115results about How to "Increase the effective working area" patented technology

The invention relates to a magneto-rheological damper, in particular to a multistage extrusion-type magneto-rheological damper. The multistage extrusion-type magneto-rheological damper is suitable for the vibration isolation of an engine or other equipment. The damper comprises an upper end cover, an outer cylinder body, a piston rod, a sealing ring, a sealing bolt, a working cavity, a lower end cover and a piston head, and is characterized in that the damper also comprises a magnetic-isolation sleeve, a coil, an upper spacing spring, an auxiliary piston head, an inner cylinder body and a lower spacing spring, wherein the working cavity is divided into an inner working cavity and an outer working cavity by the inner cylinder body; the working cavity is filled with magneto-rheological liquid; the auxiliary piston head and the piston head connected to the piston rod respectively extrude the magneto-rheological liquid back and forth in the two working cavities to generate radial flowing so as to generate damping force; and the coil is arranged between the outer cylinder body and the magnetic-isolation sleeve to provide a magnetic field so as to regulate the magnitude of the damping force in real time. The output force of the multistage extrusion-type magneto-rheological damper is much more than that of a common magneto-rheological damper, and especially, the impact generated when the equipment is greatly and intensively vibrated under the severe environment can be avoided. The multistage extrusion-type magneto-rheological damper has the advantages of reasonability in design, simple construction, high efficiency, high response speed, high working reliability, good vibration damping effect and long service life.

The invention provides a built-in metal vibrator vibration and noise reduction dynamic vibration absorber structure of a steel rail. The structure is arranged on the two sides of a steel rail web between two adjacent fasteners and comprises coating body protecting layers, elastic damping bodies and metal mass bodies. Each elastic damping body is tightly attached and fixed to the steel rail and comprises a first elastic damping body and a second elastic damping body which are stacked and fixed into a whole, wherein the hardness of each first elastic damping body is larger than that of each second elastic damping body. Each metal mass body is made of multiple wriggling wavy metal plates which are nested in the corresponding elastic damping body at intervals. Each coating body protecting layer covers the exposed face of the corresponding elastic damping body. By the adoption of the structure, on the premise that the requirement for the sufficient strength of a damping material is met, thedamping effective working area is increased in a wriggling mode, the vibration transmission attenuation rate is increased, the damping material has two different degrees of hardness so as to meet thevibration reduction requirements in different frequency ranges, rail traffic operation noise can be effectively reduced from the position of a noise source, and utilization of the structure does notaffect maintenance of rail traffic original infrastructures and rails.

A design method of a wireless power transmission device includes: step A, under the condition that a receiving device and a transmitting device are aligned completely, measuring intrinsic electric parameters of each coil of the wireless power transmission device and measuring mutual inductance of each two coils to record as a coupled matrix M0; step B, under the condition that the receiving device deflects to a maximum designed deflection value relative to the transmitting device, remeasuring the intrinsic electric parameters of each coil of the wireless power transmission device and remeasuring mutual inductance of each two coils to record as a coupled matrix M1; step C, under the condition that the receiving device and the transmitting device are aligned completely, setting up a nonlinear programming optimization model by taking a maximum efficiency and an assigned power as objective functions, and working out an optimal capacitance value Copt0 of a resonance compensation capacitor by iteration; step D, in consideration of influences of deflection of relative positions of the receiving device and the transmitting device, optimizing the target functions to set up a new nonlinear programming model, and solving the optimization problem by taking the Copt0 as an initial value for iteration to obtain a final capacitance value Copt1 of the resonance compensation capacitor.

The invention relates to a structure and a method for improving the current crowding effect of a microwave power transistor emitter region. The structure is characterized in that the emitter region isprovided with a polysilicon thin-layer distribution resistor which is parallel to the surface of a silicon substrate and an emitter junction for balancing a distribution resistor of a base region below the emitter region and improving the voltage consistency of the emitter junction so as to improve the current crowding effect of the emitter region; and the thin-layer distribution resistor of theemitter region is made of doped polysilicon and acquires a resistor value of the needed doped polysilicon resistor by controlling the thickness and the side undercutting depth of silicon dioxide forming a window of the emitter region. The invention has the advantages that the polysilicon thin-layer distribution resistor parallel to the surface of the silicon substrate and the emitter junction is led in the emitter region; and when a current of the emitter region flows by the distributed resistor, a generated voltage drop compensates the voltage drop of a base current on an inner base resistor,reduces the voltage drop differences of the emitter junction in different positions, improves the current crowding effect, expands the effective working area of the emitter junction and improves themicrowave output power of a chip unit area.

