Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
  • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
  • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
  • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
  • F16F9/32—Details
  • F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
  • F16F9/46—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall
  • F16F9/465—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall using servo control, the servo pressure being created by the flow of damping fluid, e.g. controlling pressure in a chamber downstream of a pilot passage
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
  • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
  • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
  • F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K31/00—Actuating devices; Operating means; Releasing devices
  • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
  • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
  • F16K31/0603—Multiple-way valves
  • F16K31/0606—Multiple-way valves fluid passing through the solenoid coil
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K31/00—Actuating devices; Operating means; Releasing devices
  • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
  • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
  • F16K31/0603—Multiple-way valves
  • F16K31/061—Sliding valves
  • F16K31/0613—Sliding valves with cylindrical slides
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K31/00—Actuating devices; Operating means; Releasing devices
  • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
  • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
  • F16K31/0644—One-way valve
  • F16K31/0651—One-way valve the fluid passing through the solenoid coil
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K31/00—Actuating devices; Operating means; Releasing devices
  • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
  • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
  • F16K31/0644—One-way valve
  • F16K31/0668—Sliding valves
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K31/00—Actuating devices; Operating means; Releasing devices
  • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
  • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
  • F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
  • F16K31/0679—Electromagnet aspects, e.g. electric supply therefor with more than one energising coil

Definitions

• the invention relates to a control valve according to the preamble of the appended claim 1 for guiding pressurized medium to an actuator, said actuator being arranged in connection with a machine tool, a vehicle or foundations of a building.
• Actuators are used in several applications as vibration damping elements. As examples it is possible to mention hydraulic and pneumatic actuators which have been installed in connection with vehicles and different kinds of machines used in the industry to dampen vibrations occurring in them during use. Vibration damping elements are also used in connection with buildings and foundations of machines used the industry.
• Fig. 1 shows the cross-section of a valve that can be connected to actuators according to the preceding examples to convey the medium producing the movement of the actuator to the actuators.
• the control valve comprises a magnet 1 surrounded by the frame 2 of the valve.
• a cover 3 of the valve is connected to one side of the magnet.
• a coil 4 is arranged around the core 1a of the magnet and electric current is supplied thereto via a conductor 5 to produce a magnetic field.
• Concentrically through the cover 3 of the valve and the core 1a of the magnet is produced a boring 6 for a valve control member, i.e. a stem 7 moving in its longitudinal direction.
• the valve stem 7 is preferably equipped with a suitable set of lugs 8, wherein in the different positions of the stem, the flow of the medium is directed between an inflow channel 9 and an outflow channel 10.
• a linear actuator, i.e. a speech coil 11 is partly in contact with the magnet 1.
• the speech coil 11 comprises a frame 11a and a coil 11 b wound around the same.
• Conductors 12 are connected to the speech coil to convey electric current through the coil of the speech coil.
• a cone-like coupling member 13 having a rigid structure connects the speech coil 11 and the stem 7.
• the coupling member 13 is connected to the speech coil 11 from its end having a larger diameter and to the stem 7 of the valve from its end having a smaller diameter.
• the stem 7 of the valve is moved back and forth in the desired direction in the boring 6, wherein the set of lugs 8 in the stem are positioned in accordance with said movement in relation to the inflow channel 9 and outflow channel 10 of the valve, thus enabling the flow of the pressurized medium in and out of the valve.
• the movement of the stem 7 is attained by supplying electric current to the coil of the speech coil 11 that produces the linear movement of the speech coil 11.
• the coupling member 13 moves in accordance with the movement of the speech coil, at the same time moving the stem 7 of the valve.
• the operation and movement of the speech coil in the magnetic field is known as such for a person skilled in the art, wherein it will not be described in more detail in this context.
• valve is functional as such, but it contains certain significant drawbacks.
• said valve has a complex structure. Therefore it is difficult to manufacture. This increases the manufacturing costs of the valve and makes it an expensive component for the end user. Due to the complex structure, it is difficult or even impossible to maintain the valve and replace the parts when they have been broken.
• the step response of the valve is slow, i.e. the stem of the valve reacts to control commands slowly. This results from the fact that the stem of the valve is heavy, which slows down its movement. This also decelerates the flow of the pressurized medium from the outlet port of the valve. The flow of the medium will not comply with the control command until the stem has had the time to move to the correct position, which in the worst case may take several milliseconds.
• the slow step response of the valve causes slowness in the reactions of the actuator.
