CN104863909A - Spring pressurization closed type hydraulic oil tank with volume, pressure and leakage detecting function - Google Patents

Spring pressurization closed type hydraulic oil tank with volume, pressure and leakage detecting function Download PDF

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Publication number
CN104863909A
CN104863909A CN201510183402.4A CN201510183402A CN104863909A CN 104863909 A CN104863909 A CN 104863909A CN 201510183402 A CN201510183402 A CN 201510183402A CN 104863909 A CN104863909 A CN 104863909A
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CN
China
Prior art keywords
piston
fuel tank
hydraulic
oil tank
base plate
Prior art date
Application number
CN201510183402.4A
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Chinese (zh)
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CN104863909B (en
Inventor
欧阳小平
范伯骞
丁硕
杨华勇
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浙江大学
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Application filed by 浙江大学 filed Critical 浙江大学
Priority to CN201510183402.4A priority Critical patent/CN104863909B/en
Publication of CN104863909A publication Critical patent/CN104863909A/en
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Publication of CN104863909B publication Critical patent/CN104863909B/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/26Supply reservoir or sump assemblies
    • F15B1/265Supply reservoir or sump assemblies with pressurised main reservoir
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F15B19/005Fault detection or monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04Special measures taken in connection with the properties of the fluid
    • F15B21/042Controlling the temperature of the fluid

Abstract

The invention discloses a spring pressurization closed type hydraulic oil tank with the volume, pressure and leakage detecting function. The spring pressurization closed type hydraulic oil tank comprises a stay wire sensor, a first mini-type pressure sensor, a second mini-type pressure sensor, a first piston seal ring, a second piston seal ring and base plate static seal rings, wherein annular radial radiating fins are arranged on the outer side surface of the oil tank barrel; annular sealing grooves are formed in the end surface of the bottom end of the oil tank barrel; each base plate static seal ring is mounted inside the corresponding annular sealing groove; the stay wire sensor is mounted on the top surface of an upper plate; the first mini-type pressure sensor and the second mini-type pressure sensor both connected with an accommodating chamber are mounted on a piston; two through holes respectively serving as an oil inlet and an oil outlet of the oil tank are machined in a base plate; the oil tank is connected with an external valve block by taking the bottom surface of the base plate as a mounting surface and by adopting a plate-type mounting manner. According to the invention, the hydraulic oil tank is compact in structure, small in occupied space, and isolated from air, can be used for pressurizing accommodated hydraulic media, and can adapt to the volume variation of the accommodated hydraulic media; the sensors of the oil tank can be used for monitoring the volume and pressure of the hydraulic media in the oil tank in a real-time manner, and can be used for monitoring whether the oil tank leaks or not, so that powerful data support can be provided for healthy management of the hydraulic system provided with the oil tank.

