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JP2604362B2 |
A low pulsation pump device (10) has a pulse motor (1), two plungers (7, 8) adapted to be driven by the pulse motor, a pressure sensor (9) disposed on the output side of the plungers, a storage (6) for storing values of pressures detecte...
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JPH09100988A |
To provide a water hammer preventing device that can satisfactorily absorb pressure wave generated by water hammering, hardly generating pulsation. A water hammer preventing device has a cylinder 3 for connecting an opening end part 1 to...
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JPH0979151A |
To reduce suction gas and pulsation of delivery pressure, and equalize winding finish positions of laps of both fixed and swinging scrolls by specifying a winding start angle from the center of a lap of a swinging scroll and a winding fi...
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JPH0968167A |
To prevent reduction in particle filtering efficiency of a filter by eliminating pulsation of discharged chemicals in a bellows pump for liquid supply. This device is provided with two cylinders 8a, 9a for actuating two bellows 5, 6 inde...
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JPH0968156A |
To reduce a generating level of a pulsation of fluid, by connecting first/second centrifugal pumps to a tank through a pipe, and controlling a phase of rotation of each centrifugal pump in accordance with a measuring signal from the firs...
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JPH0960785A |
To effectively reduce the pulsation of pressure oil even when the revolving speed of a hydraulic pump is changed under any operating conditions by adjusting the shift position of a reflector based on the data calculated by a pump revolvi...
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JP2526880Y2 |
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JP2585977B2 |
PURPOSE: To provide a pressure pulsation damper for vehicle fuel pump capable of damping output fuel pressure pulsation and reducing an audible noise from a pump. CONSTITUTION: This damper 80 is a pipe 82 which is tightened at its end pa...
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JP2526677Y2 |
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JPH0942576A |
To provide a pressure oil pulsation reduction device which can reduce pulsation in the range of both frequencies of odd number times and even number times as much as a specified frequency. In a pressure oil pulsation reduction device red...
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JPH0942159A |
To prevent backflow (partial backflow) at both discharge and suction sides from occurring as well as to reduce the pulsation. A pump tube is installed in space between a guideway 10 formed on an inner surface of a casing 1 and a roller 4...
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JPH0933000A |
To provide soundness of an agitating system by preventing the occurrence of a vacuum part and a water hammer in an agitating line. Outlet piping 7 is connected to the bottom of a liquid storage tank 1 and a pump 2 is connected to the out...
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JPH0932722A |
To prevent the occurrence of cavitation by feeding the drain discharged from an attemperator to the attemperator drain suction port of the ejector that has been fitted to the suction side of a water-sealed vacuum pump through an attemper...
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JP2577060B2 |
A feed pump, preferably for anti-skid brake systems, having at least one shaft-driven pump piston and at least one compensation element. Some of the brake fluid fed by the pump piston into the brake system during the compression stroke i...
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JPH08338387A |
PURPOSE: To reduce a pulsation noise and a wind cutting sound securely, by forming the form of the opening of a suction port or a discharge port in the rotor diameter direction formed to a casing, obliquely to cross the ridge line of the...
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JPH08512375A |
A two stage pump has coaxial first and second stage reciprocating pumps with the second stage piston reciprocably driven by the first stage piston. Multiple sets of first and second stage pumps are provided, and the second stage pistons ...
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JPH08338386A |
PURPOSE: To obtain a screw compressor which can reduce a noise depending on a discharge pulsation securely. CONSTITUTION: In a screw compressor 1 in which a pair of screw form rotors 3 and 4 are rotated in a casing 2, and a fluid sucked ...
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JP2564588B2 |
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JPH08334096A |
PURPOSE: To prevent reduction in compression capacity by a muffler without exerting influence on a compression space even if a part of compressed refrigerant gas remains in the muffler by arranging a noise reducing mechanism (the muffler...
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JPH08334095A |
PURPOSE: To enhance a noise eliminating effect by a muffler without enlarging a compressor itself. CONSTITUTION: A motor driven element 3 and a rotary compressing element 5 to be driven by the motor driven element 3 are housed in a seale...
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JP2562844B2 |
A circumferential flow type fuel pump in which an impeller (42) is rotated by engaging a hole (42b) disposed on the impeller (42) with a rotating shaft (3a) having a diameter smaller than that of the hole (42b), wherein the center Q of t...
