WO2011096397A1 - 油タンク - Google Patents
油タンク Download PDFInfo
- Publication number
- WO2011096397A1 WO2011096397A1 PCT/JP2011/052042 JP2011052042W WO2011096397A1 WO 2011096397 A1 WO2011096397 A1 WO 2011096397A1 JP 2011052042 W JP2011052042 W JP 2011052042W WO 2011096397 A1 WO2011096397 A1 WO 2011096397A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oil
- stored
- return
- tank body
- tank
- Prior art date
Links
Images
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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/26—Supply reservoir or sump assemblies
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/044—Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/047—Preventing foaming, churning or cavitation
-
- 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
- F16N—LUBRICATING
- F16N19/00—Lubricant containers for use in lubricators or lubrication 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
- F16N—LUBRICATING
- F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
- F16N39/002—Arrangements for conditioning of lubricants in the lubricating system by deaeration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/2931—Diverse fluid containing pressure systems
- Y10T137/3003—Fluid separating traps or vents
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/85954—Closed circulating system
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86187—Plural tanks or compartments connected for serial flow
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86187—Plural tanks or compartments connected for serial flow
- Y10T137/86212—Plural compartments formed by baffles
Definitions
- the present invention relates to an oil tank that is installed in a hydraulic circuit including a hydraulic pump that supplies hydraulic pressure oil to hydraulic equipment such as a hydraulic cylinder and a hydraulic motor, and to which the hydraulic pump is connected.
- Hydraulic equipment used for power sources of various sluice facilities such as factory production equipment and construction machinery or estuary weirs, sluice gates installed in rivers, dam discharge gates, etc.
- a hydraulic circuit comprising an actuator (hydraulic cylinder, hydraulic motor, etc.) for driving equipment such as a sluice, a weir, etc., a control valve for supplying and discharging hydraulic pressure oil to the actuator, and an oil pump for generating hydraulic pressure oil;
- the hydraulic pump is configured to include oil sucked by a hydraulic pump that supplies hydraulic pressure oil to the hydraulic circuit, and an oil tank that stores return oil that returns from the hydraulic circuit.
- the hydraulic circuit performs flushing (hereinafter referred to as initial flushing) that circulates the hydraulic pressure oil from the hydraulic pump to fill the hydraulic circuit after the completion of the installation of the hydraulic device.
- initial flushing the air staying in the hydraulic circuit is returned to the oil tank as return oil mixed as bubbles.
- return oil containing bubbles is returned to the oil tank and mixed with the stored oil stored in the oil tank, the stored oil is sucked by the hydraulic pump and supplied to the hydraulic equipment as the operating pressure oil.
- the oil tank dedicated for flushing is used to circulate until the air in the hydraulic circuit runs out, discard the hydraulic oil mixed with bubbles, and switch to a tank that stores new hydraulic oil.
- the hydraulic circuit is long (pipe corresponding to the width of the river) like a hydraulic device for sluice operation, there is a problem that the cost of hydraulic oil increases.
- cleaning flushing for cleaning the hydraulic oil in the circuit. Also during the cleaning flushing, if the return oil bubbles at the time of the cleaning flushing are mixed with the oil stored in advance and sucked by the hydraulic pump and returned as the operating pressure oil, the operating equipment is adversely affected.
- Patent Document 1 which is a conventional technique that solves the above-described problems, includes a rectifying unit that rectifies a flow of return oil mixed with bubbles and flows it into an oil tank, and an oil level of oil stored in advance. Disclosed is a device that disposes bubbles in the return oil by disposing a foam extinguisher plate disposed at a gentle slope above, causing the return oil flowing into the oil tank to gently flow down along the top surface of the foam eraser plate. Yes.
- Patent Document 2 discloses an oil tank that removes bubbles mixed in oil that has returned to the oil tank through a hydraulic circuit by a cyclone type bubble removing device provided in the oil tank.
- the return oil defoaming device disclosed in Patent Document 1 has a structure in which a defoaming plate is provided in the lower stage of the rectifying means, and its function is not scattered even if the return oil is rectified by the rectifying means and collides with the defoaming plate. In this way, air is prevented from being entrained, and bubbles are separated into the air by flowing a return oil in which bubbles are gently and gently mixed on the upper surface of the foam extinguishing plate.
- the bubbles mixed in the high-viscosity oil become fine and difficult to separate in the process of passing through the complicated passage of the hydraulic circuit.
- the bubble erasing plate of the return oil bubble erasing device disclosed in Patent Document 1 is difficult to separate while the return oil flows widely and gently on the surface, and bubbles that cannot be separated are returned to the tank together with the return oil from the bubble erasure plate.
- This return oil that falls and mixes on the oil level of the stored oil tank is mixed into the deep part of the stored oil stored in the tank due to the inertia of the fall of hydraulic oil, so bubbles are mixed in the entire oil tank.
- a bubble removal device for return oil by a cyclone provided in an oil tank disclosed in Patent Document 2 has a configuration in which a spiral is generated in the cyclone by the returning hydraulic oil and the bubbles and the hydraulic oil are separated by the centrifugal force. It is. Since the hydraulic oil has a high viscosity, it causes a swirl within the cyclone, so that there is a problem that the circuit resistance is increased and the efficiency of the hydraulic device is lowered. Moreover, since the air bubbles removed by the cyclone are discharged into the hydraulic oil, there is a problem that the air bubbles are mixed into the oil tank.
- the present invention has been made in view of the above problems, and avoids mixing with the stored oil stored in the tank body by returning the return oil of the hydraulic circuit to the storage unit installed in the oil tank.
- the return oil of the hydraulic circuit stored in the part is diffused from the upper part of the storage part to the oil level of the stored oil stored in the tank body so that it does not penetrate into the deep part of the stored oil stored in the tank body.
- An object of the present invention is to provide an oil tank that reliably prevents oil mixed with bubbles in a hydraulic pump.
- An oil tank is provided at a position close to the bottom of a tank main body that contains oil, and is connected to a suction port connected to a hydraulic pump that supplies hydraulic oil to the hydraulic circuit, and a return line of the hydraulic circuit.
- a storage portion for storing the return oil is provided in the tank body, and the storage portion is a bottom portion thereof.
- a return oil inlet connected to the return pipe is opened at a position close to the storage pipe, and the storage oil stored in the storage section is allowed to flow over the storage section with return oil flowing in from the return oil inlet.
- the opening end that diffuses and mixes along the oil level of the stored oil stored in the tank body is provided below the lower oil level during operation of the stored oil stored in the tank body.
- the opening end of an accommodating part is located below the lower oil level at the time of the operation
- movement of the stored oil stored in the tank main body the stored oil stored in the above-mentioned tank main body is provided. Regardless of the vertical movement of the oil, it is performed below the oil level. That is, the opening end of the accommodating portion can diffuse the return oil along the oil level of the stored oil stored in the tank body, so that bubbles mixed in the return oil also drift along the oil level of the stored oil. It is.
- the suction port connected to the hydraulic pump is provided at a position close to the bottom of the tank, and the return oil drifting on the surface of the stored oil is not sucked, so that failure due to air bubbles in each device connected to the hydraulic circuit is prevented.
- the hydraulic pump can always be supplied with hydraulic oil free from air mixing, so the time from the initial flushing to the operation can be shortened, and the work loss due to various flushing of the hydraulic circuit is shortened.
- An oil tank includes a suction port connected to a hydraulic pump that is provided near the bottom of a tank body that contains oil and that supplies hydraulic oil to the hydraulic circuit, and a return pipe of the hydraulic circuit
- An oil tank having a return oil inflow port that is connected to a passage and discharges return oil from a hydraulic circuit to the tank main body, and includes a storage portion that stores the return oil in the tank main body.
- a return oil inlet connected to the return pipe is opened at a position close to the bottom, and an upper part of the stored oil stored in the tank body is operated by the return oil flowing in from the return oil inlet.
- An open end that overflows at a position beyond the oil level, and a stored oil that is stored in the storage portion that overflows from the open end below the lower oil level during operation of the stored oil stored in the tank body Is stored in the tank body Installation commutation wings so as to flow along the oil surface of the stored oil characterized by being configured to be disposed along said open end.
- the return oil which flows in into a storage part is stored in a storage part, and the stored oil which overflowed the opening end of the storage part with the return oil which flows in sequentially flows down along a storage part, and is flown by a rectifier blade. It can be made to drift along the oil surface at the time of the operation
- the oil level of the stored oil stored in the tank main body due to the use of the hydraulic circuit varies.