Description

With the spring pressurizing closed hydraulic oil container of volume, pressure and leakage detection function
Technical field
The present invention relates to a kind of pressurization hydraulic fuel tank, particularly relate to a kind of spring pressurizing closed hydraulic oil container with volume, pressure and leakage detection function, for providing hydraulic oil supply to hydraulic system in the running mechanism device such as vehicle, robot.
Background technique
Hydraulic system has power/quality than advantages such as high, High power outputs, therefore moving, also have in running mechanism device and apply comparatively widely, as joint of robot drive, large vehicle turning device, and the engineering machinery such as excavator, loader.These devices compare bottom surface fixed equipment usually lightweight, volume is little, have higher demand in compact structure etc.
Conventional hydraulic fuel tank in these devices is open type oil tank, and in open type oil tank, hydraulic medium is not full of fuel tank completely, and the air in fuel tank is connected with fuel tank ambient atmosphere.When fluid in fuel tank reduces, volume declines, and air enters fuel tank; Otherwise volume rises, air discharges fuel tank.In this open type oil tank, there is the easy entrained air of hydraulic medium and by the problem of the particle contamination in air, and fuel tank rocks when traveling gear works, and likely makes hydraulic system be mixed into large quantity of air, makes hydraulic system performance and reliability decrease.In addition, the pumping source of traveling gear hydraulic system needs certain inlet pressure usually, produces the detrimental effect such as cavitation, cavitation erosion to reduce hydraulic medium when entering oil hydraulic pump.
In the continuous intelligentized development trend of machinery now, the relevant status monitoring function of fuel tank for enhancing device intelligence, improve the aspects such as functional reliability and play an important role.
Therefore lack now a kind of with air insulated, the sealed reservoir that there is pressurization, there is certain fuel tank work state monitoring function, for the hydraulic system of traveling gear.
Summary of the invention
The object of the invention is to propose a kind of spring pressurizing closed hydraulic oil container with volume, pressure and leakage detection function.Hydraulic oil tank structure of the present invention is compact, with air exclusion, can carry out supercharging also can adapt to held hydraulic medium volume change to held hydraulic medium; Whether the sensor that possesses of this fuel tank can volume, the pressure of hydraulic medium in Real-Time Monitoring fuel tank simultaneously, also can monitor this pressurized fuel tank and leak.
The technical solution used in the present invention is:
The piston that the present invention includes upper plate, fuel tank bucket, base plate and be assemblied in fuel tank bucket, the top of fuel tank bucket connects upper plate, and the bottom of fuel tank bucket is connected with base plate and seals, and between piston and upper plate, spring is housed; Comprise stay wire sensor, first piston seal ring, the second piston packing and base plate static sealing ring; Fuel tank bucket outer side surface is provided with annular spoke plate-shaped fin, the fuel tank bucket bottom end face be connected with base plate is provided with annular seal groove, annular seal groove is built with base plate static sealing ring, the sidewall of piston has twice annular seal groove, and first piston seal ring and the second piston packing are housed in twice annular seal groove respectively; Both ends of the spring is connected with upper plate with piston respectively, and stay wire sensor is arranged on upper sheet top surface, and the upper plate that is drawstring through of stay wire sensor is fixedly connected with piston and is connected; Piston bottom surface end face edge is provided with annular protrusion, base plate is processed with the through hole that two are used separately as fuel tank filler opening and oil outlet, and with base plate bottom surface, for attachment face adopts, subbase mounted mode connects external hydraulic system valve block to described fuel tank.
The base plate of described piston is also separately installed with the first micro pressure sensor and the second micro pressure sensor, first micro pressure sensor is connected with the hydraulic medium cavity volume of piston end surface, and the middle cavity volume between the second micro pressure sensor with piston side wall two seals groove is connected.
Described Piston Machining has hydraulic pressure runner, the hydraulic pressure runner of the first described micro pressure sensor in piston is connected with the hydraulic medium cavity volume of piston end surface, and the second described micro pressure sensor another hydraulic pressure runner in piston is connected with the middle cavity volume between piston side wall two seals groove.
The beneficial effect that the present invention has is:
Oiltank structure of the present invention is compact, occupy little space, and with air exclusion, can carry out supercharging to held hydraulic medium and can adapt to held hydraulic medium volume change, the radiating fin of tank surface has heat sinking function;
Whether the sensor that fuel tank of the present invention possesses can volume, the pressure of hydraulic medium in Real-Time Monitoring fuel tank, also can monitor fuel tank and leak, for its place hydraulic system health control provides Data support.
Accompanying drawing explanation
Fig. 1 is generalized section of the present invention.
Fig. 2 is that axle of the present invention measures intention.
Fig. 3 is base plate attachment face schematic diagram of the present invention.
Fig. 4 is the structural representation of inventive piston bottom surface without annular protrusion.
Fig. 5 is the structural representation of inventive piston bottom surface with annular protrusion effect.
In figure: 1, upper plate, 2, fuel tank bucket, 3, base plate, 4, piston, 5, spring, 6, stay wire sensor, 7, the first micro pressure sensor, 8, the second micro pressure sensor, 9, first piston seal ring, the 10, second piston packing, 11, base plate static sealing ring, 12, annular protrusion, 13, through hole, 14, active area.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As shown in Figure 1, the piston 4 that the present invention includes upper plate 1, fuel tank bucket 2, base plate 3 and be assemblied in fuel tank bucket 2, the top of fuel tank bucket 2 connects upper plate 1, the bottom of fuel tank bucket 2 is connected with base plate 3 and seals, spring 5 is housed between piston 4 and upper plate 1, fuel tank bucket, base plate, is assemblied in piston in fuel tank bucket and corresponding seal ring surrounds airtight cavity to hold hydraulic medium.
As depicted in figs. 1 and 2, stay wire sensor 6, first micro pressure sensor 7, second micro pressure sensor 8, first piston seal ring 9, second piston packing 10 and base plate static sealing ring 11 is also comprised; Fuel tank bucket 2 outer side surface is provided with annular spoke plate-shaped fin, the fuel tank bucket 2 bottom end face be connected with base plate 3 is provided with annular seal groove, annular seal groove is built with base plate static sealing ring 11, the sidewall of piston 4 has twice annular seal groove, first piston seal ring 9 and the second piston packing 10 are housed in twice annular seal groove respectively, first piston seal ring 9 is arranged on the annular seal groove near linking springs one end, and the second piston packing 10 is arranged on the annular seal groove near hydraulic medium one end; Spring 5 two ends are connected with upper plate 1 with piston 4 respectively, and stay wire sensor 6 is arranged on upper plate 1 end face, and the upper plate 1 that is drawstring through of stay wire sensor 6 is fixedly connected with piston 4 and is connected.
