摘要:
A portion at which a steam passage opens to a slide surface of a fixed side valve plate and a movable side valve plate of a rotary valve is reinforced with a reinforcing member having chipping resistance and abrasion resistance. Therefore, it can be prevented that an edge portion of the opening of the steam passage is chipped due to pulsation or the like of the pressure of high-temperature high-pressure steam supplied thereto and a resultant fragment damages the slide surface, or that abrasion dust generated from the slide surface damages the edge portion of the opening of the steam passage. Thus, the high-temperature high-pressure steam is prevented from short-cutting from the high-pressure side to the low-pressure side via the damage of the slide surface, and the supply timing of the high-temperature high-pressure steam is prevented from being upset, thus inhibiting the reduction in efficiency of an expander.
摘要:
In a rotating fluid machine, a high-pressure working medium introducing hole, for introducing high-temperature high-pressure steam to a slide surface, is opened to a fixed side valve plate. Therefore, when a single first high-pressure working medium passage which opens from the fixed side valve plate to the slide surface and a plurality of second high-pressure working medium passages which open from a movable side valve plate to the slide surface, sequentially communicate with each other with rotation of a rotor, the high-temperature high-pressure steam from the first high-pressure working medium passage and the high-temperature high-pressure steam from the high-pressure working medium introducing hole are uniformly introduced to the entirety of the slide surface, and a change in the surface pressure of the slide surface is suppressed to stabilize the behavior of the fixed side valve plate, thus preventing leakage of the high-temperature high-pressure steam and the occurrence of abnormal wear.
摘要:
A fixed side valve plate slides in contact with a movable side valve plate provided at a rotor of a rotary valve for supplying and discharging high-temperature high-pressure steam to and from an expansion chamber of an expander via a slide surface. The fixed side valve plate includes an expansion region having a large sliding area to which a circular steam supply passage opens, and an exhaust region having a small sliding area to which an arc-shaped steam discharge passage opens. An unsymmetrical recessed portion formed in a central portion of the slide surface and an arc-shaped notch formed at an outer peripheral portion of the expansion region, make the sliding area of the expansion region and the sliding area of the exhaust region substantially correspond to each other to make the surface pressure uniform, thereby preventing uneven abrasion of the slide surface to suppress leakage of steam.
摘要:
A rotary valve for switching supply passages, and discharge passages of high-temperature and high-pressure steam for a rotor rotatably supported at a casing is constructed by making a fixed side valve plate and a movable side valve plate abut to each other on a slide surface. A pressure chamber into which the high-temperature and high-pressure steam is introduced from the supply passage is opened to a mating surface of a valve body portion with the fixed side valve plate. The fixed side valve plate supported to float is pressed against the movable side valve plate with a pressing load generating in the pressure chamber to bring it into close contact with the slide surface. Leakage of the high-temperature and high-pressure steam from the pressure chamber is prevented by placing a V-packing inside the pressure chamber.
摘要:
A rotary valve of a rotating fluid machine is constructed by bringing, into contact on sliding faces, a moving valve plate and a stationary valve plate, and high pressure working medium passages and low pressure working medium passages penetrate mating faces of a valve body and the stationary valve plate. By sealing the outer circumference of the mating faces with a first sealing member and sealing the circumference of the low pressure working medium passages with a second sealing member inside the first sealing member in the radial direction, the pressure of a high pressure working medium leaking out of the high pressure working medium passages to the mating faces is caused to act on substantially the whole area of the mating faces, thereby preventing local deformation of the stationary valve plate and ensuring close contact between the sliding faces.
摘要:
A rotary fluid machine includes a first operating part (49) and a second operating part (57), which are groups of axial piston cylinders, wherein a rotary valve (61) for controlling the intake and discharge of a working medium to and from the first and second operating parts (49, 57) is formed from a first valve part that has a flat sliding surface (68) perpendicular to a rotational axis (L) of the rotor (27) and controls the intake and discharge of the working medium to and from the first operating part (49), and a second valve part that has a cylindrical sliding surface (71) centered on the rotational axis (L) of the rotor (27) and controls the intake and discharge of the working medium to and from the second operating part (57). Since the intake and discharge of the working medium to and from the first and second operating parts (49, 57) are controlled by the common rotary valve (61), the size of the rotary fluid machine can be reduced.
摘要:
A metal annular gasket comprising an annular metal base plate; a compound layer integrally laminated on both surfaces of the annular metal base plate, the compound layer being made of synthetic resin or a rubber material mixed with a fiber material; and an annular seal layer having a circumferential covering portion which covers the inner circumferential edge of the annular metal plate and the inner circumferential edge of both compound layers, the compound layer being made of synthetic resin or a rubber material. The annular seal layer is formed such that the surface of the annular seal layer is so connected to the surfaces of the compound layer as to provide smooth transition in its thickness direction.
摘要:
There is provided a manganese oxide film forming method capable of forming a manganese oxide film having high adhesivity to Cu. In the manganese oxide film forming method, a manganese oxide film is formed on an oxide by supplying a manganese-containing gas onto the oxide. A film forming temperature for forming the manganese oxide film is set to be equal to or higher than about 100° C. and lower than about 400° C.
摘要:
A lens member includes a light-incident side; a light-exit side that is opposite to the light-incident side, a Fresnel lens arranged on a center axis that passes through a center of the light-incident side, and a diffraction grating structure arranged around a periphery of the Fresnel lens and having a center through which the center axis passes. Also, it is disclosed that the Fresnel lens may include a first Fresnel lens and a second Fresnel lens, the first Fresnel lens includes annular prisms that are divided from a convex lens and having a center through which the center axis of the light-incident side passes, and the second Fresnel lens includes annular prisms that are divided from a TIR lens and arranged around the periphery of the first Fresnel lens, centering around the center axis of the light-incident side.
摘要:
A film forming method performs a film forming process on a target object having on a surface thereof an insulating layer. The film forming method includes a first thin film forming step of forming a first thin film containing a first metal, an oxidation step of forming an oxide film by oxidizing the first thin film, and a second thin film forming step of forming a second thin film containing a second metal on the oxide film.