on each of two molds of each cooling mold mechanism. Uniform negative pressure is formed through the vacuum grooves and the vacuum holes in the upper mold, a plate is forced to be attached to the cavity so as to guarantee the section shape, the lower mold forms air film support through the air injection grooves and the air injection micropores, the downward pulling force of vacuum adsorption and the gravity of the plate are counteracted, sliding friction between the plate and the lower mold is converted into gas lubrication friction, and the service life of the plate is prolonged. The problems that in a traditional shaping process, due to the fact that single-side adsorption force is too large, the top of a plate protrudes, and a hollow cavity collapses are solved.

The invention relates to the field of Stirling engines, and provides a Stirling engine oil-free lubrication cylinder sleeve and a Stirling engine, the Stirling engine oil-free lubrication cylinder sleeve comprises a cylinder sleeve body, and the inner hole wall of the cylinder sleeve body is divided into a high-speed section and low-speed sections located on the two sides of the high-speed section in the axial direction of the cylinder sleeve body; continuous net-shaped textures are arranged on the surface of the inner wall of the high-speed section, pit textures distributed in an array mode are arranged on the surface of the inner wall of the low-speed section, and the net-shaped textures and the pit textures form gradient surface textures in the axial direction of the cylinder sleeve body. The gradient surface texture is arranged on the inner surface of the cylinder sleeve according to the reciprocating speed characteristic of a piston, the high-speed section strengthens gas dynamic pressure bearing through the net-shaped texture, the low-speed section optimizes adhesion resistance and abrasive dust storage through the pit texture, the gas lubrication potential is fully released, friction reduction and service life prolonging of a dynamic sealing friction pair are achieved, and the service life is prolonged. The problems that a single surface structure of a traditional cylinder sleeve cannot be matched with the reciprocating speed difference of a piston, and the gas lubrication effect is insufficient are solved.

The utility model discloses a high-speed oil-cooled motor capable of cooling a bearing. The high-speed oil-cooled motor comprises a cylindrical shell, a front end cover and a rear end cover. And a barrel shell channel is arranged on the barrel shell. The front end cover is provided with a front bearing cooling channel which is communicated with the cylindrical shell channel. The rear end cover is provided with a rear bearing cooling channel which is communicated with the cylindrical shell channel. According to the high-speed oil cooling motor capable of cooling the bearing, after the cooling liquid enters the motor, the cooling liquid sequentially flows through the front bearing cooling channel, the barrel shell channel and the rear bearing cooling channel to cool the bearing, the bearing does not need to be provided with an additional cooling device and does not make direct contact with the cooling liquid, the risk that the cooling liquid leaks from the bearing cavity is completely eradicated, and the service life of the bearing is prolonged. The bearing can be lubricated through grease lubrication or lifelong lubrication, a circulating oil lubrication or oil-gas lubrication system does not need to be arranged, the sealing requirement of a bearing cavity is lowered, the system structure is simplified, the reliability of the system is improved, and the complexity and cost of the system are lowered.

The invention discloses a surface texturing piston ring based on a gas lubrication Stirling engine and a manufacturing method, the piston ring is made of a filled polytetrafluoroethylene material, and circular pit textures which are uniformly distributed are arranged on the sealing surface, used for forming dynamic sealing with a cylinder sleeve, of the piston ring; the radius of the circular pit texture ranges from 100 micrometers to 300 micrometers, the area occupancy of the circular pit texture on the sealing surface ranges from 10% to 40%, and the depth-diameter ratio ranges from 0.001 to 0.01. According to the method, by optimizing the geometrical parameters and the distribution form of the surface texture, enhancing the gas dynamic pressure bearing capacity and improving the piston ring-cylinder sleeve mixed lubrication condition, the problem that the piston ring is rapidly abraded and fails under the oil-free lubrication working condition is solved, the abrasion rate is reduced, the service life of a sealing piece is prolonged, and the reliability and the operation stability of the Stirling engine are improved.

