CN108489705B - Water pressure test device and method for simulating ocean current environment - Google Patents
Water pressure test device and method for simulating ocean current environment Download PDFInfo
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- CN108489705B CN108489705B CN201810260350.XA CN201810260350A CN108489705B CN 108489705 B CN108489705 B CN 108489705B CN 201810260350 A CN201810260350 A CN 201810260350A CN 108489705 B CN108489705 B CN 108489705B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 116
- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title description 8
- 230000002706 hydrostatic effect Effects 0.000 claims abstract description 22
- 230000008859 change Effects 0.000 claims abstract description 8
- 238000010998 test method Methods 0.000 claims abstract description 5
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 claims description 22
- 239000007924 injection Substances 0.000 claims description 22
- 238000004088 simulation Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000001914 filtration Methods 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
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- 238000013461 design Methods 0.000 description 1
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- 230000003993 interaction Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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Abstract
The invention discloses a hydrostatic test device and a hydrostatic test method for simulating a ocean current environment, and relates to the technical field of ocean equipment, wherein the hydrostatic test device comprises annular pressurizing equipment, the annular pressurizing equipment forms a tubular space for providing the simulated ocean current environment, and the tubular space is used for accommodating linear equipment; a pump group for supplying circulating water with variable flow rate and pressure to the tubular space in the annular pressurizing device; an accumulator set for stabilizing the pressure of the linear device when being retracted and extended in the annular pressurizing device tubular space; the annular pressurizing device and the energy accumulator are connected with the pump group through pipelines. The hydraulic test device for simulating the ocean current environment and the experimental method thereof comprise annular pressurizing equipment, a pump set and an energy accumulator, wherein the pump set and the annular pressurizing equipment are matched for operation to obtain the simulated ocean current environment with preset pressure, flow and change modes for experiment.
Description
Technical Field
The invention relates to the technical field of marine equipment, in particular to a hydrostatic test device and method for simulating a marine ocean current environment.
Background
When the linear equipment is retracted and released in the ocean, the linear equipment is influenced by the pressure of the sea water and the ocean current. In order to research and test the related influence, a simulated hydrostatic test device is generally established on the ground, and the influence of the sea water pressure on the linear equipment can be tested and known by simulating the pressure condition of the marine environment. However, the existing equipment cannot simulate actual ocean currents, and the influence of the ocean currents on linear equipment cannot be studied. Therefore, a hydraulic test device capable of simulating a ocean current environment is needed, and high simulation of the ocean current environment can be realized on the ground so as to meet the requirement that linear equipment is simultaneously tested by the influence of sea water pressure and ocean current.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a hydrostatic test device and a hydrostatic test method for simulating a ocean current environment, which can simulate the ocean current environment on the ground.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a hydrostatic test device of simulation ocean current environment for the marine environment simulation test of line equipment includes:
An annular pressurizing device forming a tubular space for providing a simulated ocean current environment, the tubular space for accommodating the line device;
A pump unit for supplying circulating water of variable flow rate and pressure to the tubular space in the annular pressurizing apparatus;
An accumulator set for stabilizing the pressure of the linear device when deployed in the annular pressurized device tubular space;
the annular pressurizing equipment and the energy accumulator are connected with the pump set through pipelines.
On the basis of the technical scheme, the pump set comprises a water storage tank, a water injection loop, a circulating water loop, a pressurized water loop and a drainage loop, wherein the water injection loop, the circulating water loop, the pressurized water loop and the drainage loop are mutually connected in parallel and are connected with the water storage tank through pipelines; the pump group is connected with the annular pressurizing device to form a closed circulation pipeline.
On the basis of the technical scheme, the pump set further comprises a pressure relief valve for relieving pipeline pressure, and the pressure relief valve is arranged at one end, far away from the water storage tank, of the water injection loop and the pressurized water loop.
On the basis of the technical scheme, ball valves are arranged at two ends of the water injection loop and the pressurized water loop, and pneumatic ball valves are arranged at two ends of the circulating water loop and the drainage loop.
