CN219974996U - Hydro-cylinder and rock test machine - Google Patents
Hydro-cylinder and rock test machine Download PDFInfo
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- CN219974996U CN219974996U CN202222565569.5U CN202222565569U CN219974996U CN 219974996 U CN219974996 U CN 219974996U CN 202222565569 U CN202222565569 U CN 202222565569U CN 219974996 U CN219974996 U CN 219974996U
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- oil cylinder
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- 238000012360 testing method Methods 0.000 title claims abstract description 52
- 239000011435 rock Substances 0.000 title claims abstract description 43
- 230000003068 static effect Effects 0.000 claims abstract description 39
- 230000008093 supporting effect Effects 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 239000000428 dust Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims 2
- 238000005259 measurement Methods 0.000 claims 2
- 239000003921 oil Substances 0.000 abstract description 75
- 239000010720 hydraulic oil Substances 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 7
- 230000002829 reductive effect Effects 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 239000010949 copper Substances 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000010727 cylinder oil Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000002706 hydrostatic effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000013142 basic testing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- 239000002689 soil Substances 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to the technical field of rock mechanical property test equipment, in particular to an oil cylinder and a rock test machine. The oil cylinder comprises a cylinder barrel, end covers and pistons, wherein the two sides of the cylinder barrel are connected with the end covers, each end cover is provided with a static pressure supporting ring which is a circular groove arranged along the circumferential direction of the end cover, a static pressure supporting cavity is formed between the static pressure supporting ring and each piston, each end cover is provided with an oil filling hole, and the oil filling holes are communicated with the static pressure supporting rings. The static pressure support ring is adopted to replace a copper or composite material support ring of a conventional oil cylinder, so that the oil cylinder can still work normally under the condition of large tonnage, the sliding friction between the oil cylinder and an end cover in the process of moving a piston can be reduced, the abrasion of the piston is further reduced, the service life is prolonged, and meanwhile, when the dynamic frequency is higher, the sliding friction between the piston and hydraulic oil is far smaller than the direct friction between the piston and other material support rings, so that the piston cannot generate larger friction under the high frequency.
Description
Technical Field
The utility model relates to the technical field of rock mechanical property test equipment, in particular to an oil cylinder and a rock test machine.
Background
Rock testing is an important means for studying rock mechanics, wherein uniaxial mechanics and triaxial mechanics test data are an important parameter of rock mechanics. The method can be used for completely simulating the mechanical properties of the rock and soil in the original ground stress state, and is an important basis for engineering design.
The rock test tester is basic test equipment for researching the mechanical properties of rock, and can be applied to a rock triaxial shear test with high confining pressure, a rock triaxial creep test under a constant confining pressure condition, a dynamic test of axial vibration loading and the like according to the rock test rules and the characteristics of engineering construction. The test parameters can be set according to the requirements, the whole test process is controlled by a microcomputer, test data are automatically recorded, and the test device is relatively economical and practical rock mechanical test equipment with relatively high automation degree. At present, rock mechanics test science extends towards directions such as multi-field stress, high pressure, high temperature, high frequency dynamic loading.
The rock test testing machine mainly comprises a main machine, a power oil source, an oil cooler, a control cabinet, a computer and the like, wherein the power oil source is a power output mechanism of the rock test testing machine, but in the field of the testing machine with large tonnage and high dynamic frequency, the conventional oil cylinder cannot meet the performance requirements of high precision and quick dynamic response. The higher the frequency is, the faster the linear speed of the piston of the oil cylinder is, the local friction heat between the piston and the support ring in the conventional oil cylinder is large, the supporting performance is affected, the output performance and the position accuracy of the piston are affected, the larger the tonnage is, the larger the friction force generated by the piston and the support ring is, and the dynamic output performance is seriously affected by the friction force particularly in high-frequency output.
Disclosure of Invention
The utility model aims at: aiming at the problems existing in the prior art, the oil cylinder is provided to replace the conventional oil cylinder, so that the rock test tester can realize the purposes of high-frequency response, high-precision execution and long-service-life operation.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides an oil cylinder, includes cylinder, end cover, piston, the cylinder both sides are all connected the end cover, every offer the static pressure support ring on the end cover, the static pressure support ring is followed the ring shape recess that end cover circumference set up, the static pressure support ring with form the static pressure support chamber between the piston, every offer the oil filler point on the end cover, the oil filler point with the static pressure support ring intercommunication.
