CN112012970A - Fluid storage and supplement device and hydraulic system - Google Patents
Fluid storage and supplement device and hydraulic system Download PDFInfo
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- CN112012970A CN112012970A CN201910474527.0A CN201910474527A CN112012970A CN 112012970 A CN112012970 A CN 112012970A CN 201910474527 A CN201910474527 A CN 201910474527A CN 112012970 A CN112012970 A CN 112012970A
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- 239000012530 fluid Substances 0.000 title claims abstract description 106
- 239000013589 supplement Substances 0.000 title claims abstract description 26
- 238000005192 partition Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000000153 supplemental effect Effects 0.000 claims 1
- 239000011664 nicotinic acid Substances 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 116
- 239000010720 hydraulic oil Substances 0.000 description 10
- 238000007789 sealing Methods 0.000 description 7
- 238000005086 pumping Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000002775 capsule Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007901 soft capsule Substances 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
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Classifications
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- 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
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
- F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
The invention provides a fluid storage and supplement device and a hydraulic system, wherein the fluid storage and supplement device comprises a shell, a soft body bag is arranged in the shell, a central pipeline penetrates through the soft body bag, the two ends of the central pipeline, which penetrate out of the soft body bag, are respectively provided with an oil return port and an oil suction port, an outer cavity is formed between the inner wall of the shell and the outer wall of the soft body bag, and an inner cavity is formed between the inner wall of the soft body bag and the outer wall of the central pipeline; an oil inlet hole communicated with the inner cavity is formed in the central pipeline section left in the soft body bag and close to the oil return port, and an oil outlet hole communicated with the inner cavity is formed in the central pipeline section left in the soft body bag and close to the oil suction port. The present invention can maintain stable fluid supply to the hydraulic pump without leakage of stored fluid regardless of the posture swing and inversion of the device. The fluid storage and supplement device is particularly suitable for being applied to hydraulic systems carried by aircrafts, bionic robots and the like with violent body posture swinging motion.
Description
Technical Field
The invention relates to the field of hydraulic oil tanks, in particular to a fluid storage and supplement device and a hydraulic system.
Background
The traditional hydraulic oil tank can not change the posture greatly in operation, if the posture of the hydraulic oil tank is turned upside down, an outlet connected with an oil suction port of a hydraulic pump of a tank body is exposed outside the liquid level, the hydraulic pump sucks air, a large amount of air is mixed in fluid of a hydraulic system, cavitation erosion of a hydraulic element is caused, the fluid is oxidized, the incompressibility of the fluid is reduced, and the operation performance and the quality of the system are greatly damaged. Meanwhile, because the traditional hydraulic oil tank is provided with a vent hole which is communicated with the atmospheric pressure, if the hydraulic oil tank is turned upside down, a certain amount of fluid leaks and runs off from the vent hole, and the phenomenon that the fluid is oxidized due to long-term contact with air also exists in the normal placement and use of the hydraulic oil tank. Because the traditional hydraulic oil tank supplies oil to the hydraulic pump by means of the self gravity of fluid and atmospheric pressure, the liquid level of the fluid in the hydraulic oil tank needs to be higher than the oil suction port of the hydraulic pump by a certain height in consideration of the general working condition requirement of the hydraulic pump, so that the fluid in the oil suction port of the hydraulic pump is ensured to have certain pressure, otherwise, the service life of elements generated by pumping air of the hydraulic pump is reduced and the elements are damaged. Conventional hydraulic tanks therefore have to store relatively large amounts of fluid during operation, and are generally of a relatively large size and weight in design.
Chinese patent application publication No. CN 108488109 a (application No. 201810470622.9) discloses an oil leakage prevention hydraulic oil tank, including: leak protection sleeve, box and case top cap, the case top cap sets up on the box, set up inlet port and oil outlet on the box, the inlet tube stretches into extremely from the inlet port bottom half, oil outlet pipe stretch into extremely from the oil outlet bottom half, the entrance of inlet tube sets up filter equipment, set up the oil removal board between the inside inlet tube of box and the oil outlet pipe, the leak protection sleeve with the inside top surface fixed connection of box, the telescopic on surface of leak protection sets up a plurality of oil leak holes, the bottom of box sets up the draining hole, the inside temperature measuring device that sets up of box. According to the technical scheme, the oil in the oil tank is prevented from overflowing through the leakage-proof sleeve device, but the device still has oil leakage when the posture of the device rolls, and the device is not suitable for being applied to hydraulic systems carried by aircrafts, bionic robots and the like with violent body posture swinging motion.
