Test support device mass balancing driving system and method and flow field test system

Abstract

The invention provides a test supporting device mass balancing driving system and method and a flow field test system. The test supporting device mass balancing driving system comprises an oil conveying header pipe, two oil conveying branch pipes and an oil return header pipe. Each oil conveying branch pipe is connected with the oil conveying main pipe through a first stop valve, and a second energy accumulator is connected to each oil conveying branch pipe; outlets of the two oil conveying branch pipes are respectively communicated with two oil cavities of the hydraulic cylinder; one oil conveying branch pipe is connected with an overflow valve, the overflow valve is connected with the oil return header pipe through a first oil return branch pipe, the other oil conveying branch pipe is connected with the oil return header pipe through a second oil return branch pipe, and a second stop valve is arranged on the second oil return branch pipe. The balancing of the mass of the test model supporting part in the sinking and floating movement process of the flow field test can be realized, and the mass of the test model supporting part does not influence the model test. In addition, by adjusting the pressure of the balance energy accumulator, namely adjusting the pressure of the second energy accumulator, the frequency of balancing motion can be achieved, and broadband quality balancing from low frequency to high frequency can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of flow field testing, and in particular to a mass balancing driving system and method for a test support device and a flow field testing system. Background Art

[0002] Flow field testing is a crucial experimental method in fluid mechanics, primarily used to study the dynamic properties of objects in fluid flow. Flow field testing involves placing a model object in a flow field and artificially creating a fluid flow through it to study the fluid flow and its interaction with the model. Flow field testing involves heaving motion, and the test object is typically lifted to a neutral position using a test model support before the experiment is conducted. Actual experiments have found that the mass of the test model support significantly influences the flow field motion of the test object. Summary of the Invention

[0003] In view of the above problems, the present invention is proposed to provide a test support device mass balancing drive system, method and flow field test system that overcome the above problems or at least partially solve the above problems, which can achieve the balancing of the mass of the test model support components during the vertical swing movement of the flow field test, and the mass of the test model support components does not affect the model test.

[0004] Specifically, the present invention provides a mass trim drive system for a test support device, which includes an oil main pipe, two oil branch pipes and an oil return main pipe;

[0005] The oil main pipe is connected to a first accumulator;

[0006] Each of the oil delivery branch pipes is connected to the oil delivery main pipe through a first stop valve, and each of the oil delivery branch pipes is connected to a second accumulator; the outlets of the two oil delivery branch pipes are respectively connected to the two oil chambers of the hydraulic cylinder; wherein,

[0007] One of the oil delivery branch pipes is connected to a relief valve, which is connected to the oil return main pipe through a first oil return branch pipe, and the other oil delivery branch pipe is connected to the oil return main pipe through a second oil return branch pipe, and the second oil return branch pipe is provided with a second stop valve; or each of the oil delivery branch pipes is connected to a relief valve, and each of the relief valves is connected to the oil return main pipe through an oil return branch pipe.

[0008] Optionally, a hydraulic lock is provided on each of the oil delivery branch pipes, the second accumulator is connected to the pipe section of the oil delivery branch pipe between the hydraulic lock and the first shut-off valve, and the corresponding overflow valve is connected to the pipe section of the oil delivery branch pipe between the hydraulic lock and the first shut-off valve.

[0009] Optionally, a pressure reducing valve is provided on the section of the oil delivery main pipe between the connection point of the first accumulator and the first shut-off valve, and the pressure reducing valve is also connected to the oil return main pipe;

[0010] A safety valve is connected to the pipe section of the oil delivery branch pipe between the hydraulic lock and the oil chamber, and the safety valve is communicated with the oil return main pipe.

[0011] Optionally, a first pressure sensor is connected to the section of the oil main pipe between the pressure reducing valve and the first stop valve;

[0012] A second pressure sensor is connected to the pipeline of the oil delivery branch pipe connected to the relief valve, which is located between the connection point of the first stop valve and the relief valve;

[0013] A third pressure sensor is connected to the pipe section of the oil delivery branch pipe between the safety valve and the oil chamber.

