CN115389148B - Four-comprehensive vibration test system - Google Patents
Four-comprehensive vibration test system Download PDFInfo
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- CN115389148B CN115389148B CN202211322144.XA CN202211322144A CN115389148B CN 115389148 B CN115389148 B CN 115389148B CN 202211322144 A CN202211322144 A CN 202211322144A CN 115389148 B CN115389148 B CN 115389148B
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention provides a four-comprehensive vibration test system, and relates to the technical field of environment simulation test equipment. The four-comprehensive vibration test system comprises a vibration table body, a test box, a balance assembly and a positioning assembly. The test box is internally provided with test bed components, the balance components are at least provided with two and are arranged at intervals around the circumference of the test bed components, and the balance components are connected between the test bed components and the test box so as to enable the test bed components to be in a balance state under test pressure; the positioning assembly is at least provided with two and is arranged between the test bed assembly and the test box at intervals around the circumference of the test bed assembly, and the positioning assembly is suitable for applying acting force opposite to the elastic force to the test bed assembly so as to enable the test bed assembly to be in a balanced state under normal pressure. The invention can solve the problems that the working table surface of the air-cooled vibration table in the prior art is unbalanced under the test air pressure, and the vibration table can not work normally, so that the four-comprehensive vibration system can work normally in the low-air pressure or high-air pressure environment.
Description
Technical Field
The invention relates to the technical field of environmental simulation test equipment, in particular to a four-comprehensive vibration test system.
Background
The four-comprehensive vibration test system is widely applied at present, and is particularly suitable for equipment tests in positive and negative pressure environments in the operation processes of aviation, aerospace and the like. The four-comprehensive vibration test system can realize the test of the vibration table under various different combined environments of vibration, temperature, humidity and low pressure. In order to realize different air pressure environments, the air pressure in the test chamber needs to be changed through a vacuum pump or an air compressor, and the scheme is generally suitable for the water-cooled vibrating table. Although a plurality of water-cooled four-comprehensive test systems are available on the market, the water-cooled vibration table is high in cost, and the air-cooled vibration table low in cost is suitable for the market law.
For the air-cooled vibration table, when the cooling fan is cooled by a method of downward air draft and upward air intake, the inside of the whole table body is at normal pressure. Therefore, when the air pressure in the test box changes, the pressure difference between the test box and the vibration table body changes, and the balance position of the moving coil is further influenced, so that the vibration table cannot work normally.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects that the air-cooled vibration table in the prior art has unbalanced working table surface and can not work normally due to the change of air pressure in a test box, thereby providing a four-comprehensive vibration test system.
In order to solve the problems, the invention provides a four-comprehensive vibration test system which comprises a vibration table body, a test box, a balance assembly and a positioning assembly. The test box is arranged on the vibration table body, and a first mounting hole is formed in the bottom of the test box; a test bed assembly is arranged in the test box, and the test bed assembly downwards movably penetrates through the first mounting hole to be connected with the vibrating table body; the balance assembly is at least provided with two balance assemblies which are arranged at intervals around the circumference of the test bed assembly, each balance assembly comprises an elastic piece, each elastic piece is connected between the test bed assembly and the test box, and the elastic pieces are suitable for applying elastic force in the vertical direction to the test bed assembly when the air pressure in the test box changes, so that the test bed assembly is in a balance state under the test pressure; the positioning assembly is at least provided with two, is arranged between the test bed assembly and the test box at intervals around the circumferential direction of the test bed assembly, is detachably connected with the test bed assembly, and is suitable for applying acting force opposite to elastic force to the test bed assembly so as to enable the test bed assembly to be in a balanced state under normal pressure.
Optionally, the test bed component comprises a test bed surface and a transition head; the transition head comprises a transition main body arranged along the axial direction of the first mounting hole, the transition main body is movably sleeved in the first mounting hole, the upper end of the transition main body is connected with the test table board, and the lower end of the transition main body is connected with the vibrating table body.
Optionally, the transition head further comprises a supporting convex edge horizontally and convexly arranged on the upper portion of the transition main body, the first end of the elastic piece is connected with the supporting convex edge, and the second end of the elastic piece is connected with the bottom wall of the test box.
