CN113983110A - Machine-liquid combined buffer for rock burst - Google Patents
Machine-liquid combined buffer for rock burst Download PDFInfo
- Publication number
- CN113983110A CN113983110A CN202111170856.XA CN202111170856A CN113983110A CN 113983110 A CN113983110 A CN 113983110A CN 202111170856 A CN202111170856 A CN 202111170856A CN 113983110 A CN113983110 A CN 113983110A
- Authority
- CN
- China
- Prior art keywords
- buffer
- buffer element
- hydraulic cylinder
- cylinder
- end cover
- 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.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/002—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising at least one fluid spring
-
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/021—Installations or systems with accumulators used for damping
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
-
- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
-
- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/007—Overload
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a machine-liquid combined buffer facing rock burst, which is characterized by comprising a single-rod hydraulic cylinder, wherein two ends of the single-rod hydraulic cylinder are respectively connected with a buffer device, one oil cavity of the single-rod hydraulic cylinder is respectively connected with a first energy accumulator, a first check valve and a safety overflow valve, the other oil cavity of the single-rod hydraulic cylinder is connected with a second check valve, the first check valve and the second check valve are connected with an oil tank and an oil source through a first reversing valve, and the single-rod hydraulic cylinder is fixedly connected with a hydraulic chuck. The hydraulic buffer device has the advantages that through short-time short-distance buffering of the mechanical buffer device and long-time long-distance buffering of the hydraulic cylinder buffer device, impact energy of rock burst is converted into elastic potential energy of the mechanical buffer device and pressure energy of the hydraulic buffer device; the combined mechanical-hydraulic buffer can realize efficient absorption of instantaneous and long-term impact energy, and meanwhile, the combined mechanical-hydraulic buffer is provided with an emergency braking device, so that emergency braking of the hydraulic cylinder can be realized under the condition that the buffer is overloaded and fails.
Description
Technical Field
The application belongs to the field of control of machine-liquid combined buffers, and particularly relates to a machine-liquid combined buffer for rock burst.
Background
The traditional hydraulic cylinder buffer device realizes the buffer of rock burst based on the unloading function of the safety overflow valve, the traditional hydraulic cylinder buffer device has lower response speed of the safety overflow valve for buffering transient rock burst, great buffering pressure is easily generated in a hydraulic cylinder, and faults such as sealing failure, cylinder body cracking, valve group damage and the like are easily caused by transient heavy-load rock burst; meanwhile, the traditional hydraulic cylinder does not have an emergency braking function, the hydraulic cylinder is easy to fail under long-time ground pressure impact, the system of the whole machine is further damaged, and even the safety of operators is threatened under severe conditions.
Disclosure of Invention
Based on the problems, the application designs a hydraulic buffer device which can convert the impact energy of rock burst into the elastic potential energy of the mechanical buffer device and the pressure energy of the hydraulic buffer device through the short-time short-distance buffer of the mechanical buffer device and the long-time long-distance buffer of the hydraulic cylinder buffer device; the combined mechanical-hydraulic buffer can realize efficient absorption of instantaneous and long-term impact energy, and meanwhile, the combined mechanical-hydraulic buffer is provided with an emergency braking device, so that emergency braking of the hydraulic cylinder can be realized under the condition that the buffer is overloaded and fails. The technical scheme is as follows:
the utility model provides a buffer is united to machine liquid towards rock burst, includes single play pole pneumatic cylinder, single play pole pneumatic cylinder both ends are connected one-level buffer and tertiary buffer respectively, one of them oil pocket of single play pole pneumatic cylinder is connected with energy storage ware one, check valve one and safe overflow valve respectively, and its another oil pocket is connected with check valve two, check valve one, check valve two are passed through switching-over valve one and are connected with oil tank and oil supply, single play pole pneumatic cylinder and hydraulic chuck fixed connection to through piston rod earrings and external connection.
The single-rod hydraulic cylinder is connected with a displacement sensor, the displacement sensor is connected with a controller, the controller is connected with a second reversing valve, the second reversing valve is respectively connected with a plunger cylinder group, an energy accumulator II, a one-way valve III and an oil tank, and the one-way valve III is connected with an oil source.
More preferably, the first-stage damper and the third-stage damper are any one of various types of flexible mechanical dampers such as an S-type mechanical damper, a spring-type mechanical damper, a slotted ring-type mechanical damper, a lattice-type mechanical damper, a cantilever beam-type mechanical damper, and a soft material mechanical damper.
Further preferably, the S-shaped mechanical buffer device comprises an S-shaped mechanical buffer element, the S-shaped mechanical buffer element is of a cylindrical structure, two square grooves are formed in the two vertically symmetrical sides of the cylinder, and threaded columns are arranged at the upper end and the lower end of the cylinder.
Preferably, the spring type mechanical buffer device comprises a front buffer spring end cover and a rear buffer spring end cover embedded with the front buffer spring end cover, a buffer spring is arranged between the front buffer spring end cover and the rear buffer spring end cover, and two ends of the buffer spring are respectively fixed on guide posts at the centers of the front buffer spring end cover and the rear buffer spring end cover.
Further preferably, the slotted ring type mechanical buffering device comprises a slotted ring type buffering element front end cover and a slotted ring type buffering element rear end cover, a slotted ring type buffering element is arranged between the slotted ring type buffering element front end cover and the slotted ring type buffering element rear end cover, the slotted ring type buffering element front end cover is connected with the slotted ring type buffering element through a bolt, the slotted ring type buffering element is connected with the slotted ring type buffering element rear end cover through a bolt, the slotted ring type buffering element is of a circular ring structure, and a plurality of rectangular grooves with semicircular two ends are circumferentially arranged on the slotted ring type buffering element.
Further preferably, the grid type mechanical buffer device comprises a grid buffer element front end cover and a grid buffer element rear end cover, a grid buffer element is arranged between the grid buffer element front end cover and the grid buffer element rear end cover, the grid buffer element front end cover is connected with the grid buffer element through a bolt, the grid buffer element is connected with the grid buffer element rear end cover through a bolt, the grid buffer element is a cylinder, and the periphery of the grid buffer element is provided with a diamond-shaped groove.
Preferably, the cantilever beam type mechanical buffer device comprises a cantilever beam buffer element I and a cantilever beam buffer element II connected with the cantilever beam buffer element I, wherein the cantilever beam buffer element I is cylindrical, threaded holes are formed in the periphery of the cantilever beam buffer element I, a threaded column is formed in the outer side of the cylindrical shape, and a circular groove is formed in the other side of the cylindrical shape; the second cantilever beam buffering element is cylindrical, a threaded column is arranged on the side face of the cylinder, a plurality of square beams are arranged on the periphery of the cylinder, a square hole is formed in the center of each square beam, and a threaded hole is formed in each square beam.
Preferably, the soft material mechanical buffer device comprises a low young modulus material buffer element, a main body of the low young modulus material buffer element is a cylinder, threaded columns are arranged on two sides of the cylinder, the material is a low young modulus material, and the young modulus of the material is about 10 to 130 Gpa.
Preferably, the first reversing valve is located at a middle position, the first check valve and the second check valve are in a one-way conduction state, the rod cavity and the rodless cavity of the single-rod hydraulic cylinder are in a disconnection state, the single-rod hydraulic cylinder is in static self-locking, when a piston rod of the single-rod hydraulic cylinder is subjected to rock burst, the piston rod of the single-rod hydraulic cylinder contracts, emulsion in the rodless cavity of the single-rod hydraulic cylinder flows into the first energy accumulator, when the pressure of the emulsion in the first energy accumulator is higher than the preset pressure of the safety overflow valve, the emulsion in the rodless cavity of the single-rod hydraulic cylinder and the emulsion in the first energy accumulator flow into the safety overflow valve through an opening A of the safety overflow valve together, and the emulsion is directly discharged into the atmosphere after passing through the safety overflow valve, so that secondary buffering of the rock burst is realized.
Further preferably, the emergency braking process of the single-rod hydraulic cylinder is as follows:
when the displacement sensor detects that the single-rod hydraulic cylinder is in an abnormal working state, the motion acceleration of the piston rod of the single-rod hydraulic cylinder is larger than a preset value and the piston rod reaches an early warning position, the controller controls the reversing valve II to be in the right position, emulsion in the oil source respectively enters the reversing valve II and the energy accumulator II after passing through the check valve III, the emulsion flows into a rodless cavity of the plunger cylinder group after passing through the reversing valve II, the left hydraulic clamping jaw and the right hydraulic clamping jaw of the hydraulic chuck are respectively driven by the movement of the plunger cylinder group to rotate around the rotating shafts of the left hydraulic clamping jaw and the right hydraulic clamping jaw, the left hydraulic clamping jaw and the right hydraulic clamping jaw tightly hold a piston rod of the single-rod hydraulic cylinder, and the piston rod of the single-rod hydraulic cylinder rapidly stops moving under the action of friction force, when the oil source fails unexpectedly, the second energy accumulator can be used as a substitute oil source to provide high-pressure emulsion for emergency braking, so that emergency braking of the single-rod hydraulic cylinder in an abnormal working state is realized.
Advantageous effects
The mechanical buffer device and the buffer hydraulic cylinder are integrated into a whole, various replaceable mechanical buffer elements are designed, and different geological environments (rock burst) can be adapted by replacing different mechanical buffer elements or adjusting the design parameters of the mechanical buffer elements; meanwhile, the invention adopts a mechanical buffer device and a hydraulic cylinder buffer device to realize three-stage buffer to transient rock burst, realizes short-time short-distance primary buffer to the rock burst by a mechanical buffer element close to the piston rod, realizes long-time long-distance secondary buffer to the rock burst by a hydraulic buffer circuit based on an energy accumulator and a safety overflow valve, realizes short-time short-distance three-stage buffer to the rock burst by a mechanical buffer element close to the bottom of the hydraulic cylinder, realizes three-stage buffer action to the transient rock burst under different geological environments by optimizing the matching of rigidity and stroke between the three-stage buffer devices, and ensures the safety of a valve group and the hydraulic cylinder in a hydraulic system; meanwhile, an emergency braking device arranged on the mechanical-hydraulic combined buffer can prevent the whole machine from being systematically damaged under the condition that the hydraulic cylinder is overloaded and fails, and safety guarantee is provided for operating personnel.
Drawings
FIG. 1 is a hydraulic control schematic;
FIG. 2 is a mechanical block diagram of an S-shaped buffer solution;
FIG. 3 is a mechanical block diagram of a spring cushioning solution;
FIG. 4 is a mechanical block diagram of a slotted ring cushioning solution;
FIG. 5 is a mechanical block diagram of a grid cushioning scheme;
FIG. 6 is a mechanical block diagram of a cantilever beam buffering scheme;
FIG. 7 is a mechanical structure diagram of a cushioning arrangement for a soft material;
fig. 8 is a schematic view of a hydraulic chuck structure.
In the figure, 1-a first energy accumulator, 2-a displacement sensor, 3-a double-acting single-rod hydraulic cylinder, 4-a safety overflow valve, 5-a first hydraulic control check valve, 6-a second hydraulic control check valve, 7-a first plunger cylinder, 8-a second plunger cylinder, 9-a controller, 10-a first reversing valve, a second reversing valve, 12-an energy accumulator, 13-a third check valve, 14-an oil source, 15-an oil tank, 16-a hydraulic chuck, 161-a left hydraulic chuck, 162-a right hydraulic chuck, 163-a hydraulic chuck base, 164-a return spring, 17-a piston rod lug ring, 18-a first-stage S-type mechanical buffer element, 181-a connecting threaded column, 182-a connecting threaded column, 19-a third-stage S-type mechanical buffer element and 20-a front end cover of a first-stage buffer spring, 21-first-stage buffer spring, 22-first-stage buffer spring rear end cap, 23-third-stage buffer spring front end cap, 231-connecting threaded post, 24-third-stage buffer spring, 25-third-stage buffer spring rear end cap, 251-connecting threaded post, 26-first-stage slotted ring buffer element front end cap, 27-first-stage slotted ring buffer element, 28-first-stage slotted ring buffer element rear end cap, 29-third-stage slotted ring buffer element front end cap, 30-third-stage slotted ring buffer element, 31-first-stage slotted ring buffer element rear end cap, 32-first-stage grid buffer element front end cap, 33-first-stage grid buffer element, 34-first-stage grid buffer element rear end cap, 35-third-stage grid buffer element front end cap, 36-third-stage grid buffer element, the rear end cover of the 37-third-level grid buffer element, the first 38-first-level cantilever beam buffer element, the second 39-first-level cantilever beam buffer element, the first 40-third-level cantilever beam buffer element, the second 41-third-level cantilever beam buffer element, the second 42-first-level low Young modulus material buffer element and the third 43-level low Young modulus material buffer element.
Detailed Description
The following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application.
A mechanical-hydraulic combined buffer facing rock burst comprises a single-rod hydraulic cylinder 3 (a double-acting single-rod hydraulic cylinder 3), wherein two ends of the single-rod hydraulic cylinder are respectively connected with a first-stage buffer device and a third-stage buffer device, one oil cavity of the single-rod hydraulic cylinder 3 is respectively connected with a first energy accumulator 1, a first check valve 5 (a first hydraulic control check valve 5) and a safety overflow valve 4, the other oil cavity of the single-rod hydraulic cylinder is connected with a second check valve 6 (a second hydraulic control check valve 6), the first check valve 5 and the second check valve 6 are connected with an oil tank 14 and an oil source 15 through a first reversing valve 10 (a three-position four-way electromagnetic reversing valve 10), and the single-rod hydraulic cylinder 3 is fixedly connected with a hydraulic chuck 16 and is connected with the outside through a piston rod earring 17. The single-rod hydraulic cylinder 3 is connected with the displacement sensor 2, the displacement sensor 2 is connected with the controller 9, the controller 9 is connected with the second reversing valve 11 (the two-position three-way electromagnetic reversing valve 11), the second reversing valve 6 is connected with the plunger cylinder group (the first plunger cylinder 7 and the second plunger cylinder 8), the second energy accumulator 12, the third one-way valve 13 and the oil tank 14 respectively, and the third one-way valve 13 is connected with the oil source 14.
In fig. 1, for clarity of connection between components, a component-plus-letter representation method is used, such as a port P of the three-position four-way electromagnetic directional valve 10, which is indicated as 10P in the figure.
A hydraulic system circuit: the oil source 14 is respectively connected with a port P (10P) of the three-position four-way electromagnetic directional valve 10 and a port A (13A) of the check valve III 13; the oil tank 15 is respectively connected with a T port (10T) of the three-position four-way electromagnetic directional valve 10 and a C port (11C) of the two-position three-way electromagnetic directional valve 11; the port A (10A) of the three-position four-way electromagnetic directional valve 10 is respectively connected with the port A (5A) of the hydraulic control one-way valve I5 and the port C (6C) of the hydraulic control one-way valve II 6; a port B (5B) of the hydraulic control one-way valve I5 is respectively connected with a port A (1A) of the energy accumulator I1, a port A (3A) of the double-acting single-rod hydraulic cylinder 3 and a port 4A (4A) of the safety overflow valve 4; a port 4B (4B) of the safety overflow valve 4 is connected with the atmospheric environment; a port B (10B) of the three-position four-way electromagnetic directional valve 10 is respectively connected with a port C (5C) of the hydraulic control one-way valve I5 and a port A (6A) of the hydraulic control one-way valve II 6; a port B (6B) of the hydraulic control one-way valve II 6 is connected with a port B (3B) of the double-acting single-rod hydraulic cylinder 3; a port B (13B) of the check valve III 13 is respectively connected with a port A (11A) of the two-position three-way electromagnetic directional valve 11 and a port A (12A) of the energy accumulator II 12; and a port B (11B) of the two-position three-way electromagnetic directional valve 11 is respectively connected with a port A (7A) of the plunger cylinder I7 and a port A (8A) of the plunger cylinder II 8.
When the three-position four-way electromagnetic directional valve 10 is in the left position, the port A and the port T are in a communicated state, and the port B and the port P are in a communicated state; when the valve is in the middle position, the port A, the port B and the port T are in a communicated state, and the port P is in a disconnected state; when the valve is in the right position, the port A and the port P are in a communicated state, and the port B and the port T are in a communicated state.
When the pressure of the C ports of the first hydraulic control one-way valve 5 and the second hydraulic control one-way valve 6 is higher than the valve opening pressure, the A port and the B port are in a two-way conduction state; when the pressure of the port C is lower than the valve opening pressure, the port A and the port B are in a one-way communication state (the port A is communicated with the port B).
When the two-position three-way electromagnetic directional valve 11 is in the left position, the port A is in a disconnected state, and the ports B and C are in a connected state; when the position is at the right position, the port C is in a disconnected state, and the ports A and B are in a connected state.
As shown in fig. 8, the hydraulic chuck 8 includes a hydraulic chuck base 163, a left hydraulic jaw 161 and a right hydraulic jaw 162 are respectively disposed on two sides of the hydraulic chuck base 163, a return spring 164 is disposed between the left hydraulic jaw 161 and the right hydraulic jaw 162, and two ends of the return spring 164 are respectively connected to the plunger cylinder 7 and the plunger cylinder 8.
The working principle of the second-level buffer hydraulic cylinder is as follows: the three-position four-way electromagnetic reversing valve 10 is positioned in a middle position, the first hydraulic control check valve 5 and the second hydraulic control check valve 6 are in a one-way conduction state, a rod cavity and a rodless cavity of the double-acting single-rod hydraulic cylinder 3 are in a disconnection state, the double-acting single-rod hydraulic cylinder 3 is in static self-locking, when a piston rod of the double-acting single-rod hydraulic cylinder 3 is impacted and ground, the piston rod of the double-acting single-rod hydraulic cylinder 3 contracts, emulsion in the rodless cavity of the double-acting single-rod hydraulic cylinder 3 flows out from an A port (3A), the emulsion flowing out from the 3A port flows into the first energy accumulator 1 through the A port (1A) of the first energy accumulator 1, when the pressure of the emulsion in the first energy accumulator 1 is higher than the preset pressure of the safety overflow valve 4, the emulsion in the rodless cavity of the double-acting single-rod hydraulic cylinder 3 and the emulsion in the first energy accumulator 1 flow into the safety overflow valve 4 through the A port (4A) of the safety overflow valve 4, the emulsion flows out from a port B (4B) of the safety overflow valve 4, and the emulsion flowing out from the port B directly flows into the external atmospheric environment, so that secondary buffering of the rock burst is realized.
The emergency braking process of the double-acting single-rod hydraulic cylinder 3 is as follows: when the displacement sensor 2 detects that the double-acting single-rod hydraulic cylinder 3 is in an abnormal working state, the motion acceleration of the piston rod of the double-acting single-rod hydraulic cylinder 3 is larger than a preset value, and the piston rod reaches an early warning position, the controller 9 controls the two-position three-way electromagnetic directional valve 11 to be in the right position, emulsion in the oil source 14 flows into the three-way valve 13 through the port A of the three-way valve 13, the emulsion flows out from the port B (13B) of the three-way electromagnetic directional valve after passing through the three-way valve, the emulsion flowing out from the port 13B flows into the three-way electromagnetic directional valve 11 through the port A (11A) of the two-position three-way electromagnetic directional valve 11 respectively, flows into the rodless cavity of the first plunger cylinder 7 through the port A (7A) of the first plunger cylinder 7 and flows into the rodless cavity of the second plunger cylinder 8 through the port A (8A) of the second plunger cylinder 8, the left hydraulic jack catch 161 is driven by the motion of the plunger cylinder I7, the right hydraulic jack catch 162 is driven by the motion of the plunger cylinder II 8, the left hydraulic jack catch 161 and the right hydraulic jack catch 162 rotate around the rotating shafts of the left hydraulic jack catch 161 and the right hydraulic jack catch 162 respectively, along with the rotation of the left hydraulic jack catch 161 and the right hydraulic jack catch 162, the piston rod of the double-acting single-rod hydraulic cylinder 3 is tightly embraced by the left hydraulic jack catch 161 and the right hydraulic jack catch 162, the piston rod of the double-acting single-rod hydraulic cylinder 3 rapidly stops moving under the action of friction force, when the oil source 14 fails accidentally, the energy accumulator II 12 can serve as a substitute oil source to provide high-pressure emulsion for emergency braking, and emergency braking of the abnormal working state of the double-acting single-rod hydraulic cylinder 3 is achieved.
And the secondary buffer device is a hydraulic cylinder buffer device based on the first energy accumulator and the safety overflow valve.
The primary buffer device is a primary mechanical buffer device near the piston rod, wherein the types of the primary mechanical buffer device include, but are not limited to, an S-type mechanical buffer device, a spring-type mechanical buffer device, a slotted ring-type mechanical buffer device, a grid-type mechanical buffer device, a cantilever beam-type mechanical buffer device, and a soft material mechanical buffer device.
The three-stage buffer device is a three-stage mechanical buffer device close to the bottom of the hydraulic cylinder, wherein the three-stage mechanical buffer device is of a type including but not limited to an S-type mechanical buffer device, a spring-type mechanical buffer device, a slotted ring type mechanical buffer device, a grid-type mechanical buffer device, a cantilever beam type mechanical buffer device and a soft material mechanical buffer device.
The mechanical buffer devices of the first-level buffer device and the third-level buffer device can be matched and combined according to different geological conditions.
The double-acting single-rod hydraulic cylinder 3 comprises a piston rod 302, a front end cover 303, a hydraulic cylinder 304, a rear end cover 305 and a cylinder base 301.
Fig. 2 shows that, for convenience of description, the first-order buffer device and the third-order buffer device of the present embodiment are both mechanical structures of S-type buffer scheme:
the primary buffer device comprises a primary S-shaped mechanical buffer element 18, the tertiary buffer device comprises a tertiary S-shaped mechanical buffer element 19, the piston rod lug 17 is connected with the primary S-shaped mechanical buffer element 18 through a bolt, the primary S-shaped mechanical buffer element 18 is connected with a piston rod of the double-acting single-rod hydraulic cylinder 3 through a bolt, a front end cover of the double-acting single-rod hydraulic cylinder 3 is fixedly connected with the hydraulic chuck 16, a rear end cover of the double-acting single-rod hydraulic cylinder is connected with the tertiary S-shaped mechanical buffer element 19 through a bolt, and the tertiary S-shaped mechanical buffer element 19 is connected with a cylinder barrel base of the double-acting single-rod hydraulic cylinder 3 through a bolt; the first-stage S-shaped mechanical buffer element 18 and the third-stage S-shaped mechanical buffer element 19 are cylindrical structures, two square grooves are formed in the two vertically symmetrical sides of the cylinder, and threaded columns are arranged on the upper and lower sides of the cylinder.
The working mode of the S-shaped mechanical buffer device is as follows: when the piston rod earrings 17 are impacted, the piston rod earrings 17 tightly press the primary S-shaped mechanical buffer elements 18, the primary S-shaped mechanical buffer elements 18 are bent and deformed, kinetic energy of the impact pressure is converted into elastic potential energy of the primary S-shaped mechanical buffer elements 18 through the bending deformation of the primary S-shaped mechanical buffer elements 18, the impact pressure is transmitted to the piston rod of the double-acting single-rod hydraulic cylinder 3 after being buffered by the primary S-shaped mechanical buffer elements 18, the impact pressure is transmitted to the tertiary S-shaped mechanical buffer elements 19 after being buffered by the secondary buffer hydraulic cylinder, the tertiary S-shaped mechanical buffer elements 19 are bent and deformed, the kinetic energy of the impact pressure is converted into the elastic potential energy of the tertiary S-shaped mechanical buffer elements 19 through the deformation of the tertiary S-shaped mechanical buffer elements 19, and the impact pressure buffered by the tertiary S-shaped mechanical buffer elements 19 is transmitted to the cylinder barrel bases of the double-acting single-rod hydraulic cylinders, according to the size of rock burst (different geological environments), a first-level S-shaped mechanical buffering element 18 and a third-level S-shaped mechanical buffering element 19 with different size parameters are selected, the structural rigidity of the first-level S-shaped mechanical buffering element 18 and the third-level S-shaped mechanical buffering element 19 is improved by increasing t1, the structural rigidity of the first-level S-shaped mechanical buffering element 18 and the third-level S-shaped mechanical buffering element 19 is reduced by reducing t1, and w1 is adjusted to change the buffering distance, so that rock burst with different degrees is buffered.
Fig. 3, for convenience of description, the primary buffer device and the third-order buffer device of the present embodiment are both spring-type mechanical buffer devices:
the primary buffer device comprises a primary buffer spring front end cover 20 and a primary buffer spring rear end cover 22 embedded with the primary buffer spring front end cover 20, a primary buffer spring 21 is arranged between the primary buffer spring front end cover 20 and the primary buffer spring rear end cover 22, and two ends of the primary buffer spring 21 are respectively fixed on guide posts at the centers of the primary buffer spring front end cover 20 and the primary buffer spring rear end cover 22; the third-stage buffer device comprises a front end cover 23 of the third-stage buffer spring and a rear end cover 25 of the third-stage buffer spring embedded with the front end cover 23 of the third-stage buffer spring, a third-stage buffer spring 24 is arranged between the front end cover and the rear end cover, and D in the figure 3 is an enlarged view of the third-stage buffer device.
The piston rod earrings 17 are connected with the front end 20 of the first-level buffer spring through bolts, the front end cover 20 of the first-level buffer spring is connected with the first-level buffer spring 21 through a guide post at the center of the front end cover 20 of the first-level buffer spring, the rear end cover 22 of the first-level buffer spring is connected with the piston rod of the double-acting single-rod hydraulic cylinder 3 through bolts, the rear end cover of the double-acting single-rod hydraulic cylinder 3 is connected with the front end cover 23 of the third-level buffer spring through bolts, the front end cover 23 of the third-level buffer spring is connected with the third-level buffer spring 24 through a guide post at the center of the front end cover 23 of the third-level buffer spring, the rear end cover 25 of the third-level buffer spring is connected with the cylinder base of the double-acting single-rod hydraulic cylinder 3 through bolts, and the front end cover of the double-acting single-rod hydraulic cylinder 3 is fixedly connected with the hydraulic chuck 16.
Spring type mechanical buffer device working mode: when the piston rod ear ring 17 is impacted, the piston rod ear ring 17 presses the first-stage buffer spring 21, the first-stage buffer spring 21 is compressed and deformed, when a guide post at the center of a front end cover 20 of the first-stage buffer spring is contacted with a guide post at the center of a rear end cover 22 of the first-stage buffer spring, the first-stage buffer spring 20 stops being compressed and deformed, the first-stage buffer spring 21 converts kinetic energy of the impact pressure into elastic potential energy of the first-stage buffer spring 21 through the compression and deformation, the impact pressure is transmitted to a piston rod of the double-acting single-rod hydraulic cylinder 3 after being buffered by the first-stage buffer spring 21, the impact pressure is transmitted to the third-stage buffer spring 24 after being buffered by the second-stage buffer hydraulic cylinder, the third-stage buffer spring 24 is compressed and deformed, when the guide post at the center of a front end cover 23 of the third-stage buffer spring is contacted with the guide post at the center of a rear end cover 25 of the third-stage buffer spring, the third-stage buffer spring 24 stops being compressed and deformed, the three-stage buffer spring 24 converts the kinetic energy of the rock burst into the elastic potential energy of the three-stage buffer spring 24 through compression deformation, the buffered rock burst is buffered for three times by the three-stage buffer spring 24 and then transmitted to the cylinder barrel base of the double-acting single-rod hydraulic cylinder 3, and springs with different rigidity are selected according to the size of the received rock burst to buffer rock bursts with different degrees.
Fig. 4, for convenience of description, the primary buffer device and the tertiary buffer device in this embodiment are both slotted ring type mechanical buffer devices:
the primary buffer device comprises a primary slotted annular buffer element front end cover 26 and a primary slotted annular buffer element rear end cover 28, and a primary slotted annular buffer element 27 is arranged between the primary slotted annular buffer element front end cover and the primary slotted annular buffer element rear end cover; the third-stage buffer device comprises a front end 29 of a third-stage slotted annular buffer element and a rear end cover 31 of the third-stage slotted annular buffer element, and a third-stage slotted annular buffer element 30 is arranged between the front end 29 and the rear end cover; the piston rod earring 17 is connected with a front end cover 26 of a first-stage slotted annular buffer element through a bolt, the front end cover 26 of the first-stage slotted annular buffer element is connected with a first-stage slotted annular buffer element 27 through a bolt, the first-stage slotted annular buffer element 27 is connected with a rear end cover 28 of the first-stage slotted annular buffer element through a bolt, the rear end cover 28 of the first-stage slotted annular buffer element is connected with a piston rod of the double-acting single-rod hydraulic cylinder 3 through a bolt, the rear end cover of the double-acting single-rod hydraulic cylinder 3 is connected with a front end cover 29 of a third-stage slotted annular buffer element through a bolt, the front end cover 29 of the third-stage slotted annular buffer element is connected with a third-stage slotted annular buffer element 30 through a bolt, the third-stage slotted annular buffer element 30 is connected with a rear end cover 31 of the third-stage slotted annular buffer element through a bolt, and the rear end cover 31 of the third-stage slotted annular buffer element is connected with a cylinder base of the double-acting single-rod hydraulic cylinder 3 through a bolt, the primary slotted annular buffer element 27 and the tertiary slotted annular buffer element 30 are mainly of circular ring structures, and four rectangular grooves with semicircular two ends are circumferentially arranged on the primary slotted annular buffer element and the tertiary slotted annular buffer element.
In fig. 4, a is a side view of the primary slotted ring buffer element front cover 26, and B is a front view of the primary slotted ring buffer element front cover 26.
The working mode of the slotted ring type mechanical buffer device is as follows: when the piston rod ear ring 17 is impacted, the piston rod ear ring 17 compresses the primary slotted annular buffer element 27, four grooves of the primary slotted annular buffer element 27 deform under the action of impact ground pressure, the kinetic energy of the impact ground pressure is converted into the elastic potential energy of the primary slotted annular buffer element 27 through the elastic deformation of the primary slotted annular buffer element 27, the impact ground pressure is buffered by the primary slotted annular buffer element 27 and then transmitted to the piston rod of the double-acting single-rod hydraulic cylinder 3, the impact ground pressure is buffered by the secondary buffer hydraulic cylinder and then transmitted to the tertiary slotted annular buffer element 30, four grooves of the tertiary slotted annular buffer element 30 deform under the action of the impact ground pressure, the kinetic energy of the impact ground pressure is converted into the elastic potential energy of the tertiary slotted annular buffer element 30 through the elastic deformation of the tertiary slotted annular buffer element 30, and the buffered impact ground pressure is buffered for three times by the tertiary slotted annular buffer element 30 and then transmitted to the double-acting single-rod hydraulic cylinder The cylinder barrel base of the hydraulic cylinder 3 adjusts the size parameters of the grooves of the first-level slotted annular buffer element 27 and the third-level slotted annular buffer element 30 according to different geological environments, the rigidity of the first-level slotted annular buffer element 27 and the third-level slotted annular buffer element 30 is reduced by increasing the size L1 and the radius r of the slots and reducing the thickness W2 of the slotted rings, the rigidity of the first-level slotted annular buffer element 27 and the third-level slotted annular buffer element 30 is improved by reducing the size L1 and the radius r of the slots and increasing the thickness W2 of the slotted rings, and the impact on different degrees of rock burst is buffered.
As shown in fig. 5, for convenience of description, the primary buffer device and the tertiary buffer device in this embodiment are both grid type mechanical buffer devices:
the primary buffer device comprises a primary grid buffer element front end cover 32 and a primary grid buffer element rear end cover 34, and a primary grid buffer element 33 is arranged between the primary grid buffer element front end cover and the primary grid buffer element rear end cover; the three-stage buffer device comprises a three-stage grid buffer element front end cover 35 and a three-stage grid buffer element rear end cover 37, and a three-stage grid buffer element 36 is arranged between the three-stage grid buffer element front end cover 35 and the three-stage grid buffer element rear end cover 37; the piston rod earrings 17 are connected with a first-stage grid buffer element front end cover 32 through bolts, the first-stage grid buffer element front end cover 32 is connected with a first-stage grid buffer element 33 through bolts, the first-stage grid buffer element 33 is connected with a first-stage grid buffer element rear end cover 34 through bolts, the first-stage grid buffer element rear end cover 34 is connected with a piston rod of the double-acting single-rod hydraulic cylinder 3 through bolts, the rear end cover of the double-acting single-rod hydraulic cylinder 3 is connected with a third-stage grid buffer element front end cover 35 through bolts, the third-stage grid buffer element front end cover 35 is connected with a third-stage grid buffer element 36 through bolts, the third-stage grid buffer element 36 is connected with a third-stage grid buffer element rear end cover 37 through bolts, and the third-stage grid buffer element rear end cover 37 is connected with a cylinder barrel base of the double-acting single-rod hydraulic cylinder 3 through bolts;
the main bodies of the first-level grid buffer element 33 and the third-level grid buffer element 36 are cylinders, diamond-shaped grooves are formed around the cylinders, and a plurality of threaded holes for connection are formed in the two ends of the cylinders. In fig. 5, C is an enlarged view of the primary grid buffer element 33.
The grid type mechanical buffer device has the working mode that: when the piston rod ear rings 17 are impacted, the piston rod ear rings 17 tightly press the primary grid buffer element 33, the diamond-shaped grooves of the primary grid buffer element 33 are elastically deformed under the action of impact pressure, the primary grid buffer element 33 absorbs the kinetic energy of the impact pressure through compression deformation, the impact pressure is transmitted to the piston rod of the double-acting single-rod hydraulic cylinder 3 after being buffered by the primary grid buffer element 33, the impact pressure is transmitted to the tertiary grid buffer element 36 after being buffered by the secondary grid buffer element of the buffer hydraulic cylinder, the diamond-shaped grooves of the tertiary grid buffer element 36 are compressively deformed under the action of the impact pressure, the tertiary grid buffer element 36 absorbs the kinetic energy of the impact pressure through compression deformation, the buffered impact pressure is transmitted to the cylinder base of the double-acting single-rod hydraulic cylinder 3 after being buffered for three times by the tertiary grid buffer element 36, and according to different geological conditions, different grid size parameters are selected, and the rigidity of the primary grid buffer element 33 and the rigidity of the tertiary grid buffer element 36 are adjusted to buffer different degrees of rock burst.
Fig. 6 shows that, for convenience of description, the primary buffer structure and the tertiary buffer structure of the present embodiment are both cantilever beam type mechanical buffer devices:
the first-level buffer structure comprises a first-level cantilever beam buffer element 38 and a second-level cantilever beam buffer element 39 connected with the first-level cantilever beam buffer element 38, the third-level buffer structure comprises a first-level cantilever beam buffer element 40 and a second-level cantilever beam buffer element 41 connected with the first-level cantilever beam buffer element 40, a piston rod ear ring 17 is connected with the first-level cantilever beam buffer element 38 through a bolt, the first-level cantilever beam buffer element 38 is connected with the second-level cantilever beam buffer element 39 through a bolt, the second-level cantilever beam buffer element 39 is connected with a piston rod of the double-acting single-rod hydraulic cylinder 3 through a bolt, a rear end cover of the double-acting single-rod hydraulic cylinder 3 is connected with the first-level cantilever beam buffer element 40 through a bolt, the first-level cantilever beam buffer element 40 is connected with the second-level cantilever beam buffer element 41 through a bolt, and the second-level cantilever beam buffer element 41 is connected with a cylinder barrel base of the double-acting single-rod hydraulic cylinder 3 through a bolt.
The first-stage cantilever beam buffering element I38 and the third-stage cantilever beam buffering element I40 are cylindrical as main bodies, threaded holes are formed in the peripheries of the first-stage cantilever beam buffering element I and the third-stage cantilever beam buffering element I, threaded columns are formed in the outer sides of the cylinders, and circular groove columns are formed in the inner sides of the cylinders; the centers of the second primary cantilever beam buffering element 39 and the second tertiary cantilever beam buffering element 41 are cylinders, threaded columns are arranged on the side faces of the cylinders, four square beams are arranged around the cylinders, square holes are formed in the centers of the four square beams, and threaded holes are formed in the four square beams.
In fig. 6, E is a front view of the first-level cantilever beam buffering element 38, F is a cross-sectional view of the first-level cantilever beam buffering element 38, and G is a perspective view of the first-level cantilever beam buffering element 38 and the second-level cantilever beam buffering element 39.
Cantilever beam type mechanical buffer device working mode: when the piston rod ear ring 17 is impacted, the first-stage cantilever beam buffering element 38 compresses the second-stage cantilever beam buffering element 39, four overhanging cantilever beams of the second-stage cantilever beam buffering element 39 are bent and deformed, kinetic energy of the impact pressure is converted into elastic potential energy of the second-stage cantilever beam buffering element 38 through the bending deformation of the second-stage cantilever beam buffering element 39, the impact pressure is buffered by the second-stage cantilever beam buffering element 39 and then transmitted to the piston rod of the double-acting single-rod hydraulic cylinder 3, the impact pressure is transmitted to the second-stage cantilever beam buffering element 41 through the secondary buffering action of the buffering hydraulic cylinder, four overhanging cantilever beams of the second-stage cantilever beam buffering element 41 are bent and deformed under the action of the impact pressure, and the kinetic energy of the impact pressure is converted into elastic potential energy of the second-stage cantilever beam buffering element 41 through the bending deformation of the second-stage cantilever beam buffering element 41, the impact pressure is transmitted to the cylinder base of the double-acting single-rod hydraulic cylinder 3 after being buffered by the second three-level cantilever beam buffering element 41, the rigidity of the second 39 and third 41 cantilever beam buffering elements is reduced by increasing the extension length and the slot sizes L2 and W3 of the extension cantilever beams of the second 39 and third 41 cantilever beam buffering elements according to different geological conditions, the rigidity of the second 39 and third 41 cantilever beam buffering elements is improved by reducing the extension length and the slot sizes L2 and W3 of the extension cantilever beams of the second 39 and third 41 cantilever beam buffering elements, and the buffering distance is adjusted by changing d to realize the buffering of the impact pressure of different degrees.
Fig. 7 shows, for convenience of description, the first-level buffer structure and the third-level buffer structure of the present embodiment are both soft material mechanical buffer devices:
the one-level buffer device comprises a one-level low Young's modulus material buffer element 42, the three-level buffer structure comprises a three-level low Young's modulus material buffer element 43, a piston rod lug 17 is connected with the one-level low Young's modulus material buffer element 42 through a bolt, the one-level low Young's modulus material buffer element 42 is connected with a piston rod of the double-acting single-rod hydraulic cylinder 3 through a bolt, a rear end cover of the double-acting single-rod hydraulic cylinder 3 is connected with the three-level low Young's modulus material buffer element 43 through a bolt, and the three-level low Young's modulus material buffer element 43 is connected with a cylinder barrel base of the double-acting single-rod hydraulic cylinder 3 through a bolt.
The primary low young modulus material buffer element 42 and the tertiary low young modulus material buffer element 43 are cylinders, threaded columns are arranged on two sides of the cylinders, the materials are low young modulus materials, and young modulus of the materials is about 20-40 Gpa.
In FIG. 7, H is a front view of the first order low Young's modulus material cushioning element 43.
The working mode of the soft material mechanical buffer device is as follows: when the piston rod ear 17 is impacted, the piston rod ear 17 presses the first-stage low Young's modulus material buffer element 42, the first-stage low Young's modulus material buffer element 42 is compressed and deformed under the action of the impact ground, the kinetic energy of the impact ground is converted into the deformation energy of the first-stage low Young's modulus material buffer element 42 through the compression deformation of the first-stage low Young's modulus material buffer element 42, the impact ground is transmitted to the piston rod of the double-acting single-rod hydraulic cylinder 3 after being buffered by the first-stage low Young's modulus material buffer element 42, the impact ground is transmitted to the third-stage low Young's modulus material buffer element 43 after being buffered by the second stage of the buffer hydraulic cylinder, the third-stage low Young's modulus material buffer element 43 is compressed and deformed under the action of the impact ground, the kinetic energy of the impact ground is converted into the deformation energy of the third-stage low Young's modulus material buffer element 43 through the compression deformation of the third-stage low Young's modulus material buffer element 43, the impact ground pressure is transmitted to the cylinder base of the double-acting single-rod hydraulic cylinder 3 after being buffered by the three-level low-Young's modulus material buffering element 43, the rigidity of the first-level low-Young's modulus material buffering element 42 and the rigidity of the third-level low-Young's modulus material buffering element 43 are improved by selecting a material with a larger Young's modulus according to different geological environments, the rigidity of the first-level low-Young's modulus material buffering element 42 and the rigidity of the third-level low-Young's modulus material buffering element 43 are reduced by selecting a material with a smaller Young's modulus, and the buffering distance is adjusted by changing t2, so that the impact ground pressure can be buffered to different degrees.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A mechanical-hydraulic combined buffer facing rock burst is characterized by comprising a single-rod hydraulic cylinder, wherein two ends of the single-rod hydraulic cylinder are respectively connected with a primary buffer device and a tertiary buffer device;
the single-rod hydraulic cylinder is connected with a displacement sensor, the displacement sensor is connected with a controller, the controller is connected with a second reversing valve, the second reversing valve is respectively connected with a plunger cylinder group, an energy accumulator II, a one-way valve III and an oil tank, and the one-way valve III is connected with an oil source.
2. The machine-liquid combined buffer facing rock burst of claim 1, wherein said primary buffer device and said tertiary buffer device are any one of S-type mechanical buffer device, spring type mechanical buffer device, slotted ring type mechanical buffer device, grid type mechanical buffer device, cantilever beam type mechanical buffer device and soft material mechanical buffer device.
3. The machine-liquid combined buffer facing rock burst of claim 2, wherein the S-shaped mechanical buffer device comprises an S-shaped mechanical buffer element, the S-shaped mechanical buffer element is of a cylindrical structure, two square grooves are formed in the two vertically symmetrical sides of the cylinder, and threaded columns are arranged at the upper end and the lower end of the cylinder.
4. The machine-liquid combined buffer facing rock burst of claim 2, wherein the spring type mechanical buffer device comprises a front buffer spring cover and a rear buffer spring cover engaged with the front buffer spring cover, a buffer spring is arranged between the front buffer spring cover and the rear buffer spring cover, and two ends of the buffer spring are respectively fixed on the guide posts at the centers of the front buffer spring cover and the rear buffer spring cover.
5. The buffer of claim 2, wherein the slotted ring type mechanical buffer device comprises a slotted ring type buffer element front end cover and a slotted ring type buffer element rear end cover, a slotted ring type buffer element is arranged between the slotted ring type buffer element front end cover and the slotted ring type buffer element rear end cover, the slotted ring type buffer element front end cover is connected with the slotted ring type buffer element through a bolt, the slotted ring type buffer element is connected with the slotted ring type buffer element rear end cover through a bolt, the slotted ring type buffer element is of a circular ring structure, and a plurality of rectangular grooves with semicircular two ends are circumferentially arranged on the slotted ring type buffer element.
6. The combined machine and liquid buffer facing rock burst of claim 2, wherein the grid type mechanical buffer device comprises a front end cover of the grid buffer element and a rear end cover of the grid buffer element, the grid buffer element is arranged between the front end cover of the grid buffer element and the rear end cover of the grid buffer element, the front end cover of the grid buffer element is connected with the grid buffer element through bolts, the grid buffer element is connected with the rear end cover of the grid buffer element through bolts, the grid buffer element is a cylinder, and the periphery of the grid buffer element is provided with diamond-shaped grooves.
7. The machine-liquid combined buffer facing rock burst as claimed in claim 2, wherein the cantilever beam type mechanical buffer device comprises a first cantilever beam buffer element and a second cantilever beam buffer element connected with the first cantilever beam buffer element, the first cantilever beam buffer element is cylindrical, threaded holes are formed in the periphery of the first cantilever beam buffer element, a threaded column is formed in the outer side of the cylinder, and a circular groove is formed in the other side of the cylinder; the second cantilever beam buffering element is cylindrical, a threaded column is arranged on the side face of the cylinder, a plurality of square beams are arranged on the periphery of the cylinder, a square hole is formed in the center of each square beam, and a threaded hole is formed in each square beam.
8. The mechanical-hydraulic combination buffer facing rock burst of claim 2, wherein the soft material mechanical buffer device comprises a low young's modulus material buffer element, the body of the low young's modulus material buffer element is a cylinder, threaded columns are arranged on two sides of the cylinder, and the material is selected from a low young's modulus material, and the young's modulus of the material is about 10 to 130 Gpa.
9. The machine-liquid combined buffer facing rock burst of claim 1, wherein the first reversing valve is in a neutral position, the first one-way valve and the second one-way valve are in a one-way conduction state, both the rod cavity and the rodless cavity of the single-rod hydraulic cylinder are in a disconnection state, the single-rod hydraulic cylinder is in static self-locking, when a piston rod of the single-rod hydraulic cylinder is subjected to rock burst, the piston rod of the single-rod hydraulic cylinder contracts, emulsion in the rodless cavity of the single-rod hydraulic cylinder flows into the first energy accumulator, and when the pressure of the emulsion in the first energy accumulator is higher than a preset pressure of a safety overflow valve, the emulsion in the rodless cavity of the single-rod hydraulic cylinder and the emulsion in the first energy accumulator are together discharged into the atmosphere directly through safety, so that secondary buffering of the rock burst is realized.
10. The combined mechanical and hydraulic buffer for rock burst as claimed in claim 1, wherein the emergency braking process of the single-rod hydraulic cylinder is as follows:
when the displacement sensor detects that the single-rod hydraulic cylinder is in an abnormal working state, the motion acceleration of the piston rod of the single-rod hydraulic cylinder is larger than a preset value and the piston rod reaches an early warning position, the controller controls the reversing valve II to be in the right position, emulsion in the oil source respectively enters the reversing valve II and the energy accumulator II after passing through the check valve III, the emulsion flows into a rodless cavity of the plunger cylinder group after passing through the reversing valve II, the left hydraulic clamping jaw and the right hydraulic clamping jaw of the hydraulic chuck are respectively driven by the movement of the plunger cylinder group to rotate around the rotating shafts of the left hydraulic clamping jaw and the right hydraulic clamping jaw, the left hydraulic clamping jaw and the right hydraulic clamping jaw tightly hold a piston rod of the single-rod hydraulic cylinder, and the piston rod of the single-rod hydraulic cylinder rapidly stops moving under the action of friction force, when the oil source fails unexpectedly, the second energy accumulator can be used as a substitute oil source to provide high-pressure emulsion for emergency braking, so that emergency braking of the single-rod hydraulic cylinder in an abnormal working state is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111170856.XA CN113983110B (en) | 2021-10-08 | 2021-10-08 | Machine-liquid combined buffer for rock burst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111170856.XA CN113983110B (en) | 2021-10-08 | 2021-10-08 | Machine-liquid combined buffer for rock burst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113983110A true CN113983110A (en) | 2022-01-28 |
| CN113983110B CN113983110B (en) | 2022-06-17 |
Family
ID=79737756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111170856.XA Active CN113983110B (en) | 2021-10-08 | 2021-10-08 | Machine-liquid combined buffer for rock burst |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113983110B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1625810A1 (en) * | 2004-08-10 | 2006-02-15 | Schock Metallwerk GmbH | Movement damping device |
| DE102007060951A1 (en) * | 2007-12-18 | 2009-06-25 | Robert Bosch Gmbh | Pressure accumulator, in particular for a hydraulic unit of a hydraulic vehicle brake system with electronic wheel slip control |
| CN104179881A (en) * | 2014-07-18 | 2014-12-03 | 武汉船用机械有限责任公司 | Buffering system for self-elevating platform |
| CN105387120A (en) * | 2015-11-26 | 2016-03-09 | 中国民航大学 | Single-actuating type magneto-rheological shock absorber used for aircraft landing gear |
| CN106246616A (en) * | 2016-10-11 | 2016-12-21 | 上海振华重工(集团)股份有限公司 | The vehicle wheel frame suspension hydraulic system of straddle carrier and control method thereof |
| CN107588150A (en) * | 2017-10-19 | 2018-01-16 | 燕山大学 | Especially big load hydraulic bjuffer |
| CN107939894A (en) * | 2017-12-29 | 2018-04-20 | 山东大学 | A kind of ambulance stretcher vibrating isolation system and its method of work |
| CN111503190A (en) * | 2020-05-29 | 2020-08-07 | 焦作中海重工机械有限公司 | Electrohydraulic brake cylinder and matched brake device thereof |
| CN112709779A (en) * | 2020-12-28 | 2021-04-27 | 太原重工股份有限公司 | Hydraulic safety buffer device for continuous pipe rolling unit |
-
2021
- 2021-10-08 CN CN202111170856.XA patent/CN113983110B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1625810A1 (en) * | 2004-08-10 | 2006-02-15 | Schock Metallwerk GmbH | Movement damping device |
| DE102007060951A1 (en) * | 2007-12-18 | 2009-06-25 | Robert Bosch Gmbh | Pressure accumulator, in particular for a hydraulic unit of a hydraulic vehicle brake system with electronic wheel slip control |
| CN104179881A (en) * | 2014-07-18 | 2014-12-03 | 武汉船用机械有限责任公司 | Buffering system for self-elevating platform |
| CN105387120A (en) * | 2015-11-26 | 2016-03-09 | 中国民航大学 | Single-actuating type magneto-rheological shock absorber used for aircraft landing gear |
| CN106246616A (en) * | 2016-10-11 | 2016-12-21 | 上海振华重工(集团)股份有限公司 | The vehicle wheel frame suspension hydraulic system of straddle carrier and control method thereof |
| CN107588150A (en) * | 2017-10-19 | 2018-01-16 | 燕山大学 | Especially big load hydraulic bjuffer |
| CN107939894A (en) * | 2017-12-29 | 2018-04-20 | 山东大学 | A kind of ambulance stretcher vibrating isolation system and its method of work |
| CN111503190A (en) * | 2020-05-29 | 2020-08-07 | 焦作中海重工机械有限公司 | Electrohydraulic brake cylinder and matched brake device thereof |
| CN112709779A (en) * | 2020-12-28 | 2021-04-27 | 太原重工股份有限公司 | Hydraulic safety buffer device for continuous pipe rolling unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113983110B (en) | 2022-06-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106090402B (en) | A kind of driving device and valve actuator based on gas-liquid cluster spring | |
| CN110761431B (en) | Combined shock-absorbing damper with self-resetting function | |
| CN106122567B (en) | A kind of valve actuator based on gas-liquid cluster spring | |
| CN108757808B (en) | Variable friction viscous fluid mixing damper | |
| CN102859080A (en) | Double check valve for construction equipment | |
| CN113983110B (en) | Machine-liquid combined buffer for rock burst | |
| CN102518618A (en) | Hydraulic cylinder | |
| CN110173533B (en) | Prestress damping spring | |
| CN100460164C (en) | Safety type rigidity variable mechanical joint | |
| CN102285599A (en) | Crane and double-counterweight-cylinder hydraulic control system thereof | |
| CN202545419U (en) | Mechanical self-locking hydraulic cylinder | |
| CN208041280U (en) | Pneumatic actuator hydraulic type Buffer Unit | |
| CN109630482B (en) | Spring piston type pressure accumulator with one-way valve | |
| CN113882239B (en) | Self-reset multistage variable-rigidity viscous damper | |
| CN113882882A (en) | Novel scour protection stand | |
| CN214007877U (en) | Magneto-rheological buffer with series-parallel structure | |
| CN102518619A (en) | Elastic buffering hydraulic cylinder | |
| CN212336376U (en) | Self-recovery energy dissipation and shock absorption device for building engineering | |
| CN114645583A (en) | Self-resetting damper capable of amplifying displacement by using gear | |
| CN104895993B (en) | A kind of Multicarity recoil damping device | |
| CN204664271U (en) | A kind of Multicarity recoil damping device | |
| CN113483047A (en) | Stepped energy consumption viscous damper | |
| CN202100640U (en) | X-shaped steel wire isolator | |
| CN216240711U (en) | Novel scour protection stand | |
| CN211039225U (en) | Oil pressure device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |