CN209586823U - A kind of shield excavation machine hydraulic propelling system - Google Patents
A kind of shield excavation machine hydraulic propelling system Download PDFInfo
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- CN209586823U CN209586823U CN201822071388.0U CN201822071388U CN209586823U CN 209586823 U CN209586823 U CN 209586823U CN 201822071388 U CN201822071388 U CN 201822071388U CN 209586823 U CN209586823 U CN 209586823U
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Abstract
A kind of shield excavation machine hydraulic propelling system is mainly made of several subregion propulsion systems, each subregion propulsion system includes the identical hydraulic circuit of several structures, each hydraulic circuit is by servo motor, constant displacement pump, hydraulic cylinder, the composition such as safety valve and check valve, hydraulic circuit directly drives the speed control system with adjustable displacement of advancing hydraulic pressure oil cylinder using servo motor and constant displacement pump, not only energy loss is small, obvious energy conservation, each hydraulic circuit is mutually indepedent, hydraulic cylinder both can independent control, energy coordinated control again, increase the flexibility of system control, by designing control circuit, it is easily achieved simultaneously advancing for hydraulic cylinder；And it can be according to texture stratum variation control hydraulic cylinder working quantity during tunneling construction, when encountering hard rock stratum, multiple hydraulic cylinders are worked at the same time, when encountering soft soil layer, the hydraulic cylinder quantity worked at the same time can be reduced, to reduce the energy consumption of hydraulic system.
Description
Technical field
The utility model relates to a kind of shield excavation machine hydraulic propelling systems, belong to hydraulic transmission technology field.
Background technique
Shield excavation machine be it is a kind of be exclusively used in underground tunnel project construction integrate the technologies such as mechanical, electrical, liquid, be a kind of
The typical integrated equipment of multisystem complexity mechanical electronic hydraulic, can be realized mechanization, the automation of tunnel excavation.The liquid of shield excavation machine
Pressure propulsion system provides motive force for shield advance, usually by completing along the circumferentially distributed certain amount hydraulic cylinder of shield,
Ask propulsion system to be not only able to achieve the propulsion of multi-cylinder precise synchronization, and each grouping hydraulic cylinder can be controlled separately with meet curve driving,
Independent rollback when correction and pipe sheet assembling etc. requires, while the pressure of propulsion system and flow must be real-time continuous adjustable, really
Reasonable propulsive force and speed are protected, tunneling process earth pressure balance is maintained.
Shield driving is a kind of typical high-power, heavy load operating condition, and the installed power of propulsion system is very big, and energy consumption is very
It is high.Existing propulsion hydraulic system uses valve control mode, and not only restriction loss is big, but also off-energy becomes thermal energy and makes to tunnel operating condition
Deteriorate.Simultaneously as the load that different location is born on shield section is different (especially in correction and curve driving)
Pressure oil needed for causing each hydraulic cylinder that must obtain from oil sources respectively, and oil sources makes always with maximum pressure to system fuel feeding
It obtains and produces very big energy loss between the lower hydraulic cylinder of operating pressure and oil sources, ultimately cause system whole efficiency drop
It is low, it not only wastes energy, affect equipment life, but also be degrading construction environment, bring many unfavorable factors.In addition, pick
Into texture stratum in work progress and its property complicated and changeable of Water And Earth Pressures, when encountering hard rock stratum, it is desirable that propulsive force is big, needs
Multiple hydraulic cylinders are wanted to work at the same time；When encountering soft soil layer, it is desirable that propulsive force is small, can reduce the hydraulic cylinder number worked at the same time
Amount, to reduce the energy consumption of hydraulic system.Therefore, how ensure propulsion system correctly efficiently complete driving task feelings
Under condition, realize that the Energy Saving Control of hydraulic propelling system is a key technical problem in shield driving.
Summary of the invention
The purpose of the utility model is to overcome take into account the problem of shield excavation machine progradation in background technique
Meet shield excavation machine construction requirement, a kind of use using the direct drive type volume speed regulation of servo motor and constant displacement pump driving is provided
Energy-saving type shield propulsion hydraulic system, the hydraulic system structure is simple, is easily installed, and system energy loss can be greatly reduced, non-
Often suitable shield excavation machine propulsion system control.
The technical scheme in the invention for solving the technical problem:
A kind of shield excavation machine hydraulic propelling system includes several subregion propulsion systems, if each subregion propulsion system includes
The dry identical hydraulic circuit of structure, each hydraulic circuit are independent hydraulic circuit, and each hydraulic circuit includes servo electricity
Machine, constant displacement pump, the first check valve, second one-way valve, hydraulic cylinder, safety valve, third check valve, the 4th check valve, fuel tank etc.；
The output shaft of servo motor and the input shaft rigid attachment of constant displacement pump, the left end hydraulic fluid port of constant displacement pump by pipeline respectively with hydraulic oil
The oil outlet of the rodless cavity of cylinder, the oil inlet of second one-way valve and the first check valve is connected, constant displacement pump right end hydraulic fluid port respectively with liquid
The oil outlet of the rod chamber of compressing cylinder, the oil inlet of third check valve and the 4th check valve is connected；The oil outlet of second one-way valve
It is connected with the oil inlet of safety valve；The oil inlet with the oil outlet of third check valve, the first check valve respectively of the oil outlet of safety valve
Mouth, the oil inlet of the 4th check valve and fuel tank are connected；Each hydraulic circuit directly drives propulsion liquid using servo motor and constant displacement pump
The speed control system with adjustable displacement of compressing cylinder.
A kind of shield excavation machine hydraulic propelling system is provided with four subregions.
Compared with prior art, generated beneficial effect is the utility model:
Hydraulic circuit inside each subregion of propulsion system and each subregion is mutually indepedent, and therefore, propulsion system hydraulic cylinder was both
Can independent control, and can coordinated control, increase system control flexibility；Each hydraulic circuit uses servo motor and constant displacement pump
The speed control system with adjustable displacement of advancing hydraulic pressure oil cylinder is directly driven, not only energy loss is small, obvious energy conservation, and passes through design control electricity
Road, it is easy to accomplish hydraulic cylinder simultaneously advances；It can be according to texture stratum variation control hydraulic cylinder work during tunneling construction
Make quantity, when encountering hard rock stratum, multiple hydraulic cylinders are worked at the same time, and when encountering soft soil layer, can be reduced and be worked at the same time
Hydraulic cylinder quantity, to reduce the energy consumption of hydraulic system.
Detailed description of the invention
Fig. 1 is single area's schematic diagram of shield excavation machine propulsion system.
Fig. 2 is shield excavation machine propulsion system hydraulic cylinder subregion schematic diagram.
In figure: 1. servo motors, 2. constant displacement pumps, 3. first check valves, 4. second one-way valves, 5. hydraulic cylinders, 6. safety
Valve, 7. third check valves, 8. the 4th check valves, 9. fuel tanks.
Specific embodiment
With reference to the accompanying drawing 1 and embodiment the present invention will be further described.
As shown in Figure 1, the utility model includes several subregion propulsion systems, each subregion propulsion system includes several knots
The identical hydraulic circuit of structure, each hydraulic circuit is mutually indepedent, and each hydraulic circuit includes servo motor 1, the 2, first list of constant displacement pump
To valve 3, second one-way valve 4, hydraulic cylinder 5, safety valve 6, third check valve 7, the 4th check valve 8 etc.；The output of servo motor 1
The input shaft rigid attachment of axis and constant displacement pump 2, the left end hydraulic fluid port of constant displacement pump 2 by pipeline respectively with the rodless cavity of hydraulic cylinder 5,
The oil outlet of the oil inlet of second one-way valve 4 and the first check valve 3 be connected, the right end hydraulic fluid port of constant displacement pump 2 respectively with hydraulic cylinder 5
Rod chamber, third check valve 7 oil inlet and the 4th check valve 8 oil outlet be connected；The oil outlet and peace of second one-way valve 4
The oil inlet of full valve 6 is connected；The oil inlet with the oil outlet of third check valve 7, the first check valve 3 respectively of the oil outlet of safety valve 6
Mouth, the oil inlet of the 4th check valve 8 and fuel tank 9 are connected.
As shown in Fig. 2, the present embodiment is provided with tetra- subregion propulsion systems of A, B, C, D, and 16 are arranged altogether in circumferencial direction
A hydraulic cylinder, wherein 3, the area A hydraulic cylinder, 4, the area B hydraulic cylinder, 5, the area C hydraulic cylinder, 4, the area D hydraulic cylinder.
The working principle of the utility model is as follows:
Illustrate that its working principle, other each subregion working principles are similar by taking the area A as an example.
When shield excavation machine is pushed ahead, the servo motor 1 of each subregion propulsion system must be electrically activated, and drive constant displacement pump 2
It rotates forward, constant displacement pump 2 is by rod chamber oil suction of the oil pipe from hydraulic cylinder 5, and after pressurization, the pressure oil that constant displacement pump 2 exports is logical
The rodless cavity that oil pipe enters hydraulic cylinder 5 is crossed, since 5 rod chamber hydraulic oil of hydraulic cylinder is reduced, in the work of rodless cavity high pressure oil
It is stretched out to the right with lower piston rod.At this point, the 4th check valve 8 is opened, the hydraulic oil in fuel tank 9 flow to quantitative through the 4th check valve 8
Pump 2 carries out repairing.The oil inlet of first check valve 3 is connect with fuel tank, the high pressure that the left end hydraulic fluid port of oil outlet and constant displacement pump 2 exports
Oil connection, valve port are not opened, oil-free liquid stream mistake.At this point, second one-way valve 4 is opened, the high pressure oil of 2 left end hydraulic fluid port of constant displacement pump output
A part flow to the oil inlet of safety valve 6 through second one-way valve 4.The oil inlet of third check valve 7 and the right end hydraulic fluid port of constant displacement pump 2
Connection is in low-pressure state, and oil outlet is connect with fuel tank, and valve port is not opened, oil-free liquid stream mistake.In the case of normal propulsion, shield
Development machine propulsion hydraulic system operating pressure is no more than the pressure value that safety valve 6 is set, and safety valve 6 is not turned on；Work as shield driving
When occurring abnormal conditions in machine progradation causes system pressure to be higher than 6 setup pressure value of safety valve, safety valve 6 is opened, quantitative
The oil liquid for pumping the outflow of 2 left end hydraulic fluid ports flows back to fuel tank 9 through safety valve 6, realizes off-load.
During shield excavation machine tunneling construction, when encountering hard rock-soil layer, it is desirable that propulsive force is big, can to multiple or
Whole servo motors are powered simultaneously, work at the same time to control multiple or whole hydraulic cylinders；When encountering soft rock-soil layer, it is desirable that
Propulsive force is small, can reduce the quantity of the servo motor and hydraulic cylinder that work at the same time, so that the energy consumption of hydraulic system is reduced,
It realizes energy-saving.
Since each subregion propulsion system hydraulic circuit uses Serve Motor Control, by designing control circuit, it is easy to accomplish
Propulsion system hydraulic cylinder simultaneously advances.
In shield excavation machine progradation, each hydraulic circuit servo motor 1 of separately adjustable each subregion need to be only synchronized
The flow of constant displacement pump just can be changed in input current size, so that shield pick can be realized in the fltting speed for controlling local area hydraulic cylinder
Into machine turning or pose adjustment.
When advancing hydraulic pressure oil cylinder retracts, servo motor 1 is reversely rotated, and driving constant displacement pump 2 rotates backward, and constant displacement pump 2 is logical
Oil pipe oil suction from 5 rodless cavity of hydraulic cylinder is crossed, the rod chamber of hydraulic cylinder 5 is delivered to after being pressurized.Due to hydraulic cylinder 5
Rodless cavity hydraulic oil is being reduced, and piston rod retracts under the action of rod chamber high pressure oil.Due to 5 rod chamber of hydraulic cylinder and no bar
Chamber work area is not of uniform size, and third check valve 7 is opened at this time, and high pressure oil a part of 2 right end hydraulic fluid port of constant displacement pump outflow is extremely
5 rod chamber of hydraulic cylinder, redundance flow back to fuel tank 9 from third check valve 7.At this point, second one-way valve 4 is in oil suction low pressure shape
State, valve port are not opened, oil-free liquid stream mistake.First check valve, 3 oil inlet is connect with fuel tank 9, oil outlet and 2 left end hydraulic fluid port of constant displacement pump
Connection, valve port are not opened, oil-free liquid stream mistake.4th check valve, 8 oil outlet and the high pressure oil of 2 right end hydraulic fluid port of constant displacement pump output connect
It connects, oil inlet is connect with fuel tank, and valve port is not opened, oil-free liquid stream mistake.
When each subregion advancing hydraulic pressure oil cylinder need to individually retract, separately adjustable each hydraulic circuit servo motor 1 is only needed to input
The size of electric current, the input current for the servo motor corresponding to hydraulic cylinder that do not retract, which is set as zero, can be realized.
When shield excavation machine propulsion system stops working, zero is set by 1 input current of servo motor, constant displacement pump 2 is defeated
Outflow is zero, hydraulic cylinder stop motion.Further, since 3 oil outlet of the first check valve is connected with 5 rodless cavity of hydraulic cylinder,
Oil inlet connects fuel tank 9, reversed to end, and second one-way valve 4 is connect with safety valve 6, and safety valve 6 is not turned on, propelling hydraulic cylinder
Piston rod will not retract under outer load effect.
The utility model is without restriction loss using the direct drive type volume speed-regulating system of hydraulic pump control hydraulic cylinder
System obvious energy conservation；Each subregion propulsion system hydraulic circuit provides oil sources power using independent hydraulic pump, big with small displacement pump substitution
Displacement pump, system are more energy saving.
Claims (1)
1. a kind of shield excavation machine hydraulic propelling system, including several subregion propulsion systems, if each subregion propulsion system includes
The dry identical hydraulic circuit of structure, each hydraulic circuit are independent hydraulic circuit, and each hydraulic circuit includes servo electricity
Machine (1), constant displacement pump (2), the first check valve (3), second one-way valve (4), hydraulic cylinder (5), safety valve (6), third check valve
(7), the 4th check valve (8), fuel tank (9)；It is characterized by: the output shaft of servo motor (1) and the input shaft of constant displacement pump (2) are rigid
Property connection, the left end hydraulic fluid port of constant displacement pump (2) by pipeline respectively with the rodless cavity of hydraulic cylinder (5), second one-way valve (4) into
The oil outlet of hydraulic fluid port and the first check valve (3) is connected, constant displacement pump (2) right end hydraulic fluid port respectively with the rod chamber of hydraulic cylinder (5), the
The oil outlet of the oil inlet of three check valves (7) and the 4th check valve (8) is connected；The oil outlet and safety valve of second one-way valve (4)
(6) oil inlet is connected；The oil outlet of safety valve (6) respectively with the oil outlet of third check valve (7), the first check valve (3)
Oil inlet, the oil inlet of the 4th check valve (8) and fuel tank (9) are connected；Each hydraulic circuit is direct using servo motor and constant displacement pump
Drive the speed control system with adjustable displacement of advancing hydraulic pressure oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822071388.0U CN209586823U (en) | 2018-12-11 | 2018-12-11 | A kind of shield excavation machine hydraulic propelling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822071388.0U CN209586823U (en) | 2018-12-11 | 2018-12-11 | A kind of shield excavation machine hydraulic propelling system |
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| CN209586823U true CN209586823U (en) | 2019-11-05 |
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| CN201822071388.0U Active CN209586823U (en) | 2018-12-11 | 2018-12-11 | A kind of shield excavation machine hydraulic propelling system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519427A (en) * | 2018-12-11 | 2019-03-26 | 山东交通学院 | A kind of shield excavation machine hydraulic propelling system |
| CN111456747A (en) * | 2020-04-30 | 2020-07-28 | 中铁工程装备集团有限公司 | Ultra-short continuous propelling type tunneling machine and continuous tunneling method |
| CN113566011A (en) * | 2021-07-07 | 2021-10-29 | 大连理工大学 | Four-module linkage flow distribution type electromagnetic direct drive pump |
-
2018
- 2018-12-11 CN CN201822071388.0U patent/CN209586823U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519427A (en) * | 2018-12-11 | 2019-03-26 | 山东交通学院 | A kind of shield excavation machine hydraulic propelling system |
| CN111456747A (en) * | 2020-04-30 | 2020-07-28 | 中铁工程装备集团有限公司 | Ultra-short continuous propelling type tunneling machine and continuous tunneling method |
| CN111456747B (en) * | 2020-04-30 | 2021-11-26 | 中铁工程装备集团有限公司 | Ultra-short continuous propelling type tunneling machine and continuous tunneling method |
| CN113566011A (en) * | 2021-07-07 | 2021-10-29 | 大连理工大学 | Four-module linkage flow distribution type electromagnetic direct drive pump |
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