- the stored oil and return oil stored in the tank body are completely shut off.
- the stored oil in the storage section that has overflowed the open end flows down along the storage section and flows into the tank body by the rectifying blades that are provided below the oil level of the stored oil stored in the tank body. Float on the surface of the stored oil.
- the opening end of the accommodating portion is higher than the upper oil level during operation of the stored oil stored in the main body in the tank, and the lower oil surface during operation of the stored oil stored in the main body of the tank in the tank.
- the opening end of the storage portion above the upper oil level during operation of the stored oil stored in the tank body, the stored oil stored in the tank body and the return oil are completely blocked, Since the stored oil in the storage part can be diffused to the oil level of the stored oil stored in the tank body by the rectifying blades provided below the lower oil level during operation of the stored oil stored in the tank body, the opening It is possible to cope with the oil level fluctuation of the stored oil stored in the tank body that changes between the end and the rectifying blade. That is, when there is a volume difference between the rod side and the head side like a hydraulic cylinder, the oil level of the stored oil stored in the tank body rises and falls according to the volume difference. Since the return oil can be floated on the oil level of the stored oil when it is between the opening end of the housing portion and the position of the rectifying blade, it has an effect that can cope with a case where the oil level fluctuation of the stored oil is large.
- the oil tank of the third invention is the oil tank of the second invention, wherein a plurality of the rectifying blades are juxtaposed in the depth direction of the housing portion, and the width of the lower rectifying blade is set to the upper rectifying blade. It is characterized by a wider configuration than the wing.
- the rectification provided in the lower stage is provided.
- the return oil can float on the oil level. That is, by arranging a plurality of current plates in the depth direction of the housing portion, there is an effect corresponding to a large oil level fluctuation.
- the oil tank according to a fourth aspect of the present invention is the oil tank according to any one of the first to third aspects, wherein the return conduit is from an upper oil level during operation of the stored oil stored in the tank.
- a branch pipe provided with a discharge port that opens above and within the range of the opening end of the housing portion is provided.
- the air in the piping is pushed out by the supplied hydraulic oil, so the return oil contains a large amount of air bubbles, such a return containing a large amount of air.
- the return oil in the container is prevented from being scattered by the return oil containing a large amount of air bubbles, and is stored in the main body in the tank. This has the effect of preventing air bubbles from entering the deep part of the stored oil.
- the return oil that returns from the hydraulic circuit flows into the storage portion and is stored, and the return oil that overflows from the storage portion is stored on the oil level of the stored oil stored in the tank body. Drifting and drifting prevents the oil from returning to the bottom of the stored oil, so that air bubbles are mixed into the return oil from the hydraulic circuit during the initial operation of the hydraulic circuit, cleaning flushing, replacement flushing, and normal operation.
- the hydraulic pump does not inhale this bubble. For this reason, there is an effect that a safe operation can be performed in the normal operation, and further, the time between the normal operation after the flushing or the replacement of the hydraulic oil can be shortened.
- FIG. 9 is a diagram illustrating a bubble diffusion state as seen from AA ′ in FIG. 8.
- an oil tank 20 As shown in FIG. 1, an oil tank 20 according to this embodiment includes a tank body 26 that stores oil 25 in advance, and a suction port 31 that is provided near the bottom of the tank body 26 and that is connected to a suction side of a hydraulic pump 34.
- the oil 25 sucked by the hydraulic pump 34 from the suction port 31 is pressurized and supplied to the hydraulic equipment of the hydraulic circuit 1 as the operating pressure oil 22, and the return oil 24 of the hydraulic equipment returns via the return pipe 35.
- the oil 25 is composed of the inlet 16, the side surface 11a, and the bottom surface 11b, and is stored in the tank body 26 (hereinafter sometimes referred to as stored oil 25 or stored oil 25 stored in the tank body 26).
- the casing 18 is provided with an opening end 15 that protrudes from the oil surface H ⁇ b> 2 and is opened from the oil surface H ⁇ b> 2, and is separated from the stored oil 25 accommodated in the tank body 26 and flows into the return oil inlet 16.
- Return The accommodating part 10 that accommodates the oil 24 as the accommodated stored oil 23, and the collar part 12 that guides the accumulated oil 23 accommodated in the accommodating part 10 that overflows from the opening end 15 of the accommodating part 10 to the oil level of the accumulated oil 25. This is a configuration provided.
- the oil level H2 of the stored oil 25 stored in the main body 26 in the tank is accommodated in the tank main body 26 when the device of the hydraulic circuit 1 is operated by hydraulic pressure, and operating pressure oil flows from one to the other like a motor. Since the stored stored oil 25 only circulates in the hydraulic circuit 1, the oil level H2 does not fluctuate. However, since the reciprocating device such as the hydraulic cylinder 50 is larger than the volume when the rod is extended, the stored oil stored in the tank body 26 when the hydraulic cylinder 50 is extended most.
- the oil level H2 of 25 is the lowest value, and the oil level H2 at this time is described as the lower oil level H2 during operation, and the stored oil 25 stored in the tank body 26 when the hydraulic cylinder 50 is most contracted.
- the oil level H2 becomes the highest value, and the oil level H2 at this time is described as the upper oil level H2 during operation. In addition, when it is not necessary to distinguish the oil level of the stored oil 25, it describes as the oil level H2 at the time of driving
- the collar portion 12 in the oil tank 20 has a structure that gently slopes from the opening end 15 of the accommodating portion 10 toward the oil surface of the stored oil 25 accommodated in the tank main body 26.
- a wire mesh 13 is provided on the surface of the collar portion 12 in the oil tank 20 according to the first embodiment.
- the stored oil 25 accommodated in the tank body 26 in the first embodiment is hydraulic oil supplied to a hydraulic device such as a hydraulic cylinder that drives a working machine of an industrial machine, for example.
- the stored oil 25 need not be limited to hydraulic oil, and may be of other types.
- the tank main body 26 that is the main component of the oil tank 20 is configured in a box shape, and stores the stored oil 25 that is hydraulic oil that drives the cylinder 50.
- the shape of the tank body 26 is not necessarily limited to a box shape, and may be a cylindrical shape, for example.
- the suction port 31 is located in the vicinity of the bottom portion 26 a of the tank body 26, and is provided at the distal end portion of the suction pipe 38 connected to the hydraulic pump 34.
- the stored oil 25 is sucked from the suction pipe 38 to the hydraulic pump 34 and supplied as the operating pressure oil 22 for operating the hydraulic cylinder 50 by the direction switching valve 37 via the pressure oil supply pipe 36 of the hydraulic circuit 1.
- the vicinity of the bottom 26 a of the tank body 26 is a position below the oil level of the stored oil 25 accommodated in the tank body 26, and a position where the bubbles 40 staying near the oil level are not sucked from the suction port 31.
- the stored oil 25 that has settled on the bottom of the tank body 26 is also difficult to suck.
- the suction port 31 includes a filter (not shown) to prevent dust and dust from the stored oil 25 from entering the hydraulic circuit 1.
- the return oil inlet 16 is provided at the front end of the return pipe 35 as shown by a circle S1 in FIG. From the return oil inlet 16, it becomes the return oil 24 from the hydraulic cylinder 50 of the hydraulic circuit 1, passes through the return pipe 35, flows into the accommodating portion 10, and is stored as the stored oil 23.
- the return oil inlet 16 is provided near the bottom 11b of the storage portion 10 so as to separate and store the stored oil 25 stored in the tank body 26 and the return oil 24 flowing in from the return oil inlet 16.
- the return oil 24 that flows in through the return return pipe 35 through the return oil inlet 16 is stored as the stored oil 23 in the storage unit 10.
- the storage oil 23 and the storage oil 25 accommodated in the tank body 26 are mixed only on the oil surface of the storage oil 25.
- the return oil 24 flows in from the return oil inlet 16 that opens near the bottom portion 11 b of the storage unit 10 and is stored as the stored oil 23 in the storage unit 10, and the stored oil 23 overflows from the opening end 15. Then, the stored oil 25 is mixed.
- the housing portion 10 is mainly composed of a housing 18 that includes a bottom portion 11 b and a plurality of side surfaces 11 a and has an open end 15 on the top surface. Further, a collar portion 12 is provided at the opening end 15 of the accommodating portion 10. The collar portion 12 is gently inclined downward from the opening end 15 of the accommodating portion 10.
- the shape of the accommodating part 10 does not need to be limited to a rectangular parallelepiped, For example, a cylindrical shape may be sufficient and the collar part 12 may be provided along the opening end 15 thereof.
- the place where the collar part 12 is provided does not need to be limited to the opening end 15 of the accommodating part 10, and may be provided on the side surface 11a of the accommodating part 10, for example. As long as the collar portion 12 is located above the oil level of the stored oil 25 stored in advance in the tank body 26 or at a position near the oil surface and surrounds the open end 15, any position on the side surface 11 a of the storage unit 10 is provided. May be provided.
- the housing part 10 is fixed by two support parts 19 that connect the bottom part 11b and the bottom part 26a of the tank body 26. And when the accommodating part 10 is attached, the return pipeline 35 is inserted to the vicinity of the bottom part 11b in the accommodating part 10, and the return oil inflow port 16 opens at the front-end
- the cross-sectional area of the accommodating portion 10 is made sufficiently larger than the cross-sectional area of the return conduit 35 so that the return oil 24 flowing from the return oil inlet 16 via the return conduit 35 does not scatter in the accommodating portion 10. It is.
- the cross-sectional area of the bottom portion 11b portion of the accommodating portion 10 is a flow rate that rises while flowing into the accommodating portion 10 from the inflow port 16 and fills as the reserved oil 23, and the stored oil 23 that overflows the opening end 15 of the accommodating portion 10.
- the flow velocity at which the collar portion 12 flows down is such that the bubbles 40 can easily escape to the external air layer on the collar portion 12 so as to return to the oil level of the stored oil 25 that is contained in the tank body 26 gently. It is set to.
- the accommodating portion 10 is attached so as to protrude from the oil level of the stored oil 25 stored in the tank main body 26, and the collar portion 12 provided at the open end 15 of the stored oil 25 stored in the tank main body 26. It is located above the oil level H2. Thereby, the collar part 12 inclines gently toward the oil level of the stored oil 25 accommodated in the tank main body 26 from the upper end part of the accommodating part 10. As shown in FIG. Further, a wire mesh 13 is provided on the surface of the collar portion 12.
- the flow rate of the stored oil 23 flowing down the collar portion 12 is a flow rate at which the bubbles 40 can easily escape to the external air layer, and the oil level of the stored oil 25 in which the return oil 24 is gently accommodated in the tank body 26.
- the flow rate is enough to return to
- the stored oil 23 that slowly flows down the collar part 12 diffuses on the collar part 12 and becomes thin. Therefore, the distance that the bubbles 40 mixed in the stored oil 23 can escape to the external air layer is shortened, and the bubbles 40 are detached from the stored oil 23 while flowing down on the collar portion 12. Further, the flow rate of the stored oil 23 is slowed by the wire mesh 13 provided on the collar portion 12, and the bubbles 40 are easily diffused into the air.
- the return oil inlet 16 to which the return pipe 35 is connected has an elliptical shape obtained by obliquely cutting the pipe in order to obtain a larger cross-sectional area than the return pipe 35, and in the vicinity of the return oil inlet 16.
- the plurality of holes 14 have a role of releasing the return oil 24 when the return oil 24 flowing in from the return pipe 35 increases rapidly so that the return pipe 35 is not raised by the return oil 24. ing.
- an air breather 32 is provided on the top plate of the tank body 26.
- the air breather 32 filters the air that enters and leaves when the oil level of the stored oil 25 accommodated in the tank body 26 fluctuates due to its operation through a filter provided inside, and generates dust. And prevents moisture from entering.
- the oil tank 20 having the above-described configuration stores the oil 25 that supplies the operating pressure oil 22 to the hydraulic circuit 1 including the hydraulic pump 34, the direction switching valve 37, the multifunction valve 60, the hydraulic cylinder 50, and the like. is doing.
- the hydraulic circuit 1 according to the first embodiment is a hydraulic circuit of the hydraulic cylinder 50, but is not limited to this and may be used for other purposes.
- the hydraulic pump 34 rotates when the two gears mesh with each other, and supplies the stored oil 25 stored in the tank body 26 from the suction port 31 to the hydraulic circuit 1 including the hydraulic cylinder 50 as the working hydraulic oil 22.
- the hydraulic pump 34 is not limited to a gear pump, and other types of hydraulic pumps may be used.
- a hydraulic cylinder 50 A hydraulic cylinder 50, a cylinder tube 52, a rod 51 that moves forward and backward in the cylinder tube 52, and a piston that is slidably fitted in the cylinder tube 52 and fixed to the rod 51.
- the hydraulic cylinder 50 operates in the A direction in which the piston slides on the cylinder tube 52 and the rod 51 extends or the B direction in which the rod 51 contracts due to the supply and discharge of the hydraulic pressure oil from the hydraulic pump 34.
- the oil chamber (head side pressure chamber) for operating the rod 51 in the extending direction has a larger volume than the oil chamber (rod side pressure chamber) for operating the rod 51 in the contracting direction. For this reason, the oil level H ⁇ b> 2 of the stored oil 25 accommodated in the tank body 26 fluctuates up and down by the operation of the hydraulic cylinder 50.
- the direction switching valve 37 is provided between the hydraulic pump 34 and the hydraulic cylinder 50, has three switching positions, and changes the flow direction of the operating pressure oil by switching to these switching positions. Yes, it is possible to switch to the left switching position 37a, the neutral position 37b, and the right switching position 37c.
- the direction switching valve 37 is switched to the left switching position 37a, the rod 51 of the hydraulic cylinder 50 supplies the operating pressure oil 22 from the hydraulic pump 34 in the direction extending in the A direction, and the discharge side of the hydraulic cylinder 50 is connected to the return line 35. Connecting.
- the direction switching valve 37 when the direction switching valve 37 is switched to the right switching position 37c, the hydraulic pressure oil 22 is supplied from the hydraulic pump 34 in the direction B in which the rod 51 is contracted, and the discharge side of the hydraulic cylinder 50 is connected to the return line 35. Further, when the direction switching valve 37 is switched to the neutral position 37 b, the pressure oil supply / discharge pipe 36 and the return pipe 35 are disconnected from the hydraulic cylinder 50 so that the rod 51 of the hydraulic cylinder 50 does not expand and contract.
- the multi-function valve 60 in the first embodiment is directly attached to the hydraulic cylinder 50 and includes three stop valves 61, 62, 63.
- the stop valve 62 of the multi-function valve 60 opens and closes between the pressure oil supply / discharge pipe 36a and the hydraulic cylinder 50, and the stop valve 63 opens and closes the passage between the pressure oil supply / discharge pipe 36b and the hydraulic cylinder 50. Further, the stop valve 61 opens and closes between the pressure oil supply / discharge pipe 36b.
- the initial flushing that fills the hydraulic circuit 1 with hydraulic oil after the piping work is completed will be described.
- oil is supplied to the tank body 26 from a supply port (not shown) by an operator and stored as stored oil 25.
- the stored oil 25 does not enter the hydraulic circuit 1 and the accommodating portion 10.
- the oil level H1 is the oil level stored in the tank body 26 when the tank body 26 is filled with the stored oil 25 and the initial flushing is not performed.
- the oil 25 is sucked into the hydraulic pump 34 from the suction port 31 by the drive of the hydraulic pump 34, and is supplied to the hydraulic circuit 1 as the operating pressure oil 22.
- the stop valves 62 and 63 in the multi-function valve 60 are closed, the stop valve 61 is opened, and the direction switching valve 37 is switched to the left switching position 37a.
- the operating pressure oil 22 from the hydraulic pump 34 is not supplied to the hydraulic cylinder 50, but returns from the pressure oil supply / discharge pipe 36a via the stop valve 61 and from the pressure oil supply / discharge pipe 36b via the direction switching valve 37. It returns to the accommodating part 10 from the pipe 35.
- the working pressure oil 22 flowing out from the suction port 31 and pressurized by the hydraulic pump 34 is supplied from the pressure oil supply / discharge pipe 36 through the direction switching valve 37 to the pressure oil supply / discharge pipe 36a, stop valve 61, pressure oil supply. It returns to the return oil 24 from the direction switching valve 37 via the return pipe 35 via the drain pipe 36b. For this reason, the working pressure oil 22 returns to the accommodating part 10 from the return oil inflow port 16 while pushing out the air staying in the pipe line and the direction switching valve 37. At this time, since the inside of the storage unit 10 is in an empty state, the air pushed out by the return oil 24 is discharged to the air layer in the storage unit 10.
