484 results about "Pressure groove" patented technology

The invention discloses a device for testing a coupling function of a multi-physics field of core rock and a use method of the device. The device is a sealed barrel body which is composed of a top cover, a barrel body and a base disc; a column chamber and a temperature sensor are arranged in the device; a plunger is installed inside the column chamber; a pressure groove is arranged inside the barrel body; an airbag and a convex rubber piston are arranged inside the pressure groove; the airbag is connected with an external high pressure gas source; a gas pipeline for filling gas to the barrel body is arranged in the plunger; an acoustic emission sensor is installed inside the rubber piston; the acoustic emission sensor is connected with an external acoustic emission acquiring system; a gas discharge port is arranged on the base disc and is connected with a gas pressure difference transmitter, a gas mass flowmeter and a gas data acquirer; and electric heating wires are arranged inside the base disc. With the adoption of the device, not only the transformation and the acoustic emission activity of a coal test piece at different temperatures and stress states are recorded in real time, but also the absorption and desorption processes of coal-gas are carried out; and the visual microstructure characteristics of the coal test piece are quantified by using the CT (computed tomography) technology.

The invention relates to the production technology of a siro compact spinning covering yarn. A traditional compact spinning negative pressure pipe negative pressure groove is designed in an I-shaped straight groove mode, a cotton net is too narrow and the yarn-leakage phenomenon exists, meanwhile, the yarn hairiness is serious, evenness is poor, strength is low, fluctuation is large, and wool particles / neps are prone to being formed during a post processing process. The production technology of the siro compact spinning covering yarn enables the negative pressure pipe negative pressure groove to be designed into a V-shaped groove; meanwhile, the siro spinning technology is used, two coarse yarns are fed at the same time at one spindle position at a certain interval, the two coarse yarns are dragged respectively, an elastic filament is arranged between the two coarse filament, two fiber beams are formed in a negative pressure zone formed by the V-shaped groove after the two coarse yarns are dragged, the filament is guided to be arranged between the two fiber beams from the position behind a clustering front leather roller, and therefore the filament can be effectively wrapped, and a good covering yarn product can be manufactured.

The invention relates to a combination fluid dynamic pressure groove mechanical seal ring structure capable of automatically discharging particles. The combination fluid dynamic pressure groove mechanical seal ring structure is characterized in that on a sealing moving ring or a static ring, a circulation outer circle arc groove and a pumping groove which are symmetrically arranged about the rotation center are sequentially arranged from the high-pressure side and the low-pressure side. The outer circle arc groove is formed in the upper portion (high-pressure side) of the end face and the pumping groove is formed in the lower portion (low-pressure side) of the end face. The arc groove and the pumping groove are communicated at the contact place so as to ensure that the particles entering the pumping groove enter the arc groove by means of the pumping effect and return to a sealing cavity through medium circulation. Meanwhile, by means of the dynamic pressure effect and the pumping effect of the arc groove and the pumping groove, the bearing capacity and the low leakage amount of a liquid film are ensured. Thus, the good sealing capacity and the automatic particle discharging capacity of the combination fluid dynamic pressure groove mechanical seal can be achieved. The dynamic pressure groove is prevented from being blocked and abrasion of the sealing end face is relieved. The seal ring can be applied to working conditions including solid particle media.

Embodiments of the invention provide a slider structure able to lower a flying height compensation ratio caused by a projecting deformation of an air bearing surface of a slider by a flying height control mechanism and afford a change in flying height with a low control power. In one embodiment, a slider is provided with a leading edge, an air bearing surface, and a trailing edge. The air bearing surface includes a front pad, the front pad being made up of a front step bearing surface, leading rail surfaces, and side step bearing surfaces. The air bearing surface also includes a negative pressure groove surface surrounded by the front pad. The air bearing surface further includes a rear pad, the rear pad being made up of a rear step bearing surface formed at the same depth as the depth of the front step bearing surface and positioned on the trailing edge side, a trailing rail surface, an intermediate groove deeper than the trailing rail surface, and a trailing pad surface lying at the same height as the trailing rail surface. The front and both sides of the trailing pad surface are surrounded by the trailing rail surface.

