CN106762962A - A kind of linear actuator - Google Patents
A kind of linear actuator Download PDFInfo
- Publication number
- CN106762962A CN106762962A CN201710131980.2A CN201710131980A CN106762962A CN 106762962 A CN106762962 A CN 106762962A CN 201710131980 A CN201710131980 A CN 201710131980A CN 106762962 A CN106762962 A CN 106762962A
- Authority
- CN
- China
- Prior art keywords
- hydrostatic bearing
- bearing
- piston rod
- linear actuator
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention discloses a kind of linear actuator, including actuator cylinder, actuator cylinder constitutes accommodating chamber with the first hydrostatic bearing for being used to seal actuator cylinder top and for sealing the second hydrostatic bearing of actuator cylinder bottom, the multiple second bearing grease chambers formed in the multiple clutch shaft bearing grease chambers formed in first hydrostatic bearing and second hydrostatic bearing are radially symmetrical respectively, the piston rod being connected with testing machine be built in accommodating chamber and with the inwall clearance seal cooperation of the first hydrostatic bearing and the second hydrostatic bearing.Piston rod and the first hydrostatic bearing and the second hydrostatic bearing coordinate in clearance seal, will not be rubbed with the first hydrostatic bearing and the second hydrostatic bearing, so as to improve the work frequency response of actuator, the long service life of actuator is extended, the high-end equipment safety such as track traffic, Aero-Space, nuclear energy, mechanized equipment, the demand of reliability test can be effectively met.
Description
Technical field
The present invention relates to servo actuator technical field, more particularly to a kind of linear actuator.
Background technology
At present, the security of new material and new construction, reliability, endurancing checking and system performance test lead to
Overtesting machine is completed, and the main executing agency of testing machine is servo actuator, and servo actuator needs to be oriented to well
Sealing, can smoothly complete verification experimental verification.
The pilot seal of existing servo actuator is typically sealed using compounds such as rubber or carbon dusts, is being tested
Cheng Zhong, during piston rod movement, piston rod easily receives lateral forces, is rubbed with the seal such as rubber or carbon dust, friction
Damping has a great impact to the frequency response of servo actuator and service life, so as to cause the frequency response of servo actuator low, the life-span
It is short, it is impossible to meet the high-end equipment safety such as track traffic, Aero-Space, nuclear energy, mechanized equipment, reliability test well
Demand.
Therefore, how to provide a kind of work frequency response high, can bear certain side force, and long service life straight line start
Device, it is ability to meet the high-end equipment safety such as track traffic, Aero-Space, nuclear energy, mechanized equipment, the demand of reliability test
The technical problem of field technique personnel's urgent need to resolve.
The content of the invention
In view of this, it is an object of the invention to provide a kind of linear actuator, the frequency response that not only works is high, lateral force resistance
By force, and long service life, the high-end equipment safety such as track traffic, Aero-Space, nuclear energy, mechanized equipment can effectively be met
Property, the demand of reliability test.
To achieve the above object, the present invention provides following technical scheme：
A kind of linear actuator, including actuator cylinder, actuator cylinder with for sealing the actuator tin top
First hydrostatic bearing and the second hydrostatic bearing composition accommodating chamber for sealing the actuator cylinder bottom, the first static pressure axle
The multiple second bearing grease chambers formed in interior formed multiple clutch shaft bearing grease chambers and second hydrostatic bearing are held to distinguish
It is radially symmetrical, the piston rod being connected with testing machine be built in the accommodating chamber and with first hydrostatic bearing and
The inwall clearance seal of second hydrostatic bearing coordinates.
Preferably, multiple first throttles corresponding with the clutch shaft bearing grease chamber are provided with first hydrostatic bearing
Device, is provided with multiple second choke corresponding with the second bearing grease chamber on second hydrostatic bearing.
Preferably, along the axial direction of the piston portion of the piston rod be distributed with multiple tracks for seal damping slot.
Preferably, multiple tracks is axially distributed with for close along the inwall of first hydrostatic bearing and second hydrostatic bearing
The damping slot of envelope.