On the basis of the technical scheme, after the water injection loop is connected in parallel with the pressurized water loop, the water injection loop is connected in series with a first ball valve and then is connected into a water storage tank; the pressurized water loop comprises a fourth ball valve, a first filter, a pressurizing pump, a first pressure sensor, a one-way valve and a first pneumatic ball valve which are sequentially connected; the circulating water loop comprises a first branch and a second branch which are mutually connected in parallel, wherein the first branch comprises a second pneumatic ball valve, a second filter, a circulating pump, a second pressure sensor, a third pneumatic ball valve and a fourth pressure sensor which are sequentially connected, the second branch comprises a fourth pneumatic ball valve, the first branch and the second branch are mutually communicated, and a fifth pneumatic ball valve is arranged on the mutually communicated pipeline; the drainage loop comprises a third pressure sensor, a drainage pump and a sixth pneumatic ball valve which are sequentially connected.
On the basis of the technical scheme, the circulating pump and the pressurizing pump are driven by using variable-frequency constant-torque motors.
On the basis of the technical scheme, the auxiliary air source system comprises an air compressor, an air source triple component and an air source ball valve which are sequentially connected, an outlet of the air source ball valve is connected with a pneumatic ball valve and a pressure relief valve in the pump set, and the auxiliary air source system is used for providing a control air source for the pneumatic ball valve and the pressure relief valve in the pump set.
On the basis of the technical scheme, one end, close to the annular pressurizing equipment, of the pump set is provided with a high-pressure flowmeter, and the high-pressure flowmeter is used for detecting flow and flow velocity in the annular pressurizing equipment.
The invention also provides a marine ocean current environment water pressure test method based on the marine ocean current environment water pressure test device, which is characterized by comprising the following steps of:
S1, opening a ball valve in a water injection loop, injecting water into a tubular space of annular pressurizing equipment, and injecting water into a water storage tank;
S2, starting a circulating pump, and adjusting the power control flow rate of the circulating pump to a preset value; starting a pressurizing pump, and establishing preset pressure at a water inlet of a circulating pump;
s3, releasing the linear equipment into the tubular space for testing;
s4, recovering the linear device from the tubular space.
On the basis of the technical scheme, in the step S3, detecting the water pressure change in the tubular space of the annular pressurizing equipment through a pressure sensor, automatically opening a pressure relief valve when the pressure in the tubular space of the annular pressurizing equipment is greater than the preset pressure of 0.3MPa, and automatically closing the pressure relief valve after the pressure is relieved to the working pressure; when the pressure in the tubular space of the annular pressurizing equipment is smaller than the preset pressure of 0.3MPa, the pressurizing pump is automatically started, and the pressurizing pump is automatically closed after the annular pressurizing equipment is pressurized to the working pressure.
Compared with the prior art, the invention has the advantages that:
(1) The hydraulic test device for simulating the ocean current environment comprises annular pressurizing equipment, a pump set and an energy accumulator set, and the pump set and the annular pressurizing equipment are matched for operation to obtain the simulated ocean current environment with preset pressure, flow and change modes for experiment.
(2) The hydraulic test device for simulating the ocean current environment can perform simulation tests on the linear equipment, such as pressure resistance, fatigue life, reliability and the like, which are closer to the actual working conditions, so that support data are provided for the design improvement of the linear equipment, a large number of uncertain factors are exposed and solved in advance, and the stability and the reliability of the linear equipment are greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of a hydrostatic test apparatus for simulating ocean current environment in an embodiment of the present invention;
FIG. 2 is a schematic diagram of an auxiliary air source system in a hydrostatic test device for simulating ocean current environment in an embodiment of the invention;
In the figure: 1-annular pressurizing equipment, 2-pump group, 3-energy accumulator group, 4-linear equipment, 5-energy accumulator, 6-control ball valve, 11-water storage tank, 12-water injection loop, 13-circulating water loop, 14-pressurized water loop, 15-water discharge loop, 16-first ball valve, 17-second ball valve, 18-third ball valve, 19-fourth ball valve, 20-first filter, 21-pressurizing pump, 22-first pressure sensor, 23-check valve, 24-first pneumatic ball valve, 25-second pneumatic ball valve, 26-second filter, 27-circulating pump, 28-second pressure sensor, 29-third pneumatic ball valve, 30-fourth pneumatic ball valve, 31-fifth pneumatic ball valve, 32-third pressure sensor, 33-drain pump, 34-sixth pneumatic ball valve, 35-deflating valve, 36-safety valve, 37-pressure release valve, 38-fourth pressure sensor, 39-air compressor, 40-air source triplet, 41-air source ball valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, an embodiment of the present invention provides a hydrostatic test apparatus for simulating a marine ocean current environment, for a marine environment simulation test of a line device 4, including: an annular pressurizing device 1, wherein the annular pressurizing device 1 is used for providing a tubular space simulating ocean current environment, and the tubular space can accommodate the linear device 4; a pump unit 2, wherein the pump unit 2 is used for providing circulating water with variable flow rate and pressure to the tubular space in the annular pressurizing equipment 1; an accumulator group 3, wherein the accumulator group 3 is used for assisting in stabilizing the pressure fluctuation of the linear device 4 when the linear device is retracted and released in the tubular space of the annular pressurizing device 1; the annular pressurizing device 1 and the energy accumulator 3 are connected with the pump set 2 through pipelines.