• the purpose of the present invention is to provide a control valve for supplying pressurized medium to an actuator, which control valve avoids the above-presented problems and enables faster and more accurate positioning of the valve than before.
• control valve according to the invention is primarily characterized in what will be presented in the characterizing part of the independent claim 1.
• the invention is based on the idea that a control valve is used for supplying pressurized medium to an actuator, in which control valve at least one coil is arranged around a control member for moving the control member in a magnetic field.
• the control member controls the volume flow of the pressurized medium. In other words, an element moving the control member is directly connected thereto.
• the control member is formed as a cylindrical piece that is at least partly hollow inside.
• the valve contains at least one outflow chamber for the pressurized medium.
• the medium flows to the outflow chamber either from an inflow chamber or an inflow channel through a flow guide.
• the control member is positioned in such a manner in relation to the flow guide that it is capable of controlling the volume flow of the medium through the flow guide.
• the at least one coil arranged on the outer surface of the control member is at least partly surrounded by the pressurized medium.
• the valve contains at least one magnet to which electric current is supplied to form a magnetic field.
• the magnet used in the valve is designed in such a manner and the at least one coil arranged on the outer surface of the control member is positioned in relation to magnet/magnets so that the density of the magnetic flux is the highest possible in the surroundings of the coil of the control member. This results in that the movements of the control member are fast and precise, and correct positioning of the control member is easy and rapid.
• the magnets can be either permanent magnets or electric magnets. If an electric magnet is used, it is possible to supply either direct current or alternating current thereto.
• At least one spring is attached to the control member, said spring holding the control member in its place when it is not being controlled. More than one spring is connected to the control member, and they have been positioned symmetrically around the control member. It is also possible to use the spring as a supporting structure for the conductors supplying electric current to the coil, wherein the durability of the conductors improves.
• a slack spring with a low natural oscillation frequency is selected.
• a rigid spring is selected whose natural oscillation frequency is high. Less power is required to control a rigid spring than a slack spring. It is possible to select a spring suitable for the application in question by calculation by means of amplitude resonance in the following way:
• the spring is not absolutely necessary for the function of the control valve. However, the force produced by the spring is considerably smaller when compared to the force produced by the speech coil.
• the pressurized medium controlled by the control valve can be a liquid or gaseous medium.
• the valve it is advantageous to use feedback control, but it is also possible to control the actuator connected to the valve proportionally, without feedback.
• outflow channels may vary, and there may be 1 to 20 outflow channels.
• An individual valve according to an embodiment of the invention functions like a 2/2 valve containing two ports and two stem positions. According to another embodiment it is also possible to form an individual valve as a 4/2 valve. It is also possible to connect valves to each other, wherein several different operating alternatives can be attained.
• valve It is not necessary to provide the valve with a separate, heavy stem, wherein the entire valve is smaller in size and lighter, wherein it can be installed in connection with actuators more easily.
• the control member itself is naturally lighter as well, wherein it can be moved faster, and thus the flow of the medium can also be controlled faster. In tests response times of 0.1 ms have been measured as the reaction time of the control member. Furthermore, it has been noted that increasing the flow from zero to full flow or closing of the same from the full flow may be reached even in approximately 1 ms. As a consequence of all this the positioning of the actuator to the desired operating state is fast.
• valve Because of the simpler structure, the valve is also less expensive than the valves currently in the market that are capable of almost the same action.
• the valve has been designed in such a manner that it can be easily maintained and the parts that wear can be easily replaced.
• the inner calibration of the valve can be carried out easily by using a pressure sensor.
• the parts used in the valve, especially the at least one coil arranged around the control member is very durable. This results from the fact that it is at least partly surrounded by the pressurized medium that cools down the coil when it is controlled with high currents. Especially in view of damping the vibrations, it is very advantageous that the step response of the actuator becomes faster. Furthermore, by means of the valve it is also possible to attain other than sine wave.
• Fig. 1 shows the cross-section of a valve according to prior art
• Fig. 2 shows the cross-section of a control valve according to the invention
• Fig. 3a shows a way of coupling a control valve according to the invention
• Fig. 3b shows another way of coupling a valve according to the invention
• Fig. 3c shows a hydraulic circuit diagram of a valve series having two valves coupled to each other
• Fig. 3d shows the control of an actuator by means of two valve series
• Fig. 4 shows a second control valve according to the invention
• Fig. 5 shows an embodiment in which vibration is damped with a separate actuator
• Fig. 6 shows a second embodiment in which vibration is damped with a separate actuator
• Fig. 7 shows a third control valve according to the invention. Detailed description of the invention
• vehicle refers to vehicles moving by means of a motor, such as cars and vessels.