The invention relates to a negative pressure groove end face mechanical seal structure, comprising a mechanically sealed moving ring and a mechanically sealed static ring, one side of the end faces of the moving ring and the static ring is a high pressure side namely upstream, the other side of the end faces of the moving ring and the static ring is a low pressure side namely downstream, at leastone end face of the moving ring or the static ring is provided with negative pressure groove groups which are symmetrically distributed with the center of rotation, the upstream of each negative pressure groove group is provided with a micropore annular band, each negative pressure groove group is composed of micropore dynamic pressure grooves with spiral deformation and inclination and relief grooves, the micropore dynamic pressure grooves and the relief grooves are distributed at intervals, the relief grooves are close to the terminals of the dynamic pressure grooves, and the downstream of each negative pressure groove group is provided with an annular sealing dam with a smooth plane. The invention has the beneficial effects of enhancing antijamming capability of sealing in operation athigh speed, improving dynamic pressure opening capability of a high speed seal face under the low speed working condition, realizing non-contact stability of the seal face under the high speed working condition, reducing end face contact wear, prolonging service life and improving sealing reliability.

The invention mainly aims at providing a full-automatic cleaning device of a spraying tool in the coaling industry. The full-automatic cleaning device is a necessarily-matched product during integration of a flexible intelligent coating robot unmanned system, and the production efficiency of the whole coating industry is greatly improved. According to the full-automatic cleaning device of the spraying tool, the device comprises five components including a cover, a spraying assembly, a negative pressure groove, a hopper and a supporting seat. The hopper is put into the supporting seat, and is fixed through a screw; the negative pressure groove is put on the upper portion of the supporting seat to be clamped by a check block; the cover and the spraying assembly are combined together through a fixed screw and put on the upper portion of the supporting seat for covering; and the cleaning device has the beneficial effects that the domestically-blank full-automatic cleaner device of the spraying tool is filled; the device is suitable for spraying tools such as a spraying tool and a static spin cup, and the adaptability is high; the spraying tool is mounted on a wrist of a robot and does not need to be dismounted, and in the cleaning process, full-automatic cleaning is carried out on the spraying tool; the device is efficient, energy-saving, environment-friendly and capable of greatly relieving the labor intensity of a worker, improving the working environment of a worker, improving productivity and ensuring the product; and meanwhile, the service life of the spraying tool is prolonged, VOC emissions are reduced, and the device is simple in structure, easy to mount, and free of maintenance.

The invention discloses a collision theory based self-adaption flexible seed-clearing air-suction type planter plate. The collision theory based self-adaption flexible seed-clearing air-suction type planter plate mainly comprises an involute fixation seed suction plate and a radially corrugated seed suction groove type seed suction plate. The curve of a negative pressure groove in the involute fixation seed suction plate adopts an involute curve whose polar coordinate is that R=[20(sin(t)-tcos(t))]mm, wherein t=(0-355 degrees]; the curve of a radial seed suction groove in the radially corrugated seed suction groove type seed suction plate is part of a cartesian leaf curve, the polar coordinate of the cartesian leaf curve is that R=[100tan(t)<2>/(1+tan(t)<3>)]mm, wherein t=(0-45 degrees], and an elliptic long axis with the long axis of 10mm and the short axis of 8 mm fits the distribution of the curve of a radial seed suction groove to form a corrugated seed suction groove. The radiallycorrugated seed suction groove type seed suction plate saves the additional installation of a seed clearing device, sucks and conveys the seeds and repeatedly collides to clear the seeds in the process of matched working with the involute fixation seed suction plate, the sowing speed is improved to maximally, the breaking of the seeds is reduced, and the planter plate is more simplified.

The invention relates to a high performance driller protector which is used for a mud medium ultra deep well and an ultra deep well extended reach well with strong vibration, high friction and high possibility of failure. The driller protector has the functions of lubricating strongly, centralizing, reducing friction and resistance, releasing the bushing camber wear, preventing a key slot from clamping and the driller and protecting a connector. The technical proposal is as follows: a coupling housing is arranged at a centralizer connector body, the outside surface is provided with a medium flow passage and a tapered pressure groove which are uniformly distributed on the coupling housing in a spaced way; the inner part is provided with a pair of rolling bearings directly interference arranged on the connector body; the rolling bearings and the sleeve as well as the self-lubricating obturating ring set are respectively arranged on the inner surface of the two ends of the coupling housing symmetrically; and a middle filling cavity of the two rolling bearings and a top filling cavity between the bearings and the connector body are filled with graphite. The driller protector has strong ability to decrease vibration and to release the abrasion of the drill pipe and the bushing, reduces the torque, increases the drilling ability, has a simple structure and low cost, and is used for drilling in an oil-gas field.

