CN104006017B - The walking hydraulic control system of asphalt pavement maintanance truck - Google Patents
The walking hydraulic control system of asphalt pavement maintanance truck Download PDFInfo
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- CN104006017B CN104006017B CN201410246097.4A CN201410246097A CN104006017B CN 104006017 B CN104006017 B CN 104006017B CN 201410246097 A CN201410246097 A CN 201410246097A CN 104006017 B CN104006017 B CN 104006017B
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Abstract
The invention belongs to technical field of hydraulic, especially relate to a kind of walking hydraulic control system of asphalt pavement maintanance truck, it is characterized in that comprising fuel tank, walking pump, drive motor and the flow divider-combiner group be connected between described walking pump and drive motor.The present invention be different from the past to front traveling gear adopt separately propons hydraulic driving and to rear traveling gear adopt single pump drive double motor drive, by propons hydraulic driving and the ingenious combination of hydrostatic drive, the hydraulic pressure four-wheel drive of front and back walking improves the tractive force of machine and passes through performance, and overcome original driving mode tractive force not enough or because of motor rotary speed not etc., make the defect that driving wheel cannot be synchronous.
Description
Technical field
The invention belongs to technical field of hydraulic, especially relate to a kind of walking hydraulic control system of asphalt pavement maintanance truck.
Background technique
Asphalt pavement maintanance truck is a kind of maintenance road surface, paves to asphalt pavement wearing course, and can carry out the large-scale car kits of surface-treated by the slight rut in road pavement.In prior art, two kinds are generally to the drived control that the running gear of this type of traveling vehicle adopts: the first adopts propons hydraulic driving to front traveling gear, but front axle wheel load only accounts for about 30% of complete vehicle weight, causes car load tractive force inadequate; The second adopts single pump to drive double motor to drive to rear traveling gear, and this kind of mode, when wheel-borne load is different, easily causes motor rotary speed not, cannot reach driving wheel synchronous effect.
Summary of the invention
The object of this invention is to provide a kind of structure simple, with low cost, and the hydraulic pressure propons that can realize the front traveling gear of synchronous effect drives and the walking hydraulic control system of the asphalt pavement maintanance truck of the hydrostatic drive of rear traveling gear.
The object of the invention is to be realized by following technical proposals:
The walking hydraulic control system of asphalt pavement maintanance truck of the present invention, it is characterized in that comprising fuel tank, walking pump, drive motor and the flow divider-combiner group be connected between described walking pump and drive motor, described drive motor is primarily of the propons oil motor be connected with front traveling gear, the left drive motor be connected with rear traveling gear respectively and right drive motor formed, described walking pump comprises variable displacement pump, proportional electromagnetic valve, slippage pump, walking pump first actuator port and walking pump second actuator port, described walking pump first actuator port is by oil circuit I, oil circuit II and oil circuit III formed, described oil circuit I is connected with described propons oil motor, described oil circuit II is connected with described left drive motor, described oil circuit III is connected with described right drive motor, described walking pump second actuator port is connected with described flow divider-combiner group, this flow divider-combiner group respectively with propons oil motor, left drive motor is connected with right drive motor, described walking pump, propons oil motor, left drive motor is connected with described fuel tank respectively with right drive motor.
Described flow divider-combiner group comprises one-level flow divider-combiner, the bleed off circuit I that is connected of one-level flow divider-combiner and bleed off circuit II therewith, be located at the secondary flow divider-combiner on described bleed off circuit II, the bleed off circuit III that is connected of secondary flow divider-combiner and bleed off circuit IV therewith, described bleed off circuit III is connected with described right drive motor, and described bleed off circuit IV is connected with described left drive motor.
Advantage of the present invention:
(1) the walking hydraulic control system of asphalt pavement maintanance truck of the present invention, be different from the past to front traveling gear adopt separately propons hydraulic driving and to rear traveling gear adopt single pump drive double motor drive, by propons hydraulic driving and the ingenious combination of hydrostatic drive, form closed circuit control, the hydraulic pressure four-wheel drive of front and back walking improves the tractive force of machine and passes through performance, and overcome original driving mode tractive force not enough or because of motor rotary speed not etc., make the defect that driving wheel cannot be synchronous;
(2) the walking hydraulic control system of asphalt pavement maintanance truck of the present invention have employed flow divider-combiner group and participates in hydraulic control, when making running motor bear different loads, automatically regulated by the pressure of inside and flow-sensitive parts, ensure that running motor advances, synchronous when retreating.
