42results about How to "Reduce torque value" patented technology

A torque limited fitting is provided having a head and a body, which in certain embodiments may be assembled by an operator. The body of the torque limited fitting has a passageway therethrough for receiving and removably holding tubing. The torque limited fitting may be adapted for use with a flat bottom port, such as in an analytical instrument, like liquid chromatography, gas chromatography, ion chromatography, or in in vitro diagnostic systems.

The invention discloses a pre-tensioned track board assembly-unit production tooling device and method. The tooling device comprises a track board mould, tensioning rods, tensioning devices, a pouring device, a rapping device, a steam curing device, relieving devices and demoulding devices. By adoption of the pre-tensioned track board assembly-unit production tooling device, the mould capable of being used repeatedly and apparatus which is used for tensioning, relieving and demoulding a track board and adapts to the mould are adopted for production of the track board, the track board can be jacked up from the bottom of the mould, the mould is separated from the track board, and the purpose that the mould is fixed and not detached in use is achieved. Compared with an existing technical concept, the tooling device is advanced, the mechanization degree is high, manpower demand amount in the track board production process is decreased, and the track board production efficiency is improved; and due to the fact that the used mould does not need to be separately closed or detached before and after each track board is produced, the uniformity of produced track boards by means of the mould is good.

A method reduces a time delay or lag between a commanded upshift and a resultant upshift event in vehicle. The method detects the commanded upshift, calculates a scheduled engine torque reduction torque value as a function of an unmanaged torque, and reduces an input torque value from the engine using the calculated scheduled torque. A powertain includes an engine, a transmission, a torque converter, clutches that are selectively engageable to provide at least six forward speed ratios, a reverse speed ratio, and a neutral condition, and a controller. The controller has an algorithm controlling an operation of an off-going clutch and the on-coming clutch during a speed ratio change representing an upshift event. The algorithm calculates a scheduled torque value as a percentage of an unmanaged torque level of the engine, and controls the off-going and on-coming clutch through the speed ratio change using the calculated scheduled torque value.

A single-die injection pump for high-speed internal combustion engines which, because of its compact design and good volumetric efficiency, in conjunction with a high oscillation frequency of the piston, has a pumping quantity comparable to a multiple-die injection pump, without causing excessively high peak torque values in the drive of the single-die injection pump.

There are provided tapered roller bearings which support a pinion shaft. Inner races have large rib faces each having a recessed surface shape on which large-diameter end faces of tapered rollers slide. The surface roughness of the large-diameter end face is σ1 [μmRa] is 0.025 or more. In addition, assuming the surface roughness of the large rib face is σ2 [μmRa], (σ12+σ22)1 / 2 is 0.17 [μmRa] or less. The sliding portion of the large-diameter end face and the sliding portion of the large rib face are made of a carburized steel, and the carbon content in a matrix phase in a surface layer portion of each of the sliding portions to a depth of 50 μm from a surface is 0.8 wt % or more, the surface hardness thereof is in the range of Rockwell C63 to 67, and a surface retained austenite amount is set to be 20% or more and 25% or less.

A torque limited fitting is provided having a head and a body, which in certain embodiments may be assembled by an operator. The body of the torque limited fitting has a passageway therethrough for receiving and removably holding tubing. The torque limited fitting may be adapted for use with a flat bottom port, such as in an analytical instrument, like liquid chromatography, gas chromatography, ion chromatography, or in in vitro diagnostic systems.

The invention provides a power down flow processing method of a Plug-in automobile. The power down flow processing method comprises reducing a torque value of an engine to a firth preset scope when receiving key OFF gear signals, then reducing a rotate speed value of a generator to a second preset scope, sending stop instructions to a battery control unit, enabling the battery control unit to control a battery to stop power supply, sending instructions for closing an insulated gate bipolar translator (IGBT) to the generator, and discharging electric energy in the generator. The IGBT in the generator is closed after the torque value of the generator is reduced to the firth preset scope and the rotate speed value of the generator is reduced to the second preset scope, a load torque of the engine is small, a power generation assembly produces small electric energy, a direct current side of the generator cannot produce high transient voltage in the moment when the IGBT is closed, performance of the IGBT is not influenced, and service life of the generator is prolonged.

The invention provides a high-heat-resistance modified PGA material and a preparation method thereof. The modified PGA material is prepared from the following raw materials in parts by weight: 70-80 parts of polyglycolic acid resin, 5-15 parts of filler, 10-30 parts of castor oil mixture and 0.5-1 part of nucleating agent; wherein the castor oil mixture is a mixture of castor oil with purity of 90% and methanol, and the mass ratio of castor oil to methanol is 7.5-8.5:2. The nucleating agent is selected from one or more of talcum powder, inositol and sebacic acid dimethylbenzene hydrazide; the filler is selected from one or more of nano montmorillonite, nano calcium carbonate and edible starch. The castor oil mixture, the nucleating agent and the filler are used for modifying the polyglycolic acid resin, so that the modified PGA material has high crystallization performance and can be used for preparing high-heat-resistance products.