The invention discloses a transporting device of geothermal energy equipment, the device includes a bottom plate, the bottom of the bottom plate is fixedly provided with moving wheels, the top of thebottom plate is symmetrically provided with side pressure grooves, a spring support pad is fixedly connected at the top of the bottom plate and at a position between the two side pressure grooves, thetop of the spring support pad is provided with a placing plate, the left side of the inner wall of the side pressure groove is fixedly connected with a first limit lever, the right end of the first limit lever is fixedly connected with the right side of the inner wall of the side pressure groove, and the inner wall of the side pressure groove, away from the spring support pad, of the side pressure groove is fixedly connected with a first shock absorbing spring on. The transporting device of the geothermal energy equipment can clamp and fix the equipment of different sizes and protect the equipment from shock from the bottom and both sides, thereby effectively preventing the internal components of the equipment from being damaged due to the bumps in the transportation and transfer process,ensuring the service life of the geothermal energy equipment, reducing the maintenance cost and facilitating the use.

The invention belongs to the technical field of air-floating conveying and discloses a noncontact air-floating platform. The noncontact air-floating platform comprises an air-floating strip, a seal bottom plate and a seal ring. The lower end of the air-floating strip is provided with a cavity, the upper end face of the air-floating strip is provided with a plurality of uniform pressure grooves, each uniform pressure groove is internally provided with a plurality of pressure cavities, the bottom of each pressure cavity is communicated with one end of an orifice, the other end of each orifice iscommunicated with a buffer hole, and each buffer hole is communicated with the cavity. The upper end of the seal bottom plate is connected with the lower end of the air-floating strip, the cavity andthe upper end of the seal bottom plate form an air chamber, the upper end face of the seal bottom plate is provided with a plurality of air inlet holes, and one end of each air inlet hole is communicated with the air chamber. The seal ring is arranged between the air-floating strip and the seal bottom plate. The noncontact air-floating platform is simple in structure, environmentally friendly, clean and low in energy consumption, and air-floating support stability and anti-interference effects are improved.

The invention relates to a motorized spindle. The motorized spindle comprises a spindle system assembly, a shaft core assembly, a tool changing air cylinder assembly and a tool installing assembly; the tool changing air cylinder assembly is arranged at the upper portion of the spindle system assembly, and the tool installing assembly is arranged at the lower portion of the shaft core assembly; thespindle system assembly comprises a machine body assembly and a stator, the stator is arranged inside the machine body assembly, and the shaft core assembly penetrates the stator; the shaft core assembly comprises a center water outlet guide body and a core shaft which are sequentially connected, the middle portions of the center water outlet guide body and the core shaft are provided with channels used for cooling water circulation, a first pressure groove for high pressure gas is formed in the connecting position of the center water outlet guide body and the core shaft, and the spindle system assembly further comprises an upper bearing assembly and a lower bearing assembly; the upper bearing assembly, the machine body assembly and the lower bearing assembly are sequentially connected; and the upper bearing assembly and the lower bearing assembly are provided with oil spraying holes. According to the motorized spindle, the spindle running accuracy is improved, the spindle service life is prolonged, cooling water is effectively prevented from entering the interior of the spindle, and the spindle runs efficiently and stably.

The invention discloses a human organ epidermis adsorber for a surgical robot. The adsorber comprises a driving part, a gas transmission pipe communicated with the driving part and a suction head communicated with the gas transmission pipe, wherein the driving part comprises a cylinder body; a battery, a circuit board, a static iron core, an electromagnetic coil, a moving iron core and a spring are sequentially arranged in the cylinder body from top to bottom; the battery, the circuit board and the electromagnetic coil constitute an electric circuit; the circuit board is in signal connection with a controller; a piston cavity is formed by the electromagnetic coil and the bottom of the cylinder body; a piston is connected to the lower end part of the moving iron core and in sliding fit withthe inner wall of the piston cavity; a negative-pressure groove capable of covering the epidermis is formed in the suction head; the piston is propped against the bottom of the cylinder body under the elastic force of the spring; when the electromagnetic coil is energized, attraction force is generated to attract the moving iron core, the moving iron core drives the piston to compress the spring,and the piston moves up to enable the negative-pressure groove to form pressure far lower than the outside air pressure, so that the epidermis is adsorbed; the adsorber is suitable for adsorbing andfixing the epidermis at the operation site to prevent the epidermis from creeping during the operation of the operation robot.

