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54results about How to "Reduce lateral distance" patented technology

Novel air film hole with improved cooling efficiency

The invention discloses a novel cooling hole capable of improving the cooling efficiency of an air film of a turbine engine. The novel cooling hole structurally comprises conical holes and a rectangular transverse groove. The rectangular transverse groove is formed in the conical holes along the direction perpendicular to the flowing direction of cold air. An included angle between the axis of each hole and a plane ranges from 10 degrees to 40 degrees, the conical holes are machined on the basis of cylindrical holes, an orifice of each conical hole is a conical opening with an opening angle which ranges from 10 degrees to 20 degrees, and the depth of the transverse groove ranges from 0.5D to 1.0D. Compared with conventional cylindrical air film hole structures, the novel cooling hole has the advantages that the exit sectional area is increased by the conical nozzle holes, so that the main flow penetrating ability of jet flow is reduced, reverse vortex pairs around the nozzle holes can be effectively suppressed, and accordingly the cooling efficiency can be improved; vertical fixed walls of the transverse groove at the lower edges of the conical holes can stop cooling air flow from flowing, so that parts of the cooling air flow flow to two sides of the novel cooling hole, and the novel cooling hole is favorable for transversely diffusing the cooling air flow; the cooling efficiency of the novel cooling hole can be improved by about 300% as compared with the traditional cylindrical air film hole under the condition of a certain blowing ratio.
Owner:QINGDAO UNIV OF SCI & TECH

Spm probe with shortened cantilever

An SPM probe with an elongated support element and a cantilever projecting beyond the front face of the support element and carrying a scanning tip, with the cantilever arranged at a front face side of the support element of the probe, protruding there from a front face side flank, and with the support element having an essentially trapezoidal cross-section with a longer and a shorter transverse edge at the face side flank, and also with critical corners at one of the transverse edges of the face side flank that are closest to a sample during the scanning process, wherein the support element has an elongated raised portion extending in the longitudinal direction of the support element and of the cantilever, with the raised portion having an essentially trapezoidal cross-section, and with the cantilever arranged on the face side on a narrow transverse edge of the raised portion of the support element, and with the raised portion with the cantilever arranged preferably at the longer transverse edge of the face side flank of the support element, and with the plane extending between the scanning tip and a theoretical straight line passing through one of the critical corners, parallel to the lateral longitudinal edges of the underside of the support element, forming an angle of tilt of at least 5 degrees relative to the transverse edge.
Owner:NANOWORLD

Crane main beam connecting rod lifting device

InactiveCN111115488AGuaranteed translational actionGuaranteed to pan up and downLifting devicesEngineeringMechanical engineering
The invention provides a crane main beam connecting rod lifting device. The crane main beam connecting rod lifting device comprises a base, a bracket, a lead screw, a power driving mechanism, a firstupper connecting rod, a first lower connecting rod, a second upper connecting rod, a second lower connecting rod, a third upper connecting rod and a third lower connecting rod. The bottom end of the first upper connecting rod is hinged to the top end of the first lower connecting rod, and the lead screw straightly moves left and right under the action of the power driving mechanism. The bottom endof the second upper connecting rod and the top end of the second lower connecting rod are hinged to the lead screw at the same time, and the bottom end of the third upper connecting rod and the top end of the third lower connecting rod are hinged to the lead screw at the same time. A parallelogram mechanism is formed by the base, the second lower connecting rod, the third lower connecting rod andthe lead screw, and a parallelogram mechanism is formed by the bracket, the second upper connecting rod, the third upper connecting rod and the lead screw. The crane main beam connecting rod liftingmechanism has the advantages that the connecting rods are hinged, the connecting rods and the other components are hinged, tooth structure do not need to be machined on the connecting rods, and machining and manufacturing are convenient; and meanwhile the problem that the tooth structures are adopted for keeping the synchronization action of the connecting rods, and consequently the use effect ispoor is avoided.
Owner:HENAN MINE CRANE

Power-assisted vehicle coaxially middle-mounted motor and power-assisted bicycle

The invention provides a power-assisted vehicle coaxial middle-mounted motor and a power-assisted bicycle, and relates to the technical field of power-assisted bicycles. The power-assisted vehicle coaxial middle-mounted motor comprises a shell, a central shaft core, an output structure, a power-assisted motor, a sun gear, a duplex planetary gear, an inner gear ring and a planet carrier, wherein the central shaft core is arranged in the shell, and the sun gear is connected to the power-assisted motor. The duplex planetary gear comprises a first planetary gear and a second planetary gear which are coaxial and fixed, and the first planetary gear and the second planetary gear are rotatably connected to the planet carrier. The first planetary gear is meshed with the sun gear, the second planetary gear is meshed with the inner gear ring, and the inner gear ring is fixed to the shell. The planet carrier can drive the output structure, and the central shaft core can drive the output structure.A power-assisted motor shaft core, the central shaft core, the sun gear, the planet carrier, the inner gear ring and the output structure are coaxially arranged. The invention further provides the power-assisted bicycle, and the coaxial middle-mounted motor is adopted in the power-assisted bicycle. According to the power-assisted vehicle coaxial middle-mounted motor and the power-assisted bicycle, the volume can be reduced and the power output performance can be increased.
Owner:深圳市奥酷曼智能技术有限公司

SPM probe with shortened cantilever

An SPM probe with an elongated support element and a cantilever projecting beyond the front face of the support element and carrying a scanning tip, with the cantilever arranged at a front face side of the support element of the probe, protruding there from a front face side flank, and with the support element having an essentially trapezoidal cross-section with a longer and a shorter transverse edge at the face side flank, and also with critical corners at one of the transverse edges of the face side flank that are closest to a sample during the scanning process, wherein the support element has an elongated raised portion extending in the longitudinal direction of the support element and of the cantilever, with the raised portion having an essentially trapezoidal cross-section, and with the cantilever arranged on the face side on a narrow transverse edge of the raised portion of the support element, and with the raised portion with the cantilever arranged preferably at the longer transverse edge of the face side flank of the support element, and with the plane extending between the scanning tip and a theoretical straight line passing through one of the critical corners, parallel to the lateral longitudinal edges of the underside of the support element, forming an angle of tilt of at least 5 degrees relative to the transverse edge.
Owner:NANOWORLD

LED plant growth lamp adjusting device and method

The invention discloses an LED plant growth lamp adjusting device and method. The LED plant growth lamp adjusting device comprises a growth lamp body. The growth lamp body is composed of a supportingbox, a sliding column, a universal column and a lamp post. A plurality of sets of LED lamp pieces are mounted on the surface of the lamp post. A sliding groove is formed in the lower surface of the supporting box in the length direction of the box. The upper end of the sliding column is movably inserted into the sliding groove. A sliding block is slidably arranged in the supporting box. A first driving motor is fixedly mounted on the side, adjacent to a transmission box, of the lower surface of the supporting box. A limiting tube is fixedly mounted at the lower end of the sliding column, a sleeve is mounted on the front side surface of the limiting tube, and a second driving motor is fixedly mounted on the rear side wall of the limiting tube. According to the LED plant growth lamp adjusting device and method, the transverse distance between the LED lamp and a plant can be shortened, the second driving motor is started, the universal column is swung to the lower end of the sliding column, the height distance between the LED lamp and the plant can be shortened, the irradiation effect of the LED lamplight is improved, and the growth efficiency of the plant can be improved.
Owner:ANHUI SHILIN LIGHTING

Grinding and polishing force control end execution device

The invention provides a grinding and polishing force control end execution device. The grinding and polishing force control end execution device comprises an outer shell, a pneumatic spindle, a grinding wheel, a cylinder, a movable piston, a tension and pressure sensor, a first limiting part and a second limiting part, wherein the pneumatic spindle vertically penetrates through the outer shell and is not fixed to the outer shell; the tail end of the pneumatic spindle is exposed to the outer shell and is fixedly provided with the grinding wheel; the air inlet end of the pneumatic spindle is insealing connection with an external air tank or an air pump; the movable piston is sleeved on a cylinder barrel of the pneumatic spindle and located in the outer shell; the cylinder is located in theouter shell, and the tension and pressure sensor is fixed to a telescopic rod of the cylinder; the tail end of the telescopic rod of the cylinder can apply horizontal and vertical force to the movable piston; the sidewall of the outer shell is provided with an arc-shaped square hole, and an outer cover is arranged at the arc-shaped square hole of the outer shell; and the first limiting part and the second limiting part are used for limiting the movable piston in the horizontal direction and the vertical direction correspondingly. The grinding and polishing force control end execution device realizes motion of the piston in the horizontal and vertical directions through one cylinder, and also realizes force control over the grinding wheel in two dimensionalities.
Owner:HEBEI UNIV OF TECH

Laser cleaning machine for cylindrical nickel screen

The invention relates to a laser cleaning machine for a cylindrical nickel screen, and belongs to the technical field of laser cleaning devices. The laser cleaning machine comprises a machine body front portion, a machine body rear portion, a cylindrical nickel screen rotating mechanism, a tail bracket mechanism, a laser emission mechanism, a motor driving mechanism, a cleaning mechanism and a transmission mechanism. By using three groups of reflectors, through the reflective cooperation of the reflectors, the directions of the beams emitted by laser tubes are changed. In the cleaning process,the cylindrical nickel screen is rotated simply by moving the cleaning mechanism, and the space occupation of the device is reduced by fixing the laser tubes and changing the arrangement way of the laser tubes. An original arrangement way that the laser tubes are perpendicular to the nickel screen is replaced. The transverse distance between the beam focuses when lasers reach the cylindrical nickel screen is shortened, that is, when the cylindrical nickel screen is cleaned, the cleaning mechanism can move a shorter distance, and by means of the structure, the cleaning efficiency can be effectively improved. By using the cleaning structure which can move independently without moving the laser tubes or a power supply thereof, the load of a motor is greatly reduced, therefore, the motor which has lower technical parameters can be selected, and the cost is saved.
Owner:NANTONG UNIVERSITY

A grinding and polishing force-controlled end effector

The invention provides a grinding and polishing force control end execution device. The grinding and polishing force control end execution device comprises an outer shell, a pneumatic spindle, a grinding wheel, a cylinder, a movable piston, a tension and pressure sensor, a first limiting part and a second limiting part, wherein the pneumatic spindle vertically penetrates through the outer shell and is not fixed to the outer shell; the tail end of the pneumatic spindle is exposed to the outer shell and is fixedly provided with the grinding wheel; the air inlet end of the pneumatic spindle is insealing connection with an external air tank or an air pump; the movable piston is sleeved on a cylinder barrel of the pneumatic spindle and located in the outer shell; the cylinder is located in theouter shell, and the tension and pressure sensor is fixed to a telescopic rod of the cylinder; the tail end of the telescopic rod of the cylinder can apply horizontal and vertical force to the movable piston; the sidewall of the outer shell is provided with an arc-shaped square hole, and an outer cover is arranged at the arc-shaped square hole of the outer shell; and the first limiting part and the second limiting part are used for limiting the movable piston in the horizontal direction and the vertical direction correspondingly. The grinding and polishing force control end execution device realizes motion of the piston in the horizontal and vertical directions through one cylinder, and also realizes force control over the grinding wheel in two dimensionalities.
Owner:HEBEI UNIV OF TECH
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