Optionally, the second end of the elastic member is connected with the bottom wall of the test chamber through the adjusting assembly; the adjusting assembly comprises an adjusting hole formed in the bottom wall of the test box and an adjusting rod in threaded connection with the adjusting hole, the upper end of the adjusting rod is connected with the second end of the elastic piece, and the lower end of the adjusting rod is in adjustable locking connection with the adjusting hole through an adjusting nut after penetrating through the adjusting hole.
Optionally, the lower end of the adjusting hole is expanded to form an annular groove, a thrust bearing is sleeved on the adjusting rod and arranged in the annular groove, and the adjusting nut is abutted to the thrust bearing.
Optionally, the elastic member comprises a tension spring; the locating component comprises a locating rod with external threads, the bottom wall of the test box is provided with a locating hole with internal threads, the locating rod is in threaded connection with the locating hole, and the locating hole is penetrated out of the upper end of the locating rod and is suitable for being abutted to and supporting the test bed component.
Optionally, the elastic member includes a pressure spring, the positioning assembly includes a positioning rod with an external thread, the bottom wall of the test chamber is provided with a first connection hole with an internal thread, and the lower part of the positioning rod is in threaded connection with the first connection hole; the test bed assembly is provided with a second connecting hole with an internal thread, and the upper end of the positioning rod is in threaded connection with the second connecting hole.
Optionally, the test box and the test bed assembly are hermetically connected through a sealing assembly.
Optionally, the sealing assembly comprises a sealing cover, the sealing cover is detachably arranged at the bottom of the test box, the first mounting hole is formed in the sealing cover, the balancing assembly is arranged between the sealing cover and the test bed assembly, and the positioning assembly is arranged between the sealing cover and the test bed assembly.
Optionally, an annular sealing ring is connected between the test bed assembly and the sealing cover, the lower edge of the sealing ring is connected with the sealing cover, the upper edge of the sealing ring is connected with the test bed assembly, and the sealing ring seals the inner cavity of the test box in an isolated manner from the outside.
The invention has the following advantages:
1. by utilizing the technical scheme of the invention, through arranging the balance assembly, when the air pressure of the elastic part in the balance assembly in the test box is changed, the elastic force in the vertical direction is applied to the test bed assembly; through setting up locating component, locating component can exert the effort opposite with the elastic force to the test bench subassembly to make the test bench subassembly be in balanced state under the ordinary pressure. Under test pressure, the test bed component is in a balanced state by adjusting the elastic piece, the positioning component is adjusted, and the position of the test bed component under the test pressure is recorded. Because there is not pressure differential inside and outside the proof box under ordinary pressure, provide the power opposite with the elastic force through the locating component, make the test bench subassembly keep in balanced position. When experimental, reach experimental atmospheric pressure in the proof box, the inside and outside production pressure differential of proof box, simultaneously, remove locating component, owing to having removed locating component, the elastic force of elastic component has compensated the power that the pressure differential that the test bench subassembly received produced to make the proof box under experimental atmospheric pressure, the test bench still is in balanced state, has realized the normal test work of four combined vibration systems under low atmospheric pressure or high atmospheric pressure environment.
2. Through setting up seal assembly, with test bench subassembly and proof box sealing connection, the accurate atmospheric pressure of adjusting in the proof box of being convenient for provides the test condition of vibration, temperature, humidity and the multiple different combination environment of low atmospheric pressure or high atmospheric pressure for the shaking table body.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a four-integrated vibration testing system according to an embodiment of the present invention;
FIG. 2 shows a schematic structural view of the test stand assembly of FIG. 1;
FIG. 3 shows an enlarged view of the structure at A in FIG. 1;
FIG. 4 shows an enlarged view of the structure at B in FIG. 3;
FIG. 5 shows an enlarged view of the structure at C in FIG. 3;
FIG. 6 shows a schematic view of one construction of the adjustment lever;
FIG. 7 is a schematic view of a connection structure between the positioning assembly and the test bed assembly when the elastic member is a compression spring;
FIG. 8 shows an enlarged view of the structure at D in FIG. 7;
fig. 9 shows a schematic view of the structure of the adjustment lever of fig. 7.
