CN201367547Y - Spreader screw mechanism electrohydraulic driving device - Google Patents
Spreader screw mechanism electrohydraulic driving device Download PDFInfo
- Publication number
- CN201367547Y CN201367547Y CN 200920300252 CN200920300252U CN201367547Y CN 201367547 Y CN201367547 Y CN 201367547Y CN 200920300252 CN200920300252 CN 200920300252 CN 200920300252 U CN200920300252 U CN 200920300252U CN 201367547 Y CN201367547 Y CN 201367547Y
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- control valve
- proportional control
- screw mechanism
- hydraulic pump
- driving device
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Abstract
A spreader screw mechanism electrohydraulic driving device is characterized by comprising a hydraulic pump, wherein the oil outlet cavity of the hydraulic pump is connected with two electric proportional control valve blocks in parallel, each electric proportional control valve is respectively connected on a driving motor, thereby forming a structure that the hydraulic pump simultaneously controls two proportional control valve blocks. A pressure compensator is respectively connected in series on the rear portion of each of the proportional control valve blocks, and a screw distributing mechanism can be driven by the electrohydraulic driving device through adopting the double feedback regulation mode, namely the hydraulic circuit load sensing mode plus the ultrasonic charge level height feedback mode. The spreader screw mechanism electrohydraulic driving device has the advantages that the construction cost of the system device is low, the speed rigid performance of the system load change resistance is easy to improve, and the purposes of reducing cost, saving energy and improving the load change resistance of the system are realized.
Description
Technical field
The utility model relates to a kind of engineering machinery pavement spread equipment, particularly relates to a kind of paver screw mechanism electricity liquid drive unit.
Background technology
Realize carrying the material that paves, distribute to pave and expect then material to be carried out the machinery of compacting leveling, the paver left and right sides is realized from middle past both sides sub-material by two spiral feeding distribution mechanisms usually.
Paver spiral sub-material drives operating characteristic also has much relations to the paving operation quality.According to the difference of the speed of paving, the difference of paving thickness, system provides different self adaptation regulatory functions, is the key that realizes improving operation quality.
The drive system of paver product routine adopts the mode of double pump double motor, automatically controlled pump, and this mode and system can realize the complete machine work requirements; But its system's design cost height.
Summary of the invention
The purpose of this utility model just provides a kind of above problem of having improved, and realizes falling cost, the electric liquid drive unit of paver screw mechanism energy-conservation, the anti-load variations performance of raising system.
Solution of the present utility model is such: have hydraulic pump, going out oil pocket and being connected to two electric proportional control valve pieces at hydraulic pump, each electric proportional control valve piece is connected respectively to a CD-ROM drive motor, constitutes the structure that a hydraulic pump is controlled two CD-ROM drive motors simultaneously.
By adopting the ultrasonic wave material level just to feed back+the electric liquid drive systems spiral feeding distribution mechanism of load sensing mode, use the control mode that novel LVS valve+charged ratio is regulated of band valve post-compensation, substitute conventional system, save cost, realized that machine is regulated flow automatically according to the operating mode needs and flow is not influenced by load variations, speed stability is good, energy saving of system.The LVS valve of charged proportional control is realized the stepless variation of flow, thereby is made helix speed follow the different speed that paves at any time by the scaling signal control of ultrasonic wave feedback, reaches the material level height and regulates purpose automatically.
The utility model has the advantages that system design cost is low, be easy to realize the speed rigid nature of the anti-load variations of raising system, realize falling the purpose of cost, energy-conservation, the anti-load variations performance of raising system.
Description of drawings
Accompanying drawing is embodiment of the present utility model.
Accompanying drawing 1 is a system block diagram of the present utility model.
Accompanying drawing 2 is hydraulic system principle figures of the present utility model.
Accompanying drawing 3 is electric loop figure of the present utility model.
The specific embodiment
The utlity model has hydraulic pump 1, going out oil pocket and being connected to two electric proportional control valve pieces 2,3 at hydraulic pump 1, electricity proportional control valve piece 2 is connected to CD-ROM drive motor 4, electricity proportional control valve piece 3 is connected to CD-ROM drive motor 5, be in series with a pressure compensator 8 behind the proportional control valve piece 2, be in series with a pressure compensator 9 behind the proportional control valve piece 3.
Electricity proportional control valve piece 2 connects with ECU 6; Electricity proportional control valve piece 3 is connected with ECU 7.
Pressure compensator 8 and pressure compensator 9 are for being connected in parallel.
Can see that from accompanying drawing 1 speed of motor is controlled by application valve body among the figure, and valve body valve port opening size is controlled by the ECU output current signal, the pressure drop signal control that the pumpage size is produced by valve port size variation process.Thereby realize that the ultrasonic wave material level just feeds back+the load sensing mode.
