CN117823491A - Testing device and testing method for hydraulic buoyancy adjusting system - Google Patents
Testing device and testing method for hydraulic buoyancy adjusting system Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 118
- 239000003921 oil Substances 0.000 claims abstract description 384
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 74
- 230000001105 regulatory effect Effects 0.000 claims abstract description 38
- 238000004891 communication Methods 0.000 claims abstract description 18
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- 238000007906 compression Methods 0.000 claims abstract description 3
- 238000006073 displacement reaction Methods 0.000 claims description 28
- 238000002347 injection Methods 0.000 claims description 24
- 239000007924 injection Substances 0.000 claims description 24
- 238000007872 degassing Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 17
- 230000009471 action Effects 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 238000011282 treatment Methods 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 9
- 230000007547 defect Effects 0.000 description 5
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- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000013142 basic testing Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 230000000750 progressive effect Effects 0.000 description 1
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- 239000010729 system oil Substances 0.000 description 1
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Abstract
The invention belongs to the technical field of hydraulic system testing, and particularly relates to a testing device and a testing method for a hydraulic buoyancy adjusting system. The testing device comprises an oil cylinder, a main pipeline, an oil return unit, an oil discharge unit and a main control module; the inner cavity of the oil cylinder is divided into an air cavity and an oil cavity for containing hydraulic oil by a piston, a pre-compression spring is arranged in the air cavity, and a vacuum valve is connected outside the air cavity; one end of the main pipeline is used for being connected with the hydraulic buoyancy regulating system to be tested, and the other end of the main pipeline is communicated with an oil discharge cabin; the oil return unit comprises a gear pump and a motor thereof, an oil suction port of the gear pump is communicated with the oil cavity, and an oil outlet of the gear pump is communicated with the main pipeline; the oil discharge unit comprises an oil discharge pipe and an overflow valve arranged on the oil discharge cabin, one end of the oil discharge pipe is communicated with the oil cavity, and the other end of the oil discharge pipe is communicated with an overflow port of the overflow valve; the main control module is in communication connection with the motor, the overflow valve and the vacuum valve. The invention can realize the full-flow test of oil discharge and oil return of the hydraulic buoyancy regulating system.
Description
Technical Field
The invention belongs to the technical field of hydraulic system testing, and particularly relates to a testing device and a testing method for a hydraulic buoyancy adjusting system.
Background
The hydraulic buoyancy adjusting system is mainly applied to marine observation and detection equipment such as an underwater unmanned robot, a profile detection buoy, an underwater glider and the like, and is a main power source for the floating and the submergence of the marine observation and detection equipment. The stability and the power consumption performance of the hydraulic buoyancy regulating system influence the service life of equipment, and whether the observation and detection task can be successful or not is directly determined.
Taking a section detection buoy as an example, when the buoy is on the water surface, the working pressure of the hydraulic buoyancy regulating system is 0Mpa; when the buoy is at 6000 m water depth, the working pressure of the hydraulic buoyancy regulating system is 60Mpa; under different working pressures, the working efficiency of the hydraulic buoyancy regulating system is different, and the adopted low-power consumption strategies are also different, so that the key technical parameters of the hydraulic buoyancy regulating system are required to be tested under different pressures to evaluate the working reliability of the hydraulic buoyancy regulating system and formulate the most suitable low-power consumption strategy.
As shown in fig. 1, the most commonly used hydraulic buoyancy regulating system at present, other parts except the oil bag are integrated in the buoy cabin body; the hydraulic pump is adopted to drain the oil in the inner oil tank to the outer oil bag, so that the drainage volume is increased, and the buoyancy is increased to float upwards; by opening the oil return electromagnetic valve, under the action of external pressure, the hydraulic oil of the outer oil bag is extruded back to the inner oil tank, the drainage volume is reduced, and the submergence under buoyancy reduction is realized. The key technical parameters mainly comprise: oil discharge flow under different pressures and different hydraulic pump rotational speeds; oil discharge power consumption under different pressures and different hydraulic pump rotation speeds; oil return flow under different pressures and different switching frequencies of the oil return electromagnetic valve; oil return power consumption under different pressures and different switching frequencies of oil return electromagnetic valves.
In addition, when the hydraulic buoyancy regulating system is filled with hydraulic oil, air is inevitably mixed in, so that part of air is dissolved in the hydraulic oil; a large number of experiments prove that the air in the hydraulic oil is difficult to be removed completely by the traditional vacuumizing and standing mode; the air dissolved in the hydraulic oil can be released in the process of sudden pressure drop of the hydraulic oil, and the working stability of the hydraulic buoyancy regulating system is directly affected. Therefore, the hydraulic buoyancy regulating system testing device meeting engineering application requirements can generate a pressure drop link in addition to basic testing functions so as to efficiently remove air dissolved in hydraulic oil.
At present, the test devices of the commonly used hydraulic buoyancy adjusting system generally have the following two modes, and each mode has the following defects:
1) Adding a pressure regulating valve at the outlet of the buoyancy regulating system, and discharging oil by matching with a hydraulic pump to generate and regulate the back pressure of the system; however, only back pressure can be provided in the oil discharging process of the hydraulic pump, and once the oil return electromagnetic valve is opened, the back pressure of the system immediately disappears, the whole oil discharging and oil return circulation flow cannot be tested, and air dissolved in hydraulic oil cannot be removed; when key technical parameters are tested, a buoyancy adjusting system is required to be provided with a flowmeter or other flow detection means, so that the universality is poor;
2) The buoyancy regulating system is integrally filled into a pressure-resistant cabin, an inner oil tank is arranged in the pressure-resistant cabin, an outer oil bag is arranged outside the pressure-resistant cabin, the pressure-resistant cabin is arranged in a pressure kettle, and a backpressure testing environment is provided for the buoyancy regulating system through hydrostatic pressure in the pressure kettle; however, the whole testing process has large workload, a large amount of manpower and material resources are consumed for preparation work and test auxiliary work, and uncontrollable factors are too many; when key technical parameters are tested, a buoyancy adjusting system is required to be provided with a flowmeter or other flow detection means, so that the universality is poor; in addition, although the mode can remove air mixed in the hydraulic oil, the pressure-resistant cabin is required to be taken out of the pressure kettle, then the buoyancy regulating system is taken out of the pressure-resistant cabin, and then the air is exhausted, so that the whole process is time-consuming and labor-consuming, and the efficiency is extremely low.
