Abstract:
A track body rubber with a blowout prevention groove is provided to prevent blowout by discharging air created inside the track body rubber by repeated load. In a track body rubber(51) with a blowout prevention groove(52), the diameter of the blowout prevention groove range 1mm to 5mm. the number of the blowout prevention groove is more than one. The blowout prevention grooves are formed downwards from the top of the track body rubber. The blowout prevention grooves is formed to discharge air created inside the track body rubber by repeated load.
Abstract:
A method for producing rubber for a track shoe body is provided to obtain rubber that has excellent heat resistance, wear resistance and blow out resistance, allows high-speed driving of a track vehicle, and to improve durability of a track assembly. A method for producing rubber for a track shoe body comprises the steps of: forming rubber by using a composition comprising 100 parts by weight of base rubber formed of 10-30 wt% of natural rubber and 70-90 wt% of synthetic rubber, and 40-100 parts by weight of carbon black formed of 10-40 wt% of carbon black N330 and 60-90 wt% of carbon black N550; and carrying out post-vulcanization for 12-36 hours.
Abstract:
A high voltage DC power supplier includes: a transformer driven by a switching device, transforming an input voltage to a certain level of high voltage, and outputting the transformed high voltage; a diode and a capacitor for rectifying and smoothing the high voltage outputted from the transformer, and supplying the smoothed voltage to an ER fluid application unit; a discharge circuit for forcibly discharging the output voltage when an output voltage of the capacitor descends; and a controller for controlling a turn-on operation of the switching device on the basis of a difference value between the output voltage and a reference voltage so that the output voltage can follow a target voltage, and outputting a control signal for driving the discharge circuit to the discharge circuit when it reaches a discharge period.
Abstract:
본 발명은 수용성 전분을 전도성 입자로 함유하는 전기변성유체에 있어서, 상기 전기변성 유체의 수분 함량이 5 중량% 미만인 전기변성유체를 제공한다. 이러한 전기변성유체는 전도성 입자인 수용성 전분을 비전도성 용매 중에 분산시킴으로써 전기장 무부하 시에는 뉴토니안 유체(Newtonian Fluids)의 특성을 나타내지만, 전기장 부하시 전기장의 증가에 따라 항복응력과 가점성이 증가하여 유동을 제어할 수 있는 특성을 보인다. 이러한 특성은 현가장치, 제진대, 엔진 마운트 등의 제어가 가능한 가변감쇠기구나 브레이크, 클러치 등의 동력장치에 응용이 가능하며, 자동차 및 항공산업 등을 비롯한 많은 분야에서 적용이 가능하다.
Abstract:
폴리파라페닐렌에 FeCl 3 를 침투시켜 제조한 반도체성 고분자 입자를 분산상으로 사용하여 전기유동유체를 제공한다. 절연성의 오일을 분산 매질로 하고 입자의 질량 분율이 10~20%인 본 발명의 전기유동유체는 전기장 하에서 빠르게 고체화되어 큰 점도의 증가와 항복 응력을 나타내고, 전력 소모가 적으며 FeCl 3 를 이용한 도핑의 정도에 따라 전기유동유체로서의 물성치(항복응력의 크기, 전기 전도도 등)를 조절할 수 있는 특성을 가진다. 특히, 본 유체는 약 -10 에서 100
Abstract:
PURPOSE: A rod-arm type dynamic characteristic testing device for a suspension, a testing method, and a dynamic characteristic testing system are provided to accurately perform a dynamic characteristic test of a suspension for high-weight material with a structure minimizing friction under an environment similar to an actual vehicle condition. CONSTITUTION: A rod-arm type dynamic characteristic testing device for a suspension includes a body, a rod arm, an excitation plate (120), a connection bar, an actuator (130), a displacement sensor, a joining unit, and a plurality of rods. The body is joined to a fixed structure and includes an acceleration sensor. An end portion of the rod arm is joined to the body, and a rod wheel (102) is formed on the other end portion thereof. The excitation plate is arranged to be in contact with the rod wheel. The connection bar is connected to the excitation plate so that the excitation plate is freely vibrated as a free end. The excitation plate forms a 4-joint link structure connecting the fixed structure and the excitation plate each other, thereby controlling the excitation plate to be moved vertically. The actuator excites the excitation plate. The displacement sensor measures the relative displacement of the body with respect to the fixed structure.
Abstract:
본 발명은 수용성 전분을 전도성 입자로서 포함하며, 유체의 유동성 향상과 입자의 침전 현상을 완화시키기 위하여 첨가제가 첨가된 전기변성유체에 관한 것이다. 본 발명에 따른 전기변성유체는 현가 장치, 제진대, 엔진 마운트 등의 제어가 가능한 가변감쇠 기구, 또는 브레이크, 클러치 등의 동력 장치에 응용이 가능하다.
Abstract:
PURPOSE: A circuit for controlling a discharge of a high-voltage DC(Direct Current) power supplier is provided to improve the control property by adding a discharge circuit to an output terminal of a flyback converter to discharge rapidly a voltage stored in a capacitor. CONSTITUTION: A transformer(T1) is driven by a MOS transistor(M1) which is a switching device to convert an input voltage(Vs) into a predetermined level of a high voltage and output it. A diode(D1) and a capacitor(C1) rectify and smooth the high voltage outputted from the transformer(T1) to supply it to an ER(Electro-Rheological) fluid application equipment. When an output voltage(Vo) of the capacitor(C1) drops, a discharge circuit(2) discharges rapidly the output voltage(Vo) by force. A controller(4) controls a turn-on operation of the MOS transistor(M1) based on an error component of the output voltage outputted from a subtractor(3) and outputs a control signal for driving the discharge circuit(2) at every time when reaching to a discharge period.
Abstract:
PURPOSE: An electrically reformed fluid is provided to impart unique features of Newtonian fluid at non-load state of electric field whereas flow control ability at load state of the field by comprising dried water-soluble starch as the conductive particulate. CONSTITUTION: The reformed fluid is prepared by grinding the water-soluble material(103) into less than 10 micrometer size particles by means of grinder(141); drying the particles in a constant-temperature and humidity device(142) under a condition of 35-45 deg.C and 30-50% of relative humidity; blending the dried material with a non-conductive solvent(102) selected from silicon oil, transformer oil, transformer insulating solution, mineral oil or olive oil alone and/or in combination with two of them in a weight ratio of 5-70wt.% based on the solvent in a container(143); heating the obtained fluid in an oil bath(144) of 100-150 deg.C; alternatively grinding the prepared electrical reformed fluid regularly miscible together in another grinder(145); and introducing the fluid(101) into a bottle(146). The reformed fluid has 5wt.% or less of water content.