CN106988742A - Hydraulic pump drive hydraulic shock pick closed system and its control method - Google Patents
Hydraulic pump drive hydraulic shock pick closed system and its control method Download PDFInfo
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- CN106988742A CN106988742A CN201710247349.9A CN201710247349A CN106988742A CN 106988742 A CN106988742 A CN 106988742A CN 201710247349 A CN201710247349 A CN 201710247349A CN 106988742 A CN106988742 A CN 106988742A
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- 230000035939 shock Effects 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000012530 fluid Substances 0.000 claims abstract description 188
- 239000007788 liquid Substances 0.000 claims abstract description 118
- 238000001802 infusion Methods 0.000 claims abstract description 34
- 238000004891 communication Methods 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 20
- 239000011435 rock Substances 0.000 abstract description 10
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C31/00—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam
- E21C31/02—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam for cutting or breaking-down devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/02—Machines slitting solely by one or more percussive tools moved through the seam
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The present invention discloses a kind of hydraulic pump drive hydraulic shock pick closed system and its control method, and system includes：Motor, hydraulic pump, fluid infusion pump, liquid case and at least one set of hydraulic shock pick, wherein：The rotating shaft of the motor is connected with the hydraulic pump, the fluid infusion of the hydraulic pump is connected with the liquid outlet of the fluid infusion pump, the inlet of the fluid infusion pump is connected with the liquid case, and two supply openings of the hydraulic pump are connected by the first fluid path, the second fluid path with the hydraulic shock pick respectively.The present invention passes through motor-driven hydraulic pumps, so that pressure fluid passes through enclosed fluid path, the multigroup hydraulic shock pick being connected with enclosed fluid path of driving is moved back and forth, constant impingement is carried out to coal and rock, so that installing the cutting drum of the hydraulic shock pick of the present invention in coal cutting rock turning course, crushed zone is produced to the synchronous impact of coal petrography by pick, the cutting resistance of coal and rock is reduced.
Description
Technical field
The present invention relates to coal mining correlative technology field, particularly a kind of hydraulic pump drive hydraulic shock pick closed system and
Its control method.
Background technology
The coal-winning machine in colliery, the roller of development machine pick and blade and coal and rock during broken coal petrography occur extruding and rubbed
Wipe, consumption accounts for the 1/3-1/2 of cutting power in the power compressed and rubbed against.As the hardness of coal is the increase of F values, pick and
The rate of wear of blade is also accelerated therewith, and the pick and blade of heavy wear increase cutting resistance, the work of cut transmission system
Condition also tends to deterioration.If drum maintenance and pick are changed not in time, easily cause rocking arm to be in overload, trigger machinery event
Barrier, or even the gear train assembly of cut drive division fail.Pick and compressing and rubbing against for blade and coal body are gone back in cutting course
Substantial amounts of smalls and dust are generated, mines or driving face will also take dust prevention and control measure.
The content of the invention
Based on this, it is necessary to which for prior art, pick and blade occur to extrude and rub with coal and rock during broken coal petrography
There is provided a kind of hydraulic pump drive hydraulic shock pick closed system and its control method for the technical problem of wiping influence efficiency.
The present invention provides a kind of hydraulic pump drive hydraulic shock pick closed system, including：Motor, hydraulic pump, fluid infusion pump,
Liquid case and at least one set of hydraulic shock pick, wherein：
The rotating shaft of the motor is connected with the hydraulic pump, the fluid infusion of the hydraulic pump and the liquid outlet of the fluid infusion pump
Connection, the inlet of the fluid infusion pump connects with the liquid case, and two supply openings of the hydraulic pump pass through the first fluid path, the respectively
Two fluid path are connected with the hydraulic shock pick.
