CN113983002A - Full-hydraulic transmission cutting method of boom-type heading machine - Google Patents
Full-hydraulic transmission cutting method of boom-type heading machine Download PDFInfo
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- CN113983002A CN113983002A CN202111188054.1A CN202111188054A CN113983002A CN 113983002 A CN113983002 A CN 113983002A CN 202111188054 A CN202111188054 A CN 202111188054A CN 113983002 A CN113983002 A CN 113983002A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000005540 biological transmission Effects 0.000 title claims abstract description 21
- 239000003921 oil Substances 0.000 claims abstract description 197
- 230000001502 supplementing effect Effects 0.000 claims abstract description 23
- 239000011435 rock Substances 0.000 claims abstract description 22
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 18
- 239000013589 supplement Substances 0.000 claims abstract description 3
- 238000006073 displacement reaction Methods 0.000 claims description 28
- 230000001105 regulatory effect Effects 0.000 claims description 24
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 238000013459 approach Methods 0.000 claims description 6
- 230000010349 pulsation Effects 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000005641 tunneling Effects 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1086—Drives or transmissions specially adapted therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a full hydraulic transmission cutting method of a cantilever type tunneling machine, which comprises the following steps: the oil tank is used for storing hydraulic oil; the oil supplementing system supplements hydraulic oil of the main circulating system; the main circulating system pressurizes the hydraulic oil to drive the cutting head to cut; when the cantilever type heading machine needs to be overhauled, the stop valve is opened to enable the hydraulic oil in the main circulation system to directly flow into the oil tank, wherein the stop valve is installed between the main circulation system and the oil tank. According to the method, a hydraulic transmission technology is introduced into a cutting system of the heading machine, stepless speed regulation is realized, high-pressure oil is output by driving a hydraulic pump, and then the variable motor is driven by the high-pressure oil to output the rotating speed, so that the rotating speed of the cutting head is finally matched with the optimal rock breaking rotating speed in real time, and the cutting efficiency is improved.
Description
Technical Field
The invention relates to the technical field of boom-type excavators, in particular to a full-hydraulic transmission cutting method of a boom-type excavator.
Background
In the actual working process of the heading machine, the heading machine can often cut coal seams of different types, and the geological features of the coal seams are different. When the heading machine works, the cutting load is unevenly distributed, the change frequency is high, and the nonlinearity is high, so that the cutting rotating speed of the heading machine cannot be matched with the rotating speed required by the load in real time when the heading machine works, the cutting efficiency is reduced, and therefore the cutting system of the heading machine has to have good rotating speed adjusting characteristic if the heading machine wants to improve the load adaptability.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: at present, the boom-type heading machine usually uses an alternating current motor and a speed reducer as a driving source of a cutting system, and can only cut at a constant rotating speed, so that the cutting performance of the heading machine is greatly reduced. If the variable frequency motor and the speed reducer are used as driving sources, the frequency converter and the speed reducer are easy to damage due to vibration of the cutting part, the production and maintenance cost is high, and the power density and the rated torque are small.
Disclosure of Invention
The present invention has been made in view of the above problems. The invention aims to provide a full-hydraulic transmission cutting method of a boom-type heading machine, which can improve the cutting efficiency.
In order to solve the technical problems, the invention adopts the technical scheme that: a full hydraulic transmission cutting method of a cantilever type heading machine comprises the following steps:
the oil tank is used for storing hydraulic oil;
the oil supplementing system supplements hydraulic oil of the main circulating system;
the main circulating system pressurizes the hydraulic oil to drive the cutting head to cut;
when the cantilever type heading machine needs to be overhauled, the stop valve is opened to enable the hydraulic oil in the main circulation system to directly flow into the oil tank, wherein the stop valve is installed between the main circulation system and the oil tank.
Furthermore, the main circulating system comprises a hydraulic pump and a variable motor, hydraulic oil is pressurized through the hydraulic pump, and the cutting head is driven to cut through an output shaft of the variable motor.