Description of reference numerals:
1. a vibrating table body; 2. a test chamber; 3. a test stand assembly; 31. a test table; 32. a transition head; 321. a transition body; 322. supporting the convex edge; 4. a balancing component; 41. an elastic member; 411. a tension spring; 412. a pressure spring; 42. a fixing component; 421. a first bolt; 422. a first fixed seat; 423. fixing a sleeve; 424. a locknut; 425. a fixed shaft; 43. an adjustment assembly; 431. an adjustment hole; 432. adjusting a rod; 4321. a torque transmission joint; 4322. a pull ring; 433. a thrust bearing; 434. adjusting the nut; 435. a second fixed seat; 436. a second bolt; 5. a positioning assembly; 51. positioning a rod; 52. positioning holes; 6. a seal assembly; 61. a sealing cover; 62. a seal ring; 63. an O-shaped ring; 7. a support frame assembly; 8. a vibration table support; 9. a second mounting hole; 10. a third mounting hole; 20. and a moving coil assembly.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
For convenience of describing the technical solution of the present invention, the following detailed description is made with reference to the accompanying drawings and specific examples, but the examples should not be construed as limiting the present invention.
Example 1
A four-comprehensive vibration test system, referring to fig. 1-5, comprises a vibration table body 1, a test box 2, a balance assembly 4 and a positioning assembly 5. The test box 2 is arranged on the vibration table body 1, and a first mounting hole is formed in the bottom of the test box 2; a test bed component 3 is arranged in the test box 2, and the test bed component 3 can downwards movably penetrate through the first mounting hole to be connected with the vibration table body 1; at least two balance assemblies 4 are arranged and are arranged at intervals around the circumference of the test bed assembly 3; the balance assembly 4 comprises an elastic member 41, the elastic member 41 is connected between the test bed assembly 3 and the test chamber 2, and the elastic member 41 is suitable for applying elastic force in the vertical direction to the test bed assembly 3 when the air pressure in the test chamber 2 changes, so that the test bed assembly 3 is in a balance state under the test pressure; the positioning assembly 5 is at least provided with two, and is arranged between the test bed assembly 3 and the test box 2 at intervals around the circumference of the test bed assembly 3, the positioning assembly 5 is detachably connected with the test bed assembly 3, and the positioning assembly 5 is suitable for applying an acting force opposite to the elastic force to the test bed assembly 3 so that the test bed assembly 3 is in a balanced state under normal pressure.
By utilizing the technical scheme of the invention, through arranging the balance assembly 4, when the air pressure in the test box 2 changes, the elastic part 41 in the balance assembly 4 applies elastic force in the vertical direction to the test bed assembly 3; through setting up locating component 5, locating component 5 can exert the effort opposite with the elastic force to test bench subassembly 3 to make test bench subassembly 3 be in balanced state under the ordinary pressure. Under the test pressure, the test bed assembly 3 is in a balance state by adjusting the elastic piece 41, the positioning assembly 5 is adjusted, and the position of the test bed assembly 3 under the test pressure is recorded. Because there is no pressure difference between the inside and outside of the test chamber 2 under normal pressure, and the positioning assembly 5 provides a force opposite to the elastic force, the test bed assembly 3 is kept at the balance position. When experimental, reach experimental atmospheric pressure in the proof box 2, experimental atmospheric pressure is including being different from the low pressure state or the high-pressure state of ordinary pressure, the inside and outside pressure differential that produces of proof box 2, and simultaneously, remove locating component 5, owing to having removed locating component 5, the elastic force of elastic component 41 has compensated the power that the pressure differential that test bench subassembly 3 received produced, thereby make proof box 2 under experimental atmospheric pressure, the test bench still is in balanced state, the normal test work of four combined vibration systems under low pressure or high atmospheric pressure environment has been realized.
