Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F7/00—Magnets
  • H01F7/06—Electromagnets; Actuators including electromagnets
  • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
  • H01F7/16—Rectilinearly-movable armatures
  • H01F7/1607—Armatures entering the winding
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
  • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
  • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
  • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
  • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
  • F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
  • F15B13/0442—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors with proportional solenoid allowing stable intermediate positions
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
  • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
  • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
  • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
  • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
  • F15B13/0401—Valve members; Fluid interconnections therefor
  • F15B2013/0409—Position sensing or feedback of the valve member
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F7/00—Magnets
  • H01F7/06—Electromagnets; Actuators including electromagnets
  • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
  • H01F7/126—Supporting or mounting

Definitions

• the invention relates to an electromagnetic actuator according to the kind defined in the preamble of claim 1.
• a proportional magnet with displacement measuring system in which a pressure tube formed as an anchor tube and sensor tube is installed in a housing. With this proportional magnet, a magnetic coil and a sensor coil are installed in the housing from opposite ends. Four longitudinal bores and associated screws are provided in the housing for attaching the proportional magnet to a control valve. In the area of the measuring system, a housing surrounding the measuring system is broken through in order to establish an electrical connection between the To be able to carry out measuring system and a corresponding electronics.
• tie rods for connecting the electromagnetic actuating device to a control valve is expensive and is unsatisfactory in terms of production technology.
• the pressure pipe overlaps the displacement measuring system and a housing cover is screwed onto a thread provided at one end of the pressure pipe to close the housing.
• the position measuring system has an electrically conductive cable for signal transmission to electronics of the electromagnetic actuating device, which is guided through a slot in the pressure tube.
• the slot of the pressure pipe leads to a reduction in the stability of the pressure pipe and the fastening of the housing cover can lead to a deformation of the slot. It is also disadvantageous that the described design of the pressure pipe with a slot and the external thread provided for fastening the end cover causes high manufacturing costs and results in complex assembly.
• the electromagnetic actuating device according to the invention with the features of claim 1 has the advantage that it is characterized by a particularly simple assembly on the control valve, since the pressure tube is already inserted into the magnet coil during magnet manufacture and the electromagnetic actuating device thus as a complete unit during valve assembly is present, which is only screwed to the control valve.
• FIG. 1 shows a longitudinal section through an electromagnetic actuating device in a simplified representation, the collar being formed in one piece with the pressure tube;
• FIG. 2 shows a longitudinal section through an electromagnetic actuating device in a simplified representation, the collar being formed in one piece with the sensor tube;
• FIG. 3 shows an enlarged illustration of section Z from FIG. 2.
• FIG. 1 shows a simplified representation of a longitudinal section through an electromagnetic actuating device 1, in which a pressure tube 2 has a central thread 3 on the end face, with which it is fastened in a valve housing or the like, not shown in any more detail.
• a sleeve 4 with magnetic coil 5, position measuring system 6 and electronics 33 is pushed and fastened onto the pressure pipe 2.
• the pressure tube 2 is constructed pressure-tight in a manner known per se and consists of an anchor tube 7 and a sensor tube 8 tightly and firmly arranged in the anchor tube 7.
• the anchor tube 7 has a pole piece 9, on which, in addition to the central thread 3, first key faces 10 are arranged and which is followed by a magnetically non-conductive first tube part and a magnetically conductive second tube part.
• the anchor tube 7 has at its open free end a collar 13 which, for bracing the components saddled on the pressure tube 2, i. H. the solenoid 5, the sleeve 4 and a housing part 14 is used.
• the collar 13 is formed in one piece with the anchor tube 7 and projects beyond it in the radial direction.
• a spring 16, not shown is installed for tolerance compensation, via which the collar 13 presses on the housing 15.
• the spring 16 is designed as a corrugated spring which is supported on a projection of the housing 15 and which prestresses the components saddled on the pressure pipe 2 or the individual parts of the magnetic circuit in their installation system.
• the anchor tube 7 receives in its interior the sensor tube 8, which is guided concentrically in the anchor tube 7 with a thickened flange, not shown, and is tightly and firmly connected to it at an attachment point.
• a tubular section 19 of the sensor tube 8 projects from the thickened flange with respect to the anchor tube 7 much smaller diameter out of the anchor tube.
• a coil carrier 20 with sensor measuring coils 21 is slidably guided on the outside and pressed against a nut 23 by a further spring which is supported on the flange and serves as an adjusting means for the sensor coils 21.
• the sensor coils 21 have pluggable electrical connections 24, which are arranged on the outer diameter of the sensor coils 21.
• the outer diameter of the displacement measuring system 6 is designed such that an assembly tool (not shown) can be guided over it and attached to second key surfaces 25 of the collar 13 in order to screw the electromagnetic actuating device 1 to a control valve.