- the stored oil 25 circulated in the hydraulic circuit 1 is returned to the return oil 24. Then, the oil flows into the storage portion 10 from the return oil inlet 16 and is stored as the stored oil 23.
- the stored oil 23 stored in the storage unit 10 fills the storage unit 10 and raises the oil level of the stored oil 23 to the upper end of the storage unit 10. Note that the stored oil 23 at this time is in a state in which air that has not escaped to the air layer is contained as bubbles 40.
- the stored oil 23 accommodated in the accommodating part 10 eventually flows over the opening end 15 of the accommodating part 10 and the wire mesh 13 of the collar part 12 is indicated by an arrow E1. And flows into the oil level of the stored oil 25 accommodated in the tank body 26.
- the stored oil 23 flowing down on the collar portion 12 becomes thin, some of the bubbles 40 mixed in the stored oil 23 are released to the external air layer. Further, when the bubbles 40 come into contact with the wire mesh 13 provided on the surface of the collar portion 12, the flow-down speed of the stored oil 23 is relaxed, and the bubbles 40 are easily separated into the atmosphere.
- the stored oil 23 including the bubbles 40 flows into the oil level of the stored oil 25 stored in the tank body 26 as shown by the arrow E1, so that the stored oil 23 is stored in the tank body 26.
- the stored oil 25 is mixed by receiving a force in the direction of diffusing to the oil surface. For this reason, since the stored oil 23 diffuses and stays on the oil level of the stored stored oil 25, the stored oil 25 that does not include the bubbles 40 is always sucked from the suction port provided near the bottom of the tank body 26. Will come to be.
- the directional control valve 37 is operated to the neutral position 37b in a state where the pipeline such as the pressure oil supply pipe 36 and the return pipeline 35 in the hydraulic circuit 1 is filled with oil. Confine.
- the stop valves 62 and 63 of the multi-function valve 60 are opened, and the stop valve 61 is closed.
- the direction switching valve 37 is alternately switched to the left switching position 37a or the right switching position 37c, and the rod 51 of the hydraulic cylinder 50 is moved forward and backward. Thereby, the oil 25 can be filled in the hydraulic cylinder 50.
- the air staying in the cylinder 50 becomes a bubble 40 and the return oil 24 passes through the return pipe 35 and is accommodated in the accommodating portion 10. Thereafter, the air bubbles 40 flow over the housing portion 10 and flow through the collar portion 12 to be returned to the oil level of the stored oil 25 previously stored in the tank main body 26. Thereby, all the air previously retained in the hydraulic circuit 1 can be removed. In this way, when the initial flushing of the hydraulic circuit 1 and its equipment is completed, the circuit and the hydraulic equipment are filled with oil, and accordingly, the stored oil 25 stored in the tank body 26 is reduced to the oil level H2.
- the hydraulic circuit 1 includes the multi-function valve 60 in which the stop valves 62 and 63 and the stop valve 61 are integrated into one, but the hydraulic circuit 1 is provided separately. May be.
- the multi-function valve 60 By using the multi-function valve 60, the piping existing between the stop valve 62, the stop valve 63, and the stop valve 61 can be minimized, so that the air that must be removed in the hydraulic circuit 1 is minimized. Can be suppressed.
- the air bubbles 40 remaining in the stored oil 23 in which the return oil 24 that has returned to the storage unit 10 is stored travels through the storage unit 10 and the collar 12 and the stored oil 25 stored in the tank body as indicated by the arrow E1. Since the stored oil 23 is not mixed in the deep part of the stored oil 25 accommodated in the tank body 26, oil that does not contain the bubbles 40 is always supplied from the suction port 31 to the hydraulic pump. 34 can be supplied. Further, the oil level of the stored oil 25 accommodated in the tank main body 26 at this time becomes the height of the oil level H ⁇ b> 2 reduced by an amount that satisfies the hydraulic circuit 1 and the hydraulic cylinder 50. The oil level H2 moves up and down by the volume difference when the hydraulic cylinder 50 is operated. The air in the tank body 26 that increases or decreases as the oil level H2 rises or falls enters and exits through the air breather 32.
- the oil tank 120 may be provided with a sieve 80 received by the oil level of the stored oil 25 stored in the stored oil 23 tank body 26 of the storage unit 10 guided by the collar portion 12.
- the sieve 80 is formed in a mesh state, and the mesh portion stores the stored oil 23 that has been stored in advance by receiving the stored oil 23 of the storage unit 10 that has flowed down the collar portion 12 and absorbing the impact of the fall. 25.
- the stored oil 23 is prevented from being trapped in the deep part, and the stored oil 23 is diffused on the surface.
- the momentum of the stored oil 23 is applied to the oil level of the stored oil 25 stored in the tank body 26 by the sieve 80. Since the stored oil 23 in the container 10a is diffused along the oil surface of the stored oil 25 as shown in FIG. 9, the bubbles 40 are formed in the deep part of the stored oil 25. The air bubbles 40 are prevented from being mixed, and the air bubbles 40 do not dive deeply in the stored oil that has been stored in advance vigorously. Therefore, the air bubbles 40 can be more reliably retained near the oil surface.
- the oil tank 130 according to the third embodiment shown in FIG. 5B has a float part 90 that receives the stored oil 23 guided by the collar part 12 near the oil level of the stored oil 25 accommodated in the tank body 26.
- the float portion 90 floats on the oil level of the stored oil 25 stored in the tank body 26 in advance, and the oil level of the stored oil 25 stored in the tank body 26 rises or falls. It moves up and down with this. Therefore, the stored oil 23 that has flowed down the collar portion 12 slowly flows down on the float portion 90 that floats on the oil surface of the stored oil 25 before returning to the oil surface of the stored oil 25 accommodated in the tank body 26.
- the oil is returned to the oil level of the stored oil 25 accommodated in the tank body 26.
- the force is converted by the float unit 90 toward the oil level of the stored oil 25, and the stored oil 23 is transferred to the tank body 26. It is made to diffuse and float on the oil surface of the stored stored oil 25.
- the bubble 40 is not mixed in the stored oil 25 by the impact caused by the contact with the oil surface. In this manner, since the bubbles 40 do not sink deeply in the deep portion of the stored oil 25 accommodated in the tank body 26, the bubbles 40 can be more reliably retained near the oil surface.
- the return pipe 35 is divided into two pipes before the return pipe 35 enters the tank body 26 as shown in FIGS. May be.
- the return pipe 35 is connected to the accommodating portions 10 a and 10 b via the return oil inlet 16, and the branch return pipe 35 a branched from the return pipe 35 passes through the stop valve 33.
- the air layer in the tank body 26 is configured to open above the sieve 80 or the float 90.
- the stop valve 33 opens and closes the branch return pipe 35a by manually turning a handle (not shown).
- the injected air collides with the mesh 80 or the float 90, and this air is accommodated in the tank body 26.
- the stored oil 25 is diffused in the direction of the oil level.
- the pipes to the storage portions 10a and 10b are high in pressure.
- the air pushed out by the oil 24 can flow to the branch return pipe 35 a and be discharged to the air layer of the tank body 26.
- the stop valve 33 is closed, and the return oil 24 containing the bubbles 40 is then flowed to the accommodating portions 10a and 10b.
- the return oil 24 can be caused to flow from the return oil inlet 16 into the accommodating portions 10a and 10b.
- the oil tank 120 receives the stored oil 23 stored in the storage unit 10 a guided by the collar portion 12 near the oil level of the stored oil 25 stored in the tank body 26.
- a sieve 80 is provided.
- the momentum can be absorbed by the sieve 80.
- the bubbles 40 are not further mixed due to the impact caused by the contact with the oil level of the stored oil 25 stored in the tank body 26, and the bubbles 40 do not dive deeply in the oil.
- the oil tank 130 has a float unit 90 that receives the stored oil 23 stored in the storage unit 10 b guided by the collar unit 12 near the oil level of the stored oil 25 stored in the tank body 26. Is provided.
- the float part 90 can absorb the momentum. It can.
- the stored oil 23 stored in the storage portion 10b is not mixed deeply into the stored oil 25 stored in the tank main body 26, and more reliably near the oil level of the stored oil 25 stored in the tank main body 26. Can stay.
- the hydraulic circuit according to the second and third embodiments is divided into two pipes before the return pipe 35 communicates with the oil tanks 120 and 130, and one pipe is connected to the return pipe 35.