The invention relates to a gas-lubricated slip ring seal assembly comprising: a slip ring seal (2) having a rotating slip ring (21) and a stationary slip ring (22) defining a first sealing gap (23) between sliding surfaces (21a), (22a); a barrier fluid system (100) configured to supply a barrier fluid to the sealing gap (23), in which the stationary slip ring (22) has a through-opening (25) for supplying the barrier fluid to the sealing gap (23) of the slip ring seal (2), in which the through-opening (25) leads from a rear side (22b) of the stationary slip ring (22) to the sliding surface (22a), wherein the barrier fluid system (100) comprises a supply passage (11) for a barrier fluid that directs the barrier fluid to a barrier fluid chamber (50) at a rear side (22b) of the stationary slip ring (22), the flow diode (110; 120); 130; 140) which has a first flow resistance in a first flow direction A from the barrier fluid system (100) towards the slip ring seal (2) and a second flow resistance in a second flow direction B opposite the first flow direction A from the slip ring seal towards the barrier fluid system (100), the first flow resistance being smaller than the second flow resistance, and wherein the flow diode is arranged in the supply passage (11) between the slip ring seal (2) and the barrier fluid system (100).

This invention provides a spindle lubrication structure and an electric spindle. The spindle lubrication structure includes a spindle core, on which a front end cover, a front end flange, a front bearing housing, a bushing, a rear bearing housing, a rear end flange, and a rear end piping disc are sequentially mounted. Multiple front bearing components are disposed between the front bearing housing and the spindle core, and a rear bearing component is disposed between the rear bearing housing and the spindle core. Multiple front lubrication channels are provided on the front bearing housing, each corresponding to one of the front bearing components. Multiple rear lubrication channels are provided on the rear bearing housing, each opposite to one of the rear bearing components. According to this invention, the technical problem of poor cooling efficiency caused by the spindle using a single inlet hole for oil and gas lubrication channel delivery in the prior art can be solved.

The invention belongs to the technical field of plastic vacuum forming machines, and particularly relates to a separated type automatic plastic vacuum forming machine which comprises plastic vacuum forming equipment, the plastic vacuum forming equipment comprises a workbench, an air cylinder is fixedly connected to the bottom of the workbench, a feeding frame is fixedly connected to the top of the workbench, and a heating plate is fixedly connected to the side wall of the feeding frame. When the mold reaches a preset position, the bottom of the sponge is in contact with the top of the plate, the built-in air suction pump is started and adsorbs the plate to the surface of the mold, the sponge continuously extrudes downwards, excessive flowing of materials is limited through elastic counter-acting force, and the stretching degree of each area is balanced; and secondly, a layer of air film can be formed between the sponge and the plate through air injection operation, friction force is reduced through the air lubrication effect, the sponge and the plate are smoothly separated, the surface of the plate can be further protected, physical damage can be further reduced, and therefore the product quality can be improved.

The invention relates to an electric machine (1) for a motor vehicle, comprising a housing (2), a stator (4) arranged at least partially in the housing (2) and non-rotatably connected to the housing (2), and a rotor (5) arranged at least partially in the housing (2), which can be driven by means of the stator (4) and is thereby rotatable about an axis of rotation (6) relative to the stator (4) and relative to the housing (2), comprising at least one gas-lubricated mechanical seal (21) arranged between a component (19) of the rotor (5) and a housing part (20) of the housing (20) for sealing the component (19) against the housing part (20).

The multifunctional electric spindle running-in table comprises a protective cover, a workbench, a center water outlet assembly, a cooling mechanism, a pneumatic mechanism and an electric control mechanism, the protective cover comprises a frame body and an outer cover, the frame body is arranged in a closed space defined by the outer cover, a protective door is installed on the front face of the outer cover, and the frame body comprises an upper layer frame and a lower layer frame. The workbench is installed on the upper-layer frame in a front-back sliding mode, a vertical support and a horizontal support are arranged on the workbench, the center water outlet assembly is arranged on the lower-layer frame, and the cooling mechanism, the pneumatic mechanism and the electric control mechanism are arranged on the outer side of the protective cover. The running-in platform has multiple functions of dust prevention, cooling, oil-gas lubrication, center water outlet testing and the like, is suitable for vertical and horizontal running-in electric spindles, meets the running-in requirements of various electric spindles such as oil-gas lubrication electric spindles, grease lubrication electric spindles and center water outlet electric spindles, can realize one-stop running-in of the electric spindles in a closed space without being externally connected with other parts, and is high in running-in efficiency. And the universality and the convenience are good.

