41results 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 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.

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.

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 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.

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 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.