CN107091707B - Impact force testing device capable of simulating load - Google Patents
Impact force testing device capable of simulating load Download PDFInfo
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- CN107091707B CN107091707B CN201710461096.5A CN201710461096A CN107091707B CN 107091707 B CN107091707 B CN 107091707B CN 201710461096 A CN201710461096 A CN 201710461096A CN 107091707 B CN107091707 B CN 107091707B
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- pressure
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- energy accumulator
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0052—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to impact
Abstract
The invention discloses an impact force testing device capable of simulating a load. The invention comprises a power supply, a secondary instrument and a measuring cylinder. The measuring cylinder can be generally divided into a high-pressure measuring cavity and a low-pressure absorption cavity, and the high-pressure measuring cavity and the low-pressure absorption cavity are filled with hydraulic oil. The high-pressure measuring cavity and the low-pressure absorbing cavity are separated by a partition plate, and an adjustable damping device is arranged on the partition plate; the high-pressure measuring cavity is communicated with the high-frequency energy accumulator; the low-pressure absorption cavity comprises a low-pressure closed space consisting of a rubber film and a sealing cylinder, and inert gas is filled in the closed space. The invention can adjust the maximum measurable impact force of the whole testing device by adjusting the nitrogen pressure in the nitrogen chamber of the high-frequency energy accumulator. When impact force acts on the stamping plate, oil in the high-pressure measuring cavity enters the low-pressure absorbing cavity through the damping holes, a large amount of impact energy is consumed, and rebound of the impact energy is avoided.
Description
Technical Field
The invention belongs to the field of impact force testing, and particularly relates to an adjustable impact force testing device.
Background
The impact machine is widely applied to various fields such as industrial and agricultural production, infrastructure construction and the like, and the impact machine aims to generate impact force to impact an object to be impacted. The impact force test has important significance on the design, optimization and acceptance of the impact machine.
The traditional impact force testing method comprises a final speed method, an indicator diagram method, a mechanical measuring method, a nitrogen measuring method, a stress wave measuring method and the like, although the measuring methods are various, the measuring process can be realized only by destroying an original impact force generating device and additionally arranging a complex sensor in the original impact force generating device, and batch testing is difficult.
The invention patent CN103048075A discloses an impact force testing device, which can quickly measure the impact force of an impact machine. However, the device cannot absorb the impact energy of the impact machine, and is equivalent to a hydraulic spring, after a test, most of the impact energy is rebounded to the impact machine, and the situation is different from the actual situation of the impact load. The rebounded impact energy acts on the impact machine, which causes inaccurate measurement results and easily causes failure of the impact machine.
Disclosure of Invention
The invention aims to provide an adjustable impact force testing device which can test impact forces with different sizes and can absorb most of impact energy. The device can be used for impact force tests of punching machines, forging presses and breaking hammers.
In order to solve the technical problem, the invention provides an impact force testing device which comprises a power supply, a secondary instrument and a measuring cylinder.
The measuring cylinder can be generally divided into a high-pressure measuring cavity and a low-pressure absorption cavity, and the high-pressure measuring cavity and the low-pressure absorption cavity are filled with hydraulic oil.
The high-pressure measuring cavity and the low-pressure absorbing cavity are separated by a partition plate, and an adjustable damping device is arranged on the partition plate.
The high-pressure measuring device is characterized in that a first rubber film and a piston are arranged at the upper end of the high-pressure measuring cavity, the piston is located above the first rubber film, a stamping plate is arranged on the piston, and the stamping plate is in direct contact with an impact machine to receive impact.
The high-pressure measuring cavity is communicated with the high-frequency energy accumulator.
And the high-pressure measuring cavity is provided with a pressure sensor and a displacement sensor which are used for testing the oil pressure of the high-pressure measuring cavity and the displacement of the piston.
The low-pressure absorption cavity comprises a low-pressure closed space consisting of a third rubber film and a sealing cylinder, and inert gas is filled in the closed space.
The secondary meter receives the sensor signal and displays it on the screen.
The power supply supplies power to the sensor and the secondary instrument.
Further, the high-frequency energy accumulator comprises an upper energy accumulator shell, a lower energy accumulator shell and a second rubber film. And a sealed cavity is formed between the second rubber film and the upper shell of the energy accumulator to form an inert gas chamber. And the center of the upper shell of the energy accumulator is provided with an inflation valve, and the pressure of the inert gas can be adjusted through the inflation valve.
The impact force testing device capable of simulating the load is additionally provided with the high-frequency energy accumulator, and a low-pressure space is formed by the third rubber and the sealing cylinder. When the impact force testing device works, the maximum measurable impact force of the whole testing device can be adjusted by adjusting the nitrogen pressure in the nitrogen chamber of the high-frequency energy accumulator. When impact force acts on the stamping plate, oil in the high-pressure measuring cavity enters the low-pressure absorbing cavity through the damping holes, a large amount of impact energy is consumed, and rebound of the impact energy is avoided.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Fig. 1 shows an impact force testing device capable of adjusting load, which comprises a measuring cylinder 8, wherein a rubber membrane I17, an upper pressure ring 3, a piston 18 and a stamping plate 2 are arranged at the top of the measuring cylinder 8, and form a closed cavity together with the measuring cylinder. The closed cavity is divided into an upper high-pressure measuring cavity 14 and a lower low-pressure absorption cavity 10 under the isolation action of an isolation ring 9 and a sealing sleeve 16; an adjustable damping hole 13 capable of adjusting the damping is arranged in the isolating ring 9. The lower part of the sealing sleeve 16 is provided with a rubber membrane III 12, and low-pressure nitrogen is filled in a closed space formed by the rubber membrane III 12 and the sealing sleeve 16.
The outer side of the measuring cylinder 8 is provided with a high-frequency energy accumulator which consists of an energy accumulator lower end cover 5, a rubber membrane II 7, an energy accumulator upper end cover 6 and an inflation valve 11.
The high pressure measuring chamber 14 and the low pressure absorbing chamber 10 are filled with hydraulic oil.
The displacement sensor 4 is used to measure the amount of displacement of the piston 18. The pressure sensor 15 is used to measure the pressure of the oil in the high-pressure measurement chamber 14.
When the high-frequency energy accumulator is actually used, the pressure of the nitrogen chamber of the high-frequency energy accumulator is adjusted to a set value through the inflation valve 11, and then the adjustable damping hole 13 is adjusted to a proper size. The piston 1 of the impact machine falls to impact the stamping plate 2 of the testing device, and the stamping plate 2 downwards extrudes the piston 18 and the membrane I17, so that the pressure of the high-pressure measuring cavity 14 is increased. If the impact force is larger than the set value, when the pressure of the high-pressure measuring cavity 14 is larger than the set value of the high-frequency energy accumulator, the oil liquid in the high-pressure measuring cavity 14 can enter the high-frequency energy accumulator for temporary storage. Meanwhile, because there is a pressure difference between the high pressure measurement chamber 14 and the low pressure absorption chamber 10, the oil enters the low pressure side through the resistance adjustable orifice 13, and the impact energy may be consumed when the oil passes through the adjustable orifice 13. Because the sealed space formed by the rubber membrane III 12 and the sealing sleeve 16 in the low-pressure absorption cavity 10 is large enough and has strong gas compressibility, the entering oil does not cause great change of the pressure of the low-pressure absorption cavity 10, and the pressure difference of the high-pressure side and the low-pressure side is maintained. Until all the oil entering the high-frequency energy accumulator enters the low-pressure side through the adjustable damping hole 13. At this time, the impact energy generated by the impact of this time is completely consumed.
The pressure sensor 15 can record the magnitude of the impact force, and the displacement sensor 4 can record the displacement of the lower piston 18, i.e. the distance the impact machine moves under the impact load.
Claims (2)
1. But load simulation's impact force testing arrangement, including power, secondary instrument and measuring cylinder, its characterized in that:
the measuring cylinder can be generally divided into a high-pressure measuring cavity and a low-pressure absorption cavity, and the high-pressure measuring cavity and the low-pressure absorption cavity are filled with hydraulic oil;
the high-pressure measuring cavity and the low-pressure absorbing cavity are separated by a partition plate, and an adjustable damping hole is arranged on the partition plate;
the upper end of the high-pressure measuring cavity is provided with a first rubber film and a piston, the piston is positioned above the first rubber film, the piston is provided with a stamping plate, and the stamping plate is in direct contact with an impact machine to receive impact;
the high-pressure measuring cavity is communicated with the high-frequency energy accumulator;
the high-pressure measuring cavity is provided with a pressure sensor and a displacement sensor which are used for testing the oil pressure of the high-pressure measuring cavity and the displacement of the piston;
the low-pressure absorption cavity comprises a low-pressure closed space consisting of a third rubber film and a sealing cylinder, and inert gas is filled in the closed space;
the secondary instrument receives the sensor signal and displays the sensor signal on a screen;
the power supply supplies power to the sensor and the secondary instrument;
when the impact force is larger than a set value, hydraulic oil in the high-pressure measuring cavity enters the high-frequency energy accumulator for temporary storage; meanwhile, as the pressure difference exists between the high-pressure measuring cavity and the low-pressure absorbing cavity, hydraulic oil can enter the low-pressure absorbing cavity through the adjustable damping hole, and impact energy is consumed when the hydraulic oil passes through the adjustable damping hole; the low-pressure closed space formed by the third rubber film and the sealing cylinder is large enough, and the gas compressibility of the low-pressure closed space is strong, so that the hydraulic oil entering the low-pressure absorption cavity cannot cause large-amplitude change of the pressure of the low-pressure absorption cavity, and the pressure difference can be maintained until all the hydraulic oil entering the high-frequency energy accumulator enters the low-pressure absorption cavity through the adjustable damping holes.
2. The impact force testing device capable of simulating a load according to claim 1, wherein:
the high-frequency energy accumulator comprises an energy accumulator upper shell, an energy accumulator lower shell and a second rubber film; a sealed cavity is formed between the second rubber film and the upper shell of the energy accumulator to form an inert gas chamber; and the center of the upper shell of the energy accumulator is provided with an inflation valve, and the pressure of the inert gas can be adjusted through the inflation valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710461096.5A CN107091707B (en) | 2017-06-18 | 2017-06-18 | Impact force testing device capable of simulating load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710461096.5A CN107091707B (en) | 2017-06-18 | 2017-06-18 | Impact force testing device capable of simulating load |
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| Publication Number | Publication Date |
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| CN107091707A CN107091707A (en) | 2017-08-25 |
| CN107091707B true CN107091707B (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710461096.5A Active CN107091707B (en) | 2017-06-18 | 2017-06-18 | Impact force testing device capable of simulating load |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07174647A (en) * | 1993-12-17 | 1995-07-14 | Toyoda Mach Works Ltd | Hitting-force monitoring apparatus |
| CN201707192U (en) * | 2010-02-01 | 2011-01-12 | 温州市基安机械有限公司 | Shock resistance tester for high-flow safety valve |
| CN202710090U (en) * | 2012-06-12 | 2013-01-30 | 天津鼎成高新技术产业有限公司 | Hydraulic servo driving balancing unit for swing table heaving motion |
| CN103048075A (en) * | 2013-01-08 | 2013-04-17 | 浙江大学 | Impact force testing device |
| CN106197979A (en) * | 2016-07-28 | 2016-12-07 | 煤炭科学技术研究院有限公司 | A kind of pressure is from the high-flow safety valve test device of buffering |
-
2017
- 2017-06-18 CN CN201710461096.5A patent/CN107091707B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07174647A (en) * | 1993-12-17 | 1995-07-14 | Toyoda Mach Works Ltd | Hitting-force monitoring apparatus |
| CN201707192U (en) * | 2010-02-01 | 2011-01-12 | 温州市基安机械有限公司 | Shock resistance tester for high-flow safety valve |
| CN202710090U (en) * | 2012-06-12 | 2013-01-30 | 天津鼎成高新技术产业有限公司 | Hydraulic servo driving balancing unit for swing table heaving motion |
| CN103048075A (en) * | 2013-01-08 | 2013-04-17 | 浙江大学 | Impact force testing device |
| CN106197979A (en) * | 2016-07-28 | 2016-12-07 | 煤炭科学技术研究院有限公司 | A kind of pressure is from the high-flow safety valve test device of buffering |
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| CN107091707A (en) | 2017-08-25 |
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