The application discloses an oil-gas lubrication cooling device and method for a gear transmission device, which comprises the following steps: using an oil-gas lubrication system to respectively provide an oil-gas mixture to a gear oil-gas nozzle and a bearing oil-gas nozzle, the gear oil-gas nozzle sprays the oil-gas mixture provided by the oil-gas lubrication system on a gear tooth surface, and the bearing oil-gas nozzle sprays the oil-gas mixture provided by the oil-gas lubrication system on each rolling bearing; using a compressed air system to respectively provide cooling air to an end face cooling nozzle and a top cooling nozzle, a fan cooling system sucks mixed hot air containing oil and gas in a transmission gear box through an air inlet to cool the gear, and the inside of the gear transmission box is in a negative pressure environment state; and the mixed hot air containing oil and gas is subjected to oil-gas separation and recovery through an oil-gas separator. The oil-gas lubrication cooling device and method greatly reduce the lubricating oil supply required by the gear transmission device, eliminate the problems of power loss caused by stirring oil, power loss caused by pumping and extruding, large heat generation and low operation efficiency.

A roll support assembly (1) comprises a bearing block (2) and a bearing unit (4) arranged in the bearing block (2) to provide rotatable support for a journal (3) of a roll (30). The bearing block (2) is designed to have a closed in-block space (20) into which pressurized oil gas is injected to carry out oil-gas lubrication on the journal (3) and the bearing unit (4). And the in-seat space (20) is sealed and isolated from the outside through an end seal (50) arranged on the surface roller body (31) side of the in-seat space (20). And the in-seat space (20) is provided with at least one oil gas barrier (6) in an oil gas overflow channel (L) leading to the end seal (50). By allowing part of oil gas to pass through the barrier (6), the barrier (6) can reduce the oil gas pressure of the overflow channel (L) in the downstream area of the barrier (6). The invention also provides a bearing unit (4) and a filling member (7) used in the roll support assembly (1), and a rolling mill comprising the roll support assembly (1).

The invention provides a movable oil-gas lubrication station which comprises an oil storage tank fixedly mounted on the inner side of a shell, and rolling wheels are arranged at the bottom end of the shell; the liquid inlet end of the pneumatic pump is communicated with the bottom end of the inner side of the oil storage tank, the liquid outlet end of the pneumatic pump is communicated with the liquid inlet end of the stacked progressive increase distributor, and a plurality of liquid outlet ends of the distributor are respectively communicated with one liquid inlet end of the oil-gas mixing block; the gas inlet pipeline communicates with the gas inlet end of the pneumatic pump and the gas inlet end of the oil-gas mixing block; the liquid outlet end of the distributor is communicated with the liquid inlet end of the oil-gas mixing block through a connecting pipe, and the connecting pipe is communicated with the one-way valve. The device has the beneficial effects that after the roller is assembled, the station is used for supplementing oil to fully guarantee the lubricating effect, meanwhile, whether air leakage exists in other places except the exhaust hole or not is checked, the installation effect of a sealing ring is determined, the service life of a bearing is prolonged, and problems existing in the sealing installation process of a bearing seat are found in time.

A preparation method of a high-strength and high-toughness 6XXX aluminum alloy profile for automobile structural parts comprises the steps of ingredient smelting, casting, homogenization and heating treatment, extrusion forming, online quenching, stretch straightening, aging strengthening and the like, and the high-strength and high-toughness 6XXX aluminum alloy profile for the automobile structural parts is obtained by optimizing the alloy element proportion and adopting the oil-gas lubrication semi-continuous water-cooling casting, gradient heating, air-blast quenching and precise aging processes. The yield strength of the manufactured profile is larger than or equal to 200 MPa, the tensile strength is larger than or equal to 230 MPa, the ductility is larger than or equal to 10%, and no visible crack exists after a 65% total cross section compression test is conducted according to the GB / T 33910-2017 standard. The problems that the strength and toughness of a traditional 6XXX aluminum alloy cannot be achieved at the same time, and the performance and the size precision are opposite are solved, the technology is simple and convenient, the manufacturing cost is low, and the requirements of core structural parts such as automobile bumpers, energy absorption boxes and engine room longitudinal beams are met.

