Abstract: A power generating device according to the present invention has a positive displacement steam expander for converting expansion of steam into a rotational force, a power generator connected to a rotational axis of the positive displacement steam expander, an inverter for setting an operational frequency of the power generator, a power detector for detecting generated electric power of the power generator, and control means for changing set frequency of the inverter in accordance with a deviation of the generated electric power detected by the power detector from a target value. According to such a configuration, it is possible to sustain high output of the power generator irrespective of a differential pressure between primary side steam and secondary side steam.

Abstract: A screw compressor is disclosed wherein a pair of rotor shafts are disposed horizontally and an oil sump is formed at the bottom of a bearing casing which accommodates bearings for supporting the rotor shafts, a bearing lower portion being soaked into oil present in the oil sump for lubrication. The screw compressor comprises a chamber provided separately from the bearing casing, an oil line for communication between the oil sump in the bearing casing and the chamber and oil level detecting means disposed in the chamber. According to this structure, the oil level in the bearing casing can be checked accurately and there is no fear of oil shortage in the bearings.

Abstract: A water-lubricated compressor is disclosed, in which a discharge on-off valve is disposed in a discharge channel located between a discharge port of a compressor body and a water separating/recovering unit and a water circulation on-off valve is disposed in a water circulation channel located between a water cooler and a water supply portion in the compressor body, while a gas release channel is formed to provide communication between a gas phase portion of the water separating/recovering unit and the exterior of the water separating/recovering unit and a gas release on-off valve is disposed in the gas release channel. When the compressor body is not in operation, the discharge on-off valve and the water circulation on-off valve are closed and the gas release on-off valve is opened, allowing water present within the water cooler to be recovered to the water separating/recovering unit through the water circulation channel.

Abstract: In a screw for extruder, a bearing segment having a function of supporting a screw main body at an intermediate part when kneading is performed is provided at a position corresponding to a kneading portion or on the downstream side of the kneading portion. The bearing segment is provided with at least two flights having a sectional shape of a complete meshing type with one streak in the axial direction, the flights are arranged in the rotational direction with uniformly displacing a phase thereof respectively, and length of the flights in the axial direction is set to 0.2D (D: rotational outer diameter of the bearing segment) or more. According to the above configuration, bending of the screw main body is prevented and abrasion of the flights and a barrel is suppressed.

Abstract: A power generating device according to the present invention has a positive displacement steam expander for converting expansion of steam into a rotational force, a power generator connected to a rotational axis of the positive displacement steam expander, an inverter for setting an operational frequency of the power generator, a power detector for detecting generated electric power of the power generator, and control means for changing set frequency of the inverter in accordance with a deviation of the generated electric power detected by the power detector from a target value. According to such a configuration, it is possible to sustain high output of the power generator irrespective of a differential pressure between primary side steam and secondary side steam.

Abstract: A groove is provided in the periphery of a pressure receiving area of a pressure receiving surface opposing to the load of axis weight within a bearing surface supporting an axis, and a liquid supply route communicating with the groove is provided so that liquid is supplied to the groove through the liquid supply route. In such a configuration, a bearing having a simple structure and a high compact load capacity and a liquid cooling type screw compressor using the above bearing are provided.

Abstract: In a compressor bearing for supporting a rotor shaft of a compressor, a first oil groove is formed in a bearing surface on the side opposite to a bearing load acting direction, a second oil groove is formed in a position adjacent to the first oil groove in an anti-rotational direction, a first oil channel and a second oil channel communicating with the first oil groove and the second oil groove, respectively, to supply oil to the first and second oil grooves from an exterior, common oil supply source are provided, a circumferential length of the second oil groove is set larger than that of the first oil groove, and a minimum value of a sectional area perpendicular to the longitudinal direction of the second oil channel is set smaller than that of a sectional area perpendicular to the longitudinal direction of the first oil channel. The compressor bearing of such a configuration is small in load induced by oil pressure and exhibits an outstanding rotor shaft cooling effect.

