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    • 2. 发明专利
    • Very low temperature liquefied gas tank of spaceship
    • 极低温液化气罐
    • JPS5917100A
    • 1984-01-28
    • JP12390382
    • 1982-07-16
    • Mitsubishi Electric Corp
    • SHIMADA TADANORI
    • F17C13/00F17C9/02
    • F17C9/02F17C2201/0128F17C2205/0323F17C2223/0161F17C2250/0626
    • PURPOSE:To supply a low flow rate of gas in a gaseous state under a weightless condition, by mounting a heat source for boosting the inner pressure of a tank and a pressure detector in a storage tank, and meanwhile, constituting a pressure regulating tank such that the pressure therein can be maintained at a value within an allowable range. CONSTITUTION:A temperature signal by a temperature detector 11 is fed back, and a pressure regulating tank is maintained at a given temperature higher than the liquefying temperature of gas through the working of a heater 9. A pressure is monitored by a pressure detector 10, and when the pressure in a pressure regulating tank attains an allowable lower limit, a secondary valve 13 is closed, a primary valve 12 is opened, gas, in which a liquid phase 2 and an air phase 3 are mixed, is guided from a storage tank 1, and when the pressure detector 10 finds that the pressure in the pressure regulating tank attains the allowable upper limit, the primary valve 12 is closed. In order to increase the internal pressure of the storage tank 1 to a value higher than the allowable upper limit pressure of a pressure regulating tank 7, the internal pressure is increased to a given value by heating the storage tank by means of a heat source 4 for boosting a pressure.
    • 目的:在无重力条件下,通过安装用于将储罐和压力检测器的内压升高的热源安装在储罐中,以气态提供低流量的气体,同时构成压力调节罐, 其中的压力可以保持在允许范围内的值。 构成:通过温度检测器11的温度信号被反馈,并且压力调节罐保持在比通过加热器9的加工的气体的液化温度高的给定温度。压力由压力检测器10监测, 并且当压力调节槽中的压力达到允许下限时,二次阀13关闭,主阀12打开,液相2和空气相3混合的气体从储存器 罐1,当压力检测器10发现压力调节罐中的压力达到允许上限时,主阀12关闭。 为了将储罐1的内部压力提高到比压力调节槽7的容许上限压力高的值,通过利用热源4对储罐进行加热,将内部压力提高到规定值 增加压力。
    • 3. 发明专利
    • EXTREMELY LOW TEMPERATURE LIQUEFIED GAS TANK FOR SPACE SHIP
    • JPS5881298A
    • 1983-05-16
    • JP17794481
    • 1981-11-06
    • MITSUBISHI ELECTRIC CORP
    • SHIMADA TADANORI
    • F17C3/08F17C13/08
    • PURPOSE:To remarkably reduce the inflow of conduction heat, to reduce the gasification quantity of liquefied gas, and to suppress a decrease of the storage quantity by making the positions of heat insulating rods variable so as to use the minimum support structure under a gravity-free state. CONSTITUTION:When a space ship is launched, heat insulating rods 3a-3e are at the positions capable of holding a liquefied gas storage tank 1 (the same as those in the past). When the space ship enters a stationary orbit and is put in a gravity-free state, a drive motor 3 is rotated so as to move the heat insulating support rods 3a-3c to the places not contacting the tank 1 by means of the force of a pinion 9 and a rack 10 (a state shown in the figure). Accordingly, during a launching time of the space ship when a large load is applied, the structural strength similar to that in the past can be maintained, and under a gravity-free state, the heat insulating rods having become unnecessary stracturally are removed from the tank, thereby the gasification quantity of liquefied gas can be reduced, the quantity of gasified gas discharged through a relief valve 6 can be reduced, and a decrease of the storage quantity can be suppressed.
    • 5. 发明专利
    • Ion source
    • 离子源
    • JPS58192248A
    • 1983-11-09
    • JP7471182
    • 1982-05-04
    • Mitsubishi Electric Corp
    • SHIMADA TADANORI
    • H01J3/04F03H1/00H01J27/04
    • H01J27/02F03H1/0043
    • PURPOSE:To obtain an ion source of extremely simplified construction while keeping the performance as before such as ionization efficiency or the like by composing a baffle of two meshes and a cylindrical hollow column for suring a space of said meshes. CONSTITUTION:A baffle 3 is composed of two meshes 18 and a hollow column 19 so that potential inside of the baffle is supplied exclusively from a gap between the baffle 3 and ball pieces 5 on the upstream side because the baffle 3 does not transmit electrons 17 due to its maintained potential. On the other hand, the baffle 3 part transmits neutral atoms 17 having no chare. Accordingly, a servicing quantity of neutral atoms from an electron servicing part can be held small even in an ion source having a big required servicing quantity of the neutral atoms not less than 10cm in the ion diameter thus causing no drop of main plasma potential while being able to obtain the ionization efficiency as before besides requiring no new neutral atom servicing system or distributor and being able to constitute the ion source with extremely simplified construction as well as to remarkably reduce its weight when utilized as an ion engine for an artificial satelite.
