Load simulation test buffer device

Abstract

The invention discloses a load simulation test buffer device, and relates to the field of mechanical system test, the load simulation test buffer device comprises a base, a support, a load sensor and a buffer mechanism, the support is slidably mounted on the base, and the load sensor is arranged on one side of the support; the fixing sleeve is arranged on the other side of the support, the mandrel is slidably mounted on the fixing sleeve, one end of the mandrel is located in the fixing sleeve, a baffle is arranged at the end, close to the support, of the mandrel, the mandrel is sleeved with the first elastic assembly and located between the baffle and the fixing sleeve, and the mandrel is slidably sleeved with the back tightening sleeve and located on the side, away from the support, of the fixing sleeve. The second elastic assembly is arranged on the mandrel in a sleeving mode and located in the back tightening sleeve, the pre-tightening component is installed on the mandrel and located on the side, away from the support, of the back tightening sleeve, and a connecting piece is arranged at the end, away from the support, of the mandrel. The device solves the problem that the connection rigidity of the active execution mechanism and the tested part is too large, so that the loading performance of the tested part under the highly approximate actual load effect is examined in a laboratory environment.

Description

Technical Field

[0001] The invention relates to the field of mechanical system experiments and tests, and in particular to a load simulation test buffer device. Background Art

[0002] In the field of national defense, ships, civil engineering structural testing and other scientific research and product production processes, product performance is tested in accordance with national standards to ensure normal performance. For example, the servo is a classic actuator in the aerospace field, ships, and submarines, and is of great significance to the normal flight and control of the device. When the electro-hydraulic servo cylinder is used to test the seismic performance of structural components in civil engineering, the horizontal cylinder simulates the earthquake effect and the vertical cylinder simulates the gravity effect. It is the actuator in the entire loading system and is an indispensable loading device required for experimental teaching and various scientific research experiments.

[0003] The main task of the test is to apply load to the object to be tested, judge its actual working performance through various parameters related to the working performance of the product, estimate the load-bearing capacity of the steering gear or servo cylinder, determine the degree of compliance of the structure with the use requirements, provide a basis for structural optimization, safety and reliability evaluation in engineering design, and use it to test and develop the calculation theory of the structure. It can be seen from actual work that the measurement of test data is one of the key links in product inspection. Only by obtaining reliable test data can the correct test results be obtained through the test data and the expected purpose of the structural test be achieved. Only by analyzing the experimental data can the performance bottlenecks of the product be identified, and corresponding measures can be taken to improve the overall performance of the product and improve safety.

[0004] In the existing load simulation test device, the active actuator and the tested steering gear or servo cylinder are directly connected, and the lack of a buffer device in the middle causes excessive rigidity. During the full-load and full-stroke test, the active actuator cannot simulate the actual load, and the deviation is large. This is especially obvious when the load is converted between positive and negative (push and pull). The active actuator cannot simulate the real load in time, and the data deviation is large. At the same time, the active actuator is easy to lose control due to small deformation, causing irreversible damage, making it difficult to accurately evaluate the actual effect of product changes, resulting in product decisions based on errors, thereby affecting the iterative process of product improvement, investing resources in the wrong direction, and failing to truly improve the problems existing in the product. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a load simulation test buffer device, which solves the problem of excessive connection stiffness between the active actuator and the tested component, thereby realizing the assessment of the loading performance of the tested component under a highly approximate actual load in a laboratory environment.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a load simulation test buffer device, comprising a base, a support, a load sensor and a buffer mechanism, wherein the support is slidably mounted on the base, the load sensor is arranged on one side of the support, and the load sensor is used to be connected to an active actuator; the buffer mechanism comprises a core shaft, a fixed sleeve, a back-tightening sleeve, a first elastic component, a second elastic component and a pre-tightening component, the fixed sleeve is arranged on the other side of the support, the core shaft is slidably mounted on the fixed sleeve, one end of the core shaft is located in the fixed sleeve and is arranged close to one end of the support A baffle is provided, the first elastic component is sleeved on the core shaft and located between the baffle and the fixed sleeve, the back tightening sleeve is slidably sleeved on the core shaft and located on the side of the fixed sleeve away from the support, the second elastic component is sleeved on the core shaft and located in the back tightening sleeve, the pre-tightening component is installed on the core shaft and located on the side of the back tightening sleeve away from the support, a connecting piece is provided at one end of the core shaft away from the support, the connecting piece is used to connect with the component to be measured, and the axial direction of the core shaft is consistent with the sliding direction of the support.

