31results about How to "Simple structure improvement" patented technology

The invention discloses a ferromagnetic thin-film wave absorbing material with periodic structure, which consists of the medium layers and the ferromagnetic thin-film layers arranged with intervals, the ferromagnetic thin-film layer comprises N element with the mass percentage not more than 10% and the balance of Fe element. The thickness range of the ferromagnetic thin-film layer is from 100nm to 900nm. The thickness range of the medium layer is not more than 10nm. The invention controls the thickness of the thin-film wave absorbing material by changing the periodic number of the medium layer and the ferromagnetic thin-film, simply modifies the structure of the ideal magnetic screen itself, and has easy operation. The wave absorbing material has better wave absorbing properties and good absorbing bandwidth, which can satisfy the requirements of the thin absorbing electromagnetic waves in a plurality of application situations. By adopting the ferromagnetic thin-film wave absorbing material with periodic structure, when the incidence of electromagnetic waves are vertical, the reflection frequency response characteristic curve is basically the same as that before being divided into periodic structure, wherein the size of the reflectivity is reduced with certain degree at the low frequency end compared with that before being divided.

The invention discloses a DC/DC circuit, comprising a PWM controller, a current amplifier, a peak current comparator, an error amplifier, a main switch, a synchronous switch and also an operational amplifier. The non inverting input end of the operational amplifier is used for coupling with input voltage or voltage reference, or used for coupling with the input voltage and the voltage reference; the inverting input end of the operational amplifier is used for coupling with the voltage reference or ground, and the output end thereof is connected with the non inverting input end of the error amplifier. As a DC/DC basic structure is adopted, the operational amplifier leads the non inverting input end voltage of the error amplifier to follow the input voltage linearly, thus realizing the linear following relation between the output voltage and the input voltage. As the DC/DC basic structure is adopted, the circuit provided by the invention has the advantages of DC/DC to guarantee the high efficiency of the output of the voltage and great driving capacity.

The invention provides a full-service-life propeller hub structure. The full-service-life propeller hub structure comprises a propeller hub center piece, a blade spindle, a propeller clamp and blades,wherein the blade spindle is connected with the propeller hub center piece and the propeller clamp, the blades are arranged on the tail end of the propeller clamp, a first bearing, a second bearing and a third bearing are successively arranged on the blade spindle along the tail end of the propeller clamp, the blade spindle is provided with a step surface, and the second bearing and the third bearing are respectively arranged on two sides of the step surface. Two mounting bearings of a helicopter rotary wing propeller hub are used for sharing a centrifugal force of the rotation of the propeller blades, so that the service life of the bearing is greatly prolonged, and the full-service-life use of an unmanned helicopter can be satisfied.

The invention discloses an improved structure of a lifting oil cylinder block one-way valve. The improved structure comprises a cylinder block. An oil cavity is formed in the cylinder block, a cavity opening of the oil cavity is formed in one side of the cylinder block, a valve rod is installed in the oil cavity in a sliding mode, a valve bush is installed on the valve rod, an oil outlet is formed in the top of the cylinder block, a cylinder barrel is installed on the cylinder block, a piston is vertically installed in the cylinder barrel in a sliding mode, a piston rod is installed in the piston, a buffer valve bush is installed in the piston rod, a buffer plunger is arranged in the buffer valve bush, the bottom end of the buffer plunger stretches into the oil outlet of the cylinder block, a valve port communicated with the oil cavity is vertically formed in the top, on one side of the oil outlet, of the cylinder block, a plug is installed on the top of the valve port, a vertical through cavity is formed in the plug, a steel ball is movably arranged at the joint of the valve port and the oil cavity, and the steel ball can plug the joint of the valve port and the oil cavity and the through cavity of the plug due to fact that the diameter of the steel ball is large enough. The improved structure is simple in improvement and ingenious, the one-way valve, a spring and a spring seat are removed, the valve bush is shortened, the purpose is well achieved only through the steel ball and the plug, cost is lowered, and the good effect is achieved.

The invention discloses a high-efficiency plastic mixer. The high-efficiency plastic mixer comprises a support and a material mixing barrel installed on the support. A stirring paddle is installed in the material mixing barrel. The stirring paddle is connected to a stirring shaft. The stirring shaft is coaxially connected to a motor. A rotation disc is connected to the stirring shaft. The rotation disc is located above the stirring shaft. The upper surface of the rotation disc is an inclined surface. Through installation of the rotation disc on the stirring shaft and design of the inclined upper surface of the rotation disc, materials enter into the material mixing barrel and then fall on the rotation disc, and under the action of a rotation force of the rotation disc, the materials can be spread around so that stirring mixing efficiency is greatly improved and material mixing uniformity is greatly improved.