The invention belongs to support structures, in particular to a folding support plate. The folding support plate comprises a piston which is connected with a vehicle, two or more pull rod sliding bases are arranged on the side wall of the piston and can be slid up and down along the side wall of the piston, the pull rod sliding bases are hinged with pull rods, a base is arranged below the piston, a ball head of the piston is fixedly connected on the top surface of the base, slopes are arranged on the positions which are corresponding to the pull rods and arranged on the side wall of the base, lugs are arranged on the side wall below the slopes, folded plates are fixed on the lugs through rotary shafts and hinged with the pull rods through lower shafts, and the folded plates can be rotated by taking the rotary shafts as the shafts under the action of the pull rods. The folding support plate has the effects that: 1. the effective working area of the support plate can be increased through the folding mode, thereby allowing the vehicle to carry the larger support plate under the situation of not increasing the additional space, having no need of carrying a bulky stow wood and saving manpower and material resources; and 2. the support plate can realize the automatic one-time leveling of the ground slope by relying on the sliding bases.

The invention discloses a high total pressure large-flow wheel disk side beveling type back-ward impeller fan, belonging to the technical field of fans. The fan is characterized by being composed of an angle iron flange, a wind scooper, an air intake barrel, a rotor cap, an impeller, the outer barrel of an air outlet barrel, the inner barrel of the air outlet barrel, a guide vane, a motor, a bracket and the like, wherein the inlet of the fan is provided with the wind scooper and extends into the inlet part of the impeller; the hub of the impeller is additionally provided with the rotor cap; the outlet of the impeller, i.e. the edge of the wheel disk, adopts a bevelling structure, and the impeller vane has two types of linear type and circular arc type; the joint assembly point of the air intake barrel and the air outlet barrel of the impeller, i.e. the wheel cover side of the impeller outlet, is provided with the baffle; the isopachous guide vane is welded between the inner barrel of the air outlet barrel and the outer barrel of the air outlet barrel; the side of the inner barrel and outer barrel of the air outlet barrel, which is near the wheel disk of the impeller, is opened; and the air outlet of the fan is divided into a main runner air outlet and a motor cooling flow air outlet. The invention not only satisfies the requirements of high total pressure and large flow operation of the cooling fan but also improves the air flowing situation in the fan to lower flowing loss and noise.

The special gamma spectrograph for moon exploration is provided with crystal scintillator connected to photomultiplier tube and data acquisition circuit successively and features that there are main detector and anticoincidence detector with scintillator connected to one other photomultiplier tube and that the photomultiplier tube of both the main detector and the anticoincidence detector are connected to the data acquisition circuit simultaneously. The data acquisition circuit has microprocessor. The novel gamma ray detection instrument has high sensitivity, low cost, optimal background radiation inhibiting effect and increased detector effective area. The optimal scheme has CsI (Ti) crystal in anticoincidence detector and crystal scintillator of several crystals adhered together.

The invention belongs to the fields of new energy and power generation, and relates to an overhanging type rotating generator based on piezoelectric cantilever mutual excitation. A left end cover and a right end cover are arranged at two ends of a casing provided with a balancing weight, first piezoelectric vibrators are connected between the left end cover, the right end cover and the casing, wherein bearings are embedded in the left end cover and the right end cover in a pressing mode, a rotating shaft provided with a web and a wheel edge is arranged on the left end cover and the right end cover through the bearings, and second piezoelectric vibrators are fixed on two sides of the wheel edge, the end portion of each first piezoelectric vibrator and the end portion of each second piezoelectric vibrator are respectively provided with a magnet, an inner ring of an electric brush and an outer ring of the electric brush are fixed on the rotating shaft and the right end cover respectively, the first piezoelectric vibrators and the second piezoelectric vibrators are connected with the outer ring of the electric brush and the inner ring of the electric brush through a first wire set and a second wire set, and the inner ring of the electric brush is connected with a binding post on a connection disc through a third wire set. The overhanging type rotating generator based on piezoelectric cantilever mutual excitation has the advantages that the generator does not need to be externally supported and fixed, the formed generator is an independent part, a rotating body structure does not need to be changed, and the generator is convenient to install and maintain, high in reliability and strong in power generating capacity and rotating speed adaptability.