Disclosure of Invention
The invention provides a fluid storage and supplement device and a hydraulic system, which can not leak stored fluid and can always maintain stable fluid supply for a hydraulic pump no matter what posture of the device swings and reverses.
A fluid storage and supplement device comprises a shell, wherein a soft body bag is arranged in the shell, a central pipeline penetrates through the soft body bag, an oil return port and an oil suction port are respectively arranged at two ends of the central pipeline, which penetrate out of the soft body bag, an outer cavity is formed between the inner wall of the shell and the outer wall of the soft body bag, and an inner cavity is formed between the inner wall of the soft body bag and the outer wall of the central pipeline;
an oil inlet hole communicated with the inner cavity is formed in the central pipeline section left in the soft body bag and close to the oil return port, and an oil outlet hole communicated with the inner cavity is formed in the central pipeline section left in the soft body bag and close to the oil suction port.
The fluid storage and supplement device is divided into an inner cavity and an outer cavity which are separated by a soft bag, the inner cavity stores fluid, and the outer cavity can be communicated with atmospheric pressure or is filled with compressed gas according to the specific working condition of a hydraulic system. The hydraulic system equipped with the fluid storage supplement device does not leak out the stored fluid regardless of the posture swing and inversion of the device, and can always maintain a stable fluid supply to the hydraulic pump. The outer cavity can store compressed gas and provide certain pressure for fluid stored in the inner cavity through the soft bag, so that the fluid in the oil suction pipe of the hydraulic pump has certain pressure, the stable working condition of the hydraulic pump is guaranteed, and the service life of elements of the hydraulic pump is prolonged. The fluid storage and supplement device is particularly suitable for being applied to hydraulic systems carried by aircrafts, bionic robots and the like with violent body posture swinging motion.
The following are preferred technical schemes of the invention:
the oil return pipeline is characterized in that a partition plate is arranged in the middle of the central pipeline, the inside of the central pipeline is divided into two parts, namely an oil return pipeline and an oil outlet pipeline, by the partition plate, the outer end of the oil return pipeline is an oil return opening, and the outer end of the oil outlet pipeline is an oil suction opening.
The oil inlet hole is arranged on the oil return pipeline, and the oil return port is communicated with the inner cavity through the oil inlet hole.
The oil outlet is arranged on the oil outlet pipeline, and the inner cavity is communicated with the oil suction port through the oil outlet.
The outer wall of the central pipeline is fixedly connected with the soft bag in a sealing way, the soft bag can be directly vulcanized at two ends of the outer surface of the central pipeline, also can be adhered at two ends of the outer surface of the central pipeline, and also can be fixedly connected with the anchor ear through the notch.
The bladder may be made of rubber or any other flexible material that will ensure a seal and will not be corroded by the fluid contained therein.
The outer shell is connected with the outer wall of the central pipeline in a sealing mode.
The shell is provided with a vent hole which is communicated with the outer cavity and is used for communicating the outer cavity with the atmosphere or injecting compressed gas into the outer cavity for storage through the vent hole, and the vent hole can be arranged at any position on the surface of the shell.
The vent hole is connected with a one-way valve, and a certain amount of compressed gas is filled into the outer cavity through the one-way valve, so that the trend of pressing the fluid stored in the soft bag to the oil suction port exists in the device permanently no matter the working state of the hydraulic pump. At the moment, the fluid can actively flow into the oil suction port of the hydraulic pump, certain fluid pressure is kept in the oil suction port of the hydraulic pump, and the phenomenon that the surface of an element is cavitated due to the fact that the fluid is not supplemented timely and the oil suction port is vacuumed due to the fact that the hydraulic pump runs at a high speed is avoided.
The shell is provided with a pressure sensor, the detection end of the pressure sensor is communicated with the outer cavity and is used for monitoring the pressure of the outer cavity, and the pressure sensor can be arranged at any position on the surface of the shell.