Preferably, the outer wall of the piston portion of the piston rod is coated with the coating for reducing friction, and described first
The inwall of hydrostatic bearing and second hydrostatic bearing is coated with the coating for reducing friction.
Preferably, the piston rod is double rod piston rods.
Preferably, also including being connected with second hydrostatic bearing, and for supporting the tail sleeve cylinder of the actuator cylinder.
Preferably, also it is provided with the base for detecting the piston including the base being connected with tail sleeve cylinder
The displacement transducer of the throw of lever.
Preferably, also including the displacement transducer magnet ring mounting cylinder being arranged on the piston rod, displacement transducer magnet ring
It is arranged in institute's displacement sensors magnet ring mounting cylinder.
Preferably, it is additionally provided with the valve plate for importing fluid on the outer wall of the actuator cylinder and is connected with the valve plate
Oil feeding system.
As can be seen from the above technical solutions, the linear actuator disclosed in the embodiment of the present invention, including actuator cylinder,
Actuator cylinder and the first hydrostatic bearing and the second static pressure for sealing actuator tin bottom for sealing actuator cylinder top
Bearing constitutes the multiple clutch shaft bearing grease chambers and institute's shape in second hydrostatic bearing formed in accommodating chamber, the first hydrostatic bearing
Into multiple second bearing grease chambers it is radially symmetrical respectively, the piston rod being connected with testing machine is built in accommodating chamber and equal
Inwall clearance seal with the first hydrostatic bearing and the second hydrostatic bearing coordinates.When experiment is carried out, fluid enters actuator cylinder
Inside, the piston rod vertical motion that is risen or declined is promoted, while fluid is formed also into the first hydrostatic bearing
Grease chamber and the grease chamber that is formed of the second hydrostatic bearing in.It is radially symmetrical when piston rod is subject to Lateral Force
Clutch shaft bearing grease chamber takes place change with the fluid amount in the second bearing grease chamber of radial symmetric distribution, in the effect of cross force
Under, the gap enlargement between the bearing grease chamber and piston rod of stress side, therefore the fluid of the hydrostatic bearing of stress side number of dropouts
Increase, when the fluid flow flowed away from bearing oil room in the unit interval increases, the fluid pressure of stress side reduces, with stress
The fluid pressure of side opposite side increases, and the pressure gap of both sides forces piston rod to be maintained at the center of actuator cylinder, living
Stopper rod and the first hydrostatic bearing and the second hydrostatic bearing coordinate in clearance seal, will not be with the first hydrostatic bearing and the second static pressure
Bearing rubs, and piston rod also coordinates with actuator cylinder in clearance seal, and both will not also rub, so as to improve work
The work frequency response of dynamic device, extends the long service life of actuator, can effectively meet track traffic, Aero-Space, nuclear energy, machine
High-end equipment safety, the demands of reliability test such as tool equipment.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below to embodiment or existing
The accompanying drawing to be used needed for technology description is briefly described, it is clear that, drawings in the following description are only this hair
Bright embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to carrying
The accompanying drawing of confession obtains other accompanying drawings.
Fig. 1 is a kind of structural representation of the linear actuator disclosed in the embodiment of the present invention；
Fig. 2 is the structural representation of another linear actuator disclosed in the embodiment of the present invention.
1- piston rods, the hydrostatic bearings of 2- first, 21- first throttle devices, 3- actuator cylinder, the hydrostatic bearings of 4- second, 41- the
Two flow controllers, 5- displacement transducer magnet ring mounting cylinders, 6- tail sleeves cylinder, 7- bases, 8- displacement transducers.
Specific embodiment
In view of this, core of the invention is to provide a kind of linear actuator, and the frequency response that not only works is high, lateral force resistance
By force, and long service life, the high-end equipment safety such as track traffic, Aero-Space, nuclear energy, mechanized equipment can effectively be met
Property, the demand of reliability test.
