摘要:
A device for cavitation treatment of a liquid fuel comprises a chamber (1) provided with an inlet socket (2), on which is mounted a by-pass valve (25), and with an outlet socket (4). The chamber (1) contains two coaxially mounted jet emitters (9, 10) of ultrasonic vibrations, each of them consisting of two blades (11, 12) in the form of Archimedes screw mounted on a base (13) and, by the internal surface (14) of one blade (11) and by the external surface (15) of the other blade (12), forming nozzles (16). One of the jet emitters (9) is rigidly secured in the chamber (1) on the same side as the outlet socket (4). The second jet emitter (10) faces by its blades the first jet emitter (9) and is mounted movably in relation to that emitter (9). The blades (11, 12) of the second jet emitter (10) are located between the blades (11, 12) of the first jet emitter (9) so as to overlap its nozzles (16).
摘要:
The invention relates to a vibration damper (1) configured to be provided on a low frequency sound generator, which comprises a feeder unit (2) with a positive feedback system regulated by a reciprocating spring loaded piston (3) and a resonator tube (4). The vibration damper (1) may be positioned outside the resonator tube (4). The vibration damper (1) comprises a first flange (5) connected to the resonator tube (4), a number of springs (6), a second flange (7) and a number of weights (8).
摘要:
A method and apparatus for reducing acoustic noise waves in the vicinity of an electrically conductive plasma, such as in the exhaust of a gas turbine engine, having a sensor to detect the noise wave and generate a representative electrical noise signal; a signal analyzer to analyze the noise signal, a wave form generator to generate a phase inverted, electrical interference signal based on the noise signal, an amplifier, a time delay, an error corrector; and an applying means to conduct the electrical interference signal to the plasma causing the plasma to generate a pulsating interference wave to cancel the acoustic noise wave.
摘要:
The invention concerns an electro-aero-acoustic source (2), set in a flow (V) or beside a flow, consisting of electrodynamic or electromagnetic motor means (5) generating a reciprocating motion, and a member (3) coupled to the motor means (5), and obstructing the flow so as to exert a dynamic action on said flow. Said source can be used to produce an electro-aero-acoustic system for active noise control, in particular in a confined flow.
摘要:
Air-driven, low-frequency sound generator with a positive feedback system, comprising, as a sound emitter, an open resonator (11) for the generation of standing gas-borne sound waves which produce a varying gas pressure inside the resonator; and feeder (10) with a tube (14) for the supply of pressure gas to the resonator and a back and forth movable springing valve slide (15) whose position remains unaffected by the pressure gas and which regulates the gas flow from the tube while creating a modulated flow of pressure to the resonator. The tube is surrounded by a surge tank (13), connected to the pressure gas source, and the valve slide is arranged as a piston movable inside the tube and is set to regulate a connecting opening (20) between the surge tank and the inside of the tube. This opening is situated at one end surface (19) of the piston and said end surface is being exposed to the inside of the resonator by means of the one end of the tube communicating therewith.
摘要:
Группа изобретений относится к гидродинамическим системам и может быть использована в областях промышленности, применяющих пульсирующий режим течения жидкости. В способе генерирования колебаний жидкостного потока жидкость из напорной магистрали (11) предварительно разделяют на два потока снаружи вихревой камеры (1), внутри нее их закручивают с помощью каналов с разными скоростями в противоположных направлениях и при этом разделяют с помощью перегородки (4) со сквозным каналом (5). Поток с большей скоростью закручивают с помощью каналов закрутки (2). Поток с меньшей скоростью закручивают с помощью каналов закрутки противоположной ориентации (3) и связывают через канал (9) с полостью с регулируемой упругостью (8), закрытой герметичной эластичной оболочкой (10) и установленной в трубе (7) вдоль ее длины. В результате упругого взаимодействия жидкость в канале (9) получает импульс, направленный в вихревую камеру (1), с помощью которого происходит резкое торможение закрученных потоков и импульсное увеличения расхода через выходное сопло (6). Изобретение направлено на повышение эффективности преобразования постоянного потока жидкости в пульсирующий поток за счет снижения гидравлических потерь и потребляемой гидравлической энергии.
摘要:
The invention relates to methods for producing acoustic and ultrasonic resonance oscillations in liquid and gas flows and can be used in various industries for carrying out highly efficient and deep emulsion, regeneration, polymerisation, dispersion and homogenisation processes and for mass and heat-exchange processes. The aim of said invention is to obtain a wide range of phase-frequency characteristics during a highly intensive liquid or gas processing by means of resonance oscillations occurring when an inlet stream passes a closed space in an opposite direction with respect to an outlet stream at an angle ranging from 1 DEG to 45 DEG , thereby producing an additional pulsation of treated liquid or gas streams due to the fact that said inlet and outlet streams move in a closed space according to a sinusoidal or sawtooth trajectory.
摘要:
The description relates to a device for actuating a hydrostatic drive (1) with a periodically operable on-off valve (2) which connects a resonant pipe (4) connected to the hydrostatic drive (1) to generate standing pressure waves in the hydraulic medium alternately to a pressure supply line (5) and a return line (6). In order to create favourable control conditions it is proposed that the resonant pipe (4) have a pressure outlet (7) at an oscillation node of the standing pressure waves and the switching times of the on-off valve (2) be controllable at a constant switching frequency.
摘要:
The invention concerns a method for producing selectively controlled pressure pulses in a mass of gas (1), in particular contained in a space (27) of large dimensions. In order to achieve a sufficiently high power in the pulses these are generated by a valveless displacement machine (2), in which the pressure when the machine (2) opens towards its outlet port, differs from the pressure of the mass of gas. The pulse is generated as the working fluid, due to said pressure difference, at high velocity flows through the outlet port (23). An acoustic power of the generated pulses of up to 20 kW can be attained by the method. The invention also concerns a device for performing the method.
摘要:
A pulsating aerial vibration wave generating device capable of generating hard−to−damping pulsating aerial vibration waves with distinct ON and OFF of air, and making it difficult for the device itself to cause vibration while the pulsating aerial vibration waves are generated, comprising a pulsating aerial vibration wave generating device body (2) having a cylindrical hollow part (R2) with two air flow holes and a rotary body rotatably installed in the hollow part (R2) and having an outer peripheral surface side (S4c) allowed to slide on an inner peripheral surface (S2c) forming the hollow part (R2).