34results about How to "Change pitch" patented technology

The present invention discloses a controllable-pitch propeller hub test device and belongs to the marine machinery field. The device comprises a connecting flange, a connecting oil pipe, a control oil cylinder and a plurality of flange plates; the plurality of flange plates are suitable for being mounted on a hub to be tested so as to be used for simulating blade pitch varying; the connecting flange is suitable for being mounted on an end surface of the hub to be tested and is provided with an oil transportation cavity with an oil transportation opening, wherein the oil transportation cavity is suitable for being communicated with the reverse oil cavity of a pitch varying oil cylinder; one end of the connecting oil pipe is suitable for being connected with and communicated with an oil transportation pipe in the hub to be tested; the control oil cylinder is mounted on the oil transportation cavity; the other end of the connecting oil pipe is connected with the piston of the control oil cylinder; one end of a piston rod is fixedly connected with the piston, and the other end of the piston rod extends out from the control oil cylinder; and a transportation oil channel communicated with the connecting oil pipe is arranged in the piston rod. With the controllable-pitch propeller hub test device of the invention adopted, simulation testing can be performed on an assembled integrated product, so that it can be ensure that the performance index of the product can meet design requirements and use requirements.

The invention discloses a photosensitive dopant, a preparation method thereof, a self-assembly system and a photoresponse device. The chemical structure of molecules of the photosensitive dopant is characterized in that 3,5-bi-(4-hydroxyphenylazo) benzoic acid is adopted as a base framework, a carboxyl terminal is connected with a chirality group, and a hydroxyl terminal is connected with a flexible chain. Under stimulation of external light, a photosensitive group- di-azobenzene with high ultraviolet absorption capability can achieve quick response and can be isomerized, quick isomerization of the chirality group in the structure and even the entire molecules is further induced, and the deformation index of the molecules is higher and quicker. In the self-assembly system of the molecules, rearrangement of the molecules in the system can be triggered more obviously, and physicochemical characteristics, like optimal and electrical characteristics, of the system are regulated.

The invention provides a C3 polypeptide supramolecular helical polymer and a preparation method thereof. The polypeptide supramolecular helical polymer is prepared through the following steps: a monomer molecule is prepared through the amidation of the pentafluorophenol active ester of trimesic acid and dipeptide modified by an alkyl chain; then the monomer molecule self-assembles into the supramolecular helical polymer in a solution; the chirality of the supramolecular helical polymer can be changed by changing the sequence of amino acid; and the screw pitch of the supramolecular helical polymer can be adjusted by changing the size of the chirality of the amino acid. The supramolecular helical polymer is simple to prepare, a chiral resource (amino acid) adopted is obtained through natural proteolysis and is not synthesized artificially, the chirality is reliable, the price is cheap, the supramolecular helical polymer can be applied to the field of chiral recognition, chiral separation and the like, and the invention provides a new method for preparing novel chiral materials.

The invention relates to a device for spiral superfinishing of a raceway of a bearing inner race. According to the device for the spiral superfinishing of the raceway of the bearing inner race, the output end of an oscillating shaft of a spatial connecting rod vibration oscillator is fixedly connected with a spline housing, a spline shaft which is matched with the spline housing is movably connected in the spline housing, the front end of the spline shaft is fixedly connected with an oilstone swinging head, the oilstone swinging head is connected with the spline housing through a tension spring, a push rod is arranged in the oscillating shaft in a penetrating mode, the front end of the push rod penetrates out of the front end of the oscillating shaft to be in contact connection with the spline shaft, and the rear end of the push rod penetrates out of the rear end of the oscillating shaft to be connected with a pushing device with the stroke and speed adjustable. According to the device for the spiral superfinishing of the raceway of the bearing inner race, the lead angle and screw pitch of spiral motion can be changed by adjusting the oscillating angle of the oscillating shaft and the eccentricity of an eccentric cam or the movement amount of the electric push rod; the speed and oscillating frequency of the spiral motion can be changed by adjusting the rotating speed of a driving device of a speed regulating motor of the spatial connecting rod vibration oscillator and a speed regulating motor of the pushing device with the stroke and speed adjustable or the pushing speed of the electric push rod, superfinishing surface roughness of raceways of different bearing inner races is improved, and waviness is reduced.

