CN115356141B - Impact performance testing system and method for hydraulic rock drill - Google Patents
Impact performance testing system and method for hydraulic rock drill Download PDFInfo
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- CN115356141B CN115356141B CN202211290563.XA CN202211290563A CN115356141B CN 115356141 B CN115356141 B CN 115356141B CN 202211290563 A CN202211290563 A CN 202211290563A CN 115356141 B CN115356141 B CN 115356141B
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- 239000011435 rock Substances 0.000 title claims abstract description 117
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 57
- 238000005553 drilling Methods 0.000 claims abstract description 12
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- 230000013011 mating Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 description 99
- 239000010720 hydraulic oil Substances 0.000 description 9
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- G—PHYSICS
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Abstract
The invention discloses an impact performance testing system and method of a hydraulic rock drill, and relates to the technical field of rock drilling. The test system comprises: the mechanism part comprises a punched oil cylinder, a piston rod of the punched oil cylinder is connected with a drill bit of the hydraulic rock drill through a connecting sleeve, the punched oil cylinder is communicated with a loading oil cylinder through a one-way valve, and a hydraulic pump station provides power for the work of the rock drill and the reset of the punched oil cylinder and the loading oil cylinder. The loading overflow valve and the energy accumulator are installed on the rod cavity passage of the loading oil cylinder, and different overflow pressure values of the loading overflow valve are set to test rocks with different hardness. The test acquisition part comprises a pressure sensor, a flow sensor, a displacement sensor, a temperature sensor and an acquisition system. Impact energy, impact frequency and impact power are obtained through calculation according to data acquired by the sensor, so that impact parameters are indirectly obtained, and the method is high in repeatability, simple to operate, low in economic cost and wide in applicability; setting different overflow pressure values, and testing and analyzing rock breaking efficiency of rocks with different hardness.
Description
Technical Field
The invention relates to the technical field of rock drilling, in particular to a system and a method for testing impact performance of a hydraulic rock drill.
Background
Hydraulic rock drill is mainly used for construction of facilities such as mining area exploitation, geological exploration, tunnel construction and the like. In the practical engineering application process, the hydraulic rock drill has the characteristics of high rock breaking efficiency, less environmental pollution, high operation safety, convenient control and the like compared with other rock breaking machines.
The existing hydraulic rock drill impact performance testing method mostly adopts a mode of directly striking the rock, and the impact performance of the rock drill is roughly evaluated by recording the time length of striking holes with a certain length, so that the performance parameters of the rock drill cannot be accurately obtained.
The Chinese patent with the publication number of CN107543734A discloses a rock drill impact performance testing scheme with drop hammer calibration, which is used for absorbing the impact energy of the rock drill by taking a heavy object as a load, calibrating parameters by a drop hammer method and capturing energy by using a stress wave mode so as to realize the test of impact performance parameters. However, the method needs to be provided with large weights, the test bench is huge in size, meanwhile, the adaptability of the tested objects aiming at different power levels is poor, the weights with different specifications need to be replaced, and the data acquisition is greatly influenced by experimenters and is troublesome to operate.
Disclosure of Invention
The invention provides a system and a method for testing the impact performance of a hydraulic rock drill, wherein the existing system and method have the following problems: the performance parameters of the hydraulic rock drill cannot be accurately and conveniently obtained, the operation is complex, the test result cannot objectively reflect the actual impact performance parameters of the hydraulic rock drill, the test of equipment with different power levels cannot be met, and the rock breaking efficiency under different lithologies cannot be effectively simulated.
