CN104196779A - High-low speed switching hydraulic motor control device - Google Patents
High-low speed switching hydraulic motor control device Download PDFInfo
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- CN104196779A CN104196779A CN201410397188.8A CN201410397188A CN104196779A CN 104196779 A CN104196779 A CN 104196779A CN 201410397188 A CN201410397188 A CN 201410397188A CN 104196779 A CN104196779 A CN 104196779A
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Abstract
The invention belongs to the technical field of a middle ladle trolley walking control device in continuous casting steel and particularly relates to a high-low speed switching hydraulic motor control device which comprises a hydraulic motor, a brake and a hydraulic station. A low-speed control loop is connected with an oil supply control loop and a high-speed control loop respectively. The high-speed control loop is connected with the oil supply control loop and the hydraulic motor respectively. A brake loop is connected with the oil supply control loop and the brake respectively. The device has the advantages that the structure is simple, using reliability is high, system safety is obvious, maintaining is convenient, an electric control mode is simple, middle ladle walking can be controlled quickly, time for a middle ladle trolley to moving from preheating position to a casting position can be saved, meanwhile, when accidents happen to casting, the middle ladle can leave a casting position quickly, middle ladle trolley equipment is protected from being burned down by molten steel, the safety of equipment and personnel is guaranteed, and safety production accidents are avoided.
Description
Technical field
The invention belongs to the tundish car traveling control device technical field in continuous casting steel machine, be specifically related to a kind of high low speed and switch oil hydraulic motor control gear.
Background technique
Tundish car is the visual plant that plays support, delivery in continuous casting technique, changes the effects such as tundish, in whole process, need to control tundish car.At present, the driving mode of the domestic and international tundish car traveling control device for continuous casting steel machine mainly contains two kinds, comprises that motor drives and fluid motor-driven, and in use, both respectively exist certain problem, specific as follows:
1, the tundish car traveller that adopts motor to drive through speed reducer: because the tundish car speed of travel need to be adjusted, so what drive motor adopted is frequency changer, the cost of frequency changer is higher, be not easy to control, maintenance difficult, installing space is large, and motor and speed reducer mechanism complexity.
2, the tundish car traveller that adopts oil hydraulic motor to drive: the tundish car speed of travel is controlled by Proportional valve or servovalve, electrical control complexity, cost is high, rate of fault is high, and Proportional valve or servovalve require higher to oil cleanliness, for adapting to the requirement of high cleanliness, hydraulic system is more complicated.
Summary of the invention
The object of the invention is to overcome the defect that existing tundish car traveling control device in use exists.
For this reason, the invention provides a kind of high low speed and switch oil hydraulic motor control gear, comprise oil hydraulic motor, break, hydraulic station, also comprise fuel feeding control loop, low speed control loop, high speed control loop and break loop;
Described hydraulic station is connected with fuel feeding control loop;
Described low speed control loop is connected with fuel feeding control loop, high speed control loop respectively; Described high speed control loop is connected with fuel feeding control loop and oil hydraulic motor respectively; Described break loop is connected with fuel feeding control loop and break respectively.