The invention discloses a composition, a color film basal plate, a display panel, a display device and a production method of the color film basal plate. The composition disclosed by the invention comprises the following components in parts by weight: 30-65 parts of a nematic liquid crystal, 6-35 parts of a chiral additive, 5-34 parts of a photopolymerization monomer and 0.01-0.1 part of a photoinitiator. The production method of the color film basal plate, disclosed by the invention, comprises the following steps of forming a composition layer, forming a filter region and performing ultra-violet curing. The invention further discloses the color film basal plate produced by the production method disclosed by the invention, the display panel comprising the color film basal plate, and the display device comprising the display panel.

The invention relates to a threaded column cement piling machine. The threaded column cement piling machine comprises a slip casting machine, a flow guide pipe, a lifting support, a driving machine and a driving rod; a thread cutting device is arranged on the driving rod and comprises an adjusting ring, and the adjusting ring is meshed and connected with the driving rod through a reduction gear set; a thread cutting rod is arranged on an outer annular face of the adjusting ring, a driving gear is arranged at the end, connected with the adjusting ring, of the thread cutting rod, and the threadcutting rod can be driven by the driving gear to freely rotate around the axis of the thread cutting rod relative to the adjusting ring; driving lines are further arranged on the driving rod and are meshed and connected with the driving gear through a transmission wheel; and a rotating shaft of the transmission wheel is connected to the adjusting ring through a connecting rod. The cement piling machine is novel in structure and convenient and quick to operate, the pile bearing capacity can be greatly improved, the foundation firmness is strengthened, pile forming raw materials are reduced, andthe building cost is reduced.

The invention discloses a driving device for domesticated sheep. The device comprises an external supporting mechanism used for external throwing out, an airflow whistle blowing mechanism used for airflow flowing whistle blowing, a magnetic whistle blowing mechanism used for changing whistle sounds through magnetic movement and an electrostatic generation mechanism used for electrostatic generation. A shell is mounted in the external supporting mechanism, the airflow whistle blowing mechanism is arranged in the external supporting mechanism through the arranged shell, the outer wall of the airflow whistle blowing mechanism is fixedly connected with the electrostatic generation mechanism, and the magnetic whistle blowing mechanism is arranged at the end, away from the airflow whistle blowing mechanism, of the inner wall of the shell. Through the arrangement of a spiral telescopic rod, the shell can be suddenly thrown out, when the shell is closer to the sheep, a strong frightening effect is achieved, sheep driving is ensured, an arc-shaped rod moves on an arc-shaped rolling wheel, a first blocking plate can stretch out and draw back, the made sound is changed, the sheep is preventedfrom having the habit to sound, and sheep driving is ensured.

The invention discloses a mount telephone and method for downloading bell or music from internet. The invention includes a primary control unit, a MIDI chip, a memory unit, a voicing device, an interface unit, a dialing unit, a hanger, bell measuring unit, a communication control unit, a system state indicating lamp. The invention can download music and bell form the internet to mount telephone device through the editing and playing function of MIDI chip to music data. The invention also discloses the method.

The invention discloses a foldable variable-pitch propeller for a fixed-wing unmanned aerial vehicle, and relates to the technical field of unmanned aerial vehicles. The foldable variable-pitch propeller comprises a shell, a cavity is formed in the shell, bearings are embedded in the two sides of the shell, the bearings are symmetrically distributed relative to the shell, and the bearings are parallel to each other; propeller clamps are installed on the two sides of the shell in a matched mode, and the two sets of propeller clamps are coaxial; the two ends, close to each other, of the two setsof propeller clamps penetrate through the bearing and extend into the cavity, and clamping grooves are formed in the two ends, away from each other, of the two sets of propeller clamps in the axial direction; and blades are hinged into the clamping grooves in a matched mode. The foldable variable-pitch propeller is novel in structure and simple and reliable in structure, and the problem that thefixed-pitch blades have adverse effects on the flight performance of the fixed-wing unmanned aerial vehicle is effectively solved.