The connection part of the pump group 2 and the annular pressurizing equipment 1 is provided with a pneumatic ball valve, a deflation valve, a safety valve, a pressure relief valve, a pressure sensor and a high-pressure flowmeter, which are used for adjusting and monitoring the necessary data such as water pressure, flow and the like in the simulation space.
Specifically, the pump set 2 comprises a water storage tank 11, a water injection loop 12, a circulating water loop 13, a pressurized water loop 14 and a drainage loop 15, wherein the water injection loop 12, the circulating water loop 13, the pressurized water loop 14 and the drainage loop 15 are mutually connected in parallel and are connected with the water storage tank 11 through pipelines; the pump group 2 is connected with the annular pressurizing device 1 to form a closed circulation pipeline. The pump set 2 further comprises a pressure relief valve 37 for relieving pipeline pressure, and the pressure relief valve 37 is arranged at one end of the water injection loop 12 and the pressurized water loop 14, which is far away from the water storage tank 11; ball valves are arranged at two ends of the water injection loop 12 and the pressurized water loop 14, and pneumatic ball valves are arranged at two ends of the circulating water loop 13 and the drainage loop 15.
The energy accumulator group 3 is formed by mutually connecting a plurality of groups of energy accumulators 5 in parallel, and the outlet of each group of energy accumulators is provided with a control ball valve 6. The accumulator 5 is a common device in the art, and is an energy accumulating device in a hydro-pneumatic system, and is used for converting energy in the system into compression energy or potential energy to store the energy at proper time, converting the compression energy or potential energy into energy such as hydraulic pressure or air pressure to release the energy when the system is needed, and re-supplying the energy to the system. Meanwhile, the energy accumulator 5 can absorb the energy in the relevant part of pipelines when the instantaneous pressure of the system is increased, so as to achieve the effect of assisting in regulating the pressure of the whole system.
The water injection loop 12 is connected in parallel with the pressurized water loop 14, is connected in series with the first ball valve 16, and is then connected into the water storage tank 11; the pressurized water circuit 14 includes a fourth ball valve 19, a first filter 20, a pressurizing pump 21, a first pressure sensor 22, a check valve 23, and a first pneumatic ball valve 24 connected in this order; the circulating water loop 13 comprises a first branch and a second branch which are mutually connected in parallel, the first branch comprises a second pneumatic ball valve 25, a second filter 26, a circulating pump 27, a second pressure sensor 28, a third pneumatic ball valve 29 and a fourth pressure sensor 38 which are sequentially connected, the second branch comprises a fourth pneumatic ball valve 30, the first branch and the second branch are mutually communicated, and a fifth pneumatic ball valve 31 is arranged on a pipeline which is mutually communicated; the drain circuit 15 includes a third pressure sensor 32, a drain pump 33, and a sixth pneumatic ball valve 34, which are connected in sequence.
In one embodiment, the circuit compositions and associated connections and interactions in the pump stack 2 are as follows:
A. Water injection loop 12
The water injection circuit 12 consists of a first ball valve 16, a second ball valve 17, a third ball valve 18 and a fourth pneumatic ball valve 30. The second ball valve 17, the third ball valve 18 and the fourth pneumatic ball valve 30 are opened to fill water into the tubular space of the annular pressurizing device 1, and when water is filled in the water storage tank 11, the tubular space of the annular pressurizing device 1 is judged to be basically full of tap water; the first ball valve 16 and the second ball valve 17 are opened to fill water into the water storage tank 11.
B. circulating water loop 13
The circulating water circuit 13 comprises a first branch and a second branch which are mutually connected in parallel, wherein the first branch comprises a second pneumatic ball valve 25, a second filter 26, a circulating pump 27, a second pressure sensor 28, a third pneumatic ball valve 29 and a fourth pressure sensor 38 which are sequentially connected, the second branch comprises a fourth pneumatic ball valve 30, the first branch and the second branch are mutually communicated, and a fifth pneumatic ball valve 31 is arranged on a pipeline which is mutually communicated. The second pneumatic ball valve 25, the third pneumatic ball valve 29, the fourth pneumatic ball valve 30 and the circulating pump 27 are started, and the air in the tubular space of the annular pressurizing device 1 can be exhausted by utilizing the no-load circulation of the circulating pump 27; after the circulation pump 27 circulates for 30min in an idle state, the second pneumatic ball valve 25 and the fourth pneumatic ball valve 30 are closed, the fifth pneumatic ball valve 31 is opened, the third pneumatic ball valve 29 is kept open, the circulation pump 27 is operated, and the annular pressurizing device 1 enters a circulating water operation mode.
The second filter 26 is used for filtering impurities in the water and the circulation pump 27 is used for powering the water flowing in the circulation water circuit 13. The circulating water loop 13 comprises a circulating pump 27 communicated through a pipeline, the circulating pump 27 is provided with a variable-frequency constant-torque motor, the running frequency of the motor of the circulating pump 27 is adjusted, the output flow rate of the circulating pump 27 can be adjusted, and the flow rate of water in the tubular space of the annular pressurizing device 1 can be adjusted.
C. Pressurized water circuit 14
The pressurized water circuit 14 includes a fourth ball valve 19, a first filter 20, a pressurizing pump 21, a first pressure sensor 22, a check valve 23, and a first pneumatic ball valve 24, which are connected in this order. The first ball valve 16, the fourth ball valve 19, the first pneumatic ball valve 24 and the pressurizing pump 21 are opened, pressurized water can be injected into the tubular space of the annular pressurizing device 1 filled with water, and the annular pressurizing device 1 enters a pressurized water operation mode.
The first filter 20 is for filtering impurities in the water and the booster pump 21 is for powering the flow of water in the pressurized water circuit 14. The pressurized-water circuit 14 includes a pressurizing pump 21 communicated through a pipe, the pressurizing pump 21 is provided with a variable-frequency constant-torque motor, the operating frequency of the motor of the pressurizing pump 21 is adjusted, and the output flow rate of the pressurizing pump 21 can be adjusted in response to the volume change caused by the wire-like device 4 when being retracted and released in the tubular space of the annular pressurizing device 1 and the leakage at the interface with the special sealing device of the annular pressurizing device 1, so that the pressure in the tubular space of the annular pressurizing device 1 can be stabilized.
D. Drainage circuit 15
The drain circuit 15 is composed of a third pressure sensor 32, a drain pump 33, a sixth pneumatic ball valve 34 and a purge valve 35. The water in the annular pressurization device can be drained by opening the air release valve 35, the sixth pneumatic ball valve 34 and the drain pump 33.
The drain pump 33 is used to power the water discharge from the annular pressurization device.
Specifically, the air release valve 35, the safety valve 36 and the pressure release valve 37 are arranged at one end of the water injection loop 12 and the pressurized water loop 14, which is far away from the water storage tank 11; the relief valve 36 and the relief valve 37 are used for relieving line pressure. The pressure relief valve 37 is interlocked with the fourth pressure sensor 38, and when the fourth pressure sensor 38 detects that the pressure fluctuation in the annular pressurizing device 1 exceeds 0.3MPa, the pressure relief valve 37 is automatically opened and closed; when the pressure in the annular pressurizing device 1 exceeds the set pressure of the relief valve 36, the relief valve 36 is automatically opened to protect the annular pressurizing device 1.