In order to solve the technical problems, the embodiment of the invention provides the following scheme:
in one aspect, an embodiment of the present invention provides an impact performance test system for a hydraulic rock drill, the test system including a mechanism portion and a test acquisition portion;
the mechanism part comprises a punched oil cylinder, a piston rod of the punched oil cylinder is connected with a drill bit of the hydraulic rock drill through a connecting sleeve
The mechanism part comprises a punched oil cylinder, a piston rod of the punched oil cylinder is connected with a drill bit of the hydraulic rock drill through a connecting sleeve, the axis of the piston rod of the punched oil cylinder is coaxial with the axis of the drill bit of the hydraulic rock drill, the punched oil cylinder is communicated with a loading oil cylinder through a one-way valve, and a hydraulic pump station provides power for the hydraulic rock drill to work and provides power for the punched oil cylinder and the loading oil cylinder to reset; a loading overflow valve and an energy accumulator are arranged on a rod cavity passage of the loading oil cylinder, different overflow pressure values of the loading overflow valve are set to test rocks with different hardness, and the energy accumulator provides stable back pressure for the loading oil cylinder;
the test acquisition part comprises a sensor and an acquisition system, data acquired by the sensor are transmitted to the acquisition system, and the acquisition system calculates and obtains impact performance parameters, wherein the impact performance parameters comprise impact energy, impact frequency and impact power;
the loading oil cylinder is provided with a displacement sensor for measuring the displacement of a piston rod of the loading oil cylinder, wherein the displacement data collected by the displacement sensor are used for simulating rock drilling amount, and the displacement data collected by the displacement sensor are used for simulating rock drilling amount; the rodless cavity of the impacted cylinder, the rodless cavity and the rod-containing cavity of the loading cylinder are connected with pressure sensors in parallel, the rodless cavity of the impacted cylinder is provided with a temperature sensor, and the rod-containing cavity of the loading cylinder is connected with a flow sensor in series.
Preferably, the punched oil cylinder is connected with a drill bit of the hydraulic rock drill through the connecting sleeve.
Preferably, the connecting sleeve is replaced by a connecting sleeve with different specifications so as to adapt to drill heads with different specifications.
Preferably, the pressure sensor, the temperature sensor, the flow sensor and the displacement sensor are respectively connected with the acquisition system, and the acquisition system is connected with a computer.
Preferably, the test system further comprises a loading test bed and an impact bed, wherein the impacted cylinder, the thrust beam and the hydraulic rock drill are arranged on the impact bed, and the loading cylinder, the matched hydraulic valve group and the energy accumulator are arranged on the loading test bed.
Preferably, a displacement sensor is arranged at the front end of the loading oil cylinder and is used for
And acquiring displacement data of the loading oil cylinder in real time.
Preferably, the rodless cavity of the impacted cylinder and the rodless cavity of the loading cylinder are respectively provided with a one-way valve; the rodless cavity of the impacted cylinder and the rodless cavity of the loading cylinder are provided with one-way valves and are connected through hard pipes by adopting hard pipe connection.
Preferably, the test system further comprises an electric control cabinet, the pressure sensor is connected with a secondary pressure display instrument of the electric control cabinet, and the secondary pressure display instrument displays an instant pressure value;
the flow sensor is connected with a flow secondary display instrument of the electric control cabinet, and the flow secondary display instrument displays an instantaneous flow value;
the temperature sensor is connected with the second-time instrument temperature display instrument of the electric control cabinet to display an instant temperature value.
In another aspect, an embodiment of the present invention provides a method for testing impact performance of a hydraulic rock drill, including:
building the impact performance test system of the hydraulic rock drill:
opening system software, setting a test channel, setting sampling frequency, measuring range and output mode, and preparing to start a test;
the loading oil cylinder and the impacted oil cylinder are adjusted to specified positions, the pushing oil cylinder applies pushing force to the hydraulic rock drill, and after the pushing force is applied, the drill bit of the rock drill, the connecting sleeve and the impacted oil cylinder piston rod are tightly attached; the hydraulic rock drill is propelled at this time, and the test system should be in a static state;
the hydraulic rock drill starts to impact, the loading oil cylinder and the impacted oil cylinder start to move under the impact force of the hydraulic rock drill, the pressure sensor, the temperature sensor, the flow sensor and the displacement sensor acquire data and transmit the data to a computer through the acquisition system, and the computer calculates impact performance through the data to obtain the impact energy, the impact frequency and the impact power of the hydraulic rock drill;
setting different overflow pressures of the loading overflow valves, repeating the steps, and testing the impact performance of the hydraulic rock drill and the drilling amount under the rocks with different hardness when the rock with different hardness is simulated.
Preferably, the method comprises the steps of,
the formula for obtaining impact energy is:
wherein,,
the displacement speed of the loading oil cylinder is mm/s; f is the impact frequency, hz;
the method for obtaining the impact frequency comprises the following steps:
because the pressure and displacement change frequency of the impacted test system has the same frequency as the tested object, the impact frequency value of the equipment can be calculated by carrying out FFT conversion on the displacement curve of the piston rod of the loading cylinder, the loading cylinder or the pressure curve of the impacted cylinder:
wherein,,
the formula for obtaining the impact power is:
wherein P is impact power, KW.
The scheme of the invention at least comprises the following beneficial effects:
1. the system and the method realize the basic requirements of impact energy absorption and impact performance detection of the hydraulic rock drill. The impacted cylinder and the loading cylinder and the matched parts thereof are used for absorbing the impact energy of the rock drill and ensuring the test operation of equipment; the pressure sensor configured by the system and the method is a high-precision pressure detection element, the displacement sensor is a high-precision displacement detection element, the impact parameter is indirectly obtained, the difficult problem of harsh conditions of a direct test method is effectively solved, the repeatability is high, the operation is simple, the economic cost is low, and the test result is accurate.
2. And setting different overflow pressure values of the loading overflow valve to realize the rock working conditions of different hardness in a simulation test, and analyzing the rock breaking efficiency under different lithologies.
3. The load size is adjusted by adjusting the pressure of the loading overflow valve, so that the test requirements of hydraulic rock drills with different power levels are met.
4. The energy accumulator provides stable back pressure for the loading oil cylinder, so that the one-way valve cannot be opened before the hydraulic rock drill is not started to impact, hydraulic oil in the impacted oil cylinder cannot enter a rodless cavity of the loading oil cylinder to generate advanced loading displacement, and meanwhile, when the overflow valve is in a slow reaction state, the pressure of the system is maintained to be stable, and the stability of a test curve is ensured.
5. The test process does not need direct contact type measurement (such as strain gauge) equipment installation, the test structure is little affected by personnel, the accuracy is high, and the repeatability is strong.
Drawings
FIG. 1 is a block diagram of a test system of the present invention;
fig. 2 is a graph of pressure signals of 1 and 2 ports of the check valve, wherein a is the rodless cavity pressure of the impacted cylinder, and B is the rodless cavity pressure of the loading cylinder;
FIG. 3 is a displacement diagram of a loading cylinder piston;
FIG. 4 is a flow chart diagram of a method of testing the impact performance of a hydraulic rock drill according to the present invention;
fig. 5 is a flow chart II of the impact performance test method of the hydraulic rock drill of the present invention.
Reference numerals:
1. a hydraulic rock drill; 2. a punched oil cylinder; 3. loading an oil cylinder; 4. a hydraulic valve block; 5. loading an overflow valve; 6. a pump station; 7. connecting sleeves; 8. a thrust cylinder; 9. a rod cavity pressure sensor of the loading oil cylinder; 10. a temperature sensor; 11. a rodless cavity pressure sensor of the impacted cylinder; 12. a rodless cavity pressure sensor of the loading oil cylinder; 13. a flow sensor; 14. an acquisition system; 15. a computer; 16. a displacement sensor; 17. an impact bench; 18. loading a test bed; 19. an accumulator; 20. a one-way valve.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides an impact performance test system of a hydraulic rock drill, the test system including a mechanism part and a test acquisition part.
The mechanism part comprises a punched oil cylinder 2, a piston rod of the punched oil cylinder 2 is connected with a drill bit of the hydraulic rock drill 1 through a connecting sleeve 7, the axis of the piston rod of the punched oil cylinder 2 is coaxial with the axis of the drill bit of the hydraulic rock drill 1, the punched oil cylinder 2 is communicated with a loading oil cylinder 3 through a one-way valve 20, and a hydraulic pump station 6 provides power for the hydraulic rock drill 1 to work and the punched oil cylinder 2 and the loading oil cylinder 3 to reset; a loading overflow valve 5 and an accumulator 19 are arranged on a rod cavity passage of the loading oil cylinder 3, different overflow pressure values of the loading overflow valve 5 are set to test rocks with different hardness, and the accumulator 19 provides stable back pressure for the loading oil cylinder 3;
the test acquisition part comprises a sensor and an acquisition system 14, data acquired by the sensor are transmitted to the acquisition system 14, and impact performance parameters are acquired through acquisition and calculation, wherein the impact performance parameters comprise impact energy, impact frequency and impact power; a displacement sensor 16 is arranged on the loading oil cylinder 3 and is used for measuring the displacement of a piston rod of the loading oil cylinder 3, wherein the displacement data acquired by the displacement sensor 16 simulate the rock drilling amount; the rodless cavity of the impact cylinder 2, the rodless cavity and the rod-containing cavity of the loading cylinder 3 are connected with pressure sensors in parallel, the temperature sensor 10 is arranged on the rodless cavity of the impact cylinder 2, and the flow sensor 13 is connected in series in the rod-containing cavity of the loading cylinder 3. The pressure sensor comprises a rod cavity pressure sensor 9 of the loading oil cylinder, a rodless cavity pressure sensor 11 of the impacted oil cylinder and a rodless cavity pressure sensor 12 of the loading oil cylinder.
Specifically, the industrial personal computer calculates impact energy and impact power according to the data, wherein the impact performance parameters comprise the impact energy and the impact power. The test acquisition part of the embodiment comprises a pressure sensor, a flow sensor 13, a displacement sensor 16, a temperature sensor 10 and an acquisition system 14. A displacement sensor 16, a pressure sensor, a temperature sensor 10 and a flow sensor 13 are arranged on the system, and impact performance parameters (including impact energy, impact frequency and impact power) are calculated according to data acquired by the sensors. A displacement sensor 16 is mounted on the loading bench for measuring the displacement of the piston rod of the loading cylinder 3, wherein the displacement data acquired by the displacement sensor 16 simulates the rock drilling amount. The pressure sensor of the embodiment is a high-precision pressure detection element, the displacement sensor 16 is a high-precision displacement detection element, the impact parameters are indirectly obtained, the difficult problem of harsh conditions of a direct test method is effectively solved, the repeatability is high, the operation is simple, the economic cost is low, and the applicability is wide.
Different overflow pressure values of the loading overflow valve 5 are set by the system to test rocks with different hardness, so that lithology simulation is realized, and rock breaking efficiency under different lithology is analyzed; the load size is adjusted by adjusting the pressure of the loading overflow valve 5, so that the test requirements of the hydraulic rock drill 1 with different power levels are met; the system of the embodiment utilizes the pressure sensor, the temperature sensor 10, the flow sensor 13 and the displacement sensor 16 to collect pressure data, temperature data, flow data and displacement data, so as to obtain the impact performance parameters of the rock drill; the accumulator 19 provides stable back pressure for the loading cylinder 3, so that the one-way valve 20 cannot be opened before the hydraulic rock drill 1 is not started to impact, hydraulic oil in the impacted cylinder 2 cannot enter a rodless cavity of the loading cylinder 3, advanced loading displacement is generated, meanwhile, when the overflow valve is in a slow reaction state, the pressure of the system is maintained to be stable, and the stability of a test curve is ensured. Specifically, the loading cylinder 3 is fixed with the cylinder body of the part of the impacted cylinder 2, and the pushing cylinder 8 applies constant pushing force to the rock drill.
Preferably, the punched cylinder 2 is connected with the drill bit of the hydraulic rock drill 1 through a connecting sleeve 7. The connecting sleeve 7 can be replaced by connecting sleeves 7 with different specifications so as to adapt to drill bits with different specifications.
Preferably, the pressure sensor, the temperature sensor 10, the flow sensor 13 and the displacement sensor 16 are connected with the acquisition system 14, and the acquisition system 14 is connected with the computer 15. The computer 15 is connected to a printer for printing the report.
Preferably, the system further comprises a loading experiment bench 18 and an impact bench 17, wherein the impact cylinder 2, the pushing cylinder 8, the pushing beam and the hydraulic rock drill 1 are arranged on the impact bench 17, specifically, the hydraulic rock drill 1 is arranged on the pushing beam, and the pushing cylinder 8 pushes the hydraulic rock drill 1 to move; the loading oil cylinder 3, the matched hydraulic valve group 4 and the energy accumulator 19 are arranged on the loading test bed 18. Specifically, the loading cylinders 3 are arranged vertically or horizontally as needed.
Preferably, a displacement sensor 16 is installed at the front end of the loading cylinder 3, for acquiring displacement data of the loading cylinder 3 in real time.
Preferably, the rodless cavity of the impacted cylinder 2 and the rodless cavity of the loading cylinder 3 are provided with the one-way valve 20, and are connected by a hard pipe, and the expansion energy loss of the oil pipe is effectively reduced by the hard pipe.
Preferably, the system also comprises an electric control cabinet, wherein the pressure sensor is connected with a pressure secondary display instrument of the electric control cabinet, and the pressure secondary display instrument displays an instantaneous pressure value; the flow sensor 13 is connected with a flow secondary display instrument of the electric control cabinet, and the flow secondary display instrument displays an instantaneous flow value; the temperature sensor 10 is connected with a temperature secondary display instrument of the electric control cabinet, and the temperature secondary display instrument displays an instant temperature value.
The punched oil cylinder 2 and the loading oil cylinder 3 are preferably in the form of parameter specifications with the same specification;
the parameters of the primary hydraulic cylinders (the punched oil cylinder 2 and the loading oil cylinder 3) are selected:
when the piston is acted on
And cylinder chamber pressure
When known, the corresponding cylinder inner diameter D is obtained by using the formula 1-1:
wherein,,
for the force of the piston to act on,
is the pressure of the chamber of the oil cylinder,
is the flow loss coefficient.
Design calculation of piston rods (the impacted cylinder 2 and the loading cylinder 3): the cylinder diameter d is determined from the cylinder inner diameter using equation 1-2:
as shown in fig. 4 to 5, the embodiment of the invention provides a method for testing the impact performance of a hydraulic rock drill, which comprises the following steps:
s100, opening test software, setting a test channel (sensor parameters: sampling frequency, measuring range, output mode and the like), and preparing for starting a test;
s200, hydraulic system adjustment:
s210, adjusting the loading oil cylinder 3 and the impacted oil cylinder 2 to initial positions, wherein the impacted oil cylinder 2 is in a nearly fully extended state, and the loading oil cylinder 3 is in a nearly fully retracted state.
S220, setting a loading overflow valve 5 and an accumulator 19, and setting corresponding overflow valve pressure and accumulator 19 pressure according to the impact parameters of the rock drill to be tested;
s230, adjusting the propulsion cylinder 8: the pushing cylinder 8 applies pushing force to the hydraulic rock drill 1, and the drill bit of the rock drill, the connecting sleeve 7 and the piston rod of the punched cylinder 2 are required to be tightly attached after the pushing force is applied. Applying a propulsive force to the hydraulic rock drill 1, the system being in a stationary state; in the process, under the action of the initial pressure of the overflow valve, the pressure of the rod cavity of the loading oil cylinder 3 is smaller than the set pressure, so that the pressure of hydraulic oil in the rodless cavity of the loading oil cylinder 3 is larger than that of hydraulic oil in the rodless cavity of the impact receiving oil cylinder 2, and the one-way valve 20 is not opened in advance when impact is not started, and the hydraulic oil in the impact receiving oil cylinder 2 is not fed into the loading oil cylinder 3 in advance;
s300, starting the hydraulic rock drill 1 to impact, enabling the loading oil cylinder 3 and the impact oil cylinder 2 to move under the impact force of the rock drill, collecting data by a sensor, transmitting the data to a computer 15 through a collecting system 14, and calculating the impact performance by the computer 15 through the data; in the process, the impact force is applied to the impact cylinder 2, hydraulic oil in a rodless cavity of the impact cylinder 2 is compressed, so that the hydraulic oil enters the rodless cavity of the loading cylinder 3 through the one-way valve 20, the pressure of the rodless cavity of the loading cylinder 3 exceeds the set pressure of the overflow valve, the overflow valve is opened, a piston rod of the open-circuit loading cylinder 3 generates loading displacement, and the displacement under the pressure simulates the drilling amount of rock;
s400, setting different overflow pressures of the loading overflow valve 5, repeating the step S300, and simulating the impact performance of the hydraulic rock drill 1 and the drilling amount under the rocks with different hardness when the rocks with different hardness are impacted;
in step S220, the charge relief valve 5 pressure and accumulator 19 pressure settings need to be made:
selecting the set pressure of the overflow valve:
in order to ensure that the displacement of the test system is superimposed and that the variable causing the displacement is only caused by the impact, it is necessary to ensure that the test system keeps the check valve 20 closed and still when only the thrust is received, and that the opening of the check valve 20 occurs only when the impact is received and that the loading cylinder 3 moves. The actual curves are as follows in fig. 2, satisfying equations 1-3:
wherein,,
s is the height of the cavity space of the rod cavity of the loading oil cylinder 3, and mm;
wherein,,
is the mass of the piston of the rock drill; kg of the weight of the mixture,
j is the estimated impact energy;
about 0.2-0.5ms for the rock drill impact dwell time;
the pressure of the overflow valve is properly adjusted according to the impact energy of the measured object, and when the impact energy of the measured object is larger, the set pressure of the overflow valve is increased
The rock working condition with higher hardness is simulated, so that the allowable time of the test can be effectively increased; conversely, when the impact energy of the measured object is smaller, the overflow is reducedSet pressure of flow valve
The rock working condition with smaller hardness is simulated, so that the test object can effectively push the loading oil cylinder 3, and the test is ensured to be carried out.
The accumulator 19 is configured, the inflation pressure of the accumulator 19 is slightly larger than the set pressure of the overflow valve and is about 1.1-1.4 times of the set pressure of the overflow valve, and the accumulator 19 can effectively stabilize the pressure signal in the test process.
In step S300, the displacement curve is shown in FIG. 3, and the impact energy is obtained by using the formulas 1-4:
S is the height of the cavity space of the rod cavity of the loading oil cylinder 3, and mm;
wherein k is the displacement speed of the loading cylinder 3, and is mm/s; f is the impact frequency, hz.
The method for obtaining the impact frequency comprises the following steps:
in step S300, the displacement curve is shown in fig. 3, and the method for obtaining the impact frequency by using formulas 1-6 is as follows:
because the pressure and displacement change frequency of the impacted test system has the same frequency as the tested object, the impact frequency value of the equipment can be calculated by carrying out FFT conversion on the displacement curve of the piston rod of the loading oil cylinder 3, the pressure curve of the loading oil cylinder 3 or the impacted oil cylinder 2:
wherein,,
in step S300, the impact frequency is obtained by using the formulas 1-7:
wherein P is impact power, kW.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (9)
1. The impact performance test system of the hydraulic rock drill is characterized by comprising a mechanism part and a test acquisition part;
the mechanism part comprises a punched oil cylinder, a piston rod of the punched oil cylinder is connected with a drill bit of the hydraulic rock drill through a connecting sleeve, the axis of the piston rod of the punched oil cylinder is coaxial with the axis of the drill bit of the hydraulic rock drill, the punched oil cylinder is communicated with a loading oil cylinder through a one-way valve, and a hydraulic pump station provides power for the hydraulic rock drill to work and the punched oil cylinder and the loading oil cylinder to reset; a loading overflow valve and an energy accumulator are arranged on a rod cavity passage of the loading oil cylinder, different overflow pressure values of the loading overflow valve are set to test rocks with different hardness, and the energy accumulator provides stable back pressure for the loading oil cylinder;
the test acquisition part comprises a sensor and an acquisition system, data acquired by the sensor are transmitted to the acquisition system, and impact performance parameters are acquired through acquisition and calculation, wherein the impact performance parameters comprise impact energy, impact frequency and impact power;
the loading oil cylinder is provided with a displacement sensor for measuring the displacement of a piston rod of the loading oil cylinder, wherein displacement data acquired by the displacement sensor simulate the rock drilling amount; the rodless cavity of the impacted cylinder, the rodless cavity and the rod-containing cavity of the loading cylinder are connected with pressure sensors in parallel, the rodless cavity of the impacted cylinder is provided with a temperature sensor, and the rod-containing cavity of the loading cylinder is connected with a flow sensor in series; by setting the overflow pressure of different loading overflow valves, the impact performance of the hydraulic rock drill and the drilling amount under the rock with different hardness when the rock with different hardness is impacted are simulated;
the sensor collects data and transmits the data to the computer through the collection system, and the computer calculates the impact performance through the data to obtain the impact energy, the impact frequency and the impact power of the hydraulic rock drill;
the method for obtaining the impact energy comprises the following steps:
E in is impact energy, J;
η k is the flow loss coefficient;
P ip the pressure is MPa which is the peak pressure generated by the nth impact of the rodless cavity of the impacted cylinder;
P cv opening pressure of the one-way valve is MPa;
P lf setting pressure for a rod cavity of the loading oil cylinder, wherein the pressure is MPa;
P b for propulsion pressure, MPa;
A lf for loading the oil cylinder and the punched oil cylinder, the area of the rod cavity is mm 2 ；
S is the height of the cavity space of the rod cavity of the loading oil cylinder, and mm;
m 2 Kg (depending on the installation form, if placed horizontally at 0) for loading the cylinder piston mass;
m 3 is oil mass, kg, m 3 
The method comprises the steps of carrying out a first treatment on the surface of the (if placed horizontally at 0, depending on the installation form);
x n the formula relation is satisfied:
wherein k is the displacement speed of the loading cylinder and is mm/s; f is the impact frequency, hz;
the method for obtaining the impact frequency comprises the following steps:
because the pressure and displacement change frequency of the impacted test system has the same frequency as the tested object, the impact frequency value of the equipment can be calculated by carrying out FFT conversion on the displacement curve of the piston rod of the loading cylinder, the loading cylinder or the pressure curve of the impacted cylinder:
f=FFT（x）=FFT（P up ）=FFT（P uf ）
wherein,,
x is the displacement of a piston rod of the loading oil cylinder;
P up the pressure of the rodless cavity of the impact cylinder is MPa;
P uf the pressure of the rodless cavity of the oil cylinder is loaded, and the pressure is MPa;
the method for obtaining the impact power comprises the following steps:
wherein P is impact power, KW.
2. The impact performance testing system of a hydraulic rock drill according to claim 1, wherein the impacted cylinder is connected to the drill bit of the hydraulic rock drill through a connecting sleeve.
3. The impact performance testing system of a hydraulic rock drill according to claim 2, wherein the connection sleeves are replaced with connection sleeves of different specifications to accommodate different specifications of drill heads.
4. The impact performance testing system of a hydraulic rock drill according to claim 1, wherein the pressure sensor, the temperature sensor, the flow sensor, the displacement sensor are connected to a collection system, which is connected to a computer.
5. The impact performance testing system of a hydraulic rock drill according to claim 1, further comprising a loading test bed and an impact bed, wherein the impacted cylinder, the thrust beam, and the hydraulic rock drill are mounted on the impact bed, and wherein the loading cylinder, the mating hydraulic valve block, and the accumulator are mounted on the loading test bed.
6. The impact performance test system of a hydraulic rock drill according to claim 1, wherein a displacement sensor is installed at a front end of the loading cylinder for acquiring displacement data of the loading cylinder in real time.
7. The impact performance test system of a hydraulic rock drill according to claim 1, wherein the rodless cavity of the impacted cylinder and the rodless cavity of the loading cylinder are provided with one-way valves and are connected by a hard pipe.
8. The impact performance test system of the hydraulic rock drill according to claim 1, wherein the system further comprises an electric control cabinet, the pressure sensor is connected with a pressure secondary display instrument of the electric control cabinet, and the pressure secondary display instrument displays an instantaneous pressure value;
the flow sensor is connected with a flow secondary display instrument of the electric control cabinet, and the flow secondary display instrument displays an instantaneous flow value;
the temperature sensor is connected with a temperature secondary display instrument of the electric control cabinet, and the temperature secondary display instrument displays an instant temperature value.
9. A method of testing the impact performance of a hydraulic rock drill, the method comprising:
constructing an impact performance test system of the hydraulic rock drill according to any one of claims 1-8;
opening system software, setting a test channel, setting sensor parameters, sampling frequency, measuring range and output mode, and preparing for starting test;
the loading oil cylinder and the impacted oil cylinder are adjusted to specified positions, and a pushing oil cylinder applies pushing force to the hydraulic rock drill and ensures that a drill bit of the rock drill, a connecting sleeve and a piston rod of the impacted oil cylinder are tightly attached after the pushing force is applied; the hydraulic rock drill is propelled at this time, and the system is in a static state;
the hydraulic rock drill starts to impact, the loading oil cylinder and the impacted oil cylinder start to move under the impact force of the rock drill, the sensor collects data and transmits the data to the computer through the collecting system, and the computer calculates the impact performance through the data to obtain the impact energy, the impact frequency and the impact power of the hydraulic rock drill;
setting different overflow pressures of the loading overflow valves, repeating the steps, and simulating the impact performance of the hydraulic rock drill and the drilling amount under the rocks with different hardness when the rocks with different hardness are impacted.
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| CN116816763B (en) * | 2023-08-09 | 2024-01-26 | 北京科技大学 | Loading impact device for rock drill test |
| CN117267191B (en) * | 2023-11-16 | 2024-02-20 | 徐州徐工基础工程机械有限公司 | Power station of rock drill test stand |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4006783A (en) * | 1975-03-17 | 1977-02-08 | Linden-Alimak Ab | Hydraulic operated rock drilling apparatus |
| CN107543734A (en) * | 2017-08-17 | 2018-01-05 | 张日龙 | A kind of test system and its method of testing of hydraulic gate performance |
| CN109869362A (en) * | 2019-01-31 | 2019-06-11 | 中国铁建重工集团有限公司 | For simulating the hydraulic system of rock drilling load and the analog detection method of rock drilling load |
| WO2019116331A1 (en) * | 2017-12-15 | 2019-06-20 | Van Der Walt Jan Daniel | Rock drill testing |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI115552B (en) * | 2002-11-05 | 2005-05-31 | Sandvik Tamrock Oy | Arrangement for controlling rock drilling |
| CN101776512B (en) * | 2010-02-11 | 2011-11-09 | 桂林穿孔公司 | Hydraulic jackdrill reliable test-bed |
| CN201680981U (en) * | 2010-03-05 | 2010-12-22 | 广东工业大学 | Impact property testing unit of rock drilling impactor |
| CN102536109B (en) * | 2011-12-26 | 2014-07-09 | 三一重型装备有限公司 | Rock drilling impact pressure regulating device and rock drilling machine with same |
| CN107621379B (en) * | 2017-10-27 | 2024-05-28 | 中国铁建重工集团股份有限公司 | Test equipment for drilling trolley |
| CN110374578A (en) * | 2019-08-09 | 2019-10-25 | 桂林航天工业学院 | One kind being used for hydraulic impact machine performance testing device |
| CN215444558U (en) * | 2021-07-08 | 2022-01-07 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Detection platform of mining rock drill |
-
2022
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4006783A (en) * | 1975-03-17 | 1977-02-08 | Linden-Alimak Ab | Hydraulic operated rock drilling apparatus |
| CN107543734A (en) * | 2017-08-17 | 2018-01-05 | 张日龙 | A kind of test system and its method of testing of hydraulic gate performance |
| WO2019116331A1 (en) * | 2017-12-15 | 2019-06-20 | Van Der Walt Jan Daniel | Rock drill testing |
| CN109869362A (en) * | 2019-01-31 | 2019-06-11 | 中国铁建重工集团有限公司 | For simulating the hydraulic system of rock drilling load and the analog detection method of rock drilling load |
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