42results about How to "Small pulse" patented technology

The invention discloses a multi-stage vertical high specific speed mixed-flow pump which comprises a suction cone and a drive shaft arranged in the center. The upper end of the suction cone is connected with primary guide vane bodies, the upper end of each primary guide vane body is connected with a secondary guide vane body, a primary vane wheel is arranged between the suction cone and the primary guide vane bodies, and a secondary van wheel is arranged between the primary guide vane bodies and the secondary guide vane bodies; the primary vane wheel and the secondary vane wheel are both arranged on the drive shaft, and middle transition joints are connected between the primary guide vane bodies and the secondary guide vane bodies; the secondary vane wheel is arranged between the middle transition joints and the secondary guide vane bodies; each middle transition joint is provided with a leading-in cavity which is connected with a leading-out cavity, a transition opening is formed between each leading-in cavity and the corresponding leading-out cavity, the inner walls of the leading-in cavities are all provided with transitional flow deflectors, and the two ends of each middle transition joint are provided with connecting flanges. According to the multi-stage vertical high specific speed mixed-flow pump, the lift is high, the flow is large, the efficiency is high, the size is small, the production cost is low, the installation is convenient, and the practical range of the vertical mixed-flow pump is greatly widened.

The invention belongs to the technical field of engine turbochargers, and relates to a shell structure of a turbine shell. The shell structure comprises the turbine shell; an outlet of the turbine shell is in sealed connection with a transition joint, and a transition joint cavity is formed between the transition joint and the turbine shell; a first turbine shell flue-gas bypass channel is formedin the upper part in the turbine shell, the gas inlet end of the first turbine shell flue-gas bypass channel communicates with a first turbine shell gas-inlet flowing channel formed in the bottom of the turbine shell, and the gas outlet end of the first turbine shell flue-gas bypass channel communicates with the transition joint cavity; and the turbine shell is internally provided with a flue-gasbypass valve for controlling opening and closing of the first turbine shell flue-gas bypass channel, and the bottom of the turbine shell is further provided with a second turbine shell gas-inlet flowing channel. According to the shell structure of the turbine shell, by adjusting the structures of the transition joint and the turbine shell, selecting and switching of the two structures are achieved, so that the overall combustion efficiency of an engine is improved, fuel economy is improved accordingly, and meanwhile, the risks of an excessive high supercharging pressure and an excessive high rotating speed of a supercharger are reduced.

The invention discloses a five-cylinder pump and a method for installing helical gears thereof. The five-cylinder pump comprises a framework, a crankshaft, a motor and a pinion shaft; the crankshaft is arranged on the framework, and the pinion shaft is connected with the motor; pinions are arranged at two ends of the pinion shaft; bearings for supporting the crankshaft are arranged on the crankshaft of the five-cylinder pump; the two helical gears are arranged at two ends of the crankshaft, turning directions of teeth of the helical gears are opposite to each other, and the helical gears are connected with the crankshaft by expansion sleeves; stepped holes are formed in the end surfaces of the helical gears, large holes of the stepped holes are expansion sleeve mounting holes, and small holes of the stepped holes are crankshaft mounting positioning holes and are positioned in the inner end surfaces of the helical gears; pressure plates are arranged on the outer end surfaces of the helical gears, are connected with the helical gears by bolts and are abutted to bolts on the outer end surfaces of the expansion sleeves; kidney-shaped holes are formed in the end surfaces of the helical gears, and bolts penetrate the kidney-shaped holes to connect the helical gears with the crankshaft; the helical gears on the crankshaft are in mesh transmission with the pinions. The five-cylinder pump and the method have the advantages that the five-cylinder pump is small in size, long in service life and convenient to disassemble and assemble.

The invention provides a heavy truck cab hydraulic hoisting radial plunger pump, which aims at solving the problems of the existing heavy truck cab hydraulic hosting mechanism in the prior art that the labor intensity is large, the pulse is large, the stability is poor, the speed is slow and the manufacturing cost is high, and the heavy truck cab hydraulic hoisting radial plunger pump comprises a pump body, a stator, a rotor, an oil distribution disc and a reversing valve; plunger units are uniformly arranged in the radial direction of the rotor; the stator and the rotor are eccentrically arranged; the oil distribution disc is arranged on the center of the rotor and provided with an oil inlet passage and an oil outlet passage, and the oil inlet passage and the oil outlet passage are respectively connected with an external pipeline; the reversing valve is arranged on the external pipeline and can switch an oil inlet pipeline and an oil outlet pipe of a cab hoisting oil cylinder; and each plunger unit comprises a plunger and a spring, and the spring is arranged between a bottom hole of the plunger and a root step of the plunger hole. The heavy truck cab hydraulic hoisting radial plunger pump has the beneficial effects that the pulse is small, the stability is high, the speed is high, simplicity in structure is realized, and the manufacturing cost is low.

The invention discloses a vertical anti-freezing self-priming piston pump. The vertical anti-freezing self-priming piston pump comprises a bracket, and an outer bracket positioned at the upper part of the bracket and formed integrally with a synchromesh gear case through casting. A reduction gearbox bearing base, a reduction gearbox cover, a motor bracket and an explosion-proof motor are arranged at the upper part of the synchromesh gear case in sequence. The vertical anti-freezing self-priming piston pump is characterized in that an upper sealing plate is arranged at the upper end of a cavity while a lower sealing plate is arranged at the lower end of the cavity; synchronous pistons are arranged between the upper sealing plate and the lower sealing plate; the two synchronous pistons are engaged with each other and rotate and the outer diameters of the pistons are in interference fit with the cavity; convex edges of upper and lower end surfaces are respectively in interference fit with the upper sealing plate and the lower sealing plate; an upper machine dynamic sealing ring, an upper machine static sealing ring, a lower machine dynamic sealing ring and a lower machine static sealing ring for sealing an auxiliary transmission shaft and a synchronous shaft are arranged at the upper parts and the lower parts of the synchronous pistons; and an electric heating water circulating device is disposed in an explosion-proof box at the upper part of a rear separated chamber of the cavity. The vertical anti-freezing self-priming piston pump has the advantages of small size, compact structure, good sealing performance and strong self-priming capacity, and effectively solves problems in freezing prevention and thermal insulation of a pump body.