The invention relates to modified high-density polyethylene composition used in extrusion blow molding, and a preparation method thereof. The composition comprises blended components of, by weight: 100 parts of high-density polyethylene, 0.5-15 parts of powdered styrene-butadiene rubber, and 0.1-1.0 parts of a lubricant. The modified high-density polyethylene composition provided by the invention has relatively high toughness, relatively high high-temperature impact resistance, relatively high low-temperature impact resistance, good fluidity, and low extrusion torque value. The preparation method provided by the invention is advantaged in easy processing. With the method, products such as casing barrels, casing pots and automobile fuel tanks with high impact resistances can be manufactured by extrusion blow molding.

The invention relates to the technical field of vehicle control, and provides a driving wheel rotating speed control method and system. The method comprises the steps that: whether a current vehicle condition meets a preset wheel speed control condition or not is judged, and if the current vehicle condition meets the preset wheel speed control condition, the following step is executed: a current rotating speed difference of two driving wheels connected to the same differential mechanism of a vehicle is obtained in real time, and under the condition that the current rotating speed difference islarger than a preset first threshold value, a torque value output by the vehicle is controlled to be reduced; and the driving wheel rotating speed of the vehicle is controlled based on the reduced torque value. According to the driving wheel rotating speed control method and system, damage and ablation of the differential mechanism are prevented.

A method of setting the clearance of a tapered roller bearing assembly of the type having a housing with an access opening, and in which housing is positioned an input shaft engaging a worm or gears for driving an output gear engaging an output shaft mounted on a bearing assembly for transmitting power. The method includes the steps of first tightening a removable cover in the housing to a point in contact with the bearing assembly and having a predetermined torque value, and thereafter backing the cover away from the bearing assembly by a distance calculated by the following formula: End play setting angle in degrees=(360 degrees)×(Clearance constant)×(Desired bearing clearance in inches) / (Thread pitch in inches). This method achieves a correct clearance setting defined by the end play setting angle in degrees where the cover is rotated by the number of degrees in the end play setting angle to reduce the predetermined torque value. The last step is to lock the cover in a position that defines the correct clearance setting.

The invention relates to the field of well completion sand prevention of gravel filling of horizontal wells and discloses a feeding grip releasing tool for gravel filling of a sand control pipe column of the horizontal well. An in-pipe suppressing grip releasing mode or an out-pipe suppressing grip releasing mode can be adopted, and the feeding grip releasing tool is composed of three parts including a seat seal conversion mechanism, a positively-rotary feeding mechanism and a hydraulic stage-by-stage grip releasing mechanism; the upper end of the seat seal conversion mechanism is in threaded connection with a piston of a seat seal tool body, and the lower end face of the seat seal conversion mechanism directly make contact with a packer external pushing cylinder needing to be fed; and the positively-rotary feeding mechanism and the hydraulic grip releasing mechanism are sequentially arranged in the seat seal conversion mechanism from top to bottom, the upper end of the positively-rotary feeding mechanism is in threaded connection with a core shaft of the seat seal tool body, and the lower end of the hydraulic grip releasing mechanism is in threaded connection with other service tool bodies. According to the feeding grip releasing tool for gravel filling of the sand control pipe column of the horizontal well, in the process that the sand control pipe column is put into the well, positively-rotary in-putting can be achieved, blocked possibility of the pipe column is reduced, the grip releasing mode has two types including the hydraulic type and the mechanical type, hydraulic grip releasing is low in pressure, the shear value is stable and reliable, the torque value of the pipe column is low in the mechanical grip releasing process, and the operation security coefficient is high.

A method of protecting a hydrocarbon pump (6) from excessive flow rates in a system for pumping a hydrocarbon fluid, which system comprises said pump and an electrical motor (10) for driving the pump. The method comprises the steps of: for each of a plurality of gas volume fraction values of the hydrocarbon fluid, establishing a maximum torque limit for the pump by mapping the maximum allowable torque of the pump as a function of the differential pressure across the pump, thereby creating a plurality of maximum torque curves (4), each representing the maximum torque limit for a unique gas volume fraction value; from the plurality of maximum torque curves (4), establishing a master maximum torque curve (5) which represents the maximum torque limit for all gas volume fraction values; monitoring the torque of the pump and the differential pressure across the pump; based on the monitored differential pressure (DP′) and using the master maximum torque curve, establishing a maximum allowable torque (T′) for the pump; and taking a predetermined action if the monitored torque exceeds the established maximum allowable torque (T′), e.g. raising an alarm and / or shutting down the system.

