6130results about How to "Reduce frictional resistance" patented technology

A parallel mechanism is capable of positioning and orienting an end platform with up to six or more degrees of freedom. In preferred embodiments, the mechanism includes six links having a first and second ends. The first end is connected to an end platform for supporting a tool, while the second end is connected to an actuator capable of translating the second end. A rotational drive mechanism may be provided for rotating an object mounted on the end platform at varying orientations of the end platform independently of movement of the end platform as a whole. The links may be curved in order to avoid interference between adjoining links, thereby permitting an increased range of motion and improved dexterity of the mechanism.

The invention discloses tile feeding driving mechanisms, tile feeding assemblies and a mahjong machine. Each tile feeding driving mechanism of the mahjong machine comprises a tile feeding support, a tile storage groove, a tile feeding guide rail, a tile feeding pushing head and a steel wire rope, rolling parts are arranged at the position, close to the corresponding tile feeding guide rail and / or the corresponding tile storage groove, of each steel wire rope, each rolling part is installed on the corresponding tile feeding guide rail or the corresponding tile feeding support in a rotatable mode, the part, located in the corresponding tile storage groove, of each steel wire rope are in rolling contact with the multiple rolling parts, and a gap is maintained between the part, located in the corresponding tile storage groove, of each steel wire rope and the corresponding tile feeding guide rail and / or the side wall of the corresponding tile storage groove. According to the scheme, sliding friction of steel wire ropes in the prior art is replaced with rolling friction of the steel wire ropes, friction resistance in the operation process of the steel wire ropes is greatly decreased, and the situation that the service life and operation stability of the steel wire ropes are influenced due to sliding friction contact between the part, located in the corresponding tile storage groove, of each steel wire rope and the corresponding tile feeding guide rail and / or the arc-shaped bent side wall of the corresponding tile storage groove is avoided.

Catheter device for performing atherectomy, comprising an atherectomy catheter, an OCT sensor, an IVUS sensor, position sensors and an image processing unit, which is embodied for creating combined 2D and / or 3D images based on the data of the sensors.

A fixing device for fixing an image on a recording medium includes an endless flexible fixing member formed into a loop, a heat conductive member disposed within the loop formed by the fixing member, a heater disposed near the heat conductive member to heat the heat conductive member, a pressing member pressing the fixing member against the heat conductive member to form a fixing nip, a temperature sensor detecting a temperature of the fixing member, and a lubricant disposed between the fixing member and the heat conductive member. The heater heats the heat conductive member to heat the lubricant with the fixing member stopped. The fixing member rotates after heating of the heat conductive member by the heater.

Device for carrying out rotablation, comprising a rotablation catheter, an OCT sensor, an IVUS sensor, position sensors and also an image processing unit, which is embodied for the creation of combined 2D or 3D images based on the data of the sensors.

The invention relates to a method for dosing a volume of liquid (VF) of less than 1 !l that is to be dispensed, by means of a dosing pump, in particular a pipette (2). According to said method, a tip (13) is completely filled with a liquid and contains the liquid (16) to be dispensed at least in the vicinity of its outlet (13a), a volume of gas (VL) is drawn into the tip (13) via the outlet (13a) and a volume corresponding to the sum of the volume of liquid (VF) to be dispensed and the volume of gas (VL) is then supplied to the tip (13) in such a way that the volume of liquid (VF) is dispensed via the outlet (13a) in a contactless manner. The device comprises a plurality of dosing pumps that can be simultaneously actuated, in particular pipettes (2), which can be actuated by an injection plunger (6), in addition to a motor (1), which drives the injection plungers (6) and also a valve (3), which is located between the dosing pump and its respective tip (13) in order to fill each system completely with liquid without any gas.

A forcep stopper of an endoscope includes an annular seal member disposed on an inlet of a channel through which a treatment tool is inserted. The forcep stopper has a circular hole whose diameter is dimensioned to be smaller than an outer diameter of a sheath of the treatment tool. The stopper is made of an elastic material such that the hole expands when the treatment tool passes through the hole. Further, a squeeze member is provided for inwardly squeezing the annular seal member from opposite lateral sides of the annular seal member in such a manner that the hole is tightly closed.

A hull cleaning robot includes at least one cleaning apparatus for cleaning the hull of a vessel, at least one drive track holding the robot on the hull as the robot maneuvers about the hull, and at least one turbine actuatable by water flowing past the hull for operating the at least one drive track and, optionally, the cleaning apparatus.

Device for carrying out rotablation, comprising a rotablation catheter, an OCT sensor, an IVUS sensor, position sensors and also an image processing unit, which is embodied for the creation of combined 2D or 3D images based on the data of the sensors.