Also comprise the 4th high-pressure ball valve and P6 hydraulic fluid port that two communicates and P7 hydraulic fluid port, one-way valve and T6 hydraulic fluid port that two communicates and T7 hydraulic fluid port, power oil sources P0 and oil return T0 from hydraulic station;
Described fuel feeding control loop and P6 hydraulic fluid port join, and described P7 hydraulic fluid port is connected with the power oil sources P0 from hydraulic station, and described fuel feeding control loop and T6 hydraulic fluid port join, and described T7 hydraulic fluid port is connected with the oil return T0 from hydraulic station;
In described fuel feeding control loop, be provided with Pilot operated check valve and the second two solenoid directional control valves, the second two A1 hydraulic fluid ports of solenoid directional control valve and the X hydraulic fluid port of Pilot operated check valve are connected;
In described low speed control loop, be provided with the second three-position electromagnetic selector valve, the second hydraulic lock, the 3rd single-direction and dual-direction throttle valve, the A2 hydraulic fluid port of described the second three-position electromagnetic selector valve is connected with the A9 hydraulic fluid port in low speed control loop by the second hydraulic lock, the 3rd single-direction and dual-direction throttle valve; The B2 hydraulic fluid port of described the second three-position electromagnetic selector valve passes through in the second hydraulic lock, the 3rd single-direction and dual-direction throttle valve and low speed control loop
b9hydraulic fluid port connects;
In described high speed control loop, be provided with the first three-position electromagnetic selector valve, the second single-direction and dual-direction throttle valve, pilot operated directional control valve, the first hydraulic lock, the first single-direction and dual-direction throttle valve, the first relief valve and the second relief valve;
The A3 hydraulic fluid port of described the first three-position electromagnetic selector valve is connected with the aX hydraulic fluid port of pilot operated directional control valve by the second single-direction and dual-direction throttle valve; The B3 hydraulic fluid port of the first three-position electromagnetic selector valve is connected with the bY hydraulic fluid port of pilot operated directional control valve by the second single-direction and dual-direction throttle valve;
The A5 hydraulic fluid port of described pilot operated directional control valve is connected with the A10 hydraulic fluid port in high speed control loop by the first hydraulic lock, the first single-direction and dual-direction throttle valve respectively; The B5 hydraulic fluid port of the pilot operated directional control valve in high speed control loop is connected with the B10 hydraulic fluid port in high speed control loop by the first hydraulic lock, the first single-direction and dual-direction throttle valve respectively; A10 hydraulic fluid port is connected with B10 hydraulic fluid port by the first relief valve; B10 hydraulic fluid port is connected with A10 hydraulic fluid port by the second relief valve;
In described break loop, be provided with the first two solenoid directional control valves and one-way throttle valves, the A4 hydraulic fluid port of described the first two solenoid directional control valves is connected with the X2 hydraulic fluid port in break loop by one-way throttle valve.
The P2 hydraulic fluid port of the second three-position electromagnetic selector valve in described low speed control loop is connected with the A6 hydraulic fluid port of the one-way valve in fuel feeding control loop, and the T2 hydraulic fluid port of the second three-position electromagnetic selector valve is connected with the T6 hydraulic fluid port of one-way valve; A9 hydraulic fluid port is connected with the A11 hydraulic fluid port in high speed control loop, and B9 hydraulic fluid port is connected with the B11 hydraulic fluid port in high speed control loop.
The P3 hydraulic fluid port of the first three-position electromagnetic selector valve in described high speed control loop is connected with the A6 hydraulic fluid port of the one-way valve in fuel feeding control loop, and the T3 hydraulic fluid port of the first three-position electromagnetic selector valve is connected with the T6 hydraulic fluid port of one-way valve; A10 hydraulic fluid port is connected with the A8 hydraulic fluid port of oil hydraulic motor by the first high-pressure ball valve, the first high-pressure rubber pipe respectively, and B10 hydraulic fluid port is connected with the B8 hydraulic fluid port of oil hydraulic motor by the second high-pressure ball valve, the second high-pressure rubber pipe respectively.
The P4 hydraulic fluid port of the first two solenoid directional control valves in described break control loop is connected with the A6 hydraulic fluid port of the one-way valve in fuel feeding control loop, and the first two T4 hydraulic fluid ports of solenoid directional control valve and the T6 hydraulic fluid port of one-way valve are connected; X2 hydraulic fluid port is connected with the X1 hydraulic fluid port of break by third high pressure ball valve, third high moulding pipe respectively.