The flow of obtaining the hydrostatic test environment by using the test device of the invention is as follows:
When hydrostatic test is performed, the circulation pump 27 is isolated (cannot withstand high pressure), the pressurizing pump 21 is turned on, and an appropriate pressure within 10MPa is established in the tubular space of the annular pressurizing apparatus 1 by the pressurizing pump 21. When the linear device 4 is released, the pressure in the tubular space of the annular pressurizing device 1 is increased, the pressure relief valve 37 is automatically opened for pressure relief when the pressure fluctuation in the tubular space of the annular pressurizing device 1 exceeds 0.3MPa through interlocking the pressure relief valve 37 and the fourth pressure sensor 38, and the pressure relief valve 37 is automatically closed after the pressure relief is released to the working pressure, and the cycle is performed; when the linear device 4 is recovered, the pressure in the tubular space of the annular pressurizing device 1 is reduced, the pressurizing pump 21 is automatically started to pressurize when the pressure fluctuation in the tubular space of the annular pressurizing device 1 exceeds 0.3MPa through the interlocking of the pressurizing pump 21 and the fourth pressure sensor 38, and the pressurizing pump 21 is automatically closed after the pressurizing to the working pressure, and the cycle is performed. In the process, the accumulator group 3 only plays a role in auxiliary pressure regulation, and pressure fluctuation in the pipeline is maintained to be less than or equal to 0.3MPa.
The flow of obtaining the circulating water flow test environment by using the test device of the invention is as follows:
When the circulation hydraulic test is carried out, the circulation pump 27 is started, the proper flow rate is regulated within the range of 1m/s-3.5m/s through the circulation pump 27, the pressurizing pump 21 is started, the proper pressure is built at the inlet of the circulation pump 27 through the pressurizing pump 21, and the establishment of the circulation hydraulic test condition is completed. When the linear device 4 is released, the pressure in the tubular space of the annular pressurizing device 1 is increased, the pressure relief valve 37 is automatically opened for pressure relief when the pressure fluctuation in the tubular space of the annular pressurizing device 1 exceeds 0.3MPa through interlocking the pressure relief valve 37 and the fourth pressure sensor 38, and the pressure relief valve 37 is automatically closed after the pressure relief is released to the working pressure, and the cycle is performed; when the linear device 4 is recovered, the pressure in the tubular space of the annular pressurizing device 1 is reduced, the pressurizing pump 21 is automatically started to pressurize when the pressure fluctuation in the tubular space of the annular pressurizing device 1 exceeds 0.3MPa through the interlocking of the pressurizing pump 21 and the fourth pressure sensor 38, and the pressurizing pump 21 is automatically closed after the pressurizing to the working pressure, and the cycle is performed. In the process, the accumulator group 3 only plays a role in auxiliary pressure regulation, and pressure fluctuation in the pipeline is maintained to be less than or equal to 0.3MPa.
In a preferred embodiment, the rated flow rate of the pressurizing pump 21 is calculated so as to satisfy the maximum outer diameter Φ17mm, the maximum recovery speed 1m/s and the maximum leakage amount 10L/min of the linear device at the same time, and the rated pressure is selected so as to be 10MPa or more. The rated flow rate of the selected booster pump 21 is equal to or more than 23.6L/min (1416L/h), and the rated pressure is equal to or more than 10MPa. In consideration of the changes of the outer diameter, the recovery speed and the leakage amount of the linear device 4, the pressurizing pump 21 is required to be provided with a variable-frequency constant-torque motor, so that the output flow is adjustable, and the heat dissipation requirement of the motor is met.
In another preferred embodiment, as shown in fig. 2, an auxiliary air source system is additionally arranged in the hydrostatic test device of the present invention, the auxiliary air source system is composed of an air compressor 39, an air source triple piece 40 and an air source ball valve 41 which are sequentially connected, the outlet of the air source ball valve 41 is connected with a pneumatic ball valve and a pressure release valve in the pump set 2, and the auxiliary air source system is used for providing a control air source for the pneumatic ball valve and the pressure release valve in the pump set 2 so as to realize remote and automatic control and reduce the labor intensity of operators. The air source triplet 40 is a composition and connection structure conventional in the art, is formed by assembling three air source processing elements of an air filter, a pressure reducing valve and an oil mist device, and is used for air source purification and filtration of an air source entering a pneumatic instrument and pressure reduction until the instrument supplies rated air source pressure, and is equivalent to the function of a power transformer in a circuit.
