CN105114373B - The hydraulic control system of rock drill jump bit - Google Patents
The hydraulic control system of rock drill jump bit Download PDFInfo
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- CN105114373B CN105114373B CN201510473200.3A CN201510473200A CN105114373B CN 105114373 B CN105114373 B CN 105114373B CN 201510473200 A CN201510473200 A CN 201510473200A CN 105114373 B CN105114373 B CN 105114373B
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Abstract
The invention discloses a kind of hydraulic control systems of rock drill jump bit, belong to technical field of hydraulic, including load sensitive pump, one jump bit control valve with pressure sensor module, hydraulic impact hammer, motor and hydraulic oil container, load sensitive pump is driven by motor, and it is integrated with the flow control valve of regime flow output on load sensitive pump and limits the pressure-control valve of system maximum working pressure, the main oil inlet of load sensitive pump is connect with the main oil inlet of jump bit control valve, the main oil return opening of jump bit control valve connects fuel tank, the control port of the pressure feedback signal and load sensitive pump of jump bit control valve connects, the actuator port A and B of jump bit control valve are connect with the main oil return opening of hydraulic impact hammer and main oil inlet respectively.The present invention can improve the reliability, stability and the energy consumption for reducing hydraulic control system of rock drill jump bit hydraulic work system relative to the long-range Isobarically Control schemes of DRG, and simple system, of low cost.
Description
Technical field
The present invention relates to technical field of hydraulic, especially a kind of hydraulic control system for rock drill jump bit.
Background technology
Rock drill jump bit is mainly used in the mechanized construction of method of tunnel drilling and blasting, to realize rock drill in tunnel quickly
Efficiently tunneling construction, finding the rock drill jump bit HYDRAULIC CONTROL SYSTEM solution of high efficient and reliable is just particularly important.
It, need to be by the work of rock drill jump bit hydraulic control system if rock drill jump bit need to be made to be operated under small impact operating mode
Make pressure and flow is respectively set as 90bar and 90l/min；And to realize the large impact action of rock drill, then it needs system work
Make pressure and flow is respectively set as 130bar and 120l/min.Therefore it is not difficult to find that realize the large and small of rock drill jump bit
The normal switching for impacting two grades of functions then both needs control to flow into the flow of rock drill jump bit hydraulic oil, it is also desirable to control it
Operating pressure.To realize that the low energy consumption of two grades of functions of large and small impact of rock drill jump bit normally switches, therefore not only need to control
Flow into the flow of rock drill hydraulic oil, it is also desirable to control its operating pressure.
Producer mostly meets rock drilling using the long-range Isobarically Control technical solutions of the DRG of A10VSO variable pumps both at home and abroad at present
The pressure flow of machine jump bit matches demand, as shown in figure 4, the system schema by the long-range Isobarically Control pumps of an A10VSODRG,
Jump bit control bound, the pressure-control valve group of 5 overflow valves composition, the throttling valve group of 2 throttle valves compositions, one for supervising
Survey the hydraulic parts compositions such as damping hole, motor and the fuel tank of the pressure gauge of surge, hydraulic impact hammer, two 0.8mm.Its
In, be integrated on load sensitive pump flow control valve (11) and limit pump maximum working pressure pressure-control valve.
Start motor, make A10VSODRG variable pumps to system fuel feeding and pulls jump bit control bound handle and make spool position
Set and be in operating position 1. on small impact position, system working connection c after main valve will part oil by oil circuit a and through 0.8mm
Damping hole oil return box, another part pressure oil then through throttle valve group flow to jump bit make jump bit generation act, to make impact
Hammer generates the action of small impact, need to adjust and flow through the flow of throttle valve 2 in throttling valve group and be used in the pressure for monitoring surge
Power tabular value is shown as 90bar, and the hydraulic control mouth of valve 1 and valve 2 is passed through pressure through oil circuit b and oil circuit a respectively in pressure-control valve group at this time
Power oil simultaneously makes valve 1 and valve 2 commutate, and such system is just operated under 90bar constant pressures, meets the small impact of rock drill jump bit
Required operating pressure when action（90 bar）And flow（90 l/min are）Between matching relationship.Continue to pull jump bit control
Main valve handle processed makes spool position be in operating position 2. on large impact position, and system oil-way all leads to rock drill through the valve group that throttles
Jump bit similarly to make rock drill jump bit be operated in large impact position, need to adjust the flow for flowing through throttling valve group and make pressure gauge
Pressure value be shown as 130bar, the hydraulic control mouth of valve 1 makes valve 1 commutate through oil circuit b cut-in pressure oil in pressure-control valve group, and
For the hydraulic control mouth of valve 2 because oil circuit a no pressures oil is by making valve 2 that can not commutate, such system is just operated in the constant pressure of 130bar
Under power, the operating pressure needed for the action of rock drill jump bit large impact is realized（130 bar）And flow（120 l/min are）It
Between matching relationship.Although the program can realize the switching of the large and small percussion action of rock drill jump bit, system use compared with
More hydraulic parts increases complexity and the fault point of system, to reduce the reliability of system.
In addition, there are uncontrollable restriction losses at jump bit control bound for the long-range Isobarically Control technologies of DRG.When
A10VSODRG variable pumps are to system fuel feeding and when driving jump bit to act, the set pressure of valve 4 or valve 5 in pressure-control valve group
Py will be loaded in X mouthfuls of A10VSODRG variable pumps（Control mouth/outside control mouth）Place, since 2 both sides of flow control valve control the pressure of oil circuit
Poor P is constant（That is hydraulic pump outlet and X mouthfuls of pressure differences is constant, about 18bar or so）, the pressure Pb of output is pumped not higher than restriction
Pump the pressure-control valve 1 of maximum working pressure（210bar）In the case of when working, according to pump discharge pressure Pb calculation formula（Pb
=Py+∆P）It works and not by load P it is not difficult to find that pump output pressure Pb will be under a steady state valueLThe influence of variation.But
According to throttle flow rate formula（Q=K × A × (Pb-PL)k, k is discharge coefficient）It is not difficult to find that the flow q of input jump bit is not
Be only dependent upon throttling valve group in throttle valve opening area A, also with jump bit load pressure PLChange related, works as PLIt changes
When, the flow q for inputting jump bit can also follow the stability for changing and then affecting jump bit work.
If ignoring the loss in efficiency of hydraulic pump and jump bit, the energy loss of DRG remote pressure control systems predominantly saves
Flow the restriction loss at valve group, system effectiveness PL/ Pb, since the pressure Pb of pump output is by valve 4 in pressure-control valve group or valve 5
Set pressure Py determine that therefore the efficiency of system is mainly by jump bit load pressure PLIt determines.As load PLValue is close defeated with pump
System effectiveness is higher when the pressure Pb gone out, however real impact hammer load pressure PLValue is the value of a real-time change, works as load
Pressure PLWhen value is much smaller than hydraulic pressure pumping hole output pressure value Pb, the working efficiency of system will be with reduction.
Invention content
The technical problem to be solved in the present invention is to provide a kind of hydraulic control system of rock drill jump bit, the system is opposite
The long-range Isobarically Control schemes of DRG of A10 pumps are used in domestic and international producer, rock drill jump bit hydraulic work system can be improved
Reliability, stability and the energy consumption for reducing hydraulic control system, and it is simple system, of low cost.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of hydraulic pressure control of rock drill jump bit
System processed, it is characterised in that including load sensitive pump, a jump bit control valve with pressure sensor module, hydraulic impact hammer,
Motor and hydraulic oil container, the load sensitive pump is driven by motor, and regime flow is integrated on load sensitive pump
The flow control valve of output and the pressure-control valve for limiting system maximum working pressure, the main oil inlet of the load sensitive pump
Mouth is connect with the main oil inlet of jump bit control valve, and the main oil return opening of jump bit control valve connects fuel tank, jump bit control valve
Pressure feedback Ls（Load sensing, load-sensitive）Mouth is connect with X mouthfuls of the control port of load sensitive pump, jump bit control valve
Actuator port A and B connect respectively with the main oil return opening of hydraulic impact hammer and main oil inlet.
Further supplement is made to above structure, sets that there are two working position, respectively small punchings on the jump bit control valve
Position and large impact position are hit, the small impact position is connected to 90 bars of secondary relief beside jump bit control valve, large impact
Position is connected to 130 bars of secondary relief beside jump bit control valve.
Further supplement, the pressure-control valve are made to above structure and limit system maximum working pressure as 210-230
Bar, the hydraulic control mouth pressure difference at flow control valve both ends is 18 bars.
Further supplement is made to above structure, the jump bit control valve is equipped with pressure sensor module, which passes
Feel the load pressure in assemblies monitor system, and is fed back to X mouthfuls of the control port of load sensitive pump, load-sensitive pump discharge in real time
Pressure is to form equilibrium relation at flow control valve both ends in this way, i.e., value is constant；It is not difficult to obtain according to throttle flow rate formula
Conclusion, the output flow of jump bit control valveqBe only dependent upon the opening area of flow control valve, and it is unrelated with load variation thus
It ensure that the stability of system work；The energy loss of the system mostlys come from the restriction loss at jump bit control valve,
Its energy loss is that smaller due to being worth, the restriction loss at speed governing valve is also smaller, realizes the low energy consumption control of jump bit
System.
It is using advantageous effect caused by above-mentioned technical proposal：The present invention compared with present hydraulic control system,
Its structure composition is simple, reduces some unnecessary hydraulic parts, such as throttling valve group and pressure-control valve group etc., realizes
The output flow of jump bit control valve is unrelated with load, to improve the reliability and stability of hydraulic control system.In addition,
The system control scheme wants small compared to the restriction loss at traditional scheme control valve port, and therefore, which is effectively reduced
Energy consumption.
Description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is hydraulic control system scheme of the present invention；
Fig. 2 is the graphical symbol of jump bit control valve in Fig. 1；
Fig. 3 is the graphical symbol of load sensitive pump in Fig. 1；
Fig. 4 is the stoste pressure control system scheme of rock drill jump bit；
Fig. 5 is the characteristic working curve of hydraulic pump；
Wherein：1, load sensitive pump, 2, jump bit control valve, 3, hydraulic impact hammer, 4, motor, 5, hydraulic oil container, 6, pressure
Force control valve group, 7, pressure gauge, 8, damping hole, 9, throttling valve group, 11, flow control valve, 12, pressure-control valve.
Specific implementation mode
1-3 is it is found that present invention relates particularly to a kind of hydraulic control system of rock drill jump bit with reference to the accompanying drawings, the system packet
Include load sensitive pump 1, a jump bit control valve 2 with pressure sensor module, hydraulic impact hammer 3, motor 4 and hydraulic oil container
5, load sensitive pump 1 is driven by motor 4, and the flow control valve 11 of regime flow output is integrated on load sensitive pump 1
And the pressure-control valve 12 of system maximum working pressure is limited, main oil inlet and the jump bit control valve 2 of load sensitive pump 1
The connection of main oil inlet, the main oil return opening of jump bit control valve 2 connect fuel tank 5, Ls mouthful of the pressure feedback of jump bit control valve 2 with bear
X mouthfuls of connections of control port of sensitive pump 1 are carried, the actuator port A and B of jump bit control valve 2 are returned with the master of hydraulic impact hammer 3 respectively
Hydraulic fluid port is connected with main oil inlet.The present invention program is using hydraulic load sensitivity control technology simple realization rock drill jump bit institute
The operating pressure needed and flow matches demand, compared to the long-range Isobarically Control technologies of traditional DRG, the program is because simplifying system liquid
The quantity of casting die is to improve the reliability of rock drill jump bit hydraulic control system.In addition, the load-sensitive skill in scheme
Art significantly reduces the restriction loss at valve port, to realize rock drill jump bit low energy consumption control.
To make hydraulic load sensitivity control technology realize operating pressure and flow matches demand needed for rock drill jump bit,
This programme has selected jump bit control valve 2 shown in Fig. 2, is set on jump bit control valve 2 there are two working position, respectively small punching
Position and large impact position are hit, small impact position is connected to 90 bars of the secondary relief on 2 side of jump bit control valve, large impact position and punching
130 bars of the secondary relief connection on 2 side of hammer control valve, is impacted come the size that switching shock is hammered into shape by switching shock position and is moved
Make, wherein the operating position of jump bit control valve metered flow 1. and safe pressure separately design as 90l/min, 90bar；
Operating position metered flow 2. and safe pressure separately design as 120l/min, 130bar.
As shown in Figure 1, an A10VSODFR load sensitive pump and a jump bit control valve with pressure sensor module
Constitute a load sensing hydraulic control system.Wherein, the flow of regime flow output is integrated on load sensitive pump
Control valve 11 and the pressure-control valve 12 for limiting pump maximum working pressure.When the system is operating, rushing with pressure sensor module
Load pressure is fed back to load sensitive pump control port, place and the flow in pump by hammer control valve 2 by pressure sensor device
11 both ends of control valve form an equilibrium relation, i.e.,P b -P L It is 18bar to be worth constant.
Therefore, it is not difficult to draw a conclusion according to throttle flow rate formula, the output flow of jump bit control valveqIt is only dependent upon valve
Opening area, and with load variation it is unrelated to ensure that system work stability.The energy loss of system essentially from
Restriction loss at the jump bit control valve, energy loss be △ Q=（P b -P L ）×q, due toP b -P L Value is smaller（About
18bar）, therefore the restriction loss △ Q at speed governing valve are also smaller, realize the low energy consumption control of jump bit.
The present invention starts motor first when specifically used, pulls jump bit control valve handle, it is made to be operated in small impact
Position 1., hydraulic pump by according to jump bit control bound position 1. needed for metered flow 90l/min through oil circuit a to rock drill jump bit
Fuel feeding is carried out, according to jump bit surge and discharge relation it is found that system just generates the surge of 90bar, this impact
Pressure feeds back to the X mouths of pump through oil circuit c1, makes the outlet output pressure of pumpP b Slightly larger than the pressure P of impact oil circuitL(Pb=PL+
18bar), Fig. 5 is the characteristic working curve of A10VSODFR variable pumps, system this would operate in the A of Fig. 5 in small impact operating mode
Point position, characteristic curve is not difficult to find out from figure.When surge changes, the output pressure of pumping hole is also followed by change
Change, the pressure difference 18bar for being added in multi-way valve is made to remain constant, just hammer is negative so that 90l/min output flows are not hit in this way
The influence of variation is carried to improve the stability of system work.Multi-way valve handle is pulled again, it is made 1. to be cut from small impact position
When changing to large impact position 2., hydraulic pump by according to jump bit control bound position 2. needed for metered flow 120l/min through oil circuit
A carries out fuel feeding to rock drill jump bit, according to the surge in Fig. 1 with discharge relation figure it is found that the hydraulic oil of 120l/min
The surge of 130bar will be will produce when flowing into impact hammer device, this surge feeds back to the X mouths of pump through oil circuit c1, makes
The outlet output pressure of pump is close to the pressure for impacting oil circuit, and system would operate in the B points position of Fig. 5 at this time.Further, since
The outlet output pressure of pump is slightly larger than the pressure of impact oil circuit, therefore it is smaller to flow through the front and back pressure difference at valve port, is damaged according to throttling
Lose formula △ P=△p*qIt is found that restriction loss is also smaller caused by valve port, so the system schema energy consumption is smaller.
By being analyzed above it is found that simply realizing rock drill jump bit using load sensing hydraulic control system scheme
The hydraulic control system of holding function, less hydraulic part usage quantity composition substantially increases the reliability of system work.In addition,
It is improved at following two aspects compared to traditional long-range Isobarically Control technical solutions of DRG in performance：First, throttle valve
Restriction loss at group is smaller, therefore energy consumption is smaller；Second is that the influence that the flow q exported at throttling valve group does not change with load,
Therefore system better working stability.
Claims (1)
1. a kind of hydraulic control system of rock drill jump bit, it is characterised in that including load sensitive pump (1), a band pressure passes
Feel jump bit control valve (2), hydraulic impact hammer (3), motor (4) and the hydraulic oil container (5) of component, the load sensitive pump
(1) driven by motor (4), and be integrated on load sensitive pump (1) regime flow output flow control valve (11) and
The pressure-control valve (12) of restriction system maximum working pressure, main oil inlet and the jump bit control of the load sensitive pump (1)
The main oil inlet of valve (2) processed connects, the main oil return opening connection fuel tank (5) of jump bit control valve (2), jump bit control valve (2)
Ls mouthfuls of pressure feedback is connect with X mouthfuls of the control port of load sensitive pump (1), A and B points of the actuator port of jump bit control valve (2)
It is not connect with the main oil return opening of hydraulic impact hammer (3) and main oil inlet；
Working position, respectively small impact position and large impact position there are two being set on the jump bit control valve (2), the small punching
It hits position to be connected to 90 bars of secondary relief beside jump bit control valve (2), large impact position and jump bit control valve (2) side
130 bars of secondary relief connection；
The pressure-control valve (12) limits system maximum working pressure as 210-230 bars, flow control valve (11) both ends
Hydraulic control mouth pressure difference is 18 bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510473200.3A CN105114373B (en) | 2015-08-05 | 2015-08-05 | The hydraulic control system of rock drill jump bit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510473200.3A CN105114373B (en) | 2015-08-05 | 2015-08-05 | The hydraulic control system of rock drill jump bit |
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| CN105114373A CN105114373A (en) | 2015-12-02 |
| CN105114373B true CN105114373B (en) | 2018-09-25 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107543734B (en) * | 2017-08-17 | 2020-08-04 | 金华市秸和环保技术咨询有限公司 | System and method for testing performance of hydraulic rock drill |
| CN107893626A (en) * | 2017-12-20 | 2018-04-10 | 山东天瑞重工有限公司 | A kind of closed hydraulic drill work system |
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2015
- 2015-08-05 CN CN201510473200.3A patent/CN105114373B/en active Active
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| CN2594494Y (en) * | 2003-01-10 | 2003-12-24 | 徐州重型机械厂 | Hydraulic controller of constant-power variable control pump |
| CN101748969A (en) * | 2009-12-23 | 2010-06-23 | 三一重型装备有限公司 | Hydraulic control loop used for jackdrill and control system thereof |
| CN102927071A (en) * | 2012-11-14 | 2013-02-13 | 中煤科工集团重庆研究院 | Hydraulic anti-jamming control system for drill loader |
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Address after: 050000 Shijiazhuang Province, Luancheng City, Shijiazhuang province equipment Industrial Park, Yu Xiang street, No. 168 Applicant after: CRRC SHIJIAZHUANG CO., LTD. Address before: 050000 Shijiazhuang Province, Luancheng City, Shijiazhuang province equipment Industrial Park, Yu Xiang street, No. 168 Applicant before: CSR SHIJIAZHUANG ROLLING STOCK WORKS |
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