The utility model provides a novel intelligent oil-gas lubrication satellite station which comprises a gas circuit assembly, a mixing assembly, a gas pump assembly, a gas pump assembly, an oil-gas lubrication assembly, an oil-gas lubrication assembly and an oil-gas lubrication assembly, wherein the gas inlet end of the gas circuit assembly is communicated with an external gas pump; the oil inlet end of the oil way assembly is communicated with an external oil pump, and the oil outlet end of the oil way assembly is communicated with the mixing assembly; a plurality of connecting branches are arranged in the mixing assembly, each connecting branch is communicated with one bearing seat, and all the connecting branches are communicated with the gas path assembly and the oil path assembly. The lubricating oil distribution device has the advantages that the output oil quantity of each branch can be independently and accurately distributed, the lubricating oil distribution device is used for bearing seats with different lubricating oil quantities, accurate distribution of lubricating agents is achieved, the on-site use requirement is better met, and meanwhile energy conservation and efficiency improvement are achieved.

The utility model relates to the technical field of electric spindle oil-gas lubrication, in particular to an electric spindle oil supply integrated structure. Comprising a mounting plate, an electric thin oil lubrication pump is fixed to the upper end of the mounting plate, the outlet end of the electric thin oil lubrication pump is communicated with the inlet end of an oil filter through an oil pipe, the outlet end of the oil filter is communicated with the oil inlet end of an oil-gas distribution block through a communicating pipe, and the outlet end of the oil-gas distribution block is communicated with a lubrication channel of an electric spindle. An air filter is fixed on the mounting plate, the inlet end of the air filter is communicated with an air source, the outlet end of the air filter is communicated with the first end of a tee joint, the second end of the tee joint is communicated with an air seal interface of the electric spindle, and the third end of the tee joint is communicated with an air inlet of the oil-gas distribution block. According to the technical scheme, through integrated, intelligent and modular design, the problems that a traditional electric spindle lubricating system is complex in installation, lagged in fault response, high in maintenance cost and the like are solved.

The invention relates to a piezoelectric feedback type pore composite structure sliding block for a transmission shaft, the sliding block comprises a pore surface layer, a piezoelectric coating and a core part, and an external oil-gas lubricating pipeline provides compressed air and lubricating oil for an oil duct in the core part; the pore surface layer is of a three-dimensional micropore communicating structure, and a three-dimensional micropore channel is communicated with an oil channel in the core part; and the piezoelectric coating is arranged between the pore surface layer and the core part, converts the real-time load borne by the sliding block when the transmission shaft operates into an electric signal, and transmits the electric signal to an external collector. By arranging the pore structure on the pore surface layer, the problem of non-uniform lubrication distribution caused by large-area oil distribution of oil-gas lubrication through an oil groove is solved, and the lubrication performance of the sliding block is improved; and by integrating the load feedback piezoelectric coating, the real-time monitoring function of the slide block load is realized, and the problem that the slide block load cannot be automatically controlled is solved. By arranging the pore structure on the pore surface layer and integrating the load feedback piezoelectric coating, the problem of frequent burning loss of the sliding block in the industry is solved.

The utility model relates to oil gas lubrication technical field, and disclose bearing oil gas lubrication system, including the pump body, the upper portion fixed mounting of pump body has the upper end cover, the upper portion fixed mounting of upper end cover has the installation component, the left side fixed mounting of installation component has the installation mouth, the inside fixed mounting of butt joint mouth has the filter screen, the bottom fixed mounting of pump body has the oil outlet, the utility model discloses through the upper portion fixed mounting of multiple installation components of upper end cover, and the inside of multiple installation components installs through butt joint mouth simultaneously, the inside fixed mounting of butt joint mouth has the filter screen, the lubricating oil flow of many installation components injection is same at this time, reaches the effect that makes the average of pump body inside pressure variation, when the uneven flow of individual installation component appears simultaneously, can make the flow of other installation components adjust acceleration through flow control knob, thereby reach the effect that always keep the stability of pump body inside.

