WO2010012866A1 - Rotating apparatus - Google Patents

Rotating apparatus Download PDF

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Publication number
WO2010012866A1
WO2010012866A1 PCT/FI2009/050639 FI2009050639W WO2010012866A1 WO 2010012866 A1 WO2010012866 A1 WO 2010012866A1 FI 2009050639 W FI2009050639 W FI 2009050639W WO 2010012866 A1 WO2010012866 A1 WO 2010012866A1
Authority
WO
WIPO (PCT)
Prior art keywords
chamber
channel
actuator
axle
filter
Prior art date
Application number
PCT/FI2009/050639
Other languages
French (fr)
Inventor
Mikko Nieminen
Petteri Kapanen
Antti Sorri
Original Assignee
Parker Hannifin Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Parker Hannifin Oy filed Critical Parker Hannifin Oy
Publication of WO2010012866A1 publication Critical patent/WO2010012866A1/en

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Classifications

    • 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
    • F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
    • F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
    • F15B9/08—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
    • F15B9/12—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor in which both the controlling element and the servomotor control the same member influencing a fluid passage and are connected to that member by means of a differential gearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
    • B01D29/682—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with a rotary movement with respect to the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
    • B01D29/688—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with backwash arms or shoes acting on the cake side
    • 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
    • F16K31/08—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet

Definitions

  • the invention relates to hydraulics and pneumatics and concerns a rotating apparatus.
  • the invention can be used especially for rotating washing arms in a filter with several parallel tubular filter elements, which are alternately cleaned automatically with filtered liquid by washing them upstream.
  • the filter can be used especially for cleaning lubricating oil, for example, in motors.
  • a filter of the kind mentioned above is known, for example, from the patent specification FI 107021 (corresponds e.g. to the specification US 6 827 864).
  • the filter elements are closed in the middle with a partition.
  • the liquid to be filtered is brought into the elements from both ends.
  • the elements are arranged as a circle around a hollow middle axle.
  • the channel of the middle axle leads to a reject tank outside the filter chamber.
  • Hollow washing arms circulating in a stepped manner are connected to the upper and lower ends of the middle axle, setting alternately to the end of each element.
  • the freewheel clutch In the upper end of the middle axle there is a freewheel clutch above the filter chamber, the clutch rotating the axle to one direction only.
  • the freewheel clutch has an arm in the direction of the radius and articulated to the piston rod of a hydraulic cylinder.
  • the piston is directed to perform reciprocating motion by means of pressure difference between the filtrate part and the washing part.
  • the control equipment has a main valve and two control valves controlling it.
  • the rotating apparatus can be fitted, for example, to rotate an axle by means of a freewheel clutch.
  • the actuator can be, for example, a hydraulic cylinder or motor, especially a hydraulic cylinder.
  • the control valve has a reciprocally movable closing organ.
  • the actuator has a magnet and the closing organ has a second magnet so that they cause a repulsion force resisting the movement of the piston.
  • the repulsion force together with the friction forces resisting the movement of the actuator is nevertheless smaller than the force, which is targeted to the actuator by pressure.
  • the magnets have thus been fitted so that as the actuator reaches its one extreme position, the direction of the repulsion force is reversed, causing the closing organ to move to its second extreme position.
  • the control valve is at best a mandrel valve.
  • control valve and the actuator can be integrated into the same unit.
  • the hydrostatic control system according to the invention is above all reliable, as the closing organ cannot remain at a dead point between its positions. There is only need for one valve in the arrangement.
  • the magnet especially the magnet for the closing organ, can consist of several successive magnets. By altering the distance between the magnets it is possible to adjust the effective force.
  • Both magnets are preferably ring magnets so that they are pressed into each other at best so that the magnet of the actuator is pushed on the magnet of the closing organ.
  • the rotating apparatus can have a spring, which resists free motion, nevertheless, without preventing it.
  • the spring is charged with energy during the free motion, the energy being then released for the benefit of work motion.
  • the apparatus operates with a smaller pressure difference.
  • the spring can especially be a mechanical spring.
  • the spring can be, for example, a spring placed inside the cylinder.
  • the rotating apparatus is especially suitable to be used for rotating washing arms in a filter of the type described above.
  • the filter has in a filter chamber several tubular filter elements that are shorter than the chamber jacket, placed parallel on the circumference at equal distances.
  • the elements are open from both ends. They are at best closed in the middle.
  • the elements can be located in one or several circumferences.
  • the elements are connected with each other at their ends with ring flanges, which are fastened tightly to the chamber jacket and which are connected tightly with an inner jacket inside the elements, at a distance from the elements so that an entry side has been formed at the ends and in the middle of the chamber and discharge side to the lateral side.
  • the axle In the middle of the filter chamber the axle, the ends of which extend through the chamber bottoms and inside of which there is a channel leading out from one of the chamber to a pressure, which is lower than the pressure in the chamber.
  • the washing arms are rotated automatically by means of the rotating apparatus of the invention, which rotates the axle by means of the freewheel clutch.
  • the cylinder is at best controlled with a valve, the inlet channel of which is connected to the filter chamber and the discharge channel to the rinsing channel.
  • the inlet channel is preferably connected to the side so that the pressure difference is biggest.
  • the pressure difference is typically 0.2 - 6 bar.
  • the valve can also be connected to a separate hydraulic circuit.
  • the energy needed to rotate the washing arms is conveniently obtained from the pressure difference between the filter chamber and the rinsing chamber. There is no pressure loss caused to the main flow.
  • the stepping speed can be adjusted irrespective of the flow of the liquid to be filtered. There is no need for external energy.
  • the invention is especially well suitable for the filtering of lubricating oil, especially lubricating oil circulating in a motor.
  • the object of use can especially be a diesel motor of a ship.
  • Other especially suitable applications are the filtering of liquid fuels and hydraulic liquids.
  • fig. 1 illustrates a filter with the filter chamber opened;
  • fig. 2 illustrates the upper end of the filter chamber with the upper face removed;
  • fig. 3 is a top view of the rotating apparatus on top of the upper face;
  • fig. 4 is a sectional front view of the upper face and the rotating apparatus;
  • fig. 5 is a front view of the upper face and the rotating apparatus;