• foundation of buildings refers to foundations of residential buildings, office buildings and industrial buildings, foundations of machines used in industry as well as foundations of bridge constructions.
• Fig. 2 shows an embodiment of the invention as a 2/2 valve.
• the control valve 14 shown in the figure comprises a valve frame 15 which is designed to be hollow inside for positioning the parts of the valve inside the frame 15.
• the frame can be formed of a uniform, housing-like element 15a that forms the bottom and end walls, and of a cover part 15b attached thereto, as in the embodiment of Fig. 2.
• the frame of the valve can also be composed of separate bottom and cover parts, and side walls attached thereto. If desired, the valve can also be produced without the cover.
• the valve is attached to the actuator 23 by a fastening member 32 in such a manner that the cover of the valve 15b is in contact with the actuator 23.
• a magnet 16 is arranged inside the frame, which is preferably an electric magnet, but a permanent magnet can also be used.
• the coil 17 of the magnet is wound around the core 16a of the magnet. Electric current is supplied to the coil 17 of the magnet via a conductor 18 in order to produce a magnetic field.
• a control member 19 is at least partly in contact with the magnet 16, said control member being designed as a cylindrical piece that is at least partly hollow inside.
• an outflow chamber 22 As an extension of the core 16a of the magnet there is an outflow chamber 22 separated from an inflow chamber 28 by means of a cy- lindrical wall 22a.
• the control member 19 is arranged around the core 16a of the magnet and the wall 27 of the outflow chamber in such a manner that it extends over the entire length of the wall 17 and partly around the core 16a of the magnet. In this section the inner surface of the stem is in contact with the outer surface of the core 16a of the magnet.
• control member 19 restricts the outflow chamber 22 of the valve and its walls inside itself.
• the inflow channel 28 of the valve is outside the control member.
• the coil wound on the outer surface of the control member 19 is thus located inside the inflow chamber 28, surrounded by the medium contained therein.
• a flow guide 25 guiding the flow of medium from the inflow chamber 28 to the outflow chamber 22 when the control member 19 has been moved to a position in which it does not prevent the flow.
• the flow guide 25 is formed of holes 25a arranged in the wall of the outflow chamber.
• the other end of the control member 19 is in contact with a damping plate attached to the valve cover 15a.
• the control member covers the holes 25a of the flow guide 25 and prevents the medium from flowing from the inflow chamber 28 to the outflow chamber 22 and further via the outflow chamber 26 to the actuator 23 connected to the valve.
• the frame 15a, the cover 15b, the magnet 16 and the control member 19 of the valve define the inflow chamber 28 of the valve, to which an inflow channel 29 is connected to guide pressurized medium to the inflow chamber 28.
• the magnet 3 is designed in such a manner that a magnetic gap 30 is formed therein.
• the magnetic gap 30 has a narrow shape. This design produces an efficient magnet whose magnetic flux is even in the magnetic circuit.
• the length of the control member 19 and the location of the coil 20 in relation to the length of the control member are arranged in such a manner that the coil is positioned substantially in the magnetic gap 30, wherein the movements of the control member 19 are rapid and precise.
• Two springs 31 are attached symmetrically around the control member 19 in such a manner that the first end of the spring is attached to the control member 19.
• the second end of the springs is attached to the wall of the inflow chamber 28.
• the springs press the control member 19 against the damping plate when the control member is not being controlled. It is also possible to use the spring as a supporting structure for the conductors 21a and 21b of the coil 20, wherein the durability of the conductors improves.
• the control valve according to Fig. 2 functions in the following manner: By means of the electric current supplied to the coil 17 of the magnet via the conductor 18 a magnetic field is generated with the magnet 16. Pressurized medium is constantly supplied to the inflow chamber 28 of the valve via an inlet port 29.
• the valve is not being controlled, i.e. current is not supplied to the coil 20 arranged around the control member 19, the spring 31 presses the control member 19 against the baffle plate 23.
• the control member covers the holes 25a arranged in the flow guide 25 and closes the flow path of the medium from the inflow chamber 28 to the outflow chamber 22.
• Fig. 3a shows an alternative for coupling the control valve shown in Fig. 2 to the actuator. Said actuator is connected further to a process device (not shown) to dampen its vibrations.