[0014] Optionally, a hydraulic lock control valve is further included, and the hydraulic lock control valve is connected to the oil delivery main pipe, the hydraulic lock and the oil return main pipe through a pipeline.

[0015] Optionally, it further includes a guide rail clamp and a clamp control valve; the clamp control valve is connected to the oil delivery main pipe, the guide rail clamp and the oil return main pipe through a pipeline.

[0016] The present invention also provides a flow field test system, including a flow field, a hydraulic cylinder, a vertical swing motion guide rail and a test model support component, and a mass balancing drive system of any of the above-mentioned test support devices; the test model support component can be installed on the vertical swing motion guide rail so as to move up and down, the output rod of the hydraulic cylinder is vertically arranged, and the output rod is connected to the test model support component; the outlets of the two oil delivery pipes are respectively connected to the two oil chambers of the hydraulic cylinder.

[0017] Optionally, there are two hydraulic cylinders, which are respectively arranged on both sides of the test model support component; the lower end of the cylinder body of the hydraulic cylinder is universally connected to the fixed base; the upper end of the output rod is universally connected to the test model support component;

[0018] An upper limit buffer is provided on the upper side of the test model support component, and a lower limit buffer is provided on the lower side.

[0019] The present invention also provides a mass balancing method using any of the above-mentioned mass balancing drive systems of the test support device, comprising:

[0020] regulating the charging pressure of the two second accumulators;

[0021] Firstly, charging the hydraulic oil into one of the second accumulators and then charging the hydraulic oil into the other second accumulator in a preset order;

[0022] Inputting the hydraulic oil to control the output rod of the hydraulic cylinder to move upward, and controlling the speed at which the output rod moves upward;

[0023] controlling the relief valve to adjust the pressure difference between the two second accumulators;

[0024] Conduct flow field tests.

[0025] The test support device mass balancing drive system, method, and flow field test system of the present invention comprise two second accumulators and two hydraulic cylinders. The two hydraulic cylinders support the test model support component, and the pressure difference between the two second accumulators can balance the mass of the test model support component, so that the test piece mounted on the test model support component is not affected by the test model support component during the flow field test. That is, the test support device mass balancing drive system can balance the mass of the test model support component during the heaving motion of the flow field test, and the mass of the test model support component does not affect the model test. Furthermore, the frequency of the balancing motion can be adjusted by adjusting the pressure of the balancing accumulator, that is, adjusting the pressure of the second accumulator, thereby achieving broadband mass balancing from low to high frequencies.

[0026] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0028] Figure 1 is a schematic structural diagram of a mass balancing drive system for a test support device according to one embodiment of the present invention;

[0029] Figure 2 FIG. 4 is a schematic structural diagram of a flow field testing system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] Refer to the following Figures 1 to 2To describe the mass balancing drive system, method and flow field test system of the test support device of the embodiment of the present invention. In the description of this embodiment, it should be understood that the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0031] Unless otherwise expressly defined or limited, terms such as "disposed," "installed," "connected," "connected," "fixed," and "coupled" should be broadly interpreted. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two elements or interaction between two elements, unless otherwise expressly defined. A person of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0032] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact via another feature between them. That is, in the description of this embodiment, the first feature being "above," "above," and "above" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below," "below," or "below" the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of the present embodiment, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples.

[0034] Figure 1FIG. 1 is a schematic structural diagram of a mass balancing drive system for a test support device according to an embodiment of the present invention. Figure 1 As shown, and reference Figure 2 The embodiment of the present invention provides a mass balancing drive system 100 for a test support device, comprising an oil main pipe 21, two oil branch pipes 22 and an oil return main pipe 23. The oil main pipe 21 is connected to a first accumulator 24, which is a pressure-stabilizing accumulator that can stabilize the pressure of an external oil source. Each oil branch pipe 22 is connected to the oil main pipe 21 through a first shut-off valve, and each oil branch pipe 22 is connected to a second accumulator, which is called a balancing accumulator. The outlets of the two oil branch pipes are respectively connected to the two oil chambers of the hydraulic cylinder 40. An overflow valve 35 is connected to one oil branch pipe 22, and the overflow valve 35 is connected to the oil return main pipe 23 through the first oil return branch pipe. The other oil branch pipe 22 is connected to the oil return main pipe 23 through the second oil return branch pipe, and a second shut-off valve 36 is provided on the second oil return branch pipe.