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JPH08326681A |
To supply a micro quantity of fluid flow substantially without pulsation by comparing a flow signal related to flow generated by a pump, with a reference flow signal, and adjusting load to the pump according to a difference signal. Flow ...
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JPH08326678A |
PURPOSE: To balance the static weight of the whole of a compressor in the installing condition of an external attached device so as to reduce vibration and noise at the time of operation by applying a load by which the static weight can ...
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JPH08326702A |
PURPOSE: To prevent permanent compression strain in an elastic body from remaining by equally distributing the stress applied to the elastic body of an accumulator by an operating diaphragm. CONSTITUTION: An accumulator 50 divides the ro...
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JP2559414B2 |
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JPH08319937A |
PURPOSE: To reduce the occurrence of pulsation during a no-load work by a hydraulic pump and to execute a hydraulic work during a load work without any trouble by a method wherein an adjusting valve for reducing the occurrence of pulsati...
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JPH08312525A |
PURPOSE: To provide a hydraulic pulsation absorber simple in structure and capable of reducing cost. CONSTITUTION: A storage 6 communicated to a hydraulic pressure flow passage 5 is provided in a discharge port block 3 of a hydraulic pum...
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JP2555318B2 |
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JP2556039B2 |
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JP2552654B2 |
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JPH08286767A |
PURPOSE: To provide a liquid chemicals injecting quantity controller improved in a pulsation response to set quantity and suitable for process control. CONSTITUTION: A first timer 100 gives the notice of first time width in accordance wi...
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JP2515639Y2 |
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JPH08284809A |
To provide a pumping system capable of freely adjusting constant flow. This pumping system is composed of pumping units P1-Pn connected to n tanks by unidirectional valves V1-n; a collecting head CH receiving fluids from the pumping unit...
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JP2515031Y2 |
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JP2514019Y2 |
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JPH08261141A |
PURPOSE: To prevent increasing vibration and noise according to increasing power even in the case of attaing increasing power of an oil hydraulic pump, by providing pistons, slidably synchronized with a delivery pressure respectively of ...
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JP2512178Y2 |
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JPH08246809A |
PURPOSE: To replace water supply in a water supply system with other water supply even under the state that a water supply pump driving turbine looses driving steam. CONSTITUTION: A booster pump 5a and a water supply pump 6a are arranged...
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JP2535425B2 |
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JP2532046B2 |
PURPOSE: To obtain simple detergent feeders that can constantly add an accurate specified volume of liquid detergent to a washing solution. CONSTITUTION: A detergent feeder comprising a detergent feed passage 30 equipped with a feed pump...
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JPH08232903A |
To provide a noise reducer for effectively controlling the propagation noises of a fluid even when operated under wide pressure, speed and displacement volume. A noise reducer 34 is provided for reducing the propagation noises of a fluid...
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JPH08219363A |
PURPOSE: To heighten pulsation absorbing effect by always obtaining diaphragm reaction corresponding to fed liquid pressure in order to absorb pulsation in a diaphragm type pulsation absorber making use of air pressure. CONSTITUTION: A p...
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JP2519611B2 |
PURPOSE: To prevent a crankshaft from being long sized and to reduce a bending stress or twisting stress exerted on the crankshaft by shifting the central positions of respective suction ports and discharge ports arranged in a transverse...
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JP2505279Y2 |
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JPH08177723A |
To reduce fluid-borne noise generated in a hydraulic system having a hydraulic pump. A fluid-borne noise attenuation device 34 is provided with a device detecting the pulsation of a flow generated by a hydraulic pump 12 and a device outp...
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JPH08177776A |
PURPOSE: To reduce a noise (a flowing sound) of a fluid pulsation component by forming the passage area of a delivery port larger than the passage area of a pump passage in a Westco pump having an impeller which is arranged in a pump cas...
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JPH08170584A |
PURPOSE: To eliminate pulsation of discharge rate in a simple structure, and to discharge a fixed quantity of liquid with high pressure in proportion to the rotating speed. CONSTITUTION: A quantitative discharge device 100 comprises two ...
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JPH08145272A |
PURPOSE: To perform proper absorption of a pressure wave by a method wherein inflow of a pressure wave to the interior of a water chamber is rendered rapid as a venturi effect is improved and contraction of a water chamber consisting of ...
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JP2500448Y2 |
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JP2503804B2 |
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