- the return oil inflow port 16 to be connected communicates with the inside of the accommodating portion 30, and the other pipe line communicates with the air layer in the tank body 26 via the stop valve 33.
- the air in the hydraulic circuit can be released to the air layer of the tank main body 26, and the plurality of hydraulic cylinders 50.
- a hydraulic circuit having a plurality of pipes associated therewith even if there is a large amount of air in the hydraulic circuit, it is surely released into the air layer and is not mixed into the stored oil 25 accommodated in the tank body 26.
- the oil tank 420 according to the fourth embodiment includes a side plate 421 and a bottom plate of a member 417 in which an accommodating portion 17a provided therein is bent into a “U” shape of katakana as shown in FIG. It is comprised by the box body which was fixed to 422 by the tap welding and the upper part was open
- the return pipe 35 of the hydraulic circuit 1 is inserted to near the bottom of the accommodating portion 17a, and the tip thereof is cut obliquely so that the return oil inlet 16 having a cross-sectional area larger than the cross-sectional area of the return pipe 35, and its A plurality of holes 14 are provided nearby, and the holes 14 prevent the generation of pressure in the housing portion 17a when a large amount of return oil 24 returns to the return pipe 35.
- the branch return pipe 35a from the return pipe 35 has an oil level H3 (oil level of the stored oil 25 in which the hydraulic circuit 1 in which the oil is stored in the tank body 26 is not filled with oil) via the stop valve 33. It has the opening part 35b opened to the position corresponding to the inside of the accommodating part 17a above.
- the tap welding between the member 417 and the side plate 421 has a gap into which the stored oil 25 enters when the oil is stored in the oil tank 420.
- the oil tank 420 according to the fourth embodiment is the same as that of the first embodiment except for the configuration of the accommodating portion 17a provided in the inside thereof. Omit.
- the opening end 150 provided in the upper portion of the accommodating portion 17a has a lower oil level H2 during operation in which the initial flushing of the hydraulic circuit 1 has been completed and pressure oil has been supplied to the hydraulic circuit 1 and the hydraulic cylinder 50 that is the hydraulic device. It is the structure opened below the (oil surface where the stored oil 25 accommodated in the oil tank 420 is consumed to the maximum) at a position where a flow path R4 is formed with the oil surface H2.
- the hydraulic oil is supplied from the hydraulic pump 34 to the hydraulic circuit 1, and the return oil 24 is supplied from the return pipe 35 through the return oil inlet 16 provided near the bottom of the accommodating portion 17 a. Inflow.
- the return oil 24 is isolated from the stored oil 25 stored in the tank body 26 by the storage portion 17a. Therefore, even if the return oil 24 contains bubbles 40, it does not enter the deep portion of the stored oil 25 accommodated in the tank body 26.
- the return oil 24 returns to the bottom of the housing portion 17a from the oil inlet 16 and is stored therein as the stored oil 23, and is pushed upward to flow over the open end 150 and between the open end 150 and the oil surface H2.
- the branch return pipe 35a opens the stop valve 33 when a large amount of air is expected to flow in from the return pipe 35 in initial flushing or the like, and discharges the inflow air into the space of the tank body 26. It is supposed to be.
- the air flowing in from the branch return pipe 35a rushes into the deep part from the oil surface H2 with the momentum, but the position of the branch return pipe 35a is inside the casing constituting the oil tank 420. As shown in K4, it enters the inside of the accommodating portion 17a. For this reason, mixing with the stored oil 25 accommodated in the tank body 26 is prevented and the suction port 31 is not sucked.
- the oil tank 420 according to the fifth embodiment is the same as that of the fourth embodiment except for the configuration of the accommodating portion 17b provided in the inside thereof. Omit.
- the opening end 150a provided in the upper part of the accommodating portion 17b provided in the oil tank 420 is located at or slightly above the oil level H3 before the initial flushing of the hydraulic circuit 1 is completed. Further, as shown in FIG. 9, the rectifying blade 424 fixed to the member 417 of the accommodating portion 17b along the opening end 150a is supplied with maximum pressure oil to the hydraulic circuit 1 and the hydraulic cylinder 50 which is the hydraulic equipment. It is fixed at a position where a flow path R5 is formed between the lower oil level H2 during operation and the oil level H2 below the oil level where the stored oil 25 stored in the oil tank 420 is consumed to the maximum extent.
- the hydraulic oil is supplied from the hydraulic pump 34 to the hydraulic circuit 1, and the return oil 24 is provided from the return pipe 35 through the return oil inlet 16 provided near the bottom of the housing portion 17b. Inflow.
- the return oil 24 is isolated from the stored oil 25 stored in the tank body 26 by the storage portion 17b. Therefore, even if the return oil 24 contains bubbles 40, it does not enter the deep portion of the stored oil 25 accommodated in the tank body 26.
- the return oil 24 from the return pipe 35 flows in from the return oil inlet 16 at the bottom of the accommodating portion 17b, is stored therein as the stored oil 23, is sequentially pushed upward, and flows over the opening end 150a along the member 417.
- the oil flows down and diffuses along the oil surface of the stored oil 25 accommodated in the tank body 26 as shown by the arrow Y5 through the flow path R5 between the rectifying blade 424 and the oil surface H2.
- This diffusion state diffuses in all directions on the surface of the oil surface H2, as indicated by the arrow Y5 and the arrow Y7 in FIG.
- the branch return pipe 35a branched from the return pipe 35 has the same structure and function as the fourth embodiment, so that the same reference numerals are given and the explanation thereof is omitted.
- the rectifying blade 425 provided at the lower stage of the rectifying blade 424 of the housing portion 17c is substantially parallel to the rectifying blade 424, and the return oil 24 returning to the housing portion 17c is stored in the housing portion 17c and becomes the stored oil 23. Therefore, the stored oil 23 flowing down along the member 417 from the opening end 150 a has a width wider than that of the rectifying blade 424 so that the stored oil 23 flows along the stored oil 25 accommodated in the tank body 26.
- the opening end 150a of the storage portion 17c is set.
- the overflowing stored oil 23 is diffused by the rectifying blades 424 at the upper part of the oil level of the stored oil 25 accommodated in the tank body 26 as indicated by arrows Y5 and Y7.
- the oil level H2 is lowered to a level between the rectifying blade 424 and the rectifying blade 425 due to forgetting to supply the tank body 26 with oil. State.
- the oil level H2 drops to between the rectifying blades 424 and 425, the stored oil 23 that has overflowed the opening end 150a of the accommodating portion 17c overflows the opening end 150a of the accommodating portion 17c and the width w1 of the rectifying blade 424.
- the stored oil 23 falls on the width W ⁇ b> 2 of the rectifying blade 425, the stored oil 23 is guided along the oil surface H ⁇ b> 2 of the stored oil 25 accommodated in the tank body 26. For this reason, even if the stored oil 25 stored in the tank body 26 is greatly reduced, even if bubbles are mixed in the return oil 24 stored in the storage portion 17c, the stored oil 25 stored in the tank body 26 Do not mix deep.
- the housing part of the above embodiment is configured in a casing.
- the shape of the member 417 as shown in FIG. 9 is shown by tap welding.
- this shape may be circular, and an iron plate is welded to the corners of the hydraulic tanks 20 and 420 to form an enclosure.
- the cross section may be a triangle or a square.