  • fig. 6 is a partly cut front view of the rotating apparatus on top of the upper face;
  • figs 7 and 8 illustrate partial enlargements of fig. 6;
  • fig. 9 is a back view of the upper face and the rotating device;
  • fig. 10 is a top sectional view of fig. 9; and
  • fig. 11 illustrates a second section from the top.
  • the oil filter according to figures 1 and 2 has tubular filter elements 21 located at equal intervals on the circumference in a circular cylindrical filter chamber 20.
  • the elements are closed in the middle.
  • At both ends of the elements there is a ring flange 22 that connects them.
  • the outer edge of the flanges is tightly attached to the side wall of the chamber.
  • the flanges are tightly connected at their inner edge by an inner jacket 23 at a distance from the inner edge of the elements.
  • the oil to be filtered is pumped from the feed assembly 24 to the lower part of the chamber. Part of the oil enters directly into the filter elements from their lower ends, whilw part flows to the upper part of the chamber from the interior of the inner jacket and from there into the filter elements from the upper ends.
  • the filtered oil is discharged from the filtrate part at the side of the chamber from the discharge assembly 25.
  • a hollow axle 9 In the middle of the filter chamber 20 there is located a hollow axle 9, the ends of which extend out of the ends of the chamber.
  • a hollow upper washing arm 26 In the upper part of the chamber a hollow upper washing arm 26 is connected to the axle in the radial direction, the outer end of the arm containing a sleeve sealed against the upper flange 22 at the place of the filter elements 21.
  • a rinsing channel leads from the washing arms through the axle to below the bottom of the filter to a rinsing tank below the lower part. The pressure of the filtrate part is bigger than that of the rinsing tank.
  • the rotating apparatus comprises a freewheel clutch 10 and a wheel 8 fitted to the end of the axle 9, in the side of the axle a transverse hydraulic cylinder 4, the piston 6 of which is articulated from its one end with a transverse lever 7, which is further articulated between its ends to the cylinder jacket and from the opposite end to the wheel (see fig. 10).
  • the piston moves to one direction (upwards in fig. 10)
  • the axle rotates clockwise.
  • the step of this work motion has been fitted so that the washing arms 26, 27 transfer with a certain number of steps from the place of the filter element 21 to the place of the next filter element.
  • the axle is not moving, i.e. a free motion is performed.
  • the control valve of the rotating apparatus has an inlet channel 2 connected from the seat to the upper part of the filter chamber 20, two actuating channels 5, the one of which is connected to the side of the end of the piston 6 and the second one being connected to the side of the arm, a discharge channel 12 connected to the casing 28, and a stem 16 fitted to move reciprocally in the direction of the piston rod.
  • a connection from the inlet channel to the side of the piston rod (fig. 8) and from the side of the piston end to the discharge channel.
  • the other extreme position of the piston there is again a connection from the inlet channel to the side of the piston end and from the side of the rod to the discharge channel.
  • the valve inlet channel 2 is connected through the upper face of the filter chamber 20 to the channel 1 leading to the upper part of the chamber. From the casing 28 there is a connection to the rinsing channel through the upper end of the axle 9. Thus the pressure of the inlet channel is bigger than that of the discharge channel.
  • the pressure difference can be, for example, 0.2 - 6 bar.
  • a transverse bar 13 is attached to the rod of the piston 6, the outer end of the bar comprising an annular piston magnet 14, which is fitted around the stem 16.
  • an annular stem magnet 15 (length L) is attached to the stem, the magnet comprising several successive ring magnets with parallel poles.
  • the poles of the piston magnet and the stem magnet are located in opposite directions so that the magnets repel each other and there is generated a repulsion force, which resists the pushing of the piston magnet inside the stem magnet.
  • the direction of the repulsion force changes as the midpoints of the magnets meet, and the stem is automatically moved to its other extreme position.
  • the extreme limits of the stem have been restricted by attenuators 17, one meeting the end in the side of the face of the valve cylinder and the other the support attached to the bottom of the casing 28.
  • the magnets have been dimensioned and fitted so that the force directed to the piston by the pressure difference between the inlet channel 2 and the discharge channel 12 is bigger than the repulsion force of the magnets and the friction forces opposing the motion, and that the position of the stem changes every time as the piston reaches its extreme position.
  • the piston performs automatically a continuous reciprocating motion.
  • the stem 16 When the piston 6 is at the end facing the piston rod of the cylinder 4, the stem 16 is in its extreme position facing the piston end. Oil then flows to the cylinder to the end facing the piston rod, the piston moves towards the second end of the cylinder 4 performing a free motion in which the axle 9 is not rotating.
  • the midpoints of the magnets 14, 15 meet each other, the direction of the discharge force changes and the stem moves to its second extreme position by the influence of the reversed force. In this case oil flows to the side facing the piston end and the piston moves to the opposite direction performing a work motion in which the axle is rotated.
  • the attenuators 17 attenuate the face stroke of the stem.
  • a conical compression spring 29 is located at the side facing the end of the piston 6 in the cylinder 4.
  • the spring can be located, for example, between the bar 13 and the cylinder face.