Further, the hydraulic pump includes two groups of liquid supply parts, every group of liquid supply part include hydraulic pump piston, connecting rod,
Hydraulic pump hydraulic cylinder, crank arm, adjustable connecting-rod axle journal and bent axle input shaft, wherein：
The hydraulic pump piston is contained in the hydraulic pump hydraulic cylinder, described hydraulic pump hydraulic cylinder one end and the fluid infusion
Mouth connection, the other end of the hydraulic pump hydraulic cylinder of liquid supply part described in one group is connected with first fluid path, another group of institute
The other end for stating the hydraulic pump hydraulic cylinder of liquid supply part is connected with second fluid path, and liquid supply part is described described in one group
The hydraulic pump piston of hydraulic pump piston and liquid supply part described in another group is arranged symmetrically, and push-and-pull is in opposite direction；
The adjustable connecting-rod axle journal is arranged on the crank arm, and the adjustable connecting-rod axle journal and the bent axle input shaft
Bias connection, the output shaft of the bent axle input shaft and the motor is coaxially connected, the front end of the connecting rod and the hydraulic pump
Piston is connected, and the end of the connecting rod is connected with the adjustable connecting-rod axle journal, and connecting rod described in two and the adjustable connecting-rod axle journal
Axis it is vertical, the adjustable connecting-rod axle journal and the bent axle input shaft axis distance can be adjusted by being provided with the crank arm
Adjusting screw.
Further, in addition to control device, first pressure sensor, second pressure sensor, the first magnetic valve, second
Magnetic valve and the 3rd magnetic valve, the fluid infusion pump are provided with liquid return hole, and the liquid return hole passes through first magnetic valve and described the
One fluid path is connected, and the liquid return hole is connected by second magnetic valve with second fluid path, and the liquid return hole passes through described
3rd magnetic valve is connected with the liquid case, and the first pressure sensor is arranged on first fluid path, and the second pressure is passed
Sensor is arranged on second fluid path, and the output of the output end of the first pressure sensor and the second pressure sensor
End is communicated to connect with the input of the control device respectively, and the control output end of the control device is electric with described first respectively
The control end of magnet valve, the control end of second magnetic valve, the communication connection of the control end of the 3rd magnetic valve.
Further, in addition to the 4th magnetic valve, the 5th magnetic valve, the first temperature sensor, second temperature sensor,
The liquid case includes the first cut-off portion and the second cut-off portion of temperature isolation, and the first cut-off portion and the second cut-off portion are logical
The connection of liquid case heat exchanger is crossed, wherein：
The liquid return hole of the fluid infusion pump is connected by the 3rd magnetic valve with the first cut-off portion of the liquid case, institute
State the first fluid path to connect with the second cut-off portion of the liquid case by the 4th magnetic valve, second fluid path passes through described
Five magnetic valves are connected with the second cut-off portion of the liquid case, and output end, the second temperature of first temperature sensor are passed
The output end of sensor is communicated to connect with the input of the control device respectively, the control output end of the control device respectively with
The control end of 4th magnetic valve, the communication connection of the control end of the 5th magnetic valve.
Further, in addition to the first flow sensor that is arranged in first fluid path and it is arranged on described
Second flow sensor in second fluid path, the output end of the first flow sensor, the second flow sensor it is defeated
Go out input of the end respectively with the control device to communicate to connect, the motor is variable-frequency motor, the frequency conversion of the control device
Output end and the VFC end of the variable-frequency motor are communicated to connect.
Further, in addition to it is arranged on filter and storage in first fluid path and/or in second fluid path
Can device.
Further, in addition to it is arranged on the fluid path heat exchanger in first fluid path and/or in second fluid path.
Further, the hydraulic shock pick includes impact hydraulic cylinder, impact piston and pick, the impact piston
It is contained in the impact hydraulic cylinder, and the pick is fixed on the end of the impact piston, the impact hydraulic cylinder is provided with
Two impact hydraulic cavities, two impact hydraulic cavities pass through the first fluid path and the second fluid path and the supply opening of the hydraulic pump respectively
Connection.
The present invention provides a kind of control method of foregoing hydraulic pump drive hydraulic shock pick closed system, bag
Include：
The pressure of first fluid path is monitored as first pressure, the pressure of second fluid path is monitored as the second pressure
Power；
When the first pressure is less than preset pressure threshold value, then controls the liquid case to the first fluid path feed flow, work as institute
Second pressure is stated less than preset pressure threshold value, then controls the liquid case to the second fluid path feed flow；
When the first pressure is more than or equal to preset pressure threshold value, then the liquid case is controlled to stop to first fluid path
Feed flow, when the second pressure is more than or equal to preset pressure threshold value, then controls the liquid case to stop supplying to second fluid path
Liquid.
Further, in addition to：
The temperature of first fluid path is monitored as the first temperature, the temperature of second fluid path is monitored as the second temperature
Degree；
When first temperature is higher than preset temperature threshold value, then controls first fluid path to return liquid to the liquid case, work as institute
Second temperature is stated higher than preset temperature threshold value, then controls second fluid path to return liquid to the liquid case；
When first temperature is less than or equal to preset temperature threshold value, then first fluid path is controlled to stop to the liquid case
Liquid is returned, when the second temperature is less than or equal to preset temperature threshold value, then controls second fluid path to stop returning to the liquid case
Liquid.
Further, in addition to：
The flow of first fluid path is monitored as first flow, the flow for monitoring second fluid path is used as second
Amount；
When the first flow then drops higher than preset flow threshold value, or the second flow higher than preset flow threshold value
The running frequency of the low motor；
When the first flow is then raised less than preset flow threshold value, and the second flow less than preset flow threshold value
The running frequency of the motor.
The present invention passes through motor-driven hydraulic pumps so that pressure fluid drives multigroup and enclosed fluid path to connect by enclosed fluid path
The hydraulic shock pick connect is moved back and forth, and constant impingement is carried out to coal and rock, so that the hydraulic shock for installing the present invention is cut
The cutting drum of tooth produces crushed zone to the synchronous impact of coal petrography by pick, reduces coal petrography in coal cutting rock turning course
The cutting resistance of body.
Brief description of the drawings
Fig. 1 is a kind of system schematic of hydraulic pump drive hydraulic shock pick closed system of the invention；
Fig. 2 is the front view of hydraulic pump of the present invention；
Fig. 3 is Fig. 2 A-A profiles；
Fig. 4 is the top view of hydraulic pump of the present invention；
Fig. 5 is Fig. 4 B-B profiles；
Fig. 6 is the sectional view of hydraulic pump of the present invention；
Fig. 7 is the side view of hydraulic pump of the present invention；
Fig. 8 is Fig. 7 C-C profiles；
Fig. 9 is a kind of workflow diagram of the control method of hydraulic pump drive hydraulic shock pick closed system of the invention.
Embodiment
The present invention will be further described in detail with specific embodiment below in conjunction with the accompanying drawings.
It is a kind of system schematic of hydraulic pump drive hydraulic shock pick closed system of the invention as shown in Figure 1, including：
Motor 1, hydraulic pump 2, fluid infusion pump 3, liquid case 4 and at least one set of hydraulic shock pick 5, wherein：
The rotating shaft of the motor 1 is connected with the hydraulic pump 2, the fluid infusion of the hydraulic pump 2 and going out for the fluid infusion pump 3
Liquid mouthful connection, the inlet of the fluid infusion pump 3 is connected with the liquid case 4, and two supply openings of the hydraulic pump 2 pass through first respectively
Fluid path 6, the second fluid path 7 are connected with the hydraulic shock pick 5.
Specifically, motor 1, hydraulic pump 2 and fluid infusion pump 3 are arranged in frame 8, then by fluid infusion pump 3 from liquid case 4
Middle fluid infusion, liquid can be oil, to produce hydraulic pressure.Fluid infusion pump 3 inputs liquid into hydraulic pump 2, and hydraulic pump 2 passes through the first fluid path
6th, the second fluid path 7 drives hydraulic shock pick to multigroup feed flow of hydraulic shock pick 5.
The present invention passes through motor-driven hydraulic pumps so that pressure fluid drives multigroup and enclosed fluid path to connect by enclosed fluid path
The hydraulic shock pick connect is moved back and forth, and constant impingement is carried out to coal and rock, so that the hydraulic shock for installing the present invention is cut
The cutting drum of tooth produces crushed zone to the synchronous impact of coal petrography by pick, reduces coal petrography in coal cutting rock turning course
The cutting resistance of body.
As shown in Fig. 2~8, in one of the embodiments, the hydraulic pump 2 includes two groups of liquid supply parts, every group of feed flow
Part include hydraulic pump piston 201, connecting rod 202, hydraulic pump hydraulic cylinder 203, crank arm 204, adjustable connecting-rod axle journal 205 and
Bent axle input shaft 206, wherein：
The hydraulic pump piston 201 is contained in the hydraulic pump hydraulic cylinder 203, described one end of hydraulic pump hydraulic cylinder 203
Connected with the fluid infusion, the other end and first fluid path 6 of the hydraulic pump hydraulic cylinder 203 of liquid supply part described in one group
Connection, the other end of the hydraulic pump hydraulic cylinder 203 of liquid supply part described in another group is connected with second fluid path 7, one group
The symmetrical cloth of the hydraulic pump piston 201 of the hydraulic pump piston 201 of the liquid supply part and liquid supply part described in another group
Put, and push-and-pull is in opposite direction；
The adjustable connecting-rod axle journal 205 is arranged on the crank arm 204, and the adjustable connecting-rod axle journal 205 with it is described
The eccentric connection of bent axle input shaft 206, the output shaft of the bent axle input shaft 206 and the motor 1 is coaxially connected, the connecting rod
202 front end is connected with the hydraulic pump piston 201, and the end of the connecting rod 202 is connected with stating adjustable connecting-rod axle journal 205, and
Connecting rod 202 described in two is vertical with the axis of the adjustable connecting-rod axle journal 205, and institute can be adjusted by being provided with the crank arm 204
State the adjusting screw 207 of adjustable connecting-rod axle journal 205 and the axial line distance of bent axle input shaft 206.
Specifically, the electromagnetic torque that motor 1 is exported is by driving adjustable connecting-rod bearing crankshaft pump work to wheel set 11.
The hydraulic pump 2 of the present embodiment is double-piston, and two hydraulic pump pistons are respectively that the first fluid path and the second fluid path are provided
Push-and-pull before and after pressure fluid, two hydraulic pump pistons so that the pressure of the pressure fluid of the first fluid path and the second fluid path changes, so that
Promote hydraulic shock pick.Meanwhile, the present embodiment changes adjustable connecting-rod axle journal 205 and bent axle input shaft by adjusting screw 207
Distance between (trunnion) 206, so that the moving radius of the connecting rod 202 moved with adjustable connecting-rod axle journal 205 changes,
The push-and-pull stroke of hydraulic pump piston 201 also changes therewith, so as to change its output flow.The change of flow passes through the first fluid path 6
With the conduction of the second fluid path 7, the adjustment of the impact stroke of hydraulic shock pick 5 is realized.
In one of the embodiments, in addition to control device 9, first pressure sensor 10, second pressure sensor 11,
First magnetic valve 12, the second magnetic valve 13 and the 3rd magnetic valve 14, the fluid infusion pump 3 are provided with liquid return hole, and the liquid return hole passes through
First magnetic valve 12 is connected with first fluid path 6, and the liquid return hole passes through second magnetic valve 13 and described second
Fluid path 7 is connected, and the liquid return hole is connected by the 3rd magnetic valve 14 with the liquid case 4, the first pressure sensor 10
First fluid path 6 is arranged on, the second pressure sensor 11 is arranged on second fluid path 7, and the first pressure is passed
The input 91 of the output end of sensor 10 and the output end of the second pressure sensor 11 respectively with the control device 9 communicates
Connection, the control output end 92 of the control device 9 control end respectively with first magnetic valve 12, second magnetic valve
13 control end, the communication connection of the control end of the 3rd magnetic valve 14.
Specifically, when system starts, motor-driven hydraulic pumps 2 and fluid infusion pump 3 work, now, by the basis of control device 9
Setup parameter controls the first magnetic valve 12, the second magnetic valve 13 and the energization work of the 3rd magnetic valve 14, wherein the first magnetic valve 12,
Second magnetic valve 13 must to conduct, the 3rd magnetic valve 14 for it is electrically disconnected, so as to pass through first the 12, second electricity of magnetic valve respectively
The pressure fluid that fluid infusion pump 3 is exported from liquid return hole is output to magnet valve 13 into the first fluid path 6 and the second fluid path 7 carries out fluid infusion.When first
The pressure of fluid path is reached after setting value where pressure sensor 10 or second pressure sensor 11 are detected, to the first magnetic valve
12nd, the second magnetic valve 13 and the 3rd magnetic valve 14 are powered off, then the first magnetic valve 12, the power-off of the second magnetic valve 13 disconnects, and stops mending
Oil, and the power-off conducting of the 3rd magnetic valve 14, so that the liquid that returns of fluid infusion pump 3 is back into liquid case 4.
And after fluid path pressure is less than setting value where first pressure sensor 10 and second pressure sensor 11 are detected,
The first magnetic valve 12, the second magnetic valve 13 and the energization work of the 3rd magnetic valve 14 are then controlled, fluid infusion is carried out.
The present embodiment is controlled by control device to the pressure fluid of fluid path so that pressure fluid can be according to pressure change
Automatic supply.
In one of the embodiments, in addition to the 4th magnetic valve 15, the 5th magnetic valve 16, the first temperature sensor 22,
Second temperature sensor 23, the liquid case includes the first cut-off portion and the second cut-off portion of temperature isolation, the first cut-off portion
Connected with the second cut-off portion by liquid case heat exchanger, wherein：
The liquid return hole of the fluid infusion pump 3 is connected by the first cut-off portion of the 3rd magnetic valve 14 and the liquid case 4
Logical, first fluid path 6 is connected by the 4th magnetic valve 15 with the second cut-off portion of the liquid case 4, second fluid path 7
Connected by the 5th magnetic valve 16 with the second cut-off portion of the liquid case 4, the output end of first temperature sensor 22,
Input 91 of the output end of the second temperature sensor 23 respectively with the control device 9 is communicated to connect, the control dress
Control end, the control end of the 5th magnetic valve 16 of 9 control output end 92 respectively with the 4th magnetic valve 15 is put to communicate
Connection.
Specifically, the temperature of fluid path exceedes where the first temperature sensor 22 or second temperature sensor 23 are detected
During preset value, then control device 9 controls the 4th magnetic valve 15, the 5th magnetic valve 16 to conduct, so that by the pressure fluid of high temperature
From the outflow of corresponding fluid path.Because pressure fluid flows out from fluid path, therefore the pressure reduction of the fluid path, when first pressure sensor 10
Fluid path pressure is less than after setting value where being detected with second pressure sensor 11, then controls the first magnetic valve 12, the second electromagnetism
Valve 13 and the energization work of the 3rd magnetic valve 14, from the pressure fluid of liquid case supplement low temperature to corresponding fluid path.
Specifically, the liquid case of the present embodiment is divided at least two parts of temperature isolation so that high temperature pressure liquid energy is flowed into
Second cut-off portion, is then that fluid path supplements low-temperature pressure liquid from the first cut-off portion, and by liquid case heat exchanger to high temperature pressure liquid
Cooling, realizes the recycling of pressure fluid.
The present embodiment carries out temperature monitoring by temperature sensor to fluid path, it is to avoid the too high influence equipment work of fluid path temperature
Make.
In one of the embodiments, in addition to the first flow sensor 17 that is arranged in first fluid path 6 and
It is arranged on the second flow sensor 18 in second fluid path 7, the output end of the first flow sensor 17, described second
Input 91 of the output end of flow sensor 18 respectively with the control device 9 is communicated to connect, and the motor 1 is variable-frequency electric
Machine, the frequency conversion output end 93 of the control device 9 is communicated to connect with the VFC end of the variable-frequency motor.
Specifically, the flow detected in fluid path when first flow sensor 17 or second flow sensor 18 is excessive
When, frequency is reduced by the controlled motor 1 of control device 9, and when first flow sensor 17 or second flow sensor 18 are detected
When flow in fluid path is too small, frequency is raised by the controlled motor 1 of control device 9 so that the flow constant of pressure fluid.
The present embodiment can realize good intelligent control to Strike hob according to the flow controlled motor frequency in fluid path,
Dynamics is impacted to it and frequency of impact is precisely controlled, electrical control reaction speed is high, sensitivity is strong, using variable-frequency motor energy according to
Control requires to carry out the adjustment of power and torque in real time.
In one of the embodiments, in addition to it is arranged in first fluid path 6 and/or in second fluid path 7
Filter 19 and accumulator 20.
In one of the embodiments, in addition to it is arranged in first fluid path 6 and/or in second fluid path 7
Fluid path heat exchanger 21.
The present embodiment sets fluid path heat exchanger 21 to cool the pressure fluid in fluid path, to avoid fluid path temperature too high.
In one of the embodiments, the hydraulic shock pick 5 includes impact hydraulic cylinder 51, impact piston 52 and pick
53, the impact piston 52 is contained in the impact hydraulic cylinder 51, and the pick 53 is fixed on the impact piston 52
End, the impact hydraulic cylinder 51 is provided with two impact hydraulic cavities 511, and two impact hydraulic cavities 511 pass through the first liquid respectively
The fluid path 7 of road 6 and second is connected with the supply opening of the hydraulic pump 3.
The present embodiment hydraulic pump 3 impacts hydraulic pressure with the two of impact hydraulic cylinder 51 respectively by the first fluid path 6 and the second fluid path 7
Chamber 511 is connected, and forms two independent enclosed fluid path, when motor 1 drives two pistons to carry out repeatedly liquid sucking-discharging work, passes through
The transmission of liquid makes the pick 53 on the impact piston 52 of impact hydraulic cylinder 51 form reciprocal ballistic motion and fractured coal and rock.
It is illustrated in figure 9 a kind of controlling party of foregoing hydraulic pump drive hydraulic shock pick closed system of the present invention
Method, including：
Step S901, monitors the pressure of first fluid path as first pressure, the pressure for monitoring second fluid path is made
For second pressure；
Step S902, when the first pressure is less than preset pressure threshold value, then controls the liquid case to first fluid path
Feed flow, when the second pressure is less than preset pressure threshold value, then controls the liquid case to the second fluid path feed flow；
Step S903, when the first pressure is more than or equal to preset pressure threshold value, then controls the liquid case to stop to institute
The first fluid path feed flow is stated, when the second pressure is more than or equal to preset pressure threshold value, then controls the liquid case to stop to described
Second fluid path feed flow.
In preferred embodiment, first pressure sensor 10 and second pressure sensor 11 can be used to detect institute
In fluid path pressure, liquid case is controlled to the break-make of fluid path feed flow using the first magnetic valve 12, the second magnetic valve 13.
In one of the embodiments, in addition to：
The temperature of first fluid path is monitored as the first temperature, the temperature of second fluid path is monitored as the second temperature
Degree；
When first temperature is higher than preset temperature threshold value, then controls first fluid path to return liquid to the liquid case, work as institute
Second temperature is stated higher than preset temperature threshold value, then controls second fluid path to return liquid to the liquid case；
When first temperature is less than or equal to preset temperature threshold value, then first fluid path is controlled to stop to the liquid case
Liquid is returned, when the second temperature is less than or equal to preset temperature threshold value, then controls second fluid path to stop returning to the liquid case
Liquid.
In preferred embodiment, the first temperature sensor 22, the detection of second temperature sensor 23 institute can be used
In the temperature of fluid path, fluid path is controlled to return liquid to liquid case using the 4th magnetic valve 15, the 5th magnetic valve 16.
In one of the embodiments, in addition to：
The flow of first fluid path is monitored as first flow, the flow for monitoring second fluid path is used as second
Amount；
When the first flow then drops higher than preset flow threshold value, or the second flow higher than preset flow threshold value
The running frequency of the low motor；
When the first flow is then raised less than preset flow threshold value, and the second flow less than preset flow threshold value
The running frequency of the motor.
In preferred embodiment, motor 2 can use variable-frequency motor, can use first flow sensor 17,
The flow of fluid path where the detection of second flow sensor 18, and using the running frequency of the controlled motor 2 of control device 9.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of hydraulic pump drive hydraulic shock pick closed system, it is characterised in that including：Motor, hydraulic pump, fluid infusion pump,
Liquid case and at least one set of hydraulic shock pick, wherein：
The rotating shaft of the motor is connected with the hydraulic pump, and the fluid infusion of the hydraulic pump and the liquid outlet of the fluid infusion pump connect
Logical, the inlet of the fluid infusion pump is connected with the liquid case, and two supply openings of the hydraulic pump pass through the first fluid path, second respectively
Fluid path is connected with the hydraulic shock pick.
2. hydraulic pump drive hydraulic shock pick closed system according to claim 1, it is characterised in that the hydraulic pump
Including two groups of liquid supply parts, every group of liquid supply part includes hydraulic pump piston, connecting rod, hydraulic pump hydraulic cylinder, crank arm, adjustable connecting-rod
Axle journal and bent axle input shaft, wherein：
The hydraulic pump piston is contained in the hydraulic pump hydraulic cylinder, and described hydraulic pump hydraulic cylinder one end connects with the fluid infusion
Logical, the other end of the hydraulic pump hydraulic cylinder of liquid supply part described in one group is connected with first fluid path, is supplied described in another group
The other end of the hydraulic pump hydraulic cylinder of liquid part is connected with second fluid path, the hydraulic pressure of liquid supply part described in one group
The hydraulic pump piston of pump piston and liquid supply part described in another group is arranged symmetrically, and push-and-pull is in opposite direction；
The adjustable connecting-rod axle journal is arranged on the crank arm, and the adjustable connecting-rod axle journal inputs eccentric shaft with the bent axle
Connection, the output shaft of the bent axle input shaft and the motor is coaxially connected, the front end of the connecting rod and the hydraulic pump piston
Connection, the end of the connecting rod is connected with the adjustable connecting-rod axle journal, and the axle of connecting rod described in two and the adjustable connecting-rod axle journal
Line is vertical, and the tune of the adjustable connecting-rod axle journal and the bent axle input shaft axis distance can be adjusted by being provided with the crank arm
Save leading screw.
3. hydraulic pump drive hydraulic shock pick closed system according to claim 1, it is characterised in that also including control
Device, first pressure sensor, second pressure sensor, the first magnetic valve, the second magnetic valve and the 3rd magnetic valve, the fluid infusion
Pump is provided with liquid return hole, and the liquid return hole is connected by first magnetic valve with first fluid path, and the liquid return hole passes through institute
State the second magnetic valve to connect with second fluid path, the liquid return hole is connected by the 3rd magnetic valve with the liquid case, institute
State first pressure sensor and be arranged on first fluid path, the second pressure sensor is arranged on second fluid path, and institute
State the output end of first pressure sensor and the output end input respectively with the control device of the second pressure sensor
End communication connection, the control output end of control device control end respectively with first magnetic valve, second electromagnetism
The control end of valve, the communication connection of the control end of the 3rd magnetic valve.
4. hydraulic pump drive hydraulic shock pick closed system according to claim 3, it is characterised in that also including the 4th
Magnetic valve, the 5th magnetic valve, the first temperature sensor, second temperature sensor, the liquid case include temperature isolation first every
Disconnected portion and the second cut-off portion, the first cut-off portion are connected with the second cut-off portion by liquid case heat exchanger, wherein：
The liquid return hole of the fluid infusion pump is connected by the 3rd magnetic valve with the first cut-off portion of the liquid case, and described
One fluid path is connected by the 4th magnetic valve with the second cut-off portion of the liquid case, and second fluid path passes through the described 5th electricity
Magnet valve is connected with the second cut-off portion of the liquid case, output end, the second temperature sensor of first temperature sensor
Output end communicated to connect respectively with the input of the control device, the control output end of the control device respectively with it is described
The control end of 4th magnetic valve, the communication connection of the control end of the 5th magnetic valve.
5. hydraulic pump drive hydraulic shock pick closed system according to claim 3, it is characterised in that also including setting
First flow sensor in first fluid path and the second flow sensor being arranged in second fluid path, institute
State output end, the input of the output end of the second flow sensor respectively with the control device of first flow sensor
Communication connection, the motor is variable-frequency motor, the frequency conversion output end of the control device and the VFC of the variable-frequency motor
End communication connection.
6. the hydraulic pump drive hydraulic shock pick closed system according to any one of Claims 1 to 5, it is characterised in that
Also include being arranged on the fluid path heat exchanger in first fluid path and/or in second fluid path.
7. the hydraulic pump drive hydraulic shock pick closed system according to any one of Claims 1 to 5, it is characterised in that
The hydraulic shock pick includes impact hydraulic cylinder, impact piston and pick, and the impact piston is contained in the impact hydraulic pressure
In cylinder, and the pick is fixed on the end of the impact piston, and the impact hydraulic cylinder is provided with two impact hydraulic cavities, two institutes
Impact hydraulic cavities are stated to connect with the supply opening of the hydraulic pump by the first fluid path and the second fluid path respectively.
8. a kind of control method of hydraulic pump drive hydraulic shock pick closed system as described in any one of claim 1~7,
It is characterised in that it includes：
The pressure of first fluid path is monitored as first pressure, the pressure for monitoring second fluid path is used as second pressure；
When the first pressure is less than preset pressure threshold value, then the liquid case is controlled to the first fluid path feed flow, when described the
Two pressure are less than preset pressure threshold value, then control the liquid case to the second fluid path feed flow；
When the first pressure is more than or equal to preset pressure threshold value, then the liquid case is controlled to stop supplying to first fluid path
Liquid, when the second pressure is more than or equal to preset pressure threshold value, then controls the liquid case to stop to the second fluid path feed flow.
9. control method according to claim 8, it is characterised in that also include：
The temperature of first fluid path is monitored as the first temperature, the temperature for monitoring second fluid path is used as second temperature；
When first temperature is higher than preset temperature threshold value, then first fluid path is controlled to return liquid to the liquid case, when described the
Two temperature are higher than preset temperature threshold value, then control second fluid path to return liquid to the liquid case；
When first temperature is less than or equal to preset temperature threshold value, then first fluid path is controlled to stop returning to the liquid case
Liquid, when the second temperature is less than or equal to preset temperature threshold value, then controls second fluid path to stop returning liquid to the liquid case.
10. control method according to claim 8, it is characterised in that also include：
The flow of first fluid path is monitored as first flow, the flow for monitoring second fluid path is used as second flow；
When the first flow be higher than preset flow threshold value, or the second flow be higher than preset flow threshold value, then reduce institute
State the running frequency of motor；
When the first flow is then raised described less than preset flow threshold value, and the second flow less than preset flow threshold value
The running frequency of motor.
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