Beneficial effect of the present invention: this high low speed provided by the invention switches oil hydraulic motor control gear, comprise fuel feeding control loop, low speed control loop, high speed control loop and break loop, by fuel feeding control loop, operator are cutoff high oil sources easily, make tundish car can rest on reliably the position of technological requirement, prevent that misoperation and hydrovalve fault from causing tundish walking out-of-control phenomenon; By low speed control loop, operator can control the low speed walking performance of tundish car easily, particularly can avoid the impact phenomenon occurring in the time that tundish car starts and stops; By high speed control loop, operator can control the walking of tundish fast, save tundish car moves to pouring position time from preheating position, simultaneously in the time there is accident in cast, tundish can be fled from pouring position fast, protection tundish car equipment is not burnt by molten steel, and guarantee equipment and personnel's safety, avoids occurring industrial accident; Simple in structure, operational safety is high, and security of system is outstanding, is convenient to safeguard, electric controling mode is simple.
Below with reference to accompanying drawing, the present invention is described in further details.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Description of reference numerals: 1, oil hydraulic motor; 2, break; 301, the first high-pressure rubber pipe; 302, the second high-pressure rubber pipe; 303, the second high-pressure rubber pipe; 401, the first high-pressure ball valve; 402, the second high-pressure ball valve; 403-third high pressure ball valve; The 404-the four high-pressure ball valve; 501, the first relief valve; 502, the second relief valve; 601, the first single-direction and dual-direction throttle valve; 602, the second single-direction and dual-direction throttle valve; 603, the 3rd single-direction and dual-direction throttle valve; 701, the first hydraulic lock; 702, the second hydraulic lock; 8, pilot operated directional control valve; 901, the first three-position electromagnetic selector valve; 902, the second three-position electromagnetic selector valve; 1001, the first two solenoid directional control valves; 1002, the second two solenoid directional control valves; 11, one-way throttle valve; 12, Pilot operated check valve; 13, one-way valve; 14, fuel feeding control loop; 15, low speed control loop; 16, high speed control loop; 17, break loop.
Embodiment
Embodiment 1:
The defect in use existing for overcoming prior art tundish car traveling control device, the invention provides a kind of high low speed and switch oil hydraulic motor control gear, as shown in Figure 1, comprise oil hydraulic motor 1, break 2, hydraulic station, also comprise fuel feeding control loop 14, low speed control loop 15, high speed control loop 16 and break loop 17; Described hydraulic station is connected with fuel feeding control loop 14;
Described low speed control loop 15 is connected with fuel feeding control loop 14, high speed control loop 16 respectively; Described high speed control loop 16 is connected with fuel feeding control loop 14 and oil hydraulic motor 1 respectively; Described break loop 17 is connected with fuel feeding control loop 14 and break 2 respectively.
In the time that tundish car is walked pouring position and baking position, by fuel feeding control loop 14, operator are cutoff high oil sources easily, makes tundish car can rest on reliably the position of technological requirement, prevents that misoperation and hydrovalve fault from causing tundish walking out-of-control phenomenon.By low speed control loop 15, operator can control the low speed walking performance of tundish car easily, particularly can avoid the impact phenomenon occurring in the time that tundish car starts and stops.By high speed control loop 16; operator can control the walking of tundish fast; save tundish car moves to pouring position time from preheating position; simultaneously in the time there is accident in cast; tundish can be fled from pouring position fast; protection tundish car equipment is not burnt by molten steel, and guarantee equipment and personnel's safety, avoids occurring industrial accident.
Embodiment 2:
High low speed switches an oil hydraulic motor control gear as described in Example 1, also comprises the 4th high-pressure ball valve 404 and P6 hydraulic fluid port that two communicates and P7 hydraulic fluid port, one-way valve 13 and T6 hydraulic fluid port that two communicates and T7 hydraulic fluid port, power oil sources P0 and oil return T0 from hydraulic station; Described fuel feeding control loop 14 joins with P6 hydraulic fluid port, and described P7 hydraulic fluid port is connected with the power oil sources P0 from hydraulic station, and described fuel feeding control loop 14 joins with T6 hydraulic fluid port, and described T7 hydraulic fluid port is connected with the oil return T0 from hydraulic station;
In order to cut off and supply with high-pressure oil sources in the time breaking down, guarantee system safe and reliable, the A1 hydraulic fluid port that is provided with Pilot operated check valve 12 and the second two 1002, the second two solenoid directional control valves 1002 of solenoid directional control valve in described fuel feeding control loop 14 is connected with the X hydraulic fluid port of Pilot operated check valve 12.
