Classifications

• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B3/00—Ohmic-resistance heating
  • H05B3/40—Heating elements having the shape of rods or tubes
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B3/00—Ohmic-resistance heating
  • H05B3/78—Heating arrangements specially adapted for immersion heating
  • H05B3/82—Fixedly-mounted immersion heaters
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
  • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
  • F01M5/001—Heating
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B3/00—Ohmic-resistance heating
  • H05B3/40—Heating elements having the shape of rods or tubes
  • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
  • H05B2203/021—Heaters specially adapted for heating liquids

Definitions

• Device for influencing the temperature of fluid media in particular located in a lubricant system
• the invention relates to a device for influencing the temperature of fluid media, in particular lubricants located in a lubricant system, with a medium-flowable line and at least one temperature-influencing element associated with a line section that can be activated by supplying energy.
• Devices of this type can be used, for example, in machine systems, in particular in large machines, when operating conditions have to be reckoned with, in which fluids, such as lubricating oils, have temperatures which lead to unfavorable operating behavior, in particular excessive Viscosity.
• Such operating conditions such as may occur during cold running phases of certain plants or, in particular, in wind power plants under wintry conditions, make it difficult to transport the operating resources, for example the lubricant circuit. For this reason, usually at a certain line section, such as a lubricant line, which leads back from a transmission via a pump and filter devices and the like back to the gear, Einrichtun- conditions with elements to increase or decrease the temperature of the flowing medium present.
• Known devices of this type are constructed so that on the said line section one or more elements (heating elements, cooling elements) are externally mounted to influence the temperature, which are activated as needed.
• elements heating elements, cooling elements
• the outer insulating sheathing leads to a bulky outer contour of the line section which requires a large amount of space, so that installation in machinery is confined Installation conditions is very difficult.
• a particularly low efficiency results when the elements are attached to a non-metallic line section, for example to an oil suction hose, via which lubricant is sucked out of a transmission by means of a pump.
• the present invention seeks to provide a device for influencing the temperature, which is characterized not only by a comparatively much better efficiency, but also by a particularly space-saving design.
• a device having the features of claim 1 in its entirety. Due to the fact that in the invention at least one temperature-influencing element is arranged within the medium-conducting line section and can be supplied with energy via a connection device located in the wall of the line section, the losses avoided in the prior art due to heat transfer between the two on the outer wall of the line section of the located, temperature-influencing elements to the environment result, even if a costly outer insulation is provided above the elements. On the other hand, there is a very strong improvement in the efficiency due to the direct heat transfer between the medium and the elements located in its flow path.
• the device according to the invention also eliminates the need for bulky external insulation surrounding the line section and the elements located on the outside, the device according to the invention is also distinguished by a particularly compact, space-saving design, so that the device is also used in machine installations can be used without difficulty, where limited space prevail and little space is available.
• the at least one temperature-influencing element is arranged within an element unit, and the connection device is designed such that it forms a holder for the positional determination of the element unit.
• the element unit is accordingly a heating unit, which contains at least one activatable by electrical energy heating element, in particularly advantageous embodiments, the arrangement is such that the heating unit at least one heating element as has provided, in the longitudinal direction of the line section réellerek- kende heating band.
• Heating bands in the form of self-regulating mecanicnitzbs are known and commercially available.
• the self-regulating feature allows use of such heating bands without the need for electrical control devices. Since such heating tapes are also available in any desired length available, such heating tapes are particularly suitable for use in the device according to the invention.
• the heating unit containing the at least one heating strip has a surrounding surrounding the at least one heating tape and this sealing against the medium.
• This may advantageously be a corrugated tube made of stainless steel, which is tightly welded at one end and at its other end with the connection device in connection.
• connection device has a connection stub located at an end region of the line section through which the associated end of the corrugated hose extends.
• This end of the corrugated hose can be welded to a sleeve-like adapter, which can be screwed with the interposition of a seal arrangement with the outer end portion of the connection piece, which can form a passage for a connection cable for the power supply of at least one heating tape located in the corrugated hose.
• two longitudinal heating strips are provided in the annular corrugated tube, which are held by a separating element extending between them at a distance from each other, so that a thermal influence of the heating bands with each other and thus an impairment of the self-regulating property of each heating band are avoided.
• the arrangement is preferably such that the line section has a metallic manifold adjoining the oil suction hose and angled relative to the longitudinal axis of the suction hose in that the connecting piece is provided on the latter, the connecting piece preferably being in the direction of the longitudinal axis of the
• Suction hose extends, so that the screwed with the connecting sleeve corrugated hose is fixed in a direction extending in the direction of the longitudinal axis of the suction hose layer.