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
As shown in figure 1, the linear actuator disclosed in the embodiment of the present invention, including actuator cylinder 3, actuator cylinder 3 with
For seal actuator cylinder 3 tops the first hydrostatic bearing 2 and for seal actuator cylinder 3 bottoms the structure of the second hydrostatic bearing 4
Into accommodating chamber, formed in the multiple clutch shaft bearing grease chambers formed in the first hydrostatic bearing 2 and second hydrostatic bearing 4
Multiple second bearing grease chambers are radially symmetrical respectively, the piston rod 1 being connected with testing machine be built in accommodating chamber and with
The inwall clearance seal of the first hydrostatic bearing 2 and the second hydrostatic bearing 4 coordinates.
When experiment is carried out, fluid enters the inside of actuator cylinder 3, promote piston rod 1 risen or declined it is perpendicular
Straight motion, while in the grease chamber that is formed of the grease chamber that is formed also into the first hydrostatic bearing 2 of fluid and the second hydrostatic bearing 4.
When piston rod 1 is subject to Lateral Force, the second axle that radially symmetrical clutch shaft bearing grease chamber is distributed with radial symmetric
The fluid amount held in grease chamber takes place change, in the presence of cross force, between the bearing grease chamber and piston rod 1 of stress side
Gap enlargement, therefore the number of dropouts of the fluid of the hydrostatic bearing of stress side increases, when being flowed away from bearing oil room in the unit interval
Fluid flow when increasing, the fluid pressure of stress side reduces, and the fluid pressure with stress side opposite side increases, the pressure of both sides
Power difference forces piston rod 1 to be maintained at the center of actuator cylinder 3, the hydrostatic bearing 2 of piston rod 1 and first and the second static pressure axle
Hold 4 to coordinate in clearance seal, will not be rubbed with the first hydrostatic bearing 2 and the second hydrostatic bearing 4, so as to improve start
The work frequency response of device, extends the long service life of actuator, can effectively meet track traffic, Aero-Space, nuclear energy, machinery
High-end equipment safety, the demands of reliability test such as equipment.
Fig. 1 and Fig. 2 is refer to, multiple first throttles corresponding with clutch shaft bearing grease chamber are provided with the first hydrostatic bearing 2
Device 21, is provided with multiple second choke 41 corresponding with second bearing grease chamber on the second hydrostatic bearing 4, fluid is from oil supply system
It imported into first throttle device 21 and second choke 41, then first is entered into by first throttle device 21 and second choke 41
In bearing grease chamber and second bearing grease chamber.
It should be noted that first throttle device 21 can be arranged on the inwall of the first hydrostatic bearing 2, it is also possible to be arranged on
The outer wall of one hydrostatic bearing 2, second choke 41 can set the inwall of the first hydrostatic bearing 2, it is also possible to be arranged on second quiet
Last item holds 4 outer wall.
It is to be understood that along the axial direction of the piston portion of piston rod 1 be distributed with multiple tracks for seal damping slot, along the
The inwall of one hydrostatic bearing 2 and the second hydrostatic bearing 4 be axially distributed with multiple tracks for seal damping slot, damping slot can set
It is V-arrangement, it is also possible to be set to W shapes, the setting of damping slot further enhancing the effect of pilot seal.
It should be further stated that, the bar portion plating hard chromium on surface polishing of piston rod 1, outside the piston portion of piston rod 1
Wall is coated with the coating for reducing friction, and the inwall of the first hydrostatic bearing 2 and the second hydrostatic bearing 4 is coated with for reducing
, is there is special operation condition in the coating of friction, the big phenomenon of frictional force that the contact between metal can be avoided to cause due to coating
In the case of, coating is easier to be repaired.Therefore piston rod 1 can be formed with the first hydrostatic bearing 2 and the second hydrostatic bearing 4
Good gap coordinates, further to reduce friction, improves the work frequency response of linear actuator.
It should be noted that piston rod 1 is double rod structures, the high working efficiency of double rod piston rods is close with cylinder body
Envelope property is good, and frictional force is small.
Further, the linear actuator disclosed in the embodiment of the present invention, also including being connected with the second hydrostatic bearing 4,
And for supporting the tail sleeve cylinder 6 of actuator cylinder 3.It is to be understood that the aesthetic property in order to ensure outward appearance, tail sleeve cylinder 6 and second
Hydrostatic bearing 4 is internally connected by screw.
Further, also it is provided with base 7 for detecting the stroke of piston rod 1 including the base 7 being connected with tail sleeve cylinder 6
Displacement transducer 8.It is to be understood that displacement transducer 8 can be arranged on base 7, and use is set on the top of base 7
In the displacement transducer mounting cylinder for installing displacement transducer, it is also possible to through hole is opened up on base 7, by the base of displacement transducer 8
Seat is arranged on the outside of base 7, and is connected with the bottom face of base 7, while the pull bar of displacement transducer is stretched into by through hole
To inside piston rod 1, form is specifically set, need to be configured according to the particular type of displacement transducer 8 and structure.
In order to the displacement of further accurate measurement piston rod 1, displacement transducer magnet ring is provided with piston rod 1
Mounting cylinder 5, displacement transducer magnet ring is provided with displacement transducer magnet ring mounting cylinder 5, so as to more accurate measurement piston
The displacement of bar 1, calculates the stroke of piston rod 1, so as to draw effective test data.
It should be noted that being additionally provided with the valve plate for importing fluid on the outer wall of actuator cylinder 3 and being connected with valve plate
Oil feeding system, fluid enters into valve plate from oil feeding system first, then entered into from valve plate in actuator cylinder 3.
Each embodiment is described by the way of progressive in this specification, and what each embodiment was stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or uses the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The scope most wide for causing.
Claims (10)
1. a kind of linear actuator, it is characterised in that, including actuator cylinder (3), actuator cylinder (3) is described with for sealing
First hydrostatic bearing (2) on actuator cylinder (3) top and the second hydrostatic bearing for sealing described actuator cylinder (3) bottom
(4) the multiple clutch shaft bearing grease chambers and second hydrostatic bearing formed in accommodating chamber, first hydrostatic bearing (2) are constituted
(4) the multiple second bearing grease chambers formed in are radially symmetrical respectively, and the piston rod (1) being connected with testing machine is built in
Inwall clearance seal in the accommodating chamber and with first hydrostatic bearing (2) and second hydrostatic bearing (4) coordinates.
2. linear actuator according to claim 1, it is characterised in that be provided with first hydrostatic bearing (2) many
Individual first throttle device (21) corresponding with the clutch shaft bearing grease chamber, is provided with multiple and institute on second hydrostatic bearing (4)
State the corresponding second choke of second bearing grease chamber (41).
3. linear actuator according to claim 1, it is characterised in that along the axle of the piston portion of the piston rod (1)
To be distributed with multiple tracks for seal damping slot.
4. linear actuator according to claim 1, it is characterised in that along first hydrostatic bearing (2) and described
The inwall of two hydrostatic bearings (4) be axially distributed with multiple tracks for seal damping slot.
5. linear actuator according to claim 1, it is characterised in that the outer wall of the piston portion of the piston rod (1)
The coating for reducing friction is coated with, and the inwall of first hydrostatic bearing (2) and second hydrostatic bearing (4) is applied
It is covered with the coating for reducing friction.
6. linear actuator according to claim 1, it is characterised in that the piston rod (1) is double rod piston rods.
7. linear actuator according to claim 1, it is characterised in that also including with the second hydrostatic bearing (4) phase
Connect, and for supporting tail sleeve cylinder (6) of actuator cylinder (3).
8. linear actuator according to claim 7, it is characterised in that the also bottom including being connected with tail sleeve cylinder (6)
Seat (7), is provided with the displacement transducer (8) for detecting the piston rod (1) stroke on the base (7).
9. linear actuator according to claim 8, it is characterised in that also including being arranged on the piston rod (1)
Displacement transducer magnet ring mounting cylinder (5), displacement transducer magnet ring is arranged in institute's displacement sensors magnet ring mounting cylinder (5).
10. linear actuator according to claim 1, it is characterised in that also set up on the outer wall of actuator cylinder (3)
There are the valve plate for importing fluid and the oil feeding system being connected with the valve plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710131980.2A CN106762962A (en) | 2017-03-07 | 2017-03-07 | A kind of linear actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710131980.2A CN106762962A (en) | 2017-03-07 | 2017-03-07 | A kind of linear actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106762962A true CN106762962A (en) | 2017-05-31 |
Family
ID=58961158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710131980.2A Pending CN106762962A (en) | 2017-03-07 | 2017-03-07 | A kind of linear actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106762962A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112730079A (en) * | 2020-12-23 | 2021-04-30 | 山东黄金矿业科技有限公司深井开采实验室分公司 | Rock true triaxial dynamic compression shear test device and method under deep complex structure condition |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05256308A (en) * | 1992-03-11 | 1993-10-05 | Kayaba Ind Co Ltd | Power cylinder |
| CN200975378Y (en) * | 2006-09-27 | 2007-11-14 | 济南新三思动态试验技术有限公司 | Servo straight-line actuator |
| CN201407225Y (en) * | 2009-05-13 | 2010-02-17 | 沈阳中之杰流体控制系统有限公司 | High-frequency servo oil cylinder |
| CN201810604U (en) * | 2010-07-02 | 2011-04-27 | 西安华科航空液压有限公司 | Integrated servo actuator |
| CN201818580U (en) * | 2010-07-02 | 2011-05-04 | 西安华科航空液压有限公司 | Fixed blade servo actuator used by TRT (Blast Furnace Top Gas Recovery Turbine Unit) |
| CN102042281A (en) * | 2011-01-11 | 2011-05-04 | 浙江大学 | Oil cylinder of static pressure vibration exciter |
| CN102606537A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Containment spray pump |
| CN202867395U (en) * | 2012-08-14 | 2013-04-10 | 广州机械科学研究院有限公司 | Low-friction high-frequency sound hydraulic cylinder |
| CN103352825A (en) * | 2013-06-09 | 2013-10-16 | 华中科技大学 | Linear compressor |
-
2017
- 2017-03-07 CN CN201710131980.2A patent/CN106762962A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05256308A (en) * | 1992-03-11 | 1993-10-05 | Kayaba Ind Co Ltd | Power cylinder |
| CN200975378Y (en) * | 2006-09-27 | 2007-11-14 | 济南新三思动态试验技术有限公司 | Servo straight-line actuator |
| CN201407225Y (en) * | 2009-05-13 | 2010-02-17 | 沈阳中之杰流体控制系统有限公司 | High-frequency servo oil cylinder |
| CN201810604U (en) * | 2010-07-02 | 2011-04-27 | 西安华科航空液压有限公司 | Integrated servo actuator |
| CN201818580U (en) * | 2010-07-02 | 2011-05-04 | 西安华科航空液压有限公司 | Fixed blade servo actuator used by TRT (Blast Furnace Top Gas Recovery Turbine Unit) |
| CN102042281A (en) * | 2011-01-11 | 2011-05-04 | 浙江大学 | Oil cylinder of static pressure vibration exciter |
| CN102606537A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Containment spray pump |
| CN202867395U (en) * | 2012-08-14 | 2013-04-10 | 广州机械科学研究院有限公司 | Low-friction high-frequency sound hydraulic cylinder |
| CN103352825A (en) * | 2013-06-09 | 2013-10-16 | 华中科技大学 | Linear compressor |
Non-Patent Citations (1)
| Title |
|---|
| 徐滨士: "《面向二十一世纪的表面工程》", 30 November 1997, 机械工程出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112730079A (en) * | 2020-12-23 | 2021-04-30 | 山东黄金矿业科技有限公司深井开采实验室分公司 | Rock true triaxial dynamic compression shear test device and method under deep complex structure condition |
| CN112730079B (en) * | 2020-12-23 | 2022-04-12 | 山东黄金矿业科技有限公司深井开采实验室分公司 | Rock true triaxial dynamic compression shear test device and method under deep complex structure condition |
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Application publication date: 20170531 |