    • 目的:通过组合两个网孔的挡板和圆柱形空心柱来获得离子源极其简化的结构,同时保持前所未有的性能,如离子化效率等,用于移动所述网孔的空间。 构成:挡板3由两个网眼18和中空柱19组成,使得挡板内部的电位仅在挡板3和上游侧的球片5之间的间隙中提供,因为挡板3不透射电子17 由于其保持潜力。 另一方面,挡板3部分透射没有发光的中性原子17。 因此,即使在离子源中具有大于10cm的中性原子的所需维修量的离子源,电子维修部件的中性原子的维修量也可以保持较小,从而不会下降主要等离子体电位,同时 能够获得如前所述的电离效率,除了不需要新的中性原子维修系统或分配器,并且能够以非常简单的结构构成离子源,并且当用作人造卫星的离子发动机时显着降低其重量。
    • 7. 发明专利
    • ION ENGINE
    • JPH03151574A
    • 1991-06-27
    • JP29054589
    • 1989-11-08
    • MITSUBISHI ELECTRIC CORP
    • SHIMADA TADANORI
    • H05H5/00F03H1/00
    • PURPOSE:To secure a better focusing property of an ion beam by constituting an ion extracting system of a screen grid, a plurality of accelerating grids and a plurality of decelerating grids, the ion extracting system extracting generated ions by means of acceleration. CONSTITUTION:A porous screen grid 2 for forming an ion emitting surface, a porous accelerating grid 3 for extracting and taking out only ions as a focusing beam from the ion emitting surface by means of acceleration, a porous decelerating grid 4 for providing space potential to ions emitted are disposed on one face of an ion generating chamber 1 and an ion extracting system comprises these grids. In this case, a second accelerating grid 10 is added to the accelerating grid 3. A stepwise accelerating voltage is applied to each of the accelerating grids 3, 10 and the focusing property of ions is enhanced by the effect of an electron lens. Reduction of grid abrasion caused by non-focused ions, etc., is thereby achieved.
    • 8. 发明专利
    • Source of ion
    • 离子源
    • JPS59160078A
    • 1984-09-10
    • JP3479483
    • 1983-03-03
    • Mitsubishi Electric Corp
    • SHIMADA TADANORI
    • H01J3/04F03H1/00H01J27/20
    • H01J27/00F03H1/0012
    • PURPOSE:To operate at the optimum operating point by a method wherein a neutral atom supplying vessel is provided with a function capable of controlling variably a distributing ratio of the amount of neutral atoms supplied to a hollow cathode and the same supplied to a distributor. CONSTITUTION:The total number of the neutral atoms 17, which are sent to an ion production chamber, are divided by the temperature of a supplying path for the distributor in accordance with the heating amount of a heater 20 except the conductance of a pipeline into two parts of the neutral atoms 18 supplied to the hollow cathode and the same atoms 19 supplied to the distributor. Accordingly, the distributing ratio between the supplying amount of the neutral atoms for the hollow cathode and the same for the distributor may be controlled variably by changing the heating amount of the heater 20. As a result, in case it is applied to an ion engine, the engine may be operated at the optimum point of ionization efficiency in the whole area of variable range of the thrust of the engine.
    • 目的:通过一种方法来操作最佳工作点,其中中性原子供应容器具有能够可变地控制供给中空阴极的中性原子的量与供给到分配器的分配比的分配比的功能。 构成:将发送到离子产生室的中性原子17的总数除以配管的供给路径的温度除以加热器20的加热量除管道的电导量为二 提供给中空阴极的部分中性原子18和提供给分配器的相同原子19。 因此,可以通过改变加热器20的加热量来可变地控制空心阴极的中性原子的供给量与分配器的供给量之间的分配比例。结果,在将其应用于离子发动机 发动机可以在发动机推力可变范围的整个区域的最佳电离效率点下运行。