The invention discloses a high-temperature gas valve, which relates to the technical field of attitude and track control of aerospace vehicles. The attitude of the aircraft can be adjusted to enter a proper flight track through the control of the valve. By applying power to the linear motor in the forward or reverse direction, the moving coil drives the valve stem to move forward and backward, so as to control the movement of the balance ball head on the valve stem in the split cavity to form the left or right chamber. When the left chamber is connected to the high-pressure gas exhaust channel, high-pressure gas enters the exhaust channel from the left chamber and is discharged; when the right chamber is connected to the high-pressure gas channel, high-pressure gas enters from the right chamber through the jet channel working status. The control system can adjust the intake of high-pressure gas according to the flight status of the aircraft, so that the attitude of the aircraft can enter the proper flight track in a short period of time. The invention has the characteristics of small size, fast response and easy control, can meet the maneuverability, flexibility and high-precision requirements of aerospace vehicles, and improves safety guarantee.

The invention relates to a forming mould for an ecological wood textured external wall panel with textures. The forming mould sequentially comprises a mould body, a transition plate, a support plate,a first mouth mould, a second mouth mould and a water jacket, wherein a forming cavity is formed in the support plate, the first mouth mould and the second mouth mould, and an inlet of the mould bodyis machined into a circular arc with the depth of 40 mm through turning; and the central axis of the forming cavity and the central axis of a material flow runner in the mould body are arranged in a staggered mode, a material flow runner in the transition plate is an inclined runner, and the inclined runner in the transition plate enables the forming cavity to communicate with the material flow runner in the mould body. The forming mould is simple in structural improvement, practical and good in product forming effect, and has good practical use and popularization value.

The invention relates to an alcohol-based fuel reaction tank with cleaning and detecting functions. The alcohol-based fuel reaction tank comprises a tank body, wherein an alcohol-based fuel inlet anda tank body internal pressure display device are arranged at the top of the tank body, an alcohol-based fuel outlet pipe is installed at the bottom of the tank body, a liquid suction pump is installedon the alcohol-based fuel outlet pipe, a cleaning cavity is formed in the upper portion in the tank body, a water pipe is connected to the upper portion of the cleaning cavity towards the outside, aplurality of cleaning spray heads are arranged downwards at the bottom of the cleaning cavity in an arc shape, all the cleaning spray heads are used for washing the inner wall and the bottom of the tank body, and the alcohol-based fuel outlet pipe is also provided with a fuel concentration detection display device. The alcohol-based fuel reaction tank is simple in structural improvement and convenient to use, and has good actual use and popularization value.

The invention provides a high-power optical fiber amplifier, which belongs to the technical field of optical fiber amplifiers, and includes a body. Two support plate installation grooves are symmetrically opened at the front end of the body bottom plate, and two support plate installation grooves are installed in the two support plate installation grooves. A support plate, a plurality of heat dissipation grooves are arranged on the bottom plate of the body, and a heat dissipation fan is installed on the side of the bottom plate facing the inside of the body. Beneficial effects of the present invention: heat dissipation is carried out through the heat dissipation fan and the heat dissipation groove, and the heat dissipation space at the bottom is increased by using the support plate, and when the support plate is in use, the side of the high-power optical fiber amplifier equipped with a display screen and operation buttons can be lifted upwards The high position allows the operator to watch the display and operate. This high-power optical fiber amplifier is easy to improve, easy to operate, and strong in usability.

The invention discloses a hub with a tire burst emergency device which comprises an automobile hub body, the automobile hub body further comprises a rim, spokes and a spoke supporting rim, a tire beadseat is arranged in the rim through a wheel flange, an annular groove ring is further arranged at the bottom of the rim, a plurality of protrusions are evenly arranged on the annular groove ring, anda plurality of grooves is formed in the periphery of the annular groove ring. The plurality of bulges forms a tire burst emergency safety device on the annular groove ring; protrusions are formed byrolling or spinning or stamping on the annular groove ring, grooves are correspondingly formed in the other face of the annular groove ring, and therefore the protrusions and the annular groove ring form the integrated hub with the tire burst emergency device. The structure of an existing hub is changed, and the tire burst emergency safety device and the hub are combined into an integrated structure; the improved wheel hub can be engaged with a flat tire after tire burst in a grading manner, so that the flat tire cannot slide laterally, and the technical requirements that the flat tire cannotbe separated from the wheel hub after tire burst, the ground and the wheel hub are effectively isolated, and the control friction force is kept are met.

