Mass inertia balancing system of test supporting device

Abstract

The utility model provides a mass inertia balancing system of a test supporting device. The mass inertia balancing system comprises an oil conveying pipe, two hydraulic cylinder oil pipes, an oil return pipe, a hydraulic cylinder, a heaving motion guide rail and a test model supporting component, the output rod is provided with a displacement sensor, and the test model supporting part is provided with a speed and acceleration sensor. A force sensor is arranged on the test model supporting part so as to detect the acting force between the test model supporting part and a tested piece mounted on the test model supporting part; and according to the acting force and the speed and acceleration detected by the speed and acceleration sensor, at least the servo valve is controlled so as to control the lifting of the test model supporting part and enable the acting force to be within a preset value, thereby balancing the mass and inertia of the test model supporting part. Therefore, the quality and inertia of the test model supporting part do not affect the model test.

Description

Technical Field

[0001] The utility model relates to the technical field of flow field testing, in particular to a mass inertia balancing system and a mass inertia balancing method for a test support device. 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. Actual experiments have found that factors such as the mass and inertia of the test model support significantly influence the flow field motion of the test object. Utility Model Content

[0003] In view of the above problems, the present invention is proposed to provide a test support device mass-inertia balancing system and mass-inertia balancing method that overcome the above problems or at least partially solve the above problems. The system can achieve the balancing of the mass and inertia of the test model support components during the heaving motion of the flow field test, and the mass and inertia of the test model support components do not affect the model test.

[0004] Specifically, the utility model provides a mass inertia balancing system for a test support device, which includes an oil delivery pipe, two hydraulic cylinder oil pipes, an oil return pipe, a hydraulic cylinder, a heave motion guide rail, and a test model support component;

[0005] The test model support component is mounted on the heave motion guide rail so as to be movable up and down. The output rod of the hydraulic cylinder is vertically arranged and connected to the test model support component. The outlets of the two hydraulic cylinder oil pipes are respectively connected to the two oil chambers of the hydraulic cylinder.

[0006] The two hydraulic cylinder oil pipes are connected to the oil delivery pipe and the oil return pipe through a servo valve, and the servo valve is configured to connect one hydraulic cylinder oil pipe to the oil delivery pipe and the other hydraulic cylinder oil pipe to the oil return pipe; an accumulator is connected to the oil delivery pipe;

[0007] The output rod is provided with a displacement sensor, and the test model support component is provided with a velocity and acceleration sensor; the test model support component is provided with a force sensor to detect the force between the test model support component and the test piece mounted on the test model support component; and the servo valve is at least controlled according to the force, the velocity, and the acceleration detected by the velocity and acceleration sensors to control the lifting and lowering of the test model support component and to keep the force within a preset value, thereby balancing the mass and inertia of the test model support component.

[0008] Optionally, each hydraulic cylinder oil pipe is connected to a safety valve, and each safety valve is connected to the oil return pipe via an oil return branch pipe.

[0009] Optionally, there are two hydraulic cylinders, which are respectively arranged on both sides of the test model support component;

[0010] Each hydraulic cylinder oil pipe is connected to the corresponding oil chambers of the two hydraulic cylinders through two branch pipes. A shuttle valve is provided between the two branch pipes. The shuttle valve is connected to the corresponding safety valve so that the safety valve is connected to each hydraulic cylinder oil pipe.

[0011] Optionally, the mass inertia balancing system of the test support device further comprises a pressure reducing valve provided on the oil pipeline;

[0012] The accumulator is connected to the oil pipeline between the pressure reducing valve and the servo valve; a first pressure sensor is connected to the section of the oil pipeline between the pressure reducing valve and the servo valve.

[0013] Optionally, a second pressure sensor is connected to the pipeline of each branch pipe between the connection point of the oil chamber and the shuttle valve.

[0014] Optionally, it further comprises a guide rail clamp and a clamp control valve; the clamp control valve is connected to the oil delivery pipe, the guide rail clamp and the oil return pipe through a clamp pipeline;

[0015] The guide rail clamp is installed between the test model support component and the heave motion guide rail, and the guide rail clamp moves with the test model support component;

[0016] The clamp pipeline is connected to a guide rail clamp control oil circuit pressure sensor;

[0017] The clamp pipeline is connected to the oil delivery pipe between the pressure reducing valve and the servo valve.

[0018] Optionally, the lower end of the cylinder body of the hydraulic cylinder is universally connected to a fixed base of the artificial flow field; and the upper end of the output rod is universally connected to the test model support component.

[0019] Optionally, 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.

[0020] The present invention also provides a mass inertia balancing method using any of the above-mentioned mass inertia balancing systems of the test support device, which comprises:

[0021] Acquiring position information using the displacement sensor;

[0022] controlling the servo valve according to the position information to move the test model support component to a preset position;

[0023] adjusting the artificial flow field where the test model support component and the test piece mounted on the test model support component are located;

[0024] Obtaining the applied force, the velocity, and the acceleration using a velocity and acceleration sensor and the force sensor;

[0025] At least the servo valve is controlled according to the acting force, the speed, and the acceleration to control the lifting and lowering of the test model support component, and the acting force is kept within a preset value when controlling the lifting and lowering of the test model support component.

[0026] In the mass-inertia balancing system and mass-inertia balancing method of the test support device of the present invention, since a displacement sensor, a velocity and acceleration sensor, and a force sensor are provided, at least a servo valve can be controlled according to the applied force, velocity, and acceleration, thereby controlling the raising and lowering of the test model support component and keeping the applied force within a preset value. In this way, the mass and inertia of the test model support component can be balanced, and the mass and inertia of the test model support component do not affect the model test.

[0027] 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

[0028] 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:

[0029] Figure 1 1 is a schematic structural diagram of a mass inertia balancing system of a test support device according to an embodiment of the present utility model;

[0030] Figure 2 It is a schematic partial structural diagram of a mass inertia balancing system of a test support device according to one embodiment of the present utility model. DETAILED DESCRIPTION

[0031] Refer to the following Figures 1 to 2To describe the mass-inertia balancing system and mass-inertia balancing method of the test support device of the embodiment of the present utility model. In the description of this embodiment, it should be understood that the terms "first" and "second" are only used for descriptive purposes, 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 utility model, the meaning of "multiple" 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 other features may be further included.

[0032] Unless otherwise expressly specified or limited, terms such as "disposed," "installed," "connected," "connected," "fixed," and "coupled" should be interpreted broadly. 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 limited. A person of ordinary skill in the art should be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] 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.

[0034] In the description of the present embodiment, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," 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 schematic representations 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.

[0035] Figure 1FIG. 1 is a schematic structural diagram of a mass inertia balancing system of a test support device according to an embodiment of the present invention. Figure 1 As shown, and reference Figure 2 An embodiment of the present invention provides a mass inertia balancing system for a test support device, including an oil delivery pipe 21, two hydraulic cylinder oil pipes 22, an oil return pipe 23, an artificial flow field 70, a hydraulic cylinder 40, a vertical swing motion guide rail 61 and a test model support component 60.

[0036] The test model support member 60 is mounted on a vertically movable heave guide rail 61. The output rod 41 of the hydraulic cylinder 40 is vertically arranged and connected to the test model support member 60. The outlets of the two hydraulic cylinder oil pipes 22 are connected to the two oil chambers of the hydraulic cylinder 40 respectively.

[0037] The oil delivery pipe 21 is connected to an accumulator 24, which is a pressure-stabilizing accumulator that can stabilize the pressure of the external oil source. The external oil source provides high-pressure hydraulic oil to the entire system through the oil delivery pipe 21.

[0038] The two hydraulic cylinder oil pipes 22 are connected to the oil delivery pipe 21 and the oil return pipe 23 through the servo valve 33 . The servo valve 33 is configured to connect one hydraulic cylinder oil pipe 22 to the oil delivery pipe 21 and the other hydraulic cylinder oil pipe 22 to the oil return pipe 23 .

[0039] A displacement sensor 81 is provided on the output rod 41, and a velocity and acceleration sensor 82 is provided on the test model support component 60. A force sensor 83 is provided on the test model support component 60 to detect the force between the test model support component 60 and the test piece mounted on the test model support component 60. The servo valve 33 is at least controlled based on the force, velocity, and acceleration detected by the acceleration sensor 82 to control the raising and lowering of the test model support component 60 and keep the force within a preset value, thereby balancing the mass and inertia of the test model support component 60.

[0040] During operation, the mass-inertia balancing system of the test support device of the present embodiment delivers hydraulic oil to the accumulator 24. When the pressure in the accumulator 24 reaches a preset value, the servo valve 33 is controlled to connect the hydraulic cylinder oil pipe 22 connecting the rodless chamber 43 of the hydraulic cylinder 40 with the oil delivery pipe 21, while simultaneously connecting the hydraulic cylinder oil pipe 22 connecting the rod chamber 42 of the hydraulic cylinder 40 with the oil return pipe 23. Based on information obtained by the displacement sensor 81, the output rods 41 of the two hydraulic cylinders 40 move upward, driving the test model support component 60 to a preset position. The artificial flow field 70 is then adjusted, and a flow field test is performed. During the flow field test, the velocity and acceleration sensors and the force sensor 83 are used to obtain the applied force, velocity, and acceleration. The control device of the mass-inertia balancing system of the test support device then controls at least the servo valve 33 based on the applied force, velocity, and acceleration to control the raising and lowering of the test model support component 60, ensuring that the applied force remains within the preset value during the control of the raising and lowering of the test model support component 60. Preferably, the force is made zero, that is, the force between the test model support component 60 and the test piece mounted on the test model support component 60 is close to 0, that is, there is basically no force between the test model support component 60 and the test piece.

[0041] In the mass-inertia balancing system of the test support device of the embodiment of the present invention, since it has a displacement sensor 81, a velocity and acceleration sensor 82, and a force sensor 83, it can control at least the servo valve 33 according to the applied force, velocity and acceleration, and then control the lifting and lowering of the test model support component 60 and make the applied force within a preset value. In this way, the mass and inertia of the test model support component 60 can be balanced, which also ensures that the mass and inertia of the test model support component 60 do not affect the model test.

[0042] In some embodiments of the present invention, the oil delivery pipe 21 is further provided with a pressure reducing valve 38. The accumulator 24 is connected to the oil delivery pipe 21 at the section between the pressure reducing valve 38 and the servo valve 33. The pressure reducing valve 38 is also connected to the oil return pipe 23. The pressure reducing valve 38 reduces the pressure to the required operating pressure. Each hydraulic cylinder oil pipe 22 is also connected to a safety valve 39, each safety valve 39 being connected to the oil return pipe 23 via an oil return branch pipe. The safety protection of the hydraulic cylinder 40 is achieved by setting the pressure of the safety valve 39. The safety valve 39 can be a direct-acting relief valve.

[0043] 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 70, 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 hydraulic cylinder 40 is a high-frequency double-acting servo hydraulic cylinder.

[0044] In some embodiments of the present invention, each hydraulic cylinder oil pipe 22 communicates with the corresponding oil chambers of two hydraulic cylinders 40 via two branch pipes 28. A shuttle valve 37 is disposed between the two branch pipes 28. The shuttle valve 37 communicates with the corresponding safety valve, thereby connecting each hydraulic cylinder oil pipe 22 to a safety valve. The provision of the shuttle valve 37 simplifies the overall oil circuit structure and facilitates control. The provision of the shuttle valve 37 also ensures that the pressures in the two corresponding oil chambers are equal, preventing a situation where one oil chamber has a higher pressure than the other, thereby facilitating synchronized and stable movement of the two hydraulic cylinders.

[0045] In some embodiments of the present invention, a first pressure sensor 51 is connected to the section of the oil pipeline 21 between the pressure reducing valve 38 and the servo valve 33. This sensor is used to detect the pressure of the oil pipeline 21 after it passes through the pressure reducing valve 38, also known as the oil inlet pressure. A second pressure sensor 53 is connected to the section of each branch pipe 28 between the oil chamber and the connection point of the shuttle valve 37. This second pressure sensor is used to detect the pressure in the oil chamber of the hydraulic cylinder 40. Two second pressure sensors 53 are provided, one to detect the pressure in the rodless chamber and the other in the rod chamber.

[0046] In some embodiments of the present invention, the mass inertia balancing system of the test support device further includes a guide rail clamp 55 and a clamp control valve 56. The clamp control valve 56 connects the oil pipeline 21, the guide rail clamp 55, and the oil return pipe 23 via a clamp pipeline 57. 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. The clamp control valve 56 is a three-way electromagnetic shut-off valve. There can be four guide rail clamps 55. A guide rail clamp control oil circuit pressure sensor 58 is connected to the clamp pipeline 57. The clamp pipeline 57 is connected to the oil pipeline 21 between the pressure reducing valve and the servo valve 33.

[0047] The present invention also provides a method for mass inertia balancing using the mass inertia balancing system of the test support device in any of the above embodiments, comprising:

[0048] Using the displacement sensor 81 to obtain position information;

[0049] Control the servo valve 33 according to the position information to move the test model support component 60 to a preset position;

[0050] Adjusting the test model support component 60 and the artificial flow field 70 in which the test piece mounted on the test model support component 60 is located;

[0051] The velocity and acceleration sensor 82 and the force sensor 83 are used to obtain the force, velocity and acceleration;

[0052] At least the servo valve 33 is controlled according to the force, speed and acceleration to control the lifting and lowering of the test model support member 60 , and the force is kept within a preset value when controlling the lifting and lowering of the test model support member 60 .

[0053] Specifically, in some embodiments of the present invention, before the flow field test begins, the test model support component 60 and the test piece on the test model support component 60 are both at the lowest position, parked on the lower limit buffer 66, the clamp control valve 56 loses power, and the guide rail clamp 55 is clamped.

[0054] Mass inertia balancing methods include:

[0055] Adjust the pressure of the two safety valves to the preset safety protection pressure.

[0056] The clamp control valve 56 is energized, releasing the guide rail clamp 55. Position information is acquired using the displacement sensor 81. Based on this position information, the servo valve 33 is controlled to move the test model support 60 and the test piece mounted thereon to a neutral position. After adjustment is complete, the clamp control valve 56 is de-energized, tightening the guide rail clamp 55 and waiting for the flow field 70 to adjust.

[0057] After the flow field 70 is adjusted, the clamp control valve 56 is energized, the guide rail clamp 55 is released, and the freedom of the heave motion is released.

[0058] The external flow field 70 is adjusted, causing the test model support member 60 to perform heave motion at different frequencies in the vertical direction along the heave motion guide rail 61. Simultaneously, the velocity and acceleration sensors and force sensor 83 are used to obtain the applied force, velocity, and acceleration. Based on the applied force, velocity, and acceleration, at least the servo valve 33 is controlled to control the raising and lowering of the test model support member 60. During this control, the applied force remains within a preset value.

[0059] When the system detects an abnormality or an emergency stop, the clamp control valve 56 loses power, locking the heaving motion in a short time.

[0060] When the flow field test is completed normally, the test model support component 60 and the tested object slowly descend to the lower limit position, the clamp control valve 56 loses power, and the heave motion is locked.

[0061] At this point, those skilled in the art should recognize that, although multiple 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 can be directly determined or deduced from the contents disclosed herein 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 inertia balancing system for a test support device, characterized in that: It includes oil delivery pipe, two hydraulic cylinder oil pipes, oil return pipe, hydraulic cylinder, heave motion guide rail and test model support components; The test model support component is mounted on the heave motion guide rail so as to be movable up and down. The output rod of the hydraulic cylinder is vertically arranged and connected to the test model support component. The outlets of the two hydraulic cylinder oil pipes are respectively connected to the two oil chambers of the hydraulic cylinder. The two hydraulic cylinder oil pipes are connected to the oil delivery pipe and the oil return pipe through a servo valve, and the servo valve is configured to connect one hydraulic cylinder oil pipe to the oil delivery pipe and the other hydraulic cylinder oil pipe to the oil return pipe; an accumulator is connected to the oil delivery pipe; The output rod is provided with a displacement sensor, and the test model support component is provided with a velocity and acceleration sensor; the test model support component is provided with a force sensor to detect the force between the test model support component and the test piece mounted on the test model support component; At least the servo valve is controlled according to the applied force, the speed, and the acceleration detected by the speed and acceleration sensors to control the lifting and lowering of the test model support component and keep the applied force within a preset value, thereby balancing the mass and inertia of the test model support component.

2. The mass inertia balancing system of the test support device according to claim 1, characterized in that: A safety valve is connected to the oil pipe of each hydraulic cylinder, and each safety valve is connected to the oil return pipe through an oil return branch pipe.

3. The mass inertia balancing system of the test support device according to claim 2, characterized in that: There are two hydraulic cylinders, which are respectively arranged on both sides of the test model support component; Each hydraulic cylinder oil pipe is connected to the corresponding oil chambers of the two hydraulic cylinders through two branch pipes. A shuttle valve is provided between the two branch pipes. The shuttle valve is connected to the corresponding safety valve so that the safety valve is connected to each hydraulic cylinder oil pipe.

4. The mass inertia balancing system for the test support device according to claim 1, characterized in that: It also includes a pressure reducing valve provided on the oil delivery pipe; the pressure reducing valve is also connected to the oil return pipe; The accumulator is connected to the oil pipeline between the pressure reducing valve and the servo valve; a first pressure sensor is connected to the section of the oil pipeline between the pressure reducing valve and the servo valve.

5. The mass inertia balancing system for the test support device according to claim 3, characterized in that: A second pressure sensor is connected to a pipeline of each branch pipe between the oil chamber and the connection point of the shuttle valve.

6. The mass inertia balancing system for the test support device according to claim 4, 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 pipe, the guide rail clamp and the oil return pipe through a clamp pipeline; The guide rail clamp is installed between the test model support component and the heave motion guide rail, and the guide rail clamp moves with the test model support component; The clamp pipeline is connected to a guide rail clamp control oil circuit pressure sensor; The clamp pipeline is connected to the oil delivery pipe between the pressure reducing valve and the servo valve.

7. The mass inertia balancing system for the test support device according to claim 1, characterized in that: The lower end of the cylinder body of the hydraulic cylinder is universally connected to the fixed base of the artificial flow field; the upper end of the output rod is universally connected to the test model supporting component.

8. The mass inertia balancing system for a test support device according to claim 1, characterized in that: 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.

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