Further, still include:
presetting a first differential pressure value of a speed regulating valve, wherein an outlet of the speed regulating valve is connected with an inlet of the variable displacement motor;
measuring a real-time second differential pressure value of the given speed regulating valve, wherein the second differential pressure value is equal to the inlet pressure of the speed regulating valve minus the outlet pressure of the speed regulating valve;
if the second differential pressure value is not equal to the first differential pressure value, the displacement of the variable displacement motor is adjusted, so that the second differential pressure value approaches and is equal to the first differential pressure value.
Further, still include:
presetting a first rock breaking rotating speed of a cutting head;
measuring the real-time second rock breaking rotating speed of the cutting head;
and if the second rock breaking rotating speed is not equal to the first rock breaking rotating speed, adjusting the opening area of the variable motor to enable the second rock breaking rotating speed to approach and be equal to the first rock breaking rotating speed.
Further, the main circulation system comprises a hydraulic pump and a first overflow valve; the inlet of the speed regulating valve is connected with a hydraulic pump; a pipeline between an oil outlet of the hydraulic pump and an oil inlet of the variable displacement motor is a high-pressure oil way; a pipeline between an oil outlet of the variable motor and an oil inlet of the hydraulic pump is a low-pressure oil way; the inlet of the first overflow valve is connected with the high-pressure oil way, and the outlet of the first overflow valve is connected with the low-pressure oil way.
Furthermore, the main circulation system further comprises a pressure stabilizing energy accumulator, the pressure stabilizing energy accumulator is located in the high-pressure oil way, and the pressure stabilizing energy accumulator is used for absorbing and stabilizing flow pulsation and hydraulic impact, so that oil of the variable displacement motor is kept stable.
Further, the oil replenishing system comprises:
an oil inlet of the oil supplementing pump is connected with the oil tank;
an inlet of the second overflow valve is connected with an oil outlet of the variable displacement motor, and an outlet of the second overflow valve is connected with the oil tank;
and the inlet of the third overflow valve is connected with the oil inlet of the hydraulic pump, and the outlet of the third overflow valve is connected with the oil tank.
Furthermore, the main circulation system further comprises a pressure flow sensor for detecting the pressure and the flow of the oil in the high-pressure oil circuit and the low-pressure oil circuit.
Compared with the prior art, the invention has the following beneficial effects.
1. According to the invention, a hydraulic transmission technology is introduced into a cutting system of the heading machine, stepless speed regulation is realized, high-pressure oil is output by driving a hydraulic pump, and then the variable motor is driven by the high-pressure oil to output the rotating speed, so that the rotating speed of the cutting head is finally matched with the optimal rock breaking rotating speed in real time, and the cutting efficiency is improved.
2. The invention saves a speed reducer and a frequency converter in the original cutting system of the development machine, reduces the weight of the cutting system, is easy to arrange the spraying system in the cutting of the development machine, avoids the sealing problem which is easy to occur in the long-distance transmission of the original spraying system in the cutting system of the development machine and is convenient for later maintenance.
3. Compared with the traditional hydraulic closed volume speed regulation loop, the invention has wider speed regulation range and improves the control precision of the cutting rotating speed.
Drawings
Fig. 1 is a schematic flow chart of a full hydraulic transmission cutting method of a boom-type excavator according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a full hydraulic transmission cutting system of a boom-type excavator according to an embodiment of the present invention.
In the figure, 1-a main circulation system, 2-an oil supplementing system, 3-an oil tank, 4-a stop valve, 5-a cutting head, 61-a first pressure sensor, 62-a second pressure sensor, 63-a pressure flow sensor, 64-a rotating speed sensor, 101-a hydraulic pump, 102-a variable motor, 103-a high-pressure oil circuit, 104-a low-pressure oil circuit, 105-a first overflow valve, 106-a first check valve, 107-a speed regulating valve, 108-a second check valve, 109-a pressure stabilizing accumulator, 201-an oil supplementing pump, 202-an oil supplementing oil circuit, 203-a second overflow valve, 204-a third overflow valve and 301-an oil returning oil circuit.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, in a first aspect, the embodiment of the present invention provides a fully hydraulic transmission cutting system of a boom-type roadheader, which includes a main circulation system 1, an oil supplementing system 2, an oil tank 3, a stop valve 4 and a cutting head 5.