In described low speed control loop 15, be provided with the second three-position electromagnetic selector valve 902, the second hydraulic lock 702, the 3rd single-direction and dual-direction throttle valve 603, locking position when the second hydraulic lock 702 stops for tundish car, speed when the 3rd single-direction and dual-direction throttle valve 603 is walked for tundish car running motor low speed regulates; The A2 hydraulic fluid port of described the second three-position electromagnetic selector valve 902 is connected with the A9 hydraulic fluid port in low speed control loop 15 by the second hydraulic lock 702, the 3rd single-direction and dual-direction throttle valve 603; The B2 hydraulic fluid port of described the second three-position electromagnetic selector valve 902 is connected with the B9 hydraulic fluid port in low speed control loop 15 by the second hydraulic lock 702, the 3rd single-direction and dual-direction throttle valve 603;
In described high speed control loop 16, be provided with the first three-position electromagnetic selector valve 901, the second single-direction and dual-direction throttle valve 602, pilot operated directional control valve 8, the first hydraulic lock 701, the first single-direction and dual-direction throttle valve 601, the first relief valve 501 and the second relief valve 502; The A3 hydraulic fluid port of described the first three-position electromagnetic selector valve 901 is connected with the aX hydraulic fluid port of pilot operated directional control valve 8 by the second single-direction and dual-direction throttle valve 602; The B3 hydraulic fluid port of the first three-position electromagnetic selector valve 901 is connected with the bY hydraulic fluid port of pilot operated directional control valve 8 by the second single-direction and dual-direction throttle valve 602;
When the second single-direction and dual-direction throttle valve 602 switches for tundish car running motor high, low speed, the switch speed of pilot operated directional control valve 8 is regulated, when guarantee speed is switched, tundish car operates steadily, and avoids occurring line shock phenomenon;
The A5 hydraulic fluid port of described pilot operated directional control valve 8 is connected with 16 A10 hydraulic fluid port in high speed control loop by the first hydraulic lock 701, the first single-direction and dual-direction throttle valve 601 respectively; The B5 hydraulic fluid port of the pilot operated directional control valve 8 in high speed control loop 16 is connected with the B10 hydraulic fluid port in high speed control loop 16 by the first hydraulic lock 701, the first single-direction and dual-direction throttle valve 601 respectively; A10 hydraulic fluid port is connected with B10 hydraulic fluid port by the first relief valve 501; B10 hydraulic fluid port is connected with A10 hydraulic fluid port by the second relief valve 502;
Speed when the first single-direction and dual-direction throttle valve 601 is walked at a high speed for tundish car running motor regulates;
The first relief valve 501, the second relief valve 502, for safety protection, prevent motor line overpressure, damage pipeline and motor apparatus;
In described break loop 17, be provided with the first two solenoid directional control valves 1001 and one-way throttle valves 11, the A4 hydraulic fluid port of described the first two solenoid directional control valves 1001 is connected with the X2 hydraulic fluid port in break loop 17 by one-way throttle valve 11.
One-way throttle valve 11 regulates for the retro-speed of break 2, moves the too fast tundish car walking impact phenomenon that causes while preventing break braking.
The P2 hydraulic fluid port of the second three-position electromagnetic selector valve 902 in described low speed control loop 15 is connected with the A6 hydraulic fluid port of the one-way valve 12 in fuel feeding control loop 14, and the T2 hydraulic fluid port of the second three-position electromagnetic selector valve 902 is connected with the T6 hydraulic fluid port of one-way valve 13; A9 hydraulic fluid port is connected with the A11 hydraulic fluid port in high speed control loop 16, and B9 hydraulic fluid port is connected with the B11 hydraulic fluid port in high speed control loop 16.
