CN109520861B - Shear rate limit measuring device for liquid energetic material - Google Patents
Shear rate limit measuring device for liquid energetic material Download PDFInfo
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- CN109520861B CN109520861B CN201811363069.5A CN201811363069A CN109520861B CN 109520861 B CN109520861 B CN 109520861B CN 201811363069 A CN201811363069 A CN 201811363069A CN 109520861 B CN109520861 B CN 109520861B
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- energetic material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses an energetic material shear rate limit measuring device, which comprises an explosion-proof motor, a rotating speed and torque sensor, a rotating disc, a hydraulic cylinder and a sleeve; the explosion-proof motor is connected with the rotating speed and torque sensor, the rotating speed and torque sensor is connected with the rotating disc, the rotating disc rotates under the driving of the explosion-proof motor, the rotating speed and torque sensor is used for measuring the rotating speed and torque of the rotating disc, the sleeve is connected with a piston rod of the hydraulic cylinder and can move back and forth under the action of the piston rod of the hydraulic cylinder, and under the condition that the sleeve moves forwards, the energetic material in the sleeve is pressed to the rotating disc and rotates under the driving of the rotating disc. The invention can obtain the ultimate shear rate and the magnitude of shear stress of the energetic material during blasting under different pressures, and has the advantages of simple structure, safety, reliability and easy operation.
Description
Technical Field
The invention belongs to the field of energetic material safety performance testing, and particularly relates to an energetic material shear rate limit measuring device.
Background
The energetic material is also called as gunpowder and explosive, is a metastable substance and has the characteristic of high energy density. After being excited by a specific stimulation mode, the energy-saving type multifunctional electric heating device can quickly release a large amount of energy to damage surrounding objects, is often used as weapon equipment power and damage energy for military use, and has wide application in the fields of special chemical industry, mineral exploitation, building traffic, agricultural water conservancy, disaster prevention and relief and the like.
The energetic materials are in a liquid state during the preparation or mixing process, and under different pressures, once the shear rate or the shear stress exceeds a certain value, the energetic materials can be accidentally combusted and even explode, so that serious economic loss and casualties are caused. Therefore, from the safety point of view, the limit values of the shear rate and the shear stress of the energetic material under different pressures are accurately obtained, and the method has scientific guiding significance for the actual production process.
At present, instruments for testing the friction sensitivity of energetic materials, such as a KozLoff friction pendulum, a BAM friction instrument, an ABL friction instrument, a large friction pendulum and the like, exist at home and abroad, but the instruments are only limited to measuring the friction limit of solid energetic materials. At present, instruments specially used for measuring the shear rate and the shear stress of the liquid energetic material are rarely available at home. Therefore, it is an urgent task to research and manufacture a test device which has a simple structure, is safe and reliable, is simple and easy to operate, and can be widely applied to measuring the shear rate and the shear stress of the liquid energetic material.
Disclosure of Invention
The invention aims to solve the problem that the shear rate and the shear stress of a liquid energetic material are difficult to measure in the prior art, and provides a shear rate limit measuring device for the energetic material, which is safe, convenient, simple in structure, easy to operate and accurate and reliable in measuring result.
In order to achieve the above object, an aspect of the present invention provides an energetic material shear rate limit measuring device, including an explosion-proof motor, a rotational speed and torque sensor, a rotating disc, a hydraulic cylinder and a sleeve; the explosion-proof motor is connected with the rotating speed and torque sensor, the rotating speed and torque sensor is connected with the rotating disc, the rotating disc rotates under the driving of the explosion-proof motor, the rotating speed and torque sensor is used for measuring the rotating speed and torque of the rotating disc, the sleeve is connected with a piston rod of the hydraulic cylinder and can move back and forth under the action of the piston rod of the hydraulic cylinder, and under the condition that the sleeve moves forwards, the energetic material in the sleeve is pressed to the rotating disc and rotates under the driving of the rotating disc.
The shear rate limit measuring device for the energetic material can measure the shear rate and the shear stress limit of the liquid energetic material under different pressures, and is safe, convenient, simple in structure, easy to operate and accurate and reliable in measuring result.
Drawings
FIG. 1 is a perspective view of an apparatus for measuring shear rate limit of an energetic material in accordance with an embodiment of the present invention;
fig. 2 is a block diagram of the rotary disk and sleeve of fig. 1.
In the figure: 1. the explosion-proof motor comprises an explosion-proof motor, 2, a first coupler, 3, a rotating speed and torque sensor, 4, a second coupler, 5, a bearing seat, 6, a rotating disc, 7, a sleeve, 8, a flange connecting piece, 9, a first hydraulic cylinder foot seat, 10, a hydraulic cylinder, 11, a second hydraulic cylinder foot seat, 12, an operating platform, 13, a rupture disc and 14, a charging hole.
Detailed Description
For better understanding of the objects and technical solutions of the present invention, the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The description is to be regarded as illustrative in nature and illustrative in nature, and is not intended to limit the scope of the invention.
As shown in fig. 1 and fig. 2, the shear rate limit measuring device for energetic materials according to an embodiment of the present invention comprises a driving and measuring part and a control part; the driving and measuring part consists of an explosion-proof motor 1 with a speed reducer, a first coupler 2, a rotating speed and torque sensor 3 and a rotating disc 6, wherein the explosion-proof motor 1, the first coupler 2 and the rotating disc 6 are combined to drive, and the rotating speed and torque sensor 3 is responsible for measuring the rotating speed of the rotating disc 6 and the transmitted shearing torque; the control part consists of a hydraulic cylinder 10, a second coupling 4 and a sleeve 7, and can quantitatively control the axial displacement of the sleeve 7. The sleeve 7 is radially fixed and axially movable back and forth by the piston rod of the hydraulic cylinder 10 under the action of hydraulic oil.
The explosion-proof motor 1 with the speed reducer is connected with the rotating speed and torque sensor 3 through the first coupler 2, the rotating speed and torque sensor 3 is connected with the rotating disc 6 through the second coupler 4, and a bearing seat 5 supported by double points is arranged between the second coupler 4 and the rotating disc 6; the sleeve 7 is connected with a piston rod of the hydraulic cylinder 10 through a flange connecting piece 8, and the sleeve 7 can move back and forth along the axial direction through the piston rod under the action of hydraulic oil, so that the pressure building and regulation of a liquid sample in the sleeve 7 are facilitated; the front end and the rear end of the hydraulic cylinder 10 are respectively fixed by a first hydraulic cylinder foot seat 9 and a second hydraulic cylinder foot seat 11; the bearing seat 5 supported by double points, the explosion-proof motor 1 with the speed reducer, the first hydraulic cylinder foot seat 9 and the second hydraulic cylinder foot seat 11 are fixed on the operating platform 12.
The rotating disc 6 and the sleeve 7 jointly form a bearing space and an explosion site of a liquid energetic material sample, and the liquid energetic material is compressed under the matching of the rotating disc 6 and the sleeve 7 and is driven by the rotating disc 6 to rotate. The rotating disc 6 and the sleeve 7 are located on the same axis, a gap is sealed between the rotating disc and the sleeve, and the sealing gap is 0.01-0.03 mm.
The center of the bottom of the sleeve 7 is provided with a rupture disk 13, and the pressure can be safely released in time after the sample is exploded. The wall surface of the sleeve 7 is provided with a feeding hole 14, so that feeding is convenient.
During the measurement, before starting explosion-proof machine 1 with the reduction gear, 1 ~ 2g of sample that awaits measuring is evenly filled in sleeve 7 by charge door 14 earlier, and under the effect of hydraulic oil, pneumatic cylinder 10 piston rod pushes forward, presses the sample in the sleeve 7 to rolling disc 6, and the sample is compacted by rolling disc 6, and thickness is about 1 ~ 3mm, and the sample bears the oil feed pressure of pressure through pneumatic cylinder 10 and adjusts. The explosion-proof motor 1 with the speed reducer is started, the rotating speed can be adjusted to a given value from low to high, the rotating disc 6 connected with the explosion-proof motor 1 rotates, the rotating disc 6 drives the sample in the sleeve 7 to rotate, the rotating speed of the liquid sample on the contact surface of the rotating disc 6 is the same as that of the rotating disc 6 under the condition that the wall surface does not slide, the relative speed of the sample on the contact surface of the inner wall of the sleeve 7 is 0, the rotating speed and the torque of the sample on the rotating disc 6 can be directly measured by the rotating speed and torque sensor 3, and the shearing rate and the shearing stress of the sample can be calculated accordingly. Under the condition of different pressures, the rotating speed is adjusted, after the sample is exploded, the internal pressure of the sleeve 7 can be instantly increased and exceeds the rated pressure of the rupture disk 13, the rupture disk 13 is opened and the pressure in the sleeve 7 is rapidly released, so that the explosion scale can be controlled within a safety range. The shear rate and the shear stress measured and calculated at this time are the limit values at this pressure.
By adjusting the oil inlet pressure of the hydraulic cylinder 10 and adjusting the rotation speed, the shear rate and shear stress limit values of the test piece under different pressures can be measured and recorded.
Compared with the prior art, the invention has the beneficial effects that:
(1) the measuring device provided by the invention has the advantages of small volume, simple structure and stable work, and the explosion-proof sheet is arranged at the bottom of the sleeve, so that the explosion of the liquid energetic material can be controlled within a safe range;
(2) the measuring device provided by the invention is provided with the charging hole on the wall surface of the inner wall of the sleeve, so that the charging and the changing are easy, the operation is simple, the cleaning is convenient, and the liquid energetic material can be repeatedly used;
(3) the measuring device provided by the invention can measure the limit values of the shear rate and the shear stress of the liquid energetic material under different pressures, has a wide application range, and has accurate and reliable measurement data.
The above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The shear rate limit measuring device for the liquid energetic material is characterized by comprising an explosion-proof motor (1), a rotating speed and torque sensor (3), a rotating disc (6), a hydraulic cylinder (10) and a sleeve (7);
the explosion-proof motor (1) is connected with the rotating speed and torque sensor (3), the rotating speed and torque sensor (3) is connected with the rotating disc (6), the rotating disc (6) is driven by the explosion-proof motor (1) to rotate, the rotating speed and torque sensor (3) is used for measuring the rotating speed and torque of the rotating disc (6), the sleeve (7) is connected with a piston rod of the hydraulic cylinder (10) and can move back and forth under the action of the piston rod of the hydraulic cylinder (10), and under the condition that the sleeve (7) moves forwards, the liquid energetic material in the sleeve (7) is pressed to the rotating disc (6) and is driven by the rotating disc (6) to rotate.
2. The shear rate limit measurement device for liquid energetic materials according to claim 1, characterized by further comprising a first coupling (2) connecting the explosion proof motor (1) and the rotational speed and torque sensor (3) and a second coupling (4) connecting the rotational speed and torque sensor (3) and the rotating disc (6).
3. The shear rate limit measurement device of a liquid energetic material according to claim 2, further comprising a bearing seat (5) disposed between the second coupling (4) and the rotating disc (6).
4. The device for measuring shear rate limit of energetic material of liquid according to any of claims 1 to 3, characterized by further comprising a flange connection (8) connecting the sleeve (7) and the piston rod of the hydraulic cylinder (10).
5. The device for measuring the shear rate limit of the liquid energetic material according to any one of claims 1 to 3, characterized in that a rupture disc (13) is installed at the bottom of the sleeve (7) and is used for pressure relief when the liquid energetic material is exploded.
6. The device for measuring the shear rate limit of a liquid energetic material according to any one of claims 1 to 3, characterized in that the wall of the sleeve (7) is provided with a feed hole (14) for feeding the liquid energetic material.
7. The device for measuring the shear rate limit of a liquid energetic material according to any one of claims 1 to 3, characterized in that a gap seal is used between the inner wall of the sleeve (7) and the rotating disc (6).
8. The device for measuring the shear rate limit of the energetic material in liquid according to any one of claims 1 to 3, characterized in that the explosion-proof motor (1) is provided with a speed reducer capable of adjusting the rotation speed from low to high to a given value.
9. The shear rate limit measurement device for energetic materials of liquids as claimed in claim 3, characterized in that the front and back ends of the hydraulic cylinder (10) are fixed by a first hydraulic cylinder foot (9) and a second hydraulic cylinder foot (11), respectively.
10. The shear rate limit measurement device for liquid energetic materials according to claim 9, characterized by further comprising an operation table (12), wherein the bearing seat (5), the explosion-proof motor (1), the first hydraulic cylinder foot seat (9) and the second hydraulic cylinder foot seat (11) are fixed on the operation table (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811363069.5A CN109520861B (en) | 2018-11-15 | 2018-11-15 | Shear rate limit measuring device for liquid energetic material |
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| CN201811363069.5A CN109520861B (en) | 2018-11-15 | 2018-11-15 | Shear rate limit measuring device for liquid energetic material |
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| CN109520861A CN109520861A (en) | 2019-03-26 |
| CN109520861B true CN109520861B (en) | 2020-10-27 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697628B (en) * | 2020-11-23 | 2023-04-07 | 南京理工大学 | Testing device and testing method for speed and blade of energetic material in shearing process |
| CN113281485B (en) * | 2021-05-19 | 2023-07-14 | 北京化工大学 | Device and method for evaluating safety of extrusion process of energetic material |
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| JPH03179233A (en) * | 1989-12-07 | 1991-08-05 | Nkk Corp | Shear stress powdering tester for coke |
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