An open hydraulic system comprises a fluid storage and supplement device, a hydraulic pump and an oil return pipe, wherein an oil suction port of the fluid storage and supplement device is communicated with the hydraulic pump, and an oil return port of the fluid storage and supplement device is communicated with the oil return pipe.
A closed hydraulic system comprises a fluid storage and supplement device and a hydraulic pump, wherein one of an oil suction port and an oil return port of the fluid storage and supplement device is closed, the other one of the oil suction port and the oil return port is communicated with the hydraulic pump, a vent hole is connected with a one-way valve, and a certain amount of compressed gas is filled into an outer cavity through the one-way valve, so that the trend of pressing fluid stored in a soft bag to the oil suction port exists in the device permanently no matter the working state of the hydraulic pump. At the moment, the fluid can actively flow into the oil suction port of the hydraulic pump, certain fluid pressure is kept in the oil suction port of the hydraulic pump, and the phenomenon that the surface of an element is cavitated due to the fact that the fluid is not supplemented timely and the oil suction port is vacuumed due to the fact that the hydraulic pump runs at a high speed is avoided. The device can replace an oil replenishing pump in a closed hydraulic system. Has the advantages of small volume, light weight, simple structure and no energy consumption.
A method of calculating a stored volume of fluid in real time using a fluid storage replenishment device, comprising:
an open hydraulic system is adopted, when the inner cavity is exhausted, compressed gas is injected into the outer cavity, and then the reading P of the pressure sensor at the moment is recorded0When the hydraulic system is in operation, the pre-recorded reading P is passed0And real-time reading P of the pressure sensortCalculating the volume V of fluid stored in the inner cavityl：
Vl＝Vmax(1-P0/Pt)
In the above formula VmaxThe maximum volume of the outer chamber, i.e. the volume of the outer chamber when the inner chamber is emptied of all fluid.
Compared with the prior art, the invention has the following advantages:
the fluid in the soft bag in the device does not have any channel communicated with the outside except the oil return port and the oil suction port, and the oil return port and the oil suction port are connected in a hydraulic circuit when being installed in a hydraulic system, so that the stored fluid cannot leak to the outside no matter how the posture of the device changes;
if the vent hole of the device is communicated with the atmosphere, when the hydraulic pump sucks the fluid stored in the device through the oil suction port, the pressure of the inner cavity is reduced, and the pressure of the outer cavity is constantly equal to the atmospheric pressure, so that the air in the outer cavity extrudes the fluid stored in the device through the soft bag to force the fluid to flow into the oil suction port, and the fluid is favorably sucked by the hydraulic pump. This advantageous effect is also present in the same mechanism in conventional hydraulic oil tanks with the space above the liquid level being open to atmospheric pressure. However, the soft bag in the device isolates the contact between the fluid and the outside atmosphere, and simultaneously does not prevent the outside atmosphere pressure from generating extrusion force on the internal fluid, so that the device has the same pumping effect of the hydraulic pump, and simultaneously prevents the phenomenon of oxidation deterioration caused by the long-term contact between the internal stored fluid and the outside atmosphere;
the soft bag in the device has low weight inertia, and if the flow of the hydraulic pump is changed violently, the soft bag can be deformed rapidly under the action of the pressure in the outer cavity, and fluid is stably provided for the oil suction port of the hydraulic pump through rapid deformation.
If the vent hole of the device is connected with a one-way valve and a certain amount of compressed gas is filled into the outer cavity through the one-way valve, the trend of pressing the fluid stored in the soft bag towards the oil suction port exists in the device permanently no matter the working state of the hydraulic pump. At the moment, the fluid can actively flow into the oil suction port of the hydraulic pump, certain fluid pressure is kept in the oil suction port of the hydraulic pump, and the phenomenon that the surface of an element is cavitated due to the fact that the fluid is not supplemented timely and the oil suction port is vacuumed due to the fact that the hydraulic pump runs at a high speed is avoided.
The device can replace an oil replenishing pump in a closed hydraulic system. Has the advantages of small volume, light weight, simple structure and no energy consumption.