Disclosure of Invention
Aiming at the defects existing in the related art, the invention provides a testing device and a testing method for a hydraulic buoyancy adjusting system, which aim to realize the full-flow test of oil discharge and oil return of the hydraulic buoyancy adjusting system and more conveniently and efficiently remove air dissolved in hydraulic oil.
The invention provides a testing device for a hydraulic buoyancy adjusting system, comprising:
the oil cylinder is an assembled sealing cylinder; a piston which moves back and forth along the axial direction of the oil cylinder is arranged in the inner cavity of the oil cylinder so as to divide the inner cavity of the oil cylinder into an oil cavity and an air cavity; the oil cavity is used for containing hydraulic oil; a pre-pressing spring is arranged in the air cavity along the axial direction of the oil cylinder, and the outer side of the air cavity is connected with a vacuum valve;
one end of the main pipeline is provided with a main interface, and the other end of the main pipeline is communicated with an oil discharge cabin; the main interface is used for being connected with a hydraulic buoyancy adjusting system to be measured;
the oil return unit comprises a gear pump and a motor; an oil suction port of the gear pump is communicated with the oil cavity, and an oil outlet of the gear pump is communicated with the main pipeline; the gear pump is connected with the motor so as to pump hydraulic oil in the oil cavity into an inner oil tank of the hydraulic buoyancy regulating system to be tested through the main pipeline under the drive of the motor;
the oil discharge unit comprises an oil discharge pipe and an overflow valve arranged on the oil discharge cabin; the inlet of the overflow valve is communicated with the oil discharge cabin; one end of the oil discharge pipe is communicated with the oil cavity, and the other end of the oil discharge pipe is connected to the oil discharge cabin and communicated with an overflow port of the overflow valve;
and the main control module is in communication connection with the motor, the overflow valve and the vacuum valve.
According to the technical scheme, the testing device can provide stable system pressure for the hydraulic buoyancy adjusting system to be tested, and then the full-flow testing of oil discharge and oil return of the hydraulic buoyancy adjusting system to be tested can be achieved.
In some embodiments, the test device further comprises an oil injection electromagnetic valve arranged on the oil discharge cabin, wherein an inlet of the oil injection electromagnetic valve is communicated with the oil discharge cabin, and an outlet of the oil injection electromagnetic valve is communicated with the oil cavity; the oiling solenoid valve is in communication connection with the main control module.
In some of these embodiments, the test device further comprises a displacement sensor and a pressure sensor; the displacement sensor is connected to the outside of the oil cylinder at the air cavity side, and a measuring rod of the displacement sensor passes through the air cavity and is connected with the piston so as to measure the displacement of the piston in real time; the pressure sensor is connected to the oil discharge cabin to measure the system pressure of the hydraulic buoyancy adjusting system to be measured in real time; the displacement sensor and the pressure sensor are both in communication connection with the main control module.
In some embodiments, the testing device further comprises a safety valve mounted on the oil discharge cabin, an inlet of the safety valve is communicated with the oil discharge cabin, and an outlet of the safety valve is communicated with the oil cavity; the safety valve is in communication connection with the main control module.
In some embodiments, the test device further comprises an exhaust unit, wherein the exhaust unit comprises a first air tap and a second air tap; the first air nozzle is connected to one side of the piston close to the air cavity, and the air inlet end of the first air nozzle is communicated with the oil cavity; the second air tap is connected to the outer side of the air cavity, the air inlet end of the second air tap is communicated with the air outlet end of the first air tap through a hose, and the air outlet end of the second air tap is communicated with the external environment.
In some embodiments, the outside of the air cavity is connected with a vacuum gauge to display the air pressure condition in the air cavity in real time; and the main pipeline is connected with a pressure gauge so as to display the system pressure condition of the hydraulic buoyancy regulating system to be measured in real time.
The invention also provides a testing method for the hydraulic buoyancy regulating system, which is carried out by adopting the testing device and comprises the following steps:
and (3) oil cylinder oiling: connecting the main interface to an external oil source, opening an oiling electromagnetic valve, and opening a vacuum valve to vacuumize the air cavity so as to drive the piston to move towards the air cavity side, so that hydraulic oil of the external oil source is pumped into the oil cavity; after the oil cylinder is filled with oil, closing an oil filling electromagnetic valve, removing an external oil source, and connecting a hydraulic buoyancy adjusting system to be measured after the outer oil bag is removed to a main interface;
parameter setting: the method comprises the steps that the system pressure P of a hydraulic buoyancy adjusting system to be measured, the rotating speed of a hydraulic pump and the switching frequency of an oil return electromagnetic valve are preset in a main control module; preset relief pressure P of relief valve y ，P y Is equal to a preset system pressure P; presetting an upper limit position and a lower limit position of a piston;
oiling the hydraulic buoyancy adjusting system to be tested: opening an oil return electromagnetic valve; starting a motor to drive a gear pump to pump hydraulic oil in an oil cavity into an inner oil tank of a hydraulic buoyancy adjusting system to be measured through a main pipeline until an overflow valve overflows, finishing oiling of the hydraulic buoyancy adjusting system to be measured, and closing the motor and an oil return electromagnetic valve;
and (3) oil discharge testing: starting a hydraulic pump to drain hydraulic oil in an inner oil tank into an oil cavity through an overflow valve so as to push a piston to move towards the air cavity side, and acquiring the oil drainage flow of a hydraulic buoyancy regulating system to be tested by using a displacement sensor; when the piston moves to a preset upper limit position, the hydraulic pump is closed, and oil discharge is stopped;
and (3) oil return testing: opening an oil return electromagnetic valve; starting a motor to drive a gear pump to pump hydraulic oil in an oil cavity into an inner oil tank through a main pipeline so as to enable a piston to move towards the oil cavity side, and acquiring oil return flow of a hydraulic buoyancy regulating system to be tested by using a displacement sensor; when the piston moves to a preset lower limit position, the motor and the oil return electromagnetic valve are closed, and oil return is stopped.
