CN110246407B - Experimental device for simulating seawater pressure energy operation equipment - Google Patents
Experimental device for simulating seawater pressure energy operation equipment Download PDFInfo
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- CN110246407B CN110246407B CN201910386906.4A CN201910386906A CN110246407B CN 110246407 B CN110246407 B CN 110246407B CN 201910386906 A CN201910386906 A CN 201910386906A CN 110246407 B CN110246407 B CN 110246407B
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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
- 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
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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
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20538—Type of pump constant capacity
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/25—Pressure control functions
- F15B2211/253—Pressure margin control, e.g. pump pressure in relation to load pressure
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7058—Rotary output members
Abstract
The invention belongs to the field of marine ships and discloses an experimental device for simulating seawater pressure energy operation equipment. The device comprises a gear pump, a variable motor and a fixed displacement pump, wherein the gear pump sucks oil from an oil tank and gives pressure to simulate high-pressure seawater to enter the variable motor; the variable displacement motor drives the constant delivery pump by using the oil pressure difference between the inlet and the outlet, and the simulated seawater pressure energy operation equipment drives the load by using seawater pressure; the fixed displacement pump sucks oil from the oil tank, so that the oil circulates in the fixed displacement pump and the oil tank, and the load is simulated; the overflow valve adjusts the pressure between the gear pump and the variable motor to simulate the seawater pressure at different depths; the proportional pressure valve regulates the pressure between the outlet end of the variable displacement motor and the oil tank, and is used for simulating the change of the pressure in the pressure-resistant cavity. The invention can truly simulate equipment driven by seawater pressure energy, realize the control of the seawater pressure energy, the simulated load, the pressure of the pressure-resistant cavity and the rotating speed of the variable motor, and has simple structure and easy manufacture.
Description
Technical Field
The invention belongs to the field of marine ships, and particularly relates to an experimental device for simulating seawater pressure energy operation equipment.
Background
Nowadays, most countries near the ocean are accelerating the pace of developing ocean resources, and more deep-sea operation equipment is successfully researched and put into use. The utility model provides a deep sea operation equipment divides umbilical cord type cable power supply and large capacity battery power supply two kinds from the power supply mode, one is umbilical cord type cable power supply mode, generally supply power for deep sea operation equipment on the ship is put to the cloth of surface of water from the cable, this kind of mode can guarantee the sufficient power of operation equipment, and easily control from the cloth ship, but the cost is high, equipment is complicated, it is high to arrange the ship requirement, also have the winding problem of umbilical cord cable simultaneously, another kind adopts the mode of large capacity battery for operation equipment power supply, operation equipment is from taking storage battery, get rid of the constraint of cable, the home range has been enlarged, but can have the following problem: firstly, the silver-zinc storage battery commonly used in deep sea can separate out some combustible gases such as hydrogen and the like under water, and explosion can occur when the gas separation amount reaches a certain degree; the heat productivity of the underwater lithium battery pack is not well controlled, and particularly, when the temperature of the battery is high due to the high accumulated heat to a certain degree, the performance of the battery is seriously influenced, even the battery explodes; secondly, under the high-pressure operating environment of deep sea, the resistance of group battery power supply mode to sea water seepage is very low, when the group battery takes place the sea water seepage, the consequence is more serious.
The hydrostatic pressure can be as the natural clean renewable energy that possesses of seabed high pressure sea water, and energy-concerving and environment-protective, in some specific use, when being used for driving seabed operation equipment relatively traditional energy supply means has certain advantage, for example can save devices such as motor, hydraulic pump, large capacity battery and transformation distribution equipment, simplifies the structure greatly, improves reliability and efficiency, reduce cost by a wide margin, so adopt the operating equipment of sea water pressure ability as the drive energy more and more to pay attention to in recent years.