In some embodiments, the primary circulation system 1 is a closed hydraulic system, and includes a hydraulic pump 101, a variable displacement motor 102, a high-pressure oil path 103, a low-pressure oil path 104, a first relief valve 105, a first check valve 106, a speed control valve 107, a first pressure sensor 61, and a second pressure sensor 62. The high-pressure oil path 103 is located between an oil outlet of the hydraulic pump 101 and an oil inlet of the variable motor 102, and the low-pressure oil path 104 is located between an oil outlet of the variable motor 102 and an oil inlet of the hydraulic pump 101. The first relief valve 105 is located between the high-pressure oil passage 103 and the low-pressure oil passage 104, the first check valve 106 and the speed regulating valve 107 are located on the high-pressure oil passage 103, and the first check valve 106 is located at the oil outlet of the hydraulic pump 101 and the speed regulating valve 107 is located at the oil inlet of the variable displacement motor 102. The first pressure sensor 61 and the second pressure sensor 62 are provided before and after the speed control valve 107, respectively, for detecting the pressure before and after the speed control valve 107.
Advantageously, a pressure flow sensor 63 is respectively disposed at an oil outlet end of the hydraulic pump 101 and an oil outlet end of the variable displacement motor 102, and is respectively used for detecting pressure and flow of oil in the high-pressure oil path 103 and the low-pressure oil path 104, and converting the pressure and flow into current signals to be transmitted to the control system, so as to realize remote monitoring of the main circulation system 1.
The oil replenishment system 2 includes an oil replenishment pump 201, an oil replenishment oil passage 202, and a second relief valve 203 and a third relief valve 204. Wherein, the oil inlet and the oil tank 3 of oil supplementing pump 201 are connected, and the oil-out is equipped with the filter for improve the cleanliness of input main circulating system 1 well fluid to and be equipped with the check valve, be arranged in preventing that the hydraulic shock in the main circulating system 1 from causing the impact damage to oil supplementing pump 201. One end of the oil supplementing oil path 202 is connected with an oil outlet of the oil supplementing pump 201, and the other end is connected with the low-pressure oil path 104. The second relief valve 203 is located between the low-pressure oil passage 104 and the oil return passage 301. Third spill valve 204 is located between oil replenishment oil passage 202 and oil return oil passage 301. The oil return passage 301 is connected to the oil tank 4. For example, the oil replenishing pump 201 adopts a variable pump structure, so that when the inlet pressure of the hydraulic pump 101 is unstable, the discharge capacity of the oil replenishing pump 201 can be properly increased to improve the oil flow rate of the input low-pressure oil passage 104, thereby avoiding the occurrence of the suction phenomenon of the hydraulic pump 101.
The stop valve 4 is located between the oil supplementing oil path 202 and the oil returning oil path 301, and when the stop valve 4 is in a communicated state, the oil supplementing oil path 202 and the low-pressure oil path 104 are directly communicated with the oil tank 3, so that the oil of the whole system can be quickly returned, and the disassembly, the assembly and the maintenance are convenient.
The hydraulic pump 101 and a driving motor thereof are placed to a body part of the heading machine, the cutting head 5 is coaxially connected with an output shaft of the variable motor 102 and is arranged in front of a cantilever section of a cutting system of the heading machine, and the variable motor 102 is connected with the hydraulic pump 101 of the body part through an oil pipeline. The output shaft of the variable displacement motor 102 is provided with a rotational speed sensor 64 for detecting the rotational speed of the drive shaft.
Advantageously, the main circulation system 1 also comprises a second non-return valve 108. The second check valve 108 is located on the low-pressure oil passage 104 between the oil outlet of the variable motor 102 and the oil replenishing oil passage 202. The second check valve 108 is used for preventing the make-up oil output by the make-up oil pump 201 from directly flowing to the variable displacement motor 102 after entering the low-pressure oil path 104, so as to prevent the influence on the normal operation of the variable displacement motor 102.