[0035] When the mass balancing drive system 100 of the test support device of the embodiment of the present invention is in operation, it inflates the two second accumulators and adjusts the pressure of the second accumulators to adapt to the frequency of the corresponding flow field test. Then, the two first stop valves are closed, and hydraulic oil is delivered to the first accumulator 24. After the pressure in the first accumulator 24 reaches a preset value, one first stop valve is controlled to open. The oil chamber corresponding to the first stop valve is the rod chamber 42 of the hydraulic cylinder 40, so that the corresponding second accumulator receives hydraulic oil. After the pressure of the second accumulator reaches the preset value, the first stop valve is closed and the other first stop valve is opened, so that the corresponding second accumulator receives hydraulic oil. After the pressure of the second accumulator reaches the preset value, the hydraulic oil is continued to be charged, so that the output rods 41 of the two hydraulic cylinders 40 move upward, driving the test model support component 60 to move to the preset position. After the test model support component 60 moves to the preset position, the pressure in the corresponding second accumulator is adjusted via the relief valve 35 so that the pressure difference between the two second accumulators balances the mass of the test model support component 60, achieving mass balance of the test model support component 60. The second stop valve 36 and the relief valve 35 are also used to relieve pressure from the hydraulic cylinder 40. Both the first stop valve and the second stop valve 36 can be two-way stop valves.

[0036] The test support device mass balancing drive system 100 of the present invention comprises two second accumulators and two hydraulic cylinders 40. The two hydraulic cylinders 40 support the test model support component 60. The pressure difference between the two second accumulators can balance the mass of the test model support component 60, so that the test piece mounted on the test model support component 60 is not affected by the test model support component 60 during the flow field test. In other words, the test support device mass balancing drive system 100 can balance the mass of the test model support component during the heaving motion of the flow field test, and the mass of the test model support component does not affect the model test. Furthermore, the frequency of the balancing motion can be adjusted by adjusting the pressure of the balancing accumulator, that is, adjusting the pressure of the second accumulator, thereby achieving broadband mass balancing from low to high frequencies.

[0037] In some alternative embodiments of the present invention, each oil delivery branch pipe 22 is connected to a relief valve 35 , and each relief valve 35 is connected to the oil return main pipe 23 through an oil return branch pipe.

[0038] In some embodiments of the present invention, the relief valve 35 may be an electric proportional relief valve. By adjusting the set pressure of the relief valve 35 , the output force of the heave balancing hydraulic cylinder 40 and the gravity of the test model support component 60 are balanced.

[0039] In some embodiments of the present invention, a hydraulic lock 37 is provided on each oil delivery branch pipe 22, the second accumulator is connected to the pipe section of the oil delivery branch pipe 22 between the hydraulic lock 37 and the first shut-off valve, and the corresponding overflow valve 35 is connected to the pipe section of the oil delivery branch pipe 22 between the hydraulic lock 37 and the first shut-off valve.

[0040] In some embodiments of the present invention, a pressure reducing valve 38 is provided on the section of the oil delivery main pipe 21 between the connection point of the first accumulator 24 and the first shut-off valve. The pressure reducing valve 38 is also connected to the oil return main pipe 23 .

[0041] A safety valve 39 is connected to the section of the oil delivery pipe 22 between the hydraulic lock 37 and the oil chamber. This safety valve 39 is connected to the oil return main pipe 23. Safety valve 39 can be a direct-acting relief valve that connects to the oil circuit of the heave balancing hydraulic cylinder 40. This valve provides safety protection for the hydraulic cylinder 40 by setting the relief pressure.