The invention under consideration relates to an electric heating device for heating a flowing medium with a housing, in which the at least one electric heating element of the electric heating device is held securely and fully shielded from the medium held in the circulation chamber by a separating wall that divides the housing into a heating chamber and a circulation chamber. The circulation chamber has inlet openings and outlet openings for introducing and removing, respectively, the medium. The heating element is preferably a PTC heating element and is held by means of a clamping force in a recess formed by the separating wall, said recess preferably projecting into the circulation chamber. The invention furthermore relates to a recuperator for converting electrical energy into thermal energy, particularly for an electric drive in a vehicle.

The present invention relates to a ceramic sheet having uniform quality over its entire surface with a decreased number of defects such as foreign matters and flaws. When the ceramic sheet was divided into sections of 30 mm square or smaller, each divided section has 5 or less defects detected based on an image obtained with a charge coupled device (CCD) camera. The present invention also relates to a method of producing the ceramic sheet. In this method, a green sheet or a calcined sheet mainly including spherical ceramic particles having an average particle diameter of 0.1 to less than 5 μm was used as a spacer. By using this spacer, the green sheet for ceramic sheet slides smoothly on the spacer surface when it shrinks in baking, and the friction resistance between the green sheet for ceramic sheet and the spacer is lowered. In this manner, the method of the present invention can mass-produce the above-described high quality ceramic sheets.

The invention relates to a fold-type puncture outfit sealing system. The fold-type puncture outfit sealing system comprises a sealing membrane and a first protection device which are connected; the sealing membrane comprises a near-end opening, a far-end hole and sealing walls extending from the far-end hole to the near end, each sealing wall is provided with a near-end surface and a far-end surface, and the far-end hole is formed by a sealing lip; the first protection device comprises a near-end opening, a far-end opening and a protection wall extending from the far-end opening to the near end, each sealing wall comprises multiple folds which are externally tangent to the sealing lip and transversely and outwards extend, each fold comprises a fold peak, a fold valley and a fold wall extending from the fold peak to the fold valley, and the folds surround the sealing lip and are integrally arranged in a dish-shaped mode; the protection wall of the first protection device comprises folds of which the number is the same as that of the sealing walls and the shape and the size are matched with those of the sealing walls. According to the fold-type puncture outfit sealing system, bent stacking and winding of the protection device and the sealing membrane can be reduced, and then frictional resistance generated after inward turning is decreased.

A sliding bearing (1) includes an upper casing (3) which is made of polyacetal resin as a synthetic resin, has an annular surface (2), and serves as a first bearing body; a second bearing body (5) which is made of a synthetic resin, is superposed on the upper casing (3) so as to be rotatable about an axis (O), and has an synthetic resin-made annular surface (4) opposed to the annular surface (2); and a synthetic resin-made annular sheet (6) which is interposed between the annular surfaces (2) and (4) and slidably abuts against at least one of the upper casing (3) and the bearing body (5).

In one embodiment, a wear band comprises a rotating element having a bore receivable on a tubular, the bore comprising first and second bore portions slidably receiving first and second sleeve bearings. Outer surfaces of the sleeve bearings slidably engage the bore portions and the bores of the sleeve bearings slidably engage the tubular. A first and a second stop collars may be received on the tubular to together straddle the rotating element and sleeve bearings to longitudinally secure the rotating element in a position on the tubular. The tubular may be included within a tubular string run into a borehole or into the bore of an installed casing, such as in casing while drilling. The rotating element provides stand-off between a tubular and the wall of a bore, reduces frictional resistance to longitudinal sliding and also to rotation of the tubular string within the bore.

A friction reducing ship reduces frictional resistance between the external hull plate 1 and water W by ejecting air A from the external hull plate 1 into water W to generate micro-bubbles B on the surface of the external hull plate 1. A structural feature of the ship is that micro-bubbles B are generated by creating a negative pressure region in the water W admitted in the water intake opening 2a, disposed below the waterline WL in the bow section 1a, so as to eject atmospheric air above the water into the water to generate micro-bubbles B, and discharging the micro-bubbles B together with water to the water discharge opening 2b provided in the bottom section 1b.

The invention discloses a wing structure with flow control and separation control of laminar flow. A plurality of A micropores are arranged at the front end of the vertical center line of the upper wing surface of a wing, and are neatly arranged in lines and rows to form an inspiration zone; a plurality of B micropores are arranged at the back end of the vertical center line of the upper wing surface of the wing, and are neatly arranged in lines and rows to form an air blowing zone; a communicating channel in the inspiration zone and the air blowing zone is called an air flow channel, namely, an inlet of the air flow channel is communicated with the inspiration zone, while an outlet of the air flow channel is communicated with the air blowing zone; the air flow channel is arranged in the wing; the air flow channel consists of a front air flow channel, a middle air flow channel and a back air flow channel, wherein, the middle air flow channel is in an elliptic shape; an inspiration pump is arranged in the middle air flow channel; the front air flow channel and the back air flow channel are designed into a flaring shape and are oppositely arranged. The wing of the invention can delay the transition of a bounding layer from lamina flow to turbulent flow by a control method for adjusting the capacity of blowing and inspiration so as to reduce the frictional resistance on an object surface, and can delay the flow separation so as to improve the stall performance of wing profile.

