摘要:
A position-data converter and a motor-drive control device are connected. The position-data converter receives two-phase, sine-wave analog signals da and db from two first magnetic detectors, respectively, and converts these signals da and db to position data. On receiving a positioning instruction, the motor-drive control device calculates the value of current, from the current position signal generated by the position-data converter. The permanent magnets incorporated in a linear motor are used as components of a linear scale, as well.
摘要:
To provide a grounding structure for connecting and fixing a printed circuit board and a conductive frame to a conductive chassis of an electronic apparatus, the height of solder applied to the grounding land is made uniform, thereby ensuring electrical connection between the printed circuit board and the conductive chassis. A copper-foil coating 54 formed on a printed circuit board 50 is divided by a substantially-lattice-shaped resist 55 to form a grounding land 56 including a plurality of obliquely elongated land elements 56c in an area close to the edge of an opening 51 and a plurality of rhombic land elements 56a in the remaining area, and the grounding land 56 is brought into contact with and screw-clamped to a conductive chassis 60 using a locking leg 41.
摘要:
There is provided an electrolytic integrated polishing apparatus which enables high precision polishing of the internal surface of a long sized cylindrical workpiece such as a metallic tube. The apparatus includes a work supporting unit for disposing the cylindrical workpiece, so that the axial center of the cylindrical portion is aligned with the vertical direction, a rotation shaft supported downward along the vertical direction and free-rotatably supported in an external tube which is freely movable along the vertical direction, a tool electrode including a grindstone directed to radial directions, attached to the tip of the rotation shaft, and a plastic tube wound around the external surface of the external tube for pressurization.
摘要:
The present invention relates to a heat-bonded type vibration-damping resin for a structural member which contains in view of a preferable blending rate asphalt, synthetic rubber, petroleum resin and filler material, and further a heat-bonded type vibration-damping resin for a structural member which contains in view of a preferable blending rate asphalt, filler material, blowing agent. In addition, its basic concept consists in a configuration in which the vibration-damping resin is formed into a sheet and arranged at the surface of the metallic structure used at a place where vibration and noise should be prevented so as to form the vibration-damping structure and a method for manufacturing the vibration-damping structure. The vibration-damping resin can be easily mounted on the surface of the metallic structure having an elongated shape, bonded to it by heating and has a workability in which the mounting work to the metallic plate may be facilitated. In addition, thermoplastic resin and the like can be arranged between the metallic plate and the vibration-damping resin.
摘要:
In fuel gasification, particles of, for example, coal and an oxidant are supplied to a reactor, where the coal particles are gasified. The gas thus produced may contain molten slag entrained therein and such slag could subsequently solidify and affect other components of the coal gasification apparatus. Therefore a molten slag cooling heat exchanger is positioned directly above the reactor and this cools the gas so as to cause any molten slag therein to solidify. Hence, such molten slag does not reach an evaporator above the molten slag cooling heat exchanger, so that the efficiency of the evaporator will be maintained. However, solidified molten slag may build up on heat exchange tubes of the molten slag cooling heat exchanger. Therefore, the rate of coolant supplied to the molten slag cooling heat exchanger is varied, to cause expansion and contraction which causes solidified slag to be dislodged. Hence the efficiency of the molten slag cooling heat exchanger does not deteriorate. Cleaning gas and coal particles may be jetted onto the evaporator to dislodge ash or soot therefrom.
摘要:
A water ozonization system equipped with a filter in that water can be treated with ozone through the steps of installing a diverging pipe therein to allow part of raw water to diverge from the discharge side of a raw water pump, the diverging pipe being fitted with an ejector; injecting and introducing the ozone obtained from an ozonizer into the ejector via its suction port in order to form ozonous water; returning the ozonized water via a diverging pipe to the suction side of the raw water pump; and supplying the ozonous water and unreacted ozonizing gas to the whole quantity of raw water within the limit to which the raw water pump produces no cavitation so as to increase ozone absorption efficiency with the agitation of pump impellers for accelerating ozonization and the reaction of the unreacted ozonizing gas in the raw water pump on the whole quantity of the raw water by ozonizing means.
摘要:
A water ozonization system equipped with a filter in that water can be treated with ozone through the steps of installing a diverging pipe therein to allow part of raw water to diverge from the discharge side of a raw water pump, the diverging pipe being fitted with an ejector; injecting and introducing the ozone obtained from an ozonizer into the ejector via its suction port in order to form ozonous water; returning the ozonized water via a diverging pipe to the suction side of the raw water pump; and supplying the ozonous water and unreacted ozonizing gas to the whole quantity of raw water within the limit to which the raw water pump produces no cavitation so as to increase ozone absorption efficiency with the agitation of pump impellers for accelerating ozonization and the reaction of the unreacted ozonizing gas in the raw water pump on the whole quantity of the raw water by ozonizing means.
摘要:
A pair of through holes are formed in a circuit board, and a silver paste filled up in the through holes connects lands formed on a front surface and a rear surface of the circuit board, respectively to each other. When the silver paste is solidified, the silver paste bulges curvedly from the front and rear surfaces of the circuit board and forms a bump. A surface of the bump is covered with an overcoat. An electronic component is brought into contact with the bump, thereby forming a degassing gap between the electronic component and the circuit board. A gas generated during soldering is discharged from the penetrating hole, into which the lead terminal is inserted, to an outside via the gap between the electronic component and the circuit board.
摘要:
To improve the thermal efficiency when an exhaust heat recovery type combined cycle plant having a gas turbine and a steam turbine in combination is operated at a partial load, the gas turbine exhaust is recirculated and returned to the compressor, and the combustion temperature is prevented from being lowered at the partial load. Preferably, the temperature is maintained constant. In this way, the thermal efficiency during operation at partial load can be improved.
摘要:
A truss type extruded aluminum section is formed of a pair of planar plates and ribs, wherein hollow portions are formed within said section by the ribs and the planar plates. Vibration-damping resin is provided on the inner surfaces of hollow portions, and particularly on the inner surface of the planar plate and on a single surface of the inclined rib. With this arrangement, the vibration energy bending the planar plate and the rib is converted into a heat energy. In the case of manufacturing such truss type extruded aluminum vibration-damping section, for making easy the insertion of the vibration-damping resin in the hollow portion, the vibration-damping resin is stuck on a plastic film to form a long planar body. The plastic film serves as a cover or an adhesive. Moreover, in the case of directly inserting the vibration-damping resin sheet, the vibration-damping resin sheet is subjected to embossing on the adhesive-bonding side for allowing air to escape. Additionally, in the case using an age-hardening type aluminum alloy, the adhesive-bonding for the vibration-damping resin by heating is performed along with the heat treatment for age-hardening.