• FIG. 1 shows a shortened longitudinal section of an embodiment of the device according to the invention, wherein the Ausaus shown Forming example for increasing the temperature of lubricating oil is formed, which flows through a ⁇ lsaugschlauch;
• Fig. 2 is a broken and compared to a practical embodiment slightly enlarged and partially cutaway drawn view of a heating tape for use in the device according to the invention;
• FIG. 3 shows a diagram drawn in a highly schematically simplified manner merely to clarify the positional arrangement of two heating strips, which are shown on a smaller scale than in FIG. 2, within a covering of the heating unit provided in the exemplary embodiment of the invention
• Fig. 4 shows a comparison with FIG. 1 and compared to a practical embodiment enlarged and broken drawn longitudinal section only the envelope of the heating unit.
• suction hose 1 The formed in a known manner, non-metallic see suction hose 1 is connected at one end by means of a connection fitting 3 with a transmission, not shown, and has at the opposite end to a metallic elbow 5, which is bent relative to the longitudinal axis 7 of the suction hose 1 at right angles and leads to a pump, not shown, which sucks the lubricating oil from the transmission and forms part of a respective lubricant circuit.
• a connecting piece 9 is welded to the manifold 5 so that it forms a passage whose axis with the longitudinal axis 7 of the suction hose 1 coincides.
• an elongate heating unit designated as a whole by 1 1 extends into the interior of the suction hose 1, specifically along the axis 7 into the vicinity of the end-side connection fitting 3.
• the heating unit 11 has as envelope, the the interior of the heating unit 11 fluid-tight seals against the surrounding lubricating oil, a corrugated hose 13 commercially available type of stainless steel.
• the connecting piece 9 associated input end of the corrugated tube 13 is welded to a sleeve-like adapter 17 at a weld 19.
• the adapter 17 has a thickening with a conical surface 23 inclined inwards in the direction of the weld 19, in which an annular groove 25 is formed for a sealing ring, not shown in FIG. 4.
• Fig. 1 shows the heating unit 1 1 in the installed state, wherein the corrugated hose 13 extends into the connecting piece 9, which forms a holder for the heating unit 1 1, d. H. with its inner wall the
• connection piece 9 has a conical surface complementary to the conical surface 23 of the adapter 17, against which the conical surface 23 of the adapter 17 rests in the installed state and is sealed by the sealing ring 27 seated in the annular groove 25 (FIG.
• the outer end portion of the connecting piece 9 has an external thread 29, by means of a union nut 31, which is supported on an annular shoulder 33 (Fig. 4) of the adapter 17, to screw this with the connection nozzle.
• the adapter 17 has at its open end 21 an internal extension with an internal thread 35, into which a hollow threaded plug 37 can be screwed in, the part of the passage of an electrical connection cable in the form of a so-called
• Oil connection 39 is. About this connection 39, the electrical power supply of the heating unit located in the heating unit 1 1 within the annular corrugated tube 13.
• FIGS. 2 and 3 show the structure of a heating cable provided for use in the invention, which is designated in Fig. 2 as a whole by 41 and in the usual way has two longitudinally spaced electrical conductor 43, between which band-shaped material 45 is located which forms a self-regulating resistance element in a manner known per se between the conductors 43.
• the electrical resistance of the material 45 has a positive temperature coefficient, so that as the temperature of the material 45 increases, the strength of the current flowing between the conductors 43 decreases and the heating effect is self-limiting. Since heating tapes 41 are available in any length, can be provided without the need for control and / or regulating devices to cover the respective desired power and temperature ranges.
• the heating tape 41 is constructed so that the self-regulating material 45 is surrounded by an electrical insulating 47. This in turn is surrounded by a protective braid 49 made of tinned copper wire. This braid is used for grounding (protective conductor) of the heating tape, ensures personal safety according to VDE regulations and provides additional mechanical protection.
• the outer end of the structure forms an outer sheath 51 of polyolefin.
• the heating unit 11 has two heating strips 41 arranged longitudinally within the annular corrugated hose 13, which, as the outline sketch of FIG. 3 illustrates, are thermally insulated from one another by a joint tape 53 running longitudinally between them.
• This thermal decoupling of the heating tapes 41 prevents the temperatures of the two tapes from playing out each other, thus ensuring that the resistance value, and therefore the power of the heating power, is a function of the temperature of the surrounding medium, without being influenced by the other heating tape.
• the use of heating tapes 41 is advantageous in several respects. Thus, due to the self-limiting of the performance, use without a temperature limiter is possible. Due to the parallel power supply, the heating bands 41 can be cut to length in any length in adaptation to the relevant conditions of use.
• a joint tape 53 in the form of a precompressed polyurethane foam has proven to be particularly advantageous. Specifically, it may be an open-cell flexible polyurethane foam, impregnated with flame-retardant synthetic resin.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Pipe Accessories (AREA)
• Lubrication Of Internal Combustion Engines (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=37865846

Family Applications (1)

Country Status (8)

Families Citing this family (12)

Citations (1)

Family Cites Families (12)

• 2006
  • 2006-04-04 DE DE102006015601A patent/DE102006015601A1/de not_active Withdrawn
  • 2006-04-11 US US11/401,481 patent/US7424211B2/en not_active Expired - Fee Related
  • 2006-12-20 JP JP2009503423A patent/JP5215286B2/ja not_active Expired - Fee Related
  • 2006-12-20 CN CN2006800537119A patent/CN101401484B/zh not_active Expired - Fee Related
  • 2006-12-20 CA CA2642756A patent/CA2642756C/en not_active Expired - Fee Related
  • 2006-12-20 KR KR1020087023735A patent/KR101336681B1/ko not_active IP Right Cessation
  • 2006-12-20 WO PCT/EP2006/012271 patent/WO2007118509A1/de active Application Filing
  • 2006-12-20 EP EP06829753A patent/EP2002693A1/de not_active Withdrawn

Patent Citations (1)

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