CN203403449U - Rotation speed self-adaptation system for hydraulic excavator loading operation - Google Patents
Rotation speed self-adaptation system for hydraulic excavator loading operation Download PDFInfo
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- CN203403449U CN203403449U CN201320408508.6U CN201320408508U CN203403449U CN 203403449 U CN203403449 U CN 203403449U CN 201320408508 U CN201320408508 U CN 201320408508U CN 203403449 U CN203403449 U CN 203403449U
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- control valve
- swing arm
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- spool
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Abstract
The utility model discloses a rotation speed self-adaptation system for hydraulic excavator loading operation. The system comprises a left pump (1), a right pump (2), a boom cylinder (8), a rotary motor (7), a main control valve (3), a pilot oil pump (11), an engine, a rotation speed sensor, a controller, a boom lifting pilot pressure switch and an electromagnetic proportional pressure reducing valve (10). The pilot oil pump, the left pump and the right pump are connected in series for oil supply, and the left pump and the right pump are connected with the boom cylinder and the rotary motor respectively through the main control valve; the pilot oil pump is connected with a hydraulic control reversing valve through the electromagnetic proportional pressure reducing valve; the rotation speed sensor is arranged on the engine; the controller is respectively connected with the electromagnetic proportional pressure reducing valve and the boom lifting pilot pressure switch. On the condition that the internal structure of the main control valve is not changed, an excavator has the best loading performance when working at different rotation speeds due to the fact that other simple parts are added externally, and the rotation speed self-adaptation system has the advantages of being simple in structure and low in cost investment.
Description
Technical field
The utility model relates to a kind of hydraulic crawler excavator car loading operation, specifically a kind ofly when different rotating speeds is worked, all has the hydraulic crawler excavator car loading operation rotating speed Adaptable System of best car loading operation performance when hydraulic crawler excavator.
Background technology
The car loading operation of excavator mainly refers to that swing arm promotes and revolution action is carried out simultaneously, and as one of working condition of frequent use, the quality of its performance has reflected the level of overall performance to a certain extent.
At present, swing arm in most of excavators promotes and revolution action adopts series connection double pump fuel feeding, wherein revolution action is by right oil pump feed, swing arm promotes by right pump and left pump while fuel feeding, now, the quality of car loading operation performance is right pump discharge in the assignment of traffic ratio coordination problem of rotary motor and boom cylinder; Due to swing arm, to promote load larger, and revolution operating duty is less, if do not increase assignment of traffic restriction, can cause the most of fluid of right pump to flow into rotary motor, makes when above-mentioned composite move swing arm promote slower, and speed of gyration is very fast, car loading operation poor performance.
As shown in Figure 2, in order to improve car loading operation effect, producer generally increases pilot operated directional control valve or throttle orifice before revolution action in main control valve; During car loading operation action, the fluid of right pump flow through this pilot operated directional control valve or throttle orifice, by increasing the principal pressure of rotary motor, reduce the fluid amount of going to rotary motor, increase the fluid of going to boom cylinder, the fluid flowing out from right pump is carried out to certain distribution, and the situation of avoiding the most of fluid of right pump to flow into rotary motor occurs.But because the area of this pilot operated directional control valve and throttle orifice is steady state value, when engine speed changes, right pump discharge can change thereupon, make also can change by the flow of pilot operated directional control valve or throttle orifice; And can make the pressure differential at its two ends change during the changes in flow rate of pilot operated directional control valve or throttle orifice, the pressure of going to rotary motor changes, the fluid flow that makes right pump be assigned to boom cylinder and rotary motor changes, and causes car loading operation performance variation.
Summary of the invention
The problem existing for above-mentioned prior art, the utility model provides a kind of hydraulic crawler excavator car loading operation rotating speed Adaptable System, can guarantee that hydraulic crawler excavator still has good car loading operation performance when different rotating speeds is worked.
To achieve these goals, a kind of hydraulic crawler excavator car loading operation of the utility model rotating speed Adaptable System, comprise left pump, right pump, boom cylinder, rotary motor, main control valve and guide's oil pump, guide's oil pump, left pump and right series connection of pumps fuel feeding, main control valve comprises swing arm I spool, swing arm II spool, pilot operated directional control valve and revolution action spool, and left pump is connected with boom cylinder by swing arm I spool; Right pump is connected with boom cylinder by swing arm II spool, and by pilot operated directional control valve, is connected with rotary motor with revolution action spool successively, also comprises that motor, speed probe, controller, swing arm promote pilot pressure switch and solenoid-operated proportional reducing valve; Described guide's oil pump is connected with pilot operated directional control valve by solenoid-operated proportional reducing valve; Described speed probe is arranged on motor, and is connected with controller; Described controller promotes pilot pressure switch with solenoid-operated proportional reducing valve and swing arm respectively and is connected.