The invention relates to a photoisomeric chiral molecule and application thereof in realizing patterning of a color liquid crystal film, and relates to the technical field of liquid crystal films. The preparation method of the photoisomeric liquid crystal film comprises the following steps: heating a liquid crystal monomer and a chiral dopant in a solvent under the action of a photoinitiator to react completely, coating the surface of the film with the reaction product, drying the film, and illuminating the film to obtain the photoisomeric liquid crystal film, the chiral dopant is a photoisomerization chiral molecule. The preparation method of the photoisomerization liquid crystal film is simple, convenient to operate and low in raw material consumption, and the prepared photoisomerization liquid crystal film is stable in performance.

The invention provides a method of shutting down a wind turbine, the wind turbine comprising: a rotor having a plurality of blades; and a generator system coupled to the rotor. The method comprises: operating the generator system to generate electrical power 5 and applying a load torque to the rotor; using the power reference signal to control the generated electric power; determining that the wind turbine needs to be shut down; in response to determining that the wind turbine needs to be shut down, varying the power reference signal to increase the generated electrical power, thereby slowing down the rotor; determining that the rate of the rotor has decreased by 10 to below a threshold; and in response to determining that the rate of the rotor has dropped below the threshold, changing the pitch of the blades to further slow down the rotor.

The embodiment of the invention provides a liquid crystal writing board, a control method thereof and a writing system. According to the liquid crystal writing board provided by the embodiment of the invention, the adjusting material is arranged on the liquid crystal layer, and the adjusting material can change the screw pitch of the bistable liquid crystal under the first excitation condition so as to change the wavelength range of visible light reflected by the bistable liquid crystal in the plane texture state, so that the color of handwriting displayed by the liquid crystal writing board can be changed; the liquid crystal writing board can display handwriting of different colors, diversified use requirements of users can be met, and the use experience of the users is guaranteed.

The invention relates to a cutting-shaped unmanned aerial vehicle frame with a stable arm, one end of the upper swing arm and the lower swing arm is rotatably connected to the fuselage, and the other end of the upper swing arm and the lower swing arm is rotatably connected to the motor frame; The middle part of the upper swing arm is provided with a strip-shaped swing groove A, and the middle part of the lower swing arm is provided with a strip-shaped swing groove B. An elastic pull rod is connected between the upper swing arm and the lower swing arm, and one end of the elastic pull rod is fixed to the The front end of the swing slot A and the other end of the elastic pull rod are fixed to the rear end of the swing slot B; a set of transmission swing arms are rotatably connected to the top of the motor frame, and the transmission swing arms include a swing arm shell and a transmission assembly arranged in the swing arm shell , the power input wheel and the power output wheel are connected by a belt drive; a cantilever is also connected to the swing arm shell, a feedback motor is arranged in the middle of the fuselage, a feedback wheel is fixed on the output shaft of the feedback motor, and a ring is formed on the feedback wheel. The array is provided with several feedback swing arms, and a push rod is connected between the feedback swing arms and the cantilever.

The invention discloses an elevator speed limiter. The elevator speed limiter comprises a mounting bottom plate and racks, wherein a rope sheave shaft is arranged on the racks; a brake wheel is arranged on the rope heave shaft; one side of the brake wheel is provided with a circular truncated cone; a rope sheave sleeves the circular truncated cone; the rope sheave and the brake wheel are arranged in a split mode; friction plates for extruding the rope sheave are further arranged on the side surface, corresponding to the rope sheave, of the circular truncated cone; the two friction plates are respectively positioned at the two sides of the rope sheave; the end part of the circular truncated cone is provided with outer threads; a nut matched with the outer threads is further arranged on the circular truncated cone; an extrusion spring and a brake plate are further arranged on the circular truncated cone; the brake plate clings to the friction plate close to one side of the nut; and the extrusion spring is positioned between the nut and the brake plate. While operating at an overspeed, the rope sheave does not stop motion immediately, but speeds down to slowly rotate, so that a steel wire rope is always kept to synchronously move with the rope sheave, and the steel wire rope and the rope sheave do not have sliding friction, and therefore, the steel wire rope is prevented from being worn severely.