The invention relates to a device for passing of a lifting steel wire rope of an ash hopper of a wall plastering machine. The device is provided with an installation seat connected with the top of anupright post of the wall plastering machine. The installation seat is composed of an installation plate A and an installation plate B. The installation plate A and the installation plate B are connected through a welded round rod. A fixed pulley A and a fixed pulley B are symmetrically arranged on the left side and the right side of the interior of the installation seat. A fixed pulley C is arranged on the portion, between the fixed pulley A and the fixed pulley B, in the installation seat. The fixed pulley C is connected with the installation plate A and the installation plate B through a wheel shaft. The installation height of the fixed pulley C is higher than that of the fixed pulley A and the fixed pulley B. Pressure sensors are correspondingly mounted at the two ends of the wheel shaft of the fixed pulley C. Arc-shaped limiting rods are also correspondingly arranged above the fixed pulley A and the fixed pulley B. The device has a simple and practical structure through improvement, has the remarkable prevention effect on the phenomenon of deviation and sticking of the lifting steel wire rope, can prevent the ash hopper from being overweight, ensures the steady and smooth operation of an ash hopper lifting device and has good application and popularization values.

The invention relates to a wood-plastic inward opening sash sectional material forming die. A mouth die a, a mouth die b, a mouth die c, a confluence plate, a support plate a, a support plate b, a transition plate, a die body and a core rod are sequentially connected from top to bottom through screws, a Z-shaped frame is arranged in a die cavity formed by the mouth die a, the mouth die b and the mouth die c, the upper end of the Z-shaped frame is divided into a plurality of sectional frames, a C-shaped clamping groove A is formed in the lower end of the sectional frame on one side, a clampinghook A is arranged on the sectional frame on the other side, a large rectangular frame is arranged in the middle of the Z-shaped frame, a clamping hook B is arranged on the frame edge of the side, close to the C-shaped clamping groove A, of the large rectangular frame, a C-shaped clamping groove B is formed in the upper end of the other side of the large rectangular frame, an inward groove is formed in the lower end of the C-shaped clamping groove B, the upper end and the lower end of the inward groove are each provided with a clamping plate, the lower end of the Z-shaped frame is divided intoa plurality of sectional frames, a C-shaped clamping groove C is formed in the outer side of the sectional frame on one side, and a C-shaped clamping groove D is formed in the corner of the upper endof the outer side of the rectangular frame on the other side. The wood-plastic inward opening sash sectional material forming die is simple and practical in structure and has good practical use value.

The invention discloses a convenient food packaging bottle. The convenient food packaging bottle comprises a bottle body with a cylindrical inner cavity, wherein a movable plate matched up with an inner cavity wall is arranged at the bottom of the inner cavity of the bottle body, and the movable plate is connected with a pull bar extending to the opening of the bottle body. According to the convenient food packaging bottle, the movable plate matched up with the inner cavity wall is arranged at the bottom of the inner cavity of the bottle body, and the movable plate is connected with the pull bar extending to the opening of the bottle body, substances, especially semi-solid substances can be more conveniently taken out from the packaging bottle, and all the semi-solid substances in the bottle are likely to be taken out for use. The convenient food packaging bottle provided by the invention is simple in structural development, strong in practicality and obvious in progress effect.

The invention relates to a pin shaft easy to mount and demount. The pin shaft comprises a pin shaft body, a disc-shaped round head is coaxially formed at one end of the pin shaft body, an annular groove is formed at the other end of the pin shaft body, a mounting head is coaxially formed at the outer end of the annular groove, each of the upper end face and the lower end face of the mounting head is a plane, and each of the left side face and the right side face which connect the upper end face with the lower end face is a cambered surface. The pin shaft is reasonable in design, convenient to use, easy to manufacture and high in practicability, and by using the pin shaft, mounting and demounting efficiency can be improved, and great convenience is brought to working personnel.