Further, also can comprise alarm, described alarm is connected with controller.
Further, also can comprise relay and LED lamp, described LED lamp is connected with controller by relay.
Compare with existing control mode, the utility model is by setting up motor, speed probe, controller, swing arm promotes pilot pressure switch and solenoid-operated proportional reducing valve, utilize speed probe to gather the tach signal of motor, and be converted into the output pressure that current signal is controlled solenoid-operated proportional reducing valve, the adjusting of realization to pilot operated directional control valve spool displacement, realized the area of throttle orifice has been adjusted in real time, when motor is during in different rotating speeds, swing arm promotes and revolution action can reach the effect that best complex operates, make excavator when different rotating speeds is worked, all have best car loading operation performance.In addition, the utility model is not changing in the in-built situation of main control valve, and change by additional other simple components and control program realizes above-mentioned functions, also has simple structure, and cost drops into low advantage.
Accompanying drawing explanation
Fig. 1 is control principle schematic diagram of the present utility model;
Fig. 2 is the control principle schematic diagram of traditional approach;
Fig. 3 is the electric theory diagram after the utility model improves.
In figure: 1, left pump, 2, right pump, 3, main control valve, 4, swing arm II spool, 5, pilot operated directional control valve, 6, revolution action spool, 7, rotary motor, 8, boom cylinder, 9, swing arm I spool, 10, solenoid-operated proportional reducing valve, 11, guide's oil pump.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, this hydraulic crawler excavator car loading operation rotating speed Adaptable System, comprise that left pump 1, right pump 2, boom cylinder 8, rotary motor 7, main control valve 3, guide's oil pump 11, motor, speed probe, controller, swing arm promote pilot pressure switch and solenoid-operated proportional reducing valve 10, guide's oil pump 11, left pump 1 and right pump 2 series connection fuel feeding, main control valve 3 comprises swing arm I spool 9, swing arm II spool 4, pilot operated directional control valve 5 and revolution action spool 6, and left pump 2 is connected with boom cylinder 8 by swing arm I spool 9; Right pump 2 is connected with boom cylinder 8 by swing arm II spool 4, and by pilot operated directional control valve 5, is connected with rotary motor 7 with revolution action spool 6 successively; Described guide's oil pump 11 is connected with pilot operated directional control valve 5 by solenoid-operated proportional reducing valve 10; Described speed probe is arranged on motor, and is connected with controller; Described controller promotes pilot pressure switch with solenoid-operated proportional reducing valve 10 and swing arm respectively and is connected.
As shown in Figure 1, left pump 1 is given boom cylinder 8 fuel feeding by swing arm I spool 9; Right pump 2 is given boom cylinder 8 large chamber fuel feeding by swing arm II spool 4, moves spool 6 to rotary motor 7 fuel feeding by revolution simultaneously.First, by the method for test, determine the best entrucking height when engine speed is the highest, determine that swing arm promotes the area of the best throttle orifice that has precedence over revolution action, establishing this area is A; Best entrucking height when motor normally uses minimum speed, determines the now area of best throttle orifice, establishes it for B; Within above-mentioned two kinds of ranges of speeds, in 50r/min, when the best entrucking height that motor is different while using the slow-speed of revolution, determine the area value of corresponding different best throttle orifice.
When swing arm promotes and when revolution composite move carries out car loading operation, swing arm promotes pilot pressure switch open, controller obtains signal, the engine rotational speed signal of speed probe collection is converted to current signal simultaneously and outputs to solenoid-operated proportional reducing valve 10.When engine speed is the highest, controller output current is maximum, and now the output pressure of solenoid-operated proportional reducing valve 10 is zero, and the area of controlling throttle orifice is A; Engine speed is normally used minimum speed constantly, and controller output current is another definite value, and now the output pressure of proportion magnetic valve is 3.9MPa, and the area of controlling throttle orifice is B; And corresponding engine speed is within above-mentioned two ranges of speeds time, output current is linear change, thereby the area that makes throttle orifice in pilot operated directional control valve 5 is linear change thereupon, and then makes the flow of left pump 1 and right pump 2 in boom cylinder 8 and the interior optimal allocation that realizes of rotary motor 7.
When revolution action and other action composite moves, swing arm promotes pilot pressure switch in closed condition, and controller does not collect this signal, so the duty of pilot operated directional control valve 5 in not throttling can guarantee the normal of speed of gyration.