Abstract

The invention relates to a rotating apparatus, which comprises a hydraulic or pneumatic actuator (4, 5) movable back and forth, a control valve with an inlet channel connected to pressure, a discharge channel connected to smaller pressure, an actuating channel connected to both sides of the actuator, and a closing organ (16) movable between a first and second position. The actuator has a magnet (14) and the closing organ has a magnet (15) so that they cause a discharge force, which resists the motion of the actuator. Due to the pressure difference and the magnets the closing apparatus and the actuator perform automatically a reciprocating motion.

Description

Rotating apparatus
Description
Technical field
The invention relates to hydraulics and pneumatics and concerns a rotating apparatus. The invention can be used especially for rotating washing arms in a filter with several parallel tubular filter elements, which are alternately cleaned automatically with filtered liquid by washing them upstream. The filter can be used especially for cleaning lubricating oil, for example, in motors.
Technical background
A filter of the kind mentioned above is known, for example, from the patent specification FI 107021 (corresponds e.g. to the specification US 6 827 864). In this filter the filter elements are closed in the middle with a partition. The liquid to be filtered is brought into the elements from both ends. The elements are arranged as a circle around a hollow middle axle. The channel of the middle axle leads to a reject tank outside the filter chamber. Hollow washing arms circulating in a stepped manner are connected to the upper and lower ends of the middle axle, setting alternately to the end of each element. When the pressure in the filtrate side of the jacket is bigger than that of the reject tank, filtrate flows from the jacket through the filter element, via the washing arm and middle axle to the reject tank. In the upper end of the middle axle there is a freewheel clutch above the filter chamber, the clutch rotating the axle to one direction only. The freewheel clutch has an arm in the direction of the radius and articulated to the piston rod of a hydraulic cylinder. The piston is directed to perform reciprocating motion by means of pressure difference between the filtrate part and the washing part. The control equipment has a main valve and two control valves controlling it.
General description of the invention
Now there has been invented a rotating apparatus and its use in a filtering method according to independent patent claims.
The rotating apparatus can be fitted, for example, to rotate an axle by means of a freewheel clutch. The actuator can be, for example, a hydraulic cylinder or motor, especially a hydraulic cylinder.
The control valve has a reciprocally movable closing organ. The actuator has a magnet and the closing organ has a second magnet so that they cause a repulsion force resisting the movement of the piston. The repulsion force together with the friction forces resisting the movement of the actuator is nevertheless smaller than the force, which is targeted to the actuator by pressure. The magnets have thus been fitted so that as the actuator reaches its one extreme position, the direction of the repulsion force is reversed, causing the closing organ to move to its second extreme position. The control valve is at best a mandrel valve.
The control valve and the actuator can be integrated into the same unit.
The hydrostatic control system according to the invention is above all reliable, as the closing organ cannot remain at a dead point between its positions. There is only need for one valve in the arrangement.
The magnet, especially the magnet for the closing organ, can consist of several successive magnets. By altering the distance between the magnets it is possible to adjust the effective force.
Both magnets are preferably ring magnets so that they are pressed into each other at best so that the magnet of the actuator is pushed on the magnet of the closing organ.
The rotating apparatus can have a spring, which resists free motion, nevertheless, without preventing it. Thus the spring is charged with energy during the free motion, the energy being then released for the benefit of work motion. Thus, the apparatus operates with a smaller pressure difference. The spring can especially be a mechanical spring. When using a hydraulic or pneumatic cylinder, the spring can be, for example, a spring placed inside the cylinder.
