CN111366486A - Torsion locking and releasing device - Google Patents
Torsion locking and releasing device Download PDFInfo
- Publication number
- CN111366486A CN111366486A CN202010313570.1A CN202010313570A CN111366486A CN 111366486 A CN111366486 A CN 111366486A CN 202010313570 A CN202010313570 A CN 202010313570A CN 111366486 A CN111366486 A CN 111366486A
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- Prior art keywords
- counter
- hydraulic cylinders
- torsion
- force
- support frame
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
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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
- G01N3/02—Details
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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
- G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional 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
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
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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
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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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
Abstract
The invention provides a torsion locking and releasing device, and relates to the field of material dynamic mechanical property experimental equipment. The novel torsion locking and releasing device mainly comprises a pair of hydraulic cylinders, a pair of friction plates and a counter-force support frame. The two hydraulic cylinders are oppositely fixed on the counter-force support frame, and piston rods of the hydraulic cylinders are provided with semicircular clamping surfaces; the friction plate is in a semicircular structure and is matched and fixed with the semicircular clamping surface of the piston rod. Rigid supports on two sides of the counter-force support frame are connected through a self-balancing pull rod. When the hydraulic cylinders on the two sides are pressurized and depressurized, the locking and releasing of the friction plates on the two sides to the torsion bar input rod can be realized. Because the positive pressure of the hydraulic cylinder and the friction coefficient of the friction plate are known, the clamping force provided by the device can be accurately given, and the device has the capability of accurately and instantly releasing the torsion bar input rod; in addition, the counter-force support frame can provide sufficient counter-force and holding power, and has the characteristics of clear stress, simple structure and reliable operation.
Description
Technical Field
The invention relates to the field of material dynamic mechanical property experimental equipment, in particular to a torsion locking and releasing device of a Hopkinson torsion bar.
Background
The split Hopkinson torsion bar is an experimental device for researching the dynamic shearing behavior of a material under the condition of impact torsion, the pre-stored energy type loading mode is one of the common loading modes, namely, an input torsion bar is divided into two sections by a clamp mechanism, one section can be externally added with torsion moment (called a pre-torsion section), and the other section (the unloaded section) can be prevented from torsion by a clamp; when the clamp is released, the elastic rotational deformation in the pretwisted segments can propagate in the form of a twisting pulse to the unloaded segments. The existing clamp is usually composed of two hinged semicircular bridge arms and a grooving bolt, clamping force is applied to an input torsion bar through screwing of the grooving bolt, and when the pre-stored energy value in the pre-twisting section reaches the experiment requirement, the grooving bolt is unscrewed to release the clamp. The clamping force of the clamp mode is difficult to measure, and the twisting-off process of the bolt is influenced by the bolt material and processing, so that the experiment process is difficult to control, the experiment repeatability is poor, the efficiency is low, and the development and the application of the pre-stored energy type split Hopkinson torsion bar are seriously restricted.
Disclosure of Invention
In order to solve the problems of controllability, accuracy, time response speed and the like of the traditional Hopkinson torsion bar input rod locking and releasing device, the torsion locking and releasing device for the Hopkinson torsion bar is invented, wherein a pair of hydraulic cylinders are used as main parts.
In order to solve the technical problem, the invention provides a torque force locking and releasing device which comprises a pair of hydraulic cylinders, a pair of friction plates and a counter-force supporting frame, wherein the pair of hydraulic cylinders are oppositely fixed on the counter-force supporting frame, a piston rod of each hydraulic cylinder is provided with a semicircular clamping surface, each friction plate is in a semicircular structure, and the shape of each friction plate is matched with and fixed on the semicircular clamping surface of the piston rod.
Preferably, the reaction force support frame comprises two side rigid supports and a self-balancing pull rod, and the self-balancing pull rod is connected between the two side rigid supports.
Preferably, when the hydraulic cylinders on the two sides are pressurized, the two piston rods and the friction plates are driven to move oppositely to lock the torsion bar input rod, and the friction plates and the torsion bar input rod are coaxial.
Preferably, when the hydraulic cylinders on the two sides are relieved of pressure, the piston in the hydraulic cylinder drives the piston rod and the friction plate to return instantaneously, and the clamping force is relieved.
The torsion locking and releasing device of the Hopkinson torsion bar has the following beneficial effects:
1. the device provides positive pressure by a pair of hydraulic cylinders with self-balancing internal force, and provides friction force by a pair of friction plates matched with the hydraulic cylinders, and the clamping force can be accurately given because the positive pressure of the hydraulic cylinders and the friction coefficients of the friction plates are known, and finally the clamping force required by locking the torsion bar input rod is accurately provided; when the hydraulic cylinder is depressurized, the piston of the hydraulic cylinder returns instantaneously, the clamping force is relieved, and the friction plate and the torsion bar input rod are coaxial, so that the hydraulic cylinder has the capability of accurate instantaneous release.
2. The designed reaction support frame can provide enough reaction and supporting force through the self-balancing pull rod and the rigid support, and has the characteristics of definite stress, simple structure and reliable operation.
Drawings
Fig. 1 is a schematic structural view of a torsion lock release device for a hopkinson torsion bar according to the present application.
In the figure: 1. a hydraulic cylinder, 2, a friction plate, 3, a counter-force support frame, 4, a piston rod, 5 and a rigid support,
6. self-balancing pull rod.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
As shown in fig. 1, the torsion lock release device is mainly composed of a pair of hydraulic cylinders 1, a pair of friction plates 2, and a reaction force support bracket 3. The two hydraulic cylinders 1 are oppositely fixed on the counter-force support frame 3, and a piston rod 4 of each hydraulic cylinder 1 is provided with a semicircular clamping surface; the friction plate 2 is in a semicircular structure and is matched and fixed with a semicircular clamping surface of the piston rod 4. The counter-force support frame mainly comprises rigid supports 5 on two sides and a self-balancing pull rod 6; the self-balancing pull rod 6 is connected between the rigid supports 5 on the two sides.
When the hydraulic cylinders 1 on the two sides are pressurized, the two piston rods 4 and the friction plates 2 are driven to move oppositely, so that the torsion bar input rod is locked, and the friction plates 2 and the torsion bar input rod are coaxial. When the hydraulic cylinders 1 on the two sides release pressure, the piston in the hydraulic cylinder drives the piston rod 4 and the friction plate 2 to return instantaneously, and the clamping force is relieved.
The above is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. 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 (4)
1. A torsion locking and releasing device is characterized by comprising a pair of hydraulic cylinders, a pair of friction plates and a counter-force supporting frame, wherein the hydraulic cylinders are oppositely fixed on the counter-force supporting frame, a piston rod of each hydraulic cylinder is provided with a semicircular clamping surface, each friction plate is of a semicircular structure, and the shape of each friction plate is matched with and fixed to the semicircular clamping surface of the piston rod.
2. The torsion lock release device of claim 1, wherein the reaction support frame comprises two side rigid supports and a self-balancing pull rod, the self-balancing pull rod being connected between the two side rigid supports.
3. The torsion lock release device according to claim 1, wherein when the two-sided hydraulic cylinder is pressurized, the two piston rods and the friction plates are driven to move toward each other to lock the torsion bar input rod, and the friction plates and the torsion bar input rod are coaxial.
4. The torsion lock release device according to claim 3, wherein when the pressure of the hydraulic cylinders on both sides is released, the piston in the hydraulic cylinder drives the piston rod and the friction plate to return instantaneously, and the clamping force is released.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010313570.1A CN111366486A (en) | 2020-04-20 | 2020-04-20 | Torsion locking and releasing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010313570.1A CN111366486A (en) | 2020-04-20 | 2020-04-20 | Torsion locking and releasing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111366486A true CN111366486A (en) | 2020-07-03 |
Family
ID=71209600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010313570.1A Pending CN111366486A (en) | 2020-04-20 | 2020-04-20 | Torsion locking and releasing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111366486A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834327A (en) * | 2021-02-03 | 2021-05-25 | 哈尔滨瞬态加载试验设备技术开发有限公司 | Hopkinson torsion bar hydraulic clamping and releasing device |
| CN113029756A (en) * | 2021-03-29 | 2021-06-25 | 哈尔滨瞬态加载试验设备技术开发有限公司 | Hopkinson torsion bar hydraulic clamping and releasing device |
| EP4174470A1 (en) * | 2021-10-29 | 2023-05-03 | Rolls-Royce plc | System and method for applying dynamic loading to a test specimen |
-
2020
- 2020-04-20 CN CN202010313570.1A patent/CN111366486A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834327A (en) * | 2021-02-03 | 2021-05-25 | 哈尔滨瞬态加载试验设备技术开发有限公司 | Hopkinson torsion bar hydraulic clamping and releasing device |
| CN112834327B (en) * | 2021-02-03 | 2022-07-12 | 哈尔滨瞬态加载试验设备技术开发有限公司 | Hopkinson torsion bar hydraulic clamping and releasing device |
| CN113029756A (en) * | 2021-03-29 | 2021-06-25 | 哈尔滨瞬态加载试验设备技术开发有限公司 | Hopkinson torsion bar hydraulic clamping and releasing device |
| CN113029756B (en) * | 2021-03-29 | 2022-11-25 | 哈尔滨瞬态加载试验设备技术开发有限公司 | Hopkinson torsion bar hydraulic clamping and releasing device |
| EP4174470A1 (en) * | 2021-10-29 | 2023-05-03 | Rolls-Royce plc | System and method for applying dynamic loading to a test specimen |
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