This invention relates to the field of gas-lubricated bearings, and more particularly to a wear-resistant and high-load-bearing hydrodynamic thrust bearing and its control method. By coordinating the operation of a displacement sensor, a controller, and a precision lifting platform, the wedge height of the top foil can be effectively adjusted, thereby controlling the minimum gas film thickness to be greater than a set value. This prevents the gas film gap from being too small, causing contact friction between the rotor and the top foil. Simultaneously, this invention can also actively control the ratio of the wedge height of the top foil to the minimum gas film thickness within a certain range to actively maintain the bearing's load-bearing capacity at a high level. It is generally believed that the thrust bearing's load-bearing capacity is closely related to the ratio of the wedge height to the minimum gas film thickness, with the ratio range set to 2-5. This invention can control the minimum gas film thickness to be greater than a set value to prevent contact friction between the rotor and the top foil, and can also actively control the ratio of the wedge height of the top foil to the minimum gas film thickness within a certain range to actively maintain the bearing's load-bearing capacity at a high level.

The application relates to a high-speed oil-gas lubricated hydrodynamic step thrust bearing static performance design method, which comprises the following steps: establishing an oil-gas mixture viscosity and density expression; based on the oil-gas mixture viscosity and density expression, establishing a step thrust bearing Reynolds equation and an energy equation in a polar coordinate; solving the Reynolds equation and the energy equation to calculate the static performance of the thrust bearing; carrying out static performance parameter calculation of the oil-gas lubricated hydrodynamic thrust bearing under different oil-gas mixture gas contents and working rotating speeds to obtain the influence law of oil-gas lubrication on the static performance of the thrust bearing; and taking the friction torque, the bearing capacity and the temperature rise of the hydrodynamic thrust bearing as design targets, determining the structure parameters of the bearing through sensitivity analysis of the structure parameters on the static performance. The high-speed oil-gas lubricated hydrodynamic step thrust bearing static performance design method can greatly improve the static design precision of the bearing and shorten the design cycle.

The present application relates to the technical field of wire cutting, and in particular to an oil-gas lubrication control method, system, medium, control device and wire cutting machine. The present application aims to solve the problems of low automation degree, difficult lubricant adhesion, high cost and low cleanliness of the bearing box lubrication mode. For this purpose, the oil-gas lubrication control method of the present application is used for an oil-gas lubrication system, and the control method comprises: when the oil-gas lubrication interval length of the part to be lubricated reaches the preset interval length, controlling the oil-gas lubrication system to inject oil-gas into the part to be lubricated; when the oil-gas lubrication duration reaches the first preset duration, controlling the oil-gas lubrication system to stop injecting oil-gas into the part to be lubricated. The present application can realize intermittent automatic supply of oil-gas to the part to be lubricated, improve the automation degree of lubrication, and improve the adhesion effect. The artificial cost is reduced, and lubrication pollution is not easily caused.

The invention discloses a Stirling engine honing cylinder sleeve based on gas lubrication, the cylinder sleeve is made of a stainless steel material, and after ion nitriding treatment, the inner surface of the cylinder sleeve is provided with uniformly distributed cross honing reticulate pattern textures; the cross angle of the cross honing reticulate pattern texture ranges from 30 degrees to 150 degrees, the groove depth ranges from 0.1 micrometer to 0.5 micrometer, the width-to-distance ratio ranges from 0.2 to 0.5, the line width ranges from 20 micrometers to 100 micrometers, and the line distance ranges from 200 micrometers to 800 micrometers. According to the invention, by optimizing the geometrical parameters, the processing technology and the surface state of the honed reticulate pattern on the surface of the cylinder sleeve, enhancing the gas dynamic pressure bearing capacity, improving the piston ring-cylinder sleeve mixed lubrication condition, reducing the frictional wear under the oil-free lubrication working condition, solving the problem of quick wear failure of the piston ring, reducing the wear rate of the piston ring, and prolonging the service life of a sealing element; and therefore, the reliability, the operation stability and the power density of the Stirling engine are improved.