In some embodiments, the primary circulation system 1 further comprises a regulated pressure accumulator 109. The pressure-stabilizing accumulator 109 is located in the high-pressure oil passage 103 and near the oil inlet end of the first relief valve 105. Thus, when the fluctuation change of the load is large, the flow pulsation and the hydraulic impact can be absorbed and stabilized rapidly in time through the pressure stabilizing energy accumulator 109, so that the oil flowing to the variable displacement motor 102 is kept stable, and the output rotating speed of the variable displacement motor 102 can be adjusted accurately.
In some embodiments, the stop valve 4 is an electromagnetic stop valve structure, and the speed regulating valve 107 is an electro-hydraulic speed regulating valve structure. Therefore, the remote control of the hydraulic elements can be realized through the remote current control signal, so that the cutting head can be controlled quickly and accurately and controlled automatically. In the embodiment, for the EBZ220 type boom-type roadheader, the first relief valve 105 is set to 23MPa, and is used for limiting the highest pressure of the oil in the high-pressure oil path 103 and protecting the operation safety of the main circulation system 1. The second overflow valve 203 is set to be 1.8MPa and is used for draining high-temperature oil in the system into the oil tank 3 and reducing the temperature of the oil in the system. The third relief valve 204 is set to 2.5MPa, and is used for limiting the oil pressure output by the oil charge pump 201.
When the boom-type heading machine needs to cut, the oil supplementing system 2 assists the main circulating system 1 to work.
The working process of the system of the embodiment is as follows: the shutoff valve 4 is in a disconnected state, and the oil replenishment pump 201 is in a working state. Thus, a complete closed hydraulic system is formed between the high-pressure oil passage 103 and the low-pressure oil passage 104. At this time, the hydraulic pump 101 outputs high-pressure oil under the driving of the motor, the high-pressure oil flows to the variable displacement motor 102 through the high-pressure oil path 103, and during the period, the high-pressure oil sequentially passes through the first check valve 106, the voltage stabilization energy accumulator 109 and the speed regulation valve 107 to drive the variable displacement motor 102 to rotate, so as to drive the cutting head 5 to rotate to perform cutting work. An oil outlet of the variable displacement motor 102 outputs low-pressure oil, one part of the low-pressure oil flows to an oil inlet of the hydraulic pump 101 after passing through the second check valve 108, and the other part of the low-pressure oil flows to the oil tank 3 through the second overflow valve 203. The oil supply pump 201 sucks oil from the main tank 3 and supplies the oil to the low-pressure oil passage 104 through the oil supply passage 202. In this way, a part of the high-temperature oil flows back to the oil tank 3 through the second relief valve 203, and the low-temperature oil is replenished to the low-pressure oil passage 104 through the replenishment pump 201, thereby controlling the oil temperature of the main circulation system 1. In addition, the oil supplementing operation can be performed on the hydraulic pump 101 by increasing the discharge capacity of the oil supplementing pump 201 in the process, so that the phenomenon of suction of an oil inlet of the hydraulic pump 101 is avoided, and the normal work of the hydraulic pump 101 is ensured.
When the boom-type roadheader needs to overhaul the cutting system, the stop valve 4 is in a connection state, and the oil supplementing pump 201 is in a stop state. The oil in the high-pressure oil passage 103, the pressure-stabilizing energy accumulator 109 and the low-pressure oil passage 104 flows back to the oil tank 3 through the stop valve 4 and the oil return passage 301, so that the rapid oil return operation of the oil in the whole system is realized.
Referring to fig. 1 and 2, a second aspect of the embodiment of the present invention provides a full hydraulic transmission cutting method for a boom-type excavator, including the following steps:
s10, storing hydraulic oil by using an oil tank;
s20, supplementing hydraulic oil of the main circulating system by an oil supplementing system; here, the main circulation system includes a hydraulic pump 101 and a first relief valve 105; the inlet of the speed regulating valve 107 is connected with the hydraulic pump 101; a pipeline between an oil outlet of the hydraulic pump 101 and an oil inlet of the variable displacement motor is a high-pressure oil way 103; a pipeline between an oil outlet of the variable displacement motor and an oil inlet of the hydraulic pump 101 is a low-pressure oil way 104; an inlet of the first relief valve 105 is connected to the high-pressure oil passage 103, and an outlet of the first relief valve 105 is connected to the low-pressure oil passage 104. The oil supplementing system comprises an oil supplementing pump 201, a second overflow valve 203 and a third overflow valve 204; an oil inlet of the oil replenishing pump is connected with the oil tank; an inlet of the second overflow valve is connected with an oil outlet of the variable displacement motor, and an outlet of the second overflow valve is connected with an oil tank; the inlet of the third overflow valve is connected with the oil inlet of the hydraulic pump 101, and the outlet of the third overflow valve is connected with the oil tank.