According to the technical scheme, the system pressure of the hydraulic buoyancy adjusting system to be tested is generated and ensured by the testing device, the testing device provides stable system pressure for the hydraulic buoyancy adjusting system to be tested, so that the full-flow testing of oil discharge and oil return of the hydraulic buoyancy adjusting system to be tested is realized, and the testing efficiency, testing convenience and universality are improved.
In some embodiments, in the oil discharge test step and the oil return test step, oil discharge flow and oil return flow of the hydraulic buoyancy adjusting system to be tested are calculated through the formula (1);
in the formula (1), Q is oil discharge flow or oil return flow of a hydraulic buoyancy regulating system to be tested; piston_V1 is the volume of hydraulic oil in the oil cylinder at the moment t1, piston_V2 is the volume of hydraulic oil in the oil cylinder at the moment t2, and the values of Piston_V1-Piston_V2 are calculated by using the sectional area of the oil cavity and the Piston displacement at the moment t1 to t 2; Δt is the time interval between t1 and t 2.
In some embodiments, in the parameter setting step, the method further includes presetting a relief valve opening pressure P in the main control module a And P is a >P y The method comprises the steps of carrying out a first treatment on the surface of the In the oil discharge test step, when the actual system pressure exceeds P a And when the safety valve is opened, the hydraulic oil in the oil discharge cabin is discharged into the oil cavity through the safety valve.
In some embodiments, in the parameter setting step, the method further includes presetting a degassing pressure P in the main control module q And P is q <P y The method comprises the steps of carrying out a first treatment on the surface of the The testing method further comprises a hydraulic oil degassing step, wherein the hydraulic oil degassing step specifically comprises the following steps:
opening an oiling electromagnetic valve; starting a hydraulic pump to discharge hydraulic oil in an inner oil tank into an oil cavity through an oil injection electromagnetic valve; when the actual system pressure reaches the preset degassing pressure P q When the hydraulic oil is injected into the oil cavity, the oil injection electromagnetic valve is opened and closed at high frequency, so that the hydraulic oil flows into the oil cavity through a pore canal in the oil injection electromagnetic valve rapidly under the action of pressure difference, and then dissolved air in the hydraulic oil is separated out; the separated air is accumulated at the bottom of the piston;
and closing the vacuum valve to enable the air cavity to be communicated with the external environment to be in a normal pressure state, and discharging the separated air to the external environment through the exhaust unit under the action of the downward pressure of the pre-compression spring.
According to the technical scheme, high-pressure degassing of hydraulic oil is achieved, and the hydraulic buoyancy adjusting system to be tested is not required to be placed in the pressure kettle for degassing, so that degassing efficiency and operation convenience are improved.
Based on the technical scheme, the testing device and the testing method for the hydraulic buoyancy adjusting system can solve the defects of the conventional testing device and testing method, realize the full-flow testing of oil discharge and oil return of the hydraulic buoyancy adjusting system to be tested, and can more conveniently and efficiently remove the dissolved air in the hydraulic oil.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a schematic diagram of a hydraulic buoyancy adjustment system most commonly used at present;
FIG. 2 is a schematic diagram of the assembly of the test device for a hydraulic buoyancy adjustment system according to the present invention;
FIG. 3 is a bottom view of a testing device for a hydraulic buoyancy adjustment system according to the present invention (the mounting base and support bar are not shown);
FIG. 4 is a schematic diagram of the connection of a test device for a hydraulic buoyancy adjustment system of the present invention to a hydraulic buoyancy adjustment system to be tested;
FIG. 5 is a flow chart of a test method for a hydraulic buoyancy adjustment system of the present invention.
In the figure: 10. an oil drum; 11. an oil chamber; 12. an air cavity; 13. a fixing seat; 14. a support rod; 15. an oil return joint; 16. an oil discharge joint; 17. a pressure regulating joint; 18. oiling joint; 19. an exhaust port; 20. a piston; 21. a seal ring; 22. pre-pressing a spring; 23. a vacuum valve; 24. a vacuum gauge; 25. a first air tap; 26. a second air tap; 27. a hose; 28. a displacement sensor; 29. a measuring rod; 30. a main pipe; 31. a main interface; 32. an oil discharge cabin; 33. an oil return pipe; 34. a gear pump; 35. a motor; 36. a coupling; 37. an oil drain pipe; 38. an overflow valve; 39. a safety valve; 40. an oil injection electromagnetic valve; 41. a pressure sensor; 42. a pressure gauge; 43. and a main control module.
Detailed Description
The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center," "lateral," "longitudinal," "upper," "lower," "top," "bottom," "inner," "outer," "front," "rear," "vertical," "horizontal," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the invention.
The terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 2-4, the invention provides a testing device for a hydraulic buoyancy adjusting system, which is used for testing key technical parameters and the like of the hydraulic buoyancy adjusting system to be tested. The testing device comprises an oil drum 10, a main pipeline 30, an oil return unit, an oil discharge unit, a main control module 43, a fixing seat 13 and the like.
The oil drum 10 is an assembled sealed drum. A piston 20 which moves back and forth along the axial direction of the oil drum 10 is arranged in the inner cavity of the oil drum 10; it can be appreciated that the piston 20 is in dynamic sealing connection with the side wall of the inner cavity of the oil cylinder 10 through the sealing ring 21. The inner cavity of the oil cylinder 10 is divided into an oil cavity 11 and an air cavity 12 by the arrangement of the piston 20. The oil chamber 11 is for containing hydraulic oil. A pre-pressing spring 22 is arranged in the air cavity 12 along the axial direction of the oil cylinder 10, and a vacuum valve 23 is connected with the outer side of the air cavity 12. It will be appreciated that when the vacuum valve 23 is opened, the air chamber 12 is vacuumized, so that the air chamber 12 is in a vacuum state; when the vacuum valve 23 is closed, the air chamber 12 is communicated with the external environment to be in a normal pressure state; namely, the vacuum valve 23 is arranged to switch the vacuum state of the air cavity 12 from the normal pressure state.
One end of the main pipe 30 is provided with a main interface 31, and the other end is communicated with an oil discharge cabin 32. The main interface 31 is used for connecting with a hydraulic buoyancy adjusting system to be measured. It will be appreciated that when the main conduit 30 is connected to the hydraulic buoyancy adjustment system to be tested, the pressure within the main conduit 30 and within the drain chamber 32 will both be consistent with the system pressure of the hydraulic buoyancy adjustment system to be tested.
The oil return unit includes a gear pump 34 and a motor 35. An oil suction port of the gear pump 34 is communicated with the oil cavity 11 through an oil return joint 15; the oil outlet of the gear pump 34 is communicated with the main pipeline 30 through an oil return pipe 33. The gear pump 34 is connected with a motor 35 through a coupling 36, and the motor 35 provides driving power for the gear pump 34. The gear pump 34 can be driven by the motor 35 to pump the hydraulic oil in the oil cavity 11 into an inner oil tank of the hydraulic buoyancy adjusting system to be measured after sequentially flowing through the oil return pipe 33 and the main pipe 30; because the main pipe 30 communicates with the oil discharge chamber 32, hydraulic oil also enters the oil discharge chamber 32. It will be appreciated that the gear pump 34 pressurizes the hydraulic oil flowing out of the oil chamber 11; a check valve is provided in the gear pump 34 to prevent the backflow of hydraulic oil.
The drain unit includes a drain pipe 37 and a relief valve 38 mounted to the sump 32. The inlet of the relief valve 38 communicates with the sump 32. One end of the oil drain pipe 37 is communicated with the oil cavity 11 through an oil drain joint 16, and the other end of the oil drain pipe 37 is connected to the oil drain chamber 32 and is communicated with an overflow port of an overflow valve 38. The overflow valve 38 is arranged to control the on-off between the oil drain pipe 37 and the oil drain cabin 32; specifically, when the pressure in the oil discharge chamber 32 is smaller than the relief pressure of the relief valve 38, the relief valve 38 is in a closed state, and the oil discharge pipe 37 is not communicated with the oil discharge chamber 32; when the pressure in the oil discharge chamber 32 reaches the relief pressure of the relief valve 38, the relief valve 38 acts to open the relief port, so that the oil discharge pipe 37 communicates with the oil discharge chamber 32, and the hydraulic oil in the oil discharge chamber 32 enters the oil chamber 11 of the oil cylinder 10 through the relief valve 38. It should be noted that, the relief pressure of the relief valve 38 should be set to be consistent with the preset system pressure of the hydraulic buoyancy adjusting system to be tested, so that when the relief valve 38 overflows, the actual system pressure of the hydraulic buoyancy adjusting system to be tested reaches the preset system pressure, and the system pressure is stabilized by the overflow of the relief valve 38.
The main control module 43 is in communication connection with the motor 35, the overflow valve 38 and the vacuum valve 23 to control the actuation of the motor 35, the overflow valve 38 and the vacuum valve 23 respectively.
The fixing seat 13 is connected to the outside of the oil cylinder 10 near one side of the oil cavity 11 through a plurality of supporting rods 14, and the fixing seat 13 provides support for the whole set of testing device. An external space is formed between the fixing seat 13 and the oil cylinder 10, and an oil return unit, an oil discharge unit, a main control module 43 and the like can be arranged in the external space and mounted on the support rod 14 or the base.
Further, when the testing device is used for oil discharge testing of the hydraulic buoyancy adjusting system to be tested, the hydraulic pump of the hydraulic buoyancy adjusting system to be tested is started, hydraulic oil in the inner oil tank is discharged outwards and is discharged into the main pipeline 30 and the oil discharge cabin 32, the system pressure is continuously increased, namely, the pressure in the oil discharge cabin 32 is continuously increased, after the pressure reaches the overflow pressure of the overflow valve 38, the overflow valve 38 is opened, and the hydraulic oil enters the oil cavity 11 of the oil drum 10 through the overflow valve 38, so that the system pressure is stabilized, and further, the oil discharge performance testing of the hydraulic buoyancy adjusting system to be tested can be performed. When the testing device is used for carrying out oil return testing of the hydraulic buoyancy regulating system to be tested, the gear pump 34 is started, hydraulic oil in the oil cavity 11 of the oil cylinder 10 is pumped into an inner oil tank of the hydraulic buoyancy regulating system to be tested through the main pipeline 30, and system pressure is provided for the hydraulic buoyancy regulating system to be tested, so that the problem that the existing testing device cannot provide system back pressure or needs to be additionally provided with a pressure-resistant cabin and a pressure kettle when carrying out oil return testing is solved, and further oil return performance testing of the hydraulic buoyancy regulating system to be tested can be carried out.
