CN108981501B - Inner trajectory low-speed friction force simulation test bench - Google Patents
Inner trajectory low-speed friction force simulation test bench Download PDFInfo
- Publication number
- CN108981501B CN108981501B CN201810630544.4A CN201810630544A CN108981501B CN 108981501 B CN108981501 B CN 108981501B CN 201810630544 A CN201810630544 A CN 201810630544A CN 108981501 B CN108981501 B CN 108981501B
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- Prior art keywords
- hollow
- oil pressure
- hollow oil
- test
- push rod
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B35/00—Testing or checking of ammunition
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Automation & Control Theory (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention particularly relates to an inner trajectory low-speed friction force simulation test bed, which solves the problem that the existing ammunition friction force test has higher test precision by calculation. The workstation top is provided with cover tube-shape simulation bore and linear push rod motor and hollow oil pressure ejector pin, be provided with the linear bearing seat on the cover tube-shape simulation bore, be provided with support I on the linear push rod motor, be provided with support II on the hollow oil pressure ejector pin, linear push rod motor's push rod and cover tube-shape simulation bore fixed connection, both ends are provided with annular stopper about the cover tube-shape simulation bore, the inboard of two annular stoppers all is fixed with cyclic annular felt-pad, be provided with hollow test projectile in the cover tube-shape simulation bore, the right-hand member intercommunication of hollow oil pressure ejector pin and hollow test projectile, be provided with the foil gage on the outer cylinder face of hollow oil pressure ejector pin. The invention not only simulates the actual working condition of the projectile in the inner trajectory flight, but also can directly and accurately obtain the low-speed friction force of the projectile in the inner trajectory.
Description
Technical Field
The invention relates to a friction force test device, in particular to an inner trajectory low-speed friction force simulation test bed.
Background
The friction force of the ammunition is a key technology which restricts the research and development of novel ammunition, and if the technical breakthrough of the ammunition is realized, the friction force value of the ammunition must be obtained.
The friction force of the ammunition can be obtained by calculation, but the calculated values are obtained under theoretical assumed conditions, and are obviously different from actual working conditions; due to space and other problems, the friction force of the ammunition is difficult to directly measure in live ammunition target practice.
Disclosure of Invention
The invention provides an inner trajectory low-speed friction simulation test bed, which aims to solve the problem that the friction test of the existing ammunition is relatively high in test precision by calculation.
The invention is realized by adopting the following technical scheme: the utility model provides an interior trajectory low-speed frictional force simulation test bench, comprises a workbench, the workstation top is provided with sleeve form simulation bore and is located the linear rod motor and the hollow oil pressure ejector pin of its left and right sides, be provided with the linear bearing seat fixed with the workstation on the sleeve form simulation bore, be provided with the support I fixed with the workstation on the linear rod motor, be provided with the support II fixed with the workstation on the hollow oil pressure ejector pin, linear rod motor's push rod and sleeve form simulation bore fixed connection, both ends are provided with annular stopper about the sleeve form simulation bore, the inboard of two annular stoppers all is fixed with cyclic annular felt-pad, be provided with hollow test projectile in the sleeve form simulation bore, the left end of hollow oil pressure ejector pin stretches into sleeve form simulation bore and communicates with the right-hand member of hollow test projectile, be provided with a plurality of strain pieces on the outer cylinder face of hollow oil pressure ejector pin.
When an inner trajectory low-speed friction force simulation test is carried out, firstly, the sleeve-shaped simulation gun bore is pushed to the leftmost end which can be reached, secondly, the hollow oil pressure ejector rod is pressurized to the inner part of the hollow test projectile, the outer surface of the hollow test projectile is tightly attached to the inner surface of the sleeve-shaped simulation gun bore, then, the linear push rod motor is opened, the push rod of the linear push rod motor pushes the sleeve-shaped simulation gun bore to move rightwards at a constant speed axially, and at the moment, the hollow oil pressure ejector rod bears the supporting force FNThe friction force f is equal to that of the hollow test projectile, namely the measurement of the friction force of the hollow test projectile is converted into the measurement of the hollowMeasurement of stress of oil-pressure ejector rod, hollow oil-pressure ejector rod supporting force FNIs generated, namely micro strain, the micro strain is captured by a strain gauge, and according to the generalized hooke's law, the relation between the stress and the strain is as follows: σ ═ E × epsilon, then the friction force F can be expressed as F ═ FNThe method is characterized in that the test precision of the hollow test projectile is higher than that of the hollow oil ejector rod, and the test precision is higher than that of the hollow test projectile.