• the coupling in question is a so-called 2/2 coupling.
• the control valve 14 is connected to an actuator 23, which in this embodiment is a motor.
• the actuator can also be a pump or a hydraulic cylinder functioning as a damper of the vibrations.
• the valve 14 is coupled to a control unit 33 via a line 34, said control unit controlling the quantity and direction of the electric current supplied to the coil arranged around the control member of the valve. This brings about the desired movement of the control member and a volume flow of the pressurized medium via a line 35 to the motor.
• the outlet of the motor has a feedback to the control unit. For this purpose the outlet of the motor 23 is provided with a measuring sensor
• Fig. 3b shows an alternative for coupling the control valve shown in Fig. 2 to the actuator.
• the coupling in question is a so-called 2/2 leakage flow coupling.
• the control valve 14 is coupled to a control unit 33 via a line 34, said control unit controlling the movements of the control member of the valve in the above-described manner and producing the desired flow of pressurized medium via a line 38 to the actuator 23.
• the actuator 23 is a hydraulic cylinder.
• a choker 40 has been installed in the leakage coupling 39 to control the leakage flow. From the outlet of the actuator there is a feedback to the control unit.
• a measuring sensor 41 is arranged in connection with the hydraulic cylinder 23, which measuring sensor can be a linear sensor or force transducer, and the measurement result obtained therefrom is conducted via the line 37 to the control unit 33.
• Fig. 3c shows a valve series comprising two control valves 14 coupled together.
• This coupling method is a so-called 3/2 coupling in which one control valve controls the incoming flow P of the pressurized medium and the other control valve controls the flow T of the pressurized medium discharged from the valve series.
• the 3/2 coupling is known to anyone skilled in the art, and therefore it will not be described in more detail in this context.
• Both valves 14 are coupled to the control unit 33 via the line 34, said control unit controlling the movements of the control members of both valves in the above-described manner and produces the desired flow of pressurized medium via a line 38 to the actuator 23.
• the actuator 23 is a hydraulic cylinder. From the outlet of the actuator there is a feedback to the control unit.
• a measuring sensor 41 is arranged in connection with the stem of the hydraulic cylinder 23, which measuring sensor can be a linear sensor or force transducer, and the measurement result obtained therefrom is transmitted via the line 37 to the control unit 33.
• Fig. 3d shows a valve series comprising four control valves 14 coupled together as a so-called 4/3 coupling.
• All control valves are coupled to the control unit 33 via the lines 34, said control unit controlling the movement of the control members 19 of each valve in the above-described manner.
• the control valves 14 are coupled to each other in pairs in such a manner that two control valves 14 are coupled together.
• One pair A guides the pressurized medium via a line 42 to the chamber at the actuator 23 side, i.e. the piston side of the hydraulic cylinder, and the other pair B guides the pressurized medium via a line 43 to the chamber at the piston rod side of the hydraulic cylinder.
• From the outlet of the actuator there is a feedback to the control unit.
• a measuring sensor 41 is arranged in connection with the hydraulic cylinder 23, and the measurement result obtained therefrom is transmitted via the line 37 to the control unit 33.
• Figs. 3a and 3b can also be implemented without the control unit and the feedback from the actuator thereto. If several valves have been coupled together, the control unit is necessary to be able to control the valves synchronically in the desired manner, for example in 3/2, 4/2 or 5/2 way. By means of the control unit it is also possible to implement the control of the valve/valves in the desired manner, for example proportionally, in a servo-type manner or on/off manner.
• Fig. 4 shows an embodiment of the invention as a 4/2 valve.
• the control valve 14 shown in the figure comprises a valve frame 15. Inside the frame a magnet 16 has been arranged, around which the coil 17 of the magnet has been wound. Electric current is supplied to the magnet via a conductor 18. A control member 19 is at least partly in contact with the magnet, and a coil 20 is arranged around the same. For the control current supplied to the coil, conductors 21a and 21b are connected thereto. The volume flow of the medium supplied by the valve 14 to the actuator is controlled by adjusting the quantity and direction of the control current supplied by the control member 19 to the coil 20.
• the valve 14 For supplying pressurized medium to the valve 14, it is provided with a lead-through for the flow channel 29. It extends continuously through the entire valve, and it is divided into an inflow channel 29a and an outflow channel 29b by means of a blocking plug 46.
• the inflow channel 29a is partly surrounded by a magnet 16.
• the outflow channel 29b is surrounded by the frame.