The P3 hydraulic fluid port of the first three-position electromagnetic selector valve 901 in described high speed control loop 16 is connected with the A6 hydraulic fluid port of the one-way valve 12 in fuel feeding control loop 14, and the T3 hydraulic fluid port of the first three-position electromagnetic selector valve 901 is connected with the T6 hydraulic fluid port of one-way valve 13; A10 hydraulic fluid port is connected with the A8 hydraulic fluid port of oil hydraulic motor 1 by the first high-pressure ball valve 401, the first high-pressure rubber pipe 301 respectively, and B10 hydraulic fluid port is connected with the B8 hydraulic fluid port of oil hydraulic motor 1 by the second high-pressure ball valve 402, the second high-pressure rubber pipe 302 respectively.The P4 hydraulic fluid port of the first two solenoid directional control valves 1001 in described break control loop 17 is connected with the A6 hydraulic fluid port of unidirectional 12 in fuel feeding control loop 14, and the first two T4 hydraulic fluid ports of solenoid directional control valve 1001 and the T6 hydraulic fluid port of one-way valve 13 are connected; X2 hydraulic fluid port is connected with the X1 hydraulic fluid port of break 2 by third high pressure ball valve 403, third high moulding pipe 303 respectively.
In the time of work, the electromagnet b of the second two solenoid directional control valves 1002 obtains electric, open with the second two Pilot operated check valves that solenoid directional control valve 1002 is connected 12, the electromagnet b of the first two solenoid directional control valves 1001 obtains electric, running motor break 2 unclamps, and break speed is by regulating one-way throttle valve 11 to realize; The electromagnet of the second three-position electromagnetic selector valve 902 obtains electric, and tundish car running motor is realized low-speed running, and the speed of travel is by regulating the 3rd single-direction and dual-direction throttle valve 603 to realize; The electromagnet of the second three-position electromagnetic selector valve 902 obtains, and that electromagnet electric, the first three-position electromagnetic selector valve 901 obtains is electric, and tundish car running motor is realized walking at a high speed, and the high speed speed of travel is by regulating the 3rd single-direction and dual-direction throttle valve 603 to realize; When tundish car running motor high, low speed is switched, the switch speed of pilot operated directional control valve 8 is regulated and realized by adjusting the second single-direction and dual-direction throttle valve 602, when guarantee speed is switched, tundish car operates steadily, and avoids occurring line shock phenomenon;
More than exemplifying is only to illustrate of the present invention, does not form the restriction to protection scope of the present invention, within the every and same or analogous design of the present invention all belongs to protection scope of the present invention.
Claims (5)
1. one kind high low speed switches oil hydraulic motor control gear, comprise oil hydraulic motor (1), break (2), hydraulic station, it is characterized in that: also comprise fuel feeding control loop (14), low speed control loop (15), high speed control loop (16) and break loop (17);
Described hydraulic station is connected with fuel feeding control loop (14);
Described low speed control loop (15) is connected with fuel feeding control loop (14), high speed control loop (16) respectively; Described high speed control loop (16) is connected with fuel feeding control loop (14) and oil hydraulic motor (1) respectively; Described break loop (17) is connected with fuel feeding control loop (14) and break (2) respectively.