The novel oil cylinder is characterized in that a static pressure supporting ring is adopted to replace a supporting ring made of copper or made of composite materials of a conventional oil cylinder, a static pressure supporting cavity is formed between the static pressure supporting ring and a piston, hydraulic oil with certain pressure is injected into a static pressure supporting cabin through an oil injection hole, the hydraulic oil can generate radial compression counter force to the piston, the piston is suspended at the center of the static pressure supporting cavity, the piston can be supported, the oil cylinder can still normally work under the condition of large tonnage, sliding friction between the oil cylinder and an end cover in the moving process of the piston can be reduced, further abrasion of the piston is reduced, the service life is prolonged, meanwhile, when dynamic frequency is higher, the sliding friction between the piston and the hydraulic oil is far smaller than the direct friction between the piston and other material supporting rings, so that large friction can not be generated under high frequency.
As a preferable scheme of the utility model, a piston sealing ring is arranged between each end cover and each piston, and high-pressure oil in the cylinder barrel is prevented from leaking to the outside along the piston by the piston sealing ring.
As a preferable scheme of the utility model, a dust ring is arranged between each end cover and each piston, and impurities outside the oil cylinder are prevented from entering the oil cylinder through the dust ring, so that the surfaces of the piston and the cylinder barrel are prevented from being damaged by the impurities.
As a preferable scheme of the utility model, each end cover is connected with the cylinder barrel through a connecting bolt, and the end covers on two sides are connected with the cylinder barrel through connecting bolts, so that the reverse force of hydraulic oil from the inner cavity of the cylinder barrel to the end covers is counteracted.
As a preferable scheme of the utility model, a cylinder barrel sealing ring is arranged at the joint of each end cover and the cylinder barrel, so that the tightness between the end cover and the cylinder barrel is enhanced.
As a preferable scheme of the utility model, at least two oil cylinder oil holes are arranged on the cylinder barrel, external hydraulic oil is used for carrying out the inner cavity of the cylinder barrel through the oil cylinder oil holes, and the oil cylinder generates accurate push-pull force and walking displacement by controlling the flow and pressure of the hydraulic oil injected into the inner cavity of the cylinder barrel.
The rock test testing machine comprises a host machine, wherein the host machine comprises a pressure head for rock test testing, and further comprises an oil cylinder, and the oil cylinder drives the pressure head to move.
The oil cylinder is used for replacing a conventional oil cylinder, so that the rock testing machine can realize the purposes of high-frequency response, high-precision execution and long-service-life operation, and can be used as an actuating mechanism of the rock testing machine, particularly can realize large tonnage and high frequency output in the application of the high-frequency dynamic rock testing machine, and the frequency can reach more than 1000 Hz.
As a preferable scheme of the utility model, the oil cylinder is connected with a bracket, and the bracket is used for supporting the oil cylinder.
In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:
1. the novel oil cylinder is characterized in that a static pressure supporting ring is adopted to replace a supporting ring made of copper or made of composite materials of a conventional oil cylinder, a static pressure supporting cavity is formed between the static pressure supporting ring and a piston, hydraulic oil with certain pressure is injected into a static pressure supporting cabin through an oil injection hole, the hydraulic oil can generate radial compression counter force to the piston, the piston is suspended at the center of the static pressure supporting cavity, the piston can be supported, the oil cylinder can still normally work under the condition of large tonnage, sliding friction between the oil cylinder and an end cover in the moving process of the piston can be reduced, further abrasion of the piston is reduced, the service life is prolonged, meanwhile, when dynamic frequency is higher, the sliding friction between the piston and the hydraulic oil is far smaller than the direct friction between the piston and other material supporting rings, so that large friction can not be generated under high frequency.
2. The rock testing machine adopts the oil cylinder to replace the conventional oil cylinder, so that the rock testing machine can realize the purposes of high-frequency response, high-precision execution and long-service-life operation.
Drawings
Fig. 1 is a schematic diagram of a cylinder structure according to the present utility model.
Fig. 2 is a partial enlarged view of fig. 1.
Fig. 3 is a schematic diagram of a hydrostatic support cavity of the present utility model.
Fig. 4 is a schematic structural view of the rock testing machine of the present utility model.
The marks in the figure: the hydraulic cylinder comprises a 1-cylinder barrel, a 2-end cover, a 3-static pressure supporting ring, a 4-piston, a 5-cylinder oil hole, a 6-oil hole, a 7-piston sealing ring, an 8-dust ring, a 9-cylinder barrel sealing ring, a 10-connecting bolt, an 11-static pressure supporting cavity, a 12-host, a 13-power oil source, a 14-oil cooler, a 15-control cabinet, a 16-computer, a 121-displacement sensor, a 122-servo valve, a 123-load sensor, a 124-pressure head, a 125-deformation measuring device and a 126-bracket.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Example 1
As shown in fig. 1-2, an oil cylinder comprises a cylinder barrel 1, end covers 2 and a piston 4, wherein the two sides of the cylinder barrel 1 are connected with the end covers 2, each end cover 2 is provided with a static pressure support ring 3, each static pressure support ring 3 is a circular groove arranged along the circumferential direction of the end cover 2, each end cover 2 is provided with an oil filling hole 6, and the oil filling holes 6 are communicated with the static pressure support rings 3.
The static pressure supporting cavity 11 is formed between the static pressure supporting ring 3 and the piston 4, as shown in fig. 3, hydraulic oil with a certain pressure is filled into the static pressure supporting cavity 11 through the oil filling hole 6, the pressure of the hydraulic oil can generate a reverse pressure on the end cover 2 and the piston 4 respectively, the oil cylinder is rigidly connected with the support 126 through bolts, the support 126 is fixed on the oil cylinder and is not moved, as shown in fig. 4, the end cover 2 rigidly connected on the oil cylinder through bolts is not influenced by counter force, the other counter force is the radial compression reaction of the hydraulic oil on the piston 4, the counter force of the radial compression of the hydraulic oil on the piston 4 can enable the piston 4 to suspend in the center of the static pressure supporting cavity 11, so that metal friction between the piston 4 and the end cover 2 is reduced, and the magnitude of the counter force is in proportion to the cross section area of the static pressure supporting cavity 11 and the pressure of the hydraulic oil.
Meanwhile, the static pressure supporting cavity 11 can well reduce sliding friction force in the moving process of the piston 4, because the moving resistance of the piston 4 in the linear direction is mainly adhesive force between hydraulic oil and the surface of the piston 4, the adhesive force is related to the roughness of the surface of the piston 4 and the viscosity of the hydraulic oil, and the adhesive force is far smaller than the sliding friction force between the piston 4 and other material supporting rings.
In addition, the static pressure supporting ring 3 is arranged on the end cover 2, so that the pistons 4 can be supported at two ends, and the supporting performance is better.
Further, the hydrostatic support cylinder adopting the hydrostatic support ring 3 can be started under liquid lubrication even when the speed is low and zero, the starting power is low, the hydraulic support cylinder is particularly beneficial to the movement of machines and heavy equipment which are required to be started under the bearing, meanwhile, the piston 4 can always work under the state of hydraulic oil lubrication, the piston is not worn during normal use, the precision is good in maintenance, the service life is long, and the piston 4 works under the surrounding of hydraulic oil, so that the movement precision is high, the oil film rigidity is high, the damping performance is good, and the oil film vibration relieving effect is realized at high speed.
Example 2
On the basis of embodiment 1, as shown in fig. 1, a piston sealing ring 7 is arranged between each end cover 2 and the piston 4, high-pressure oil inside the cylinder barrel 1 is prevented from penetrating to the outside along the piston by the piston sealing ring 7, a dust ring 8 is arranged between each end cover 2 and the piston 4, impurities outside the oil cylinder are prevented from entering the oil cylinder by the dust ring 8, and damage to the surfaces of the piston 4 and the cylinder barrel caused by the impurities is prevented.
The static pressure support ring 3 is arranged on the end cover 2 and is close to the middle part of the cylinder barrel 1, the dust ring 8 is arranged on the end cover 2 and is far away from the middle part of the cylinder barrel 1, and the piston sealing ring 7 is arranged on the end cover 2 and is positioned between the static pressure support ring 3 and the dust ring 8.
Example 3
On the basis of embodiment 1 or embodiment 2, as shown in fig. 4, a rock testing machine comprises a main machine 12, wherein the main machine 12 comprises a pressure head 124 for rock testing, and further comprises an oil cylinder as in embodiment 1 or embodiment 2, the oil cylinder drives the pressure head 124 to move through a piston 4, so that rock testing experiments are carried out, and the oil cylinder is rigidly connected with a bracket 126 through bolts so as to ensure the stability of the oil cylinder during operation.
The load sensor 123 is arranged between the pressure head 124 and the piston 4, the displacement sensor 121 is arranged at one end of the piston 4 far away from the pressure head 124, the deformation measuring device 125 is arranged at a corresponding position below the pressure head 124, the deformation measuring device 125 is rigidly connected with the support 126 through bolts, when a rock test is carried out, the magnitude of the force of the piston 4 on a test piece is measured in real time through the load sensor 123, the displacement of the movement of the piston 4 is detected in real time through the displacement sensor 121, and the deformation of the test piece is measured through the deformation measuring device 125.
A servo valve 122 is arranged on one side of the oil cylinder, the servo valve 122 is communicated with the oil cylinder oil hole 5 and the oil filling hole 6, the flow and the pressure of hydraulic oil in the cylinder barrel 1 are controlled by the servo valve, so that the oil cylinder generates accurate push-pull force and walking displacement, and the pressure of the hydraulic oil entering the static pressure supporting cavity 11 is controlled by the servo valve, so that the static pressure supporting cavity 11 can effectively exert the supporting effect.
As shown in fig. 4, the rock testing machine further comprises a power oil source 13, a cold oil machine 14, a control cabinet 15 and a computer 16, wherein the power oil source 13 provides required pressure and flow for an oil cylinder of the host 12 so as to meet the requirement that the rock testing machine dynamically loads according to a certain frequency and amplitude, the required pressure and flow can be adjusted, the cold oil machine 14 controls the oil temperature of hydraulic oil, the oil cylinder is prevented from influencing precision due to the change of the oil temperature, the control cabinet 15 gives out instructions to the oil cylinder of the host 12, smooth conversion among three control modes of stress, displacement and strain can be realized, and the computer 16 has real-time tracking, monitoring and data processing functions for control parameters such as load, displacement and deformation, and is a terminal control device for controlling the whole operation of the rock testing machine and monitoring the running process of the rock testing machine.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (6)
1. A rock testing machine comprising a main machine (12), the main machine (12) comprising a ram (124) for rock testing, characterized by further comprising a cylinder, the cylinder driving the ram (124) to move;
the oil cylinder comprises a cylinder barrel (1), end covers (2) and pistons (4), wherein two sides of the cylinder barrel (1) are connected with the end covers (2), each end cover (2) is provided with a static pressure support ring (3), each static pressure support ring (3) is a circular groove arranged along the circumferential direction of the end cover (2), a static pressure support cavity (11) is formed between each static pressure support ring (3) and each piston (4), each end cover (2) is provided with an oil filling hole (6), and each oil filling hole (6) is communicated with each static pressure support ring (3);
the oil cylinder is connected with a bracket (126), and the bracket (126) is used for supporting the oil cylinder;
load sensor (123) are installed between pressure head (124) with piston (4), piston (4) keep away from one end installation displacement sensor (121) of pressure head (124), the below of pressure head (124) corresponds position installation deformation measurement device (125), deformation measurement device (125) with support (126) pass through bolt rigid connection.
2. A rock testing machine as claimed in claim 1, characterised in that a piston sealing ring (7) is provided between each end cap (2) and the piston (4).
3. A rock testing machine as claimed in claim 2, characterised in that a dust ring (8) is provided between each end cap (2) and the piston (4).
4. A rock testing machine as claimed in claim 1, characterized in that each end cap (2) is connected to the cylinder (1) by means of a connecting bolt (10).
5. A rock testing machine as claimed in claim 4, characterised in that a cylinder sealing ring (9) is provided at the junction of each end cap (2) with the cylinder (1).
6. Rock testing machine according to claim 1, characterized in that the cylinder (1) is provided with at least two cylinder bores (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222565569.5U CN219974996U (en) | 2022-09-27 | 2022-09-27 | Hydro-cylinder and rock test machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222565569.5U CN219974996U (en) | 2022-09-27 | 2022-09-27 | Hydro-cylinder and rock test machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219974996U true CN219974996U (en) | 2023-11-07 |
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ID=88582553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222565569.5U Active CN219974996U (en) | 2022-09-27 | 2022-09-27 | Hydro-cylinder and rock test machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219974996U (en) |
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- 2022-09-27 CN CN202222565569.5U patent/CN219974996U/en active Active
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