The above-mentioned exemplary embodiment has solved the shortcoming of present commonly used testing arrangement, makes testing arrangement can provide stable system pressure for the hydraulic buoyancy governing system that awaits measuring, and then can realize the full flow test of the hydraulic buoyancy governing system oil extraction that awaits measuring and return oil.
Referring to fig. 2-4, in some embodiments, the testing device further includes an oil injection solenoid valve 40 mounted on the oil sump 32; the inlet of the oil injection solenoid valve 40 is communicated with the oil discharge cabin 32, and the outlet of the oil injection solenoid valve 40 is communicated with the oil cavity 11 through an oil injection joint 18. The oiling solenoid valve 40 is in communication connection with a main control module 43, and the main control module 43 controls the actuation of the oiling solenoid valve 40. In the exemplary embodiment, the oil chamber 11 of the oil cylinder 10 can be initially filled with oil by the arrangement of the oil filling electromagnetic valve 40; specifically, the main port 31 on the main pipe 30 is connected with an external oil source, the oil injection electromagnetic valve 40 is opened, the vacuum valve 23 is opened to vacuumize the air cavity 12, so as to drive the piston 20 to move towards the air cavity 12, and hydraulic oil of the external oil source is pumped into the oil cavity 11 after flowing through the main pipe 30, the oil discharge cabin 32 and the oil injection electromagnetic valve 40 in sequence.
Referring to fig. 2-4, in some embodiments, the testing device further includes a displacement sensor 28 and a pressure sensor 41. The displacement sensor 28 is connected to the outside of the oil drum 10 at the air cavity 12 side, and a measuring rod 29 of the displacement sensor 28 passes through the air cavity 12 and is connected with the piston 20; when the piston 20 moves, the measuring rod 29 is driven to synchronously move, so that the displacement of the piston 20 can be measured in real time through the arrangement of the displacement sensor 28, and further, the flow detection can be realized; further, by means of the displacement sensor 28, the problem that the existing testing device needs a self-matched flow detection means of the hydraulic buoyancy adjusting system to be tested is solved, and the universality of the testing device is improved. The pressure sensor 41 is connected to the oil discharge chamber 32 to measure the system pressure of the hydraulic buoyancy adjusting system to be measured in real time. The displacement sensor 28 and the pressure sensor 41 are both in communication connection with the main control module 43 to transmit measurement information into the main control module 43 in real time.
Referring to fig. 2 and 4, in some embodiments, the testing device further includes a safety valve 39 mounted on the sump 32; the inlet of the safety valve 39 is communicated with the oil discharge cabin 32, and the outlet of the safety valve 39 is communicated with the oil cavity 11 through a pressure regulating joint 17. Further, the opening pressure of the relief valve 39 should be set to be greater than the relief pressure of the relief valve 38, that is, greater than the system pressure preset by the hydraulic buoyancy adjustment system to be measured; when the actual system pressure of the hydraulic buoyancy adjusting system to be tested exceeds the opening pressure of the safety valve 39, the safety valve 39 is opened, so that the hydraulic oil in the oil discharge cabin 32 also enters the oil cavity 11 of the oil drum 10 through the safety valve 39, and the safety of the testing device and the hydraulic buoyancy adjusting system to be tested is ensured. The safety valve 39 is in communication with a main control module 43, the main control module 43 controlling the actuation of the safety valve 39.
Referring to fig. 2 and 4, in some embodiments, the testing device further includes a gas discharge unit, and the gas discharge unit includes a first gas tap 25 and a second gas tap 26. The first air tap 25 is connected to one side of the piston 20 near the air cavity 12, and an air inlet end of the first air tap 25 is communicated with the oil cavity 11 through an air outlet 19 formed in the piston 20. The second air tap 26 is connected to the outside of the air cavity 12, and the air inlet end of the second air tap 26 is communicated with the air outlet end of the first air tap 25 through a hose 27, and the air outlet end of the second air tap 26 is communicated with the external environment. Further, the air in the oil chamber 11 may collect at the bottom of the piston 20, and the bottom of the piston 20 may be formed in a tapered shape toward the exhaust port 19; when the air accumulated at the bottom of the piston 20 is to be discharged, the vacuum valve 23 is opened to adjust the air chamber 12 to a normal pressure state, and the inside of the oil chamber 11 is positive pressure under the action of the pressing spring 22, so that the air is discharged from the air outlet 19 on the piston 20 to the external environment through the first air tap 25, the hose 27 and the second air tap 26 in sequence.
Referring to fig. 2 and 4, in some embodiments, a vacuum gauge 24 is coupled to the outside of the air chamber 12 to show the air pressure within the air chamber 12 in real time. A pressure gauge 42 is connected to the main pipe 30 to display the system pressure of the hydraulic buoyancy adjustment system to be measured in real time.
Referring to fig. 2-5, the present invention further provides a testing method for a hydraulic buoyancy adjusting system, which is performed by using the testing device, and includes the following steps:
oiling the oil drum 10: connecting the main interface 31 to an external oil source, opening the oiling electromagnetic valve 40, opening the vacuum valve 23 to vacuumize the air cavity 12 so as to drive the piston 20 to move towards the air cavity 12 side, and further enabling hydraulic oil of the external oil source to flow through the main pipeline 30, the oil discharge cabin 32 and the oiling electromagnetic valve 40 in sequence and then be sucked into the oil cavity 11; after the oil cylinder 10 is filled with oil, the oil filling electromagnetic valve 40 is closed, an external oil source is removed, and the hydraulic buoyancy adjusting system to be measured after the outer oil bag is removed is connected to the main interface 31. Further, the air chamber 12 is in a vacuum state, the pre-pressing spring 22 has insufficient elasticity to counteract the pressure difference between the vacuum and the atmospheric pressure, the oil chamber 11 is also in a negative pressure state, and a part of air mixed in the hydraulic oil in the oil chamber 11 can be separated out at the moment, so that the primary treatment effect is achieved.