Hydraulic pump 1 is by motor driven in the accompanying drawing 2, output flow to two an electric proportional control valve was divided into two-way oil at 2,3 o'clock and drives two motors 4,5, electricity proportional control valve 2,3 is a load-sensing valve, realize the flow-control of two road binders, load sensing valve port size makes its energising by ECU 6 or 7 output signals, and the realization valve port is opened control.
Work one: when ECU detects when needing material conveying, the output signal of telecommunication makes electric proportional control valve 2 or 3 energisings, valve port is opened, because of load-sensing valve has the pressure feedback loop, realize the displacement size adjusting by pressure signal loop hydraulic pump 1, it is big more that valve port is opened big more POF, and motor rotary speed is fast more.
Work two: do not have signal of telecommunication output when not needing material conveying when ECU detects, electricity proportional control valve 2, valve 3 are closed, the motor stall is only kept the required minimum that part of flow of internal system small leakage by the output of pressure feedback control pump simultaneously, and system quits work.
Work three: when bilateral screw mechanism is worked simultaneously, it is lower to suppose that left side ECU detects material level, the signal of telecommunication of output is to the proportioning valve 3 of left side proportioning valve 2 greater than the right, then the opening of left side proportioning valve 2 aperture efficiencies the right proportioning valve 3 is big, be equivalent to whole valve port this moment and become big, pressure drop diminishes, and this pressure drop feedback signal strengthens pumpage, output flow strengthens, and the left side motor is accelerated; When supposing the right greater than the right, process is same as described above.
Work four: when bilateral screw mechanism is worked simultaneously, duty factor the right proportioning valve 3 of supposing left side proportioning valve 2 is big, then the outlet pressure of left side proportioning valve 2 acts on the outlet pressure expansion loop 9 of the right proportioning valve 3, turn down this pressure compensator outlet, so just kept delivery side of pump pressure not descend, pump can be given two motor fuel feeding that load is different simultaneously.When supposing the right greater than the limit, process is same as described above.
Thereby system realizes the energy-conservation adjusting function of (material level is just controlled) output as required under above-mentioned operating mode.A pump double motor mode substitutes double pump double motor mode (above-mentioned) and has saved system cost simultaneously.
The module valve body that proportional control valve piece 2,3 and pressure compensator 8,9 are formed is called " the novel LVS valve of band valve post-compensation ".
Claims (3)
1. paver screw mechanism electricity liquid drive unit, it is characterized in that having hydraulic pump (1), going out oil pocket and being connected to two electric proportional control valve pieces (2,3) at hydraulic pump (1), electricity proportional control valve piece (2) is connected to CD-ROM drive motor (4), electricity proportional control valve piece (3) is connected to CD-ROM drive motor (5), be in series with a pressure compensator (8) behind the proportional control valve piece (2), be in series with a pressure compensator (9) behind the proportional control valve piece (3).
2. paver screw mechanism electricity liquid drive unit according to claim 1 is characterized in that electric proportional control valve piece (2) connects with ECU (6); Electricity proportional control valve piece (3) is connected with ECU (7).
3. paver screw mechanism electricity liquid drive unit according to claim 1 is characterized in that pressure compensator (8) and pressure compensator (9) are for being connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920300252 CN201367547Y (en) | 2009-01-16 | 2009-01-16 | Spreader screw mechanism electrohydraulic driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920300252 CN201367547Y (en) | 2009-01-16 | 2009-01-16 | Spreader screw mechanism electrohydraulic driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201367547Y true CN201367547Y (en) | 2009-12-23 |
Family
ID=41486440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920300252 Expired - Fee Related CN201367547Y (en) | 2009-01-16 | 2009-01-16 | Spreader screw mechanism electrohydraulic driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201367547Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102822420A (en) * | 2010-04-14 | 2012-12-12 | 宝马格有限公司 | Front drive of a road paver and a method for controlling the front drive |
| CN104006017A (en) * | 2014-06-05 | 2014-08-27 | 鞍山森远路桥股份有限公司 | Hydraulic travelling control system of bituminous pavement maintenance truck |
-
2009
- 2009-01-16 CN CN 200920300252 patent/CN201367547Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102822420A (en) * | 2010-04-14 | 2012-12-12 | 宝马格有限公司 | Front drive of a road paver and a method for controlling the front drive |
| CN102822420B (en) * | 2010-04-14 | 2015-03-25 | 宝马格有限公司 | Front drive of a road paver and a method for controlling the front drive |
| CN104006017A (en) * | 2014-06-05 | 2014-08-27 | 鞍山森远路桥股份有限公司 | Hydraulic travelling control system of bituminous pavement maintenance truck |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091223 Termination date: 20160116 |
|
| EXPY | Termination of patent right or utility model |