The utility model discloses a seal capable of being used for bearing ventilation and heat dissipation of a roll bearing seat, which comprises a bearing body, the bearing body comprises an outer bushing and an inner bushing, and a plurality of groups of balls are uniformly arranged in the middle of the outer bushing and the inner bushing in a surrounding manner. A ventilation and heat dissipation sealing assembly is arranged in the middle of the outer bushing and the middle of the inner bushing and located over the balls. The bearing body and the sealing assembly are installed in the bearing seat together and assembled with the roller to form the notch, and after the bearing seat is connected with an oil-gas lubricating system, the notch is used for releasing the temperature generated in the operation period of the bearing body, so that the temperature in the operation period of the bearing body is reduced, and the service life of the bearing body is prolonged. The condition of high temperature or burnout caused by overhigh internal temperature due to temperature rise of the bearing body caused by long-time high-load operation of the bearing body is reduced, the working condition environment can be effectively improved, the service life can be effectively prolonged, and therefore the probability that the bearing is damaged due to temperature rise in the use period is reduced, and the replacement cost after the bearing is damaged is reduced.

A guide wheel waterproof structure comprises a bearing seat and a wheel shaft which are rotationally connected. At least part of the outer end face of the axle is close to the outer end face of the bearing seat, at least one flange is arranged on the outer end face, close to the bearing seat, of the axle, and the flange is provided with a first radial groove facing the axle. According to the utility model, the flanges are designed on the outer end surfaces of the wheel shaft and the bearing seat, and the radial first grooves facing the wheel shaft are formed in the flanges, so that external liquid can be collected into the first grooves along the wall when flowing in, and water can be effectively prevented from entering a contact area of the bearing and the wheel shaft; meanwhile, in the rotating operation process of the wheel shaft, under the action of centrifugal force, liquid collected in the first groove can be thrown out, the process from water collection to water drainage is achieved, water is effectively guided into the grooves and drained, under the condition that oil-gas lubrication is omitted, water is prevented from directly invading into the bearing, the bearing is prevented from being corroded and abraded by the water, and the service life of the bearing is prolonged. The service life of the bearing is prolonged.

The invention discloses a distributed oil-gas lubrication system for a steel rolling rotating hub area and a cooperative control method thereof, and relates to the technical field of steel rolling rotating hub area lubrication.The distributed oil-gas lubrication system comprises a hydraulic main station and a gas source, the hydraulic main station and the gas source are connected to a plurality of oil-gas substations, and the oil-gas substations correspond to different areas of the steel rolling rotating hub area; the oil-gas substation comprises an oil inlet pipeline and a gas inlet pipeline which are respectively communicated with the hydraulic main station and the gas source, an oil inlet valve and a gas inlet valve which are used for controlling opening and closing are respectively arranged on the oil inlet pipeline and the gas inlet pipeline, the oil inlet pipeline is communicated to a progressive distributor, and the progressive distributor and the gas inlet pipeline are communicated to an oil-gas mixing block; and the output end of the oil-gas mixing block is communicated to each lubricating point in the corresponding area. Through a distributed architecture and substation independent control, the equipment availability and the production continuity are improved; and meanwhile, on-demand lubrication is achieved, waste of a low-temperature area is avoided, and the effect of saving lubricating oil consumption is achieved.

The utility model discloses a quick emptying device for diesel oil of an engine, which belongs to the technical field of engines and solves the problem of low efficiency of the existing fuel oil emptying method. The rapid diesel oil emptying device for the engine comprises a cart, an oil drum is arranged on the cart, a pneumatic diaphragm pump is arranged on the cart above the oil drum, an oil return pipe is arranged at an oil outlet of the pneumatic diaphragm pump and communicated with the oil drum, a support is arranged on the cart on one side of the pneumatic diaphragm pump, and the pneumatic diaphragm pump is arranged on the support. The support is detachably provided with an air source triple piece, the air source triple piece comprises an air lubricator, a pressure regulator and an air filter which are communicated in sequence, an air inlet of the air lubricator is provided with a first air inlet branch pipe communicated with the air lubricator, and the other end of the first air inlet branch pipe is provided with a three-way connector; and one interface of the three-way joint is provided with an air inlet header pipe. According to the quick emptying device for the diesel oil of the engine, the working efficiency is effectively improved.

A motor bearing system has: a slide bearing operable as a gas-lubricated bearing by gas supplied from a pump; a rolling bearing; and a controller. The controller controls the pump such that, when the motor rotation speed is equal to or higher than the first speed and is lower than the second speed, the slide bearing functions as a bearing that supports the rotary shaft and the slide bearing is operated as the gas-lubricated bearing, and when the motor rotation speed is equal to or higher than the second speed, the pump is stopped. In addition, even in the case where the motor rotation speed is equal to or higher than the second speed, the controller does not stop the pump when a radial load applied to the rotary shaft of the motor is equal to or larger than a predetermined value.