The invention provides a rotor stator structure of a permanent magnet brushless DC motor, which belongs to the technical field of motors. It solves the problems of low torque density and control precision of the existing permanent magnet brushless DC motor. The stator structure of the permanent magnet brushless DC motor includes stator teeth, stator slots and stator windings. The stator teeth include a number of armature teeth and auxiliary teeth. The width of the top and teeth, a number of armature teeth and a number of auxiliary teeth are spaced apart from each other in turn, a stator slot is formed between adjacent armature teeth and auxiliary teeth, the stator winding is embedded in the stator slot and each armature tooth Both are wound with a stator winding. The motor adopts the unequal tooth width design of the armature teeth and auxiliary teeth, which improves the winding coefficient of the motor. At the same time, by rationally designing the tooth width of the armature teeth and auxiliary teeth, the distribution of the magnetic density of the teeth is optimized to avoid saturation of the teeth and improve The output torque of the motor is improved, and the control accuracy of the motor is improved.

There are provided tapered roller bearings which support a pinion shaft. Inner races have large rib faces each having a recessed surface shape on which large-diameter end faces of tapered rollers slide. The surface roughness of the large-diameter end face is σ1 [μmRa] is 0.025 or more. In addition, assuming the surface roughness of the large rib face is σ2 [μmRa], (σ12+σ22)1 / 2 is 0.17 [μmRa] or less. The sliding portion of the large-diameter end face and the sliding portion of the large rib face are made of a carburized steel, and the carbon content in a matrix phase in a surface layer portion of each of the sliding portions to a depth of 50 μm from a surface is 0.8 wt % or more, the surface hardness thereof is in the range of Rockwell C63 to 67, and a surface retained austenite amount is set to be 20% or more and 25% or less.

The invention discloses a mixed olefin grafted microsphere reinforced flame-retardant nylon 6 composition and a preparation method thereof. The nylon 6 composition is prepared by blending the following raw materials in parts by weight: 100 parts of nylon 6, 1-10 parts of polyethylene glycol; and 1-20 parts of mixed olefin grafted microspheres. The preparation method comprises the following steps: melting and blending the components according to the dosage to obtain the nylon 6 composition. According to the invention, the dispersity of glass fibers, flame retardants and other materials and polyolefin matrix affinity fillers can be greatly improved. Therefore, the dispersion of the flame-retardant material and the glass fiber in the polyolefin can be effectively enhanced, and the mechanical property and the flame-retardant effect of the material are improved.

A shift device includes an output shaft, a hub, a speed gear, a sleeve, a synchronizer ring, lever members, and a spring. The lever members have torque receiving portions contactable with projections of the synchronizer ring to receive friction torque from the projection. Contact positions of the torque receiving portions and the projections in a synchronization operation are set at a hub side of the lever members and within an axial-directional distance being less than a thickness of the lever member between the points of support of the lever members and the contact positions.

The invention discloses a reciprocating pump valve deck and a matched valve box thereof, belongs to the technical field of petroleum engineering equipment, and aims to solve the problems that an existing equipment valve deck is unreliable in fixing and a valve box is short in service life. The valve deck comprises the valve box and a valve deck body, a valve box inner cavity is formed in the valvebox, valve box screw holes are formed in the upper portion of the valve box inner cavity, and a plurality of valve box screw holes are formed in the upper surface of the valve box. The valve deck body comprises a valve deck cone and a valve deck boss, a valve deck sealing groove is formed in the valve deck cone, a sealing ring is mounted in the valve deck sealing groove, a valve deck chamfer is arranged on the bottom surface of the valve deck cone, a plurality of valve deck through holes are formed in the valve deck boss, and the valve deck through holes are circumferentially formed along thevalve deck boss. Double-head studs are arranged, one end of each double-head stud is in threaded connection with the corresponding valve box screw hole, the other end of each double-head stud is sleeved with the corresponding valve deck through hole, and the double-head studs are sleeved with nuts above the valve deck through holes and are in threaded connection with the nuts. The reciprocating pump valve deck and the matched valve box thereof are disclosed.

The invention provides a composition containing polyethylene glycol terephthalate, and is characterized in that the composition contains the polyethylene glycol terephthalate, polyethylene glycol, fumaric acid, sodium carbonate, glass fibers and a nucleating agent, wherein relative to 100 parts by weight of the polyethylene terephthalate, the composition comprises 0.3-5 parts by weight of the polyethylene glycol, 0.01-0.3 parts by weight of the fumaric acid, 0.02-0.6 parts by weight of the sodium carbonate, 10-55 parts by weight of the glass fibers and 0.3-0.7 parts by weight of the nucleating agent. The invention further provides a preparation method of the composition containing the polyethylene glycol terephthalate. Compared with present PET material, the composition containing the polyethylene glycol terephthalate is relatively easy to process and for injection molding.

The present invention relates to sealing valves used in the petroleum and gas extraction industry, in particular but not exclusively, to medium- or high-pressure ball valves. In particular, the present invention relates to a sealing assembly (101, 102) for ball valves (1), and to a ball valve comprising such an improved sealing assembly. The sealing assembly ensures excellent sealing performance at low and high pressures by exclusively using a thermoplastic material sealing element (31), thus completely eliminating the drawbacks which afflict the sealing system of known type, in particular in relation to the reliability of the sealing elements made of elastomeric material.

The invention discloses an anti-typhoon LED street lamp, which comprises an embedded base, a hydraulic barrel, a hydraulic rod, a lighting device, an anti-torque system, a pressure relief device, a torque detection module, a dustproof cover plate, a dustproof movable plate and a wire, wherein the anti-torque system, the pressure relief device and the torque detection module are arranged in the embedded base. According to the invention, the anti-torque system is arranged, when there is a typhoon, if the force borne by the lighting device is too large, the force borne by the lighting device is applied to a torque shaft through the hydraulic barrel and the hydraulic rod in order to prevent the device from being blown down by the typhoon, the torque shaft generates torque, an anti-rotating rodis cut off by shearing force formed between a shearing gear and a torque shell when the torque of the torque shaft is too large, a driving motor is triggered to enable the hydraulic barrel to returnto the original position, and through cooperation of the pressure relief device, when the driving motor is triggered, the pressure in the hydraulic barrel can be released, and the height of the lighting device is reduced, so that the torque value of the torque shaft is reduced, and the effect of resisting typhoon is achieved.

A valve (1) having: a valve body (13) with a centrally located hole (15), an annular groove (27) arranged around the periphery of the hole and a moment arm (25) positioned between the annular groove and the hole ; a rotatable valve shaft (9); a valve disc (17) having a convex outer rim disposed around the periphery of the valve disc; an annular seat (21) having a curved configuration. a first end portion and a second end portion, wherein the first end portion has a concave surface in substantially full contact with the adjacent convex outer edge of the valve body when the valve disc is in the closed position within the bore; annular A seat retainer (23), having an annular groove, also has a moment arm positioned between the annular groove and the hole of the retainer.

The invention relates to a high-slip hydraulic coupler with multiple flow passages, which comprises a shell, a pump pulley fixedly connected with the shell and a worm wheel arranged corresponding to the pump pulley, wherein the shell is provided with an input belt pulley; the worm wheel is fixedly connected with an output shaft; the input belt wheel, the shell and the pump pulley are connected integrally and are arranged on the output shaft through a bearing. The high-slip hydraulic coupler with the multiple flow passages is characterized in that the inner side of the pump pulley is a sunken hollow cavity which is internally provided with guide vanes; the inner cavity of the worm wheel is also provided with guide vanes; the worm wheel is arranged in the sunken hollow cavity of the pump wheel; the guide vanes of the inner sides of the worm wheel and the pump pulley are arranged correspondingly; a guide ring is arranged between the pump pulley and the worm wheel; the guide vanes are arranged at intervals to form the flow passages; the inner side ends of the flow passage spaces are provided with flow baffle plates transversely or are not provided with the flow baffle plates; the flow passage on the pump pulley comprises a pump pulley main flow passage, a pump pulley auxiliary flow passage and a pump pulley assistant flow passage; and the flow passage on the worm wheel comprises a worm wheel main flow passage and a worm wheel auxiliary flow passage. The high-slip hydraulic coupler with the multiple flow passages can be adaptive to continuous use time of a cable of a cable drum, so that the problems of high frequency and high speed of the cable drum are solved; and the high-slip hydraulic coupler with the multiple flow passages is adjustable in torque and wide in application.

The invention relates to a spindle structure with torsion regulation, and the spindle provided by the invention is provided with a female shaft, wherein the female shaft is composed of a plurality of sheets which are connected in parallel, each sheet is provided with a base, one side of each base is provided with a beam barrel part, each beam barrel part is provided with a beam barrel piece which is formed by extending one end of each base towards the other end of each base, and the tail end of each beam barrel piece and each base form a notch; and when the plurality of sheets are parallelly connected into the female shaft, the notches of the plurality of sheets are positioned on the different sides of the female shaft, a male shaft and the beam barrel part rotate internally, the torsion value of one part of the sheets is increased, the torsion value of the other part of sheets is reduced, so that a manufacturer can easily collocate and design the required torsion value female shaft according with the torsion value required when the male shaft is subjected to positive rotation and reverse rotation.