• two outflow chambers 22a and 22b are arranged in the valve 14.
• a lead-through 44 is arranged to guide the medium 44 to the first outflow chamber 22a.
• a lead-through 45 is arranged to guide the medium to the second outflow chamber 22b.
• the lead- throughs operate as flow guides for the valve.
• the cylindrical control member 19 is arranged to move in the outflow chambers 22a and 22b.
• the length of the control member 19 is selected in such a manner that it extends from the first outflow chamber 22a to the second outflow chamber 22b, wherein a part of its length is in contact with the surface of the magnet 16.
• the control member is installed in such a manner that it surrounds the flow channel 29.
• the coil 20 wound on the surface of the control member 19 is thus located inside the second outflow chamber 22a, surrounded by the medium contained therein.
• Flow channels 47 are arranged on the inner surface of the control member 19, said flow channels guiding the medium from the inflow channel 29a and/or outflow channel 29b to the outflow chambers 22a and 22b.
• the flow channels 47 can be grooves, or holes penetrating the control member.
• the flow of the medium is guided by moving the control member 19 in accordance with the arrow marked in the Figure. In the situation shown in the Figure, the control member 19 is in such a position that there is no flow of the medium via the flow guides 44 and 45 to the outflow chambers 22a and 22b. When the control member 19 is moved in either direction, the medium is capable of flowing via the lead-through 44 and a flow channel 47 from the inflow channel 29a to the first outflow chamber 22a.
• the flow of the medium via the lead- through 45 and the flow channel 47 from the outflow channel 29b to the second outflow chamber 22 is controlled in a corresponding manner. It is also possible to move the control member in such a position that the medium is at the same time capable of flowing via both flow guides 44 and 45 to the outflow chambers 22a and 22b.
• the outflow chambers 22a and 22b are connected to the outflow channels 26a and 26b guiding the medium to the actuator.
• the valve is also provided with springs 31 enhancing the movement of the control member.
• Fig. 5 shows a combustion engine 50 provided with an actuator damping its vibrations, in which a valve according to the invention is used.
• the combustion engine can be a motor installed in a vehicle, such as a car or a vessel.
• the actuator 51 that can also be called a valve motor, includes a motor 52 and a valve 14.
• the valve motor comprises a rotating, eccentric mass whose speed of rotation is altered so that the vibrations of the combustion engine can be damped.
• the parameters describing the operation of the com- bustion engine are measured by means of a measuring sensor 53, and said measurement information is transmitted to the control unit 54.
• the control unit 54 controls the control valve 14 on the basis of the measuring information of the sensor, and generates the desired flow of pressurized medium to the motor 52.
• Fig. 6 shows in general the principle of damping the vibrations of a target 60, in which vibrations are damped by means of a separate actuator.
• the target 60 can be any vibrating target, such as a motor, a building or its foundations, or any machine or machine part.
• Three actuators 61 are connected to the target 60.
• the actuators can be hydraulic cylinders, as shown in the figures, or any devices using pressurized medium to generate movement, such as motors and pumps.
• the amount of pressurized medium supplied to the actuators is controlled by means of valves 62.
• the valves are shown schematically only, and they may contain one or more control valves according to the invention connected to each other in a suitable manner.
• the parameters describing the function and vibrations of the target 60 are measured by means of a sensor 63 arranged in connection with the target, and said measurement information is transmitted to the control unit 64.
• the control unit 64 controls the control valves 62 on the basis of the measurement information of the sensor, and generates the desired flow of pressurized medium to the actuators 61.
• the movement generated by the actuators 61 dampens the vibrations of the target.
• Fig. 7 shows an embodiment of the invention.
• the control valve 14 shown in the figure comprises a valve frame 15.
• the frame 15 is provided with a lead-through for the flow channel 29. It extends continuously through the entire valve, and it is divided into an inflow channel 29a and an outflow channel, i.e. a tank channel 29b by means of a blocking plug 46.
• first magnet 16a There are two magnets arranged inside the frame, a first magnet 16a and a second magnet 16b.
• the coils 17a and 17b of the magnets have been wound around the magnets.
• the first magnet 16a partly surrounds the inflow channel 29a and the second magnet 16b partly surrounds the tank channel 29b. Electric current is supplied to the first magnet 16a via a first conductor 18a, and electric current is supplied to the second magnet via a second conductor 18b.
• a control member 70 surrounding the flow channel 29 is at least partly in contact with both magnets 16a and 16b.