The rotating apparatus is especially suitable to be used for rotating washing arms in a filter of the type described above. The filter has in a filter chamber several tubular filter elements that are shorter than the chamber jacket, placed parallel on the circumference at equal distances. The elements are open from both ends. They are at best closed in the middle. The elements can be located in one or several circumferences. The elements are connected with each other at their ends with ring flanges, which are fastened tightly to the chamber jacket and which are connected tightly with an inner jacket inside the elements, at a distance from the elements so that an entry side has been formed at the ends and in the middle of the chamber and discharge side to the lateral side.
In the middle of the filter chamber the axle, the ends of which extend through the chamber bottoms and inside of which there is a channel leading out from one of the chamber to a pressure, which is lower than the pressure in the chamber. On the side of both ends of the filter elements there is at least one washing arm attached to the axle, the arm comprising a channel connected with the axle channel, the outer end of which can be set tightly against the end of element so that there is formed a rinsing channel leading from the element outside the filter chamber. If there are elements in several circumferences, there is at least one washing arm for each periphery.
The washing arms are rotated automatically by means of the rotating apparatus of the invention, which rotates the axle by means of the freewheel clutch. The cylinder is at best controlled with a valve, the inlet channel of which is connected to the filter chamber and the discharge channel to the rinsing channel. The inlet channel is preferably connected to the side so that the pressure difference is biggest. The pressure difference is typically 0.2 - 6 bar. However, the valve can also be connected to a separate hydraulic circuit.
The energy needed to rotate the washing arms is conveniently obtained from the pressure difference between the filter chamber and the rinsing chamber. There is no pressure loss caused to the main flow. The stepping speed can be adjusted irrespective of the flow of the liquid to be filtered. There is no need for external energy.
The invention is especially well suitable for the filtering of lubricating oil, especially lubricating oil circulating in a motor. The object of use can especially be a diesel motor of a ship. Other especially suitable applications are the filtering of liquid fuels and hydraulic liquids.
Drawings
The enclosed drawings are part of the written description of the invention and they are related to the detailed description of some embodiments of the invention illustrated below. In the drawings fig. 1 illustrates a filter with the filter chamber opened; fig. 2 illustrates the upper end of the filter chamber with the upper face removed; fig. 3 is a top view of the rotating apparatus on top of the upper face; fig. 4 is a sectional front view of the upper face and the rotating apparatus; fig. 5 is a front view of the upper face and the rotating apparatus; fig. 6 is a partly cut front view of the rotating apparatus on top of the upper face; figs 7 and 8 illustrate partial enlargements of fig. 6; fig. 9 is a back view of the upper face and the rotating device; fig. 10 is a top sectional view of fig. 9; and fig. 11 illustrates a second section from the top.
Detailed description of some embodiments of the invention
The oil filter according to figures 1 and 2 has tubular filter elements 21 located at equal intervals on the circumference in a circular cylindrical filter chamber 20. The elements are closed in the middle. At both ends of the elements there is a ring flange 22 that connects them. The outer edge of the flanges is tightly attached to the side wall of the chamber. The flanges are tightly connected at their inner edge by an inner jacket 23 at a distance from the inner edge of the elements. The oil to be filtered is pumped from the feed assembly 24 to the lower part of the chamber. Part of the oil enters directly into the filter elements from their lower ends, whilw part flows to the upper part of the chamber from the interior of the inner jacket and from there into the filter elements from the upper ends. The filtered oil is discharged from the filtrate part at the side of the chamber from the discharge assembly 25.
In the middle of the filter chamber 20 there is located a hollow axle 9, the ends of which extend out of the ends of the chamber. In the upper part of the chamber a hollow upper washing arm 26 is connected to the axle in the radial direction, the outer end of the arm containing a sleeve sealed against the upper flange 22 at the place of the filter elements 21. In the lower part of the chamber there is a similar lower washing arm 27. A rinsing channel leads from the washing arms through the axle to below the bottom of the filter to a rinsing tank below the lower part. The pressure of the filtrate part is bigger than that of the rinsing tank. When the washing arm is at the place of a certain filter element, filtrate flows thus from the filtrate part back to this filter element and further through the washing arm and axle to the rinsing tank. Thus the filter element is cleaned by backflushing. The axle is turned in a stepped manner so that the washing arm is located alternately at the place of each filter element. The rotating apparatus is located above the upper face of the chamber into a casing 28. The energy needed for the rotation is obtained from the pressure difference prevailing between the inlet side of the filter and the rinsing chamber.