Parameter setting: the system pressure P, the rotating speed of the hydraulic pump and the switching frequency of an oil return electromagnetic valve of the hydraulic buoyancy adjusting system to be measured are preset in the main control module 43; relief pressure P of preset relief valve 38 y ，P y Is equal to a preset system pressure P; the upper and lower limit positions of the piston 20 are preset.
Oiling the hydraulic buoyancy adjusting system to be tested: opening an oil return electromagnetic valve; starting the motor 35 to drive the gear pump 34 to pump the hydraulic oil in the oil cavity 11 into the inner oil tank of the hydraulic buoyancy adjusting system to be measured after sequentially flowing through the oil return pipe 33 and the main pipe 30, and continuously increasing the system pressure of the hydraulic buoyancy adjusting system to be measured along with the increase of the oil quantity, and increasing the pressure in the main pipe 30 and the oil discharge cabin 32 along with the increase of the system pressure until the pressure reaches the overflow pressure P of the overflow valve 38 y After that, the relief valve 38 is opened and overflows, and the excessive hydraulic oil flows through the relief valve 38 and the oil drain pipe 37 and then enters the oil chamber 11, so thatWhen the system pressure is stabilized to the preset system pressure P, the oiling of the hydraulic buoyancy adjusting system to be tested is completed, and the motor 35 and the oil return electromagnetic valve are closed; at this time, the preparation work before the test is completed, and the subsequent test steps can be performed.
And (3) oil discharge testing: the hydraulic pump is started to discharge the hydraulic oil in the inner tank to the outside, and the hydraulic oil is discharged into the main pipe 30 and the oil discharge chamber 32, the system pressure is continuously increased, that is, the pressure in the oil discharge chamber 32 is continuously increased, after the pressure reaches the overflow pressure of the overflow valve 38, the overflow valve 38 is opened and overflows, and the hydraulic oil sequentially flows through the overflow valve 38 and the oil discharge pipe 37 and then enters the oil chamber 11 of the oil cylinder 10, thereby stabilizing the system pressure. Because the oil of the hydraulic buoyancy adjusting system to be measured is discharged, the piston 20 is pushed to move towards the air cavity 12 side continuously, and the position of the piston 20 is collected continuously by the displacement sensor 28 so as to obtain the oil discharge flow of the hydraulic buoyancy adjusting system to be measured; meanwhile, the main control module 43 reads the current and the voltage of the hydraulic buoyancy adjusting system to be measured during oil discharge test, so that the oil discharge power consumption of the hydraulic buoyancy adjusting system to be measured can be calculated; when the piston 20 moves to the preset upper limit position, the hydraulic pump is turned off, and the oil discharge is stopped.
And (3) oil return testing: opening an oil return electromagnetic valve; starting a motor 35 to drive a gear pump 34 to pump hydraulic oil in an oil cavity 11 into an inner oil tank through a main pipeline 30 so as to enable a piston 20 to continuously move towards the oil cavity 11 side, and continuously collecting the position of the piston 20 by utilizing a displacement sensor 28 so as to obtain the return oil flow of a hydraulic buoyancy regulating system to be tested; meanwhile, the main control module 43 reads the current and the voltage of the hydraulic buoyancy adjusting system to be tested in the oil return test, so that the oil return power consumption of the hydraulic buoyancy adjusting system to be tested can be calculated; when the piston 20 moves to the preset lower limit position, the motor 35 and the oil return solenoid valve are closed, and oil return is stopped.
Further, the preset system pressure P, the rotation speed of the hydraulic pump and the set value of the switching frequency of the oil return solenoid valve of the hydraulic buoyancy adjusting system to be tested in the main control module 43 are adjusted, the hydraulic pump is started again to perform oil discharge test, and after the oil discharge test is completed, the oil return solenoid valve and the motor 35 are opened again to perform oil return test, so that the oil discharge flow and the oil discharge power consumption under different pressures and different rotation speeds of the hydraulic pump can be tested, and the oil return flow and the oil return power consumption under different switching frequencies of the oil return solenoid valve can be tested.
According to the above-mentioned exemplary embodiment, the testing device is connected with the hydraulic buoyancy adjusting system to be tested, so that the system pressure of the hydraulic buoyancy adjusting system to be tested is generated and ensured by the testing device, the testing device provides stable system pressure for the hydraulic buoyancy adjusting system to be tested, and further the full-flow testing of oil discharge and oil return of the hydraulic buoyancy adjusting system to be tested is realized, so that the defects of the conventional testing method are overcome, the hydraulic buoyancy adjusting system to be tested is not required to be placed in the pressure kettle for testing, and the testing efficiency and the testing convenience are remarkably improved; moreover, the testing method can realize the performance test of the hydraulic buoyancy regulating system to be tested under different pressures, different hydraulic pump rotating speeds and different oil return electromagnetic valve switching frequencies, and can be adapted to different hydraulic buoyancy regulating systems to be tested, so that the testing device and the testing method have good universality.
