619results about "Vibration cleaning" patented technology

Fouling of heat exchange surfaces is mitigated by a process in which a mechanical force is applied to a fixed heat exchanger to excite a vibration in the heat exchange surface and produce shear waves in the fluid adjacent the heat exchange surface. The mechanical force is applied by a dynamic actuator coupled to a controller to produce vibration at a controlled frequency and amplitude output that minimizes adverse effects to the heat exchange structure. The dynamic actuator may be coupled to the heat exchanger in place and operated while the heat exchanger is on line.

A thermal management system is provided herein. The system comprises a substrate (141), a synthetic jet ejector (103), and a vibration isolation element (107) adapted to releasably engage said synthetic jet ejector and said substrate.

A thermal module includes a base, a plurality of fins installed on the base, and a vibrational device installed on the base for vibrating the plurality of fins so as to remove dust from the plurality of fins. An electronic device includes a housing, and a thermal module installed inside the housing. The thermal module includes a base, a plurality of fins installed on the base, and a vibrational device installed on the base for vibrating the plurality of fins so as to remove dust from the plurality of fins.

A driving method causes a vibrator to generate standing waves different in order with a predetermined time phase difference. The vibrator has a first vibration mode that plural nodal lines are arranged in a first direction, a second vibration mode that number of first-direction nodal lines is different from that in the first vibration mode and its natural frequency is higher than that of the first vibration mode, and a third vibration mode that its natural frequency is between those of the first and second vibration modes. The vibrator is driven on condition that excitation force to one of the first and second vibration modes that a difference between its natural frequency and the natural frequency of the third vibration mode is smaller is made larger than that to the other thereof that a difference between its natural frequency and the natural frequency of the third vibration mode is larger.

A device is coupled to a heat exchanger for mitigating fouling by applying a mechanical force to a fixed heat exchanger to excite a vibration in the heat exchange surface and produce shear waves in the fluid adjacent the heat exchange surface while the heat exchanger is in operation. An electromagnetic driven impulse device induces vibration onto heat exchanger tubes and/or an acoustic wave through the liquid service fluid to reduce fouling. The device can be mounted directly onto the outer part or piping and produces acoustical/vibrational modes onto the tube or near the surface of tubes.

A method of cleaning sludge from the tube sheet (34) of a nuclear steam generator (10) includes introducing a moveable sludge lance (76) said moveable sludge lance having duel lance heads (77) through handholes (62) in the side of the generator and into a central tube lane (60) having a central stay rod (61) and sludge lancing with high pressure fluid through the row 1 tubes (85) in the tube lane, where the distance (200) between the dual lance heads (77) is wide enough to allow the dual lance heads to extend beyond the central stay rod (61).

A method includes calculating, using a processor, an impedance or forward and reflected power coefficients of a phased system including a plurality of actuators disposed on a structure; and activating the plurality of actuators disposed on the structure to produce shear stress via ultrasonic continuous wave activation to at least one of delaminate or weaken an adhesion strength of a contamination on the structure.

An on-line method and a device for cleaning of contamination such as caking or slag deposits from surfaces in vessels and combustion installations by means of blasting technology. An explosive gas mixture is made to detonate in the proximity of the deposits and thereby clean the deposits from the surfaces.

An apparatus enhances the condensation and boiling of a fluid in heat exchange machines, by directly applying time-periodic acoustic waves with a resonance oscillation frequency to liquid drops and/or bubbles formed on a solid surface, when the fluid is in the process of condensation or boiling, thereby effectively removing them therefrom. The apparatus comprises a signal generator for generating a driving signal based on a resonant oscillation frequency of at least one of the liquid drops and the bubbles; and a vibrator, in response to the driving signal, for providing an acoustic pressure wave to said at least one of the liquid drops and the bubbles, to thereby detach them from the solid surface.

A heat-dissipation device having a dust-disposal mechanism for removing dust from cooling metallic fins is provided, which includes a heat-conducting module and a dust-disposal mechanism. The heat-conducting module has a plurality of metallic fins arranged in the same direction and apart with a gap formed therebetween. The dust-disposal mechanism has a cleaning unit corresponding to the metallic fins so as to insert into the gap between the metallic fins and clear or absorb the dust accumulated on the metallic fins, thereby enhancing the cooling efficiency of the heat-conducting module.

A heat-dissipation device with dust-disposal function for removing dust from cooling metallic fins is provided, which includes a heat-conducting module and a vibrator. The heat-conducting module has a plurality of metallic fins, and the vibrator is directly or indirectly connected to the heat-conducting module to provide a vibrating source for the metallic fins, such that the dust accumulated on the metallic fins is shook off by vibration. The vibrator may be a piezoelectricity element or an eccentric motor. In addition, the vibrator may be an ultrasonic generator disposed near the heat-conducting module to provide a non-contact vibrating source for the metallic fins.

A system and associated method for removing accumulated debris from a surface of a vessel. The system includes an impulse cleaning device defining a combustion chamber in which combustible fuel and air are mixed and ignited to produce combustion that is directed at the surface to be cleaned within the vessel, and an eductor assembly surrounding a downstream end of the chamber for inducting surrounding atmosphere into the combustion to widen the area being cleaned.

