NL2031733B1 - A load measuring device for freezing test in low temperature environment test chamber - Google Patents

A load measuring device for freezing test in low temperature environment test chamber Download PDF

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Publication number
NL2031733B1
NL2031733B1 NL2031733A NL2031733A NL2031733B1 NL 2031733 B1 NL2031733 B1 NL 2031733B1 NL 2031733 A NL2031733 A NL 2031733A NL 2031733 A NL2031733 A NL 2031733A NL 2031733 B1 NL2031733 B1 NL 2031733B1
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temperature environment
low temperature
base
environment test
test chamber
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NL2031733A
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NL2031733A (en
Inventor
Zhang Yongjie
Zhang Yunhui
Cui Bo
Luo Guisen
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Univ Northwestern Polytechnical
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
    • G01N17/002—Test chambers

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  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Environmental Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

The invention provides a loading measuring device for ice test of low temperature environment test box, including a base fixed on the outer‘ wall of the low—temperature environment test box, on which a slide rail is fixed horizontally,the slide rail is slidably connected with the sliding platform, and the side wall of the slide table is fixed with a force meter, and the force meter is connected with one end of the connecting piece,The other end of the connector is connected with the tested part located inside the low temperature environment test chamber through the operating hole opened on the low temperature environment test box;The base is also fixed with a feeding mechanism for driving the slide table and the dynamometer to slide horizontally along the sliding track synchronously. The force meter is applied, to the tested, part located inside the low temperature environment test box through the connecting piece.

Description

P1338/NLpd
A LOAD MEASURING DEVICE FOR FREEZING TEST IN LOW TEMPERATURE
ENVIRONMENT TEST CHAMBER
Technical Field
The invention relates to the technical field of low tempera- ture environmental testing apparatus, in particular to a loading measuring device for ice test of low temperature environment test box.
Background Technology
Aircraft, polar navigation ships, marine platforms and so on will face ice problems when they are used. The icing problem will pose a great harm to flight safety and navigation safety. The cold ice test can explore the ice mechanism and ice damage of aircraft and polar vessels, effectively reduce the damage caused by icing of aircraft and polar vessels, and improve the safety of aircraft and polar vessels.The low temperature environment test chamber can simulate the low temperature icing test environment, which allows us to explore the icing conditions of aircraft and polar ships in a variety of low temperature environments in the laboratory envi- ronment.
At present, when loading and testing, most of the test pieces need to be transferred out of the low-temperature environment test chamber, which will lead to large errors in the test results.A few test pieces whose size and shape meet the requirements of the ex- isting low-temperature loading and testing equipment can be loaded and tested at low temperature in the low-temperature environment test equipment, but the existing low-temperature loading and test- ing equipment has a single loading mode and can carry out less simulated working conditions.Moreover, the loading and testing de- vice often occupies part of the space in the low-temperature envi- ronment test equipment because of its complex structural design to ensure that it can work normally in the low-temperature environ- ment.The low-temperature environment test equipment with small volume has small available space and inconvenient operation. The low-temperature environment test equipment with large volume has the problems of slow loading process and low test efficiency.
Summary of the Invention
The purpose of the invention is to provide a loading measur- ing device for the icing test of the low-temperature environment test chamber, which is installed outside the low-temperature envi- ronment test equipment, does not occupy the internal space of the low-temperature environment test chamber, and is not affected by the internal temperature field of the low-temperature environment test chamber. It has simple structure, high precision, can measure a variety of test pieces, and has a wide range of application.
The technical scheme of the invention is:
A loading measuring device for icing test of low temperature environment test chamber, comprising:
The base is fixed on the outer wall of the low temperature environment test chamber;
A slide rail horizontally fixed on the base;
A slide table slidably connected with the slide rail;
A dynamometer fixed on the side wall of the sliding table;
One end of the connecting piece is connected with the dyna- mometer, and the other end is connected with the tested piece in- side the low-temperature environment test chamber through the op- eration hole opened on the low-temperature environment test cham- ber;
The feeding mechanism is fixed on the base to drive the slid- ing table and the dynamometer to slide horizontally along the sliding rail synchronously, and the dynamometer applies load to the tested part located in the low-temperature environment test chamber through the connector.
The feeding mechanism includes:
The stepping motor is vertically mounted on the right side of the base;
A bearing seat vertically fixed on the left side of the base;
A support seat fixed on one side of the upper surface of the base close to the mounting seat of the stepping motor;
The ball screw is placed horizontally, and its left end is connected with the bearing seat fixed on the left side of the base through a bearing, and its right end is connected with the support seat fixed on the right side of the base through a bearing;
A ball nut sleeved on the outside of the ball screw and con- nected with the ball screw thread;The sliding table is fixed on the outside of the ball nut;
The stepping motor is fixed on the side of the mounting seat of the stepping motor, its output shaft is connected with the right end of the ball screw through a coupling, and the stepping motor is also electrically connected with the power supply.
The stepping motor is connected with the stepping motor driv- er through wires, and the stepping motor driver is also connected with the power supply and the motor controller through wires re- spectively.
The above dynamometer is at the same height as the tested part located in the low temperature environment test chamber.
The sliding table is a cuboid structure, the interior of which is provided with a through hole for fixing the ball nut, the lower surface of the sliding table is fixed with a sliding strip, and the sliding strip is slidably connected with the sliding rail.
The beneficial effects of the invention: 1. For the low-temperature icing test, the current test meth- od usually needs to open the door of the low-temperature test box for operation. Due to the large difference between the internal and external temperature environment of the low-temperature envi- ronment test box, the test result error will be large. The inven- tion can carry out the test directly outside the box, so it can avoid the error caused by environmental change. 2. The existing low-temperature loading and measuring equip- ment needs to be designed for low-temperature icing resistance, so the equipment has a large volume and complex structure. Because the device is tested outside the low-temperature environment test box, it does not need to be designed for low-temperature icing re- sistance. Its main body is composed of stepping motor and lead screw slide, with simple structure and high reliability. 3. The existing low-temperature icing loading and measuring device is usually in the low-temperature environment test box. Due to the need of low-temperature resistant design, the structure is complex and the volume is large. At the same time, it occupies the test space in the equipment, the operable space is small, and there are requirements for the size and shape of the tested parts.The main body of the device is outside the equipment, is not affected by the temperature field inside the low-temperature envi- ronment test chamber, does not occupy the space in the equipment, and can measure a variety of test pieces. 4. The existing low-temperature icing loading and testing de- vices are mostly fixed in the low-temperature environment test box, and the low-temperature loading and measurement method is single; The device can carry out loading and measurement operation through stepping motor control, and can also change the loading and measurement mode by changing the position of loading equip- ment. The device can test a variety of mechanical properties by changing the connection mode between dynamometer and test piece. 5. The existing low-temperature icing loading and testing de- vice has the advantages of long lcading and debugging time, low efficiency, fixed loading measurement accuracy and range, and lim- ited testing range and working conditions.The device adopts the design of the combination of stepping motor and lead screw slide, which can accurately control the loading rate and stroke of the dynamometer. The structure is simple and reliable, and can ensure the loading and measurement accuracy.The loading range and measur- ing range of the device can also be changed by replacing the dyna- mometer according to the test requirements. 6. Most of the existing low-temperature environment icing loading and testing technologies carry out the icing process and loading measurement process of the test piece separately. After the icing test is completed, the test piece needs to be trans- ferred from the low-temperature environment test chamber to the test bench, resulting in large errors in the loading and measure- ment results.If the position of the test piece on the low- temperature chamber is not changed, the corresponding test results will not be obtained.
Description of attached drawings
Fig. 1 is a schematic diagram of the overall structure of the invention.
Fig. 2 is a structural diagram of the working principle of the invention.
Fig. 3 is a structural diagram of the matching of the ball screw and the slide table of the invention. 5 Fig. 4 is a schematic diagram of the structural plane of the connection between the ball screw and the slide table of the in- vention.
Fig. 5 is a structural diagram of the mounting base of the stepping motor of the invention.
Fig. 6 is a structural diagram of the bearing seat of the in- vention.
Fig. 7 is a side view of the feed mechanism of the present invention.
Description of reference marks: 1. base; 2. Bearing pedestal;3. Mounting base of stepping mo- tor;4. Bearing;5. Support seat;6. Slide rail;7. Slide;8. Lead screw;9. Coupling;10. Stepping motor;11. Stepper motor driver;12.
Power supply, 13, stepper motor controller, 14, dynamometer;15.
Low temperature environment test chamber;16. Test piece;17. Test bench;18. Connectors;19. Operating hole;20. Ball nut.
Specific implementation mode
A specific embodiment of the invention will be described in detail below in combination with figs. 1 to 7, but it should be understood that the protection scope of the invention is not lim- ited by the specific embodiment.
Example 1:
As shown in Fig. 1 and Fig. 2, the embodiment of the inven- tion provides a loading measuring device for the icing test of the low-temperature environment test chamber, including a base 1 fixed on the outer wall of the low-temperature environment test chamber 15, a slide rail 6 is horizontally fixed on the base 1, the slide rail 6 is slidably connected with the slide table 7, a dynamometer 14 is fixed on the side wall of the slide table 7, and the dyna- mometer 14 is connected with one end of the connecting piece 18,The other end of the connector 18 passes through the operation hole 19 opened on the low-temperature environment test chamber 15 and is connected with the tested part 16 located inside the low-
temperature environment test chamber 15;The base 1 is also fixed with a feed mechanism, which is used to drive the slide table 7 and the dynamometer 14 to slide horizontally along the slide rail 6 synchronously. The dynamometer 14 applies a load to the tested part 16 located inside the low temperature environment test cham- ber 15 through the connector 18.
Further, as shown in Fig. 2, the dynamometer 14 is at the same height as the tested piece 16 located inside the low tempera- ture environment test chamber 15.
The invention is integrally fixed on the outer wall of the low-temperature environment test chamber 15 and is only connected with the tested part 16 located inside the low-temperature envi- ronment test chamber 15 through the connector 18.Because the in- vention is installed outside the low-temperature environment test box 15, it does not need to carry out low-temperature resistance design, which is conducive to reducing the structural complexity of the device, reducing the volume of the device, and facilitating disassembly and installation. It is suitable for a variety of low- temperature environment test boxes 15, does not occupy the inter- nal space of the low-temperature environment test box 15, and can measure a variety of test pieces.
Example 2:
This embodiment is based on embodiment 1. As shown in Fig. 3, the feeding mechanism includes stepping motor mounting seat 3, bearing seat 2, support seat 5, ball screw 8, ball nut 20 and stepping motor 10.Fig. 5 shows the specific structure of the step- ping motor mounting base 3, which is vertically fixed on the right side of the base 1.As shown in Fig. 6, the specific structure of bearing pedestal 2 is fixed on the left side of the base 1, and the support seat 5 is fixed on the upper surface of the base 1 near the side of the stepping motor mounting seat 3;The ball screw 8 is horizontally placed, and the left end of the ball screw 8 is connected with the bearing seat 2 fixed on the left side of the base 1 through the bearing, and the right end is connected with the support seat 5 fixed on the right side of the base 1 through the bearing.As shown in Fig. 4, the outer sleeve of the ball screw 8 is provided with a ball nut 20 connected with its thread, and the outer side of the ball nut 20 is also fixedly connected with the sliding table 7;The step motor 10 is fixed on the side of the stepping motor mounting base 3, and its output shaft is connected with the right end of the ball screw 8 through coupling 9, and the step motor 10 is also electrically connected with the power supply 12.
Further, the step motor 10 is connected with the stepper mo- tor driver 11 through a wire, and the step motor driver 11 is also connected with the power supply 12 and the motor controller 13 re- spectively through the wire.
Further, the slide table 7 is a rectangular structure, and a through hole is arranged inside the slide table 7 for fixing the ball nut 20, the lower surface of the slide table 7 is fixed with a sliding strip, and the sliding strip is slided and connected with the slide rail &.
As shown in Fig. 7, the side view of the feed mechanism of the invention is shown. The right side of the base 1 of the inven- tion is vertically fixed with the stepping motor mounting base 3, the stepping motor is installed on the stepping motor mounting base 3 by bolts, the left side of the base 1 is vertically fixed with the bearing seat 2, and the upper surface of the base 1 is fixed with a support seat 5 on the side close to the stepping mo- tor mounting seat 3,The support seat 5 is fixed on the base 1 by bolts, which is close to the three installation seats of the step- ping motor. Bearing pedestal 2 and support seat 5 are installed with the same dimension bearing 4 at the same height. On the base 1 between the support seat 5 and the bearing pedestal 2, two par- allel slideways 6 are fixed by bolts. The lower surface of slide platform 7 is fixed with sliding strip, and the sliding strip is connected with slide rail 6;0ne end of ball screw 8 is fixed by bearing 4 on bearing pedestal 2, one end is fixed by bearing on support seat 5, slide 7 is fixed with ball nut 20 through internal fixation, ball nut 20 is connected with ball screw 8 thread, step motor 10 is fixed on the side of stepping motor mounting base 3 by screws, coupling 9 connects screw 8 and stepping motor 10,The step motor 10 is driven by the stepper motor driver 11 through the wire, the step motor driver 11 connects the power supply 12 and the motor controller 13 through the wire, and the force meter 14 is fixed on the sliding table 7 by bolts.
The working principle of the invention is as follows:
The main body of the device is outside the low temperature test equipment, and the test piece 16 in the low-temperature envi- ronment test box is connected with the force meter 14 outside the box through the connecting piece 18. Through the cooperation of the screw 8 and the sliding table 7, the force meter 14 will move horizontally under the driving of the stepping motor 10, so as to complete the loading and measurement of the test piece 16;
Before the test, select the force gauge 14 and connecting piece 18 that meet the requirements, assemble the device, then ad- just the device position to make it in the horizontal state, ad- just the height of the device, so that the dynamometer 14 is at the same height as the test piece 16 used. Through the operation hole 19, connect the test piece 16 with the dynamometer 14, and turn on the switch of the force meter 14,The force gauge 14 is manually reset to zero by step motor controller 13, and the stroke and speed of the force gauge 14 are set.During the test, press the step motor controller 13 switch, and step motor 10 enters the au- tomatic operation stage. Driven by the stepping motor 10, the force meter 14 moves horizontally. At this time, the force meter 14 will display the applied force in real time. Combined with the displacement of the force meter 14, the stress-strain curve of the tested part 16 can be obtained.
In conclusion, the invention provides a loading measuring de- vice for freezing test of low-temperature environment test box, which is installed outside the low-temperature environment test equipment, does not occupy the internal space of the low- temperature environment test box, and is not affected by the tem- perature field inside the low-temperature environment test box. It has simple structure and high precision, and can measure various test pieces, and has a wide range of applications.
The above disclosure is only several specific embodiments of the invention, but the embodiments of the invention are not lim- ited to this, and any changes that can be thought by those skilled in the art shall fall into the protection scope of the invention.

Claims (5)

CONCLUSIESCONCLUSIONS 1. Belastingsmeetapparaat voor ijsvormingstest van testkamer voor lage temperatuuromgeving, met het kenmerk, dat het omvat: Basis (1), bevestigd aan de buitenwand van de testkamer voor lage temperatuuromgeving (15}; Schuifrail (6), horizontaal bevestigd op de bovengenoemde basis (1); Schuiftafel (7), schuifverbinding met de bovengenoemde schuifrail (6); Rollenbank (14), bevestigd aan de zijwand van de bovengenoemde schuiftafel (7); Verbindingsstuk (18), waarvan het ene uiteinde is verbonden met de bovengenoemde rollenbank (14), het andere uiteinde gaat door het bedieningsgat (19) dat is geopend op de testkamer voor lage tempe- ratuuromgeving {15) en sluit aan het geteste monster (16) in de testkamer voor lage temperatuuromgeving (15); Toevoermechanisme, bevestigd op de bovengenoemde basis (1) voor het aandrijven van de schuiftafel (7) en de rollenbank (14) die synchroon horizontaal langs de schuifrail worden gegleden (6), de rollenbank (14) belast via het bovengenoemde verbindingsstuk (18) naar het geteste monster (16) in de testkamer voor lage tempera- tuur (15).1. Load measuring device for icing test of low temperature environment test chamber, characterized in that it comprises: Base (1), attached to the outer wall of the low temperature environment test chamber (15}; Slide rail (6), fixed horizontally on the above base ( 1); Slide table (7), sliding connection with the above slide rail (6); Dynamometer (14), attached to the side wall of the above slide table (7); Connecting piece (18), one end of which is connected with the above dynamometer ( 14), the other end passes through the operating hole (19) opened on the low temperature environment test chamber {15) and connects to the tested sample (16) in the low temperature environment test chamber (15); Feeding mechanism, mounted on the above base (1) for driving the sliding table (7) and the dynamometer (14) sliding synchronously horizontally along the slide rail (6), the dynamometer (14) loaded through the above-mentioned connecting piece (18) to the tested sample (16) in the low temperature test chamber (15). 2. Belastingsmeetapparaat voor ijsvormingstest van testkamer voor lage temperatuuromgeving volgens conclusie 1, met het kenmerk, dat het bovengenoemde toevoermechanisme omvat: Montagebasis van Stappenmotor (3), verticaal bevestigd aan de rechterkant van de bovengenoemde basis (1); Lagerhouder (2), verticaal bevestigd aan de linkerkant van de bo- vengenoemde basis (1); Steun (5), bevestigd aan de zijkant van de bovengenoemde basis (1) in de buurt van de bovengenoemde montagebasis van de stappenmotor (3): Kogelomloopspindel (8), horizontaal bevestigd, waarvan het lin- keruiteinde door een lager is aangesloten met de bovengenoemde la-The load measuring apparatus for icing test of low temperature environment test chamber according to claim 1, characterized in that said feeding mechanism comprises: Stepper motor mounting base (3) vertically attached to the right side of said base (1); Bearing holder (2), mounted vertically on the left side of the above base (1); Support (5), attached to the side of the above-mentioned base (1) near the above-mentioned stepper motor mounting base (3): Ball screw (8), fixed horizontally, the left end of which is connected by a bearing to the above la- gerhouder (2) bevestigd aan de linkerkant van de basis (1), en waarvan het rechteruiteinde door een lager is aangesloten op de bovengenoemde steun (5) bevestigd aan de rechterkant van de basis (1); Kogelmoer (20), die aan de buitenkant van de bovengenoemde ko- gelomloopspindel (8) is geplaatst en die met de kogelomloopspindel (8) is aangesloten; de bovengenoemde schuiftafel (7) is bevestigd aan de buitenkant van de kogelmoer (20); Stappenmotor (10), bevestigd aan de zijkant van de bovengenoemde stappenmotor montagesteun (3), waarvan de uitgaande as door een koppeling (9) met het rechter uiteinde van de bovengenoemde ko- gelomloopspindel (8) is aangesloten, de stappenmotor (10) is ook elektrisch aangesloten met de voeding (12).ger holder (2) attached to the left side of the base (1), and whose right end is connected by a bearing to the aforementioned support (5) attached to the right side of the base (1); Ball nut (20), which is placed on the outside of the above ball screw (8) and connected with the ball screw (8); the aforementioned sliding table (7) is attached to the outside of the ball nut (20); Stepper motor (10), attached to the side of the above stepper motor mounting bracket (3), the output shaft of which is connected by a coupling (9) to the right end of the above ball screw (8), the stepper motor (10) is also electrically connected to the power supply (12). 3. Belastingsmeetapparaat voor ijsvormingstest van testkamer voor lage temperatuuromgeving volgens conclusie 2, met het kenmerk, dat de bovengenoemde stappenmotor (10) met de stappenmotorbestuurder (11) is aangesloten door geleidende draden, en de stappenmotorbe- stuurder (11) met de voeding (12) en de motorregelaar (13) is aan- gesloten door geleidende draden.The load measuring apparatus for icing test of low temperature environment test chamber according to claim 2, characterized in that the above stepping motor (10) is connected to the stepping motor driver (11) by conductive wires, and the stepping motor driver (11) is connected to the power supply (12 ) and the motor controller (13) is connected by conductive wires. 4. Belastingsmeetapparaat voor ijsvormingstest van testkamer voor lage temperatuuromgeving volgens conclusie 1, met het kenmerk, dat de bovengenoemde rollenbank (14) zich bevindt op dezelfde hoogte als het geteste monster (16) in de testkamer voor lage tempera- tuuromgeving (15).The load measuring apparatus for icing test of low temperature environment test chamber according to claim 1, characterized in that said dynamometer (14) is located at the same height as the tested sample (16) in the low temperature environment test chamber (15). 5. Belastingsmeetapparaat voor ijsvormingstest van testkamer voor lage temperatuuromgeving volgens conclusie 2, met het kenmerk, dat de bovengenoemde schuiftafel (7) een kubusvormige structuur is, waarvan de binnenkant is voorzien van een doorlopend gat voor het bevestigen van de bovengenoemde kogelmoer (20), het onderste op- pervlak van de schuiftafel (7) is bevestigd met een schuifbalk, tussen de schuifbalk en de bovengenoemde schuifrail (6) is er een schuifverbinding.The load measuring apparatus for icing test of low temperature environment test chamber according to claim 2, characterized in that said sliding table (7) is a cubic structure, the inside of which is provided with a through hole for fixing said ball nut (20), the lower surface of the sliding table (7) is fixed with a sliding bar, between the sliding bar and the above sliding rail (6) there is a sliding connection.
NL2031733A 2022-04-28 2022-04-28 A load measuring device for freezing test in low temperature environment test chamber NL2031733B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL2031733A NL2031733B1 (en) 2022-04-28 2022-04-28 A load measuring device for freezing test in low temperature environment test chamber

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Application Number Priority Date Filing Date Title
NL2031733A NL2031733B1 (en) 2022-04-28 2022-04-28 A load measuring device for freezing test in low temperature environment test chamber

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NL2031733A NL2031733A (en) 2023-03-07
NL2031733B1 true NL2031733B1 (en) 2023-03-22

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