An inner trajectory low-speed friction force simulation test bed further comprises a constant pressure pump, a strain gauge and a linear motor driver; the output end of the strain gauge is connected with the input end of the strain gauge; the input end of the linear push rod motor is connected with the output end of the linear motor driver, a high-pressure hose communicated with the right end of the hollow oil pressure ejector rod and the constant-pressure pump is arranged between the right end of the hollow oil pressure ejector rod and the constant-pressure pump, and a pressure gauge is arranged on the high-pressure hose.
The arrangement of the strain gauge is to measure the friction force of the micro strain captured by the strain gauge through the filtering, amplifying and recording process of the micro strain; the constant pressure pump can be controlled to generate different pressures, and the pressure is observed in real time through the pressure gauge.
The right side wall of the hollow test pellet is provided with an internal threaded pipe joint communicated with the hollow test pellet, and the left end part of the hollow oil pressure ejector rod is in threaded connection with the internal threaded pipe joint; the right end of the hollow oil pressure ejector rod is connected with the left end of the high-pressure hose through a high-pressure hose joint.
The arrangement of the high-pressure hose joint and the internal thread pipe joint facilitates the replacement of the hollow test projectile and the hollow oil pressure ejector rod.
The invention has reasonable and reliable structural design, not only simulates the actual working condition of the projectile under the inner trajectory flight, but also can directly and accurately obtain the low-speed friction force of the projectile under the inner trajectory, has the function of playing a role in improving the research and development of the ammunition, and has the advantages of simple structure, convenient processing and low cost.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1-workbench, 2-sleeve-shaped simulation gun chamber, 3-linear push rod motor, 4-hollow oil pressure ejector rod, 5-linear bearing seat, 6-support I, 7-support II, 8-annular limiting block, 9-annular felt pad, 10-hollow test pellet, 11-strain gauge, 12-constant pressure pump, 13-strain gauge, 14-linear motor driver, 15-high pressure hose, 16-pressure gauge and 17-high pressure hose joint.
Detailed Description
An inner trajectory low-speed friction simulation test bed comprises a workbench 1, a sleeve-shaped simulation bore 2, linear push rod motors 3 and hollow oil pressure ejector rods 4 are arranged above the workbench 1, the linear push rod motors 3 and the hollow oil pressure ejector rods 4 are positioned on the left side and the right side of the workbench 1, linear bearing seats 5 fixed with the workbench 1 are arranged on the sleeve-shaped simulation bore 2, a support I6 fixed with the workbench 1 is arranged on the linear push rod motor 3, a support II7 fixed with the workbench 1 is arranged on the hollow oil pressure ejector rod 4, a push rod of the linear push rod motor 3 is fixedly connected with the sleeve-shaped simulation bore 2, annular limiting blocks 8 are arranged at the left end and the right end of the sleeve-shaped simulation bore 2, annular felt pads 9 are fixed on the inner sides of the two annular limiting blocks 8, hollow test projectiles 10 are arranged in the sleeve-shaped simulation bore 2, the left end of the hollow oil pressure ejector rod 4 extends into the sleeve-shaped simulation bore 2 and, the outer cylindrical surface of the hollow oil pressure ejector rod 4 is provided with a plurality of strain gauges 11.
An inner trajectory low-speed friction force simulation test bed further comprises a constant pressure pump 12, a strain gauge 13 and a linear motor driver 14; the output end of the strain gauge 11 is connected with the input end of the strain gauge 13; the input end of the linear push rod motor 3 is connected with the output end of a linear motor driver 14, a high-pressure hose 15 communicated with the right end of the hollow oil pressure ejector rod 4 and the constant-pressure pump 12 is arranged between the right end of the hollow oil pressure ejector rod and the constant-pressure pump 12, and a pressure gauge 16 is arranged on the high-pressure hose 15; the right side wall of the hollow test projectile 10 is provided with an internal threaded pipe joint communicated with the hollow test projectile, and the left end part of the hollow oil pressure ejector rod 4 is in threaded connection with the internal threaded pipe joint; the right end of the hollow oil pressure mandril 4 is connected with the left end of the high-pressure hose 15 through a high-pressure hose joint 17.
In the specific implementation process, firstly, the sleeve-shaped simulation gun bore 2 is pushed to the leftmost end which can be reached; secondly, mounting the hollow test projectile 10 on the hollow oil pressure ejector rod 4 through an internal thread pipe joint; inserting the hollow test projectile 10 and the hollow oil pressure ejector rod 4 into the sleeve-shaped simulation gun bore 2 again, and fixing the hollow oil pressure ejector rod 4 on the workbench 1 through a bracket II 7; the high-pressure hose 15 and the hollow oil pressure ejector rod 4 are connected through a high-pressure hose joint 17, and oil pressure generated by the constant-pressure pump 12 is prevented from leaking; and finally, opening a constant pressure pump 12 to load simulated bore pressure on the hollow test projectile 10, observing the loading value in real time through a pressure gauge 9, opening a strain gauge 13 to prepare test data, and opening a linear motor driver 14 to prepare to push the sleeve-shaped simulated bore 2.
Claims (2)
1. The utility model provides an interior ballistic trajectory low-speed frictional force simulation test bench which characterized in that: comprises a workbench (1), a sleeve-shaped simulation gun chamber (2), linear push rod motors (3) and hollow oil pressure push rods (4) are arranged above the workbench (1), the linear push rod motors (3) and the hollow oil pressure push rods (4) are positioned at the left side and the right side of the workbench (1), linear bearing seats (5) fixed with the workbench (1) are arranged on the sleeve-shaped simulation gun chamber (2), a bracket I (6) fixed with the workbench (1) is arranged on the linear push rod motors (3), a bracket II (7) fixed with the workbench (1) is arranged on the hollow oil pressure push rods (4), push rods of the linear push rod motors (3) are fixedly connected with the sleeve-shaped simulation gun chamber (2), annular limiting blocks (8) are arranged at the left end part and the right end part of the sleeve-shaped simulation gun chamber (2), annular felt pads (9) are fixed at the inner sides of the two annular limiting blocks (8), hollow test, the left end of the hollow oil pressure ejector rod (4) extends into the sleeve-shaped simulation gun chamber (2) and is communicated with the right end of the hollow test projectile (10), and the outer cylindrical surface of the hollow oil pressure ejector rod (4) is provided with a plurality of strain gauges (11); the device also comprises a constant pressure pump (12), a strain gauge (13) and a linear motor driver (14); the output end of the strain gauge (11) is connected with the input end of the strain gauge (13); the input end of the linear push rod motor (3) is connected with the output end of the linear motor driver (14), a high-pressure hose (15) communicated with the right end of the hollow oil pressure ejector rod (4) and the constant-pressure pump (12) is arranged between the right end of the hollow oil pressure ejector rod and the constant-pressure pump, and a pressure gauge (16) is arranged on the high-pressure hose (15).
2. The internal ballistic low-speed friction simulation test rig of claim 1, wherein: the right side wall of the hollow test projectile (10) is provided with an internal threaded pipe joint communicated with the hollow test projectile, and the left end part of the hollow oil pressure ejector rod (4) is in threaded connection with the internal threaded pipe joint; the right end of the hollow oil pressure ejector rod (4) is connected with the left end of the high-pressure hose (15) through a high-pressure hose joint (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810630544.4A CN108981501B (en) | 2018-06-19 | 2018-06-19 | Inner trajectory low-speed friction force simulation test bench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810630544.4A CN108981501B (en) | 2018-06-19 | 2018-06-19 | Inner trajectory low-speed friction force simulation test bench |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108981501A CN108981501A (en) | 2018-12-11 |
| CN108981501B true CN108981501B (en) | 2019-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810630544.4A Expired - Fee Related CN108981501B (en) | 2018-06-19 | 2018-06-19 | Inner trajectory low-speed friction force simulation test bench |
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| Country | Link |
|---|---|
| CN (1) | CN108981501B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5031502A (en) * | 1989-09-06 | 1991-07-16 | Cooper Peter D | Adjustable powder measure |
| CN101694365A (en) * | 2009-08-27 | 2010-04-14 | 北京理工大学 | Explosion device with piston device |
| CN102706224A (en) * | 2012-05-23 | 2012-10-03 | 西安近代化学研究所 | Friction load loading device |
| CN103207122A (en) * | 2013-04-15 | 2013-07-17 | 北京理工大学 | Minitype dynamic pulling-pressing experiment system with preload |
| CN103322869A (en) * | 2013-05-20 | 2013-09-25 | 西安近代化学研究所 | Missile body charge friction environment simulating device |
-
2018
- 2018-06-19 CN CN201810630544.4A patent/CN108981501B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5031502A (en) * | 1989-09-06 | 1991-07-16 | Cooper Peter D | Adjustable powder measure |
| CN101694365A (en) * | 2009-08-27 | 2010-04-14 | 北京理工大学 | Explosion device with piston device |
| CN102706224A (en) * | 2012-05-23 | 2012-10-03 | 西安近代化学研究所 | Friction load loading device |
| CN103207122A (en) * | 2013-04-15 | 2013-07-17 | 北京理工大学 | Minitype dynamic pulling-pressing experiment system with preload |
| CN103322869A (en) * | 2013-05-20 | 2013-09-25 | 西安近代化学研究所 | Missile body charge friction environment simulating device |
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| Publication number | Publication date |
|---|---|
| CN108981501A (en) | 2018-12-11 |
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