CN203412026U - Electrohydraulic control system of excavator - Google Patents
Electrohydraulic control system of excavator Download PDFInfo
- Publication number
- CN203412026U CN203412026U CN201320360506.4U CN201320360506U CN203412026U CN 203412026 U CN203412026 U CN 203412026U CN 201320360506 U CN201320360506 U CN 201320360506U CN 203412026 U CN203412026 U CN 203412026U
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- CN
- China
- Prior art keywords
- main pump
- excavator
- pressure sensor
- pump
- control system
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- Expired - Fee Related
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- Operation Control Of Excavators (AREA)
Abstract
The utility model relates to an electrohydraulic control system of an excavator. The electrohydraulic control system of the excavator comprises a pilot pump, a first main pump and a second main pump, wherein the first main pump and the second main pump are connected in series; an engine is jointed with the second main pump; the first main pump and the second main pump are connected with a movable arm cylinder by a main valve bank; the pilot pump is connected with a pilot valve bank; one end of a pilot pressure sensor is connected with the pilot valve bank; the other end of the pilot pressure sensor is connected with a controller which is connected with a power limit solenoid valve. The electrohydraulic control system of the excavator is characterized by also comprising a movable arm big cavity pressure sensor, and the two ends of the movable arm big cavity pressure sensor are respectively connected with the movable arm cylinder and the controller. By using the electrohydraulic control system of the excavator, the flow of hydraulic oil flowing to a movable arm big cavity is rapidly increased, ground supporting operation is without pause or delay phenomena, the normal operation of the system is realized, and potential safety hazards existing in the original scheme are removed.
Description
Technical field
The utility model relates to a kind of electrohydraulic control system of excavator, is specifically related to a kind of excavator and supports while operating, the control system to hydraulic pump.
Background technology
Along with the development of excavator technology, multifunction, an intelligent trend that has become excavator development.This just requires excavator not only can adapt to various operating modes, but also will be applicable to various working environments.When what can not complete, only have the control by changing hydraulic system just may head it off, while declining such as Hydraulic Excavator's Boom, be to lean on the deadweight of excavator swing arm itself to complete, now hydraulic system main pump is worked under minimum injection rate.When swing arm drops to ground, now the large cavity pressure of swing arm declines rapidly, almost in kiss the earth, pressure becomes 0bar, at this time want to prop up rapidly complete machine by equipment, can not complete, have certain time delay pause and just can prop up complete machine, and this action can often be used in process in excavator work, as above, the process of going to the building site, often use equipment as support, if support operation can not complete rapidly, may cause danger, even can cause life danger.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of assurance operational security, the control system to hydraulic pump under the excavator eliminating safe hidden trouble support ground condition.
In order to solve the problems of the technologies described above, the technical solution of the utility model has been to provide a kind of electrohydraulic control system of excavator, the first main pump and the second main pump that comprise pioneer pump and series connection, motor connects the second main pump, the first main pump is connected swing arm cylinder with the second main pump via main valve group, pioneer pump connects pilot valves, one end of pilot pressure sensor connects pilot valves, the other end connects controller, controller connects power limit electromagnetic valve, it is characterized in that: also comprise the large cavity pressure sensor of swing arm, the two ends of the large cavity pressure sensor of swing arm connect respectively swing arm cylinder and controller.
The utility model is on the basis of original control system, increase a pressure sensor, in the process that swing arm declines, when controller detects numerical value that this pressure sensor detects and is less than 60bar, the output of controller will be given signal of power limit electromagnetic valve, the swash plate pivot angle of hydraulic pump is increased rapidly, be that pump power increases, hydraulic pump discharge increases, make so the rapid flow of hydraulic oil that flows to the large chamber of swing arm increase, the operation of support ground does not pause and time delay phenomenon, makes the normal operation of system operation, solves the potential safety hazard that former scheme exists.
Accompanying drawing explanation
The schematic diagram of the electrohydraulic control system of a kind of excavator that Fig. 1 provides for the utility model.
