CN112857974B - Horizontal asymmetric double-shaft pressure loading device - Google Patents
Horizontal asymmetric double-shaft pressure loading device Download PDFInfo
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- CN112857974B CN112857974B CN202110125058.9A CN202110125058A CN112857974B CN 112857974 B CN112857974 B CN 112857974B CN 202110125058 A CN202110125058 A CN 202110125058A CN 112857974 B CN112857974 B CN 112857974B
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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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
- G01N2203/0003—Steady
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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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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Abstract
The invention discloses a horizontal asymmetric double-shaft pressure loading device which comprises a platform base, a main shaft loading mechanism and a side pressure loading mechanism, wherein the main shaft loading mechanism comprises a first counter-force member, a first cross beam, a main shaft loading device and a main shaft pressure sensor; the first counter force member in the main shaft loading mechanism is an asymmetric pentagon and can provide a more balanced mechanical system for the 3-column structural frame, so that the compression central point and the tension central point of the first counter force member are closer, and the stability of the main shaft loading system is improved; the lateral pressure loading mechanism is characterized in that the second reaction member is asymmetric pentagon, the third reaction member is polygon, and a more balanced mechanical system can be provided for the lateral pressure loading mechanism with a two-column structure, so that the compression center point and the tension center point of the reaction member are closer to each other, and the stability of the lateral pressure loading system is improved.
Description
Technical Field
The invention relates to the field of rock mechanics experiments, in particular to a horizontal asymmetric double-shaft pressure loading device for a multi-angle remote sensing detection experiment in a double-shaft pressure process of a rock test piece.
Background
In rock mechanics experiments, if a conventional biaxial pressure loading device is used for remote sensing, two disadvantages exist: 1) the main shaft of the conventional indoor rock biaxial compression loading device is vertically loaded, the side shaft of the conventional indoor rock biaxial compression loading device is transversely loaded, when a rock test piece is subjected to biaxial compression, the free surfaces of the test piece which can be used for remote sensing detection are front and rear end surfaces, so that the remote sensing detector can only horizontally observe the electromagnetic radiation change of the compressed rock test piece, but the mode (vertical squint) is different from the mode (vertical squint) of satellite earth remote sensing detection, and the indoor experimental research and the practical satellite application research are not favorably combined. 2) In the conventional rock compression horizontal double-shaft loading device, a main shaft and a side shaft are in symmetrical four-column structures, the aim is to provide uniform pressure action for the rock test piece, simultaneously ensure that the loading system is subjected to symmetrical and uniform counter-force action, be beneficial to the stress stability of the loading system, but when the remote sensing detector is adopted to observe the free surface of the test piece, four beams are arranged in the hemispherical space of the free surface of the test piece, this seriously affects the field of view of remote sensing, and the existence of multiple beams is not only a redundant and complex noise source for the sensing itself, but also can not carry out multi-angle detection of a remote sensing instrument in experiments, particularly when detecting low-angle vertical squint, the free surface of the pressed rock test piece cannot be observed due to the influence of the cross beam in the field of view of the detector, so that the development and application of indoor experimental research results on the satellite remote sensing detection layer are greatly restricted.
Disclosure of Invention
The invention aims to overcome the technical problems in the prior art, and provides a horizontal asymmetric biaxial pressure loading test device for a rock test piece, which can simulate satellite earth observation and can not influence a remote sensing detection result.
In order to achieve the purpose, the invention provides a horizontal asymmetric double-shaft pressure loading device which comprises a platform base, a main shaft loading mechanism and a side pressure loading mechanism, wherein the main shaft loading mechanism comprises first counter-force components, first cross beams, a main shaft oil cylinder and a main shaft pressure sensor, the first counter-force components are two and symmetrically and fixedly arranged on the platform base, the two first counter-force components are in asymmetric pentagonal structures, the two first counter-force components are connected through the three first cross beams, the three first cross beams are asymmetrically arranged in the main shaft loading mechanism, the main shaft oil cylinder is fixedly arranged on one first counter-force component, and the main shaft pressure sensor is correspondingly arranged on the other first counter-force component; the side pressure loading mechanism comprises a second reaction force member, a third reaction force member, a second cross beam, a side pressure oiling cylinder and a side pressure sensor, the second reaction force member is of an asymmetric pentagonal structure arranged at the active loading shaft end of the side pressure loading mechanism, the third reaction force member is of an asymmetric polygonal structure arranged at the passive loading shaft end of the side pressure loading mechanism, the second reaction force member and the third reaction force member are connected through the two second cross beams, the two second cross beams are arranged up and down and are not positioned in the same vertical plane, the side pressure oil cylinder is fixedly arranged on the second reaction force member, and the side pressure sensor is correspondingly arranged on the third reaction force member; the bottom parts of the second counter-force member and the third counter-force member are respectively provided with a roller device, and each roller device comprises two rollers positioned at two ends of the bottom part of the corresponding counter-force member; the platform base is provided with guide rails corresponding to the rollers respectively, the side pressure loading mechanism can slide back and forth on the platform base along the guide rails, and the pressurizing directions of the main shaft oil cylinder and the side pressure oil cylinder are both in the horizontal direction and are vertical to each other.
Preferably, the first reaction member is an asymmetric pentagonal structure formed by obliquely cutting one right angle at the top of a rectangular reaction member; the second reaction member is an asymmetric pentagonal structure formed by cutting one right angle at the top of the rectangular reaction member into oblique sides on the basis of the rectangular reaction member.
Preferably, two of the first beams are respectively fixedly connected to two right angles at the bottom of the two first reaction members, and the other first beam is fixedly connected to a right angle at the top of the two first reaction members.
Preferably, the top of the third reaction force member comprises a first horizontal section, a second horizontal section and an inclined section, the first horizontal section is higher than the second horizontal section, one end of the second horizontal section is connected with the first horizontal section through a vertical section, the other end of the second horizontal section is connected with the inclined section, and the second horizontal section is arranged in parallel and level with the top of the lateral pressure loading end of the test piece.
Preferably, one end of one of the second beams is connected to a higher position of the third reaction member, and one end of the other of the second beams is connected to a right angle below the inclined section of the third reaction member; the other ends of the two second cross beams are respectively connected with the second counterforce components.
Preferably, the inner side edge of each roller is provided with a convex shape, and in the direction perpendicular to the rolling direction of the rollers, the distance between the convex edges of two rollers in two same roller devices is smaller than the distance between the inner sides of two parallel guide rails in the direction.
Preferably, three first crossbeams parallel arrangement, two second crossbeam parallel arrangement, and every first crossbeam and second crossbeam all set up perpendicularly.
Compared with the prior art, the invention has the following beneficial effects:
(1) when the horizontal asymmetric biaxial pressure loading device provided by the invention is used for experiments, the upper end surface of the test piece is a free surface, so that the horizontal asymmetric biaxial pressure loading device can be used for the remote sensing detector to perform overlook detection on the test piece and perform multi-angle detection on the upper surface of the test piece, and has the same mode as an actual satellite ground remote sensing detection mode.
(2) When the horizontal asymmetric double-shaft pressure loading device provided by the invention is used for experiments, the asymmetric pentagonal first reaction member in the main shaft loading mechanism can provide a more balanced mechanical system for a 3-column structural frame, so that the compression central point and the tension central point of the first reaction member are closer, and the stability of the main shaft loading system is improved.
(3) When the horizontal asymmetric double-shaft pressure loading device provided by the invention is used for experiments, the design of the asymmetric pentagonal second reaction member and the polygonal third reaction member in the side pressure loading mechanism can provide a more balanced mechanical system for the side pressure loading mechanism with a two-column structure, so that the compression central point and the tension central point of the first reaction member and the second reaction member are closer to each other, and the stability of the side pressure loading system is improved.
(4) When the horizontal asymmetric double-shaft pressure loading device provided by the invention is used for an experiment, a transverse moving space is reserved between the rolling wheel at the bottom of the side pressure loading mechanism and the guide rail, and the transverse moving can be carried out according to the self parallelism error of a test piece, so that the uniform stress taking the stress of the side shaft of the test piece as the axis direction is ensured, and the experiment precision is improved.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a horizontal asymmetric biaxial pressure loading device of the present invention;
FIG. 2 is a schematic structural diagram of the horizontal asymmetric biaxial pressure loading device in FIG. 1 in another direction;
the device comprises a platform base 1, a guide rail 1.1, a spindle loading mechanism 2, a first counter-force component 2.1, a first cross beam 2.2, a spindle pressure sensor 2.3, a spindle oil cylinder 2.4, a lateral pressure loading mechanism 3, a second counter-force component 3.1, a third counter-force component 3.2, a second cross beam 3.3, a lateral pressure oil cylinder 3.4, a roller 3.5 and a lateral pressure loading end 3.6.
Detailed Description
Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Referring to fig. 1 and 2, a horizontal asymmetric biaxial pressure loading device according to an embodiment of the present invention includes a platform base 1, a spindle loading mechanism 2, and a lateral pressure loading mechanism 3. In the main shaft loading mechanism, two steel sheets with the same thickness are placed in parallel to serve as two first reaction members 2.1, the two first reaction members are symmetrically and fixedly arranged on the top surface of the platform base, the two first reaction members are of asymmetric pentagonal structures, the two first reaction members are connected through three first cross beams 2.2, the three first cross beams are asymmetrically arranged in the main shaft loading mechanism, a main shaft oil cylinder 2.4 is fixedly arranged on one of the first reaction members, and a main shaft pressure sensor 2.3 is correspondingly arranged on the other first reaction member. Preferably, the first reaction member is an asymmetric pentagonal structure formed by hypotenuse-cutting one right angle at the top of a rectangular reaction member. Wherein two first crossbeams are two right angles of two first reaction member bottoms of fixed connection respectively, and the top right angle of two first reaction member of another first crossbeam fixed connection. Therefore, in the process of experimental ballasting, the tension borne by the three first cross beams is basically the same, and the balance and stability of the whole loading of the main shaft loading system are ensured.
In the lateral pressure loading mechanism, two steel plates with the same thickness are arranged in parallel to form a second reaction member 3.1 and a third reaction member 3.2, and the second reaction member and the third reaction member are fixedly connected through two second cross beams 3.3. The second reaction member is an asymmetric pentagonal structure arranged at the active loading shaft end of the side pressure loading mechanism, and the third reaction member is an asymmetric polygonal structure arranged at the passive loading shaft end of the side pressure loading mechanism. The two second cross beams are arranged up and down and are not positioned in the same vertical plane, the side pressure oil cylinder 3.4 is fixedly arranged on the second reaction force component, and a side pressure sensor (not shown in the figure) is correspondingly arranged on the third reaction force component. In this structural arrangement, the second reaction member is an asymmetric pentagonal structure formed by hypotenuse-cutting one right angle at the top of a rectangular reaction member. The top of third reaction component is including the first horizontal segment, second horizontal segment and the slope section that set gradually, and first horizontal segment is higher than the second horizontal segment, and the one end of second horizontal segment is passed through the vertical section and is linked to each other with first horizontal segment, and the other end of second horizontal segment links to each other with the slope section, and the top parallel and level setting of second horizontal segment and test piece side pressure loading end 3.6. One end of one of the second beams is connected with the higher position of the third reaction member, and one end of the other second beam is connected with a right angle below the inclined section of the third reaction member; the other ends of the two second cross beams are respectively connected with the second counterforce components. In the spindle loading mechanism and the side pressure loading mechanism, the pressurizing directions of the spindle oil cylinder 2.4 and the side pressure oil cylinder 3.4 are both in the horizontal direction and are vertical to each other; three first crossbeams parallel arrangement, two second crossbeam parallel arrangement, and every first crossbeam and second crossbeam all set up perpendicularly.
In a preferred embodiment of the invention, the bottom of the second and third counter force members are further provided with a roller arrangement each comprising two rollers 3.5 at each end of the bottom of the corresponding counter force member. The platform base is provided with guide rails 1.1 corresponding to the rollers respectively, and two rolling wheels in each roller device can slide back and forth on the corresponding guide rails on the platform base. Preferably, the inner side edge of each roller is arranged to be convex, and in the direction perpendicular to the rolling direction of the rollers, the distance between the convex edges of two rollers in two same roller devices is smaller than the distance between the inner sides of two parallel guide rails in the direction. In the structure, a space for lateral movement is reserved between the rolling wheel and the guide rail, and the whole transverse sliding can be carried out, so that the stress posture can be adjusted according to the parallelism error of the test piece in the experimental process, and the lateral stress of the test piece is ensured to be axial and uniform.
The above description 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 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 (5)
1. The horizontal asymmetric double-shaft pressure loading device is characterized by comprising a platform base (1), a main shaft loading mechanism (2) and a side pressure loading mechanism (3), wherein the main shaft loading mechanism comprises two first reaction members (2.1), two first cross beams (2.2), a main shaft oil cylinder (2.4) and a main shaft pressure sensor (2.3), the two first reaction members are symmetrically and fixedly arranged on the platform base, the two first reaction members are in an asymmetric pentagonal structure, the two first reaction members are connected through the three first cross beams, the three first cross beams are asymmetrically arranged in the main shaft loading mechanism, the main shaft oil cylinder is fixedly arranged on one of the first reaction members, and the main shaft pressure sensor is correspondingly arranged on the other first reaction member; the side pressure loading mechanism comprises a second counter force component (3.1), a third counter force component (3.2), a second cross beam (3.3), a side pressure oil cylinder (3.4) and a side pressure sensor, wherein the second counter force component is of an asymmetric pentagonal structure arranged at the active loading shaft end of the side pressure loading mechanism, the third counter force component is of an asymmetric polygonal structure arranged at the passive loading shaft end of the side pressure loading mechanism, the second counter force component and the third counter force component are connected through the two second cross beams, the two second cross beams are arranged up and down and are not positioned in the same vertical plane, the side pressure oil cylinder is fixedly arranged on the second counter force component, and the side pressure sensor is correspondingly arranged on the third counter force component; the bottoms of the second reaction member and the third reaction member are respectively provided with a roller device, and each roller device comprises two rollers (3.5) positioned at two ends of the bottom of the corresponding reaction member; the platform base is provided with guide rails (1.1) corresponding to the rollers respectively, the side pressure loading mechanism can slide back and forth on the platform base along the guide rails, and the pressurizing directions of the main shaft oil cylinder (2.4) and the side pressure oil cylinder (3.4) are both in the horizontal direction and are vertical to each other; the first reaction member is an asymmetric pentagonal structure formed by cutting a right angle at the top of the rectangular reaction member into a bevel edge on the basis of the rectangular reaction member; the second reaction member is an asymmetric pentagonal structure formed by cutting a right angle at the top of the second reaction member into a bevel edge on the basis of a rectangular reaction member; the top of the third counter-force component comprises a first horizontal section, a second horizontal section and an inclined section, the first horizontal section is higher than the second horizontal section, one end of the second horizontal section is connected with the first horizontal section through a vertical section, the other end of the second horizontal section is connected with the inclined section, and the second horizontal section is arranged in parallel with the top of the test piece side pressure loading end head (3.6).
2. The horizontal asymmetric biaxial pressure loading device as recited in claim 1, wherein two first beams are fixedly connected to two right angles at the bottom of two first reaction members, respectively, and the other first beam is fixedly connected to a right angle at the top of two first reaction members.
3. The horizontal asymmetric biaxial pressure loading device as recited in claim 1 wherein one end of one of the second beams is connected to the higher position of the third reaction member and one end of the other of the second beams is connected to a right angle below the inclined section of the third reaction member; the other ends of the two second cross beams are respectively connected with the second counterforce components.
4. The horizontal asymmetric biaxial pressure loading device as claimed in claim 1, wherein the inner edge of each roller is convex, and the distance between the convex edges of two rollers in two same roller devices is smaller than the distance between the inner sides of two parallel guide rails in the direction perpendicular to the rolling direction of the rollers.
5. The horizontal asymmetric biaxial pressure loading device as claimed in any one of claims 1 to 4, wherein three first beams are arranged in parallel, two second beams are arranged in parallel, and each first beam and each second beam are arranged vertically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110125058.9A CN112857974B (en) | 2021-01-29 | 2021-01-29 | Horizontal asymmetric double-shaft pressure loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110125058.9A CN112857974B (en) | 2021-01-29 | 2021-01-29 | Horizontal asymmetric double-shaft pressure loading device |
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| Publication Number | Publication Date |
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| CN112857974A CN112857974A (en) | 2021-05-28 |
| CN112857974B true CN112857974B (en) | 2022-02-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8291772B2 (en) * | 2010-06-23 | 2012-10-23 | WWN, Ltd. | Method and apparatus for testing shear fasteners used in downhole tools |
| CN103822830B (en) * | 2014-03-12 | 2015-12-16 | 中国电建集团中南勘测设计研究院有限公司 | A kind of rock true triaxial test loading system |
| CN204530479U (en) * | 2014-11-24 | 2015-08-05 | 上海天演建筑物移位工程股份有限公司 | The interim counter-force bracing or strutting arrangement of a kind of bridge jacking |
| CN206362643U (en) * | 2016-11-16 | 2017-07-28 | 东南大学 | The pure torsion test loading device of beam |
| CN108007763B (en) * | 2017-12-27 | 2023-07-28 | 山东大学 | Lateral double-shaft loading test device and method |
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