The invention discloses a new energy vehicle battery spring processing production line, and belongs to the technical field of new energy automobiles, the new energy automobile battery spring processing production line comprises a conveying device used for conveying a spring wire, and a cutting device, a winding device and a clamping device which are sequentially arranged in the conveying direction of the conveying device, and the clamping device is used for clamping the outer end of the spring wire; the winding device is used for winding a spring wire, the clamping device can rotate along with the spring wire after clamping again, and the cutting device is used for cutting the spring wire; and the winding device comprises a winding rod, a rotating mounting seat, a rotating disc, a rotating driving device, an eccentric driving device and a displacement driving device. The production line can be used for conveniently processing and manufacturing the battery spring, the processing efficiency is improved, and the cost is saved.

The invention discloses an underwater oil-filled towing cable drag adjustment device, which belongs to the technical field of underwater drag detection. The device includes tension gauge, electric slip ring, control cabin, buoyancy regulator, propeller and damping umbrella; Installed inside the damping umbrella; the oil-filled towline is connected to the interior of the control cabin through the tension gauge and electric slip ring; the propeller and the damping umbrella respectively generate thrust and resistance to act on the oil-filled towline and pull the oil-filled towline to unfold; adjust the buoyancy The regulator changes the pitch of the control cabin. When the head is bowed, the oil-filled towline is pulled up, and when the head is raised, the oil-filled towline is dragged to sink, so that it has the ability to adjust the depth of the underwater oil-filled towline. The invention has the function of automatically adjusting the depth of the towline, adopts the hybrid power of the sea current resistance and the propeller, the traction towline can be normally deployed and heaved, and has the ability to provide towing force for the towline for a long time and in a wide water depth.

The invention discloses a no-tillage fertilization, sowing and film mulching device for ginger. The no-tillage fertilization, sowing and film mulching device comprises a chassis, the chassis comprisesa gear cavity and a fertilization transmission cavity, a fertilization mechanism is contained in the fertilization transmission cavity, a supporting seat is fixedly arranged on the right side of theupper end of the chassis, a ginger barrel is fixedly arranged at the upper end of the supporting seat, and the ginger barrel comprises a sowing cavity. The no-tillage fertilization, sowing and film mulching device is simple in structure and easy and convenient to operate, the processes of ditching, fertilization, sowing, earthing, film mulching and soil pressing can be automatically completed onlyby putting fertilizer and germinated ginger strips into a fertilizer barrel and the ginger barrel respectively and dragging the no-tillage fertilization, sowing and film mulching device through a tractor, and the putting distance between the fertilizer and the germinated ginger strips can further be changed by adjusting the gear position of a gearbox; and the no-tillage fertilization, sowing andfilm mulching device has the high integration degree, the large-scale ginger planting efficiency can be greatly improved, and the labor cost is reduced.

The present invention discloses a controllable-pitch propeller hub test device and belongs to the marine machinery field. The device comprises a connecting flange, a connecting oil pipe, a control oil cylinder and a plurality of flange plates; the plurality of flange plates are suitable for being mounted on a hub to be tested so as to be used for simulating blade pitch varying; the connecting flange is suitable for being mounted on an end surface of the hub to be tested and is provided with an oil transportation cavity with an oil transportation opening, wherein the oil transportation cavity is suitable for being communicated with the reverse oil cavity of a pitch varying oil cylinder; one end of the connecting oil pipe is suitable for being connected with and communicated with an oil transportation pipe in the hub to be tested; the control oil cylinder is mounted on the oil transportation cavity; the other end of the connecting oil pipe is connected with the piston of the control oil cylinder; one end of a piston rod is fixedly connected with the piston, and the other end of the piston rod extends out from the control oil cylinder; and a transportation oil channel communicated with the connecting oil pipe is arranged in the piston rod. With the controllable-pitch propeller hub test device of the invention adopted, simulation testing can be performed on an assembled integrated product, so that it can be ensure that the performance index of the product can meet design requirements and use requirements.