[0042] In some embodiments of the present invention, a first pressure sensor 51 is connected to the section of the oil main pipe 21 between the pressure reducing valve 38 and the first shut-off valve. This sensor is used to detect the pressure of the oil main pipe 21 after the pressure is reduced by the pressure reducing valve 38. A second pressure sensor 52 is connected to the section of the oil branch pipe 22 connected to the relief valve 35 between the connection point of the first shut-off valve and the relief valve 35. This sensor is used to detect the pressure of the corresponding second accumulator. A third pressure sensor 53 is connected to the section of the oil branch pipe 22 between the safety valve 39 and the oil chamber. This sensor is used to detect the pressure of the oil chamber of the hydraulic cylinder 40. Two third pressure sensors 53 are provided, one to detect the pressure of the rodless chamber and the other to detect the pressure of the rod chamber.

[0043] In some embodiments of the present invention, the test support device mass trim drive system 100 further includes a hydraulic lock control valve 45, which is connected to the oil supply manifold 21, the hydraulic lock 37, and the oil return manifold 23 via pipelines. The hydraulic lock control valve 45 can be a three-way solenoid valve, and the heave balancing hydraulic cylinder 40 is locked and unlocked by switching control of the three-way solenoid valve.

[0044] In some embodiments of the present invention, the test support device mass trim drive system 100 further includes a guide rail clamp 55 and a clamp control valve 56. The clamp control valve 56 is connected to the oil main pipe 21, the guide rail clamp 55, and the oil return main pipe 23 via a pipeline. A pressure reducing valve 57 is provided between the oil main pipe 21 and the clamp control valve 56. The clamp control valve 56 is a three-way solenoid shut-off valve. Four guide rail clamps 55 may be provided. A guide rail clamp control oil circuit pressure sensor 58 is connected to the pipeline between the pressure reducing valve 38 and the clamp control valve 56. The pressure reducing valve 57 reduces the pressure to the required operating pressure.

[0045] like Figure 2 As shown, an embodiment of the present invention further provides a flow field test system comprising an artificial flow field 70, a hydraulic cylinder 40, a heave motion guide rail 61, a test model support component 60, and the test support device mass balancing drive system 100 of any of the above embodiments. The test model support component 60 is mounted on the heave motion guide rail 61 so as to be movable up and down. The output rod 41 of the hydraulic cylinder 40 is vertically arranged and connected to the test model support component 60. The outlets of the two oil delivery pipes are respectively connected to the two oil chambers of the hydraulic cylinder 40.

[0046] like Figure 2As shown, in some embodiments of the present invention, there are two hydraulic cylinders 40, which are respectively arranged on both sides of the test model support component 60. The lower end of the cylinder body of the hydraulic cylinder 40 is universally connected to the artificial flow field 70. Specifically, a fixed base is provided in the artificial flow field, and the lower end of the cylinder body of the hydraulic cylinder 40 is universally connected to the fixed base through a ball joint. The upper end of the output rod 41 is universally connected to the test model support component 60. Specifically, a ball joint is provided between the upper end of the output rod 41 and the test model support component 60. An upper limit buffer 65 is provided on the upper side of the test model support component 60, and a lower limit buffer 66 is provided on the lower side. The guide rail clamp 55 is installed between the test model support component 60 and the sinking and floating guide rail 61, and the guide rail clamp 55 moves with the test model support component 60.

[0047] An embodiment of the present invention further provides a mass balancing method using the mass balancing drive system 100 of the test support device in any of the above embodiments, comprising:

[0048] Regulate the charging pressure of the two second accumulators.

[0049] According to a preset sequence, the hydraulic oil is first charged into one second accumulator, and then the hydraulic oil is charged into the other second accumulator.

[0050] The input hydraulic oil controls the output rod 41 of the hydraulic cylinder 40 to move upward, and controls the speed at which the output rod 41 moves upward.

[0051] The control overflow valve 35 adjusts the pressure difference between the two second accumulators.

[0052] Conduct flow field tests.

[0053] Because the two second accumulators and two hydraulic cylinders 40 support the test model support component 60, the pressure difference between the two second accumulators can balance the mass of the test model support component 60, so that the test piece mounted on the test model support component 60 is not affected by the test model support component 60 during the flow field test. In other words, the test support device mass balancing drive system 100 can balance the mass of the test model support component 60 during the heaving motion of the flow field test, and the mass of the test model support component 60 does not affect the model test. Furthermore, the frequency of the balancing motion can be adjusted by adjusting the pressure of the balancing accumulator, that is, adjusting the pressure of the second accumulator, thereby achieving broadband mass balancing from low to high frequencies.

[0054] Specifically, in some embodiments of the present invention, the two second accumulators are a first balancing accumulator 31 and a second balancing accumulator 32. The first balancing accumulator 31 is used to control the rodless chamber 43 of the hydraulic cylinder 40, while the second balancing accumulator 32 is used to control the rod chamber 42 of the hydraulic cylinder 40. The first balancing accumulator 31 is used in conjunction with a relief valve 35. The first shutoff valves are a first two-way shutoff valve 33 for controlling the rodless chamber 43 and a second two-way shutoff valve 34 for controlling the rod chamber 42.

[0055] Mass balancing methods include:

[0056] The charging pressure of the first balancing accumulator 31 and the second balancing accumulator 32 is adjusted to adapt to the system operating frequency. The higher the operating frequency, the higher the charging pressure.

[0057] Adjust the pressure of the two safety valves 39 to the safety protection pressure.

[0058] Before the start, the test model support component 60 and the test piece on the test model support component 60 are at the lowest position and parked on the lower limit buffer 66, the clamp control valve 56 is de-energized, and the guide rail clamp 55 is clamped.

[0059] After starting work, the second two-way stop valve 34 is energized first to charge the second balance accumulator 32 of the rod chamber 42 of the hydraulic cylinder 40 with oil, and the oil charging pressure is determined according to the debugging situation.

[0060] After the second balancing accumulator 32 and the rod chamber 42 are filled with oil, the clamp control valve 56 is energized, the guide rail clamp 55 is released, the second two-way stop valve 34 is de-energized, the hydraulic lock control valve 45 is energized, the hydraulic lock 37 is opened, and the first two-way stop valve 33 is energized. The system then charges the first balancing accumulator 31 of the rodless chamber 43 with oil. When the oil pressure reaches a certain value, the test model support component 60 moves upward, and the speed of movement is adjusted by the overflow valve 35.

[0061] After the test model support component 60 and the test piece thereon reach the neutral position, the first two-way stop valve 33 loses power, and the pressure difference of the hydraulic cylinder 40 is adjusted through the relief valve 35, that is, the pressure difference between the first balancing accumulator 31 and the second balancing accumulator 32 is adjusted so that the pressure difference balances the gravity of the test model support component 60. The pressure difference value is determined according to actual conditions.

[0062] After the adjustment is completed, the clamp control valve 56 loses power, the guide rail clamp 55 is clamped, the hydraulic lock control valve 45 loses power, the hydraulic lock 37 is closed, and the flow field adjustment is waited for.

[0063] After the flow field is adjusted, the hydraulic lock control valve 45 is energized, the hydraulic lock 37 is opened, the clamp control valve 56 is energized, the guide rail clamp 55 is released, and the freedom of the heave motion is released.

[0064] The external flow field is adjusted so that the test model support component 60 performs heaving motion at different frequencies along the heaving motion guide rail 61 in the vertical direction.

[0065] When the system detects an abnormality or an artificial emergency stop, the clamp control valve 56 and the hydraulic lock control valve 45 are de-energized, thereby locking the heaving motion in a short time.

[0066] When the flow field test is completed normally, the second stop valve 36 is energized, the second balancing accumulator 32 is drained, and the relief valve 35 is adjusted to drain the first balancing accumulator 31. The test model support component 60 and the test piece slowly descend to the lower limit due to gravity, the clamp control valve 56 and the hydraulic lock control valve 45 are de-energized, and the heave motion is locked.