ZL201610497832.8 is a water storage power generation system utilizing seabed pressure energy, and the system related to the invention patent utilizes the pressure energy of deep sea seabed seawater to drive a power generator set to generate power, a large-volume pressure container is sunk into the deep sea seabed, and a seawater hydraulic motor is driven to rotate by utilizing the water pressure difference between the deep sea environment and the pressure container, and a coaxial direct current generator is driven to output electric energy for deep sea exploration equipment. The system related to the patent drives a load which is a generator set, and the system requires that a motor rotates almost constantly to drive the generator set to output stable electric energy; ZL200910098770.3 is a sediment sampler driven by hydrostatic pressure, and the load driven by the system related to the patent is a sampler device and is used for drilling and coring various soft rock formations on the seabed, such as sediment, soil, frozen soil, ice and the like. The driving piston moves to drive the impact hammer to fall down to strike the sampling tube, so that the sampling tube is inserted into the sediment to a certain depth to take out a sample. The size of the load involved in the patent changes along with the change of sediment resistance, and the system requires that the movement speed of the sampling pipe keeps stable; ZL201710875167.6 adopts the static force sounding device that the sea water pressure can drive, the load that the system that this invention patent relates to drives is the feeler lever of the feeler, the variable displacement motor drives the driving wheel to rotate, drive the driven wheel to rotate again, the driving wheel cooperates with driven wheel and drives the feeler lever to move up and down through the friction; the system involved in this patent, which is used for testing of the seabed soil layer to determine certain basic physical characteristics of the soil layer, changes the load according to the resistance of the soil layer, and requires the movement speed of the feeler lever to be stable.
For the above devices operating in deep sea environment by using seawater pressure energy, before being really put into deep sea for use, it is necessary to design a laboratory device for simulating seawater pressure energy operation devices in a laboratory, and design and research on the operation process of the simulated seawater pressure energy operation devices.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides an experimental device for simulating seawater pressure energy operating equipment, which is characterized in that key components, namely a gear pump and a fixed displacement pump, are set, wherein oil pressure is given to an oil tank through the gear pump, so that an oil pressure difference is formed between an inlet end and an outlet end of a variable displacement motor, the seawater pressure is simulated, in addition, oil is circulated in the fixed displacement pump and the oil tank through the fixed displacement pump, the load at one end of the seawater pressure energy operating equipment is simulated, and the simulation of the seawater pressure energy operating equipment is realized.
In order to achieve the above object, according to the present invention, there is provided an experimental apparatus for simulating seawater pressure energy operation equipment, the apparatus comprising a gear pump, a variable displacement motor and a fixed displacement pump, wherein:
one end of the gear pump is connected with an oil tank, the other end of the gear pump is connected with the variable motor, the gear pump sucks oil from the oil tank and applies pressure to the oil, and then the oil is transmitted to the variable motor, so that the process that high-pressure seawater enters the variable motor in seawater pressure energy operation equipment is simulated;
the inlet end of the variable motor is connected with the gear pump, the outlet end of the variable motor is connected with the oil tank, oil enters from the inlet end of the variable motor and flows out from the outlet end of the variable motor to enter the oil tank, and the variable motor drives the constant delivery pump by using the oil pressure difference between the inlet end and the outlet end so as to simulate seawater pressure energy operation equipment to drive a load by using seawater pressure;
the fixed displacement pump is connected with the variable displacement motor through a shaft, two ends of the fixed displacement pump are respectively connected with an oil tank, and when the variable displacement motor drives the fixed displacement pump, the fixed displacement pump sucks oil from the oil tank, so that the oil circulates in the fixed displacement pump and the oil tank, and the load in the seawater pressure energy operation equipment is simulated;
an overflow valve is arranged between the gear pump and the variable motor, and the oil pressure at the inlet end of the variable motor is regulated through the overflow valve to simulate the seawater pressure at different depths;
a proportional pressure valve is arranged between the outlet end of the variable motor and the oil tank, the pressure between the outlet end of the variable motor and the oil tank is adjusted through the proportional pressure valve to simulate the change of the pressure in a pressure-resistant cavity of the seawater pressure energy operation equipment, the oil pressure at the inlet end and the outlet end of the variable motor is respectively controlled through the overflow valve and the proportional pressure valve, so that the oil pressure at two ends of the variable motor is controlled, the output torque of the variable motor is further controlled, and the working requirements of the seawater pressure energy operation equipment for driving loads with different sizes in different seawater depths are met.
Further preferably, a proportional pressure valve for adjusting oil pressure is arranged between the fixed displacement pump and the oil tank, so as to adjust the size of the simulation load.
Further preferably, pressure sensors are arranged between the overflow valve and the variable displacement motor, between the fixed displacement pump and the oil tank, and between the variable displacement motor and the oil tank, and are used for detecting oil pressure.
Further preferably, pressure gauges are arranged between the overflow valve and the variable displacement motor, and between the constant delivery pump and the proportional pressure valve, and are used for displaying the oil pressure detected by the pressure sensor in real time.
Further preferably, flow sensors are arranged between the overflow valve and the variable displacement motor, and between the fixed displacement pump and the proportional pressure valve, and are used for detecting the flow of oil.
Further preferably, a filter is disposed between the fixed displacement pump and the oil tank, and is used for filtering oil flowing out of the fixed displacement pump and reducing impurities in the oil flowing into the oil tank.
Further preferably, a speed sensor is arranged between the variable displacement motor and the fixed displacement pump, the speed sensor is connected with a controller, the speed sensor transmits the real-time measured rotating speed of the fixed displacement pump to the controller, and the controller controls and adjusts the displacement of the variable displacement motor so as to adjust the rotating speed of the variable displacement motor.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
1. the experimental device provided by the invention can truly simulate the working process of equipment driven to operate by seawater pressure energy, utilize constant-pressure hydraulic oil to simulate deep-sea seawater pressure energy, utilize a constant delivery pump and a proportional pressure valve to simulate the load driven by the equipment, utilize the proportional pressure valve to simulate the pressure change in a pressure-resistant cavity of the equipment, and realize the control of the seawater pressure energy, the simulated load, the pressure of the pressure-resistant cavity and the rotating speed of a variable motor;
2. the experimental device provided by the invention can truly simulate the working process of equipment driven to operate by seawater pressure energy, and can realize the control of the seawater pressure energy, the simulated load, the pressure of the pressure-resistant cavity and the rotating speed of the variable displacement motor; overall structure is simple, easily makes, convenient operation, and this kind of experimental apparatus has the characteristics of safety, repeatability operation, and through the working process of experimental data analytical equipment, the development cost of equipment can be reduced, improves the development progress.
Drawings
FIG. 1 is a schematic diagram of an experimental setup for simulating seawater pressure energy operation equipment constructed according to a preferred embodiment of the present invention;
fig. 2 is a schematic structural view of a seawater pressure energy working apparatus constructed in accordance with a preferred embodiment of the present invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
the method comprises the following steps of 1-motor, 2-gear pump, 3-overflow valve, 4-flow sensor, 5-pressure gauge, 6-pressure sensor, 7-variable motor, 8-speed sensor, 9-constant delivery pump, 10-proportional pressure valve, 11-oil tank and 12-oil filter.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Fig. 2 is a schematic structural view of a seawater pressure energy working apparatus constructed in accordance with a preferred embodiment of the present invention, and a typical structure of the current seawater pressure energy working apparatus, as shown in fig. 2, mainly includes a motor, a pressure-resistant cavity, a seawater pipe, and a load driven by the motor. The seawater motor is driven by the pressure difference between the high pressure of the high-pressure seawater and the low pressure of the pressure-resistant cavity, so as to drive a load, wherein the load can be a mechanical load (a mechanical load such as sediment sampling or static sounding resistance in fig. 2) or a power generation load, and the like.
Fig. 1 is a schematic structural diagram of an experimental facility for simulating seawater pressure energy operation equipment constructed according to a preferred embodiment of the present invention, and as shown in fig. 1, an experimental facility for simulating seawater pressure energy operation equipment is characterized in that:
the device comprises a motor 1, a gear pump 2, an overflow valve 3, a variable motor 7, a constant delivery pump 9, a proportional pressure valve 10, a pressure sensor 6, a rotating speed sensor 8, a flow sensor 4, a pressure gauge 5 and a controller.
The motor 1 with 2 combinations of gear pump, overflow valve 3 is located 2 export oil ways of gear pump, flow sensor 4, manometer 5 and pressure sensor 6 are located the oil way between 2 and the variable motor 7 of gear pump in proper order, pressure sensor 6 with proportional pressure valve 10 is located 7 export oil ways of variable motor in proper order, constant delivery pump 9 is connected with variable motor 7 through the axle, speed sensor 8 is located the rotational speed of the output shaft that detects variable motor 7 on the connecting axle, flow sensor 4, manometer 5 and pressure sensor 6 are located 9 export oil ways of constant delivery pump in proper order, proportional pressure valve 10 is located between pressure sensor 6 and the oil tank.
The motor 1 drives the gear pump 2 to rotate, hydraulic oil with certain pressure is output to simulate seawater pressure energy of driving pressure energy operation equipment, the oil pressure of a loop at the outlet of the gear pump 2 is changed by adjusting the opening degree of a valve core of an overflow valve 3 at the outlet of the gear pump 2, the pressure of the loop is kept stable, and the seawater pressure energy of the equipment at different seawater depths is simulated;
a proportional pressure valve 10 is arranged between an oil outlet of the variable motor 7 and an oil tank 11, and the return oil pressure of the variable motor can be changed by adjusting the size of a valve core opening of the proportional pressure valve 10, so that the change of the pressure in a pressure-resistant cavity of the seawater pressure energy operation equipment can be simulated; the displacement D in the variable displacement motor is variable and can be adjusted by the controller, and because the output torque of the variable displacement motor is ensured to change along with the change of the torque of the load and the rotating speed of the load driven by the variable displacement motor is unchanged, the variable displacement motor is adopted, and the rotating speed of the motor is kept unchanged by adjusting the size of the displacement D (namely the effective working volume of the variable displacement motor). If the displacement of the variable displacement motor is not changed, the rotation speed of the motor is changed along with the change of the load.
The rotating shaft of the constant delivery pump 9 is directly connected with the output shaft of the variable displacement motor, the variable displacement motor 7 drives the constant delivery pump 9 to rotate, and the proportional pressure valve 10 is used for controlling the oil return pressure of the constant delivery pump. The displacement of the fixed displacement pump is fixed, because the proportional pressure valve can adjust the oil pressure of the outlet loop of the fixed displacement pump, the simulated load torque driven by the variable displacement motor is equal to the pressure of the displacement of the fixed displacement pump multiplied by the oil way, the displacement is fixed, so the load torque can be adjusted only by changing the proportional pressure valve, and the proportional pressure valve 10 and the fixed displacement pump are combined to simulate the load of the seawater pressure energy operation equipment. The discharge capacity of the constant delivery pump 9 is fixed, and the proportional pressure valve 10 changes the return oil pressure of the constant delivery pump by adjusting the opening of the valve port, so that the load torque acting on the variable motor rotating shaft is changed, and the mechanical load change or the power generation load change during the operation of the seawater pressure energy operation equipment is simulated;
the number of the pressure sensors 6 is 3, the pressure sensors are positioned on the outlet oil circuit of the gear pump and are used for detecting the pressure of the outlet oil circuit regulated by the overflow valve; the pressure sensor 6 is positioned on the outlet loop of the quantitative pump and is used for detecting the oil pressure of the loop regulated by the proportional pressure valve 2; and the pressure sensor 6 is positioned on the outlet loop of the variable motor and is used for detecting the loop oil pressure regulated by the proportional pressure valve 1.
The rotating speed sensor 8 is positioned on the output rotating shaft of the variable motor 7, and is used for detecting the rotating speed of the output shaft of the variable motor, inputting the rotating speed into the controller according to the difference value between the actually detected speed and the set speed, and outputting a control signal to the variable motor to adjust the displacement of the variable motor, so that the speed of the output shaft of the variable motor is stabilized, and the motion stability of a load driven by the motor is kept.
The test process comprises the following steps:
in the experimental device, a motor 1 drives a gear pump 2 to rotate, and hydraulic oil with certain pressure is output. The current pressure value can be read from the pressure gauge 5. The pressure sensor 6 is used for detecting the pressure of an oil path at the outlet of the gear pump 2, and records and stores the detected pressure signal, so that the subsequent analysis and use are facilitated. The flow sensor 4 records and stores the detected flow signal of the oil circuit at the outlet of the gear pump 2, so that the subsequent analysis and use are facilitated;
the oil pressure at the outlet of the gear pump 2 can be changed by manually adjusting the opening of the valve core of the overflow valve 3, and the oil pressure is kept constant, so that the seawater pressure of the equipment at different depths of the seabed is simulated;
a rotating shaft of the constant delivery pump 9 is directly connected with an output shaft of the variable displacement motor 7, and the variable displacement motor drives the constant delivery pump to rotate;
according to the load type and the change condition, the opening degree of a valve core of a proportional overflow valve 10 is controlled by a controller, the oil pressure of an outlet loop of the fixed displacement pump 9 is changed, and the displacement of the fixed displacement pump 9 is fixed, so that the magnitude of load torque acting on a variable motor rotating shaft can be changed by only controlling the opening degree of the valve core of the proportional pressure valve 10, and the mechanical load change or the power generation load change driven by the seawater pressure energy operation equipment during operation is simulated;
the pressure sensor 6 is positioned on an outlet loop of the constant delivery pump 9 and used for detecting the oil pressure of the loop and recording and storing the detected pressure signal, so that the subsequent analysis and use are facilitated. The current pressure value can be read from the pressure gauge 5. The flow sensor 4 records and stores the detected flow signal of the oil circuit at the outlet of the fixed displacement pump 9, so that the subsequent analysis and use are facilitated;
the rotating speed sensor 8 detects the rotating speed of the output shaft of the variable motor 7, inputs the rotating speed into the controller according to the difference value between the actually detected speed and the set speed, and outputs a control signal to the variable motor to adjust the displacement of the variable motor, so that the speed of the output shaft of the variable motor is stabilized, and the motion speed of the driven load is ensured to be stable;
the opening of the valve core of the proportional pressure valve 10 is controlled by a controller, the oil pressure of an outlet loop of the variable motor 7 is changed, and the size of a pressure-resistant cavity and the change condition of the internal pressure are simulated.
