134 results about "Annular fin" patented technology

A thermowell assembly (20) shown in FIG. 2 is positioned in a pipeline (10) for sensing the temperature of the fluid medium in the pipeline (10) for transmitting the sensed temperature to a meter (12). A temperature sensing probe is received within a temperature conducting tube (36) forming a thermowell and having a plurality of annular fins (40) extending thereabout. In the embodiments of FIGS. 1-7, a liquid (50) is provided in an annular space between the thermocouple (28) and the temperature conducting tube (36). Non-metallic members (70, 74, 80) are positioned between the pipeline (10) and the temperature transmitting tube (36) to isolate thermocouple (28) from ambient changes in the temperature of metal pipeline (10) which may result in an error in the temperature of the flow medium sensed by the thermowell assembly (20). High temperature embodiments shown in FIGS. 4 and 5 do not contain any non-metal components and provide a minimal metal to metal contact between the metallic temperature conducting tube (36B) of the thermowell (20B) and the adjacent metal mounting structure (52B, 62B). The embodiments shown in FIGS. 8-12 illustrate a temperature sensing probe comprising a temperature sensing assembly (80F, 80G) mounted within the internal bore (37F, 37G) of the finned tube (36F, 36G). The temperature sensing assembly (80F, 80G) includes a carrier (82F, 81G) with epoxy (96F, 96G) mounting a temperature sensing element (93F, 93G) within the carrier (82F, 81G).

An apparatus and method for providing a seal between first and second relatively rotatable parts of machines which operate in an environment comprising dust, grit or other finely divided solid material entrained in air, water or other fluid. The seal includes a rotor and a stator between which there is an annular passage with substantial clearance between the interfacing surfaces defining the passage. The solid material entrained in the fluid which enters the annular passage is deposited in layers on the interfacing surfaces when the mechanism is in use. The layers substantially reduced the cross sectional size of the annular passage and restrict flow of the fluid there through. The annular passage may be rendered tortuous by providing the rotor with annular fins which in use project into annular recesses in the stator, and vice versa.

A non-rotating cement wiper plug has an insert, with inner and outer telescoping sleeves, within a resilient outer body. The outer body has annular fins which bear against a casing wall. The inner sleeve has a tapering nose within a tapered cavity in the outer sleeve. Slots in the outer sleeve form a plurality of segments. The inner and outer sleeves are preferably of a frangible material. When the plug is pumped down and lodges against downhole float equipment, pump pressure compresses the plug, forces the inner sleeve down within the outer sleeve, forces the segments radially outward, and fractures or separates the outer sleeve segments. The outer body is forced against the casing wall so tightly that it cannot rotate in response to the forces from a rotary drill bit. Lock surfaces on the inner and outer sleeves lock them together and maintain the outer body in its forced-outwardly position.

A unidirectional annular labyrinth seal having flexible annular fins positioned on a circular plate near an outer edge of the circular plate wherein the fins are biased towards a center of the circular plate. Annular ribs are positioned on an end of an idler roller. The fins project into recesses formed by the annular ribs, thereby forming the unidirectional annular labyrinth seal. The annular fins engage the annular ribs when the temperature of air within an interior of the roller is similar to the temperature of air exterior to the roller, thereby closing the labyrinth seal. The flexible annular fins bend away from the annular ribs when the temperature of air within the interior of the roller is higher than that of air exterior to the roller, thereby opening the labyrinth seal and allowing heated air within the interior of the roller to escape through the labyrinth seal.

A cooling device includes a heat-conducting base, two fin sets, and a heat pipe. The two fin sets are respectively constructed by a metallic stripe that is periodically folded and is arranged as a ring type. The heat pipe has a heated section that is thermally connected to the heat-conducting base, and a condensing section that is extended from the heat-conducting base is further formed as a flat shape, on which two oppositely flat faces are formed. The two flat faces of the condensing section of the heat pipe are respectively contacted closely with the two fin sets by being sandwiched therein. In such case, the contact area between the condensing section of heat pipe and the fin sets is enhanced, thus that the heat-conducting effect is promoted significantly.

The gas-tight, high or medium voltage electric switch device (1), containing an insulating gas under pressure, comprises switch contacts (2) capable of occupying an open position and a closed position and disposed inside a composite insulator formed by a rigid tube (3) surrounded by an elastomer casing (4) whose outside surface defines a succession of annular fins. The rigid tube and the elastomer casing are arranged so as to define an observation window (7) that is at least translucent, and through which the open or closed position of the switch contacts is visible.

A stationary mating ring for a mechanical seal is provided, comprising an annular body having a central axis and a sealing face; a first circumferential groove formed into the body behind the sealing face; and a first annular fin extending radially from the central axis. The mating ring further may include a second circumferential groove formed in the body adjacent to the first circumferential groove, wherein the second circumferential groove defines a second annular fin extending radially from the central axis. Optionally, the first or second annular fins each include a plurality of subdivided fins extending radially from the central axis, and such fins are symmetrically spaced around the central axis. Also provided is a complete mechanical seal, comprising a rotating ring having a sliding interface against a mating ring constructed in accordance with the aforementioned features.

The invention provides a solar thermoelectric generation device based on a Fresnel lens and a heat pipe principle, and belongs to the field of solar thermal power generation engineering. The device mainly comprises the point focusing type Fresnel lens, a transparent glass cover plate, a cylindrical cavity type heat absorber inner wall, a cylindrical cavity type heat absorber outer wall, annular thermoelectric generation modules, flat plate type thermoelectric generation modules, annular fins and uniform-section straight fins. Compared with other solar thermoelectric generation devices, the solar thermoelectric generation device based on the Fresnel lens and the heat pipe principle can achieve uniform heating of walls of heating ends of the thermoelectric generation modules, has the advantages of being compact in structure, few in operation parts, low in noise, reliable to operate, low in maintenance cost, convenient to adjust and good in performance, and can be used as a distribution type energy source.

The invention discloses a dust cleaning system applicable to a heat recovery boiler with a complex heating surface. The dust cleaning system comprises a lifter, a shot separating device, a shot distributer, a sealed flap valve, a separating device, a shot storing bin and a horizontal shot conveying device. The shot distributer is a slot type shot distributor, the slot type shot distributor is good in shot distributing effect, can guarantee full coverage on a first heat exchange tube layer, structurally effectively buffer falling speed of steel shots, and reduce impact of the steel shots to the heat exchange tubes and anti-wear strips; the steel shots in grain size of 2-4mm are utilized, compared with a conventional shot-falling dust cleaning system, the dust cleaning system is more applicable to dust cleaning of the heat recovery boiler utilizing a complex heating surface like a radiator fin/a fin/an annular fin tube to strengthen heat exchange, dispersity and distributing compactness of the shots on the heating surface are easier to guaranteed, and dust cleaning effect is good; and impact to the surfaces of the heat exchange tubes from the small-grain-size steel shots is lower, and service life of equipment is prolonged. The dust cleaning system applicable to the heat recovery boiler with the complex heating surface is capable of immediately effectively cleaning dust on the surface of the heating surfaced, is stable in running, low in investment and maintenance cost, and can maintain high efficient heat exchange of the complex heating surface.

The invention relates to a heat exchange structure with annular fins, which is used for improving heat dissipation capability of a heat generation device on an external environment. The heat exchange structure comprises the heat generation device and a heat conduction tape, wherein the heat conduction tape is wound around the heat generation device, and one group or multiple groups of annular fins are arranged at the outer side of the heat conduction tape. The invention also relates to a heat dissipation device having the heat exchange structure with the annular fins. The heat dissipation device comprises a box body and multiple groups of heat exchange structures, the multiple groups of heat exchange structures are arranged in the box body, a heat absorption material is arranged between the box body and the heat exchange structures, and the heat absorption material comprises one of a phase change material, an elastic encapsulating material or insulation heat conduction oil. Compared with the prior art, the heat exchange structure with the annular heat conduction fins has the advantages of excellent heat transfer improvement effect, good impact buffer effect, structure flexibility, light weight, small size and the like, and the composite heat dissipation device is excellent in heat dissipation performance.