Spring of the present invention is assemblied in upper plate, piston and fuel tank bucket, spring one end is connected with upper plate, and the other end is connected with piston, promotes piston and makes the hydraulic medium in fuel tank produce pressure, promote piston movement when hydraulic medium volume change simultaneously, ensure that volume of fuel tank changes with dielectric capacity.Its stay wire sensor is fixed on upper plate, and the bracing wire of stay wire sensor is connected on piston, and the distance measured between upper plate and piston calculates volume of fuel tank.
As depicted in figs. 1 and 2, the base plate of piston 4 is separately installed with the first micro pressure sensor 7 and the second micro pressure sensor 8, the runner respectively by processing on piston 4 is connected with the cavity volume that fuel tank cavity volume, first piston seal ring 9 surround with the second piston packing 10.Specifically, the first micro pressure sensor 7 is connected with the hydraulic medium cavity volume of piston end surface, and the middle cavity volume between the second micro pressure sensor 8 with piston side wall two seals groove is connected; First micro pressure sensor can measure hydraulic medium pressure by hydraulic pressure runner; Second micro pressure sensor measures the pressure between two seal rings by hydraulic pressure runner, and when can be used to detect normal work, whether the second piston packing more easy to wear exists leakage.
As shown in Figure 3, base plate 3 is processed with the through hole 13 that two are used separately as fuel tank filler opening and oil outlet, with base plate 3 bottom surface, for attachment face adopts, subbase mounted mode connects external hydraulic system valve block to described fuel tank.
Piston 4 is processed with hydraulic pressure runner, the hydraulic pressure runner of the first described micro pressure sensor 7 in piston 4 is connected with the hydraulic medium cavity volume of piston end surface, and the second described micro pressure sensor 8 another hydraulic pressure runner in piston 4 is connected with the middle cavity volume between piston side wall two seals groove.
Piston 4 bottom surface end face edge is provided with annular protrusion 12, when annular protrusion 12 is used for ensureing that piston 4 contacts with base plate 3, fuel tank has certain volume, ensure that fuel tank is unimpeded into and out of hydraulic fluid port when minimum volume, and now fuel tank has a certain amount of fluid, fuel tank piston 4 when topping up can be made to be promoted smoothly.
Specific embodiment of the invention working procedure is as follows:
Fuel tank filler opening of the present invention, oil outlet and the board-like installation of its place hydraulic system, avoid the employing of pipe joint, because this reducing the space between fuel tank and its place hydraulic system, can make that hydraulic system overall structure is compacter, level of integration is higher.
When fuel tank of the present invention is applied in and normally works in hydraulic system, the spring in fuel tank promotes piston 4, makes the hydraulic medium in fuel tank have certain initial pressure.In addition, the hydraulic system when fuel tank place consumes hydraulic medium volume, and such as asymmetrical cylinder piston rod stretches out or accumulator topping up, and now spring 5 promotes piston 4 and moves, the corresponding minimizing of this volume of fuel tank; Otherwise piston 4 is pushed back by hydraulic medium, volume of fuel tank is corresponding to be increased, thus ensures that fuel tank has the ability holding hydraulic medium Volume Changes.
Be that piston 4 can be in arbitrary position and all can not interfere with filler opening, oil outlet by fuel tank filler opening of the present invention and the oil outlet beneficial effect be all arranged on base plate 3, therefore the active position of piston 4 is longer, and the Volume Changes that fuel tank can hold is more.
If piston 4 is smooth towards the one side of hydraulic medium cavity volume, can fit tightly with base plate 3 at the secondary piston 4 being filled with hydraulic medium.If be now filled with hydraulic medium, the active area of hydraulic medium promotion piston 4 is only the less active area 14 corresponding to filler opening, as Fig. 4, is therefore difficult to promote piston 4 and hydraulic medium is filled with.If piston 4 is provided with annular protrusion 12 towards an edge of hydraulic medium cavity volume, then when being filled with hydraulic medium, medium promotes the area of piston 4 is larger active areas 14 that annular protrusion surrounds, and as Fig. 5, therefore easily promotes piston 4 and hydraulic medium is filled with.
When measuring the distance between piston 4 and upper plate 1, according to draw bar displacement sensor, then the pull bar of draw bar displacement sensor must placement parallel with fuel tank bucket, makes fuel tank entire length elongated.Adopt stay wire sensor 6, this fuel tank overall volume can be made less, more compact structure, and stay wire sensor is easy to install, and can hold larger mounting point, angular error.
When this pressurized fuel tank Sealing is normal, second piston packing 10 can play seal action, hydraulic medium is stopped the middle cavity volume entered between piston side wall two seals groove, therefore the pressure reduction on the second piston packing 10 both sides is comparatively large and the pressure reduction on first piston seal ring 9 both sides is less, thus pressure measured by the second micro pressure sensor 8 is less.Second piston packing 10 both sides pressure reduction is comparatively large, therefore more easy to wear relative to first piston seal ring 9.After the second piston packing 10 weares and teares, sealability declines, and both sides pressure reduction reduces, and hydraulic medium leaks into the middle cavity volume between piston side wall two seals groove, makes middle chamber pressure increase.Therefore the pressure increase measured when the second micro pressure sensor 8 to certain threshold value, namely illustrate the second piston packing experience wear and leak, there is hidden danger in fuel tank sealing, realizes leakage detection function with this.
Compact structure of the present invention, to occupy little space, can volume, the pressure of hydraulic medium in Real-Time Monitoring fuel tank by sensor, whether monitoring fuel tank leaks, for its place hydraulic system health control provides abundant Data support; And can supercharging be carried out to held hydraulic medium and held hydraulic medium volume change can be adapted to, there is outstanding significant technique effect.
Above-mentioned embodiment is used for explaining and the present invention is described above, instead of limits the invention, and in the protection domain of spirit of the present invention and claim, any amendment make the present invention and change, all fall into protection scope of the present invention.