S30, the main circulating system pressurizes hydraulic oil to drive the cutting head to cut, and the method specifically comprises the following steps:
s31, presetting a first pressure difference value of a speed regulating valve, wherein an outlet of the speed regulating valve is connected with an inlet of a variable motor;
s32, measuring a real-time second pressure difference value of the given speed regulating valve, wherein the second pressure difference value is equal to the difference between the inlet pressure of the speed regulating valve and the outlet pressure of the speed regulating valve; if the second differential pressure value is not equal to the first differential pressure value, the displacement of the variable displacement motor is adjusted, so that the second differential pressure value approaches and is equal to the first differential pressure value.
Here, steps S31 and S32 form a constant differential pressure control closed loop, and the first differential pressure value is set to 1.5MPa for the EBZ220 type boom roadheader in the embodiment of the present invention.
S33, presetting a first rock breaking rotating speed of the cutting head;
s34, measuring the real-time second rock breaking rotating speed of the cutting head; and if the second rock breaking rotating speed is not equal to the first rock breaking rotating speed, adjusting the opening area of the variable motor to enable the second rock breaking rotating speed to approach and be equal to the first rock breaking rotating speed.
Here, steps S33 and S34 form a closed loop of constant rotation speed control, and the first rock breaking rotation speed is an optimum rock breaking rotation speed of the cutter head in real time according to geological conditions detected by the detection device.
Through the steps of S31-S34, compared with a hydraulic closed volume speed regulation loop in the related art, the speed regulation range is wider, and the control precision of the cutting rotating speed is improved.
S40, when the cantilever type heading machine needs to be overhauled, opening a stop valve to enable hydraulic oil in the main circulation system to directly flow into an oil tank, wherein the stop valve is installed between the main circulation system and the oil tank.
Therefore, oil of the whole system can be quickly returned, and the oil return device is convenient to disassemble, assemble and maintain.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
Claims (8)
1. A full hydraulic transmission cutting method of a cantilever type heading machine is characterized by comprising the following steps:
the oil tank is used for storing hydraulic oil;
the oil supplementing system supplements hydraulic oil of the main circulating system;
the main circulating system pressurizes the hydraulic oil to drive the cutting head to cut;
when the cantilever type heading machine needs to be overhauled, the stop valve is opened to enable the hydraulic oil in the main circulation system to directly flow into the oil tank, wherein the stop valve is installed between the main circulation system and the oil tank.
2. The full hydraulic transmission cutting method of the boom-type roadheader according to claim 1, characterized in that: the main circulating system comprises a hydraulic pump and a variable motor, hydraulic oil is pressurized through the hydraulic pump, and the cutting head is driven to cut through an output shaft of the variable motor.
3. The fully hydraulic transmission cutting method of the boom-type roadheader according to claim 2, characterized in that: further comprising:
presetting a first differential pressure value of a speed regulating valve, wherein an outlet of the speed regulating valve is connected with an inlet of the variable displacement motor;
measuring a real-time second differential pressure value of the given speed regulating valve, wherein the second differential pressure value is equal to the inlet pressure of the speed regulating valve minus the outlet pressure of the speed regulating valve;
if the second differential pressure value is not equal to the first differential pressure value, the displacement of the variable displacement motor is adjusted, so that the second differential pressure value approaches and is equal to the first differential pressure value.
4. The fully hydraulic transmission cutting method of the boom-type roadheader as claimed in claim 2 or 3, characterized in that: further comprising:
presetting a first rock breaking rotating speed of a cutting head;
measuring the real-time second rock breaking rotating speed of the cutting head;
and if the second rock breaking rotating speed is not equal to the first rock breaking rotating speed, adjusting the opening area of the variable motor to enable the second rock breaking rotating speed to approach and be equal to the first rock breaking rotating speed.