The invention relates to a blueberry picking and sorting apparatus and a working method, and belongs to the technical field of planting machinery and equipment. The blueberry picking and sorting apparatus and the working method are in particular applicable to picking and preliminary sorting of dwarf blueberries in mountains. The apparatus includes a bottom frame and a machine frame arranged on thebottom frame. The machine frame is equipped with a picking device and a sorting device. The picking device is used for picking fruits. A collection bin is arranged on the bottom frame. The picked fruits are placed in the collection bin, and then sent to the sorting device by a conveyor belt for multi-level sorting. With the apparatus of the invention, the efficiency of blueberry picking operationcan be improved, the artificial labor intensity can be reduced, and multiple damage to blueberry vines can be reduced.

The invention discloses an electric dry oven for a Chinese herbal medicine. The electric dry oven comprises a box body, a door and a temperature controller, wherein a hot air chamber consisting of heat insulation plates and an insulation plate is arranged in the middle in the box body; an air blower is arranged on the top of the hot air chamber; air outlets are uniformly formed on the heat insulation plates on the left side and the right side of the hot air chamber; and the insulation plate is provided with a plurality of electrothermal tubes from top to bottom. By the electric dry oven, the shortcomings of one-directional heat cycle, non-uniform heating range and non-uniform drying degree in the prior art are overcome; and the electric dry oven has the characteristics of low energy consumption, low cost, high efficiency and convenience for maintenance and regulation.

The invention relates to a sensor, in particular to a subcutaneous tissue interventional type needle glucose sensor and its preparation method. The sensor comprises a base, the bottom of the base is provided with a working electrode, a counter electrode and a reference electrode, and the working electrode, the counter electrode and the reference electrode form a split needle three-electrode system. The subcutaneous tissue interventional type needle glucose sensor and its preparation method have the advantages that the structure is compact, operating performance is improved and the service life is prolonged.

The invention provides a single-control vehicle brake device. The single-control vehicle brake device comprises a clutch hydraulic working cylinder, a brake hydraulic working cylinder, an integrated master pump and a single-control pedal, wherein the integrated master pump comprises a first oil cylinder and a second oil cylinder; the single-control pedal is connected with the integrated master pump; the second oil cylinder is connected with the clutch hydraulic working cylinder through a clutch oil circuit; the first oil cylinder is connected with the brake hydraulic working cylinder through a brake oil circuit; the first oil cylinder is equipped with an oil cup; the brake oil circuit is equipped with a control system for controlling on/off of the brake oil circuit; and the control systemis equipped with a control oil circuit. By utilizing the technical proposal, a brake pedal and a clutch pedal in the prior art can be integrated into a whole, namely the single-control pedal, and thesingle-control pedal and an integrated master cylinder work together to achieve the purposes of brake and clutch, thus misoperation can be effectively avoided and driving safety of a vehicle can be improved in the mode of separating the single-control pedal from a fuel pedal; and the single-control vehicle brake device is only provided with two pedals, thus being simple in operation.

The invention discloses a transparent Ga2O3 p-i-n heterostructure solar-blind ultraviolet light detector and a preparation method thereof. A Ga2O3 film is prepared, the structure of the solar-blind ultraviolet light detector is designed, and the detector is formed by stacking and assembling a substrate, a p-type NiO film, an i-layer Ga2O3 film, an n-type boron and gallium co-doped zinc oxide (BGZO) film and an Au electrode. Compared with a commercially used photomultiplier, the detector provided by the invention is simple in structure, excellent in performance, safe, non-toxic and suitable forlarge-scale solar-blind ultraviolet light detectors. Meanwhile, the width of a depletion region is expanded due to the design of the p-i-n type structure, the effective working region of photoelectric conversion is enlarged, and the response speed of the device is increased.

