CN203050723U - Variable frequency driving shield thrust hydraulic system - Google Patents
Variable frequency driving shield thrust hydraulic system Download PDFInfo
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- CN203050723U CN203050723U CN 201220713543 CN201220713543U CN203050723U CN 203050723 U CN203050723 U CN 203050723U CN 201220713543 CN201220713543 CN 201220713543 CN 201220713543 U CN201220713543 U CN 201220713543U CN 203050723 U CN203050723 U CN 203050723U
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- oil
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- hydraulic system
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Abstract
The utility model discloses a variable frequency driving shield thrust hydraulic system. The variable frequency driving shield thrust hydraulic system comprises an oil tank, a filter, a frequency converter, a variable frequency motor, n metering pumps, n check valves, a safety valve and n thrust sub-areas with identical structures. Oil is supplied for each sub-area through respective metering pumps, and all the metering pumps for oil supply are coaxially connected together and are driven by the identical variable frequency motor. Each thrust sub-area comprises a proportional overflow valve and i identical thrust cylinder hydraulic system branch channels, and each hydraulic system branch channel comprises a three-position four-way electromagnetic directional valve, a two-position two-way electromagnetic directional valve, a safety valve, two execution check valves and a thrust cylinder. When the variable frequency driving shield thrust hydraulic system works, the thrust speed of a shield is controlled by adjusting the rotating speed of the variable frequency motor, the valve control loss of a speed control valve is avoided, and variable rotating speed control has a better energy-saving effect than variable displacement control. Different thrust sub-areas adopt different metering pumps to supply the oil, and the problem of flow coupling due to the fact that different sub-areas share an identical oil source can be solved.
Description
Technical field
The utility model relates to a kind of shield propulsion hydraulic system, relates in particular to a kind of energy-saving type shield propulsion hydraulic system based on frequency conversion drive cascade constant displacement pump.
Background technology
Shield propulsion hydraulic system is one of key subsystem of shield driving equipment, is bearing the jacking task of shield machine, relevant complex tasks such as it can be finished, and curve is advanced, correction and attitude control, thus realize that shield machine advances along setting track.Existing shield propelling system can be divided into variable pump+flow speed control valve+overflow valve pattern and variable pump+reducing valve pattern according to the propulsion cylinder control model, and this dual mode is propelling and the correction task that realizes the shield structure by the control propelling pressure.But, variable pump+flow speed control valve+overflow valve pattern has the characteristics of oil sources spill losses, variable pump+reducing valve pattern has the big characteristics of the coupling of flow between the different grouping propulsion cylinder, and two kinds of control models all adopt the empty oil sources of variable pump, therefore all has the low characteristics of efficiency.
Summary of the invention
In order to overcome the low deficiency big with advancing the by stages coupling of existing shield propulsion hydraulic system efficiency, the utility model provides a kind of frequency conversion drive shield propulsion hydraulic system, the method that this system adopts variable-frequency motor to drive the constant displacement pump fuel feeding realizes high energy efficiency, and adopts the different subregions that advance to use the method for different basis weights oil pump feed to realize advancing the by stages not have coupling.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of frequency conversion drive shield propulsion hydraulic system is characterized in that: comprise fuel tank, strainer, frequency converter, variable-frequency motor, a n constant displacement pump, a n one way valve, safety valve, the propelling subregion that a n structure is identical; The input of variable-frequency motor links to each other with frequency converter, the output of variable-frequency motor and n constant displacement pump cascade, the oil-in of n constant displacement pump is through the filter connected tank, the oil-out of n constant displacement pump is divided into two-way respectively, one the tunnel is connected with the oil-in of separately one way valve, another road propelling subregion identical with separately structure connects, and the oil-out tandem of n one way valve is in the oil-in of safety valve, the oil-out connected tank of safety valve.Described n number is all identical, and n is 3～4.
The propelling subregion that described structure is identical, include proportional pressure control valve and i the propulsion cylinder hydraulic system branch road that structure is identical, each propulsion cylinder hydraulic system branch road includes 3-position 4-way solenoid operated directional valve, 2/2-way solenoid operated directional valve, safety valve, the first execution one way valve, second execution one way valve and the propulsion cylinder; The oil-out connected tank of proportional pressure control valve, the oil-in of proportional pressure control valve is connected with the oil-in of 3-position 4-way solenoid operated directional valve in the oil-out of separately constant displacement pump and the propulsion cylinder hydraulic system branch road separately respectively, the oil recirculating port connecting tank of each 3-position 4-way solenoid operated directional valve, oil-out of each 3-position 4-way solenoid operated directional valve links to each other with the oil-in of 2/2-way solenoid operated directional valve separately, another oil-out links to each other with the rod chamber of separately propulsion cylinder, the oil-out of each 2/2-way solenoid operated directional valve links to each other with the rodless cavity of propulsion cylinder separately, the first execution one way valve of each propulsion cylinder hydraulic system branch road and second oil-in of carrying out one way valve are connected to rodless cavity and the rod chamber of the propulsion cylinder of place hydraulic system branch road, two oil-out tandems of carrying out one way valve are in the oil-in of the safety valve of place hydraulic system branch road, and the oil-out of each safety valve is connected to fuel tank after linking to each other.The i of the propulsion cylinder hydraulic system branch road that described structure is identical is 1～15.
The beneficial effects of the utility model are:
In shield structure progradation, control the fltting speed of shield structure by regulating the variable-frequency motor rotating speed, avoided the valve control loss of flow speed control valve, and the control of variable speed control phase ratio and variable-displacement has energy-saving effect better, realized high energy efficiency; The different subregions that advance adopt different constant displacement pump fuel feeding, can solve different subregions and share the flow coupled problem that same oil sources causes.
Description of drawings
Fig. 1 is hydraulic system principle figure of the present utility model.
Among the figure: 1, fuel tank, 2, strainer, 3, frequency converter, 4, variable-frequency motor, 5, constant displacement pump, 6, one way valve, 7, safety valve, 8, proportional pressure control valve, 9, the 3-position 4-way solenoid operated directional valve, 10, the 2/2-way solenoid operated directional valve, 11, safety valve, 12, first carry out one way valve, 13, second carries out one way valve, and 14, propulsion cylinder.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
The utility model comprises fuel tank 1, strainer 2, frequency converter 3, variable-frequency motor 4, a n constant displacement pump 5, a n one way valve 6, safety valve 7, the propelling subregion that a n structure is identical; The input of variable-frequency motor 4 links to each other with frequency converter 3,5 cascades of the output of variable-frequency motor 4 an and n constant displacement pump, the oil-in of n constant displacement pump 5 is through filter 2 connected tanks 1, the oil-out of n constant displacement pump 5 is divided into two-way respectively, one the tunnel is connected with the oil-in of separately one way valve 6, another road propelling subregion identical with separately structure connects, and the oil-out tandem of n oil feed non-return valve 6 is in the oil-in of safety valve 7, the oil-out connected tank 1 of safety valve 7.Described n number is all identical, and n is 3～4.
The propelling subregion that described structure is identical, include proportional pressure control valve 8 and i the propulsion cylinder hydraulic system branch road that structure is identical, each propulsion cylinder hydraulic system branch road includes 3-position 4-way solenoid operated directional valve 9,2/2-way solenoid operated directional valve 10, safety valve 11, the first execution one way valve 12, second execution one way valve 13 and the propulsion cylinder 14; The oil-out connected tank 1 of proportional pressure control valve 8, the oil-in of proportional pressure control valve 8 is connected with the oil-in of 3-position 4-way solenoid operated directional valve 9 in the oil-out of separately constant displacement pump 5 and the propulsion cylinder hydraulic system branch road separately respectively, the oil recirculating port connecting tank 1 of each 3-position 4-way solenoid operated directional valve 9, oil-out of each 3-position 4-way solenoid operated directional valve 9 links to each other with the oil-in of 2/2-way solenoid operated directional valve 10 separately, another oil-out links to each other with the rod chamber of separately propulsion cylinder 14, the oil-out of each 2/2-way solenoid operated directional valve 10 links to each other with the rodless cavity of propulsion cylinder separately 14, the first execution one way valve 12 of each propulsion cylinder hydraulic system branch road and second oil-in of carrying out one way valve 13 are connected to rodless cavity and the rod chamber of the propulsion cylinder 14 of place hydraulic system branch road, two oil-out tandems of carrying out one way valve are in the oil-in of the safety valve 11 of place hydraulic system branch road, and the oil-out of each safety valve 11 is connected to fuel tank 1 after linking to each other.The i of the propulsion cylinder hydraulic system branch road that described structure is identical is 1～15.