In the implementation of the present invention, the preset output power of the circulation pump 27 and the matching degree of the related devices are key factors affecting the ocean current simulation effect, and the preset output power and the matching degree of the related devices are obtained through a series of precise calculation and adjustment processes, and the related adjustment and simulation processes are described in a specific case as follows:
In this case, the output flow and pressure of the circulation pump 27 need to meet the circulation capacities of the tubular space of the annular pressurizing device 1, such as 1m/s-2.5m/s of flow rate, 1MPa-3MPa of pressure, 2.5m/s-3.5m/s of flow rate and 1.5MPa-3MPa of pressure, and the calculation is adjusted mainly by considering the along-path pressure loss of the tubular space of the annular pressurizing device 1. The tubular space of the annular pressurizing device 1 is considered according to 800m in calculation, and 100m along-path pressure loss allowance is reserved.
According to the hydrodynamic equation:
In the formula (1):
Δp f —pipeline along-path pressure loss, pa;
Lambda-the coefficient of resistance along the way;
l-pipe length, =800 m;
d—pipe inside diameter, =0.05m;
ρ—fluid density, water pick = 1.0 x 10 3kg/m3;
v-fluid flow rate in the pipeline, m/s.
The on-way drag coefficient is determined by the fluid flow state:
in the formula (2):
Re-the number of criteria for discriminating the fluid flow state;
V—fluid kinematic viscosity, water pick-up=1.0×10 -6m2/s.
When Re < 2320, the fluid flow state is laminar, and the along-path resistance coefficient is calculated according to the following formula:
when Re is more than or equal to 2320, the fluid flow state is turbulent, and when Re is more than 3000 and less than 10 5, the along-the-way resistance coefficient is calculated according to the following formula:
λ＝0.3164Re-0.25 (4)
The calculation process and the results of the pipeline along-the-way pressure loss at different flow rates in the tubular space of the annular pressurizing device 1 are shown in table 1.
TABLE 1 calculation of pipeline along-path pressure loss and results
From the above table, it can be seen that: when v=1 m/s in the tubular space, the minimum pressure at the outlet of the circulation pump 27 is 0.168MPa; when v=2.5 m/s in the tubular space, the minimum pressure at the outlet of the circulation pump 27 is 0.85MPa; when v=3.5 m/s in the tubular space, the minimum pressure at the outlet of the circulation pump 27 is 1.47MPa.
When the flow rate range in the tubular space is 1m/s-2.5m/s, the outlet pressure range of the circulating pump 27 is 0.168MPa-0.85MPa, and the basic pressure of the tubular space of the annular pressurizing device 1 is overlapped, so that the working pressure range of the annular pressurizing device 1 is 1MPa-3MPa; when the flow rate in the tubular space ranges from 2.5m/s to 3.5m/s, the outlet pressure of the circulating pump 27 ranges from 0.85MPa to 1.47MPa, and the basic pressure of the tubular space of the annular pressurizing device 1 is overlapped, so that the working pressure range of the annular pressurizing device 1 can be 1.5MPa to 3MPa.
The circulating pump 27 is selected according to the along-path pressure loss at the highest flow rate of the tubular space, the output pressure of the circulating pump 27 is more than 1.47MPa (147 mH 2 O), and the rated flow is more than 24.73m 3/h. Considering the change of the flow rate, the circulating pump 27 is provided with a variable-frequency constant-torque motor, so that the heat dissipation requirement of the motor is met while the output flow rate is adjustable.
The invention is not limited to the embodiments described above, but a number of modifications and adaptations can be made by a person skilled in the art without departing from the principle of the invention, which modifications and adaptations are also considered to be within the scope of the invention. What is not described in detail in this specification is prior art known to those skilled in the art.