Drawings
FIG. 1 is a schematic view of a fluid storage and replenishment device according to the present invention;
FIG. 2 is a schematic diagram of an open hydraulic system employing a fluid storage and replenishment system in accordance with the present invention;
FIG. 3 is a schematic diagram of a closed hydraulic system employing a fluid storage and replenishment device in accordance with the present invention;
FIG. 4 is a schematic view of the fluid storage and replenishment system of the present invention without the use of a baffle in the central conduit.
Detailed Description
As shown in fig. 1, a fluid storage and supplement device comprises a housing, a soft bag 5 is arranged in the housing, a central pipeline 6 penetrates through the soft bag 5, an oil return opening 7 and an oil suction opening 8 are respectively arranged at two ends of the central pipeline 6, which penetrate out of the soft bag 5, an outer cavity 13 is formed between the inner wall of the housing and the outer wall of the soft bag, and an inner cavity 14 is formed between the inner wall of the soft bag 5 and the outer wall of the central pipeline 6; an oil inlet hole 9 communicated with the inner cavity 14 is arranged on the section of the central pipeline 6 reserved in the soft body bag 5, which is close to the oil return port 7, and an oil outlet hole 10 communicated with the inner cavity 14 is arranged on the section of the central pipeline 6 reserved in the soft body bag 5, which is close to the oil suction port 8.
The middle position in the central pipeline 6 is provided with a partition plate 11, the inside of the central pipeline 6 is divided into two parts by the partition plate 11, namely an oil return pipeline and an oil outlet pipeline, the outer end of the oil return pipeline is an oil return opening 7, and the outer end of the oil outlet pipeline is an oil suction opening 8. The oil inlet hole 9 is arranged on the oil return pipeline; the oil outlet hole 10 is provided on the oil outlet pipe 10. The housing is provided with a vent hole 4, and the vent hole 4 is communicated with the outer cavity 13. The vent 4 is connected with a one-way valve. The pressure sensor 1 is mounted on the housing, and the detection end of the pressure sensor 1 is communicated with the outer cavity 13.
The fluid storage replenishment device comprises: a central pipeline 6 is arranged, the inside of the central pipeline is divided into two parts by a middle clapboard 11, and the inner cavities of the two parts are respectively communicated with an oil return opening 7 and an oil suction opening 8;
the oil return port 7 is communicated with an oil return path of the hydraulic system, and the oil suction port 8 is communicated with an oil suction port of a hydraulic pump in the hydraulic system;
the two ends of the outer surface of the central pipeline 6 are fixedly connected with the soft bag 5 in a sealing way, the soft bag can be directly vulcanized at the two ends of the outer surface of the central pipeline 6, or can be adhered at the two ends of the outer surface of the central pipeline 6, or can be fixedly connected with the anchor ear through the notch;
the soft body capsule 5 can be made of rubber or of various soft materials which can ensure sealing and are not corroded by the fluid in the soft body capsule;
an inner cavity 14 is formed between the outer surface of the central tube 6 and the inner surface of the soft capsule 5;
the oil return port 7 and the oil suction port 8 are communicated with the inner cavity 14 through an oil inlet hole 9 and an oil outlet hole 10 respectively;
the cover plate 2 and the shell 3 (the cover plate 2 and the shell 3 form the shell of the device of the invention) can be assembled together through threads or bolts, and the sealing rings 12 form the sealing between the cover plate 2 and the shell 3, the cover plate 2 and the outer surface of the central pipeline and the sealing between the shell 3 and the outer surface of the central pipeline 6;
an outer cavity 13 is formed between the inner surface of the element (namely the shell) fixedly connected by the cover plate 2 and the shell 3 and the outer surface of the soft bag 5;
the shell 3 is provided with a vent hole 4 which is communicated with the outer cavity 13 and is used for communicating the outer cavity 13 with the atmosphere or injecting compressed gas into the outer cavity 13 through the vent hole 4 for storage, and the vent hole 4 can be arranged at any part of the surface of the device and comprises a cover plate 2;
the outer surface of the device is provided with a pressure sensor 1 for monitoring the pressure of the outer cavity 13, and the pressure sensor 1 can be arranged at any position of the surface of the device, including the surfaces of the cover plate 2 and the shell 3;
the device has the following operation principle:
fluid returned by the hydraulic system enters the oil return port 7, flows into the inner cavity 14 through the oil inlet hole 9, and is stored in the inner cavity 14. The soft bag 5 isolates the fluid from the outside, and the fluid is always contained in the soft bag 5 and cannot leak no matter how the device swings. The hydraulic pump in the hydraulic system is in operation pumping fluid stored in the inner chamber 14 through the suction opening 8. The fluid stored in the inner chamber 14 is sucked into the oil suction port 8 through the oil outlet hole 10. In the pumping process of the hydraulic pump, the external atmospheric pressure or the compressed gas stored in the outer cavity 13 extrudes the soft body bag 5, and the soft body bag 5 is of a soft structure and can not resist the external pressure, so that the external atmospheric pressure or the compressed gas stored in the outer cavity 13 can extrude the fluid stored in the soft body bag 5 to the oil suction port 8, the difficulty of oil suction of the hydraulic pump is greatly reduced, or the fluid is actively conveyed into the oil suction port of the hydraulic pump, the pressure in the oil suction port of the hydraulic pump is improved, the probability of cavitation of the hydraulic pump can be reduced, the hydraulic pump element is protected, and the service life of the hydraulic pump is prolonged. Since the chamber 14 stores only fluid, no gas, and no direct communication with the outside atmosphere, the hydraulic pump does not suck air regardless of the attitude of the device. When the hydraulic system is stopped, fluid can be supplemented into the device through the oil return opening 7 and also through the oil suction opening 8. If the compressed gas needs to be stored in the outer cavity 13, a check valve needs to be installed on the vent hole 4, so that the external high-pressure gas can be injected into the outer cavity 13, and the compressed gas in the outer cavity 13 cannot leak outwards. The pressure sensor 1 is used to monitor the pressure in the outer chamber 13, and if the inner chamber 14 is emptied, compressed gas is injected into the outer chamber 13, and the pressure sensor is recordedReading P of 10The prerecorded reading P can then be passed through during operation of the hydraulic system0And real-time readings of the pressure sensor 1 estimate the volume V of fluid stored in the chamber 14l：
Vl＝Vmax(1-P0/Pt)
In the above formula VmaxThe maximum volume of the outer chamber 13, i.e. the volume of the outer chamber 13 when the inner chamber 14 is emptied of all fluid.
Example 1
Fig. 2 shows an open hydraulic system with a valve-controlled hydraulic cylinder, in which the conventional hydraulic tank is replaced by the device according to the invention, the return oil of the hydraulic system being connected to the return opening 7 of the device, and the suction opening of the hydraulic pump being connected to the suction opening 8 of the device. The return oil of the hydraulic system enters the soft bag 5 of the device through an oil return port 7 for storage. At the same time, the hydraulic pump sucks the fluid from the soft bag 5, and the hydraulic pump can stably suck the fluid from the soft bag 5 because the soft bag 5 isolates the fluid from the outside air, so that the system swings and turns upside down regardless of the posture.
Example 2
Fig. 3 shows a closed hydraulic system, in which a hydraulic pump drives a hydraulic cylinder to extend or retract by bidirectional rotation. The device replaces the function of an oil supplementing pump and is used for supplementing oil to a closed hydraulic system. The oil return opening 7 of the device is blocked by a cap or a choke plug during working to prevent fluid leakage, a one-way valve is required to be arranged on the vent hole 4, a certain amount of compressed gas is injected into the outer cavity 13 through the one-way valve, the compressed gas forms certain pressure in the outer cavity 13, the pressure presses the fluid in the outer cavity to the oil suction opening 8 through the soft bag 5, and certain pressure is formed in the oil suction opening 8. When a certain amount of fluid is lost due to leakage in the closed hydraulic system during operation, so that the pressure in the hydraulic system pipeline is lower than the pressure in the oil suction opening 8, the fluid stored in the device breaks through the check valve in the closed hydraulic system and is replenished into the hydraulic system pipeline. The device replaces the oil replenishing pump in the closed hydraulic system, and has the advantages of simple structure, light weight and no energy consumption.
Example 3
Fig. 4 is an alternative to fig. 1, which differs from the previously described solution in that: the central pipeline 6 is a straight pipeline, and no partition plate 11 exists between the oil return opening 7 and the oil suction opening 8. In the original solution, the function of the partition 11 is to prolong the path of the fluid flowing from the oil return opening 7 to the oil intake opening 8, helping the fluid to precipitate the gas dissolved therein. However, if the hydraulic system is operated more slowly, the amount of gas dissolved in the fluid is less, or the device is used as a make-up oil, the partition 11 may not be present.