It should be noted that the test pressure is an extreme pressure state, including a low pressure and a high pressure. When the test pressure is low pressure, the pressure in the test chamber is less than the external atmospheric pressure. Because the up end of test bench subassembly is located the proof box, and the lower terminal surface of test bench subassembly is located outside the proof box, and when test pressure was the low pressure, the pressure that the lower terminal surface of test bench subassembly received was greater than the pressure that the up end of test bench subassembly received. When the test pressure is high pressure, the pressure of the test box is greater than the external atmospheric pressure, that is, the pressure applied to the lower end face of the test bed assembly is smaller than the pressure applied to the upper end face of the test bed assembly.
Specifically, referring to fig. 1, the four-comprehensive vibration test system further includes a vibration table support 8, and the vibration table body 1 is mounted on the vibration table support 8. The supporting frame assembly 7 is connected above the vibrating table body 1, and specifically, the test box 2 is connected with the supporting frame assembly 7. The shaking table body 1 includes moving coil subassembly 20, and test bench subassembly 3 is connected with the shaking table body 1, specifically does, and test bench subassembly 3 is connected with moving coil subassembly 20.
Alternatively, referring to fig. 2, the test stand assembly 3 includes a test stand 31 and a transition head 32; the transition head 32 comprises a transition main body 321 arranged along the axial direction of the first mounting hole and a supporting convex edge 322 arranged on the upper part of the transition main body 321 in a horizontal convex mode, the transition main body 321 is movably sleeved in the first mounting hole, the upper end of the transition main body 321 is connected with the test table board 31, and the lower end of the transition main body 321 is connected with the vibration table body 1.
Specifically, first mounting hole is the circular port, and the structure and the first mounting hole adaptation of transition head 32 perform as, and transition main part 321 is one end open-ended tubular structure, and the up end of transition main part 321 seals the inboard of locating proof box 2, for the face of action of experimental pressure, the outside of proof box 2 is located to the lower terminal surface of transition main part 321, for the face of action of external atmospheric pressure. The support ledge 322 is an annular ledge disposed around the outer periphery of the transition body 321.
Specifically, in this embodiment, the supporting ledge 322 is disposed at the upper end of the transition main body 321, and the upper end surface of the supporting ledge 322 is flush with the upper end surface of the transition main body 321.
The test table 31 is connected with the upper end face of the transition body 321. Referring to fig. 1, test table 31 and support ledge 322 are both located in the inner cavity of test chamber 2. Specifically, the outer diameter of the supporting flange 322 is larger than the inner diameter of the first mounting hole. Accordingly, support ledge 322 is located in the interior cavity of test chamber 2 and may cover the first mounting hole. The lower end of the transition main body 321 is connected with the vibrating table body 1 after passing through the first mounting hole, specifically, the lower end of the transition main body 321 is connected with the support frame assembly 7. The transition main body 321 has a diameter smaller than that of the first mounting hole, and a movable gap is left between the transition main body 321 and the inner wall of the first mounting hole. The vibration of the vibration table body 1 is transmitted to the test table surface 31 through the supporting component and the transition head 32.
Referring to fig. 3, balance assembly 4 and positioning assembly 5 are each provided between the bottom wall of test chamber 2 and support ledge 322 at intervals around the circumference of test stand assembly 3.
Alternatively, a first end of elastic member 41 is connected to support ledge 322, and a second end of elastic member 41 is connected to the bottom wall of test chamber 2. The elastic member 41 includes a spring, in this embodiment, the spring is a tension spring 411, and is suitable for the working state of the test chamber 2 in which the inner cavity is at low pressure.
Optionally, the second end of the elastic element 41 is connected to the bottom wall of the test chamber 2 by an adjustment assembly 43; referring to fig. 3 and 4, the adjusting assembly 43 includes an adjusting hole 431 formed in the bottom wall of the test chamber 2 and an adjusting rod 432 threadedly coupled to the adjusting hole 431, the upper end of the adjusting rod 432 is coupled to the second end of the elastic member 41, and the lower end of the adjusting rod 432 passes through the adjusting hole 431 and is adjustably fastened to the adjusting hole 431 by an adjusting nut 434.
Optionally, the lower end of the adjusting hole 431 is expanded to form an annular groove, the adjusting rod 432 is sleeved with a thrust bearing 433, the thrust bearing 433 is arranged in the annular groove, and the adjusting nut 434 abuts against the thrust bearing 433.