The specific embodiment
For the utility model is become apparent, hereby with preferred embodiment, and coordinate accompanying drawing to be described in detail below.
The utility model provides a kind of electrohydraulic control system of excavator, electricity, liquid system components and parts such as the first main pump 1, the second main pump 2, motor 3, pioneer pump 4, power limit electromagnetic valve 5, controller 6, the large cavity pressure sensor 7 of swing arm, swing arm cylinder 8, main valve 9, pilot pressure sensor 10, pilot valve 11 and swash plates 12, consists of.Motor 3 connects the second main pump 2, the first main pump 1 is connected swing arm cylinder 8 with the second main pump 2 via main valve group 9, pioneer pump 4 connects pilot valves 11, one end of pilot pressure sensor 10 connects pilot valves 11, the other end connects controller 6, controller 6 connects power limit electromagnetic valve 5, also comprises the large cavity pressure sensor 7 of swing arm, and the two ends of the large cavity pressure sensor 7 of swing arm connect respectively swing arm cylinder 8 and controller 6.
Control system mode in former scheme, do not assemble the large cavity pressure sensor 7 of swing arm, swing arm drops in the transients of kiss the earth, electric-control system cannot be predicted the large cavity pressure situation of change of swing arm, cannot anticipation, when the pressure that only has pilot pressure sensor 10 to measure is greater than 6bar, controller power ratio control limit electromagnetic valve 5 electric currents, swash plate 12 pivot angles are increased, main pump 2 the increase of output powers.In this process, have the time delay about 2 seconds, so now support ground action there will be time delay or break in short-term, and feels very obvious, in work progress, this is breakneck.
Existing scheme, wholely added a large cavity pressure sensor 7 of swing arm, like this in swing arm decline process, no matter whether swing arm touches ground, when the pressure that the pressure that the large cavity pressure sensor 7 of swing arm detected when controller 6 is less than 60bar and pilot pressure sensor 10 is greater than 6bar, controller 6 regulates the electric current of pump power limit electromagnetic valve 5 that swash plate 12 pivot angles of main pump 2 are increased immediately, main pump 2 the increase of output powers.When operator does swing arm support and moves, can link up very much so smooth and easy, the phenomenon of action delay and pause while there will not be to former scheme, has well solved because the potential safety hazard that action delay, pause are brought.The effect that increases the large cavity sensor 7 of swing arm is exactly to allow controller 6 detection system pressure condition in advance, and regulates in time the power of main pump 2.Anticipation in advance, controls in advance to system, and the pressure parameter certainly arranging can arrange accordingly according to actual hydraulic pressure system, resolution system action delay, break, and then eliminate safe hidden trouble.
The utility model excavator electrohydraulic system control method is except for also can be used for the similar place of other engineering machinery hydraulic excavator hydraulic system.
Claims (1)
1. the electrohydraulic control system of an excavator, the first main pump (1) and the second main pump (2) that comprise pioneer pump (4) and series connection, motor (3) connects the second main pump (2), the first main pump (1) is connected swing arm cylinder (8) with the second main pump (2) via main valve group (9), pioneer pump (4) connects pilot valves (11), one end of pilot pressure sensor (10) connects pilot valves (11), the other end connects controller (6), controller (6) connects power limit electromagnetic valve (5), it is characterized in that: also comprise the large cavity pressure sensor of swing arm (7), the two ends of the large cavity pressure sensor of swing arm (7) connect respectively swing arm cylinder (8) and controller (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320360506.4U CN203412026U (en) | 2013-06-21 | 2013-06-21 | Electrohydraulic control system of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320360506.4U CN203412026U (en) | 2013-06-21 | 2013-06-21 | Electrohydraulic control system of excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203412026U true CN203412026U (en) | 2014-01-29 |
Family
ID=49974924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320360506.4U Expired - Fee Related CN203412026U (en) | 2013-06-21 | 2013-06-21 | Electrohydraulic control system of excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203412026U (en) |
-
2013
- 2013-06-21 CN CN201320360506.4U patent/CN203412026U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140129 Termination date: 20160621 |