A method for reducing the formation of deposits on the inner walls of a tubular heat exchanger through which a petroleum-based liquid is flowing comprises applying one of fluid pressure pulsations to the liquid flowing through the tubes of the exchanger and vibration to the heat exchanger to effect a reduction of the viscous boundary layer adjacent the inner walls of the tubular heat exchange surfaces. Reduction of the viscous boundary layer at the tube walls not only reduces the incidence of fouling with its consequential beneficial effect on equipment life but it also has the desirable effect of promoting heat transfer from the tube wall to the liquid in the tubes. Fouling and corrosion are further reduced by the use of a coating on the inner wall surfaces of the exchanger tubes.

A thermal management system (101), comprising (a) a synthetic jet actuator (103), and (b) a processor (107) in communication with the synthetic jet actuator, the processor being adapted to receive programming instructions, and being further adapted to modify the operation of the synthetic jet actuator in response to the programming instructions.

The invention provides an internal descaling and external defrosting novel air conditioner applying ultrasonic oscillators. The internal descaling and external defrosting novel air conditioner comprises an outdoor unit and an indoor unit. The outdoor unit and the indoor unit are connected through a pipeline. The indoor unit comprises the indoor ultrasonic oscillators and an indoor heat exchanger, wherein the indoor ultrasonic oscillators are located around the indoor heat exchanger. The indoor heat exchanger is a shell and tube heat exchanger and comprises fins, U-shaped pipes, an air inlet pipe, process reinforcement tubes, a liquid outlet pipe and bridging elbows. Each U-shaped pipe comprises two free ends extending in the same direction in parallel, and a bent part located between the two free ends, wherein the free ends are inserted in the corresponding fins. Ports of the free ends of every two adjacent U-shaped pipes are connected through the corresponding bridging elbow. The outdoor unit comprises a capillary tube, a compressor, an outdoor heat exchanger, the outdoor ultrasonic oscillators, a four-way valve, air-liquid separators, a filter and a check valve, wherein the outdoor ultrasonic oscillators are located around the outdoor heat exchanger. By means of the internal descaling and external defrosting novel air conditioner, ultrasonic non-stop on-line internal descaling and external defrosting can be achieved, the stable running environment of the air conditioner is ensured, and the service life is prolonged.

An apparatus for cleaning a surface within a vessel has an elongate combustion conduit extending from an upstream end to a downstream end. The downstream end is associated with an aperture in the wall of the vessel and is positioned to direct a shockwave toward the surface. At least one hanger supports the combustion conduit at least one location along a length of the combustion conduit. A penetration conduit is positioned between the wall aperture and an associated portion of the combustion conduit. Means couple the combustion conduit to the penetration conduit so as to accommodate relative longitudinal movement and/or relative angular movement.

Disclosed herein is a segmental ultrasonic cleaning apparatus configured to remove scales and/or sludge deposited on a tube sheet. The segmental ultrasonic cleaning apparatus includes a plurality of segment groups arranged in a ring shape on a top surface of a tube sheet along an inner wall of the steam generator, in which each of the segment groups includes an ultrasonic element segment and a guide rail support segment loosely connected to each other by metal wires through hand holes located at a lower portion of the steam generator, such that ultrasound waves radiated from an ultrasonic transducer in each of the ultrasonic element segments travels along the surface of the tube sheet, with the segment groups tightly connected in the ring shape by tightening the metal wires via wire pulleys of flange units.

A heat sink and method for using the same for use in cooling an integrated circuit (IC) chip is provided herein. The heat sink includes a manifold block, a liquid-filled cooling system, and a compliant foil affixed to the manifold block and backed by a liquid in the closed loop cooling system. The pressure provided by the liquid behind the foil causes the foil to bow, and to conform to non-planarities in the surface of the IC chip, thus reducing air gaps and increasing thermal coupling between the IC chip and the heat sink.

An intelligent control method for scale-prevention and scale-removal of an ultrasonic scale-prevention and scale-removal device can make the device be in the best operation state, reduces energy consumption of a whole scale-prevention and scale-removal system, prolongs the service life of the device, and improves safety stability. The intelligent control method comprises the steps that the ultrasonic scale-prevention and scale-removal device is composed of an ultrasonic frequency generating device and an electro-mechanical transformation device, a microcomputer control system is composed of a detecting unit, a control unit and a monitoring unit, the electro-mechanical transformation device is perpendicularly arranged on a tube plate of a site heat exchange device, the detecting unit detects parameters of the site heat exchange device in real time, the control unit controls output power of the whole scale-prevention and scale-removal system according to the parameters of the site heat exchange device and control procedures, the monitoring unit monitors output voltage U, an output current I and driving frequency f of the ultrasonic scale-prevention and scale-removal device, the operation state of the ultrasonic scale-prevention and scale-removal device is judged, normal operation or breakdown/halt is displayed, and an alarm signal is given when breakdown occurs.