When operating the adjusting assembly 43, when rotating the adjusting nut 434, by applying an external force to the adjusting rod 432, for example, fixing with a wrench, the adjusting rod 432 is prevented from rotating, and the adjusting nut 434 drives the adjusting rod 432 to move up and down by virtue of the thrust bearing 433, thereby driving the extension spring 411 to move in a vertical direction in a telescopic manner.
As a specific embodiment, referring to fig. 6, a torque transmission joint 4321 capable of being engaged with a wrench is provided at a lower end of the adjustment rod 432, and specifically, the torque transmission joint 4321 is a prism.
Optionally, the lower end of the tension spring 411 is connected to the upper end of the adjusting rod 432. Further, in order to facilitate connection with the tension spring 411, referring to fig. 6, a pull ring 4322 is provided at an upper end of the adjustment lever 432.
Optionally, the upper end of the tension spring 411 is connected to the supporting ledge 322 via the fixing component 42.
Specifically, referring to fig. 5, the fixing assembly 42 includes a first fixing seat 422 and a first bolt 421, the first fixing seat 422 and the supporting flange 322 are both provided with a threaded connection hole, and the first fixing seat 422 and the supporting flange 322 are fixedly connected through the first bolt 421. The hole wall of the threaded connection hole of the first fixing seat 422 extends to one side to form a connection arm, two shaft holes which are oppositely arranged are formed in the connection arm, and a fixing shaft 425 penetrates through the shaft holes. In this embodiment, the fixing shaft 425 is a bolt, at least one of the two shaft holes is a threaded hole, and the bolt passes through the two shaft holes and is locked and connected by the locknut 424. The upper end of the tension spring 411 is threaded on the bolt between the two shaft holes.
In order to avoid the shaking of the tension spring 411 in the vibration process, an annular limiting groove is formed in the fixing shaft 425, and the upper end of the tension spring 411 is embedded in the limiting groove.
As a specific embodiment, the fixing shaft 425 is sleeved with a fixing sleeve 423, and the limiting groove is formed on the fixing sleeve 423. Further, the fixing sleeve 423 is made of nylon.
Optionally, the elastic member 41 includes a tension spring 411; referring to the test bed assembly 3, the positioning assembly 5 comprises a positioning rod 51 with external threads, a positioning hole 52 with internal threads is formed in the bottom wall of the test box 2, the positioning rod 51 is in threaded connection with the positioning hole 52, and the upper end of the positioning rod 51 penetrates through the positioning hole 52 and is suitable for abutting and supporting the test bed assembly 3. When the positioning rod 51 rotates, the height of the upper end of the positioning rod 51 extending out of the bottom wall of the test box 2, that is, the distance between the test bed assembly 3 and the bottom wall of the test box 2, specifically, the distance between the lower end face of the support convex edge 322 of the transition head 32 and the bottom wall of the test box 2, can be adjusted. When the test box 2 is in a low-pressure state, a pressure difference exists between the inside and the outside of the test box 2, namely, a pressure difference exists between the upper end face and the lower end face of the transition head, at this time, the tension spring 411 is used for compensating the pressure difference, when the test bed component 3 is adjusted to be in a balanced state, the positioning component 5 is used for calibrating the position of the test bed component 3 in the balanced state. The pressure difference acting on the transition head 32 due to the pressure difference between the inside and the outside of the test chamber 2 is: f = Δ PS, the tension of the tension spring 411 is adjusted to be F, so that the pressure difference can be compensated, and under normal pressure, since the transition head 32 is subjected to the downward tension of the tension spring 411, the positioning assembly 5 needs to be arranged, and the test table 31 is supported by the positioning rod 51 therein, so that the test table 31 is prevented from descending due to the tension of the tension spring 411, and the test table 31 and the vibration table body 1 are prevented from being damaged.
It can be understood that, according to F = Δ PS, the larger the cross-sectional area of the transition head 32, the more it is stressed, the greater the stiffness K of the tension spring 411 is required, and the smaller the practical displacement of the test table 31 or the transition head 32 that can be used.