[0067] At this point, those skilled in the art will recognize that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. A mass balancing drive system for a test support device, characterized in that: It includes the oil delivery main pipe, two oil delivery branch pipes and the oil return main pipe; The oil delivery main pipe is connected to a first accumulator; Each of the oil delivery branch pipes is connected to the oil delivery main pipe through a first stop valve, and each of the oil delivery branch pipes is connected to a second accumulator; the outlets of the two oil delivery branch pipes are respectively connected to the two oil chambers of the hydraulic cylinder; wherein, One of the oil delivery branch pipes is connected to a relief valve, and the relief valve is connected to the oil return main pipe through a first oil return branch pipe. Another of the oil delivery branch pipes is connected to the oil return main pipe through a second oil return branch pipe, and a second stop valve is provided on the second oil return branch pipe; or, each of the oil delivery branch pipes is connected to a relief valve, and each of the relief valves is connected to the oil return main pipe through an oil return branch pipe.

2. The mass balancing drive system of the test support device according to claim 1, characterized in that: A hydraulic lock is provided on each of the oil delivery branch pipes, the second accumulator is connected to the pipe section of the oil delivery branch pipe between the hydraulic lock and the first stop valve, and the corresponding overflow valve is connected to the pipe section of the oil delivery branch pipe between the hydraulic lock and the first stop valve.

3. The mass balancing drive system of the test support device according to claim 2, characterized in that: A pressure reducing valve is provided on the pipe section of the oil delivery main pipe between the connection point of the first accumulator and the first stop valve, and the pressure reducing valve is also connected to the oil return main pipe; A safety valve is connected to the pipe section of the oil delivery branch pipe between the hydraulic lock and the oil chamber, and the safety valve is communicated with the oil return main pipe.

4. The mass balancing drive system for the test support device according to claim 3, characterized in that: A first pressure sensor is connected to the pipe section of the oil delivery main pipe between the pressure reducing valve and the first stop valve; A second pressure sensor is connected to the pipeline of the oil delivery branch pipe connected to the overflow valve between the connection point of the first stop valve and the overflow valve; A third pressure sensor is connected to the pipe section of the oil delivery branch pipe between the safety valve and the oil chamber.

5. The mass balancing drive system for the test support device according to claim 2, characterized in that: It also includes a hydraulic lock control valve, which is connected to the oil delivery main pipe, the hydraulic lock and the oil return main pipe through a pipeline.

6. The mass balancing drive system of the test support device according to claim 1, characterized in that: It also includes a guide rail clamp and a clamp control valve; the clamp control valve is connected to the oil delivery main pipe, the guide rail clamp and the oil return main pipe through a pipeline.

7. A flow field test system, comprising a flow field, characterized in that: Also includes: A hydraulic cylinder, a heave motion guide rail and a test model support component, and a mass balancing drive system for a test support device as claimed in any one of claims 1 to 6; The test model support component is installed on the vertical swing motion guide rail in a manner that it can move up and down. The output rod of the hydraulic cylinder is vertically arranged, and the output rod is connected to the test model support component. The outlets of the two oil delivery branch pipes are respectively connected to the two oil chambers of the hydraulic cylinder.

8. The flow field test system according to claim 7, characterized in that: There are two hydraulic cylinders, which are respectively arranged on both sides of the test model support component; the lower end of the cylinder body of the hydraulic cylinder is universally connected to the fixed base; the upper end of the output rod is universally connected to the test model support component; An upper limit buffer is arranged on the upper side of the test model support component, and a lower limit buffer is arranged on the lower side; The guide rail clamp is installed between the test model supporting component and the heave motion guide rail, and the guide rail clamp moves with the test model supporting component.

9. A mass balancing method using the mass balancing drive system of a test support device according to any one of claims 1 to 6, characterized in that: include: regulating the charging pressure of the two second accumulators; Firstly, according to a preset sequence, one of the second accumulators is charged with hydraulic oil, and then another of the second accumulators is charged with hydraulic oil; Inputting the hydraulic oil to control the output rod of the hydraulic cylinder to move upward, and controlling the speed at which the output rod moves upward; controlling the relief valve to adjust the pressure difference between the two second accumulators; Conduct flow field tests.

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