The invention discloses a kind of fixed telephone device which can uploads music or bell. It includes: a primary control unit, a voice interface unit, a voicing device, the device further includes a wireless interface unit; it can receive the wireless signal from the mobile communication terminals according to the interface protocol and carries on modulation conversion; a memory unit which can carry on data access under control of primary controller; a MIDI chip, which can reads music data from the memory unit under control of the primary controller and edit the data, the edited data are transmitted to the voicing device to be played; by using the device, the user can receive the music file transmitted from the mobile communication terminal of wireless interface, and uses it as the call music of fixed telephone; the invention also discloses the method.

The invention discloses a signal auxiliary enhancement device for an information system, which comprises a protective shell, a small helical antenna and a large helical antenna, one side of the protective shell is connected with a support plate, a turntable assembly is mounted at the center of the support plate, a telescopic sleeve is mounted in the protective shell, and the telescopic sleeve is sleeved with the large helical antenna. The telescopic sleeve is internally connected with a telescopic rod, the end part of the telescopic rod is provided with a small helical antenna connecting plate, and the telescopic rod is sleeved with a small helical antenna; the small helical antenna and the large helical antenna have the capability of receiving two groups of electromagnetic waves, so that the screw pitches of the small helical antenna and the large helical antenna can be changed when the telescopic rod and the telescopic sleeve are retracted, and the helical antennas have the capability of receiving multiple electromagnetic waves during miniaturization design; and the signal auxiliary enhancement equipment can be adjusted to a proper electromagnetic wave receiving elevation angle.

The utility model relates to an adjustable flow channel pitch hydrocyclone. The main purpose is to solve the problem that a single type of cyclone has poor separation effect in different working conditions. It is characterized in that: a variable-pitch spiral flow channel module and an adjustable inverted cone module are built in the variable-diameter separation tube; there are 4 rows of annular gap grooves at the bottom of the variable-diameter separation tube, and there are 3 gap grooves in each row with mutual angles Distributed on the inner surface in a 120° circle; the variable-pitch spiral flow channel module includes an inner drive screw column, an outer cylinder, a limit slider, a slider nail, a trapezoidal belt, a coding knob, a square seal ring, and a sealing cover. The slider and the slider nail link the inner drive screw column and the outer cylinder together, and the limit slider and the slider nail slide left and right in the groove of the outer cylinder by rotating the inner drive screw column, and the limit slider drives the trapezoidal belt to move; The adjustable inverted cone module includes a variable-diameter inverted cone, a ring knob, a connecting rod, a telescopic clamping column and a connecting pin, and the telescopic clamping column is adjusted by rotating the circular ring knob.

The invention provides a preparation method of a nano cellulose composite film capable of responding to humidity and an obtained product. The preparation method comprises the following steps: (1) preparing nanocellulose crystals and water into a suspension according to a ratio of 1: (50-80), mixing the suspension with 1, 3-butanediol BG according to a ratio of 1: (8-12), uniformly stirring the mixed suspension, and performing ultrasonic treatment; and (2) putting the suspension treated in the step (1) into a drying container, and naturally standing, evaporating and drying at the temperature of 20-30 DEG C and the humidity of 30-40%. According to the nanocellulose composite film provided by the invention, due to the addition of exogenous additives, the film becomes smoother, the thermal stability is higher, and the film has humidity response performance.

A variable pitch system for a water or wind turbine includes a hydraulic system that includes a first hydraulic system (90) and a second, redundant hydraulic system (92) that are completely contained in a nose region of the turbine. The first and second hydraulic systems (90, 92) can each be used during operation on a predetermined operating schedule. In addition, each of the first and second hydraulic systems (90, 92) can also include a pressure relief valve to limit back pressure on the hydraulic system from dynamic loads on the turbine blades. The pitch of all the blades (34) are changed simultaneously using a common linear to rotary actuating mechanism. To aid in cooling, the hydraulic reservoirs (100) for the first and second hydraulic systems (90, 92) can be attached to the front wall of the nose housing (40), and fins (120) can be provided on the exterior of the nose housing (40) at the front end to enhance heat extraction.