CN101912823B - Vibrating table for centrifugal machine - Google Patents
Vibrating table for centrifugal machine Download PDFInfo
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- CN101912823B CN101912823B CN2010102421774A CN201010242177A CN101912823B CN 101912823 B CN101912823 B CN 101912823B CN 2010102421774 A CN2010102421774 A CN 2010102421774A CN 201010242177 A CN201010242177 A CN 201010242177A CN 101912823 B CN101912823 B CN 101912823B
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- reed
- platform
- vibrating table
- dividing plate
- moving coil
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Abstract
The invention relates to a vibrating table for a centrifugal machine, which comprises a stand. A vibrating table moving coil for generating vibrations and a test platform for a carrier belt to test workpieces are arranged on the stand, and the left end of the test platform is linked with the vibrating table moving coil through a platform push rod; the right end of the test platform is connected with a deviation correcting mechanism for preventing the vibrating table moving coil from excessively deviating on axial direction through a deviation correcting push rod; an aluminum frame of the vibrating table moving coil is provided with supporting mechanisms for preventing the moving coil from twisting or circumferentially rotating, convex edges are uniformly distributed on the aluminum frame, and one supporting mechanism is arranged between any two adjacent convex edges; each supporting mechanism comprises an axial spring installed on the convex edges along the axial direction of the moving coil and a radial spring installed along the radial direction of the moving coil to connect the axial spring and the aluminum frame; and the right end and the left end of the aluminum frame are both provided with radial springs. The invention has the advantages of correcting the deviation of a moving part in centrifugation environment and being directly used for the centrifugal machine.
Description
Technical field
The present invention relates to a kind of shake table, particularly a kind of shake table that can directly apply under the Centrifugal Environment.
Technical background
The fast development of China's Aero-Space cause has proposed more and more higher requirement to the reliability of space flight device.And the life-span of the inner various components and parts of space flight device is directly connected to the integrity problem of space flight device.These components and parts are carried out the test of reliability acceleration environment have important theory and practical significance.And the environmental test of single parameter can not comprehensive simulated space flight device components and parts working environment.For improving the precision of environmental test, must make up the multi-parameter compound environmental acceleration test system, and the coupling between combined environment testing and each environmental factor is studied.
Linear acceleration and vibration are compound to be the most frequently used combined environment testing system.Linear acceleration is realized by centrifuge that usually vibration is realized by shake table usually, realizes the compound of two factors on the centrifuge horn by shake table is installed in.Shake table being equipped with along arm on centrifuge installed and plumbing arm installation dual mode.For installing along arm, under action of centrifugal force, the moving component of shake table can laterally, axially depart from the equilbrium position, influence the operate as normal of shake table, can cause jigging platform moving coil stuck and burn in the time of seriously.Therefore, common shake table can not be directly used under the Centrifugal Environment.
Summary of the invention
At moving component under the Centrifugal Environment skew taking place and can't be directly used in shortcoming under the Centrifugal Environment for overcoming existing shake table, the invention provides a kind of skew of correcting moving component under Centrifugal Environment, can be directly used in the vibrating table for centrifugal machine under the Centrifugal Environment.
Vibrating table for centrifugal machine comprises
Frame, described frame is provided with vibrative jigging platform moving coil and is used to carry the test platform of workpiece to be tested, and the left end of described test platform is by platform push rod and described jigging platform moving coil interlock;
It is characterized in that: the right-hand member of described test platform connects one by correction push rod and stops the jigging platform moving coil deviation correction mechanism of over-deflection in the axial direction;
Peripheral being provided with stops moving-coil to take place circumferentially to reverse or the supporting mechanism of radial displacement on the aluminium frame of described jigging platform moving coil;
Described supporting mechanism comprises and frame leaf support affixed, that be hollow form, is installed on radially reed and axial reed on the leaf support, and connects radially reed and axially reed link reed, that be the T type;
In socket of described aluminium frame and the described leaf support, gapped between the outer wall of the inwall of described leaf support and described aluminium frame;
The outer surface of described leaf support is evenly distributed with fin, and the two ends of described axial reed are set up in respectively on the adjacent fin, and axially reed and described fin are affixed;
The montant portion of described reed link is axially fixed at the middle part of described axial reed along moving-coil, and the cross bar portion of described reed link and described radially reed are affixed;
The other end of described radially reed and described aluminium frame are affixed;
Left and right symmetrically is provided with two supporting mechanisms between the adjacent fin.
Further, described leaf support is regular prism shape, and the prismatic surface of described leaf support stretches out and forms described fin.
Further, the outer surface of described aluminium frame is provided with first boss that is connected with described radially reed, and described first boss is the regular prism adaptive with described leaf support; The right and left of described aluminium frame is respectively equipped with first boss.
Further, described deviation correction mechanism comprises: the dividing plate affixed with described correction push rod, lay respectively at the airtight hyperbaric chamber on both sides of described dividing plate and the hypobaric chamber that is communicated with atmosphere, be positioned at hyperbaric chamber and over against the displacement transducer of described dividing plate with the displacement of monitoring correction push rod; Described hyperbaric chamber and hypobaric chamber are fixed in described frame, and the output signal of described displacement transducer inputs in the controller;
Described hyperbaric chamber is provided with air intake that is communicated with high-pressure pump by the inflation magnetic valve and the gas outlet that is communicated with atmosphere by pressure-releasing electromagnetic valve, and described inflation magnetic valve and pressure-releasing electromagnetic valve are controlled by described controller;
Described hyperbaric chamber and hypobaric chamber are affixed, and the high pressure chest of hyperbaric chamber and the low-pressure cavity of hypobaric chamber interact by described dividing plate; Described dividing plate and described hyperbaric chamber are tightly connected by the ring packing film;
Described diaphragm seal comprises outer ring, inner ring and is connected the ring-shaped rubber film of inside and outside circle; The outer ring of described diaphragm seal compresses by the outer ring retainer ring and is fixed on the hypobaric chamber, and the inner ring of described diaphragm seal compresses by the inner ring retainer ring and is fixed on the described dividing plate.
Further, the center of described hyperbaric chamber is provided with the tapped through hole that described displacement transducer is installed, second boss that the inwall of described through hole extends to form a circle annulated column shape to the dividing plate direction, and described displacement transducer and described second boss are tightly connected.
Further, described displacement transducer and described second boss are connected and sealed by screw thread.
Further, described correction push rod and described dividing plate are one-body molded.
Further, described test platform is connected with described frame by a platform support, described platform support comprises the supporting spring two ends, the left and right sides of being fixed in described test platform, that extend along fore-and-aft direction and the free-ended reed installing rack of fixing described supporting spring; Described reed installing rack and described frame are affixed, and described supporting spring passes through the bolting of reed pressing plate on described reed installing rack.
Technical conceive of the present invention is: by axial reed and radially reed constitute the supporting mechanism of jigging platform moving coil, make only double vibrations vertically of jigging platform moving coil, radial vibration then is subjected to the restriction of supporting mechanism, anti-stopper ring radially moves or circumferentially reverses.
Supporting mechanism on two planes respectively four positions to the skew of moving-coil, oscillation crosswise such as reverse and retrain.When mounted, guaranteeing to strain the radially reed of each support unit under the coaxial prerequisite of moving-coil and air-gap field, relying on the torsional deflection of axial reed, radially the lever amplification of reed is realized following the moving-coil double vibrations.This supporting mechanism has the advantages that axial rigidity is little, radial rigidity is big, under the prerequisite of finishing the support of jigging platform moving coil, reduces the influence to moving component axial vibration.
Test platform is installed on the platform support by supporting spring.Use elastomeric material to come the manufacturing platform support, when push rod vibrates, platform support generation strain, and supporting spring plays the lever amplification, thus realize back and forth following of vibrating, and all the other frees degree of restriction test platform.
Right-hand member at test platform is provided with deviation correction mechanism, by in the dividing plate both sides are provided with, pressing different hyperbaric chamber and hypobaric chamber, as the correction power of correcting the shake table skew, make moving component get back to initial rest position with the pressure differential on dividing plate both sides, guarantee the shake table operate as normal.Correction power is by correction push rod, and platform, platform push rod are passed to jigging platform moving coil after tested, with balance vibration platform moving-coil and the suffered centrifugal force of correction force transmission member self.By the pressure differential of control hyperbaric chamber and hypobaric chamber, can adjust the size of correction power.
Boss is set on hyperbaric chamber, not only can realizes being tightly connected of displacement transducer and hyperbaric chamber, and boss also can limit the maximum offset of jigging platform moving coil, to guarantee safety.
The actual shifts displacement of the correction push rod of sensing when displacement transducer is greater than default when allowing maximum displacement, controller makes that the inflation magnetic valve is opened, pressure-releasing electromagnetic valve closes, in hyperbaric chamber, charge into high pressure gas, improve correction power, advance to until correction push rod and set in the allowed band.
The actual shifts displacement of the correction push rod of sensing when displacement transducer is less than default when allowing the least displacement amount, controller makes that the inflation magnetic valve is opened, pressure-releasing electromagnetic valve closes, portion gas is to reduce pressure reduction in the removal hyperbaric chamber, reduce correction power, until the correction push rod rollback to setting in the allowed band.
The correction medium that the present invention uses is air, and air is not only with low cost, and density is little, and the action of centrifugal force of experiencing certainly is little, and control is simple, and is effective.
The invention has the beneficial effects as follows: when overcoming the suffered centrifugal force of movement parts, do not influence the proper motion of shake table.Shake table after the improvement can be installed on the centrifuge horn along arm, constitutes centrifugal linear acceleration and vibration combined environment testing system.
Description of drawings
Fig. 1 is a profile schematic diagram of the present invention.
Fig. 2 is a cutaway view of the present invention.
Fig. 3 is the schematic diagram of moving-coil and test platform.
Fig. 4 is the schematic diagram that is connected with axial reed of reed radially.
Fig. 5 is the jigging platform moving coil schematic diagram.
Fig. 6 is the schematic diagram of leaf support.
Fig. 7 is the cutaway view that leaf support is connected with the aluminium frame.
Fig. 8 is the schematic diagram of test platform.
Fig. 9 is the schematic diagram of deviation correction mechanism.
Figure 10 is the schematic diagram of the diaphragm seal of deviation correction mechanism.
The specific embodiment
With reference to accompanying drawing, further specify the present invention:
Vibrating table for centrifugal machine comprises frame 1, and described frame 1 is provided with vibrative jigging platform moving coil 2 and is used to carry the test platform 3 of workpiece to be tested, and the left end of described test platform 3 is by platform push rod 4 and described jigging platform moving coil 2 interlocks;
The right-hand member of described test platform 3 connects one by correction push rod 5 and stops jigging platform moving coil 2 deviation correction mechanism 6 of over-deflection in the axial direction;
Peripheral being provided with stops moving-coil to take place circumferentially to reverse or the supporting mechanism 7 of radial displacement on the aluminium frame 21 of described jigging platform moving coil.
Described supporting mechanism 7 comprises and frame 1 leaf support 74 affixed, that be hollow form, is installed on radially reed 72 and axial reed 71 on the leaf support 74, and connects radially reed 72 and axially reed link 73 reed 71, that be the T type;
In described aluminium frame 21 sockets and the described leaf support 74, gapped between the outer wall of the inwall of described leaf support 74 and described aluminium frame 21;
The outer surface of described leaf support 74 is evenly distributed with fin 741, and the two ends of described axial reed 71 are set up in respectively on the adjacent fin 741, and axially reed 71 and described fin 741 are affixed;
The middle part of described axial reed 71 is fixed in vertically in the montant portion 731 of described reed link 73, and the cross bar portion 732 and the described radially reed 72 of described reed link 73 are affixed;
The other end of described radially reed 72 and described aluminium frame 21 are affixed;
Left and right symmetrically is provided with two supporting mechanisms 7 between the adjacent fin 741.
Described jigging platform moving coil comprises coiled wire-wound coil 22, epoxy matrix 23 and moving-coil aluminium frame 21.Described coiled wire-wound coil 22 is positioned at the winding slot of epoxy matrix 23, described epoxy matrix 23 and moving-coil aluminium frame 21 bondings.
Described leaf support 74 is regular prism shape, and the prismatic surface of described leaf support 74 stretches out and forms described fin 741.
The outer surface of described aluminium frame 21 is provided with first boss 211 that is connected with described radially reed 72, and described first boss 211 is the regular prism adaptive with described leaf support 74; The right and left of described aluminium frame 21 is respectively equipped with first boss 211.Each first boss can about, front and back ground installs four supporting mechanisms 7, and is corresponding with fin 741 on the leaf support 74 respectively.Moving-coil 2 vibrates in the hole of leaf support 741 under the support of eight supporting constructions 7.
Described deviation correction mechanism 6 comprises: the dividing plate 61 affixed with described correction push rod 5, lay respectively at the airtight hyperbaric chamber 62 on both sides of described dividing plate 61 and the hypobaric chamber 63 that is communicated with atmosphere, be positioned at hyperbaric chamber 63 and over against the displacement transducer 64 of described dividing plate 61 with the displacement of monitoring correction push rod 5; Described hyperbaric chamber 62 and hypobaric chamber 63 are fixed in described frame 1, and the output signal of described displacement transducer 64 inputs in the controller;
Described hyperbaric chamber 62 is provided with air intake that is communicated with high-pressure pump by the inflation magnetic valve and the gas outlet that is communicated with atmosphere by pressure-releasing electromagnetic valve, and described inflation magnetic valve and pressure-releasing electromagnetic valve are controlled by described controller;
Described hyperbaric chamber 62 and hypobaric chamber 63 are affixed, and the high pressure chest 621 of hyperbaric chamber 62 interacts by described dividing plate 61 with the low-pressure cavity 631 of hypobaric chamber 63; Described dividing plate 61 is tightly connected by ring packing film 65 with described hyperbaric chamber 62.
Described diaphragm seal 65 comprises outer ring 651, inner ring 652 and is connected the ring-shaped rubber film 653 of inside and outside circle 652,651; The outer ring 651 of described diaphragm seal 65 compresses by outer ring retainer ring 661 and is fixed on the hypobaric chamber 63, and the inner ring 652 of described diaphragm seal 65 compresses by inner ring retainer ring 662 and is fixed on the described dividing plate 61.
The center of described hyperbaric chamber 62 is provided with the tapped through hole that described displacement transducer 64 is installed, second boss 67 that the inwall of described through hole extends to form a circle annulated column shape to the dividing plate direction, and described displacement transducer and described second boss 67 are tightly connected.
Described displacement transducer 64 is connected and sealed by screw thread with described second boss 67.
Described correction push rod 5 and described dividing plate 61 are one-body molded.
Described test platform 3 is connected with described frame 1 by a platform support 8, described platform support 8 comprises the supporting spring 81 two ends, the left and right sides of being fixed in described test platform 3, that extend along fore-and-aft direction and the free-ended reed installing rack 82 of fixing described supporting spring 81; Described reed installing rack 82 and described frame 1 are affixed, and described supporting spring 81 passes through the bolting of reed pressing plate 83 on described reed installing rack 82.
Technical conceive of the present invention is: by axial reed 71 and radially reed 72 constitute the supporting mechanism of jigging platform moving coil 2, make only double vibrations vertically of jigging platform moving coil 2, radial vibration then is subjected to the restriction of supporting mechanism 7, and anti-stopper ring 2 radially moves or circumferentially reverses.
Supporting mechanism 7 on two planes respectively four positions to the skew of moving-coil, oscillation crosswise such as reverse and retrain.When mounted, guaranteeing to strain the radially reed 72 of each support unit under the coaxial prerequisite of moving-coil 2 and air-gap field, relying on the torsional deflection of axial reed 71, radially the lever amplification of reed 72 is realized following moving-coil 2 double vibrationses.This supporting mechanism 7 has the advantages that axial rigidity is little, radial rigidity is big, under the prerequisite of finishing the support of jigging platform moving coil, reduces the influence to moving component axial vibration.
Test platform 3 is installed on the platform support 82 by supporting spring 81.Use elastomeric material to come manufacturing platform support 82, when push rod vibrated, strain took place in platform support 82, and supporting spring 81 plays the lever amplification, thereby realized back and forth following of vibrating, and all the other frees degree of restriction test platform 3.
Right-hand member at test platform 3 is provided with deviation correction mechanism 6, by in dividing plate 61 both sides are provided with, pressing different hyperbaric chamber 62 and hypobaric chamber 63, as the correction power of correcting the shake table skew, make moving component get back to initial rest position with the pressure differential on dividing plate 61 both sides, guarantee the shake table operate as normal.Correction power is by correction push rod, and platform 3, platform push rod 4 are passed to jigging platform moving coil 2 after tested, with balance vibration platform moving-coil 2 and the suffered centrifugal force of correction force transmission member self.By the pressure differential of control hyperbaric chamber 62 and hypobaric chamber 63, can adjust the size of correction power.
The actual shifts displacement of the correction push rod of sensing when displacement transducer 64 5 is greater than default when allowing maximum displacement, controller makes that the inflation magnetic valve is opened, pressure-releasing electromagnetic valve closes, in hyperbaric chamber, charge into high pressure gas, improve correction power, advance to until correction push rod 5 and set in the allowed band.
The actual shifts displacement of the correction push rod of sensing when displacement transducer 64 5 is less than default when allowing the least displacement amount, controller is opened inflation closed electromagnetic valve, pressure-releasing electromagnetic valve, portion gas is to reduce pressure reduction in the removal hyperbaric chamber, reduce correction power, until correction push rod 5 rollbacks to setting in the allowed band.
The correction medium that the present invention uses is air, and air is not only with low cost, and density is little, and the action of centrifugal force of experiencing certainly is little, and control is simple, and is effective.
The described content of this specification embodiment only is enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also reach in those skilled in the art conceive according to the present invention the equivalent technologies means that can expect.
Claims (6)
1. vibrating table for centrifugal machine comprises frame, and described frame is provided with vibrative jigging platform moving coil and is used to carry the test platform of workpiece to be tested, and the left end of described test platform is by platform push rod and described jigging platform moving coil interlock;
It is characterized in that: the right-hand member of described test platform connects one by correction push rod and stops the jigging platform moving coil deviation correction mechanism of over-deflection in the axial direction;
Peripheral being provided with stops moving-coil to take place circumferentially to reverse or the supporting mechanism of radial displacement on the aluminium frame of described jigging platform moving coil;
Described supporting mechanism comprises and frame leaf support affixed, that be hollow form, is installed on radially reed and axial reed on the leaf support, and connects radially reed and axially reed link reed, that be the T type;
Described aluminium frame is socketed in the described leaf support, and is gapped between the outer wall of the inwall of described leaf support and described aluminium frame;
The outer surface of described leaf support is evenly distributed with fin, and the two ends of described axial reed are set up in respectively on the adjacent fin, and axially reed and described fin are affixed;
The montant portion of described reed link is axially fixed at the middle part of described axial reed along moving-coil, and the cross bar portion of described reed link and described radially reed are affixed;
The other end of described radially reed and described aluminium frame are affixed;
Two described axial reed left and right symmetricallies are arranged on the adjacent fin;
Described deviation correction mechanism comprises: the dividing plate affixed with described correction push rod, lay respectively at the airtight hyperbaric chamber on both sides of described dividing plate and the hypobaric chamber that is communicated with atmosphere, be positioned at hyperbaric chamber and over against the displacement transducer of described dividing plate with the displacement of monitoring correction push rod; Described hyperbaric chamber and hypobaric chamber are fixed in described frame, and the output signal of described displacement transducer inputs in the controller;
Described hyperbaric chamber is provided with air intake that is communicated with high-pressure pump by the inflation magnetic valve and the gas outlet that is communicated with atmosphere by pressure-releasing electromagnetic valve, and described inflation magnetic valve and pressure-releasing electromagnetic valve are controlled by described controller;
Described hyperbaric chamber and hypobaric chamber are affixed, and the high pressure chest of hyperbaric chamber and the low-pressure cavity of hypobaric chamber interact by described dividing plate; Described dividing plate and described hyperbaric chamber are tightly connected by the ring packing film;
Described diaphragm seal comprises outer ring, inner ring and is connected the ring-shaped rubber film of inside and outside circle; The outer ring of described diaphragm seal compresses by the outer ring retainer ring and is fixed on the hypobaric chamber, and the inner ring of described diaphragm seal compresses by the inner ring retainer ring and is fixed on the described dividing plate.
2. vibrating table for centrifugal machine as claimed in claim 1 is characterized in that: described leaf support is regular prism shape, and the prismatic surface of described leaf support stretches out and forms described fin.
3. vibrating table for centrifugal machine as claimed in claim 1 or 2 is characterized in that: the outer surface of described aluminium frame is provided with first boss that is connected with described radially reed, and described first boss is the regular prism adaptive with described leaf support; The right and left of described aluminium frame is respectively equipped with first boss.
4. vibrating table for centrifugal machine as claimed in claim 3, it is characterized in that: the center of described hyperbaric chamber is provided with the tapped through hole that described displacement transducer is installed, second boss that the inwall of described through hole extends to form a circle annulated column shape to the dividing plate direction, described displacement transducer and described second boss are tightly connected.
5. vibrating table for centrifugal machine as claimed in claim 4 is characterized in that: described displacement transducer and described second boss are connected and sealed by screw thread; Described correction push rod and described dividing plate are one-body molded.
6. vibrating table for centrifugal machine as claimed in claim 5, it is characterized in that: described test platform is connected with described frame by a platform support, described platform support comprises the supporting spring two ends, the left and right sides of being fixed in described test platform, that extend along fore-and-aft direction and the free-ended reed installing rack of fixing described supporting spring; Described reed installing rack and described frame are affixed, and described supporting spring passes through the bolting of reed pressing plate on described reed installing rack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102421774A CN101912823B (en) | 2010-08-02 | 2010-08-02 | Vibrating table for centrifugal machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102421774A CN101912823B (en) | 2010-08-02 | 2010-08-02 | Vibrating table for centrifugal machine |
Publications (2)
| Publication Number | Publication Date |
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| CN101912823A CN101912823A (en) | 2010-12-15 |
| CN101912823B true CN101912823B (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102421774A Expired - Fee Related CN101912823B (en) | 2010-08-02 | 2010-08-02 | Vibrating table for centrifugal machine |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102794235A (en) * | 2011-05-27 | 2012-11-28 | 中国水利水电科学研究院 | Vibrating table for centrifugal machine |
| CN104502210A (en) * | 2014-12-30 | 2015-04-08 | 天津福云天翼科技有限公司 | Centrifuge shaking table |
| CN106706245B (en) * | 2015-07-15 | 2019-08-06 | 北京卫星环境工程研究所 | Vibration-acceleration for spacecraft dynamics test couples environmental test system |
| CN106403794B (en) * | 2016-09-22 | 2020-03-24 | 浙江大学 | Device for dynamic and static calibration of eddy current sensor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10253480A (en) * | 1997-03-10 | 1998-09-25 | Matsushita Electric Ind Co Ltd | Shaking table for measuring unbalance |
| CN100408993C (en) * | 2004-02-02 | 2008-08-06 | 沈光新 | Simulated test platform system for mechanical structure vibration resistant performance |
| CN201832719U (en) * | 2010-08-02 | 2011-05-18 | 浙江大学 | Vibration table for centrifugal machine |
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| CN101912823A (en) | 2010-12-15 |
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