The pressure sensor 6 is positioned on an outlet loop of the variable motor 7 and is used for detecting the oil pressure of an oil way at the outlet of the variable motor 7 after being adjusted by the proportional pressure valve 10, and recording and storing the detected pressure signal, so that the subsequent analysis and use are facilitated.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. The utility model provides an experimental apparatus of simulation sea water pressure can operation equipment which characterized in that, the device includes gear pump (2), variable displacement motor (7) and constant delivery pump (9), wherein:
one end of the gear pump (2) is connected with an oil tank (11), the other end of the gear pump is connected with the variable motor (7), the gear pump (2) sucks oil from the oil tank and applies pressure to the oil tank, and then the oil is transmitted to the variable motor (7), so that the process that high-pressure seawater enters the variable motor in seawater pressure energy operation equipment is simulated;
the inlet end of the variable motor (7) is connected with the gear pump (2), the outlet end of the variable motor is connected with the oil tank, oil enters from the inlet end of the variable motor and flows out of the outlet end of the variable motor to enter the oil tank, and the variable motor drives the constant delivery pump by using the oil pressure difference between the inlet end and the outlet end, so that the simulated seawater pressure energy operation equipment drives a load by using seawater pressure;
the fixed displacement pump (9) is connected with the variable displacement motor (7), two ends of the fixed displacement pump are respectively connected with an oil tank, and when the variable displacement motor drives the fixed displacement pump, the fixed displacement pump sucks oil from the oil tank, so that the oil circulates in the fixed displacement pump and the oil tank, and the load in the seawater pressure energy operation equipment is simulated;
an overflow valve (3) is arranged between the gear pump (2) and the variable motor (7), and the oil pressure at the inlet end of the variable motor is adjusted through the overflow valve to simulate the seawater pressure at different depths;
a proportional pressure valve (10) is arranged between the outlet end of the variable motor (7) and the oil tank (11), the pressure between the outlet end of the variable motor and the oil tank is adjusted through the proportional pressure valve to simulate the change of the pressure in a pressure-resistant cavity of the seawater pressure energy operation equipment, and the oil pressures of the inlet end and the outlet end of the variable motor are respectively controlled through the overflow valve (3) and the proportional pressure valve (10), so that the oil pressure difference at the two ends of the variable motor is controlled, the output torque of the variable motor is further controlled, and the working requirements of the seawater pressure energy operation equipment for driving loads with different sizes under different seawater depths are met.
2. An experimental device for simulating seawater pressure energy working equipment as claimed in claim 1, wherein a proportional pressure valve (10) for adjusting oil pressure is arranged between the fixed displacement pump (9) and the oil tank (11) so as to adjust the magnitude of the simulation load.
3. The experimental device for simulating seawater pressure energy working equipment as claimed in claim 1 or 2, wherein pressure sensors (6) are arranged between the overflow valve (3) and the variable displacement motor (7), between the fixed displacement pump (9) and the oil tank (11), and between the variable displacement motor (7) and the oil tank (11) for detecting oil pressure.
4. The experimental device for simulating seawater pressure energy working equipment as claimed in claim 3, wherein a pressure gauge (5) is arranged between the overflow valve (3) and the variable motor (7) and between the constant delivery pump (9) and the proportional pressure valve (10) for displaying the oil pressure detected by the pressure sensor in real time.
5. The experimental facility for simulating seawater pressure energy operation equipment as claimed in claim 1, wherein a flow sensor (4) is arranged between the overflow valve (3) and the variable displacement motor (7), and the fixed displacement pump and the proportional pressure valve for detecting the flow of oil.
6. An experimental installation for simulating seawater pressure energy working equipment according to claim 1, wherein a filter (12) is provided between the constant delivery pump (9) and the oil tank (11) for filtering the oil from the constant delivery pump and reducing the impurities in the oil entering the oil tank.
7. The experimental device for simulating seawater pressure energy working equipment according to claim 1, wherein a speed sensor (8) is arranged between the variable displacement motor (7) and the fixed displacement pump (9), the speed sensor is connected with a controller, the speed sensor transmits the real-time measured rotating speed of the fixed displacement pump to the controller, and the controller controls and adjusts the displacement of the variable displacement motor, so as to adjust the rotating speed of the variable displacement motor.
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