Operating principle of the present utility model is as follows:
Motor-driven n constant displacement pump 5 rotates, and from fuel tank 1 oil suction, the pressure oil of each constant displacement pump 5 output enters the oil-in of one way valve 6 separately and propelling subregion separately to the inlet port of each constant displacement pump 5 through filter 2.By regulating the rotating speed of variable-frequency motor, can realize the control of the maximum fltting speed of shield structure and the adjusting of propulsion cylinder rewind down speed.
In the shield structure progradation, the propelling subregion that each structure is identical has identical operating principle: pressure oil enters the oil-in of proportional pressure control valve 8 and the oil-in of each 3-position 4-way solenoid operated directional valve 9, each 3-position 4-way solenoid operated directional valve 9 right position, and provide pressure oil by the 9A oil-out to the oil-in of separately 2/2-way solenoid operated directional valve 10, each 2/2-way solenoid operated directional valve 10 electric and to the rodless cavity of separately propulsion cylinder 14 and the oil-in fuel feeding of the first execution one way valve 12 separately, each propulsion cylinder 14 is pushed ahead under the effect of hydraulic oil and rod chamber side hydraulic oil is transported to separately the second 9B oil-out of carrying out the oil-in of one way valve 13 and separately 3-position 4-way solenoid operated directional valve 9, each 3-position 4-way solenoid operated directional valve 9 by oil return opening to fuel tank 1 oil return.By the adjusting to each proportional pressure control valve 8, can realize each is advanced the control of the system pressure of subregion.
In the shield structure propulsion cylinder rewind down process, each propelling subregion that contains the propulsion cylinder that needs rollback has identical operating principle: pressure oil enters the oil-in of proportional pressure control valve 8 and the oil-in of each 3-position 4-way solenoid operated directional valve 9, each needs the position, 3-position 4-way solenoid operated directional valve 9 left side of the propulsion cylinder of rollback to get, and by the 9B oil-out to the rod chamber of separately propulsion cylinder 14 and the second oil-in fuel feeding of holding one way valve 13 separately, each propulsion cylinder 14 that needs rollback contracts next time in the effect of hydraulic oil rodless cavity side hydraulic oil is transported to separately first oil-out of carrying out the oil-in of one way valve 12 and separately 2/2-way solenoid operated directional valve 10, each needs the 2/2-way solenoid operated directional valve 10 of the propulsion cylinder of rollback to get, and by oil-in hydraulic oil is transported to the 9A oil-out of 3-position 4-way solenoid operated directional valve 9 separately, each 3-position 4-way solenoid operated directional valve 9 of propulsion cylinder that needs rollback by oil return opening to fuel tank 1 oil return; Each does not need about 9 of the 3-position 4-way solenoid operated directional valves of the propulsion cylinder of rollback all must not electricity, and its 2/2-way solenoid operated directional valve 10 separately all must not.By the adjusting to each proportional pressure control valve 8, can realize each is advanced the control of the system pressure of subregion.
In the shield structure propulsion cylinder rewind down process, each propelling subregion that does not contain the propulsion cylinder that needs rollback has identical operating principle: pressure oil enters the oil-in of proportional pressure control valve 8 and the oil-in of each 3-position 4-way solenoid operated directional valve 9, about 9 of each 3-position 4-way solenoid operated directional valves all must not, and its 2/2-way solenoid operated directional valve 10 separately all must not, the setting pressure of proportional pressure control valve 8 is zero, proportional pressure control valve 8 by oil return opening to fuel tank 1 oil return.
Claims (4)
1. frequency conversion drive shield propulsion hydraulic system is characterized in that: comprise fuel tank (1), strainer (2), frequency converter (3), variable-frequency motor (4), a n constant displacement pump (5), a n one way valve (6), safety valve (7), the propelling subregion that a n structure is identical; The input of variable-frequency motor (4) links to each other with frequency converter (3), the output of variable-frequency motor (4) and n constant displacement pump (5) cascade, the oil-in of n constant displacement pump (5) is through filter (2) connected tank (1), the oil-out of n constant displacement pump (5) is divided into two-way respectively, one the tunnel is connected with the oil-in of separately one way valve (6), another road propelling subregion identical with separately structure connects, the oil-out tandem of n one way valve (6) is in the oil-in of safety valve (7), the oil-out connected tank (1) of safety valve (7).
2. a kind of frequency conversion drive shield propulsion hydraulic system according to claim 1, it is characterized in that: the propelling subregion that described structure is identical, include proportional pressure control valve (8) and i the propulsion cylinder hydraulic system branch road that structure is identical, each propulsion cylinder hydraulic system branch road includes 3-position 4-way solenoid operated directional valve (9), 2/2-way solenoid operated directional valve (10), safety valve (11), the first execution one way valve (12), second execution one way valve (13) and the propulsion cylinder (14); The oil-out connected tank (1) of proportional pressure control valve (8), the oil-in of proportional pressure control valve (8) is connected with the oil-in of 3-position 4-way solenoid operated directional valve (9) in the oil-out of separately constant displacement pump (5) and the propulsion cylinder hydraulic system branch road separately respectively, the oil recirculating port connecting tank (1) of each 3-position 4-way solenoid operated directional valve (9), oil-out of each 3-position 4-way solenoid operated directional valve (9) links to each other with the oil-in of 2/2-way solenoid operated directional valve (10) separately, another oil-out links to each other with the rod chamber of separately propulsion cylinder (14), the oil-out of each 2/2-way solenoid operated directional valve (10) links to each other with the rodless cavity of separately propulsion cylinder (14), the first execution one way valve (12) and the oil-in of the second execution one way valve (13) of each propulsion cylinder hydraulic system branch road is connected to rodless cavity and the rod chamber of the propulsion cylinder (14) of place hydraulic system branch road, two oil-out tandems of carrying out one way valve are in the oil-in of the safety valve (11) of place hydraulic system branch road, and the oil-out of each safety valve (11) is connected to fuel tank (1) after linking to each other.
3. a kind of frequency conversion drive shield propulsion hydraulic system according to claim 1, it is characterized in that: described n number is all identical, and n is 3～4.
4. a kind of frequency conversion drive shield propulsion hydraulic system according to claim 1, it is characterized in that: the i of the propulsion cylinder hydraulic system branch road that described structure is identical is 1～15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220713543 CN203050723U (en) | 2012-12-21 | 2012-12-21 | Variable frequency driving shield thrust hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220713543 CN203050723U (en) | 2012-12-21 | 2012-12-21 | Variable frequency driving shield thrust hydraulic system |
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| CN203050723U true CN203050723U (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220713543 Withdrawn - After Issue CN203050723U (en) | 2012-12-21 | 2012-12-21 | Variable frequency driving shield thrust hydraulic system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016017A (en) * | 2012-12-21 | 2013-04-03 | 浙江大学 | Variable frequency drive shield thrust hydraulic system |
| CN104196785A (en) * | 2014-07-22 | 2014-12-10 | 西安交通大学 | Closed type energy-saving type shielding propelling hydraulic system adopting multi-union-pump driving |
| CN104261067A (en) * | 2014-09-20 | 2015-01-07 | 辽宁三三工业有限公司 | Driving mechanism of shield machine screw conveyor |
| CN104895855A (en) * | 2014-03-03 | 2015-09-09 | 卡特彼勒（青州）有限公司 | Hydraulic system for machine, machine and control method of hydraulic system |
| CN110500100A (en) * | 2019-08-31 | 2019-11-26 | 盾构及掘进技术国家重点实验室 | A kind of electrohydraulic control system promoting load automatic adjusument for shield machine |
-
2012
- 2012-12-21 CN CN 201220713543 patent/CN203050723U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016017A (en) * | 2012-12-21 | 2013-04-03 | 浙江大学 | Variable frequency drive shield thrust hydraulic system |
| CN104895855A (en) * | 2014-03-03 | 2015-09-09 | 卡特彼勒（青州）有限公司 | Hydraulic system for machine, machine and control method of hydraulic system |
| CN104895855B (en) * | 2014-03-03 | 2018-05-01 | 卡特彼勒（青州）有限公司 | For the hydraulic system of machine, machine and hydraulic system control method |
| CN104196785A (en) * | 2014-07-22 | 2014-12-10 | 西安交通大学 | Closed type energy-saving type shielding propelling hydraulic system adopting multi-union-pump driving |
| CN104261067A (en) * | 2014-09-20 | 2015-01-07 | 辽宁三三工业有限公司 | Driving mechanism of shield machine screw conveyor |
| CN110500100A (en) * | 2019-08-31 | 2019-11-26 | 盾构及掘进技术国家重点实验室 | A kind of electrohydraulic control system promoting load automatic adjusument for shield machine |
| CN110500100B (en) * | 2019-08-31 | 2020-11-17 | 盾构及掘进技术国家重点实验室 | Electro-hydraulic control system for self-adaptive adjustment of propelling load of shield tunneling machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130710 Effective date of abandoning: 20140813 |
|
| RGAV | Abandon patent right to avoid regrant |