In some embodiments, in both the oil discharge test step and the oil return test step, the displacement sensor 28 is used to continuously collect the position of the piston 20, and the oil discharge flow and the oil return flow of the hydraulic buoyancy adjustment system to be tested are calculated through formula (1);
in the formula (1), Q is oil discharge flow or oil return flow of a hydraulic buoyancy regulating system to be tested; piston_V1 is the volume of hydraulic oil in the oil cylinder 10 at the time t1, piston_V2 is the volume of hydraulic oil in the oil cylinder 10 at the time t2, and the value of Piston_V1-Piston_V2 is calculated by using the sectional area of the oil cavity 11 and the displacement of the Piston 20 at the time t1 to t 2; Δt is the time interval between t1 and t 2.
In some embodiments, in the parameter setting step, the method further includes presetting the opening pressure P of the safety valve 39 in the main control module 43 a And P is a >P y I.e. the opening pressure of the relief valve 39 is greater than the relief pressure of the relief valve 38. In the oil discharge test step, when the actual system pressure of the hydraulic buoyancy adjusting system to be tested exceeds the opening pressure P of the relief valve 39 a When the hydraulic buoyancy adjusting system is in use, the safety valve 39 is opened, so that the hydraulic oil in the oil discharge cabin 32 is discharged into the oil cavity 11 through the safety valve 39, and the safety of the testing device and the hydraulic buoyancy adjusting system to be tested is ensured.
Referring to fig. 2-5, in some embodiments, in the parameter setting step, the method further includes presetting the degassing pressure P in the main control module 43 q And P is q <P y I.e. the degassing pressure is smaller than the relief pressure of the relief valve 38. The testing method further comprises a hydraulic oil degassing step, wherein the hydraulic oil degassing step specifically comprises the following steps:
opening the oil injection solenoid valve 40; starting the hydraulic pump to discharge the hydraulic oil in the inner oil tank outwards, so that the hydraulic oil in the inner oil tank flows through the main pipeline 30, the oil discharge cabin 32 and the oil injection electromagnetic valve 40 in sequence and is discharged into the oil cavity 11; in the process, the system pressure is continuously increased, so that the pressure difference between the oil discharge cabin 32 and the oil cavity 11 is also increased; when the actual system pressure reaches the preset degassing pressure P q When the oil injection solenoid valve 40 is opened and closed at a high frequency, so that hydraulic oil flows into the oil cavity 11 through a pore canal in the oil injection solenoid valve 40 rapidly under the action of a large pressure difference, and thus the dissolved air in the hydraulic oil is separated out as much as possible, and specifically, the switching frequency of the oil injection solenoid valve 40 can be set to be 100Hz-200Hz; proved by a large number of engineering practices, the degassing efficiency under the large pressure difference is obviously higher than that of the traditional vacuum standing; air precipitated in the hydraulic oil in the oil chamber 11 is accumulated at the bottom of the piston 20;
closing the vacuum valve 23 to allow the air chamber 12 to communicate with the external environment to be in a normal pressure state; under the action of the pressing spring 22, the oil chamber 11 is at a positive pressure, so that the precipitated air is discharged to the external environment through the exhaust unit, that is, the precipitated air is discharged to the external environment through the exhaust port 19 of the piston 20, the first air tap 25, the hose 27 and the second air tap 26 in sequence.
The above-mentioned exemplary embodiment has realized the high pressure degasification to hydraulic oil, and does not need to wait for the hydraulic buoyancy governing system of measuring to put into the autoclave and carry out the degasification to show and improve degassing efficiency and operating convenience from this.
In summary, the testing device and the testing method for the hydraulic buoyancy adjusting system solve the defects of the conventional testing device and testing method, and the testing device provides stable system pressure for the hydraulic buoyancy adjusting system to be tested, so that the full-flow testing of oil discharge and oil return of the hydraulic buoyancy adjusting system to be tested is realized, the air dissolved in the hydraulic oil can be removed more conveniently and efficiently, and the testing efficiency and the testing convenience are remarkably improved.
Finally, it should be noted that: in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (10)
1. A test device for a hydraulic buoyancy adjustment system, comprising:
the oil cylinder is an assembled sealing cylinder; a piston which moves back and forth along the axial direction of the oil cylinder is arranged in the inner cavity of the oil cylinder so as to divide the inner cavity of the oil cylinder into an oil cavity and an air cavity; the oil cavity is used for containing hydraulic oil; a pre-pressing spring is arranged in the air cavity along the axial direction of the oil cylinder, and the outer side of the air cavity is connected with a vacuum valve;
one end of the main pipeline is provided with a main interface, and the other end of the main pipeline is communicated with an oil discharge cabin; the main interface is used for being connected with a hydraulic buoyancy adjusting system to be measured;
the oil return unit comprises a gear pump and a motor; an oil suction port of the gear pump is communicated with the oil cavity, and an oil outlet of the gear pump is communicated with the main pipeline; the gear pump is connected with the motor so as to pump hydraulic oil in the oil cavity into an inner oil tank of the hydraulic buoyancy adjusting system to be measured through the main pipeline under the drive of the motor;
the oil discharge unit comprises an oil discharge pipe and an overflow valve arranged on the oil discharge cabin; an inlet of the overflow valve is communicated with the oil discharge cabin; one end of the oil drain pipe is communicated with the oil cavity, and the other end of the oil drain pipe is connected to the oil drain cabin and is communicated with an overflow port of the overflow valve;
and the main control module is in communication connection with the motor, the overflow valve and the vacuum valve.
2. The test device of claim 1, further comprising an oil injection solenoid valve mounted to the oil discharge compartment, an inlet of the oil injection solenoid valve being in communication with the oil discharge compartment, an outlet of the oil injection solenoid valve being in communication with the oil chamber; the oiling solenoid valve is in communication connection with the main control module.
3. The test device of claim 2, further comprising a displacement sensor and a pressure sensor; the displacement sensor is connected to the outside of the oil cylinder at the air cavity side, and a measuring rod of the displacement sensor passes through the air cavity and is connected with the piston so as to measure the displacement of the piston in real time; the pressure sensor is connected to the oil discharge cabin to measure the system pressure of the hydraulic buoyancy regulating system to be measured in real time; and the displacement sensor and the pressure sensor are both in communication connection with the main control module.