Claims (7)
1. The utility model provides a hydrostatic test device of simulation ocean current environment for the marine environment simulation test of line equipment, its characterized in that includes:
An annular pressurizing device forming a tubular space for providing a simulated ocean current environment, the tubular space for accommodating the line device;
A pump unit for supplying circulating water of variable flow rate and pressure to the tubular space in the annular pressurizing apparatus; the pump set comprises a water storage tank, a water injection loop, a circulating water loop, a pressurized water loop and a drainage loop, wherein the water injection loop, the circulating water loop, the pressurized water loop and the drainage loop are mutually connected in parallel and are connected with the water storage tank through pipelines; the pump group is connected with the annular pressurizing equipment to form a closed circulating pipeline;
An accumulator set for stabilizing the pressure of the linear device when deployed in the annular pressurized device tubular space;
The annular pressurizing equipment and the energy accumulator are connected with the pump set through pipelines;
The water injection loop is connected with the pressurized water loop in parallel, then connected with the first ball valve in series, and then connected into the water storage tank; the pressurized water loop comprises a fourth ball valve, a first filter, a pressurizing pump, a first pressure sensor, a one-way valve and a first pneumatic ball valve which are sequentially connected; the circulating water loop comprises a first branch and a second branch which are mutually connected in parallel, wherein the first branch comprises a second pneumatic ball valve, a second filter, a circulating pump, a second pressure sensor, a third pneumatic ball valve and a fourth pressure sensor which are sequentially connected, the second branch comprises a fourth pneumatic ball valve, the first branch and the second branch are mutually communicated, and a fifth pneumatic ball valve is arranged on the mutually communicated pipeline; the drainage loop comprises a third pressure sensor, a drainage pump and a sixth pneumatic ball valve which are sequentially connected;
wherein the circulating pump and the pressurizing pump are driven by a variable frequency constant torque motor, and the pressurizing pump is set to respond to the volume change caused by the linear equipment when the linear equipment is retracted and released in the annular pressurizing equipment tubular space and the pressure change in the annular pressurizing equipment tubular space caused by leakage at the interface of the special sealing device of the annular pressurizing equipment.
2. The hydrostatic test unit simulating a marine ocean current environment of claim 1, wherein: the pump set further comprises a pressure relief valve for relieving pipeline pressure, and the pressure relief valve is arranged at one end of the water injection loop and one end of the pressurized water loop, which are far away from the water storage tank.
3. The hydrostatic test unit simulating a ocean current environment of claim 2, wherein: ball valves are arranged at two ends of the water injection loop and the pressurized water loop, and pneumatic ball valves are arranged at two ends of the circulating water loop and the drainage loop.
4. The hydrostatic test unit simulating a marine ocean current environment of claim 1, wherein: the auxiliary air source system comprises an air compressor, an air source triple component and an air source ball valve which are sequentially connected, an air source ball valve outlet is connected with a pneumatic ball valve and a pressure relief valve in the pump set, and the auxiliary air source system is used for providing a control air source for the pneumatic ball valve and the pressure relief valve in the pump set.
5. The hydrostatic test unit simulating a marine ocean current environment of claim 1, wherein: and one end of the pump set, which is close to the annular pressurizing equipment, is provided with a high-pressure flowmeter, and the high-pressure flowmeter is used for detecting the flow and the flow velocity in the annular pressurizing equipment.
6. A marine ocean current environment hydrostatic test method based on the hydrostatic test apparatus for simulating a marine ocean current environment according to claim 1, characterized by comprising the steps of:
S1, opening a ball valve in a water injection loop, injecting water into a tubular space of annular pressurizing equipment, and injecting water into a water storage tank;
S2, starting a circulating pump, and adjusting the power control flow rate of the circulating pump to a preset value; starting a pressurizing pump, and establishing preset pressure at a water inlet of a circulating pump;
s3, releasing the linear equipment into the tubular space for testing;
s4, recovering the linear device from the tubular space.
7. The marine ocean current environment hydrostatic test method according to claim 6, wherein: in the step S3, detecting the water pressure change in the tubular space of the annular pressurizing equipment through a pressure sensor, automatically opening a pressure relief valve when the pressure in the tubular space of the annular pressurizing equipment is greater than the preset pressure of 0.3MPa, and automatically closing the pressure relief valve after the pressure is relieved to the working pressure; when the pressure in the tubular space of the annular pressurizing equipment is smaller than the preset pressure of 0.3MPa, the pressurizing pump is automatically started, and the pressurizing pump is automatically closed after the annular pressurizing equipment is pressurized to the working pressure.
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| CN110243695A (en) * | 2019-07-12 | 2019-09-17 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | It is a kind of for providing the pilot system of structure deformation of creep environment |
| CN114894645A (en) * | 2022-05-05 | 2022-08-12 | 江苏科技大学 | Seawater fatigue cycle simulation test device and test method |
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