2. the high low speed of one as claimed in claim 1 switches oil hydraulic motor control gear, it is characterized in that: also comprise the 4th high-pressure ball valve (404) and P6 hydraulic fluid port that two communicates and P7 hydraulic fluid port, one-way valve (13) and T6 hydraulic fluid port that two communicates and T7 hydraulic fluid port, power oil sources P0 and oil return T0 from hydraulic station;
Described fuel feeding control loop (14) joins with P6 hydraulic fluid port, and described P7 hydraulic fluid port is connected with the power oil sources P0 from hydraulic station, and described fuel feeding control loop (14) joins with T6 hydraulic fluid port, and described T7 hydraulic fluid port is connected with the oil return T0 from hydraulic station;
In described fuel feeding control loop (14), be provided with Pilot operated check valve (12) and the second two solenoid directional control valves (1002), the A1 hydraulic fluid port of the second two solenoid directional control valves (1002) is connected with the X hydraulic fluid port of Pilot operated check valve (12);
In described low speed control loop (15), be provided with the second three-position electromagnetic selector valve (902), the second hydraulic lock (702), the 3rd single-direction and dual-direction throttle valve (603), the A2 hydraulic fluid port of described the second three-position electromagnetic selector valve (902) is connected with the A9 hydraulic fluid port in low speed control loop (15) by the second hydraulic lock (702), the 3rd single-direction and dual-direction throttle valve (603); The B2 hydraulic fluid port of described the second three-position electromagnetic selector valve (902) is connected with the B9 hydraulic fluid port in low speed control loop (15) by the second hydraulic lock (702), the 3rd single-direction and dual-direction throttle valve (603);
In described high speed control loop (16), be provided with the first three-position electromagnetic selector valve (901), the second single-direction and dual-direction throttle valve (602), pilot operated directional control valve (8), the first hydraulic lock 701, the first single-direction and dual-direction throttle valve (601), the first relief valve (501) and the second relief valve (502);
The A3 hydraulic fluid port of described the first three-position electromagnetic selector valve (901) is connected with the aX hydraulic fluid port of pilot operated directional control valve (8) by the second single-direction and dual-direction throttle valve (602); The B3 hydraulic fluid port of the first three-position electromagnetic selector valve (901) is connected with the bY hydraulic fluid port of pilot operated directional control valve (8) by the second single-direction and dual-direction throttle valve (602);
The A5 hydraulic fluid port of described pilot operated directional control valve (8) is connected with the A10 hydraulic fluid port of (16) in high speed control loop by the first hydraulic lock (701), the first single-direction and dual-direction throttle valve (601) respectively; The B5 hydraulic fluid port of the pilot operated directional control valve (8) in high speed control loop (16) is connected with the B10 hydraulic fluid port in high speed control loop (16) by the first hydraulic lock (701), the first single-direction and dual-direction throttle valve (601) respectively; A10 hydraulic fluid port is connected with B10 hydraulic fluid port by the first relief valve (501); B10 hydraulic fluid port is connected with A10 hydraulic fluid port by the second relief valve (502);
In described break loop (17), be provided with the first two solenoid directional control valves (1001) and one-way throttle valves (11), the A4 hydraulic fluid port of described the first two solenoid directional control valves (1001) is connected with the X2 hydraulic fluid port in break loop (17) by one-way throttle valve (11).
3. the high low speed of one as claimed in claim 1 or 2 switches oil hydraulic motor control gear, it is characterized in that: the P2 hydraulic fluid port of the second three-position electromagnetic selector valve (902) in described low speed control loop (15) is connected with the A6 hydraulic fluid port of the one-way valve (12) in fuel feeding control loop (14), and the T2 hydraulic fluid port of the second three-position electromagnetic selector valve (902) is connected with the T6 hydraulic fluid port of one-way valve (13); A9 hydraulic fluid port is connected with the A11 hydraulic fluid port in high speed control loop (16), and B9 hydraulic fluid port is connected with the B11 hydraulic fluid port in high speed control loop (16).
4. the high low speed of one as claimed in claim 1 or 2 switches oil hydraulic motor control gear, it is characterized in that: the P3 hydraulic fluid port of the first three-position electromagnetic selector valve (901) in described high speed control loop (16) is connected with the A6 hydraulic fluid port of the one-way valve (12) in fuel feeding control loop (14), and the T3 hydraulic fluid port of the first three-position electromagnetic selector valve (901) is connected with the T6 hydraulic fluid port of one-way valve (13); A10 hydraulic fluid port is connected with the A8 hydraulic fluid port of oil hydraulic motor (1) by the first high-pressure ball valve (401), the first high-pressure rubber pipe (301) respectively, and B10 hydraulic fluid port is connected with the B8 hydraulic fluid port of oil hydraulic motor (1) by the second high-pressure ball valve (402), the second high-pressure rubber pipe (302) respectively.
5. the high low speed of one as claimed in claim 1 or 2 switches oil hydraulic motor control gear, it is characterized in that: the P4 hydraulic fluid port of the first two solenoid directional control valves (1001) in described break control loop (17) is connected with the A6 hydraulic fluid port of the one-way valve (12) in fuel feeding control loop (14), the T4 hydraulic fluid port of the first two solenoid directional control valves (1001) is connected with the T6 hydraulic fluid port of one-way valve (13); X2 hydraulic fluid port is connected with the X1 hydraulic fluid port of break (2) by third high pressure ball valve (403), third high moulding pipe (303) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410397188.8A CN104196779B (en) | 2014-08-14 | 2014-08-14 | A kind of high low speed switches oil hydraulic motor control gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410397188.8A CN104196779B (en) | 2014-08-14 | 2014-08-14 | A kind of high low speed switches oil hydraulic motor control gear |
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| Publication Number | Publication Date |
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| CN104196779A true CN104196779A (en) | 2014-12-10 |
| CN104196779B CN104196779B (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410397188.8A Active CN104196779B (en) | 2014-08-14 | 2014-08-14 | A kind of high low speed switches oil hydraulic motor control gear |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065348A (en) * | 2015-07-06 | 2015-11-18 | 西安科技大学 | Soft start walking system |
| CN105774540A (en) * | 2016-04-29 | 2016-07-20 | 徐州徐工环境技术有限公司 | Walking high-low-speed switching device of fully hydraulic driving road sweeping machine |
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| JPH07269506A (en) * | 1994-03-29 | 1995-10-17 | Sumitomo Constr Mach Co Ltd | Drive circuit for hydraulic motor |
| JP2003148405A (en) * | 2001-11-08 | 2003-05-21 | Kayaba Ind Co Ltd | Driving device of hydraulic motor |
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| CN102518610A (en) * | 2011-12-15 | 2012-06-27 | 常德中联重科液压有限公司 | Motor control loop and control valve |
| CN103256264A (en) * | 2013-05-10 | 2013-08-21 | 三一汽车起重机械有限公司 | Hydraulic system and engineering machinery with same |
| CN103727076A (en) * | 2013-11-19 | 2014-04-16 | 徐州重型机械有限公司 | Hydraulic-controlled rotation control device and crane rotation system |
| CN204126994U (en) * | 2014-08-14 | 2015-01-28 | 中国重型机械研究院股份公司 | A kind of high low speed switches oil hydraulic motor control gear |
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| JPH07269506A (en) * | 1994-03-29 | 1995-10-17 | Sumitomo Constr Mach Co Ltd | Drive circuit for hydraulic motor |
| JP2003148405A (en) * | 2001-11-08 | 2003-05-21 | Kayaba Ind Co Ltd | Driving device of hydraulic motor |
| CN102390257A (en) * | 2011-09-15 | 2012-03-28 | 江苏四明工程机械有限公司 | High and low-speed travel driving electric-hydraulic control system of engineering machinery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065348A (en) * | 2015-07-06 | 2015-11-18 | 西安科技大学 | Soft start walking system |
| CN105774540A (en) * | 2016-04-29 | 2016-07-20 | 徐州徐工环境技术有限公司 | Walking high-low-speed switching device of fully hydraulic driving road sweeping machine |
| CN105774540B (en) * | 2016-04-29 | 2017-11-28 | 徐州徐工环境技术有限公司 | A kind of all-hydraulic-driven road sweeper walking high and low speed switching device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104196779B (en) | 2016-04-20 |
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