5. The full hydraulic transmission cutting method of the boom-type roadheader according to claim 3, characterized in that: the main circulating system comprises a hydraulic pump and a first overflow valve; the inlet of the speed regulating valve is connected with a hydraulic pump; a pipeline between an oil outlet of the hydraulic pump and an oil inlet of the variable displacement motor is a high-pressure oil way; a pipeline between an oil outlet of the variable motor and an oil inlet of the hydraulic pump is a low-pressure oil way; the inlet of the first overflow valve is connected with the high-pressure oil way, and the outlet of the first overflow valve is connected with the low-pressure oil way.
6. The full hydraulic transmission cutting method of the boom-type roadheader according to claim 5, characterized in that: the main circulation system further comprises a pressure stabilizing energy accumulator, the pressure stabilizing energy accumulator is located in the high-pressure oil way and used for absorbing and stabilizing flow pulsation and hydraulic impact, and therefore oil of the variable displacement motor is kept stable.
7. The fully hydraulic transmission cutting method of the boom-type roadheader according to claim 2, characterized in that: the oil replenishing system comprises:
an oil inlet of the oil supplementing pump is connected with the oil tank;
an inlet of the second overflow valve is connected with an oil outlet of the variable displacement motor, and an outlet of the second overflow valve is connected with the oil tank;
and the inlet of the third overflow valve is connected with the oil inlet of the hydraulic pump, and the outlet of the third overflow valve is connected with the oil tank.
8. The full hydraulic transmission cutting method of the boom-type roadheader according to claim 5, characterized in that: the main circulation system also comprises a pressure flow sensor which is used for detecting the pressure and the flow of the oil in the high-pressure oil circuit and the low-pressure oil circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111188054.1A CN113983002A (en) | 2021-10-12 | 2021-10-12 | Full-hydraulic transmission cutting method of boom-type heading machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111188054.1A CN113983002A (en) | 2021-10-12 | 2021-10-12 | Full-hydraulic transmission cutting method of boom-type heading machine |
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| CN113983002A true CN113983002A (en) | 2022-01-28 |
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| CN202111188054.1A Pending CN113983002A (en) | 2021-10-12 | 2021-10-12 | Full-hydraulic transmission cutting method of boom-type heading machine |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201013374Y (en) * | 2006-07-26 | 2008-01-30 | 三一重型装备有限公司 | Tunneling machine cutting portion constant-power hydraulic system |
| CN202646213U (en) * | 2012-07-03 | 2013-01-02 | 湖南联智桥隧技术有限公司 | Differential pressure circuit hydraulic system |
| CN105485066A (en) * | 2016-01-31 | 2016-04-13 | 太原理工大学 | Electro-hydraulic hybrid power drive system of tunneling machine and control method |
| CN106870289A (en) * | 2017-03-28 | 2017-06-20 | 兰州理工大学 | A kind of hydrostatic storage formula hydraulic drive type wind power generating set and control method |
| CN108131248A (en) * | 2018-02-01 | 2018-06-08 | 兰州理工大学 | A kind of low wind speed activation system of hydraulic pressure wind power generator group |
-
2021
- 2021-10-12 CN CN202111188054.1A patent/CN113983002A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201013374Y (en) * | 2006-07-26 | 2008-01-30 | 三一重型装备有限公司 | Tunneling machine cutting portion constant-power hydraulic system |
| CN202646213U (en) * | 2012-07-03 | 2013-01-02 | 湖南联智桥隧技术有限公司 | Differential pressure circuit hydraulic system |
| CN105485066A (en) * | 2016-01-31 | 2016-04-13 | 太原理工大学 | Electro-hydraulic hybrid power drive system of tunneling machine and control method |
| CN106870289A (en) * | 2017-03-28 | 2017-06-20 | 兰州理工大学 | A kind of hydrostatic storage formula hydraulic drive type wind power generating set and control method |
| CN108131248A (en) * | 2018-02-01 | 2018-06-08 | 兰州理工大学 | A kind of low wind speed activation system of hydraulic pressure wind power generator group |
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