In sum, the utility model is by gathering engine rotational speed signal, through master controller, be treated to current signal output, arrive the input of solenoid-operated proportional reducing valve, regulate the output pressure of solenoid-operated proportional reducing valve, thereby control the displacement of pilot operated directional control valve 5, realize the aperture area of adjusting throttle orifice, reach and when motor different rotating speeds, regulate above-mentioned throttle hole area, make the flow of left pump and right pump in boom cylinder 8 and the interior optimal allocation that realizes of rotary motor 7, and then make car loading operation performance always in optimum state.
As further improvement of the utility model, as shown in Figure 3, this system also can comprise that described alarm is connected with controller for informing the alarm of operator's working state of excavator; Can by controller, control alarm and send different warnings according to the difference of engine speed, inform in time operator, facilitate it to understand in time the duty of motor.
As further improvement of the utility model, as shown in Figure 3, this system also can comprise relay and LED lamp, and described LED lamp is connected with controller by relay; Controller can be according to the turn-on time of the tach signal control relay receiving, and then the fluorescent lifetime of control LED lamp, facilitate user by watching the light on and off of LED lamp and the time of light yellow to know the duty of motor, avoid appearance not know the situation of engine behavior because hearing chimes of doom, also facilitate other people to know at a distance its duty, and then facilitate it to take in time corresponding measure simultaneously.
Claims (3)
1. a hydraulic crawler excavator car loading operation rotating speed Adaptable System, comprise left pump (1), right pump (2), boom cylinder (8), rotary motor (7), main control valve (3) and guide's oil pump (11), guide's oil pump (11), left pump (1) and right pump (2) series connection fuel feeding, main control valve (3) comprises swing arm I spool (9), swing arm II spool (4), pilot operated directional control valve (5) and revolution action spool (6), and left pump (2) is connected with boom cylinder (8) by swing arm I spool (9); Right pump (2) is connected with boom cylinder (8) by swing arm II spool (4), and by pilot operated directional control valve (5), be connected with rotary motor (7) with revolution action spool (6) successively, it is characterized in that, also comprise that motor, speed probe, controller, swing arm promote pilot pressure switch and solenoid-operated proportional reducing valve (10); Described guide's oil pump (11) is connected with pilot operated directional control valve (5) by solenoid-operated proportional reducing valve (10); Described speed probe is arranged on motor, and is connected with controller; Described controller promotes pilot pressure switch with solenoid-operated proportional reducing valve (10) and swing arm respectively and is connected.
2. a kind of hydraulic crawler excavator car loading operation rotating speed Adaptable System according to claim 1, is characterized in that, also comprise alarm, described alarm is connected with controller.
3. a kind of hydraulic crawler excavator car loading operation rotating speed Adaptable System according to claim 1, is characterized in that, also comprise relay and LED lamp, described LED lamp is connected with controller by relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320408508.6U CN203403449U (en) | 2013-07-09 | 2013-07-09 | Rotation speed self-adaptation system for hydraulic excavator loading operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320408508.6U CN203403449U (en) | 2013-07-09 | 2013-07-09 | Rotation speed self-adaptation system for hydraulic excavator loading operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203403449U true CN203403449U (en) | 2014-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320408508.6U Withdrawn - After Issue CN203403449U (en) | 2013-07-09 | 2013-07-09 | Rotation speed self-adaptation system for hydraulic excavator loading operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203403449U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334465A (en) * | 2013-07-09 | 2013-10-02 | 徐州徐工挖掘机械有限公司 | Loading operation rotating speed self-adaptation system of hydraulic excavator |
| CN106884455A (en) * | 2017-03-08 | 2017-06-23 | 青岛雷沃挖掘机有限公司 | Operating mode self-adaptive hydraulic loop and excavator |
-
2013
- 2013-07-09 CN CN201320408508.6U patent/CN203403449U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334465A (en) * | 2013-07-09 | 2013-10-02 | 徐州徐工挖掘机械有限公司 | Loading operation rotating speed self-adaptation system of hydraulic excavator |
| CN103334465B (en) * | 2013-07-09 | 2016-05-18 | 徐州徐工挖掘机械有限公司 | A kind of hydraulic crawler excavator car loading operation rotating speed Adaptable System |
| CN106884455A (en) * | 2017-03-08 | 2017-06-23 | 青岛雷沃挖掘机有限公司 | Operating mode self-adaptive hydraulic loop and excavator |
| CN106884455B (en) * | 2017-03-08 | 2019-05-28 | 青岛雷沃工程机械有限公司 | Operating condition self-adaptive hydraulic circuit and excavator |
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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: 20140122 Effective date of abandoning: 20160518 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |