41results about How to "Large thermal expansion" patented technology

A thin-film magnetic head that has a configuration in which the element-formed surface and the opposed-to-medium surface are perpendicular to each other, and a light source is sufficiently distanced from the medium surface is provided. The head comprises at least one near-field-light-generating layer for heating a part of a magnetic medium during write operation by generating a near-field light, having a shape tapered toward a head end surface on the opposed-to-medium surface side, and comprising a near-field-light-generating portion having a light-received surface and a tip reaching the head end surface on the opposed-to-medium surface side, and the light-received surface being sloped in respect to the element-formed surface and being provided in a position where an incident light propagating from a head end surface opposite to the opposed-to-medium surface can reach at least a part of the light-received surface.

A range finder includes a package, a semiconductor chip, an optical casing, a lens holder, a first lens, and a second lens. The first and second lenses are attached to the lens holder. The lens holder is formed of a material having a thermal expansion coefficient equal or close to that of the semiconductor chip. The range finder is constructed such that a distance between the two lenses and a distance between two light detecting sections on the semiconductor chip do not change significantly relative to each other due to the thermal expansion or contraction.

The invention discloses a rapid type pipeline connector. The rapid type pipeline connector comprises a pipeline connector, one or more rapid type connecting ports used for external connecting pipelines are formed in the pipeline connector, the inner wall of each rapid type connecting port is provided with a circle of connecting groove communicating to the end surface of the rapid type connecting port, and a sealing assembly is placed in each connecting groove. Each rapid type connecting port is sleeved with a rapid connecting assembly, and each rapid connecting assembly comprises a rapid connecting inner annular cover, an outer cylinder cover and a receding stopping sleeve, wherein the rapid connecting inner annular cover sleeves the corresponding connecting port and blocks the outside of the sealing assembly, the outer cylinder cover sleeves the corresponding rapid connecting inner annular cover and the corresponding connecting port, and the receding stopping sleeve is mounted in the corresponding outer cylinder cover and located at the outside of the corresponding rapid connecting annular cover. The external connecting pipelines can penetrate through the receding stopping sleeves and the rapid connecting inner annular covers to be inserted into the sealing assemblies in the connecting ports. According to the rapid type pipeline connector, rapid mounting and dismounting operation of the external connecting pipelines can be achieved, modularized connecting of multiple rapid connecting pipe fittings can be further achieved, and use is flexible and convenient.

The invention relates to assembling members (1, 2) using bearings to assemble a rotating shaft (3) in a housing (4). Each bearing comprises an outer ring (5) and an inner ring (6), each assembling member has an annular accommodation part defined between an inner bearing surface (8) of the housing (4) and an outer bearing surface (9) of a shaft (3), the bearing is arranged in the annular accommodation part, he inner ring (6) is mounted in a clamping manner surrounding the outer bearing surface (9), the thermal expansion of the outer ring (5) is lower than that of the inner bearing surface (8), each assembling member also comprises a sleeve (10) made of thermoplastic material, the sleeve in inserted between the inner bearing surface (8) and the outer ring (5), the thermal expansion of the sleeve is larger than that of the outer ring (5), the sleeve has an annular geometrical shape which is broken by a slot (11) in a circumferential direction, so that the diameter of the sleeve can be changed, and under the ambient temperature, radial clearances are formed between the inner bearing surface and the sleeve and/or between the sleeve and the outer ring.

A piston for a cylinder for an internal combustion engine has a piston bowl surface adapted for facing a combustion chamber of the cylinder, the piston bowl surface being provided with a thermal barrier coating layer, wherein the thermal barrier coating layer is provided on a plurality of circumferentially spaced surface parts of the piston bowl surface. A method for producing a piston for a cylinder for an internal combustion engine includes the steps of providing a piston for a cylinder for an internal combustion engine, the piston having a piston bowl surface adapted for facing a combustion chamber of the cylinder, and providing the piston bowl surface with a thermal barrier coating layer, wherein the step of providing the thermal barrier coating layer is made on a plurality of circumferentially spaced surface parts of the piston bowl surface.

Four rod electrodes (50a to 50d) for separating ions according to a mass-to-charge ratio are held by a rod holder (51). The rod holder (51) is placed on a metal holder sustaining stand (52) provided on a bottom surface of a vacuum housing (1), and is fixed while being pressed by a fixation band (53) fixed to the holder sustaining stand (52) with screws (56). The fixation band (53) has a coating film layer (532) formed by a black nickel plating process on the entire surface of a main member (531) made from phosphor bronze. The coating film layer (532) has high emissivity, and thus heat transferred from the rod holder (51) to the fixation band (53) is efficiently radiated into the vacuum housing (1). Therefore, heat generated in the rod holder (51) due to dielectric loss is efficiently dissipated, and deformation of the rod holder can be reduced.

The invention relates to a base aiming at aluminum alloy cold plate brazing. The base is characterized in that the base comprises base plates (4) and a supporting plate (5), and the multiple base plates (4) are arranged on the supporting plate (5) at intervals; and during welding, an upper cover plate (1) and a lower bottom plate (2) of an aluminum alloy cold plate are placed on the base and thenplaced into a stainless steel tool frame, fastening force is applied, and then welding is carried out. The base has the advantages that according to the overall technological path, a base plate used in a traditional method for aluminum alloy cold plate brazing is broken up into parts, the form of multiple base plates are arranged is designed, the influence of friction plate of the base plates andthe lower bottom plate of the cold plate on brazing is reduced, and brazing quality is improved.

A method for producing an electronic module (10) is proposed in which a sensor element (18) having a mounting device (30) is attached to an external surface (16) of a printed circuit board element (14), wherein the sensor element (18) has a sensor area (22) and a base area (20) that can be plasticized at least in sections. The method is characterized in particular in that the base area (20) is plasticized up to a plasticization length (44) that is measured from the base surface (19) of the sensor element (18) in a z direction (24); the plasticized base area (20) and the external surface (16) of the printed circuit board element (14) are joined together such that the sensor area (22) is arranged with a defined positioning accuracy at a target distance (50) to a reference point (36a) which is fixed relative to the external surface (16), and the plasticized base area (20) is subsequently solidified, wherein the positioning accuracy is smaller than the plasticization length (44). As a result of this, the sensor area (22) can be arranged with accuracy at the target distance (50) independently of the component tolerance of the printed circuit board element (14) and/or of the sensor element (18), which accuracy is exclusively determined by the mounting device (30).

The invention proposes a method (2) for coating a turbine blade (1) comprising an airfoil (4) and at least one platform arranged at the end of the airfoil (4) (2), wherein the or each platform (2) has a contact region (6) and at least one planar raised region (8a, 8b) adjacent to the contact region (6), and the airfoil ( 4) terminating in the contact zone (6), with the following method steps: applying at least a first layer (22) of the coating (24) on the airfoil side on the platform (2), and applying the coating (24) ) of the at least first layer (22) remaining on the end face (10c) within the range of the contact zone (6), the at least first layer (22) of the coating (24) in the protruding zone (8a, 8b) are removed from at least one end face (10a, 10b) of the platform (2).