Claims (11)
1. A fluid storage and supplement device comprises a shell and is characterized in that a soft body bag is arranged in the shell, a central pipeline penetrates through the soft body bag, an oil return port and an oil suction port are respectively arranged at two ends of the central pipeline, which penetrate out of the soft body bag, an outer cavity is formed between the inner wall of the shell and the outer wall of the soft body bag, and an inner cavity is formed between the inner wall of the soft body bag and the outer wall of the central pipeline;
an oil inlet hole communicated with the inner cavity is formed in the central pipeline section left in the soft body bag and close to the oil return port, and an oil outlet hole communicated with the inner cavity is formed in the central pipeline section left in the soft body bag and close to the oil suction port.
2. The fluid storage and supply apparatus as claimed in claim 1, wherein a partition is disposed at a middle position in the central pipe, the inside of the central pipe is divided into two parts, namely, an oil return pipe and an oil outlet pipe, the outer end of the oil return pipe is an oil return opening, and the outer end of the oil outlet pipe is an oil suction opening.
3. The fluid storage replenishment device of claim 1, wherein said oil inlet is disposed in said oil return line;
the oil outlet hole is arranged on the oil outlet pipeline.
4. The fluid storage supplement of claim 1, wherein the outer wall of the central conduit is sealingly attached to the bladder.
5. The fluid storage supplement of claim 1, wherein said soft bladder is made of rubber.
6. The fluid storage supplement of claim 1, wherein the outer shell is sealingly connected to the outer wall of the central conduit.
7. The fluid storage supplemental device of claim 1, wherein said housing has a vent in communication with said outer chamber.
8. The fluid storage refill device as defined in claim 7, wherein a pressure sensor is mounted on said housing, a sensing end of said pressure sensor being in communication with said outer chamber.
9. An open hydraulic system, comprising a hydraulic pump, an oil return pipe, and the fluid storage and supplement device according to any one of claims 1 to 9, wherein an oil suction port of the fluid storage and supplement device is communicated with the hydraulic pump, and an oil return port of the fluid storage and supplement device is communicated with the oil return pipe.
10. A closed hydraulic system comprising a hydraulic pump and the fluid storage and supplement device as claimed in any one of claims 1 to 9, wherein one of the oil suction port and the oil return port of the fluid storage and supplement device is closed, the other one of the oil suction port and the oil return port is communicated with the hydraulic pump, and the vent hole is connected with a one-way valve.
11. A method of calculating a stored volume of fluid in real time using a fluid storage replenishment device, comprising:
an open hydraulic system as claimed in claim 9, wherein when the internal chamber is exhausted, compressed gas is injected into the external chamber and the reading of the pressure sensor at that time is recordedNumber P0When the hydraulic system is in operation, the pre-recorded reading P is passed0And real-time reading P of the pressure sensortCalculating the volume V of fluid stored in the inner cavityl：
Vl=Vmax(1-P0/Pt)，
In the above formula VmaxThe maximum volume of the outer chamber, i.e. the volume of the outer chamber when the inner chamber is emptied of all fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910474527.0A CN112012970A (en) | 2019-06-01 | 2019-06-01 | Fluid storage and supplement device and hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910474527.0A CN112012970A (en) | 2019-06-01 | 2019-06-01 | Fluid storage and supplement device and hydraulic system |
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| Publication Number | Publication Date |
|---|---|
| CN112012970A true CN112012970A (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910474527.0A Pending CN112012970A (en) | 2019-06-01 | 2019-06-01 | Fluid storage and supplement device and hydraulic system |
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| CN (1) | CN112012970A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153835A (en) * | 2021-03-08 | 2021-07-23 | 杭州电子科技大学 | Air recirculation system based on pericardial soft air supplement valve and working method thereof |
-
2019
- 2019-06-01 CN CN201910474527.0A patent/CN112012970A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153835A (en) * | 2021-03-08 | 2021-07-23 | 杭州电子科技大学 | Air recirculation system based on pericardial soft air supplement valve and working method thereof |
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Application publication date: 20201201 |