The invention discloses a light-emitting diode (LED) bulb lamp. A radiating casing in the LED bulb lamp comprises a hollow annular fin group, a first port and a second port, wherein the hollow annular fin group is formed by at least three fins evenly distributed on a circumference at intervals, and the first port and the second port extend out from two ends of the radiating casing. The first port and the second port are respectively combined with a first annular guide rail in a lamp holder installation base and a second annular guide rail in a lamp shade installation base in a sleeved mode through a first ball and a second ball, so that the radiating casing can rotate along the lamp holder installation base and the lamp shade installation base. During working of the LED bulb lamp, air in the radiating casing is heated by an LED chip, the hot air rises up, a radiating casing group can be pushed to rotate along the first annular guide rail and the second annular guide rail by utilizing the air heat convection theory, air flowing is accelerated, and natural radiating is combined with air cooling forced radiating, so that the radiating effect is enhanced. Gaps are reserved among adjacent fins of the annular fin group, so that the radiating casing is of an opened structure, and the heat can be radiated conveniently.

The invention relates to a heat exchanger fin and a fin tubular heat exchanger and belongs to the technical field of heat exchange. The heat exchanger fin comprises: a platy fin main part and an annular fin rolling ring provided with a through hole inside. The fin rolling ring extends towards the direction of the intersection with the fin main part and consists of a rolling ring root, a rolling ring middle part and a rolling ring bent end part. The rolling ring root is connected with the fin main part. The section of the fin rolling ring is shaped as a spline curve, a control point of the spline curve is an intermediate point of the rolling ring middle part, and the spline curve passes through the intermediate point of the rolling ring middle part, a first end point of the rolling ring middle part, a second end point of the rolling ring middle part, a specified point of the rolling ring bent end part and a specified point of the rolling ring root. As the section of the fin rolling ring is shaped as the spline curve, the clearance between the fin rolling ring and the outer surface of a heat transfer pipe can be the minimum, thus improving the heat transfer efficiency between the fin rolling ring and the outer surface of the heat transfer pipe.

The invention provides a fuel cell temperature control system compatible with different power stacks. The fuel cell temperature control system comprises a PLC lower computer temperature control unit, an upper computer monitoring control unit, a circulating water loop and an electronic load, the circulating water loop comprises circulating water, an in-pile temperature sensor, an out-pile temperature sensor, a water tank, a water pump, a flow sensor, a heater, an annular fin type radiator, a high-power cooling fan and a low-power cooling fan; the PLC lower computer temperature control unit calculates the heat dissipation power required by the fuel cell stack according to the electronic load power so as to judge the working mode of the fuel cell temperature control system, and controls the working states of the heater, the high-power heat dissipation fan and the low-power heat dissipation fan by comparing the in-stack temperature with the set test temperature in different working modes, the temperature of the fuel cell is controlled, and the device has the advantages of being high in heat dissipation response speed, small in temperature fluctuation range of the fuel cell and wide in test target power range.

A plastic powder bonding device, including a reaction tank, a base and a driving device, and a stirring mechanism in the tank. The tank body is a cylindrical container with an upper opening. The inner cylinder of the tank is provided with multi-layer annular cooling fins, and the tank cover is provided with An oxygen detector is installed on the inside of the feeding port and the tank cover. The stirring mechanism is composed of a rotating shaft and a first vane group, a second vane group, a third vane group, and a fourth vane group that are socketed on the rotating shaft from top to bottom. A water-cooling circuit is provided in the stirring blade, a nitrogen passage is provided in the reaction tank, and the driving device is that the motor drives the rotating shaft to rotate through a belt transmission mechanism. In plastic powder bonding, this device can not only ensure the temperature rise requirement, so that the plastic powder and pigment can be quickly bonded, but also can take away excess heat to prevent material agglomeration, and the nitrogen circuit can ensure safe production.

The invention discloses a thin heat dissipating device comprising a uniform-temperature plate, a fan module and an annular fin group. The uniform-temperature plate has a condensing surface. The fan module and the uniform-temperature plate are fixedly connected with each other. The fan module includes a cover plate and a fan mounted under the cover plate, and the cover plate is provided with an air vent corresponding to the fan. The annular fin group is clamped between the cover plate and the condensing surface, and the annular fin group annularly surrounds the outer periphery of the fan. Thus, the fan is accommodated in a space formed by the cover plate, the condensing surface and the annular fin group and can blow air directly to the uniform-temperature plate and the annular fin group, and therefore, the heat dissipating efficiency of the thin heat dissipating device is improved.

The invention relates to an automobile wire harness sheath. A piezoelectric crystal is fixed by adhering to an annular inner wall of a protective annular sleeve; an annular clamping groove is formed on an outer circumferential surface of the protection annular sleeve; an U-shaped annular chamber which is fitted and nested with the annular clamping groove is preset in the protection annular sheath; an electrorheological fluid which is conductively connected to the piezoelectric crystal through an electrode fills the U-shaped annular cavity; an annular fin which is positioned in the rear of the annular cavity is arranged on the outer wall of the rear end of a center sheath; the hardness of the annular fin is lower than that of the protection annular sheath and the periphery of the annular fin is expanded to the outer rim of the annular cavity; after the harness is pulled, the center sheath moves forward relative to the protection annular sheath, which makes the annular fin go into the U-shaped annular cavity to press the piezoelectric crystal; and the piezoelectric crystal is triggered to generate a power supply which exerts on the electrorheological liquid to make the electrorheological liquid electrified. The automobile wire harness sheath improves rigidity so as to prevent the protection annular sheath from coming off from a sheet metal hole.

The invention discloses an automatic dirt removing type air energy water heater. The automatic dirt removing type air energy water heater comprises an evaporator, a compressor, a water tank and a heat exchange pipe set. The heat exchange pipe set comprises a plurality of heat exchange pipes which are arranged along the inner wall of the water tank, are the same in diameter and are vertically arranged. Every two adjacent heat exchange pipes are communicated through a connecting pipe. The outer wall of any heat exchange pipe is sleeved with a dirt prevention pipe. The upper ends and the lower ends of the heat exchange pipes are connected with heat exchange pipe bearings respectively. The dirt prevention pipes can rotate relative to the heat exchange pipes. The water tank is arranged outside the heat exchange pipe set in a covering manner. A plurality of annular grooves containing annular fins are formed in the inner wall of the water tank from top to bottom, and the annular grooves and the opposite annular fins are matched in grain and depth. An insulating layer is arranged at the outer portion of the water tank. The insulating layer comprises glass cellucotton, insulating cotton and a foam plate arranged from interior to exterior in sequence. The designed automatic dirt removing type air energy water heater is high in heating speed, the heat exchange area is increased, and the energy consumption is reduced.

The invention discloses a metal hydride based annular fin type efficient heat storage reactor which comprises a reactor shell and a heat exchanging fluid pipe, wherein a gas hole allowing hydrogen toenter and exit and a safety valve port are formed in the upper end of the reactor shell; the heat exchanging fluid pipe penetrates to the upper end of the reactor shell from the lower end of the reactor shell; the upper end lower ends of the heat exchanging fluid pipe extend into the external part of the reactor shell; a plurality of annular fin structures are mounted on the part, in the reactor shell, of the heat exchanging fluid pipe at intervals in the axial direction; the diameters of the annular fins are sequentially reduced from top to bottom; a metal hydride powder bed is filled in thereactor shell; and the heat exchanging fluid pipe is connected with the reactor shell in a sealing manner. The metal hydride based annular fin type efficient heat storage reactor solves the problems that during the heat releasing process, the traditional shell-and-tube metal hydride heat storage reactor is lower in output temperature and poorer in heat exchanging performance.

The invention relates to a hydraulic test sealing structure of a pressure container. The hydraulic test sealing structure comprises a container body with a cylindrical cavity, wherein an annular fin is arranged in front of the cylindrical cavity; an annular groove type thin wall is arranged behind the cylindrical cavity; the rear end of the thin wall is hermetically welded with a hydraulic pressure connecting pipe; a sealing core rod penetrates into the cylindrical cavity from back to front and then is hermetically welded with the annular fin; the rear end of the sealing core rod is fixedly connected with a plug; the plug is positioned in the hydraulic pressure connecting pipe and is fixedly connected with the hydraulic pressure sealing pipe; the rear part of the sealing core rod is provided with a drainage cavity which is communicated with the cylindrical cavity; the plug is provided with a water injection hole for communicating the drainage cavity with the exterior. The invention also relates to a mounting and use method of the sealing structure. The invention provides the hydraulic test sealing structure and the mounting and use method aiming at an unconventional pressure container, so that effective sealing of a water outlet of the pressure container is realized, smooth pressure test of the pressure container is guaranteed, and the dimensional accuracy meets the requirements after hydraulic test. The hydraulic test sealing structure can be applied to hydraulic test sealing.