The rotating apparatus comprises a freewheel clutch 10 and a wheel 8 fitted to the end of the axle 9, in the side of the axle a transverse hydraulic cylinder 4, the piston 6 of which is articulated from its one end with a transverse lever 7, which is further articulated between its ends to the cylinder jacket and from the opposite end to the wheel (see fig. 10). When the piston moves to one direction (upwards in fig. 10), the axle rotates clockwise. The step of this work motion has been fitted so that the washing arms 26, 27 transfer with a certain number of steps from the place of the filter element 21 to the place of the next filter element. When the piston moves to the opposite direction, the axle is not moving, i.e. a free motion is performed.
The control valve of the rotating apparatus has an inlet channel 2 connected from the seat to the upper part of the filter chamber 20, two actuating channels 5, the one of which is connected to the side of the end of the piston 6 and the second one being connected to the side of the arm, a discharge channel 12 connected to the casing 28, and a stem 16 fitted to move reciprocally in the direction of the piston rod. In one extreme position of the stem there is a connection from the inlet channel to the side of the piston rod (fig. 8) and from the side of the piston end to the discharge channel. In the other extreme position of the piston there is again a connection from the inlet channel to the side of the piston end and from the side of the rod to the discharge channel.
The valve inlet channel 2 is connected through the upper face of the filter chamber 20 to the channel 1 leading to the upper part of the chamber. From the casing 28 there is a connection to the rinsing channel through the upper end of the axle 9. Thus the pressure of the inlet channel is bigger than that of the discharge channel. The pressure difference can be, for example, 0.2 - 6 bar.
A transverse bar 13 is attached to the rod of the piston 6, the outer end of the bar comprising an annular piston magnet 14, which is fitted around the stem 16. Respectively, an annular stem magnet 15 (length L) is attached to the stem, the magnet comprising several successive ring magnets with parallel poles. The poles of the piston magnet and the stem magnet are located in opposite directions so that the magnets repel each other and there is generated a repulsion force, which resists the pushing of the piston magnet inside the stem magnet. When the piston magnet is still being pushed inside the stem magnet, the direction of the repulsion force changes as the midpoints of the magnets meet, and the stem is automatically moved to its other extreme position. The extreme limits of the stem have been restricted by attenuators 17, one meeting the end in the side of the face of the valve cylinder and the other the support attached to the bottom of the casing 28. The magnets have been dimensioned and fitted so that the force directed to the piston by the pressure difference between the inlet channel 2 and the discharge channel 12 is bigger than the repulsion force of the magnets and the friction forces opposing the motion, and that the position of the stem changes every time as the piston reaches its extreme position. Thus the piston performs automatically a continuous reciprocating motion.
When the piston 6 is at the end facing the piston rod of the cylinder 4, the stem 16 is in its extreme position facing the piston end. Oil then flows to the cylinder to the end facing the piston rod, the piston moves towards the second end of the cylinder 4 performing a free motion in which the axle 9 is not rotating. When the midpoints of the magnets 14, 15 meet each other, the direction of the discharge force changes and the stem moves to its second extreme position by the influence of the reversed force. In this case oil flows to the side facing the piston end and the piston moves to the opposite direction performing a work motion in which the axle is rotated. The attenuators 17 attenuate the face stroke of the stem.
In accordance with fig. 10, a conical compression spring 29 is located at the side facing the end of the piston 6 in the cylinder 4. Thus energy is charged to it during the free motion, the energy being utilised in the work motion. Alternatively, the spring can be located, for example, between the bar 13 and the cylinder face.