Accompanying drawing explanation
Fig. 1 is hydraulic schematic diagram of the present invention.
Embodiment
The specific embodiment of the present invention is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, the walking hydraulic control system of asphalt pavement maintanance truck of the present invention, it is characterized in that comprising fuel tank 13, walking pump 1, drive motor and the flow divider-combiner group 5 be connected between described walking pump 1 and drive motor, described drive motor is primarily of the propons oil motor 9 be connected with front traveling gear, the left drive motor 11 be connected with rear traveling gear respectively and right drive motor 10 formed, described walking pump 1 comprises variable displacement pump 2, proportional electromagnetic valve 17, slippage pump 16, this walking pump is the cam-type axial piston pump for closed circuit, walking pump first actuator port 3 and walking pump second actuator port 15, described walking pump 1 is band proportional electromagnetic valve 17, the cam-type axial piston pump for closed circuit of device such as slippage pump 16 grade, described walking pump first actuator port 3 is by oil circuit I 18, oil circuit II 20 and oil circuit III 19 formed, described oil circuit I 18 is connected with described propons oil motor 9, described oil circuit II 20 is connected with described left drive motor 11, described oil circuit III 19 is connected with described right drive motor 10, described walking pump second actuator port 15 is connected with described flow divider-combiner group 5, this flow divider-combiner group 5 respectively with propons oil motor 9, left drive motor 11 is connected with right drive motor 10, described walking pump 1, propons oil motor 9, left drive motor 11 is connected with described fuel tank 13 respectively with right drive motor 10.
Described flow divider-combiner group 5 comprises one-level flow divider-combiner 14, the bleed off circuit I 4 that is connected of one-level flow divider-combiner 14 and bleed off circuit II 12 therewith, by inlet throttle and the outlet throttling of one-level flow divider-combiner 14, guarantee that bleed off circuit I 4 is equal with bleed off circuit II 12 flow or proportional, be located at the secondary flow divider-combiner 6 on described bleed off circuit II 12, the bleed off circuit III 7 that is connected of secondary flow divider-combiner 6 and bleed off circuit IV 8, guarantee that bleed off circuit III 7 is equal with bleed off circuit IV 8 flow therewith.Described bleed off circuit III 7 is connected with described right drive motor 10, and described bleed off circuit IV 8 is connected with described left drive motor 11.
The walking hydraulic control system working procedure of asphalt pavement maintanance truck of the present invention:
The walking hydraulic control system of asphalt pavement maintanance truck wants to meet the synchronous of front walking and rear walking, and flow must meet A=KB, B=C+D, C=D.
A-bleed off circuit I flow (i.e. propons oil motor flow);
B-bleed off circuit II flow (i.e. left and right driving motor total discharge);
C-bleed off circuit III flow (i.e. left drive motor flow);
D-bleed off circuit IV flow (i.e. right drive motor flow);
K-scaling factor.
During advance, high-voltage oil liquid passes to propons oil motor 9, left drive motor 11 and right drive motor 10 from walking pump 1 through walking pump first actuator port 3 and drives vehicle to advance, low pressure oil from propons oil motor 9, left drive motor 11 and right drive motor 10 through flow divider-combiner group 5 oil return, according to oil circuit design guarantee three motor oil return flow A=KB of flow divider-combiner group 5, B=C+D, C=D, and then realize advancing synchronously.Pass to the second actuator port 15 of walking pump through flow divider-combiner group 5 fluid, more again export high pressure oil through walking pump first actuator port 3, periodic duty like this.
During reversing, fluid passes to flow divider-combiner 5 groups by assignment of traffic from walking pump second actuator port 15, ensures A=KB, B=C+D, C=D, the fluid distributed enters propons oil motor 3, left drive motor 11 and right drive motor 10 from flow divider-combiner 5 groups, and then it is synchronous to realize reversing.Fluid through three motors enters walking pump first actuator port 3, then enters walking pump second actuator port 15, periodic duty like this.