Optionally, the test chamber 2 and the test bed assembly 3 are hermetically connected through a sealing assembly 6.
Optionally, the sealing assembly 6 includes a sealing cover 61, the sealing cover 61 is detachably disposed at the bottom of the test box 2, the first mounting hole is opened in the sealing cover 61, the balancing assembly 4 is disposed between the sealing cover 61 and the test bed assembly 3, and the positioning assembly 5 is disposed between the sealing cover 61 and the test bed assembly 3.
Optionally, an annular sealing ring 62 is connected between the test bed component 3 and the sealing cover 61, the lower edge of the sealing ring 62 is connected with the sealing cover 61, the upper edge of the sealing ring 62 is connected with the test bed component 3, and the sealing ring 62 seals the inner cavity of the test box 2 in an isolated manner from the outside.
Through setting up seal assembly 6, with test bench subassembly 3 and proof box 2 sealing connection, be convenient for accurate atmospheric pressure in adjusting proof box 2, for the shaking table body 1 provides the test condition of vibration, temperature, humidity and the multiple different combination environment of low atmospheric pressure or high atmospheric pressure.
Optionally, the sealing assembly 6 further includes an O-ring, and specifically, the adjusting rod 432 and the adjusting hole 431 are hermetically connected through the O-ring 63 sleeved on the adjusting rod 432.
The upper part of the test chamber 2 is provided with a second mounting hole 9 for connecting an environmental device and a third mounting hole 10 for connecting an air extractor or an inflator. The environment device is used for adjusting the temperature and the humidity in the test box 2, the air exhaust device or the air charging device is used for adjusting the air pressure in the test box 2, the air exhaust device is used for providing a low-pressure environment for the inner cavity of the test box 2, and the air charging device is used for providing a high-pressure environment for the inner cavity of the test box 2.
The specific operation process comprises the following steps:
the position of the lower surface of the transition head 32 is determined according to the position of the test table surface 31 when the moving coil of the vibration table body 1 is balanced, the positioning rod 51 is adjusted to abut against the supporting convex edge 322 of the transition head 32, the height is calibrated to be a balanced position, and the positioning rod 51 is responsible for supporting the transition head 32 under normal pressure, so that the transition head 32 is ensured not to move downwards when a piece to be tested is installed, and the vibration table is prevented from being damaged. The air suction device connected through the third mounting hole reduces the air pressure in the test box 2, when the air pressure in the test box 2 is reduced, the transition head 32 moves upwards under the action of the external atmospheric pressure, at the moment, the adjusting rod 432 is adjusted to change the length of the tension spring 411, the transition head 32 is pulled to the balance position, then the positioning rod 51 is removed, and the test table top 31 is located at the balance position. The environmental device who connects through second mounting hole 9 controls temperature and humidity in the proof box 2, and the air exhaust device who connects through third mounting hole 10 adjusts the atmospheric pressure in the proof box 2, provides the vibration through the vibration stage body 1 to realize low pressure, temperature, humidity, four integrated environment's of vibration test condition.
Example 2
Referring to fig. 7, in the present embodiment, the difference from embodiment 1 is that the elastic member 41 is a compression spring 412, the positioning assembly 5 includes a positioning rod 51 with an external thread, the bottom wall of the test chamber 2 is provided with a first connection hole with an internal thread, and the lower part of the positioning rod 51 is in threaded connection with the first connection hole; the test bed assembly 3 is provided with a second connecting hole with an internal thread, and the upper end of the positioning rod 51 is in threaded connection with the second connecting hole. This solution is suitable for the case of high pressure inside the test chamber 2.
Specifically, referring to fig. 7, the fixing assembly 42 includes a second fixing seat 435 and a second bolt 436, the second fixing seat 435 and the supporting flange 322 are respectively provided with a threaded connection hole, and the second fixing seat 435 and the supporting flange 322 are fixedly connected by the second bolt 436. The second fixing holder 435 has a first pressing surface, which abuts against one end of the pressure spring 412, and presses down the pressure spring 412. Referring to fig. 8, the second fixing seat 435 is provided with an annular limiting groove, and the upper end of the pressing spring 412 is embedded in the limiting groove. Of course, in some other embodiments, a first guiding column is protruded from the first pressing surface, and the upper end of the pressing spring 412 is sleeved on the first guiding column and abuts against the first pressing surface.
In this embodiment, referring to fig. 9, the lower end of the adjusting rod 432 is provided with a screw and a torque transmission joint 4321, and the connection and adjustment methods are the same as those in embodiment 1. The upper end of the adjusting rod 432 is provided with a second pressing surface, a second limiting column is arranged on the second pressing surface in a protruding mode, and the lower end of the pressure spring 412 is sleeved on the second limiting column and is abutted to the second pressing surface. Of course, in some other embodiments, the second pressing surface is provided with an annular limiting groove, and the lower end of the pressing spring 412 is embedded in the limiting groove.
Because the difference between the air pressure inside the test chamber 2 and the air pressure outside the test chamber 2 is positive, that is, the downward pressure applied to the transition head 32 is greater than the upward pressure applied to the transition head, the pressure spring 412 can apply an upward force to the transition head 32 to compensate the difference of the forces caused by the pressure difference, so that the transition head 32 is in a balanced state when the inside of the test chamber 2 is in a high-pressure environment. Under normal pressure, the transition head 32 is subjected to the upward elastic force of the compression spring 412, so that the transition head 32 needs to be connected with the positioning rod 51 to provide an equal amount of downward pulling force for the transition head 32, so that the transition head 32 is in a balanced state under the normal pressure state.
The operation is substantially the same as that of example 1 except that the inner chamber of test chamber 2 is pressurized by the inflator attached to the third mounting hole to provide a high pressure environment.
According to the above description, the present patent application has the following advantages:
1. through the arrangement of the balance component 4, when the air pressure in the test box 2 changes, the elastic part 41 in the balance component 4 applies the elastic force in the vertical direction to the test bed component 3, and compensates the force generated by the pressure difference applied to the test bed component 3, so that the test bed is still in a balanced state under the test air pressure of the test box 2, and the normal test work of the four-comprehensive vibration system under the low-air pressure or high-air pressure environment is realized;
2. through setting up seal assembly 6, with test bench subassembly 3 and proof box 2 sealing connection, the accurate atmospheric pressure of adjusting in the proof box 2 of being convenient for provides the test condition of vibration, temperature, humidity and the multiple different combination environment of low pressure for the shaking table body 1.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A four-in-one vibration testing system, comprising:
a vibration table body (1);
the test box (2) is arranged on the vibration table body (1), and a first mounting hole is formed in the bottom of the test box (2); a test bed component (3) is arranged in the test box (2), and the test bed component (3) downwards movably penetrates through the first mounting hole to be connected with the vibration table body (1);
at least two balance assemblies (4) are arranged and are arranged at intervals around the circumference of the test bed assembly (3); the balance assembly (4) comprises an elastic member (41), the elastic member (41) is connected between the test bed assembly (3) and the test box (2), and the elastic member (41) is suitable for applying elastic force in a vertical direction to the test bed assembly (3) when the air pressure in the test box (2) is changed so as to enable the test bed assembly (3) to be in a balance state under test pressure;
the positioning assemblies (5) are arranged at least two and are arranged between the test bed assembly (3) and the test box (2) at intervals around the circumferential direction of the test bed assembly (3), the positioning assemblies (5) are detachably connected with the test bed assembly (3), and the positioning assemblies (5) are suitable for being connected with the test bed assembly (3) under the normal pressure state during non-test and applying an acting force opposite to the elastic force to the test bed assembly (3) so as to enable the test bed assembly (3) to be in a balanced state under the normal pressure; and removed under extreme pressure conditions during testing.
2. The quaternary vibration testing system of claim 1, characterized in that said test stand assembly (3) comprises a test table top (31) and a transition head (32); the transition head (32) comprises a transition main body (321) which is arranged along the axial direction of the first mounting hole, the transition main body (321) is movably sleeved in the first mounting hole, the upper end of the transition main body (321) is connected with the test table board (31), and the lower end of the transition main body (321) is connected with the vibration table body (1).
3. The four-piece vibration testing system according to claim 2, wherein the transition head (32) further comprises a supporting ledge (322) horizontally and convexly disposed on the upper portion of the transition body (321), a first end of the elastic member (41) is connected with the supporting ledge (322), and a second end of the elastic member (41) is connected with the bottom wall of the test box (2).
4. A four-in-one vibration testing system according to any of claims 1 to 3, characterized in that the second end of said elastic member (41) is connected to the bottom wall of said test chamber (2) by means of an adjustment assembly (43); the adjusting assembly (43) comprises an adjusting hole (431) formed in the bottom wall of the test box (2) and an adjusting rod (432) in threaded connection with the adjusting hole (431), the upper end of the adjusting rod (432) is connected with the second end of the elastic piece (41), and the lower end of the adjusting rod (432) penetrates through the adjusting hole (431) and then is adjustably and tightly connected to the adjusting hole (431) through an adjusting nut (434).
5. The four-in-one vibration test system according to claim 4, wherein the lower end of the adjusting hole (431) is expanded to form an annular groove, a thrust bearing (433) is sleeved on the adjusting rod (432), the thrust bearing (433) is arranged in the annular groove, and the adjusting nut (434) is abutted against the thrust bearing (433).
6. A four-in-one vibration testing system according to any of claims 1-3, wherein said elastic member (41) comprises a tension spring (411); the positioning assembly (5) comprises a positioning rod (51) with external threads, a positioning hole (52) with internal threads is formed in the bottom wall of the test box (2), the positioning rod (51) is in threaded connection with the positioning hole (52), and the upper end of the positioning rod (51) penetrates through the positioning hole (52) and is suitable for being abutted to and supporting the test bed assembly (3).
7. The four-in-one vibration test system according to any one of claims 1 to 3, wherein the elastic member (41) comprises a compression spring (412), the positioning assembly (5) comprises a positioning rod (51) with an external thread, the bottom wall of the test box (2) is provided with a first connecting hole with an internal thread, and the lower part of the positioning rod (51) is in threaded connection with the first connecting hole; the test bed assembly (3) is provided with a second connecting hole with an internal thread, and the upper end of the positioning rod (51) is in threaded connection with the second connecting hole.
8. A four-in-one vibration testing system according to any of claims 1-3, wherein the test chamber (2) and the test bed assembly (3) are sealingly connected by a sealing assembly (6).
9. The four-in-one vibration test system according to claim 8, wherein the sealing assembly (6) comprises a sealing cover (61), the sealing cover (61) is detachably arranged at the bottom of the test box (2), the first mounting hole is formed in the sealing cover (61), and the balancing assembly (4) and the positioning assembly (5) are arranged between the sealing cover (61) and the test bed assembly (3).
10. A four-in-one vibration testing system according to claim 9, characterized in that an annular sealing ring (62) is connected between the test bed assembly (3) and the sealing cover (61), the lower edge of the sealing ring (62) is connected with the sealing cover (61), the upper edge of the sealing ring (62) is connected with the test bed assembly (3), and the sealing ring (62) seals the inner cavity of the test chamber (2) from the outside.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211322144.XA CN115389148B (en) | 2022-10-27 | 2022-10-27 | Four-comprehensive vibration test system |
| PCT/CN2023/107701 WO2024087744A1 (en) | 2022-10-27 | 2023-07-17 | Four-environmental-factors combined vibration testing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211322144.XA CN115389148B (en) | 2022-10-27 | 2022-10-27 | Four-comprehensive vibration test system |
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| Publication Number | Publication Date |
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| CN115389148A CN115389148A (en) | 2022-11-25 |
| CN115389148B true CN115389148B (en) | 2023-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211322144.XA Active CN115389148B (en) | 2022-10-27 | 2022-10-27 | Four-comprehensive vibration test system |
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| Country | Link |
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| CN (1) | CN115389148B (en) |
| WO (1) | WO2024087744A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115389148B (en) * | 2022-10-27 | 2023-02-10 | 苏州东菱振动试验仪器有限公司 | Four-comprehensive vibration test system |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2024087744A1 (en) | 2024-05-02 |
| CN115389148A (en) | 2022-11-25 |
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