Claims

Claims
1. Rotating apparatus, which comprises
- a hydraulic or pneumatic actuator (4, 6) movable back and forth and provided with a first side and a second side to which hydraulic liquid or pneumatic gas can be led and from which it can be discharged,
- a control valve with an inlet channel (2) connected to pressure, a discharge channel connected to a smaller pressure, an actuating channel (5) connected to the both sides, and a closing organ (16) movable between a first and a second position so that in the first position of the closing organ the inlet channel is connected to the first side of the actuator and the discharge channel to the second side, and in the second position the inlet channel is connected to the second side of the actuator and the discharge channel to the first side,
characterised in that
- the actuator (4, 6) has a magnet (14) and the closing organ (16) has a magnet (15) so that they cause a repulsion force, which resists the motion of the actuator and which together with the friction forces resisting the motion of the actuator is smaller than the force directed to the actuator and moving the apparatus.
2. Apparatus according to claim 1, in which the actuator (4, 6) is fitted to rotate an axle (9) through a freewheel clutch.
3. Apparatus according to claim 1 or 2, in which the actuator (4, 6) is a hydraulic cylinder.
4. Apparatus according to claim 2 or 3, in which there is provided a spring (29) resisting the free motion of the freewheel clutch.
5. Apparatus according to any of the claims 1 - 4, in which the magnets (14, 15) become nested when the actuator is moving.
6. Apparatus according to any of the claims 1 - 5, in which the magnet (14) of the actuator is a ring magnet or the magnet (15) of the closing organ is a ring magnet.
7. Apparatus according to any of the claims 2 - 6 in a filter, in which there is
- a filter chamber (20) with a lower bottom and an upper bottom and a jacket connecting these,
- the filter chamber comprising several tubular filter elements (21) which are shorter than the jacket and which are located on the circumference at equal distances, the elements being connected from their ends with ring flanges (22) which are tightly attached to the chamber jacket and which are at the interior of the inner edge of the elements tightly connected with an inner jacket (23), so that an entry side is formed in the chamber to its faces and middle and a discharge side is formed to the side,
- a feed assembly (24) leading to the entry side for the liquid to be filtered and a discharge assembly (25) for the filtrate leading away from the chamber in the discharge side,
- an axle (9) in the middle of the filter chamber, the ends of which extend through the chamber bases and the interior of which is provided with a channel leading out from one end of the chamber to a pressure which is lower than that of the chamber,
- one or several washing arms (26, 27) attached to the axle at both ends of the filter elements, each arm comprising a channel connected to the axle channel, the outer end of the channel being connectable tightly against the head of the element so that a rinsing channel is formed leading from the element outside the filter chamber,
- a freewheel clutch (10) on the axle (9)
so that
- the actuator (4, 6) is fitted to rotate the axle (9) by means of the freewheel clutch (10).
8. Apparatus according to claim 7, in which the inlet channel (2) for the control valve is connected to the input side of the filter chamber.
9. Filtering method, in which the liquid to be filtered is fed to a filter, which has
- a filter chamber (20) with a lower bottom and an upper bottom and a jacket connecting these;
- the filter chamber comprising several tubular filter elements (21) that are shorter than the jacket and that are located on a circumference at equal distances, the elements being connected from their ends with ring flanges (22) which are tightly attached to the chamber jacket and which are at the interior of the inner edge of the elements tightly connected with an inner jacket (23), so that an inlet side is formed in the chamber to its faces and middle and a discharge side is formed to the side,
- a feed assembly (24) leading to the input side for the liquid to be filtered and a discharge assembly (25) for the filtrate leading away from the chamber in the discharge side,
- an axle (9) in the middle of the filter chamber, the ends of which extend through the chamber bottoms and the interior of which is provided with a channel leading out from the one end of the chamber to a pressure which is lower than that of the chamber,
- a washing arm (26, 27) is connected to the axle at both ends of the filter elements, the arm comprising a channel connected to the axle channel, the outer end of the channel being connectable tightly against the element's head so that a rinsing channel is formed leading from the element outside the filter chamber so that filtrate travels upstream to the rinsing channel through the filter element, to the end of which the washing arm is placed,
- a freewheel clutch (10) on the axle (9),
characterised in that
- the axle (9) is rotated by means of the freewheel clutch (10) using the apparatus according to one of the claims 1 — 8.
10. Method according to claim 9, in which the liquid to be filtered is lubricating oil circulating in a motor.
PCT/FI2009/050639 2008-07-29 2009-07-29 Rotating apparatus WO2010012866A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20085748A FI121367B (en) 2008-07-29 2008-07-29 Rotary device and filtration method applying it
FI20085748 2008-07-29

Publications (1)

Publication Number Publication Date
WO2010012866A1 true WO2010012866A1 (en) 2010-02-04

Family

ID=39677624

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2009/050639 WO2010012866A1 (en) 2008-07-29 2009-07-29 Rotating apparatus

Country Status (2)

Country Link
FI (1) FI121367B (en)
WO (1) WO2010012866A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1253415A (en) * 1986-09-18 1989-05-02 Roland Neirynck Combined servo control and jack unit
US6827864B2 (en) * 1999-09-20 2004-12-07 Parker Hannifin Oy Filtering apparatus and method for washing its filtering elements
WO2005072845A1 (en) * 2004-01-30 2005-08-11 Hydac Process Technology Gmbh Filter device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1253415A (en) * 1986-09-18 1989-05-02 Roland Neirynck Combined servo control and jack unit
US6827864B2 (en) * 1999-09-20 2004-12-07 Parker Hannifin Oy Filtering apparatus and method for washing its filtering elements
WO2005072845A1 (en) * 2004-01-30 2005-08-11 Hydac Process Technology Gmbh Filter device

Also Published As

Publication number Publication date
FI121367B (en) 2010-10-29
FI20085748A (en) 2010-01-30
FI20085748A0 (en) 2008-07-29

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