The utility model relates to the technical field of steelmaking, in particular to an oil-gas lubricating device of a strip steel grinding machine, which comprises a transfer box and a storage box, the transfer box and the storage box are arranged on one side of the strip steel grinding machine, the output end of the transfer box is communicated with the input end of the storage box through a connecting pipe, and the input end of the transfer box is communicated with an oil-gas input pipe. By arranging the transfer box, the storage box and other structures, an original infiltration lubrication mode is changed into an oil-gas lubrication mode, on one hand, a large amount of lubricating oil can be saved, so that the production cost is reduced, on the other hand, the production efficiency is improved, the fault rate is reduced, and the production efficiency is improved. And the economic benefit is further improved.

The invention relates to the field of metal material processing, in particular to a continuous oil-gas lubrication casting method of an aluminum alloy round cast ingot, which comprises the following steps: depositing a composite ceramic coating on the working surface of a graphite ring lining of a hot top crystallizer, premixing lubricating oil and high-purity nitrogen, and forming a rotational flow state through a vortex generator, and after the aluminum alloy melt is preliminarily solidified in a crystallization area, secondary cooling is conducted through an adjustable pulse water cooling system, in addition, the system is provided with a reverse flushing loop, and when casting is intermittent or pressure is abnormal, a three-way valve can be switched to inject high-pressure nitrogen to clean an oil gas channel. By optimizing the structure of the hot top crystallizer and introducing an efficient oil-gas lubricating system and an intelligent control strategy, the problems that lubrication is uneven, the surface quality of cast ingots is poor, the crystallizer is fast to wear, the system is prone to being blocked and the like in traditional casting are solved, and the cast ingot quality, the production efficiency and the equipment reliability are improved.

The invention discloses an air floatation moving bearing surface type supercritical carbon dioxide static pressure thrust bearing pressure distribution measuring device, and belongs to the field of gas lubrication and performance detection. The device mainly comprises a vibration isolation plate, a bearing platform with a pressure measuring hole, a linear air floating guide rail, an arc-shaped air floating guide rail, a double-layer chamber, a labyrinth seal, a static pressure gas bearing, a sensor and a collector. According to the device, the two-dimensional, non-contact and friction-free movement of the bearing platform is realized by combining the air floating guide rail and the labyrinth seal, the pressure measuring hole is driven to be aligned with any position to be measured, and the continuous and complete measurement of the pressure of the bearing surface is completed. An inner-layer cavity of the device is used for containing supercritical carbon dioxide and a hydrostatic bearing; compressed air is introduced into the outer-layer cavity to form a positive-pressure air barrier, so that a medium in the inner cavity is prevented from leaking to the atmospheric environment. The method solves the problem that a traditional method is limited in measuring points and cannot adapt to the supercritical carbon dioxide medium environment, and can also be used for pressure distribution testing of other high-pressure and special medium hydrostatic bearings.

The utility model provides a kind of electric main shaft cooling lubrication structure and electric main shaft, it is related to electric main shaft cooling lubrication structure technical field, solve the technical problem that the existing technology exists, every group bearing needs to set up separate oil circuit to cool, oil circuit structure is complex and can lead to the technical problem of electric main shaft damage.This electric main shaft cooling lubrication structure includes oil inlet passage;At least two groups of conducting loop, each group of conducting loop includes at least two oil distribution passages, at least two oil distribution passages are sequentially arranged along oil inlet passage;And one end of each oil distribution passage is communicated with oil inlet passage, the other end of each oil distribution passage is communicated bearing mounting cavity, at least two oil distribution passages can form the loop of relative conduction between oil inlet passage and bearing mounting cavity;Oil outlet passage, oil outlet passage is communicated with bearing mounting cavity;And / or, oil outlet passage is communicated with oil inlet passage.The utility model is used to provide a kind of electric main shaft cooling lubrication structure and electric main shaft for improving oil gas lubrication efficiency, prolonging electric main shaft service life.