The present invention controls the flow input of propons oil motor 9, left drive motor 11 and right drive motor 10 by increasing the input current reducing throttle or change proportional electromagnetic valve 17 on walking pump, and then controls the speed of travel.Flow divider-combiner group 5 participates in hydraulic control, when making drive motor bear different loads, is automatically regulated by the pressure of inside and flow-sensitive parts, ensures that drive motor advances, synchronous when retreating.The walking hydraulic control system of asphalt pavement maintanance truck of the present invention, be different from the past to front traveling gear adopt separately propons hydraulic driving and to rear traveling gear adopt single pump drive double motor drive, by propons hydraulic driving and the ingenious combination of hydrostatic drive, form closed circuit control, the hydraulic pressure four-wheel drive of front and back walking improves the tractive force of machine and passes through performance, and overcome original driving mode tractive force not enough or because of motor rotary speed not etc., make the defect that driving wheel cannot be synchronous.
Claims (2)
1. the walking hydraulic control system of an asphalt pavement maintanance truck, it is characterized in that comprising fuel tank, walking pump, drive motor and the flow divider-combiner group be connected between described walking pump and drive motor, described drive motor is primarily of the propons oil motor be connected with front traveling gear, the left drive motor be connected with rear traveling gear respectively and right drive motor formed, described walking pump comprises variable displacement pump, proportional electromagnetic valve, slippage pump, walking pump first actuator port and walking pump second actuator port, described walking pump first actuator port is by oil circuit I, oil circuit II and oil circuit III formed, described oil circuit I is connected with described propons oil motor, described oil circuit II is connected with described left drive motor, described oil circuit III is connected with described right drive motor, described walking pump second actuator port is connected with described flow divider-combiner group, this flow divider-combiner group respectively with propons oil motor, left drive motor is connected with right drive motor, described walking pump, propons oil motor, left drive motor is connected with described fuel tank respectively with right drive motor.
2. the walking hydraulic control system of asphalt pavement maintanance truck according to claim 1, it is characterized in that described flow divider-combiner group comprises one-level flow divider-combiner, the bleed off circuit I that is connected of one-level flow divider-combiner and bleed off circuit II therewith, be located at the secondary flow divider-combiner on described bleed off circuit II, the bleed off circuit III that is connected of secondary flow divider-combiner and bleed off circuit IV therewith, described bleed off circuit III is connected with described right drive motor, and described bleed off circuit IV is connected with described left drive motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410246097.4A CN104006017B (en) | 2014-06-05 | 2014-06-05 | The walking hydraulic control system of asphalt pavement maintanance truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410246097.4A CN104006017B (en) | 2014-06-05 | 2014-06-05 | The walking hydraulic control system of asphalt pavement maintanance truck |
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| Publication Number | Publication Date |
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| CN104006017A CN104006017A (en) | 2014-08-27 |
| CN104006017B true CN104006017B (en) | 2016-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410246097.4A Active CN104006017B (en) | 2014-06-05 | 2014-06-05 | The walking hydraulic control system of asphalt pavement maintanance truck |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412827B (en) * | 2018-05-16 | 2024-03-08 | 湖南星邦智能装备股份有限公司 | Hydraulic walking control system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1182690A (en) * | 1967-08-29 | 1970-03-04 | Applied Power Ind Inc | Hydraulic Control for Asphalt Spreader |
| JP2006009272A (en) * | 2004-06-22 | 2006-01-12 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Travel drive unit of wheel-traveling type asphalt finisher |
| CN201367547Y (en) * | 2009-01-16 | 2009-12-23 | 广西柳工机械股份有限公司 | Spreader screw mechanism electrohydraulic driving device |
| PL2366832T3 (en) * | 2010-03-18 | 2016-03-31 | Voegele Ag J | Method and paver for producing a compacted paved surface |
| CN202271839U (en) * | 2011-09-15 | 2012-06-13 | 江苏四明工程机械有限公司 | High-and-low-speed travel driving electrohydraulic control system for engineering machinery |
| CN103114516B (en) * | 2013-01-31 | 2014-12-17 | 徐州徐工筑路机械有限公司 | Hydraulic system of asphalt pavement maintenance vehicle |
| CN203868011U (en) * | 2014-06-05 | 2014-10-08 | 鞍山森远路桥股份有限公司 | Traveling hydraulic control system of bituminous pavement maintenance vehicle |
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| CN104006017A (en) | 2014-08-27 |
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