• the housing of the control valve comes to rest against an end face 26 of the sleeve 4, as a result of which the collar 13 clamps the components saddled on the anchor tube 7.
• the collar 13 instead of the second key surfaces 25 is provided with recesses into which a suitable tool engages, it being, of course, at the discretion of the person skilled in the art that the device which corresponds to an assembly tool is in another suitable one Way to perform.
• a ferrite core of the inductive displacement measuring system 6 is arranged, which is mechanically operatively connected to an anchor guided in the pressure tube 2.
• the one in Pressure tube 2 between the pole piece 9 and the thickened flange armature is firmly connected to a tappet, for example, a valve spool of a directional control valve can be actuated.
• the pressure tube 2 has in this way, starting from the central thread 3 to the collar 13, a continuously constant outer diameter, its tube parts being formed from a tube piece of the same thickness throughout.
• the cup-shaped sleeve 4 pushed onto the pressure tube 2 receives the magnet coil 5 in its interior and the annular space of the sleeve 4, which is open towards the measuring system 6, is closed by the housing part 14.
• the sleeve 4 can be produced from round material, it being of course at the discretion of the person skilled in the art to design the sleeve 4 as an inexpensive deep-drawn part.
• a seal is formed via mutually corresponding bevels 31A, 31B, the angles of the bevels 31A, 31B being provided such that there is a sealing line contact between the bevels 31A, 31B in the assembled state of the actuating device 1, which prevents casting resin from flowing out of the magnetic coil.
• the electronics 33 is arranged on the actuating device 1 in an easily accessible and well-protected and sealed manner.
• To connect the magnetic coil 5 and the sensor coils 21 to the electronics 33 are partly not shown. provided multi-pin cable 34 and connectors 24 provided.
• control device 1 Via the displacement measuring system 6, the actual value of the position of the armature in the pressure pipe 2 is always compared with the nominal position value fed into the electronics 6 and the armature is controlled accordingly via the solenoid 5 until the two values match.
• FIG. 2 shows a further embodiment of the electromagnetic actuating device 1, this embodiment essentially differing from the embodiment shown in FIG. 1 in that the collar 13 is formed in one piece with the sensor tube 8.
• the same reference numerals are used for components with the same function as in the description of FIG. 1, and only the essential differences are dealt with.
• the sensor tube 8 is not only made in one piece with the collar 13, but it also forms an integral structural unit with the thickened flange, which is designed as a threaded nipple 17 and via an external thread 35 is screwed into the pressure pipe 2.
• the threaded nipple 17 also forms a stop for the armature 30.
• the spring 1b is provided for tolerance compensation in the axial direction of the actuating unit 1 and for the pretensioned installation of the components saddled on the pressure pipe 2.
• the collar 13 is provided with a device corresponding to an assembly tool, such as the key surfaces 2 shown, or alternatively with cutouts for the assembly tool, to facilitate the screwing-in process of the threaded nipple 17 or the thickened flange.
• FIG. 3 shows the detail Z according to FIGS. 1 and 2 in an enlarged representation.
• the pressure tube 2 is provided in the area of the magnet coil 5 on its outside with a recess 36, in which the magnet coil 5 engages with a projection 37 formed on its inside facing the pressure tube 2.
• the recess 36 is designed as a recess in such a way that the projection 37 formed as a plastic nipple of the magnetic coil projects into it and the pressure tube 2 with the mounted magnetic coil is retained as a structural unit during transport for final assembly with a control valve.
• the recess 36 is formed in the axial direction larger or longer than the projection 37, with which the solenoid 5 can be moved in the axial direction in the untensioned installation position on the pressure pipe 2.
• the collar is made in one piece with a socket. is formed, which is at least partially arranged on the anchor tube or in the anchor tube. It is possible to firmly connect the socket to the anchor tube by means of a screw connection, the socket having an external or internal thread depending on whether the socket is arranged on or in the anchor tube.
• the collar thus represents an independent component before assembly, which simplifies the manufacture of the pressure tube and also the sensor tube.
• the actuating device 1 is particularly suitable as a single-acting proportional magnet, in which the stroke of the armature 29 is regulated with the aid of the displacement measuring system 6, the actuating device 1 can also be used as a switching magnet, the displacement measuring system 6 being used only for indicating the position. Furthermore, the advantages of the actuating device 1 can also be achieved if a double-acting type, namely a double-stroke magnet, is used instead of a single-acting type.

Landscapes

• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Electromagnetism (AREA)
• Power Engineering (AREA)
• Fluid Mechanics (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Magnetically Actuated Valves (AREA)
• Massaging Devices (AREA)
• General Induction Heating (AREA)
• Measuring Fluid Pressure (AREA)

Applications Claiming Priority (3)

Publications (2)

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ID=7683657

Family Applications (1)

Country Status (6)

Families Citing this family (8)

Family Cites Families (8)

• 2001
  • 2001-05-04 DE DE10121770A patent/DE10121770A1/de not_active Withdrawn
• 2002
  • 2002-05-06 CN CN028093704A patent/CN1217354C/zh not_active Expired - Fee Related
  • 2002-05-06 EP EP02740319A patent/EP1386332B1/fr not_active Expired - Lifetime
  • 2002-05-06 WO PCT/DE2002/001627 patent/WO2002091404A1/fr active IP Right Grant
  • 2002-05-06 US US10/476,805 patent/US20040178377A1/en not_active Abandoned
  • 2002-05-06 AT AT02740319T patent/ATE371939T1/de not_active IP Right Cessation
  • 2002-05-06 DE DE50210814T patent/DE50210814D1/de not_active Expired - Lifetime

Non-Patent Citations (1)

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