- the present invention can be used for oil tanks in industrial hydraulic circuits or construction machinery hydraulic circuits.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
以下、本発明の第1実施形態について、図1~図4(b)を参照しつつ説明する。
図1に示すように、本実施形態に係る油タンク20は、油25を予め貯留するタンク本体26と、タンク本体26の底部の近傍に設けられ油圧ポンプ34の吸い込み側が接続する吸込口31と、吸込口31から油圧ポンプ34により吸引された油25を加圧して作動圧油22として油圧回路1の油圧機器に供給され油圧機器の戻り油24が戻り管路35を介して帰還する戻り油流入口16と、側面11aと底部面11bとから構成され、タンク本体26に収容された油25(以下貯留油25あるはタンク本体26に収容された貯留油25と記載する場合もある。)の運転時の油面H2から突出して上面が開口されたる開口端15を備えた筐体18を有し、タンク本体26に収容された貯留油25から分離して戻り油流入口16から流入した戻り油24を収容貯留油23として収容する収容部10と、収容部10の開口端15から越流する収容部10に収容した貯留油23を貯留油25の油面に導くつば部12と、を備えた構成である。
収容部10は、図2に示すように、底部11bと複数の側面11aとからなり、上面に開口端15を有する筐体18を主体としている。また、収容部10の開口端15には、つば部12が設けられている。つば部12は、収容部10の開口端15から下方に向けて緩傾斜されている。なお、収容部10の形状は、直方体に限定される必要はなく、例えば円筒状であってもよく、その開口端15に沿ってつば部12が設けられていてもよい。また、つば部12が設けられている場所は、収容部10の開口端15に限定される必要はなく、例えば、収容部10の側面11aに設けられていてもよい。つば部12は、タンク本体26に予め収容されている貯留油25の油面よりも上方または油面のちかくの位置し開口端15を囲む位置であれば、収容部10の側面11aにおける如何なる位置に設けられていてもよい。
油圧ポンプ34は、2つの歯車が噛み合うことによって回転して、タンク本体26に収容された貯留油25を吸込口31から吸出し作動圧油22として油圧シリンダ50を備えた油圧回路1へ供給する。なお、油圧ポンプ34は、歯車式ポンプに限らず、他形式の油圧ポンプを用いていてもよい。
油圧シリンダ50、シリンダチューブ52と、シリンダチューブ52内を進退するロッド51と、シリンダチューブ52内に摺動自在に嵌入してありロッド51に固定されたピストンと、を備えている。油圧シリンダ50は、油圧ポンプ34からの作動圧油の供排により前記のピストンがシリンダチューブ52を摺動しロッド51が伸張するA方向またはロッド51が縮小するB方向に作動する。なお、ロッド51の伸張方向に作動させるための油室(ヘッド側圧力室)は、ロッド51を縮小方向に作動させるための油室(ロッド側圧力室)より大きい容積である。このため、油圧シリンダ50の作動によりタンク本体26に収容された貯留油25の油面H2は上下に変動する。
方向切換弁37は、油圧ポンプ34と油圧シリンダ50との間に設けられており、3つの切換位置を有し、これらの切換位置に切り換え操作することによって作動圧油の流れ方向を変える構成であり、左切換位置37aと中立位置37bと右切換位置37cとに切り換えることができる。この方向切換弁37を左切換位置37aに切り換えると油圧シリンダ50のロッド51はA方向に伸びる方向に油圧ポンプ34からの作動圧油22を供給し油圧シリンダ50の排出側を戻り管路35に接続する。また、方向切換弁37を右切換位置37cに切り換えるとロッド51が縮小するB方向に油圧ポンプ34からの作動圧油22を供給し油圧シリンダ50の排出側を戻り管路35に接続する。さらに、方向切換弁37を中立位置37bに切り換えた場合、油圧シリンダ50のロッド51の伸縮しないように圧油給排管36及び戻り管路35と油圧シリンダ50とを遮断する。
第1実施形態における多機能弁60は、油圧シリンダ50に直接取り付けてあり、3つの止弁61、62、63を備えている。この多機能弁60の止弁62は、圧油給排管36aと油圧シリンダ50との間を開閉し、止弁63は圧油給排管36bと油圧シリンダ50との通路を開閉する。さらに止弁61が圧油給排管36bの間を開閉する。このような構成を有する多機能弁60を利用して、止弁62・63および止弁61を開閉することによって、油圧シリンダ50や圧油給排管36a、圧油給排管36bの破損箇所の検知が出来るようになっている。また、止弁61を開いて油圧シリンダ50をバイパスして圧油給排管36aと圧油給排管36bを接続してタンク本体26に収容された貯留油25を油圧回路1内で循環させて、各種(初期、清掃、交換)のフラッシングを行うことが出来るようなっている。
次に、図3と図4を用いて、第1実施形態の作動について述べる。
次に図5(a)に示す第2実施形態について説明する。油タンク120は、つば部12によって導かれた収容部10の貯留油23タンク本体26に収容された貯留油25の油面で受けるふるい80が設けられていてもよい。ふるい80は、メッシュ状態に形成されており、そのメッシュ部分は、つば部12を流下してきた収容部10の貯留油23を一旦受けて落下の衝撃を吸収することで予め貯留していた貯留油25深部に貯留油23がもぐりこむのを防止しその表面に、貯留油23を拡散させる。
また、図5(b)に示す第3実施形態に係る油タンク130は、つば部12によって導かれた貯留油23をタンク本体26に収容された貯留油25の油面近くで受けるフロート部90を設けた構成であり、フロート部90は、タンク本体26に予め貯留していた貯留油25の油面に浮かんでおり、タンク本体26に収容された貯留油25の油面が上昇または下降するのに伴って上下移動するようになっている。そのため、つば部12を流下した貯留油23は、タンク本体26に収容された貯留油25の油面に戻る前に、貯留油25の油面に浮かんだフロート部90上をゆっくりと流下し、タンク本体26に収容された貯留油25の油面上へ戻されるようになっている。このように、気泡40を含んだ戻り油24が油面に勢い良く戻った場合でも、フロート部90によってその勢いを貯留油25の油面の方向に変換し、貯留油23をタンク本体26に収容された貯留油25の油面に拡散させて漂わせる。これにより、油面との接触による衝撃で気泡40が貯留油25に混入しない。この様に、勢いでタンク本体26に収容された貯留油25の深部に気泡40が潜ってしまうことがないため、より確実に気泡40を油面近くに滞留させることができる。
以上のように、第2実施形態に係る油タンク120は、つば部12によって導かれた収容部10aに収容された貯留油23をタンク本体26に収容された貯留油25の油面近くで受けるふるい80が設けられている。
図6(a)と図6(b)に基づいて第4実施形態について述べる。第4実施形態に係る油タンク420は、その内部に設けられた収容部17aが、図9に示すようにカタカナの"コ"の字型に折り曲げた部材417を油タンク420の側板421と底板422にタップ溶接で固定してその上部が開放された箱体で構成してある。油圧回路1の戻り管路35は、収容部17aの底部近まで挿入し、その先端を斜めに切断することで前記戻り管路35の断面積より大きい断面積の戻り油流入口16と、その近くに複数の孔14を設けた構成であり、この孔14が戻り管路35に大量の戻り油24が帰還した時の収容部17a内の圧力の発生を防止する。また、前記戻り管路35からの分岐戻り管路35aは、止弁33を介して油面H3(タンク本体26に油が収容された油圧回路1が油で充満されない貯留油25の油面)より上で且つ収容部17aの内部に対応する位置に開口する開口部35bを有する。なお、部材417と側板421のタップ溶接は、油タンク420に油が貯留された時その貯留油25が浸入する隙間を有する。第4実施形態に係る油タンク420は、その内部に設けられた収容部17aの構成が相違するのみで、その他は前記第1実施形態と同様であるので、同一符号を付してその説明を省く。
次に図7(a)及び図7(b)に基づいて第5実施形態について述べる。第5実施形態に係る油タンク420は、その内部に設けられた収容部17bの構成が相違するのみで、その他は前記第4実施形態と同様であるので、同一符号を付してその説明を省く。
次に図8に基づいて第6実施形態について述べる。第6実施形態と第5実施形態との相違点は、第5実施形態の整流翼424の下段に整流翼425を設けた点であるので、その部分について説明しその他は同一符号を付けてその説明を省く。
10 収容部
11a 側面
11b 底部
12 つば部
13 金網
14 孔
15 開口部
16 戻り油流入口
17a 収容部
17b 収容部
17c 収容部17c
20 油タンク
22 作動圧油
23 貯留油
24 戻り油
25 タンク本体26に収容された貯留油
26 タンク本体
26a 底部
31 吸込口
32 エアブリーザ
34 油圧ポンプ
35 戻り管路
36 圧油供給管
36a 圧油給排管
36b 圧油給排管
37 方向切換弁
37a 左切換位置
37b 中立位置
37c 右切換位置
38 吸入管
40 気泡
50 油圧シリンダ
51 ロッド
52 シリンダケース
60 多機能弁
61 止弁
62 止弁
63 止弁
424 整流翼
425 整流翼
H1 油面
H2 油面
Claims (4)
- 油を収容するタンク本体の底部に近接する位置に設けられ油圧回路に作動圧油を供給する油圧ポンプが接続する吸込口と、前記油圧回路の戻り管路に接続し油圧回路からの戻り油を前記タンク本体に流入させる戻り油流入口とを備えた油タンクにおいて、
前記タンク本体内に前記戻り油を収容する収容部を設け、この収容部は、その底部に近接する位置に前記戻り管路に接続する戻り油流入口が開口させられると共に、前記収容部に収容した貯留油を前記戻り油流入口より流入する戻り油で前記収容部を越流させ前記タンク本体内に貯められた貯留油の油面に沿って拡散して混合させる開口端を前記タンク本体に収容された貯留油の運転時の下方の油面より下に設けた構成としたことを特徴とする油タンク。 - 油を収容するタンク本体の底部に近接する位置に設けられ油圧回路に作動圧油を供給する油圧ポンプが接続する吸込口と、前記油圧回路の戻り管路に接続し油圧回路からの戻り油を前記タンク本体に排出する戻り油流入口とを備えた油タンクにおいて、
前記タンク本体内に前記戻り油を収容する収容部を設け、この収容部は、その底部に近接する位置に前記戻り管路に接続する戻り油流入口が開口させられると共に、前記戻り油流入口より流入する戻り油で前記タンク本体に収容された貯留油の運転時の上方の油面を越えた位置で越流させる開口端と、前記タンク本体に収容された貯留油の運転時の下方の油面より下で前記の開口端から越流する前記収容部に収容した貯留油の流れを前記タンク本体に収容された貯留油の油面に沿った流れにする様に設置された整流翼を前記開口端に沿って配置する構成としたことを特徴とする油タンク。 - 前記収容部の深さ方向に前記整流翼を複数枚のを並設し、下段の整流翼の幅を上段の整流翼より広い構成としたことを特徴とする請求項2記載の油タンク。
- 前記戻り管路は前記タンク内に貯られた貯留油の運転時の上方の油面より上方で且つ前記収容部の開口端の範囲内に開口する排出口を備えた分岐管を備えたことを特徴とする請求項1~3のいずれか1の請求項に記載の油タンク。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020127020905A KR20120121896A (ko) | 2010-02-03 | 2011-02-01 | 오일 탱크 |
US13/576,948 US8739822B2 (en) | 2010-02-03 | 2011-02-01 | Oil tank |
EP11739745.5A EP2532899B1 (en) | 2010-02-03 | 2011-02-01 | Oil tank |
CN201180008348XA CN102762874A (zh) | 2010-02-03 | 2011-02-01 | 油箱 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010-021879 | 2010-02-03 | ||
JP2010021879 | 2010-02-03 | ||
JP2011-015034 | 2011-01-27 | ||
JP2011015034A JP5550576B2 (ja) | 2010-02-03 | 2011-01-27 | 油タンク |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011096397A1 true WO2011096397A1 (ja) | 2011-08-11 |
Family
ID=44355395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/052042 WO2011096397A1 (ja) | 2010-02-03 | 2011-02-01 | 油タンク |
Country Status (6)
Country | Link |
---|---|
US (1) | US8739822B2 (ja) |
EP (1) | EP2532899B1 (ja) |
JP (1) | JP5550576B2 (ja) |
KR (1) | KR20120121896A (ja) |
CN (1) | CN102762874A (ja) |
WO (1) | WO2011096397A1 (ja) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016036954A (ja) * | 2014-08-07 | 2016-03-22 | 株式会社ソディック | 射出成形機の作動油タンクまたは補助油タンク |
CN106018218A (zh) * | 2016-05-12 | 2016-10-12 | 李伟波 | 用液压滤波、电磁离心和相邻电容的磨损微粒监测方法 |
CN106018212A (zh) * | 2016-05-12 | 2016-10-12 | 李伟波 | 一种用滤波、离心和相邻电容的磨损微粒在线监测方法 |
CN106018220A (zh) * | 2016-05-12 | 2016-10-12 | 李伟波 | 用液压滤波、离心和相邻电容的磨损微粒在线监测方法 |
CN106018213A (zh) * | 2016-05-12 | 2016-10-12 | 李伟波 | 采用滤波、电磁离心分离和相邻电容的磨损微粒监测方法 |
CN110195816A (zh) * | 2019-06-21 | 2019-09-03 | 杭州汽轮动力集团有限公司 | 用于燃气轮机润滑油箱的除气盘 |
WO2021092101A1 (en) * | 2019-11-06 | 2021-05-14 | Caterpillar Inc. | Hydraulic tank |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3010133B1 (fr) * | 2013-09-02 | 2015-10-02 | Snecma | Reservoir comprenant une cloison inclinee munie a ses extremites d'orifices traversants pour une alimentation continue de turbomachine en liquide d'alimentation |
CN104214144A (zh) * | 2014-08-18 | 2014-12-17 | 福建省计量科学研究院 | 力标准机液压控制中的储油罐装置 |
US10578136B2 (en) | 2014-10-01 | 2020-03-03 | Volvo Construction Equipment Ab | Hydraulic fluid tank arrangement |
US20150158669A1 (en) * | 2015-02-18 | 2015-06-11 | Caterpillar Global Mining Llc | Hydraulic tank fill system |
DE102015211897A1 (de) * | 2015-06-26 | 2016-12-29 | Siemens Aktiengesellschaft | Öltank |
JP6404792B2 (ja) * | 2015-09-11 | 2018-10-17 | 東芝メモリ株式会社 | 薬液タンク |
JP6613101B2 (ja) * | 2015-10-26 | 2019-11-27 | ヤマシンフィルタ株式会社 | リターンフィルタ |
SE541197C2 (sv) * | 2015-11-13 | 2019-04-30 | Lapplands Teknik Ab | Avluftningsanordning vid en reservoar för ett hydraulsystem |
CN105736518A (zh) * | 2016-04-11 | 2016-07-06 | 现代精密塑胶模具(深圳)有限公司 | 一种注塑机 |
CN105971984A (zh) * | 2016-05-12 | 2016-09-28 | 张华芳 | 一种采用磁化、离心、吸附和旋转磁场处理液压油的方法 |
CN106050814A (zh) * | 2016-05-12 | 2016-10-26 | 张华芳 | 用磁化、离心、电控环吸附和旋转磁场处理液压油的方法 |
CN106015182A (zh) * | 2016-05-12 | 2016-10-12 | 绍兴文理学院 | 一种采用磁化和吸附处理液压油的方法 |
CN105889150A (zh) * | 2016-05-12 | 2016-08-24 | 绍兴文理学院 | 一种采用起电、分离和吸附处理液压油的方法 |
CN105909570A (zh) * | 2016-05-12 | 2016-08-31 | 绍兴文理学院 | 一种采用起电、分离和电击锤吸附处理液压油的方法 |
CN105864171A (zh) * | 2016-05-12 | 2016-08-17 | 绍兴文理学院 | 一种采用起电、分离和电控环吸附处理液压油的方法 |
CN105864187A (zh) * | 2016-05-12 | 2016-08-17 | 绍兴文理学院 | 一种采用磁化和电击锤吸附处理液压油的方法 |
CN105864118A (zh) * | 2016-05-12 | 2016-08-17 | 张华芳 | 一种采用起电、旋转磁场分离和吸附处理液压油的方法 |
CN105889187A (zh) * | 2016-05-12 | 2016-08-24 | 绍兴文理学院 | 一种采用磁化和电控环吸附处理液压油的方法 |
CN105864186A (zh) * | 2016-05-12 | 2016-08-17 | 绍兴文理学院 | 一种采用磁化、电控环吸附和旋转磁场处理液压油的方法 |
CN105909602A (zh) * | 2016-05-12 | 2016-08-31 | 李伟波 | 一种采用起电、均匀磁场分离和吸附处理液压油的方法 |
CN105864188A (zh) * | 2016-05-12 | 2016-08-17 | 绍兴文理学院 | 一种采用磁化、吸附和旋转磁场处理液压油的方法 |
CN105889151A (zh) * | 2016-05-12 | 2016-08-24 | 张华芳 | 采用磁化、旋流离心、吸附和旋转磁场处理液压油的方法 |
CN105889146A (zh) * | 2016-05-12 | 2016-08-24 | 张华芳 | 用起电、旋转磁场分离和旋转磁场处理液压油的方法 |
CN110500327A (zh) * | 2019-08-26 | 2019-11-26 | 广西柳工机械股份有限公司 | 挖掘机降泡液压油箱 |
CN110425184A (zh) * | 2019-08-26 | 2019-11-08 | 广西柳工机械股份有限公司 | 装载机降泡液压油箱 |
CN111895259B (zh) * | 2020-07-10 | 2021-11-12 | 中国航发湖南动力机械研究所 | 集成式储油箱 |
US12117022B2 (en) * | 2021-04-08 | 2024-10-15 | Caterpillar Inc. | Hydraulic oil diffuser |
CN113799955B (zh) * | 2021-09-27 | 2023-03-24 | 广船国际有限公司 | 一种滑油净化的隔离装置及船舶 |
US12031463B1 (en) * | 2023-05-31 | 2024-07-09 | Deltahawk Engines, Inc. | Separator for liquid and gas |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5042049U (ja) * | 1973-08-20 | 1975-04-28 | ||
JPS61114102U (ja) * | 1984-12-28 | 1986-07-18 | ||
JPS61194805U (ja) * | 1985-05-29 | 1986-12-04 | ||
JPS637514U (ja) * | 1986-06-30 | 1988-01-19 | ||
JPH03278804A (ja) * | 1990-03-29 | 1991-12-10 | Toppan Printing Co Ltd | 給水循環タンクの消泡フィルター装置及びそれを使用した消泡方法 |
JPH0470111U (ja) * | 1990-10-31 | 1992-06-22 | ||
JPH07308512A (ja) * | 1994-05-17 | 1995-11-28 | Aisin Chem Co Ltd | 消泡装置 |
JP2000024407A (ja) | 1998-07-14 | 2000-01-25 | Mitsubishi Heavy Ind Ltd | 戻り油泡消し装置 |
JP2004084923A (ja) | 2002-05-22 | 2004-03-18 | Komatsu Ltd | 液体タンク |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1038847B (de) * | 1953-08-20 | 1958-09-11 | Friedrich Bilabel | Vorrichtung zum Absetzen, Filtern, Kuehlen, Entgasen, Entlueften, Entfeuchten und Unterdruck-setzen von OEl oder oelartigen Schmier- und Kuehlfluessigkeiten fuer die Schmierung und/oder Kuehlung von Maschinen und Zubehoereinrichtungen in Walzenstrassen oder sonstigen Grossmaschinen |
GB1236931A (en) * | 1967-07-19 | 1971-06-23 | Bolton Mining Eng | Combined settling and flotation tank |
DE1942301A1 (de) * | 1969-08-20 | 1971-03-04 | Ver Flugtechnische Werke | Luftabscheider zur Aufbereitung des zurueckfliessenden Schmieroels fuer schwenkbare Triebwerke |
US4210176A (en) * | 1978-09-14 | 1980-07-01 | J. I. Case Company | Hydraulic liquid reservoir with internal baffle |
DE4014955C1 (ja) * | 1990-05-10 | 1991-06-13 | Hydac Technology Gmbh, 6603 Sulzbach, De | |
US6116454A (en) * | 1998-10-01 | 2000-09-12 | Caterpillar Inc. | Hydraulic oil tank with integral baffle |
US7886768B2 (en) * | 2004-11-04 | 2011-02-15 | Komatsu Ltd. | Hydraulic fluid tank |
-
2011
- 2011-01-27 JP JP2011015034A patent/JP5550576B2/ja active Active
- 2011-02-01 US US13/576,948 patent/US8739822B2/en not_active Expired - Fee Related
- 2011-02-01 CN CN201180008348XA patent/CN102762874A/zh active Pending
- 2011-02-01 EP EP11739745.5A patent/EP2532899B1/en not_active Not-in-force
- 2011-02-01 KR KR1020127020905A patent/KR20120121896A/ko not_active Application Discontinuation
- 2011-02-01 WO PCT/JP2011/052042 patent/WO2011096397A1/ja active Application Filing
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5042049U (ja) * | 1973-08-20 | 1975-04-28 | ||
JPS61114102U (ja) * | 1984-12-28 | 1986-07-18 | ||
JPS61194805U (ja) * | 1985-05-29 | 1986-12-04 | ||
JPS637514U (ja) * | 1986-06-30 | 1988-01-19 | ||
JPH03278804A (ja) * | 1990-03-29 | 1991-12-10 | Toppan Printing Co Ltd | 給水循環タンクの消泡フィルター装置及びそれを使用した消泡方法 |
JPH0470111U (ja) * | 1990-10-31 | 1992-06-22 | ||
JPH07308512A (ja) * | 1994-05-17 | 1995-11-28 | Aisin Chem Co Ltd | 消泡装置 |
JP2000024407A (ja) | 1998-07-14 | 2000-01-25 | Mitsubishi Heavy Ind Ltd | 戻り油泡消し装置 |
JP2004084923A (ja) | 2002-05-22 | 2004-03-18 | Komatsu Ltd | 液体タンク |
Non-Patent Citations (1)
Title |
---|
See also references of EP2532899A4 |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016036954A (ja) * | 2014-08-07 | 2016-03-22 | 株式会社ソディック | 射出成形機の作動油タンクまたは補助油タンク |
CN106018218A (zh) * | 2016-05-12 | 2016-10-12 | 李伟波 | 用液压滤波、电磁离心和相邻电容的磨损微粒监测方法 |
CN106018212A (zh) * | 2016-05-12 | 2016-10-12 | 李伟波 | 一种用滤波、离心和相邻电容的磨损微粒在线监测方法 |
CN106018220A (zh) * | 2016-05-12 | 2016-10-12 | 李伟波 | 用液压滤波、离心和相邻电容的磨损微粒在线监测方法 |
CN106018213A (zh) * | 2016-05-12 | 2016-10-12 | 李伟波 | 采用滤波、电磁离心分离和相邻电容的磨损微粒监测方法 |
CN110195816A (zh) * | 2019-06-21 | 2019-09-03 | 杭州汽轮动力集团有限公司 | 用于燃气轮机润滑油箱的除气盘 |
WO2021092101A1 (en) * | 2019-11-06 | 2021-05-14 | Caterpillar Inc. | Hydraulic tank |
US11708684B2 (en) | 2019-11-06 | 2023-07-25 | Caterpillar Inc. | Hydraulic tank |
Also Published As
Publication number | Publication date |
---|---|
US20120305114A1 (en) | 2012-12-06 |
EP2532899B1 (en) | 2017-08-16 |
EP2532899A1 (en) | 2012-12-12 |
JP2011179684A (ja) | 2011-09-15 |
US8739822B2 (en) | 2014-06-03 |
KR20120121896A (ko) | 2012-11-06 |
EP2532899A4 (en) | 2014-04-30 |
CN102762874A (zh) | 2012-10-31 |
JP5550576B2 (ja) | 2014-07-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5550576B2 (ja) | 油タンク | |
JP2011179684A5 (ja) | ||
JP4270074B2 (ja) | リザーバタンク | |
JP2010264355A (ja) | 浮上油回収装置 | |
JP5739589B2 (ja) | 液中気泡の分離除去循環システム | |
CN112762222B (zh) | 一种浮球式排水阀 | |
JP2014194279A (ja) | 油タンク | |
ES2310844T3 (es) | Dispositivo de ventilacion de un tubo de descarga de un electrodomestico de conduccion de agua. | |
JP2017190655A5 (ja) | ||
JP2015016471A (ja) | 空圧回路 | |
JP2024055922A (ja) | 水中ポンプ装置およびそれを用いた水中ポンプシステム | |
JP2017190655A (ja) | 阻集器 | |
CN112777667A (zh) | 一种气液相分离装置 | |
JP2011179190A (ja) | 戸溝の堆積物排出方法 | |
JP2010180810A (ja) | 立軸ポンプ | |
JP2011158029A (ja) | 油タンク | |
JP2011196527A (ja) | 作動油タンク | |
JP2004011873A (ja) | 液体タンク | |
CN102116325A (zh) | 一种液压油箱的呼吸器及工程机械 | |
JP2012225061A (ja) | 油圧式作業機械の作動油タンク | |
JP2011169360A (ja) | 油タンク | |
JP5596104B2 (ja) | ポンプ設備 | |
KR200479101Y1 (ko) | 물탱크용 깔대기 | |
CN214936182U (zh) | 一种气液相分离装置 | |
JP6033195B2 (ja) | ダムの浚渫システム |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201180008348.X Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11739745 Country of ref document: EP Kind code of ref document: A1 |
|
DPE1 | Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 6804/CHENP/2012 Country of ref document: IN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13576948 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 20127020905 Country of ref document: KR Kind code of ref document: A |
|
REEP | Request for entry into the european phase |
Ref document number: 2011739745 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011739745 Country of ref document: EP |