• the inner surface of the first end 70a of the control member 70 is in contact with the surface of the first magnet 16a, and the inner surface of the second end 70b of the control member is in contact with the surface of the second magnet 16b.
• a first coil 20a is arranged around the first end 70a of the control member 70, and within a distance from the same, a second coil 20b is arranged around the second end 70b of the control member 19.
• conductors 21a' and 21a" are connected thereto.
• To the second coil 20b electric current is conducted via conductors 21 b 1 and 21 b".
• the volume flow of the medium supplied by the valve 14 to the actuator is controlled by controlling the quantity and direction of the control current supplied by the control member 70 to the first coil 20a and/or to the second coil 20b.
• an outflow chamber 22 surrounding the flow channel 29 is arranged.
• a lead- through 44 is arranged to guide the medium to the outflow chamber 22.
• a lead-through 71 is arranged to guide the medium from the outflow chamber 22 to the tank channel 29b.
• the lead-throughs 44 and 71 operate as flow guides for the valve.
• the cylindrical control member 70 is arranged to move in the outflow chamber 22.
• the length of the control member 70 is selected in such a manner that it extends over the length of the outflow chamber 22.
• the first coil 20a and the second coil 20b wound on the surface of the control member 70 are at least partly inside the outflow chamber 22, surrounded by the medium contained therein.
• a flow channel 47 is arranged, said flow channel guiding the medium from the inflow channel 29a to the outflow chamber 22.
• the flow channel 47 can be a groove formed on the surface of the control member 60, or a hole penetrating the control member.
• the flow of the medium is also guided from the outflow chamber 22 to the outflow channel 29b via a lead-through 71 arranged in the outflow channel and via the flow channel 47.
• the flow of the medium is guided by moving the control member 70 in accordance with the arrow marked in the Figure.
• the control member 70 is in such a position that there is no flow of the medium via the flow guide 44 and the flow channel 47 to the outflow chamber 22.
• the control member 70 is moved in the direction of the first magnet 16a, the medium is capable of flowing via the lead-through 44 and the flow channel 47 from the inflow channel 29a to the outflow chamber 22.
• the outflow chamber 22 is connected to the outflow channel 26a guiding the medium to the actuator.
• the control member 70 is moved in the direction of the second magnet 16b, the medium is capable of flowing via the flow channel 47 the lead- through 71 to the tank channel 29b.
• the valve is also provided with at least one spring 31 enhancing the movement of the control member.
• the position of the control member 70 can be adjusted either by supplying control current to both coils 20a and 20b simultaneously, or by supplying control current only to the first coil 20a or to the second coil 20b.
• the coil wound around the control member can be formed for example by winding litz wire or aluminium foil around the stem of the valve.
• Advantageously litz wire is used, which is a very strong coil material. When litz wire is use, it is possible to utilize higher control frequencies and still the losses are smaller.
• As a coil material it is also possible to use other conductor materials as a wire comprising one or several threads.
• control valve By means of the control valve it is possible to control various kinds of media. Liquids, gases and liquid-gas mixtures can be controlled. Thus, it is possible to use the control valve to guide the medium both to hydraulic and pneumatic actuators.
• the control valve can be used in a number of actuator embodiments, in which fast closing impulses for the supply of the medium are required. It can be utilized to guide the medium to actuators arranged in different kinds of targets to dampen vibrations. Such targets are for example foundations of buildings subjected to vibrations caused by the movements of the ground or busy traffic. By means of the actuators it is also possible to dampen the vibrations generated in foundations by the operation of the devices. It is also possible to arrange actuators in bridge constructions to dampen the vibrations generated therein. Furthermore, actuators can be arranged in the chassis structures of cars and vessels to dampen the vibrations generated therein.
• the control valve can also be used for fast supply of medium in actuators arranged in connection with cylinder-controlled machines, such as for example machining centres. Thus, rapid positioning of the machine tool can be attained.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Acoustics & Sound (AREA)
• Aviation & Aerospace Engineering (AREA)
• Magnetically Actuated Valves (AREA)

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Citations (5)

• 2006
  • 2006-03-28 FI FI20065204A patent/FI20065204L/fi not_active Application Discontinuation
• 2007
  • 2007-03-28 WO PCT/FI2007/050171 patent/WO2007110487A1/en active Application Filing
  • 2007-03-28 EP EP07730658A patent/EP2005046A1/en not_active Withdrawn

Patent Citations (5)

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