CN210375734U - High-pressure environment simulation test bed for detecting buoy buoyancy adjusting system - Google Patents
High-pressure environment simulation test bed for detecting buoy buoyancy adjusting system Download PDFInfo
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- CN210375734U CN210375734U CN201921230496.6U CN201921230496U CN210375734U CN 210375734 U CN210375734 U CN 210375734U CN 201921230496 U CN201921230496 U CN 201921230496U CN 210375734 U CN210375734 U CN 210375734U
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Abstract
A high-pressure environment simulation test bed for detecting a buoy buoyancy adjusting system comprises a pump source, a valve control cylinder hydraulic unit, a control unit and a cooling unit; wherein: the pump source comprises a constant-pressure variable pump which is used for providing a constant-pressure source; the valve control cylinder hydraulic unit comprises a servo valve and an asymmetric hydraulic cylinder; the servo valve is a core element of pressure simulation closed-loop control and is used for receiving the instruction of the control unit and adjusting the size of the valve core opening, so that the pressure simulation closed-loop control is realized based on the difference value between the instruction pressure curve and the actual pressure; the asymmetric hydraulic cylinder comprises a rodless cavity and a rod cavity, wherein the rodless cavity is connected with the servo valve, and the rod cavity is connected with the buoy buoyancy adjusting system to be detected. The utility model discloses can simulate the sea water pressure that the oil pocket of self-sustaining section buoy when oil extraction and oil return received, under different pressures, the speed of buoy oil extraction and oil return has characteristics such as the principle is simple, safe and reliable, practice thrift the cost.
Description
Technical Field
The utility model relates to a buoyancy governing system pressure environment simulation field, concretely relates to detect buoy buoyancy governing system's high pressure environment simulation test platform.
Background
In the big data era, ocean data occupies a very important position for national defense safety. Ocean big data is an application science of big data technology in the ocean field, and Argo buoy technology is a new product marker in scientific practice. The self-sustaining section buoy is a measuring instrument which can drift freely in the sea, automatically measure the temperature, conductivity (salinity) and pressure of the sea water from the sea surface to a certain water depth by adopting a Lagrange circulation method, and track the drifting track of the sea water to obtain the speed and direction of the sea current.
At present, the self-supporting section buoy usually adopts an oil sac type buoyancy regulating system, and the buoyancy regulation can be realized by changing the volume of the self-supporting section buoy under the condition of unchanged weight. High-pressure oil is discharged to the outer oil bag through the buoy system to achieve buoyancy adjustment. The 4000-meter self-supporting section buoy can reach 40Mpa under the 4000-meter pressure in deep sea, and in order to verify that the system can stably operate for a long time, the buoyancy is required to be adjusted to pass through oil discharge and oil return detection under the pressure of 0-40Mpa, and the oil discharge operation reliability of a hydraulic system is verified.
The high-pressure environment simulation test bed plays a vital role in simulating the high pressure of deep sea water as a key experimental device, can be used for simulating the sea water pressure borne by an oil bag for oil discharge and oil return in the process of rising and falling of the buoy in the deep sea, can track a specified pressure depth curve, and can test the performance of the buoy buoyancy regulating system. And meanwhile, testing the reliability of oil return program control, and measuring the oil discharge and oil return rates under different pressures. On the other hand, a large amount of financial resources and material resources can be saved.
At present, the test bench that can carry out high pressure simulation to buoy buoyancy governing system is few, and the relation of simulation pressure and degree of depth can't be controlled accurately to current analog system moreover, and the mode simulation cost with the hyperbaric chamber is expensive and more complicated, can't trial and error. Therefore, the design of a buoy high-pressure seawater simulation system and the determination of a corresponding test scheme have great significance.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to a high pressure environment simulation test bed, which is designed to at least partially solve at least one of the above problems.
In order to achieve the purpose, the utility model provides a high-pressure environment simulation test bed, which comprises a pump source, a valve control cylinder hydraulic unit, a control unit and a cooling unit; wherein:
the pump source comprises a constant-pressure variable pump which is used for providing a constant-pressure source;
the valve control cylinder hydraulic unit comprises a servo valve and an asymmetric hydraulic cylinder; the servo valve is a core element of pressure simulation closed-loop control and is used for receiving the instruction of the control unit and adjusting the size of the valve core opening, so that the pressure simulation closed-loop control is realized based on the difference value between the instruction pressure curve and the actual pressure; the asymmetric hydraulic cylinder comprises a rodless cavity and a rod cavity, wherein the rodless cavity is connected with the servo valve, and the rod cavity is connected with the buoy buoyancy adjusting system to be detected;
and the cooling unit comprises a radiator and is used for cooling the oil liquid conveyed by the pump source.
Based on the technical scheme, the utility model discloses a high pressure environment simulation test platform has one of following beneficial effect at least for prior art:
the utility model discloses can simulate the sea water pressure that the oil pocket of self-sustaining formula section buoy when oil extraction and oil return received, under different pressures, the speed of buoy oil extraction and oil return, and can detect whether there is the oil leak in buoyancy governing system, detect its reliability. Meanwhile, the servo control is adopted, so that the control precision can be improved. And has the characteristics of simple principle, safety, reliability, cost saving and the like.
Drawings
Fig. 1 is the schematic structural diagram of the high-pressure environment simulation test bed for detecting the buoy buoyancy adjusting system of the utility model.
In the above figures, the reference numerals have the following meanings:
1-constant pressure variable pump, 2-one-way valve, 3-precision filter, 4-energy accumulator, 5-servo valve, 6-pressure gauge, 7-pressure sensor, 8-hydraulic cylinder, 9, 14-overflow valve, 10-unloading electromagnetic overflow valve, 11-temperature sensor, 12-gear pump, 13-filter, 15-radiator and 16-buoy buoyancy regulating system.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
The utility model provides a high-pressure electric hydraulic pressure servo system test bench can simulate the hydraulic pressure servo control system of true sea water pressure, and the pressure instruction of transform difference on the system of test bench through the pressure information of feedback, realizes research and analysis to hydraulic pressure servo's control performance and parameter index change, makes its experimental requirement that can satisfy true operating mode.
An object of the utility model is to design a detect buoy buoyancy governing system's high pressure environment simulation test platform, can simulate buoy buoyancy governing system under different pressures the condition of oil extraction and oil return, can make the simulated pressure trail to appointed pressure depth curve simultaneously.
Specifically, the utility model discloses a high-pressure environment simulation test bed for detecting a buoy buoyancy adjusting system, which comprises a pump source, a valve control cylinder hydraulic unit, a control unit and a cooling unit; wherein:
the pump source comprises a constant-pressure variable pump which is used for providing a constant-pressure source;
the valve control cylinder hydraulic unit comprises a servo valve and an asymmetric hydraulic cylinder; the servo valve is a core element of pressure simulation closed-loop control and is used for receiving the instruction of the control unit and adjusting the size of the valve core opening, so that the pressure simulation closed-loop control is realized based on the difference value between the instruction pressure curve and the actual pressure; the asymmetric hydraulic cylinder comprises a rodless cavity and a rod cavity, wherein the rodless cavity is connected with the servo valve, and the rod cavity is connected with the buoy buoyancy adjusting system to be detected;
and the cooling unit comprises a radiator and is used for cooling the oil liquid conveyed by the pump source.
Furthermore, the pump source, the valve control cylinder hydraulic unit and the cooling unit are sequentially connected through a high-pressure pipeline to form a loop;
furthermore, a safety overflow valve is connected between the buoy buoyancy adjusting system and the asymmetric hydraulic cylinder, and the safety overflow valve is independently connected into an oil tank.
Further, the effective area ratio of the two ends of the piston of the asymmetric hydraulic cylinder is 1/3, and the input specified pressure command is one third of the actual pressure.
Further, the cooling unit still includes gear pump and temperature control device, temperature control device is including setting up the temperature sensor in the oil tank of the fluid of storage pump source transport, temperature control device controls the transport of cooling fluid based on the operation of temperature sensor feedback signal control gear pump and carries out cooling work.
Furthermore, the flow of hydraulic oil provided by the constant-pressure variable pump is automatically adjusted according to the system requirement and is driven by a driving motor;
preferably, the pump source further comprises an unloading overflow valve connected with the constant-pressure variable pump, and the unloading overflow valve is used for realizing the unloading and pressure-releasing functions of the system when the pump source is connected and is also used for adjusting the highest output pressure of the hydraulic system;
preferably, the pump source further comprises a one-way valve positioned at the outlet of the constant-pressure variable pump and used for preventing the oil from flowing back to the constant-pressure variable pump;
preferably, the pump source further comprises a high-pressure precision filter connected with the constant-pressure variable pump, and the high-pressure precision filter is used for performing fine filtration on high-pressure oil entering the hydraulic system, preventing a servo valve from being blocked and being capable of being shut down when the system fails;
preferably, the pump source further comprises an accumulator connected to the constant pressure variable pump for absorbing pressure pulsations generated by the hydraulic system.
Furthermore, the valve control cylinder hydraulic unit also comprises a pressure sensor which is used for feeding back the pressure of one section of the asymmetric hydraulic cylinder to the control unit and adjusting the servo valve through PID (proportion integration differentiation) to enable the output pressure to follow an input pressure curve;
further, the valve control cylinder hydraulic unit also comprises a pressure gauge for visually displaying the output pressure of the hydraulic system;
furthermore, a gear pump in the cooling unit independently circulates oil, and the oil is cooled by a radiator.
Further, the pressure simulation closed-loop control comprises a monitoring unit, a real-time control computer and a signal conditioning unit, wherein the monitoring unit is positioned on the uppermost layer of the control unit, runs monitoring software on the monitoring unit, and is used for monitoring the working state of the simulation test bed, receiving a control instruction of an operator and controlling the test bed to complete instruction operation;
the real-time control computer is arranged at the lower layer of the control unit, preferably realized by a singlechip, runs real-time control software on the control unit, sends a control instruction to the servo valve through the real-time control computer, controls the displacement of a valve core of the servo valve, simultaneously feeds back the acquired actual pressure at one side of the hydraulic cylinder to the real-time control computer by the pressure sensor, drives the valve core of the servo valve to move according to the difference value between a pressure curve of the instruction and the actual pressure, and adjusts the size of an opening of the valve core, thereby realizing pressure simulation closed-loop control;
the signal conditioning unit consists of a conditioning box and a corresponding connecting circuit and is used for preprocessing a control instruction sent to the servo valve and carrying out signal normalization on a signal acquired by the sensor;
and the monitoring unit is in information transmission with the real-time control computer through Ethernet.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
As shown in the structure diagram of the present invention shown in fig. 1, the present invention mainly includes a simulation test bed for detecting oil discharge and return of a buoy, which includes a pump source, a valve control cylinder hydraulic system and a cooling system; the pump source, the valve control cylinder hydraulic system and the cooling system pipeline are connected into a loop through high-pressure pipelines in sequence; the pump source comprises a constant-pressure variable pump 1, an unloading overflow valve 10, a one-way valve 2, a precision filter 3 and an energy accumulator 4, wherein the constant-pressure variable pump 1 provides a constant-pressure source and is driven by a motor; the valve control cylinder hydraulic system comprises a servo valve 5, an asymmetric hydraulic cylinder 8, a pressure sensor 7 and a pressure gauge 6, wherein a rodless cavity of the asymmetric hydraulic cylinder 8 is connected with the servo valve 5, and a rod cavity is connected with a buoy buoyancy adjusting system 16; the cooling system comprises a gear pump 12, an overflow valve 14, a filter 13 and a radiator 15 which are connected with one side of a pump source, a temperature sensor 11 is connected between the pump source and the cooling system, the cooling system is provided with a temperature control device, and the temperature control device controls the gear pump to perform cooling work according to a feedback signal of the temperature sensor; and a safety overflow valve 9 is connected between the buoy buoyancy adjusting system and the hydraulic cylinder. The safety overflow valve 9 is independently connected into the oil tank.
The test bed comprises a pump source, a valve control cylinder hydraulic system and a cooling system. The flow of the hydraulic oil provided by the constant-pressure variable pump 1 is automatically adjusted according to the system requirement; the driving motor is responsible for driving the constant-pressure variable pump 1; when the electromagnetic unloading overflow valve 10 is switched on, the unloading and pressure relief functions of the system can be realized, and the highest output pressure of the hydraulic system can be adjusted; the one-way valve 2 is positioned at the outlet of the constant-pressure variable pump, so that the oil can be prevented from flowing back to the constant-pressure variable pump 1; the high-pressure precise filter 3 finely filters high-pressure oil entering a hydraulic system, prevents the servo valve 5 from being blocked, and can be shut down when the system fails; the accumulator 4 can absorb pressure pulsation generated by the hydraulic system; the pressure gauge 6 can visually display the output pressure of the hydraulic system; the pressure sensor 7 can feed back the pressure of one section of the hydraulic cylinder to the pressure control device, and adjusts the servo valve 5 through PID to enable the output pressure to follow an input pressure curve; the temperature sensor 11 can collect the temperature of the oil tank and feed the temperature back to the temperature control device to enable the gear pump motor to operate; the motor in the cooling loop drives the gear pump 12 to independently circulate the oil, and the oil is cooled by the cooler 15.
The pressure closed-loop control principle of the test bed comprises a monitoring unit, a real-time control computer, a signal conditioning unit and the like. The monitoring unit is positioned at the uppermost layer of the control system, namely realized by an upper computer labview, runs monitoring software on the monitoring unit, belongs to a task management layer, and is used for monitoring the working state of the simulation test bed, receiving a control instruction of an operator and controlling the test bed to complete instruction operation. The real-time control computer is in control system's lower floor, the next machine promptly, the utility model discloses realize with the singlechip, run real-time control software on it, send control command for the servo valve through the real-time control computer, control servo valve case displacement, the real-time control computer is fed back to the actual pressure of pneumatic cylinder one side that pressure sensor will gather simultaneously, the real-time control computer is according to the pressure curve of instruction and the difference of the pressure of reality, drive servo valve case motion, adjust case opening size, thereby realize pressure simulation closed-loop control. The monitoring unit transmits information with the real-time control computer through the Ethernet. The signal conditioning unit consists of a conditioning box and a corresponding connecting circuit, and is used for preprocessing a control command sent to the servo valve and signals collected by the sensor and normalizing the signals.
The test method for simulating oil discharge and oil return in the high-pressure environment comprises the following steps:
in order to verify that the system can stably operate for a long time, the test carries out oil discharge and oil return under the pressure of 0-40 Mpa.
(1) Firstly, a hydraulic cylinder piston is arranged at one end close to a buoy in advance, and hydraulic oil in a buoyancy regulating system is received into an inner oil bag in advance; the buoy is connected to one side of a rod cavity of the hydraulic cylinder, and the pressure of the safety overflow valve is modulated to a certain value (more than 40 Mpa); in the software of the upper computer, a driving motor of the test bed is started, and the electromagnetic overflow valve 10 is adjusted to enable the pressure of the hydraulic system to reach the working pressure.
(2) The method comprises the steps that a specified pressure command is input into an upper computer labview, a command signal is transmitted into a single chip microcomputer, the command signal is converted into an electric signal through the single chip microcomputer and transmitted to a servo valve of a hydraulic servo control system, the servo valve receives the electric signal and then adjusts the working pressure on one side of a rodless cavity, and meanwhile, proper PID parameters are adjusted in a computer, so that the pressure simulated by a hydraulic cylinder can meet an input specified pressure curve.
(3) After the oil discharge of the buoyancy regulating system is finished, the constant-pressure variable pump driving motor is closed after unloading, then the buoyancy regulating system is closed to discharge the oil, a specified oil return pressure curve is input into the upper computer, oil return simulation is carried out until the oil return is finished, and the motor is closed after unloading.
(4) And (4) repeating the steps 1-3, and in the simulation process, when the temperature sensor reaches a certain temperature set value, controlling the temperature device to start the gear pump motor to perform cooling circulation.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A high-pressure environment simulation test bed for detecting a buoy buoyancy adjusting system is characterized by comprising a pump source, a valve control cylinder hydraulic unit, a control unit and a cooling unit; wherein:
the pump source comprises a constant-pressure variable pump which is used for providing a constant-pressure source;
the valve control cylinder hydraulic unit comprises a servo valve and an asymmetric hydraulic cylinder; the servo valve is a core element of pressure simulation closed-loop control and is used for receiving the instruction of the control unit and adjusting the size of the valve core opening, so that the pressure simulation closed-loop control is realized based on the difference value between the instruction pressure curve and the actual pressure; the asymmetric hydraulic cylinder comprises a rodless cavity and a rod cavity, wherein the rodless cavity is connected with the servo valve, and the rod cavity is connected with the buoy buoyancy adjusting system to be detected;
and the cooling unit comprises a radiator and is used for cooling the oil liquid conveyed by the pump source.
2. The high-pressure environment simulation test bed according to claim 1, wherein the pump source, the valve control cylinder hydraulic unit and the cooling unit are sequentially connected through a high-pressure pipeline to form a loop;
preferably, a safety overflow valve is connected between the buoy buoyancy adjusting system and the asymmetric hydraulic cylinder, and the safety overflow valve is independently connected into an oil tank.
3. The high-pressure environment simulation test bed according to claim 1, wherein the effective area ratio of the two ends of the piston of the asymmetric hydraulic cylinder is 1/3, and the input specified pressure command is one third of the actual pressure.
4. The high-pressure environment simulation test bed according to claim 1, wherein the cooling unit further comprises a gear pump and a temperature control device, the temperature control device comprises a temperature sensor arranged in a tank for storing oil delivered by the pump source, and the temperature control device controls the operation of the gear pump based on a feedback signal of the temperature sensor to control the delivery of cooling oil for cooling.
5. The high-pressure environment simulation test bed according to claim 1, wherein the flow of hydraulic oil provided by the constant-pressure variable pump is automatically adjusted according to system requirements and is driven by a driving motor;
preferably, the pump source further comprises an unloading overflow valve connected with the constant-pressure variable pump, and the unloading overflow valve is used for realizing the unloading and pressure-releasing functions of the system when the pump source is connected and is also used for adjusting the highest output pressure of the hydraulic system;
preferably, the pump source further comprises a one-way valve positioned at the outlet of the constant-pressure variable pump and used for preventing the oil from flowing back to the constant-pressure variable pump;
preferably, the pump source further comprises a high pressure fine filter connected to the constant pressure variable displacement pump for fine filtering high pressure oil entering the hydraulic system, preventing clogging of the servo valve, and enabling shut down when the system fails.
6. The high-pressure environment simulation test bed according to claim 1, wherein the pump source further comprises an accumulator connected to the constant-pressure variable pump for absorbing pressure pulsation generated by the hydraulic system.
7. The high-pressure environment simulation test bed according to claim 1, wherein the hydraulic unit of the valve-controlled cylinder further comprises a pressure sensor for feeding back the pressure of one segment of the asymmetric hydraulic cylinder to the control unit and adjusting the servo valve to make the output pressure follow the input pressure curve through PID.
8. The high pressure environment simulation test bed of claim 1, wherein the valve controlled cylinder hydraulic unit further comprises a pressure gauge for visually displaying the output pressure of the hydraulic system.
9. The high-pressure environment simulation test bed according to claim 1, wherein a gear pump in the cooling unit circulates oil independently, and the oil is cooled by a radiator.
10. The high-pressure environment simulation test bed according to claim 1, wherein the pressure simulation closed-loop control comprises a monitoring unit, a real-time control computer and a signal conditioning unit, wherein the monitoring unit is located at the uppermost layer of the control unit, runs monitoring software thereon, and is used for monitoring the working state of the simulation test bed, receiving a control instruction of an operator, and controlling the test bed to complete instruction operation;
the real-time control computer is arranged at the lower layer of the control unit, preferably realized by a singlechip, runs real-time control software on the control unit, sends a control instruction to the servo valve through the real-time control computer, controls the displacement of a valve core of the servo valve, simultaneously feeds back the acquired actual pressure at one side of the hydraulic cylinder to the real-time control computer by the pressure sensor, drives the valve core of the servo valve to move according to the difference value between a pressure curve of the instruction and the actual pressure, and adjusts the size of an opening of the valve core, thereby realizing pressure simulation closed-loop control;
the signal conditioning unit consists of a conditioning box and a corresponding connecting circuit and is used for preprocessing a control instruction sent to the servo valve and carrying out signal normalization on a signal acquired by the sensor;
and the monitoring unit is in information transmission with the real-time control computer through Ethernet.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111856967A (en) * | 2020-07-17 | 2020-10-30 | 山东科技大学 | Semi-physical simulation system and method for self-supporting profile buoy |
| CN112305954A (en) * | 2019-07-31 | 2021-02-02 | 天津大学 | High-pressure environment simulation test bed and simulation method for detecting buoy buoyancy adjusting system |
| CN112504656A (en) * | 2020-12-17 | 2021-03-16 | 中国科学院沈阳自动化研究所 | Buoyancy adjusting mechanism testing device for simulating underwater pressure environment |
| CN117823491A (en) * | 2023-12-14 | 2024-04-05 | 崂山国家实验室 | Testing device and testing method for hydraulic buoyancy adjusting system |
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2019
- 2019-07-31 CN CN201921230496.6U patent/CN210375734U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305954A (en) * | 2019-07-31 | 2021-02-02 | 天津大学 | High-pressure environment simulation test bed and simulation method for detecting buoy buoyancy adjusting system |
| CN111856967A (en) * | 2020-07-17 | 2020-10-30 | 山东科技大学 | Semi-physical simulation system and method for self-supporting profile buoy |
| CN111856967B (en) * | 2020-07-17 | 2024-01-12 | 山东科技大学 | Semi-physical simulation system and method for self-sustaining profile buoy |
| CN112504656A (en) * | 2020-12-17 | 2021-03-16 | 中国科学院沈阳自动化研究所 | Buoyancy adjusting mechanism testing device for simulating underwater pressure environment |
| CN117823491A (en) * | 2023-12-14 | 2024-04-05 | 崂山国家实验室 | Testing device and testing method for hydraulic buoyancy adjusting system |
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