Abstract: The present invention relates to a silencer easily cleanable inside. This silencer comprises a casing cylinder and a segment member housed in the casing cylinder to constitute a sound reducing means. The silencer further comprises a segment member fastening means for fastening the segment member to the casing cylinder, a gas inlet-side lid plate with a punched hole, which closes an opening at one end of the casing cylinder, and a gas outlet-side lid plate with a punched hole, which closes an opening at the other end of the casing cylinder. At least either one of the gas inlet-side lid plate or the gas outlet-side lid plate is adapted to be detachable from the casing cylinder.

Abstract: A deposit removing device capable of efficiently removing deposit on a plate-like member such as a metal plate or resin plate by reducing a spacing distance between the plate-like member and an injection nozzle, and also capable of coping with the removal of deposit on the plate-like member rolled or conveyed at a high speed. This deposit removing device removes the deposit adhered to the plate-like member (T) by jetting compressed air from at least one jetting hole (101) of a nozzle body (100) in which the at least one jetting hole (101) is formed. This device is configured so that the nozzle body (100) is supported so as to be movable in a direction (W1) substantially perpendicular to the surfaces (T1 and T2) of the plate-like member (T).

Abstract: A bearing comprising a resin layer, a backing strip and an intermediate layer which bonds the resin layer and the backing strip to each other is disclosed. The bearing undergoes a force from the resin layer side. A corrosion preventing layer is formed on each side face of the bearing so as to cover the intermediate layer. The corrosion preventing layer prevents the intermediate layer from being corroded by gas contained in an atmosphere and lubricating oil which are present around the bearing.

Abstract: In a bearing constituted by a plural-layer slide member, the plural-layer slide member comprises a resin layer of polytetrafluoroethylene as a slide member and a backing strip to which the resin layer is bonded. A fitting hole having a depth exceeding the thickness of the resin layer is formed from the resin layer side. A temperature measuring metallic member formed of a white metal is fitted in the fitting hole. A temperature sensor is positioned within the temperature measuring metallic member. This bearing permits an accurate detection of its temperature. Further, in an oil cooled screw compressor having a bearing lubricating oil supply pipe, a slide surface of the bearing is covered with polyether ether ketone. Even if foaming occurs in the oil, it is possible to prevent the occurrence of a mechanical trouble such as galling.

Abstract: An oil-cooled screw compressor which can maintain the discharge temperature of discharge gas at an appropriate level is provided. The oil-cooled screw compressor comprises a compressor body, an oil separation/recovery unit disposed in a discharge path extending from a discharge port of the compressor body, and an oil feed path extending from the oil separation/recovery unit and communicating with the compressor body 12. The oil feed path is branched at an intermediate position thereof into a first feed path portion and a second feed path portion. An opening/closing valve is disposed in the first feed path portion, a pressure gauge is disposed in the discharge path, and a control unit is provided to control opening and closing of the opening/closing valve on the basis of a correlation between a discharge pressure detected by the pressure gauge and a predetermined pressure.

Abstract: In a bearing constituted by a plural-layer slide member, the plural-layer slide member comprises a resin layer of polytetrafluoroethylene as a slide member and a backing strip to which the resin layer is bonded. A fitting hole having a depth exceeding the thickness of the resin layer is formed from the resin layer side. A temperature measuring metallic member formed of a white metal is fitted in the fitting hole. A temperature sensor is positioned within the temperature measuring metallic member. This bearing permits an accurate detection of its temperature. Further, in an oil cooled screw compressor having a bearing lubricating oil supply pipe, a slide surface of the bearing is covered with polyether ether ketone. Even if foaming occurs in the oil, it is possible to prevent the occurrence of a mechanical trouble such as galling.

Abstract: A oil-cooled type screw compressor of the present invention includes a compressor main unit storing a pair of male and female screw rotors driven by a motor and meshing with each other, a cooling fan provided independently to the motor for blowing air toward the motor, and control means for receiving a detected temperature signal from a temperature detector for detecting the coil temperature of the motor, and conducting control for increasing/decreasing the fan rotation speed of the cooling fan according to the coil temperature so as to maintain the coil temperature within a permissible range. It is possible to use the coil current of the motor or the motor rotation speed and the discharge pressure in place of the detected temperature signal. This constitution provides a screw compressor which offers fan-removed heat quantity not excessive or insufficient with respect to the motor heat generation quantity, and realizes sufficient cooling for the motor, and energy saving.

