摘要:
A heat exchanger having excellent heat exchanging performance is obtainable by a simple production technique and at a low cost. This is achieved by providing a fin member and by increasing heat conductivity between the fin member and a meandering pipe body. Further, the heat exchanger is made compact for high degrees of layout freedom, enabling the heat exchanger to be installed in a tight space. Engagement grooves (8) are provided in both end surfaces (6, 7), which are opposite to each other, of a fin member (5) in which fins (4) are parallel arranged. Straight pipe sections (2) are parallelly arranged, with gaps (16)in between, in the engagement grooves (8) of the fin member (5). The straight pipe sections (2)a are connected at bent sections (3). A pair of meandering sections (11, 12) is arranged opposite to each other with an insertion gap (17) of the fin member (5) in between. On (11) of the meandering sections and the other meandering section (12) are connected by a connection pipe (13) to form a meandering pipe main body (1). The straight pipe sections (2) of the one meandering section (11) are arranged in the engagement grooves (8) in the one end surface (6) of the fin member (5) inserted and arranged in the insertion gap (17) between the one meandering section (11) and the other meandering section (12) of the meandering pipe body (1), and the straight pipe sections (2) of the other meandering section (12) are arranged and fixed in the engagement grooves (8) in the other end surface (7).
摘要:
The present invention relates to a process for producing a pyridylethylthio compound which is improved in yield of the pyridylethylthio compound. In a process for producing a pyridylethylthio compound by reacting vinyl pyridine with a sulfur-containing compound, vinyl pyridine used contains a compound represented by the general formula (1): (wherein R1 and R2 are any of combination of isopropenyl group and a hydrogen atom, combination of 1-propenyl group and a hydrogen atom, combination of 2-propenyl group and a hydrogen atom, and combination of methyl group and vinyl group), in an amount of not more than 4% by weight.
摘要:
A content distribution system includes a node to which content is distributed via a network and a distribution management server for managing a content distribution status.The node receives content, detects an information amount of received content, and, on the basis of the detected information amount, outputs a distribution completion notification indicative of a reception status of corresponding content.On the other hand, the distribution management server receives the distribution completion notification for each node, and stores the received distribution completion information for each node.
摘要:
In a multilayer piezoelectric actuator, external electrodes are formed on external surfaces of a multilayer piezoelectric body in which a plurality of internal electrodes and a plurality of piezoelectric layers are stacked on top of one another. Each of the external electrodes includes a base electrode and a stress-absorbing external-electrode member formed on the base electrode. The stress-absorbing external-electrode member is provided with an elastically deformable elastic structure, and a planar portion, which is continuous with the elastic structure and has at least an area sufficient for bonding a feeder terminal such as a lead line thereto.
摘要:
An aspect of the present invention is a method of processing a waste material that contains mercury or a mercury compound, and chlorine or a mercury chloride, the method including a step of adding a chlorine scavenger to the waste material, and stowing the waste material in a treatment vessel; and a step of subjecting the waste material to a blasting treatment by fitting an explosive to the treatment vessel and detonating the explosive inside a pressure-proof container.
摘要:
In a method for manufacturing a piezoelectric actuator, a ceramic sintered body is prepared and a size of the ceramic sintered body is adjusted in a thickness direction defined below by grinding piezoelectric ceramic layers, included in the ceramic sintered body, located outermost in the thickness direction. In the ceramic sintered body, internal electrodes are each disposed between piezoelectric ceramic layers. The thickness direction is defined as the direction along the thickness of the piezoelectric ceramic layer. Each of the inert sections are disposed on at least one side of the active section, for driving the piezoelectric actuator, in the thickness direction. Dummy internal electrodes are arranged in the inert sections such that each of the dummy internal electrodes are each located between ceramic layers. The thickness of the piezoelectric ceramic layers disposed between the dummy internal electrodes increases with distance from the active section.
摘要:
A connection head structure of a high pressure fuel injection tube is provided to avoid an interference between an annular flange and an opposing part by sufficiently maintaining an tube axial direction length of the connection head and to obtain a good sealability to prevent leaking during autofrettage processing with a high pressure of not less than 300 MPa. A connection head structure of a high pressure fuel injection tube includes, on a connection end portion of a thick walled fine steel tube, a spherical seat face, an annular flange, and a circular conic face that continuously extends from the seat face, wherein a washer and a fastening nut are assembled, characterized in that when a thick walled fine steel tube has t (wall thickness)/D (outer diameter)
摘要:
A multilayer piezoelectric device including a body having internal electrode layers and piezoelectric ceramic layers alternately stacked. The internal electrode layers contain Cu as a major component, the piezoelectric ceramic layers contain a compound oxide represented by Pb(Ti, Zr)O3 as a major component, and a metal oxide (Nb2O5, Sb2O5, Ta2O5, or WO3) containing Nb, Sb, Ta, or W, which is at least one of a pentavalent metal element and a hexavalent metal element, is incorporated in the piezoelectric ceramic layers such that the concentration of the metal oxide decreases with distance from the internal electrode layers. Thereby, even in a case where internal electrodes contain Cu as a major component, it is possible to provide a multilayer piezoelectric device which can be obtained by low-temperature firing while ensuring a sufficient piezoelectric constant.
摘要翻译:一种多层压电器件,包括具有交替堆叠的内部电极层和压电陶瓷层的主体。 内部电极层含有Cu作为主要成分,压电陶瓷层含有以Pb(Ti,Zr)O 3为主成分的复合氧化物,含有Nb的金属氧化物(Nb 2 O 5,Sb 2 O 5,Ta 2 O 5,WO 3) 作为五价金属元素和六价金属元素中的至少一种的Sb,Ta或W被并入到压电陶瓷层中,使得金属氧化物的浓度随着与内部电极层的距离而减小。 因此,即使在内部电极含有Cu作为主要成分的情况下,也可以提供能够通过低温烧制获得的多层压电器件,同时确保足够的压电常数。
摘要:
A piezoelectric ceramic composition has the composition formula (Pb(a-b)Meb){(Ni(1-c).d/3Znc.d/3Nb2/3)zTixZr(1-x-z)}O3, wherein Me represents at least one element selected from the group consisting of Ba, Sr and Ca; a, b, c, d, x and z satisfy the inequalities 0.975≦a≦0.998, 0≦b≦0.05, 1
摘要翻译:压电陶瓷组合物具有组成式(Pb(ab)Meb){(Ni(1-c).d / 3Znc.d / 3Nb2 / 3)zTixZr(1-xz)} O3,其中Me表示至少一种元素 选自Ba,Sr和Ca组成的组; a,b,c,d,x和z满足不等式0.975 <= a <= 0.998,0 <= b <= 0.05,1
摘要:
A thick-wall small-diameter high-pressure fuel injection pipe has a spherical seat surface, an annular flange, and a conical surface continued from the seat surface at a connecting end of the pipe. If the pipe is configured so that t (thickness)/D (outer diameter)