The invention discloses an impeller, a draught fan and a motor; the impeller (100) comprises a roughly-conical hub (11) and multiple blades (12) which are arranged on the outer circumference of the hub (11) at intervals in the circumferential direction; each blade comprises a front edge face on the inlet end and a rear edge face on the outlet end, the blades are flat plate twisted blades, and the blade front edge segments and the blade rear edge segments incline in a rotary twisted manner in the opposite directions in the circumferential direction; according to the impeller, the shape of the blades is optimized and designed, particularly, due to the fact that the blade front edge segments and the blade rear edge segments incline in the rotary twisted manner, convex faces and concave faces are formed on the same side faces of the blade front edge segments and the blade rear edge segments, fluid losses of the inlet ends and the outlet ends of the blades can be effectively reduced, the effective work range of the impeller is widened, and the work performance of the impeller is greatly improved.

The invention discloses a magnetorheological mud damper. The magnetorheological mud damper consists of a barrel-shaped cylinder body with a sealing cover, a piston located in the cylinder body and an iron core embedded in the piston and mutually accorded with the piston. The cylinder body is filled with magnetorheological mud. Magnet exciting coil is wound on the iron core. A through hole structure I penetrating through the iron core is arranged in the position, in the vertical direction of magnetic field generated by the iron core and the magnet exciting coil, of the iron core. The through hole structure I communicates with a through hole structure II of the piston to form a magnetorheological mud channel. The two sides of the piston are symmetrically provided with pulling rods. The pulling rods extend out of the cylinder body, and the connection position of the pulling rods and the sealing cover of the cylinder body is sealed. The magnet exciting coil on the iron core is connected with an outside power source through hole ducts in the pulling rods. According to the magnetorheological mud damper, the magnetorheological mud channel is located in the piston, the adjusting and controlling effect is good, the iron core can be replaced, the mechanical property of the damper can be adjusted, the iron core is not directly forced, the durability is good, the shear yield strength of the magnetorheological mud is high, and the precipitation-resistance performance is good.

The invention relates to the technical field of heat pump units, in particular to a heat pump unit and a gas-liquid two-phase uniform distribution method. The heat pump unit comprises a compressor, an oil separator communicating with the compressor, a condenser communicating with the oil separator, and a parallel two-phase flow distribution type evaporator communicating with the compressor; a first ball valve, a drying filter, an electronic expansion valve and a second ball valve are sequentially arranged between the condenser and the parallel two-phase flow distribution type evaporator to form a first loop; an oil return angular ball valve and an oil return filter are sequentially arranged between the oil separator and the compressor to form a second loop; an oil return electromagnetic valve, a jet pump and a compressor input end ball valve are sequentially arranged between the parallel two-phase flow distribution type evaporator and the compressor; and the jet pump communicates with the condenser to form a third loop. The heat pump unit has the beneficial effect that uniform distribution of expansion valve throttling gas-liquid two-phase refrigerants can be achieved.

The invention provides a flexible sensor. According to the flexible sensor provided by the invention, insulating reinforcing layers are added to the two sides of a flexible substrate layer, and the thicknesses of the substrate layer and the insulating reinforcing layers are accurately controlled, so that the flexible substrate with more excellent performance is prepared, and the flexible substrate can remarkably improve the adhesive force to a conductive layer/electrocatalytic layer, is soft in texture and rich in toughness, improves the overall bending resistance, and is more suitable for preparing the flexible sensor partially implanted into a human body. The flexible base material can be made into a single-piece double-sided flexible electrode, photoetching or screen printing and other technologies are not needed, layer-by-layer assembly insulation treatment is not needed, multi-piece splicing is not needed, compared with a single-piece single-face multi-electrode, the effective working area is larger, the service life of the sensor is prolonged, long-term implantation and use are facilitated, the processing technology can be effectively simplified, the production cost can be reduced, meanwhile, the implantation wound can be effectively reduced through the single-chip electrode structure, and the further prepared flexible sensor is more stable in detection result, small in batch-to-batch difference and high in sensitivity.