The invention discloses a high-stability roadblock including a shell. Two stabilizing mechanisms are arranged in the shell; the stabilizing mechanism comprises a mounting cavity formed in the shell; the inner wall of the mounting cavity is fixedly connected with a tuning fork; a solenoid is fixedly wound on the side wall of the tuning fork; two permanent magnet plates are fixedly connected to theinner wall of the mounting cavity; an electromagnetic block is fixedly connected to the inner wall of the mounting cavity; the electromagnetic block is electrically connected with the solenoid; the lower wall of the electromagnetic block is elastically connected with a magnetic sliding plug through a tension spring; the lower wall of the shell is fixedly connected with a soft layer; the soft layerand the lower wall of the shell are jointly provided with a negative pressure groove; the lower wall of the mounting cavity is communicated with the negative pressure groove through an air suction channel; a first one-way valve is arranged in the air suction channel; an air outlet pipe is communicated with the side wall of the mounting cavity; and a second one-way valve is arranged in the air outlet pipe. According to the invention, the roadblock has good stability, is not easy to topple over, and can play a good role in prompting a driver.

The invention discloses a fabric drum with a keep plate provided with a torsional spring. The keep plate and a pressure groove are pressed conveniently through the torsional spring hinged to the keep plate, the keep plate can automatically bounce, then a cloth leftover is conveniently prefixed to a reel, the reel is driven to rotate through a rotary handle arranged at one end of the reel, the cloth leftover is wound on the reel with an annular groove and squeezed with sawteeth on the lateral wall of a long groove, and therefore the contact area of the cloth leftover and the reel is increased, the cloth leftover is effectively pressed, prevented from slipping and locked by the rotary handle. The fabric drum of the structure is convenient to operate, fabric batching is stable and reliable, slipping is avoided, and time and labor are saved.

The invention provides a production device and method of a blasting bead sanitation product. The production device for the blasting bead sanitation product is used for putting blasting beads on a sanitation product, and the sanitation product comprises a surface layer and a cotton core with a plurality of placement holes. The production device comprises a transfer roller, adsorption discs and a negative-pressure source, wherein the transfer roller can rotate, the adsorption discs are fixed, and a plurality of adsorption holes are formed in the peripheral surface of the transfer roller. The adsorption holes are used for receiving the blasting beads, a plurality of negative-pressure channels which are communicated with the adsorption holes are formed in the transfer roller, the negative-pressure channels extend in the axial direction of the transfer roller, and openings of the negative-pressure channels are formed in the end face of the transfer roller. The adsorption discs are arrangedclose to the end face of the transfer roller and provided with negative-pressure grooves which are communicated with the negative-pressure channels, and the negative-pressure grooves are communicatedwith the negative-pressure source. The transfer roller rotates to make the negative-pressure channels communicated with the negative-pressure grooves so as to adsorb the blasting beads, or to make thenegative-pressure channels separated from the negative-pressure grooves so as to release the blasting beads and make the blasting beads fall into the placement holes. Through the device, the blastingbeads can be automatically and continuously put into the placement holes in the cotton core, and automatic operation is achieved.

The invention discloses an anti-falling structure based on an AI intelligent test server power plug. The anti-falling structure comprises a shell; two inserting pieces are arranged on the side wall ofthe shell; two anti-falling mechanisms are arranged on the shell; the anti-falling mechanism comprises a fixing groove formed in the side wall of the shell. A containing cavity is formed in the shell. A placing plate is elastically connected to the bottom in the placing cavity through a pressure spring; the side wall of the placing plate is fixedly connected with a permanent magnet strip; the upper wall of the permanent magnet strip is fixedly connected with a connecting rod, the connecting rod extends into the fixing groove and is fixedly connected with a pressing plate, a control cavity isformed in the shell, the inner wall of the control cavity is elastically connected with a piston plate through a plurality of tension springs, the side wall of the shell is provided with a negative pressure groove, and the negative pressure groove communicates with the control cavity through a connecting channel. The plug can be prevented from loosening, normal work of the AI intelligent test server is ensured, and people can easily pull out the plug and insert the plug into a socket.

The invention belongs to the technical field of printing equipment, and in particular, relates to a digital printing and air sucking device and a digital printing machine. The digital printing and airsucking device comprises a printing platform and an air sucking cover plate; the printing platform is provided with a negative-pressure groove; the air sucking cover plate covers the negative-pressure groove, and is provided with multiple air sucking runners arranged side by side; each air sucking runner extends in a moving direction of a medium in a wave or sawtooth form; and multiple air sucking holes arranged in each air sucking runner in the extension direction. The air sucking area of the air sucking holes is changed from a hole form to a whole air sucking runner, so that the air suckingarea of the air sucking holes is increased, and the medium can be dried more uniformly; the dried medium is more smooth and not easy to drape; meanwhile, the drying speed is accelerated; and gaps between the runners can level the medium, so that the areas, recessed into the air sucking runners, of the medium can be leveled by the gaps between the runners during drying and curing, and the medium can be cured more smoothly and is not easy to drape.