4. A test device according to claim 3, further comprising a safety valve mounted on the oil discharge compartment, an inlet of the safety valve being in communication with the oil discharge compartment, an outlet of the safety valve being in communication with the oil chamber; the safety valve is in communication connection with the main control module.
5. The test device of claim 4, further comprising an exhaust unit comprising a first air tap and a second air tap; the first air nozzle is connected to one side of the piston close to the air cavity, and the air inlet end of the first air nozzle is communicated with the oil cavity; the second air tap is connected to the outer side of the air cavity, the air inlet end of the second air tap is communicated with the air outlet end of the first air tap through a hose, and the air outlet end of the second air tap is communicated with the external environment.
6. The test device of claim 1, wherein a vacuum gauge is connected to the outside of the air cavity to display the air pressure in the air cavity in real time; and the main pipeline is connected with a pressure gauge so as to display the system pressure condition of the hydraulic buoyancy regulating system to be tested in real time.
7. A testing method for a hydraulic buoyancy adjustment system, using the testing device of claim 5, comprising the steps of:
and (3) oil cylinder oiling: connecting the main interface to an external oil source, opening an oiling electromagnetic valve, and opening a vacuum valve to vacuumize the air cavity so as to drive the piston to move towards the air cavity side, so that hydraulic oil of the external oil source is pumped into the oil cavity; after the oil cylinder is filled with oil, closing an oil filling electromagnetic valve, removing an external oil source, and connecting a hydraulic buoyancy adjusting system to be measured after the outer oil bag is removed to a main interface;
parameter setting: the method comprises the steps that the system pressure P of a hydraulic buoyancy adjusting system to be measured, the rotating speed of a hydraulic pump and the switching frequency of an oil return electromagnetic valve are preset in a main control module; preset relief pressure P of relief valve y ，P y Is equal to a preset system pressure P; presetting an upper limit position and a lower limit position of a piston;
oiling the hydraulic buoyancy adjusting system to be tested: opening an oil return electromagnetic valve; starting a motor to drive a gear pump to pump hydraulic oil in an oil cavity into an inner oil tank of a hydraulic buoyancy adjusting system to be measured through a main pipeline until an overflow valve overflows, finishing oiling of the hydraulic buoyancy adjusting system to be measured, and closing the motor and an oil return electromagnetic valve;
and (3) oil discharge testing: starting a hydraulic pump to drain hydraulic oil in an inner oil tank into an oil cavity through an overflow valve so as to push a piston to move towards the air cavity side, and acquiring the oil drainage flow of a hydraulic buoyancy regulating system to be tested by using a displacement sensor; when the piston moves to a preset upper limit position, the hydraulic pump is closed, and oil discharge is stopped;
and (3) oil return testing: opening an oil return electromagnetic valve; starting a motor to drive a gear pump to pump hydraulic oil in an oil cavity into an inner oil tank through a main pipeline so as to enable a piston to move towards the oil cavity side, and acquiring oil return flow of a hydraulic buoyancy regulating system to be tested by using a displacement sensor; when the piston moves to a preset lower limit position, the motor and the oil return electromagnetic valve are closed, and oil return is stopped.
8. The test method according to claim 7, wherein in the oil discharge test step and the oil return test step, an oil discharge flow rate and an oil return flow rate of the hydraulic buoyancy adjustment system to be tested are calculated by the formula (1);
in the formula (1), Q is oil discharge flow or oil return flow of a hydraulic buoyancy regulating system to be tested; piston_V1 is the volume of hydraulic oil in the oil cylinder at the moment t1, piston_V2 is the volume of hydraulic oil in the oil cylinder at the moment t2, and the values of Piston_V1-Piston_V2 are calculated by using the sectional area of the oil cavity and the Piston displacement at the moment t1 to t 2; Δt is the time interval between t1 and t 2.
9. The method according to claim 7, further comprising, in the parameter setting step, presetting a relief valve opening pressure P in the main control module a And P is a >P y The method comprises the steps of carrying out a first treatment on the surface of the In the oil discharge test step, when the actual system pressure exceeds P a And when the safety valve is opened, the hydraulic oil in the oil discharge cabin is discharged into the oil cavity through the safety valve.
10. The method according to claim 7, further comprising, in the parameter setting step, presetting a degassing pressure P in the main control module q And P is q <P y The method comprises the steps of carrying out a first treatment on the surface of the The test method further comprises a hydraulic oil degassing step, wherein the hydraulic oil degassing step specifically comprises the following steps:
opening an oiling electromagnetic valve; starting a hydraulic pump to discharge hydraulic oil in an inner oil tank into an oil cavity through an oil injection electromagnetic valve; when the actual system pressure reaches the preset degassing pressure P q When the hydraulic oil is injected into the oil cavity, the oil injection electromagnetic valve is opened and closed at high frequency, so that the hydraulic oil flows into the oil cavity through a pore canal in the oil injection electromagnetic valve rapidly under the action of pressure difference, and then dissolved air in the hydraulic oil is separated out; the separated air is accumulated at the bottom of the piston;
and closing the vacuum valve to enable the air cavity to be communicated with the external environment to be in a normal pressure state, and discharging the separated air to the external environment through the exhaust unit under the action of the downward pressure of the pre-compression spring.
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| CN202311718937.8A CN117823491B (en) | 2023-12-14 | Testing device and testing method for hydraulic buoyancy adjusting system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311718937.8A CN117823491B (en) | 2023-12-14 | Testing device and testing method for hydraulic buoyancy adjusting system |
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