[0008] Preferably, the base comprises a bottom plate and a guide mechanism, the guide mechanism is arranged on the upper part of the bottom plate, and a sliding mechanism is arranged on the lower part of the support, and the sliding mechanism is slidably mounted on the guide mechanism.

[0009] Preferably, the guiding mechanism comprises a plurality of guide rails parallel to each other, and the sliding mechanism comprises a plurality of sliding assemblies, each of the sliding assemblies being slidably mounted on one of the guide rails.

[0010] Preferably, each of the sliding assemblies comprises a plurality of sliders, and the plurality of sliders of each of the sliding assemblies are slidably mounted on one of the guide rails.

[0011] Preferably, the support includes a support plate and a mounting plate vertically arranged on the upper part of the support plate, the support plate is slidably mounted on the base, the load sensor is arranged on one side of the mounting plate, and the fixing sleeve is arranged on the other side of the mounting plate.

[0012] Preferably, the pre-tightening component is a pre-tightening nut, and the pre-tightening nut is threadedly connected to the core shaft.

[0013] Preferably, the core shaft includes a connected polished rod segment and a screw segment, the outer diameter of the polished rod segment is larger than the outer diameter of the screw segment, the baffle is provided at one end of the polished rod segment away from the screw segment, the pre-tightening nut includes a connected cylindrical segment and a threaded cylindrical segment, the threaded cylindrical segment is threadedly mounted on the screw segment, and the inner diameter of the cylindrical segment is larger than the outer diameter of the polished rod segment.

[0014] Preferably, the first elastic component is a first disc spring group, and the second elastic component is a second disc spring group.

[0015] Preferably, the first disc spring group and the second disc spring group are arranged opposite to each other.

[0016] Preferably, the connecting member is a connecting flange, and the connecting flange is fixedly sleeved on the core shaft.

[0017] Compared with the prior art, the present invention has achieved the following technical effects:

[0018] The buffer mechanism in the load simulation test buffer device of the present invention comprises a core shaft, a fixed sleeve, a back-tightening sleeve, a first elastic component, a second elastic component and a pre-tightening component, the core shaft is slidably mounted on the fixed sleeve, the first elastic component is sleeved on the core shaft and is located between the baffle and the fixed sleeve, the back-tightening sleeve is slidably sleeved on the core shaft and is located on the side of the fixed sleeve away from the support, the second elastic component is sleeved on the core shaft and is located in the back-tightening sleeve, and the pre-tightening component is mounted on the core shaft and is located on the side of the back-tightening sleeve away from the support. When in use, the second elastic component bears a flexible buffer when the tested component is subjected to thrust, and the first elastic component bears a flexible buffer when the tested component is subjected to tension. The problem of excessive connection stiffness between the active actuator and the component under test is solved by adopting a buffer mechanism, thereby realizing the evaluation of the loading performance of the component under test under a highly approximate actual load in a laboratory environment. In particular, when the load is converted between positive and negative (push and pull), the real load can be simulated in a timely manner with small data deviation. At the same time, it can avoid irreversible damage caused by loss of control of the active actuator due to excessive deformation, thereby accurately evaluating the actual effect of the change of the component under test and improving the component under test based on the problems found in the evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A three-dimensional structural diagram of the load simulation test buffer device provided by the present invention;

[0021] Figure 2 This is a diagram of the internal structure of the load simulation test buffer device provided by the present invention.

[0022] Explanation of the reference numerals: 100, load simulation test buffer device; 1, base plate; 2, guide rail; 3, slider; 4, support; 41, support plate; 42, mounting plate; 5, load sensor; 6, core shaft; 61, bare rod section; 62, screw rod section; 7, fixing sleeve; 8, back-tightening sleeve; 9, pre-tightening nut; 91, cylinder section; 92, threaded cylinder section; 10, baffle; 11, first disc spring group; 12, second disc spring group; 13, connecting flange; 14, loading cylinder. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The purpose of the present invention is to provide a load simulation test buffer device, which solves the problem of excessive connection stiffness between the active actuator and the tested component, thereby realizing the evaluation of the loading performance of the tested component under a highly approximate actual load in a laboratory environment.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1-Figure 2 As shown, this embodiment provides a load simulation test buffer device 100, including a base, a support 4, a load sensor 5 and a buffer mechanism, the support 4 is slidably mounted on the base, the load sensor 5 is arranged on one side of the support 4, the load sensor 5 is used to connect with the active actuator, and the load applied by the active actuator is measured by using the load sensor 5; the buffer mechanism includes a core shaft 6, a fixed sleeve 7, a back tightening sleeve 8, a first elastic component, a second elastic component and a pre-tightening component, the fixed sleeve 7 is arranged on the other side of the support 4, the core shaft 6 is slidably mounted on the fixed sleeve 7, one end of the core shaft 6 is located in the fixed sleeve 7 and a baffle 10 is arranged on the end close to the support 4, the core shaft 6 The other end of the sleeve passes through the fixed sleeve 7 and extends to the outside. The first elastic component is sleeved on the core shaft 6 and is located between the baffle 10 and the fixed sleeve 7, that is, the first elastic component is arranged on the side of the baffle 10 away from the support 4. The back-tightening sleeve 8 is slidably sleeved on the core shaft 6 and is located at the end of the fixed sleeve 7 away from the support 4. The second elastic component is sleeved on the core shaft 6 and is located in the back-tightening sleeve 8. The pre-tightening component is installed on the core shaft 6 and is located on the side of the back-tightening sleeve 8 away from the support 4. The pre-tightening component can contact the back-tightening sleeve 8 to apply a pre-tightening force. A connecting piece is provided at one end of the core shaft 6 away from the support 4. The connecting piece is used to connect with the component to be measured. The axial direction of the core shaft 6 is consistent with the sliding direction of the support 4.

[0027] The active actuator in this embodiment is the piston rod of the loading cylinder 14, and the central axis of the core shaft 6 is arranged colinearly with the central axis of the piston rod of the loading cylinder 14. The tested component is a tested steering gear or a tested servo cylinder.

[0028] During use, when the power output end of the measured component is extended, the piston rod of the loading cylinder 14 applies a thrust to it, and during this process the second elastic component carries the flexible buffer; when the power output end of the measured component is contracted, the piston rod of the loading cylinder 14 applies a pulling force to it, and during this process the first elastic component carries the flexible buffer.

[0029] Specifically, the base includes a bottom plate 1 and a guide mechanism, the guide mechanism is arranged on the upper part of the bottom plate 1, and a sliding mechanism is arranged on the lower part of the support 4, and the sliding mechanism is slidably installed on the guide mechanism.

[0030] In order to ensure the stability of sliding, the guide mechanism includes a plurality of mutually parallel guide rails 2, the length direction of the guide rails 2 is consistent with the axial direction of the core shaft 6, and the sliding mechanism includes a plurality of sliding components, each of which is slidably mounted on a guide rail 2. In this embodiment, the guide mechanism includes two mutually parallel guide rails 2.

[0031] Each sliding assembly includes a plurality of sliders 3, and the plurality of sliders 3 of each sliding assembly are slidably mounted on one guide rail 2. In this embodiment, each sliding assembly includes two sliders 3.

[0032] The support 4 includes a support plate 41 and a mounting plate 42 vertically arranged on the upper part of the support plate 41. The support plate 41 is slidably mounted on the base. In this embodiment, the slider 3 is arranged at the lower part of the support plate 41, and the slider 3 is slidably mounted on the guide rail 2. The load sensor 5 is arranged on one side of the mounting plate 42, and the fixing sleeve 7 is arranged on the other side of the mounting plate 42.

[0033] The pre-tightening component in this embodiment is a pre-tightening nut 9, which is threadedly connected to the core shaft 6. The pre-tightening nut 9 contacts the back tightening sleeve 8 to apply a pre-tightening force, and the pre-tightening nut 9 is screwed to move on the core shaft 6, so that the distance between the pre-tightening nut 9 and the baffle 10 changes, so as to adjust the pre-tightening force. Specifically, the pre-tightening nut 9 controls the torque to apply the pre-tightening force according to the parameters of the first elastic component and the second elastic component and the tonnage of the measured component.

[0034] Specifically, the core shaft 6 includes a connected smooth rod segment 61 and a screw segment 62, the outer diameter of the smooth rod segment 61 is larger than the outer diameter of the screw segment 62, and a baffle 10 is provided at one end of the smooth rod segment 61 away from the screw segment 62. The pre-tightening nut 9 includes a connected cylindrical segment 91 and a threaded cylindrical segment 92, the threaded cylindrical segment 92 is threadedly installed on the screw segment 62, and the inner diameter of the cylindrical segment 91 is larger than the outer diameter of the smooth rod segment 61.

[0035] In the present embodiment, a limiting step is formed between the smooth rod section 61 and the screw rod section 62 of the core shaft 6, and the limiting step can limit the threaded barrel section 92 of the pre-tightening nut 9, thereby preventing the pre-tightening force from being too large due to the distance between the pre-tightening nut 9 and the baffle 10 being too small, thereby preventing the first elastic component and the second elastic component from being unable to play a buffering role due to the excessive pre-tightening force.

[0036] The first elastic component in this embodiment is the first disc spring group 11. The elastic properties of the first disc spring group 11 can vary within a wide range. Specifically, the first disc spring group 11 includes a plurality of first disc springs arranged in sequence. Buffering of different loads can be achieved by increasing or decreasing the number of first disc springs or changing the specifications of the first disc springs.

[0037] The second elastic component in this embodiment is a second disc spring group 12. The elastic properties of the second disc spring group 12 can vary within a wide range. Specifically, the second disc spring group 12 includes a plurality of second disc springs arranged in sequence. Buffering of different loads can be achieved by increasing or decreasing the number of second disc springs or changing the specifications of the second disc springs.

[0038] Specifically, the first disc spring group 11 and the second disc spring group 12 are arranged opposite to each other.

[0039] The first disc spring and the second disc spring have large stiffness and strong buffering and vibration absorbing capabilities, and can withstand large loads with small deformations. At the same time, they have variable stiffness characteristics, and different characteristic curves can be obtained by properly selecting the ratio of the deformation and thickness of the disc spring when flattened, thereby meeting the testing requirements of different tonnages.

[0040] The connecting piece in this embodiment is a connecting flange 13, and the connecting flange 13 is fixedly sleeved on the core shaft 6. Specifically, the connecting flange 13 is threadedly connected to the screw section 62 of the core shaft 6.

[0041] The load simulation test buffer device 100 in this embodiment has a simple structure and low cost. All bearing components are made of national standard parts. The installation of the tested component is more convenient, and the tonnage required by the load is highly applicable. When in use, the second elastic component bears a flexible buffer when the tested component is subjected to thrust, and the first elastic component bears a flexible buffer when the tested component is subjected to tension. The problem of excessive connection stiffness between the active actuator and the tested component is solved by adopting a buffer mechanism, thereby achieving the evaluation of the loading performance of the tested servo cylinder or the tested steering gear under a highly approximate actual load in a laboratory environment, especially when the load is positive and negative (push-pull) conversion, it can timely simulate the real load, the data deviation is small, and at the same time, it can avoid the active actuator from losing control due to too small deformation and causing irreversible damage, and then accurately evaluate the actual effect of the change of the tested component, so as to improve the tested component according to the problems obtained in the evaluation, and buffer the load of any curve, such as sine wave, square wave, function special curve, etc.

[0042] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A load simulation test buffer device, characterized in that: It includes a base, a support, a load sensor and a buffer mechanism, the support is slidably mounted on the base, the load sensor is arranged on one side of the support, and the load sensor is used to be connected to an active actuator; the buffer mechanism includes a mandrel, a fixed sleeve, a back-tightening sleeve, a first elastic component, a second elastic component and a pre-tightening component, the fixed sleeve is arranged on the other side of the support, the mandrel is slidably mounted on the fixed sleeve, one end of the mandrel is located in the fixed sleeve and a baffle is arranged at one end close to the support, the first elastic component is sleeved on the mandrel and located between the baffle and the fixed sleeve, the back-tightening sleeve is slidably sleeved on the mandrel and located on a side of the fixed sleeve away from the support, the second elastic component is sleeved on the mandrel and located in the back-tightening sleeve, the pre-tightening component is mounted on the mandrel and located on a side of the back-tightening sleeve away from the support, a connecting piece is arranged at one end of the mandrel away from the support, the connecting piece is used to be connected to the measured component, and the axial direction of the mandrel is consistent with the sliding direction of the support.

2. The load simulation test buffer device according to claim 1, characterized in that: The base comprises a bottom plate and a guide mechanism, wherein the guide mechanism is arranged on the upper part of the bottom plate, and a sliding mechanism is arranged on the lower part of the support, and the sliding mechanism is slidably mounted on the guide mechanism.

3. The load simulation test buffer device according to claim 2, characterized in that: The guiding mechanism comprises a plurality of guide rails parallel to each other, and the sliding mechanism comprises a plurality of sliding assemblies, each of which is slidably mounted on one of the guide rails.

4. The load simulation test buffer device according to claim 3, characterized in that: Each of the sliding components comprises a plurality of sliding blocks, and the plurality of sliding blocks of each of the sliding components are slidably mounted on one of the guide rails.

5. The load simulation test buffer device according to claim 1, characterized in that: The support comprises a support plate and a mounting plate vertically arranged on the upper part of the support plate, the support plate is slidably mounted on the base, the load sensor is arranged on one side of the mounting plate, and the fixing sleeve is arranged on the other side of the mounting plate.

6. The load simulation test buffer device according to claim 1, characterized in that: The pre-tightening component is a pre-tightening nut, and the pre-tightening nut is threadedly connected to the core shaft.

7. The load simulation test buffer device according to claim 6, characterized in that: The core shaft includes a connected polished rod segment and a screw segment, the outer diameter of the polished rod segment is larger than the outer diameter of the screw segment, the baffle is provided at one end of the polished rod segment away from the screw segment, the pre-tightening nut includes a connected cylindrical segment and a threaded cylindrical segment, the threaded cylindrical segment is threadedly mounted on the screw segment, and the inner diameter of the cylindrical segment is larger than the outer diameter of the polished rod segment.

8. The load simulation test buffer device according to claim 1, characterized in that: The first elastic component is a first disc spring group, and the second elastic component is a second disc spring group.

9. The load simulation test buffer device according to claim 8, characterized in that: The first disc spring group and the second disc spring group are arranged opposite to each other.

10. The load simulation test buffer device according to claim 1, characterized in that: The connecting piece is a connecting flange, and the connecting flange is fixedly sleeved on the core shaft.

Images