摘要:
A downhole source of electrical power for drilling tools is driven by the rotation of a drillstring or, if the drillstring is not rotating, by the rotation of a drilling sub. The source consists of an alternator having a rotor made up of a series of coils that are mounted on, and spaced around the circumference of, a rotating drilling sub, and a stator made up of a multiplicity of permanent magnets also spaced around the circumference of the drilling sub. The stator is mounted on the drilling sub by means of bearings and incorporates a counterweight that holds the rotor relatively stationary with respect to the sub and with respect to the coils, so that rotation of the sub, either by rotation of the drillstring or by rotation of a drill motor in the drilling sub, produces relative rotation of the rotor and stator to generate an AC electrical output. The rotor and stator surround an axial fluid passage through the center of the alternator so that they do not impede the flow of the drilling fluid, and the motor is totally sealed to prevent damage to the bearings. The alternator stator is an annular permanent magnet structure which surrounds the drilling axis, and which may include two sets of rare earth disc magnets spaced axially to form an axial gap, with the counterweight holding the magnets stationary with respect to the alternator coils. The coil structure is also annular and also surrounds the drilling axis, with the coil structure preferably including two sets of offset coils positioned to rotate in the gap between the permanent magnets. The two sets of coils make up a two-phase system; if desired, a single set of coils may be used to provide a single-phase system.
摘要:
A system comprises alternative processing sections for use in the further processing of products. A separator, at which a transport section is divided into several alternative transport sections for the further processing of products in processing stages, is provided. A sensor, that detects the phasing of the products, is located upstream of the separator. A request from the sensor acts on a drive which actuates the separator through a control device. A further sensor, which detects the product phasing, is located on each of the at least two transport sections. This further sensor is connected to a drive for the processing stage served by respective ones of the separate transport sections. The drive of each such processing stage is controlled independently of the drive for the respective transport section by a suitable control unit which takes into consideration the detected product phasing for the associated transport section.
摘要:
The invention relates to a method for reducing register errors on a web of material (04) moving through the printing nip of a multicolor web-fed rotary press, comprising the following steps: providing a portion between an area of the web of material (04) located between the two lateral edges of the web of material (04) and areas in the vicinity of the lateral edges of the web of material with a deformation relative each other in a direction perpendicular to the plane of rotation of the web of material (04) subject to a register error occurring in the direction of rotation of the web of material (04).
摘要:
A cylinder, having a cylindrical body which is rotatable about a cylinder axis of rotation, is usable to process flat material. At least one group of a plurality of tools are distributed around the periphery of the cylinder body in a homogeneous manner. These tools are able to perform a working movement with respect to the cylindrical body and are coupled to a control device which effects that working movement. A first cam plate is traced by the control device of each tool group. A rotatable cover disk is also traced by the control device of each tool group. The cover plate is rotatable and is coupled, for its rotation, to the rotation of the cylinder. The cam plate has a peripheral section that controls the tool working movement, in cooperation with the control device. The control section covers a maximum of 1/n of the periphery of the cam plate, where n is a whole number integer equal to, or larger than 2, in addition to a section that does not control the working movement of the tool group and which constitutes the rest of the cam plate periphery. The cover disk includes a first group of sections of different radii, which are traced by the control device, and which control device also traces the sections of the cam disk during the rotations of the cylinder body. At least one of those cover disk sections has a first radius which enables cooperation between the control device and the cover disk section. At least one other of the sections has a second radius which blocks such cooperation. At least one second group of sectors is also provided on the cover disk and is arranged between two sections of the first group of sectors. The radii of the first sectors and the second sectors are not the same.
摘要:
A processing machine, such as a printing press, is supplied with materials, such as rolls of paper, under the control of a control system. The control system is of a higher order than either of the material supply system and the processing machine. It is connected to both the supply system and the processing machine for transmitting data using signals.
摘要:
A printing unit is comprised of at least two pairs of two cylinders each. The two cylinders in each pair are a transfer cylinder and a forme cylinder. The transfer cylinder and the forme cylinder are each embodied with a width sufficient for printing six newspaper pages arranged axially next to each other. The transfer cylinder of each pair cooperates with a counter-pressure cylinder, that is embodied as a satellite cylinder to form a printing head in a so-called print-in-place arrangement.
摘要:
A device is provided which is usable to draw at least one web of material or at least one web strand, that includes several webs of material, into a folding apparatus. The folding apparatus includes at least an upper structure, at least one folding funnel and a cross cutting device for separating the web of material, which has been transported in the upper structure and folded on the folding funnel, into individual products. At least one guide rail is provided. A holding part with a guiding end of at least one web of material fixed thereto, is displaceably guided on a path of web travel of the web through the upper structure. At least one guide rail is provided along the folding funnel.
摘要:
An injection molding machine includes an injection pot with an injection nozzle and a side casting port for feeding a material into the pot. The tip part of a plunger disposed in the pot is formed in such as shape that the tip part of the injection pot can be generally filled with the material after an injection is completed. A fitting part pressingly cuts off the material from the feeder by allowing a boundary part between the plunger body and its tip to be formed at a corresponding part between the injection pot body and its tip part. When the tip of the plunger is inserted into the tip of the injection pot, a clearance S is formed between the tip parts and the feeding port is opened to the fitting part, whereby the injection molding machine is capable of performing the assured pressing cutting off and excellent injection of plastic rubber in the injection pot and effective removal of residual rubber with fewer injection cycles, and is capable of providing a higher production efficiency and excellent strength.
摘要:
A portable resilient action exercise platform 10 permits the user to jog in place when indoors and provides an increasing resistance to deformation as the amount of deformation of the platform increases. A support assembly including a spaced array of flexible user selectable and replaceable resilient supporting blocks 12 provides a variable amount of support for the exercise platform so that the rebounding action of exercise platform 10 can be varied. Platform 10 preferably includes a spaced array of flexible user-replaceable resilient supporting blocks 12 to absorb the impact of the user's footfalls or movements, and is preferably constructed of strong, flexible structural polymer supported, preferably, by eight or nine resilient flexible user-replaceable foam supporting blocks 12, each preferably comprising a closed cell foam support of selected durometer.
摘要:
A dryer is used for drying a web of material. The dryer includes a passage duct for the material web. Drying takes place within this passage duct which includes at least one straight section. The dryer is disposed on a printing group which includes vertical web guidance. The passage duct straight section is essentially horizontal and receives the web of material delivered to it by the printing group. The passage duct is comprised of at least two sections through which the web of material travels in opposite directions.