Abstract: The present invention relates to a silencer easily cleanable inside. This silencer comprises a casing cylinder and a segment member housed in the casing cylinder to constitute a sound reducing means. The silencer further comprises a segment member fastening means for fastening the segment member to the casing cylinder, a gas inlet-side lid plate with a punched hole, which closes an opening at one end of the casing cylinder, and a gas outlet-side lid plate with a punched hole, which closes an opening at the other end of the casing cylinder. At least either one of the gas inlet-side lid plate or the gas outlet-side lid plate is adapted to be detachable from the casing cylinder.

Abstract: A bearing comprising a resin layer, a backing strip and an intermediate layer which bonds the resin layer and the backing strip to each other is disclosed. The bearing undergoes a force from the resin layer side. A corrosion preventing layer is formed on each side face of the bearing so as to cover the intermediate layer. The corrosion preventing layer prevents the intermediate layer from being corroded by gas contained in an atmosphere and lubricating oil which are present around the bearing.

Abstract: In a bearing constituted by a plural-layer slide member, the plural-layer slide member comprises a resin layer of polytetrafluoroethylene as a slide member and a backing strip to which the resin layer is bonded. A fitting hole having a depth exceeding the thickness of the resin layer is formed from the resin layer side. A temperature measuring metallic member formed of a white metal is fitted in the fitting hole. A temperature sensor is positioned within the temperature measuring metallic member. This bearing permits an accurate detection of its temperature. Further, in an oil cooled screw compressor having a bearing lubricating oil supply pipe, a slide surface of the bearing is covered with polyether ether ketone. Even if foaming occurs in the oil, it is possible to prevent the occurrence of a mechanical trouble such as galling.

Abstract: The oil-cooled type compressor 1A houses therein an inspecting flow passage 19 branched from a discharge flow passage 12 on the secondary side of an oil separation recovering portion 14 and joined with a suction flow passage 11 which is a lower pressure portion than the branched point, and an oil separating element 22 capable of capturing finer oil particles as compared with an oil separating element 15 within the oil separating recovering portion 14, and houses therein an oil droplet detection means 23 for outputting a signal electrically showing a state change upon receipt of oil droplets dropped from the oil separating element 22, being provided with an oil separation detector 21 interposed in the inspecting flow passage 19, and a calculating portion 24 for receiving an electric signal from the oil droplet detection means 23 to calculate the percentage content of oil of the compressed gas from the interval of the electric signal to output it.

Abstract: An extruder driving apparatus is provided in which a speed change gear mechanism is disposed in a position allowing the speed change gear mechanism to rotate at a much lower rotational speed, whereby a noise level is reduced and a seizing trouble is more surely avoided. The extruder driving apparatus comprises a main motor; a planetary gear mechanism including a torque input portion driven by the main motor and outputting a driving force after reducing a rotational speed of the main motor; an output distributing gear mechanism for distributing a driving force from an output portion of the planetary gear mechanism to a plurality of rotor drive shafts arranged parallel to each other; coupling units for connecting one ends of the rotor drive shafts to a plurality of rotors disposed on the extruder side; and thrust bearings for supporting the other ends of the rotor drive shafts to bear thrust forces imposed from the rotors.

Abstract: A oil-cooled type screw compressor of the present invention includes a compressor main unit storing a pair of male and female screw rotors driven by a motor and meshing with each other, a cooling fan provided independently to the motor for blowing air toward the motor, and control means for receiving a detected temperature signal from a temperature detector for detecting the coil temperature of the motor, and conducting control for increasing/decreasing the fan rotation speed of the cooling fan according to the coil temperature so as to maintain the coil temperature within a permissible range. It is possible to use the coil current of the motor or the motor rotation speed and the discharge pressure in place of the detected temperature signal. This constitution provides a screw compressor which offers fan-removed heat quantity not excessive or insufficient with respect to the motor heat generation quantity, and realizes sufficient cooling for the motor, and energy saving.