The invention discloses a cone crusher, which comprises a frame and a movable cone main shaft arranged in the frame, wherein the lower end of the movable cone main shaft is provided with an eccentric mechanism, the eccentric mechanism is in transmission connection with a transmission assembly, a supporting assembly for supporting the movable cone main shaft is arranged below the eccentric mechanism, a hydraulic lifting system for changing the height of the supporting assembly is arranged below the supporting assembly, the hydraulic lifting system comprises a hydraulic cylinder body which is fixed on the lower part of the frame and provided with a cavity and a piston which is arranged in the cavity and moves up and down, the supporting assembly is arranged at the upper end of the piston, and the lower end of the hydraulic cylinder body is provided with a hydraulic oil port which is externally connected with a hydraulic station and communicated with the cavity. The cone crusher has the advantages of novel and unique structure and stable operation, improves the rotational speed of an eccentric sleeve, improves the work efficiency and yield thereof, prolongs the service life of a machine, reduces the use cost and avoids 'teleflex' and running vehicle.

The invention discloses a nano composite high-temperature-resistant extraction aid for thickened oil and super-thickened oil recovery. The nano composite high-temperature-resistant extraction aid is prepared from 3-8 weight percent of modified nano-silica, 3-8 weight percent of petroleum sulfonate, 10-40 weight percent of a viscosity reducer, 5-15 weight percent of an emulsifier, 2-10 weight percent of a surface wetting agent, 2-10 weight percent of a penetrating agent, 5-10 weight percent of a high polymer modifier, 1-8 weight percent of a catalyst and the balance of water. The preparation method comprises the following steps: polymerizing the petroleum sulfonate, viscosity reducer, a promoting agent and the catalyst at the temperature of 60-150 DEG C for 2-6 hours according to a ratio, adding the modified nano inorganic aid, and uniformly mixing; and finally, adding the emulsifier, surface wetting agent, penetrating agent, high polymer modifier and water according to the ratio, and mixing for 1-2 hours. The nano composite high-temperature-resistant extraction aid for thickened oil and super-thickened oil recovery has high high-temperature resistance and excellent emulsification and salt resistance, the production efficiency can be greatly improved, and the recovery rate is reduced.

The invention relates to a dual-pulse hydraulic oscillator for well drilling, and belongs to the technical fields of petroleum and natural gas exploration and well drilling tools. The dual-pulse hydraulic oscillator consists of an oscillation short section assembly and a power short section assembly, and is characterized in that the oscillation short section assembly consists of a spline mandrel, a connection sleeve, a pressure converter, an oscillation shell and the like; the power short section assembly comprises a pressing sleeve and a turbine shaft; a sealing piece is mounted between the spline mandrel and the connection sleeve; the connection sleeve is connected with the oscillation shell; the lower end of the turbine shaft is connected with the power short section assembly; the pressing sleeve at the upper end of the power short section assembly is connected with the oscillation shell; the lower end of the pressing sleeve is connected with a power shell; the turbine shaft is mounted at the center of the power shell; a straightening bearing, a turbine stator, a turbine rotor, two groups of movable valves and fixed valves, a sleeve, a flow division ring, a flow division sleeve and a thrust bearing are mounted on the turbine shaft in sequence from top to bottom. Radial swinging is avoided; under low flow, higher axial vibration with higher frequency can be realized; the friction resistance is low, so that effective drilling pressure is increased, and the mechanical drilling speed is increased.

A power operating system for opening and closing a vehicle liftgate has a pair of drive units supported on the vehicle roof and connected to the liftgate for opening and closing the liftgate. Each drive unit includes a housing having a curved track and a curved gear rack that is bodily movable endwise in the housing and guided by the curved track, the rack also serving as the drive link between the housing and the liftgate. The combined rack and drive link is extended and retracted by a pinion gear that is journalled interiorly in the housing and engages the teeth of the curved gear rack. The pinion gear is rotated by the output shaft of the motor, which in turn is fastened to the side of the housing. The motor is a reversible electric motor and is adapted to be operably coupled to the vehicle ECU unit and preferably includes an internal transmission and electrically operated clutch controlled by the ECU unit.

The invention discloses a stiffness-adjustable flexible joint actuator mechanism. The actuator mechanism is divided into an actuation end, an adjustment end and a flexible joint. The actuation end provides power for movement of the flexible joint, the adjustment end is responsible for changing stiffness of the flexible joint, and the flexible joint has the functions of relieving impact and adjusting stiffness. The actuator mechanism is additionally provided with a drive motor, and the joint can be actively driven to move. By the adoption of a variable-stiffness system in a curved bevel and rotary wheel matching structure, friction resistance is little and transmission is precise. Four absolute type encoders are installed, effective detection is achieved in the work process, sensitivity is high, and the fault rate is low. A shell is fully closed, the structure is compact, and the actuator mechanism can work in the severe environment. Changes of joint stiffness are linearly controllable from great flexibility to complete stiffness.

The invention provides a supersonic condensation and cyclone separation device, which leads air flow to generate powerful rotation in a blade-guiding manner at an entrance; then, a laval nozzle is used for coordinating with the separation device to lead the air flow to reach a supersonic speed and reduce temperature thereof greatly, thus condensing components with higher dew points and achieving the separation between the gas phase and the liquid phase under the action of the centrifugal force generated by the rotation of the air flow; and a highly-efficient liquid trap and a cyclone-recovering booster are arranged at the tail part of the nozzle. Compared with the existing supersonic separating device, the supersonic separation device of the invention has higher efficiency of separation and cyclone recovery under the same working conditions of low flow rate, for the device has the advantages that the flow channel of the device in a high-speed flow field area is smooth, the fractional resistance of the wall surface is low and the device is provided with the cyclone recovering booster suitable for the conditions of low flow rate. Since quite a lot of inland gas fields has low single-well flow rate in China, the device of the invention has wide application prospect in the field of natural gas treatment for the inland gas fields in China.

Technology for supporting personal sports performance moves from laboratory to field use only as and if instrumentation is designed both to meet its specific function(s) and to least hinder the athlete's performance. Even a standard wristwatch degrades an athlete's optimal motions when an athlete reads it while training or competing. This invention details a casing and strap (more specifically said casing's and strap's interacting shapes' and attachments' form, lie, and linkage), and controls, for a display for monitoring / sensory and / or feedback / reporting sports instrumentation, which meet both the sports instrumentation's and athlete's functional needs, as the casing and strap place the display and control diagonally across yet flush with the athlete's forearm.

The invention relates to a device for reducing guiding zone friction in high pressure formation of tubular material. It comprises dies, left punch head, right punch head, right round body on the right end face of the left punch head with right guiding ring slot, so does the right punch head, with gaps between the die, left punch head and the right punch head. It can eliminate the high touch pressure zone of the tubular end and the die guiding zone inner wall, reducing the friction resistance to improve production efficiency and die durability, and lowered requirement for tonnage.

A sliding bearing (1) includes an upper casing (3) which is made of polyacetal resin as a synthetic resin, has an annular surface (2), and serves as a first bearing body; a second bearing body (5) which is made of a synthetic resin, is superposed on the upper casing (3) so as to be rotatable about an axis (O), and has an synthetic resin-made annular surface (4) opposed to the annular surface (2); and a synthetic resin-made annular sheet (6) which is interposed between the annular surfaces (2) and (4) and slidably abuts against at least one of the upper casing (3) and the bearing body (5).

In a reciprocating piston of an internal combustion engine comprising a piston skirt having a major-thrust-side skirt portion and a minor-thrust-side skirt portion, a projected circumferential width of the minor-thrust-side skirt portion is greater than a projected circumferential width of the major-thrust-side skirt portion. Additionally, the piston skirt is dimensioned so that the minimum thickness of the minor-thrust-side skirt portion is less than the minimum thickness of the major-thrust-side skirt portion.

A waste storage device includes a container (21) in which a cassette (1) is mounted. Tubing (2) is pulled through the center of the cassette (1) to store packages (35) separated by twists. The cassette (1) is rotated relative to the container (21) to provide the twists between packages (35) by virtue of a rotatable disk (100) and user grip portion (102). The package is gripped against rotation by a gripper diaphragm (120) and is guided towards a wall of the container by a guide diaphragm (122) to prevent untwisting between packages.

The invention discloses multifunctional triaxial creep testing machine with soil body pulling, pressing, twisting and shearing functions, which structurally comprises a main body part, power supply equipment, an axial loading and measuring mechanism, a torque loading and measuring mechanism, a volume-changed water level controlling and measuring mechanism, an ambient pressure loading and measuring mechanism, a pore pressure measuring mechanism, a creeping and loading mechanism, an axial displacement measuring mechanism and a lubricating mechanism. A torque separator can apply any combined axial action and torque action; a multifunctional lever part not only can apply a tension action to a sample through a lever, but also can apply a pressure action to the sample through the lever; and a detachable split volume-changed measuring water jacket structure is remarkably changed on the aspect of soil body sample body-changed measurement. The machine provided by the invention is simple in structure, convenient to operate and high in accuracy rate and success rate.