The invention discloses a three-dimensional flow efficient energy-saving water pump. The three-dimensional flow efficient energy-saving water pump comprises a water pump body, an impeller body is rotationally connected into the water pump body, a plurality of main blades are fixedly installed on the outer surface of the impeller body, auxiliary blades are fixedly installed among the main blades, and a plurality of channels are formed in the outer surface of the impeller body. The water pump body comprises a data acquisition module, a data statistics module, a data analysis module and a data verification module, the data acquisition module comprises a pump body acquisition unit and a liquid acquisition unit, the pump body acquisition unit is used for acquiring operation information of the water pump body, and the liquid acquisition unit is used for acquiring information of a water sample conveyed by the water pump body. The three-dimensional flow efficient energy-saving water pump is used for solving the technical problem that in an existing scheme, under the condition that a pump shell and other parts are shaped, a single three-dimensional flow impeller cannot change water resistance and water loss of all flow passing parts in the whole water pump, and the running effect of the three-dimensional flow water pump is poor.

This is about a kind of no air spraying machine of saving energy. Air energy motor uses press-deposit direction changing fix to change the direction. The direction changing fix includes two fast valves, self press-deposit pieces and two air ways. The self press-deposit piece is constituted by air store direction changing room, direction changing valve and two self directions changing active valve. The two air ways are connected with two fast valves and direction changing valve, which is between the two direction changing active valves. The two direction changing valves are fixed on the two air entrance and two air exit on the air energy motor. The two direction changing valves control the motor air going in and out by the direction changing valve. The invention spraying machine has the features of little air to use, high press, steady working press, large power and long life, increases and guarantees the quality of spraying.

The invention provides a touch-control sensing system that comprises a touch-control input interface and a capacitance sensing circuit, wherein the touch-control input interface comprises a plurality of sensing capacitors that are used for outputting at least one waveform to be tested and at least one reference waveform; and the capacitance sensing circuit comprises a difference comparing unit that is used for receiving the waveform to be tested and the reference waveform and outputting a difference signal according to at least one positive edge difference and at least one negative edge difference between the waveform to be tested and the reference waveform. Furthermore, the invention also provides a capacitance sensing method.

The invention provides a sliding shoe auxiliary squeezing device of a peristaltic pump. The sliding shoe auxiliary squeezing device comprises a squeezing sliding block and a driving mechanism used fordriving the squeezing sliding block to slide. The end, far away from the driving mechanism, of the squeezing sliding block is provided with a squeezing mechanism for implementing arc-shaped squeezingon a liquid delivery pipe in the cross-section direction of the liquid delivery pipe. The invention further discloses the peristaltic pump. The peristaltic pump comprises the sliding shoe auxiliary squeezing device of the peristaltic pump. According to the sliding shoe auxiliary squeezing device of the peristaltic pump, the driving mechanism drives the squeezing sliding block to slide, so that the squeezing mechanism on the squeezing sliding block implements arc-shaped squeezing on the liquid delivery pipe in the cross-section direction of the liquid delivery pipe. During arc-shaped squeezing, squeezing force of the squeezing mechanism on the liquid delivery pipe increases gradually and then decreases gradually. The squeezing process has the transitivity. Pulses generated during squeezingare reduced. damage to rigid squeezing on the liquid delivery pipe is avoided. A substance in the liquid delivery pipe is also protected against damage.

The invention provides a network cable pay-off rack for construction. The network cable pay-off rack comprises a pay-off base, a first support plate and a second support plate are connected to the pay-off base side by side, the first support plate and the second support plate are separately and rotatably connected with a pay-off rotating shaft, the pay-off rotating shaft is connected with a plurality of wire blocking discs in a sleeved manner, an equipment box is arranged at one side of the second support plate, a driving motor is arranged in the equipment box, an output end of the driving motor is connected with one end of the pay-off rotating shaft through a coupling, a switch button and a speed regulation button are arranged on the equipment box, and at least four universal wheels are arranged at the bottom of the pay-off base. The network cable pay-off rack can move to the cable take-up and pay-off positions according to actual requirements, take-up and pay-off are driven by the driving motor without manual operation, the problem that tension is unstable in the pay-off process due to the fact that the friction coefficient is changed due to the influence of the speed is solved, the movement in a short distance is very convenient, the rack can be easily moved by one or two persons on the ground, the usage is simple and convenient, and network cables and optical cables won't be twisted, and the twisting phenomenon is avoided.

The invention discloses a heat pipe. The heat pipe comprises an outer pipe body and an inner pipe body, the inner pipe body is arranged in the outer pipe body in a penetrating manner, and a cooling channel allowing outer cooling liquid to pass through is formed; two opposite ends of the inner pipe body extend out of the outer pipe body, and a liquid inlet and a liquid outlet are correspondingly formed; the liquid inlet and the liquid outlet communicate with the cooling channel, a vacuum cavity is formed in the gap between the inner pipe body and the outer pipe body, and a working medium is injected into the vacuum cavity. According to the heat pipe, a liquid absorbing core and a water tank can be omitted, and the safety hidden danger of burst and the like when the heat pipe is applied to aheat exchanger and other devices can be avoided. The invention further discloses the heat exchanger.