CN106644260B - 2MN dead weight superposition composite force standard machine - Google Patents
2MN dead weight superposition composite force standard machine Download PDFInfo
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- CN106644260B CN106644260B CN201710060727.2A CN201710060727A CN106644260B CN 106644260 B CN106644260 B CN 106644260B CN 201710060727 A CN201710060727 A CN 201710060727A CN 106644260 B CN106644260 B CN 106644260B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The 2MN dead weight superposition compound force standard machine comprises an upper loading mechanism and a frame; the upper loading mechanism comprises an upper beam, a base, four ball screws, a movable beam and four peripheral support columns; the four ball screws penetrate through the upper beam and the base, and the movable beam is sleeved on the four ball screws; the frame is positioned below the base; the frame forms a rigid cage structure; the device also comprises a 2MN oil cylinder piston, a bearing plate and a standard sensor group; the 2MN cylinder piston is arranged on the upper beam; the standard sensor group consists of 3 680KN sensors, and is embedded in the movable beam; the bearing plate is arranged on the movable beam. The invention realizes the two-in-one of the dead weight type force standard machine and the superposition type force standard machine, and effectively improves the utilization rate and the detection efficiency of the equipment. And the design and the manufacture of a hanging mechanism for disassembling and assembling the weights without barriers are realized.
Description
[ field of technology ]
The invention belongs to the technical field of force standard machines, and particularly relates to a 2MN dead weight superposition compound force standard machine.
[ background Art ]
The force value measurement has important relation with national economic construction, national defense construction, scientific research and people's life. The force standard device is a force value measuring standard which generates standard force values and is used for verification and calibration of a standard force measuring instrument or a force sensor, and is called a force standard machine. Force standard machines are generally of four types: dead weight, lever, hydraulic and stacked.
The gravity force value of the weight in the earth gravitational field is utilized to establish a force value base and a standard, the weight quality is directly traced to the quality standard, and higher accuracy can be obtained. Currently, dead weight force standard machines are adopted by all countries in the world as the standard of magnitude tracing, the largest dead weight force standard machine in the world is 1000klbf (about 4.5 MN) of National Institute of Standards and Technology (NIST), and the force value relative expansion uncertainty is 0.002% (k=3); the largest dead weight force standard machine in China is a 1MN force value national standard stored in China test institute, and the relative expansion uncertainty of the force value is 0.002% (k=3). Dead weight type force standard machine is huge in size and high in cost, and because of the highest accuracy, the highest standard (standard) for measuring force value is established in all countries of the world.
The force standard machine which adopts a force sensor as a reference standard and is connected with a detected sensor in series and applies load in a mechanical or hydraulic mode is internationally called as a superposition type force standard machine. The superimposed force standard machine has a simple structure and relatively low manufacturing cost, and has no high accuracy of the dead weight force standard machine but can meet the verification and calibration requirements, so the superimposed force standard machine is adopted by countries around the world.
[ invention ]
The invention aims to solve the technical problem of providing a 2MN dead weight superposition composite force standard machine, which realizes two-in-one of the dead weight force standard machine and the superposition force standard machine and effectively improves the equipment utilization rate and the detection efficiency.
The invention is realized in the following way:
the 2MN dead weight superposition compound force standard machine comprises an upper loading mechanism and a frame; the upper loading mechanism comprises an upper beam, a base, four ball screws, a movable beam and four peripheral support columns; the four ball screws penetrate through the upper beam and the base, and the movable beam is sleeved on the four ball screws; the rack is positioned below the base; the frame forms a rigid cage-shaped structure; the device also comprises a 2MN oil cylinder piston, a bearing plate and a standard sensor group; the 2MN cylinder piston is arranged on the upper beam; the standard sensor group consists of 3 680KN sensors, and is embedded in the movable beam; the bearing plate is arranged on the movable beam.
Further, the upper loading mechanism is also provided with a reverser and a pull-to connecting piece; a central suspender is arranged in the frame; the reverser comprises an upper support, an upright post and a lower support; the upper support and the lower support are connected through the upright post; the upright posts penetrate through the movable beam, and the upper and lower supports are respectively positioned above and below the movable beam; the pulling connecting piece is connected with the center suspender through threads; the lower support is connected with the central suspender through a joint bearing; the joint bearing comprises a spherical connecting piece with a central hole and an arc-shaped surface supporting piece arranged at the bottom of the inner side of the lower support; the spherical connecting piece with the center hole is sleeved on the center suspender; the bottom of the spherical surface connecting piece with the center hole is a spherical surface and is abutted with the arc-shaped surface supporting piece; the number of the upright posts is three, and the upright posts are uniformly distributed between the upper support and the lower support at intervals.
Further, the bottom of the frame is provided with a mounting seat; the mounting seat is of a hollow structure, and one side surface is hollow; the weight disassembling and moving mechanism stretches into the mounting seat hollow structure from the mounting seat hollow part and is used for taking out the weight from the rack; an external lifting mechanism extends into the frame and is used for lifting the weight in the frame; a center suspender, weights, weight trays and clamping sleeves are arranged in the rack; the weights and the weight trays are sleeved on the central suspender; a groove is formed in the center suspender; the clamping sleeve is two semicircular clamping rings; the two semicircular clamping rings are clamped in the grooves; the outer edge of weight tray downwardly extending just will block the card sleeve of locating in the recess retrains.
Further, a hanging system loading state detection device is arranged in the center of the bottom in the frame and comprises a detection seat and six non-contact probes; the detection seat is of a circular ring structure and is concentric with the hanging system; the detection seat comprises a base part and an annular part; the six non-contact probes are uniformly distributed on the annular part.
Further, the non-contact probe is a non-contact displacement sensor.
The invention has the advantages that:
the 2MN dead weight superposition composite force standard device adopts a dead weight superposition composite design, and can effectively improve the detection efficiency and the equipment utilization rate. The invention focuses on the improved design of the dead weight type force standard machine structure, in particular to the design and manufacture of a hanging mechanism capable of realizing barrier-free disassembly and assembly of weights, and the design and manufacture of a superposed dead weight type composite rack structure.
[ description of the drawings ]
The invention will be further described with reference to the accompanying drawings, in conjunction with examples.
Fig. 1 is a schematic diagram of the structure of the present invention.
FIG. 2 is a schematic view of the structure of the first-stage hanging part in the present invention.
Fig. 3 is a schematic view of the structure of the knuckle bearing part in the present invention.
Fig. 4 is a schematic view of a frame structure in the present invention.
Fig. 5 is a schematic view of the weight and weight tray device of the present invention.
FIG. 6 shows a system loading state detection device of the present invention.
[ detailed description ] of the invention
As shown in fig. 1, a 2MN dead weight superposition compound force standard machine comprises an upper loading mechanism 1 and a frame 2; the upper loading mechanism 1 comprises an upper beam 11, a base 12, four ball screws 13, a movable beam 14 and four support columns 15 at the periphery; the four ball screws 13 are arranged on the upper beam 11 and the base 12 in a penetrating manner, and the moving beam 14 is sleeved on the four ball screws 13; the frame 2 is positioned below the base 12; the frame 2 forms a rigid cage-like structure; the device also comprises a 2MN oil cylinder piston 3, a bearing plate 4 and a standard sensor group 5; the 2MN cylinder piston 3 is arranged on the upper beam 11; the standard sensor group 5 is composed of 3 680KN sensors, and is embedded in the movable beam 14; the bearing plate 4 is provided on the moving beam 14. The 2MN dead weight superposition composite force standard device adopts a dead weight superposition composite design, and can effectively improve the detection efficiency and the equipment utilization rate.
As shown in fig. 2 and 3, the upper loading mechanism 1 is also provided with a reverser 6 and a pull-to connector 7; a central suspender 8 is arranged in the frame 2; the reverser 6 comprises an upper support 61, a column 62 and a lower support 63; the upper support 61 and the lower support 63 are connected through a column 62; the upright post 62 is arranged on the movable beam 14 in a penetrating way, and the upper and lower supports 61 and 63 are respectively positioned above and below the movable beam 14; the pull-to connecting piece 7 is connected with the center suspender 8 through threads; the lower support 63 is connected with the central suspender 8 through a joint bearing 9; the knuckle bearing 9 comprises a spherical connecting piece 91 with a center hole and an arc-shaped surface supporting piece 92 arranged at the bottom of the inner side of the lower support 63; the spherical connecting piece 91 with the center hole is sleeved on the center suspender 8; the bottom of the spherical surface connecting piece 91 with the center hole is a spherical surface and is abutted with the arc-shaped surface supporting piece 92; the number of the upright posts 62 is three, and the upright posts 62 and the lower support posts 63 are uniformly distributed at intervals. The reverser 6 and the center suspender 8 can be separated, and work when the tested piece is pressed to be tested, and the load of the reverser is 20kN and is used as the first-stage load of the force standard machine. When the tested piece is pulled to test, the reverser 6 is separated from the center suspender 8 and does not work, so that the influence of the tilting and swinging of the reverser 6 on the measurement accuracy is avoided. Because the reverser 6 and the center suspender 8 can be separated, the whole machine can be calibrated according to regulations within the range of 20kN to 2MN, the range is enlarged, and the accuracy of pull-up test measurement is improved.
As shown in fig. 4, the bottom of the frame 2 is provided with a mounting seat 10; the mounting seat 10 is of a hollow structure, and one side surface is hollow; a weight detaching and moving mechanism 20 extending into the hollow structure of the mounting base 10 from the hollow part of the mounting base 10 for taking out the weight from the frame 2; an external lifting mechanism (not shown) extends into the frame 2 for lifting the weight in the frame 2; as shown in fig. 5, the frame 2 is provided with a weight loading and unloading mechanism 400, a center suspender 8, weights 21, weight trays 22 and clamping sleeves 23; the weight 21 and the weight tray 22 are sleeved on the center suspender 8; a groove 81 is formed in the center suspender 8; the clamping sleeve 23 is provided with two semicircular clamping rings; the two semicircular clamping rings are clamped in the grooves 81; the outer edge of the weight tray 22 extends downwards, and the clamping sleeve 23 clamped in the groove 81 is just restrained. The weight is convenient to detach quickly. The weight is detached when the force standard machine does not work, the weight is placed on the weight loading and unloading mechanism 400 at this moment, the weight detaching and moving mechanism 20 is moved to the bottom of the weight during detaching and working, the weight tray is moved upwards, the two semicircular clamping rings (clamping sleeves 23) do not have the constraint of the weight tray 22, the weight tray 22 can be removed, then the weight tray 22 can be moved to the bottom of the center suspender 8 without barriers, the weight placed on the weight loading and unloading mechanism 20 is lifted by the external lifting mechanism, the weight is rotated by a certain angle, the external lifting mechanism can be used for transporting the weight to the weight detaching and moving mechanism at the bottom of the rack without barriers, and verification is carried out after the weight is removed. The weights 21 and the weight trays 22 sleeved on the center suspender 8 are disassembled step by step from bottom to top according to the steps, so that all weights and weight hanging devices can be quickly disassembled and assembled without barriers, and verification is facilitated.
As shown in fig. 6, a suspension system loading state detecting device is installed in the center of the bottom in the frame 2, and includes a detecting seat 100 and six non-contact probes 200; the detecting seat 100 is in a circular ring structure and is concentric with the hanging system; the detection seat 100 comprises a base part 101 and an annular part 102; the six non-contact probes 200 are evenly distributed over the annular portion. The non-contact probe 200 is a non-contact displacement sensor. The deflection of the center boom and the inverter can be calculated from the six non-contact head measurements. Stopping the test when the inclination exceeds the allowable requirement, rechecking the influence of the placement position of the tested piece and the like on the hanging deflection factor, and re-testing after adjustment, thereby improving the measurement accuracy.
The invention focuses on the improved design of the dead weight type force standard machine structure, and can realize the design and manufacture of a hanging mechanism for disassembling and assembling weights without barriers, and the design and manufacture of a superposed dead weight type composite rack structure.
The foregoing is merely illustrative of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1.2MN dead weight superposition compound force standard machine, comprising an upper loading mechanism and a frame; the upper loading mechanism comprises an upper beam, a base, four ball screws, a movable beam and four peripheral support columns; the four ball screws penetrate through the upper beam and the base, and the movable beam is sleeved on the four ball screws; the rack is positioned below the base; the frame forms a rigid cage-shaped structure; the method is characterized in that: the device also comprises a 2MN oil cylinder piston, a bearing plate and a standard sensor group; the 2MN cylinder piston is arranged on the upper beam; the standard sensor group consists of 3 680KN sensors, and is embedded in the movable beam; the bearing plate is arranged on the movable beam;
the upper loading mechanism is also provided with a reverser and a pull-to connecting piece; a central suspender is arranged in the frame; the reverser comprises an upper support, an upright post and a lower support; the upper support and the lower support are connected through the upright post; the upright posts penetrate through the movable beam, and the upper support and the lower support are respectively positioned above and below the movable beam; the pulling connecting piece is connected with the center suspender through threads; the lower support is connected with the central suspender through a joint bearing; the joint bearing comprises a spherical connecting piece with a central hole and an arc-shaped surface supporting piece arranged at the bottom of the inner side of the lower support; the spherical connecting piece with the center hole is sleeved on the center suspender; the bottom of the spherical surface connecting piece with the center hole is a spherical surface and is abutted with the arc-shaped surface supporting piece; the number of the upright posts is three, and the upright posts are uniformly distributed between the upper support and the lower support at intervals;
the bottom of the frame is provided with a mounting seat; the mounting seat is of a hollow structure, and one side surface is hollow; the weight loading and unloading mechanism is arranged on the inner side wall of the frame; the weight disassembling and moving mechanism stretches into the mounting seat hollow structure from the mounting seat hollow part and is used for taking out the weight from the rack; an external lifting mechanism extends into the frame and is used for lifting the weight in the frame; a center suspender, weights, weight trays and clamping sleeves are arranged in the rack; the weights and the weight trays are sleeved on the central suspender; a groove is formed in the center suspender; the clamping sleeve is two semicircular clamping rings; the two semicircular clamping rings are clamped in the grooves; the outer edge of weight tray downwardly extending will block the card sleeve of locating in the recess retrains.
2. The 2MN dead weight superposition compound force standard machine of claim 1, wherein: the center of the bottom in the frame is provided with a hanging system loading state detection device which comprises a detection seat and six non-contact probes; the detection seat is of a circular ring structure and is concentric with the hanging system; the detection seat comprises a base part and an annular part; the six non-contact probes are uniformly distributed on the annular part.
3. The 2MN dead weight superposition compound force standard machine of claim 2, wherein: the non-contact probe is a non-contact displacement sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710060727.2A CN106644260B (en) | 2017-01-25 | 2017-01-25 | 2MN dead weight superposition composite force standard machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710060727.2A CN106644260B (en) | 2017-01-25 | 2017-01-25 | 2MN dead weight superposition composite force standard machine |
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| CN106644260A CN106644260A (en) | 2017-05-10 |
| CN106644260B true CN106644260B (en) | 2023-07-25 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760016B (en) * | 2018-07-23 | 2023-11-24 | 广东省计量科学研究院 | Novel standard machine |
| CN111077015A (en) * | 2018-10-18 | 2020-04-28 | 梅特勒-托利多(常州)精密仪器有限公司 | Dead weight type force standard machine |
| CN112362198A (en) * | 2020-11-20 | 2021-02-12 | 上海工业自动化仪表研究院有限公司 | Automatic centering mechanism of sensor |
| CN112556923A (en) * | 2020-12-09 | 2021-03-26 | 福州大学 | Weight optimal configuration method of large-force-value dead weight type force standard machine |
| CN113188643B (en) * | 2021-04-26 | 2022-10-18 | 陕西省计量科学研究院 | Calibrating device of large-scale electronic hanging scale |
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