Claims (3)

1. the spring pressurizing closed hydraulic oil container with volume, pressure and leakage detection function, the piston (4) comprising upper plate (1), fuel tank bucket (2), base plate (3) and be assemblied in fuel tank bucket (2), the top of fuel tank bucket (2) connects upper plate (1), the bottom of fuel tank bucket (2) is connected with base plate (3) and seals, spring (5) is housed between piston (4) and upper plate (1), it is characterized in that:
Comprise stay wire sensor (6), first piston seal ring (9), the second piston packing (10) and base plate static sealing ring (11); Fuel tank bucket (2) outer side surface is provided with annular spoke plate-shaped fin, fuel tank bucket (2) the bottom end face be connected with base plate (3) is provided with annular seal groove, annular seal groove is built with base plate static sealing ring (11), the sidewall of piston (4) has twice annular seal groove, and first piston seal ring (9) and the second piston packing (10) are housed in twice annular seal groove respectively; Spring (5) two ends are connected with upper plate (1) with piston (4) respectively, and stay wire sensor (6) is arranged on upper plate (1) end face, and the upper plate (1) that is drawstring through of stay wire sensor (6) is fixedly connected with piston (4);
Piston (4) bottom surface end face edge is provided with annular protrusion (12), base plate (3) is processed with the through hole (13) that two are used separately as fuel tank filler opening and oil outlet, described fuel tank is that attachment face adopts subbase mounted mode to connect external hydraulic system valve block with base plate (3) bottom surface.
2. a kind of spring pressurizing closed hydraulic oil container with volume, pressure and leakage detection function according to claim 1, it is characterized in that: the base plate of described piston (4) is also separately installed with the first micro pressure sensor (7) and the second micro pressure sensor (8), first micro pressure sensor (7) is connected with the hydraulic medium cavity volume of piston end surface, and the middle cavity volume between the second micro pressure sensor (8) with piston side wall two seals groove is connected.
3. a kind of spring pressurizing closed hydraulic oil container with volume, pressure and leakage detection function according to claim 1, it is characterized in that: described piston (4) is processed with hydraulic pressure runner, the hydraulic pressure runner of described the first micro pressure sensor (7) in piston (4) is connected with the hydraulic medium cavity volume of piston end surface, and described the second micro pressure sensor (8) another hydraulic pressure runner in piston (4) is connected with the middle cavity volume between piston side wall two seals groove.
CN201510183402.4A 2015-04-18 2015-04-18 With the spring pressurizing closed hydraulic oil container of volume, pressure and leakage detection function CN104863909B (en)

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CN104863909B CN104863909B (en) 2016-03-02

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105526348A (en) * 2016-01-29 2016-04-27 朱苗君 Inflation-free pressure bucket
CN107061381A (en) * 2017-04-22 2017-08-18 新乡市新倍增自动化设备有限公司 A kind of Electrical hydrostatic actuator variable volume fuel tank
CN107763009A (en) * 2017-09-29 2018-03-06 象山信基机械厂 The method of work of lathe-used hydraulic cylinder detection means
CN110778542A (en) * 2019-10-23 2020-02-11 天津大学 Closed pressure regulating oil tank for high-precision detection of oil quantity
CN111536547A (en) * 2020-05-08 2020-08-14 山西大学 Spring type self-stabilizing device for fuel oil system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3759144A (en) * 1970-08-17 1973-09-18 Amada Co Ltd Hydraulic actuating system for hydraulically operated bending machine
US20030000373A1 (en) * 2000-02-04 2003-01-02 Jurgen Weber Method and device for controlling a lift cylinder, especially of working machines
CN101372989A (en) * 2008-07-08 2009-02-25 中国船舶重工集团公司第七○二研究所 Deep sea hydraulic oil tank with multiple monitoring functions
CN103148046A (en) * 2013-03-14 2013-06-12 西安交通大学 Alternating current servo direct-drive supercharged three-layer piston electrohydraulic cylinder and supercharging method
CN104314912A (en) * 2014-08-25 2015-01-28 南车株洲电力机车有限公司 Gas-liquid pressure cylinder
CN104329302A (en) * 2014-10-10 2015-02-04 北京机械设备研究所 Progressive pressurizing oil tank

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3759144A (en) * 1970-08-17 1973-09-18 Amada Co Ltd Hydraulic actuating system for hydraulically operated bending machine
US20030000373A1 (en) * 2000-02-04 2003-01-02 Jurgen Weber Method and device for controlling a lift cylinder, especially of working machines
CN101372989A (en) * 2008-07-08 2009-02-25 中国船舶重工集团公司第七○二研究所 Deep sea hydraulic oil tank with multiple monitoring functions
CN103148046A (en) * 2013-03-14 2013-06-12 西安交通大学 Alternating current servo direct-drive supercharged three-layer piston electrohydraulic cylinder and supercharging method
CN104314912A (en) * 2014-08-25 2015-01-28 南车株洲电力机车有限公司 Gas-liquid pressure cylinder
CN104329302A (en) * 2014-10-10 2015-02-04 北京机械设备研究所 Progressive pressurizing oil tank

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105526348A (en) * 2016-01-29 2016-04-27 朱苗君 Inflation-free pressure bucket
CN107061381A (en) * 2017-04-22 2017-08-18 新乡市新倍增自动化设备有限公司 A kind of Electrical hydrostatic actuator variable volume fuel tank
CN107763009A (en) * 2017-09-29 2018-03-06 象山信基机械厂 The method of work of lathe-used hydraulic cylinder detection means
CN107763009B (en) * 2017-09-29 2019-03-15 象山信基机械厂 The working method of lathe-used hydraulic cylinder detection device
CN110778542A (en) * 2019-10-23 2020-02-11 天津大学 Closed pressure regulating oil tank for high-precision detection of oil quantity
CN111536547A (en) * 2020-05-08 2020-08-14 山西大学 Spring type self-stabilizing device for fuel oil system

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