CN111809684A - Control method for avoiding rotation jamming of engineering machinery - Google Patents
Control method for avoiding rotation jamming of engineering machinery Download PDFInfo
- Publication number
- CN111809684A CN111809684A CN202010748696.1A CN202010748696A CN111809684A CN 111809684 A CN111809684 A CN 111809684A CN 202010748696 A CN202010748696 A CN 202010748696A CN 111809684 A CN111809684 A CN 111809684A
- Authority
- CN
- China
- Prior art keywords
- rotation
- pilot oil
- oil way
- slewing
- control method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
Abstract
The invention discloses a control method for avoiding the rotation clamping stagnation of engineering machinery, wherein a control oil way controls the rotation direction through a rotation pilot oil way, a rotation priority state is realized through a shuttle valve communicated between a left rotation pilot oil way and a right rotation pilot oil way, a pressure switch is arranged on the control oil way of the shuttle valve communicated to a rotation oil tank valve and is used for detecting any pressure change of the left rotation pilot oil way and the right rotation pilot oil way, and whether the rotation acts or not is judged by combining the closing or disconnecting time of the pressure switch so as to adjust the power of a main pump. The problem that the rotation of the hydraulic system is blocked due to the fact that the control system mistakenly considers that the engineering machine stops rotating and quits the power regulation of the main pump after the engineering machine rotates to enter a uniform speed state and the rotating speed is rapidly reduced is solved.
Description
Technical Field
The invention relates to a control method for avoiding rotation clamping stagnation of engineering machinery, and belongs to the technical field of engineering machinery.
Background
At present, whether the excavator rotates or not is judged through the pressure of a main pump, and the excavator is difficult to distinguish whether the main pump works or not due to the fact that the pressure of the main pump is low in the uniform rotation process.
After the excavator enters a uniform speed state when doing single rotation, because the overcome resistance is small, the pressure of the main pump is small, at the moment, the control system can mistakenly think that the excavator stops the rotation and quits the power regulation of the main pump, at the moment, the control system reduces the power of the main pump, so that the rotation speed is rapidly reduced, and the rotation jamming problem of the excavator hydraulic system is caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a control method for avoiding the rotation jamming of engineering machinery.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a control method for avoiding the rotation jamming of engineering machinery is characterized in that a control oil way controls the rotation direction through a rotation pilot oil way, a rotation priority state is realized through a shuttle valve communicated between a left rotation pilot oil way and a right rotation pilot oil way, a pressure switch is arranged on the control oil way leading to a rotation oil tank valve through the shuttle valve and used for detecting any pressure change of the left rotation pilot oil way and the right rotation pilot oil way, and whether rotation acts or not is judged according to the closing or disconnecting time of the pressure switch so as to adjust the power of a main pump.
Further, when the pressure switch detects any pressure change of the left and right rotary pilot oil passages, the pressure switch is closed.
Further, when the pilot handle is operated to be positioned at the left position or the right position, the left-right rotary pilot oil path or the right-left rotary pilot oil path generates pressure change.
Further, in the single-rotation state, when the closing duration of the pressure switch reaches 50 ms-200 ms, the pump power adjusting process is started, and the power of the main pump in the current state is maintained.
Furthermore, when the pressure of the left and right rotary pilot oil passages is not changed, the pressure switch is switched off.
Furthermore, when the pilot handle is positioned at the middle position, the left-right rotary pilot oil path and the right-left rotary pilot oil path have no pressure change.
Further, in the single-rotation state, when the disconnection duration time of the pressure switch reaches 1 s-4 s, the main pump power adjusting process is quitted, and the main pump power is reduced to the minimum.
The invention achieves the following beneficial effects:
the invention discloses a control method for avoiding the jamming of the rotation of an engineering machine, which is characterized in that a pressure switch is arranged on a control oil path leading to a rotary oil tank valve by a shuttle valve and is used for detecting any pressure change of a left rotary pilot oil path and a right rotary pilot oil path, whether the rotation acts or not is judged by combining the closing or breaking time of the pressure switch, the power adjustment of a main pump is carried out, and the problem that the rotation speed is rapidly reduced and the jamming of the rotation of a hydraulic system is caused because a control system mistakenly considers that the engineering machine stops the rotation action and quits the power adjustment of the main pump after the rotation of the engineering machine.
Drawings
FIG. 1 is a flowchart of a control method of the present embodiment;
fig. 2 is a schematic diagram of the hydraulic system of the present embodiment.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Referring to fig. 1 and 2, when the excavator is performing a swing operation, the control oil path controls a swing direction through the swing pilot oil path, a swing priority state is realized through a shuttle valve S communicated between the left and right swing pilot oil paths, and a pressure switch K is installed on a control oil path B15 leading to the swing priority valve behind the shuttle valve S, and is used for detecting a pressure change of any one of the left and right swing pilot oil paths B14 and B16, and further judging whether the swing operation is performed in combination with the closing or opening time of the pressure switch K, so as to adjust the power of the main pump.
When the pilot handle is operated to be positioned at the left position or the right position, any pressure change of the left and right rotary pilot oil passages B14 and B16 is caused, and when the pressure switch K detects any pressure change of the left and right rotary pilot oil passages B14 and B16, the pressure switch K is closed. In a single-rotation state, when the closing duration of the pressure switch K reaches 50 ms-200 ms (to avoid interference and misoperation), the control system judges and determines the rotation action of the excavator, and enters a main pump power adjusting process to keep the original power of the main pump in the current state, so that the rotation clamping stagnation problem is avoided.
When the pilot handle is positioned at the middle position, the left and right rotary pilot oil passages B14 and B16 have no pressure change, and the pressure switch is switched off. Under the single-rotation state, when the disconnection duration time of the pressure switch K reaches 1 s-4 s (to avoid interference and misoperation), the control system judges that the excavator has no rotation action, exits the main pump power adjusting process and reduces the main pump power to the minimum.
In the present embodiment, the method is described by taking a hydraulic excavator as an example, and those skilled in the art will appreciate that the method is also applicable to other hydraulic-driven construction machines having a swing function.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A control method for avoiding the rotation jamming of engineering machinery is characterized in that a control oil way controls the rotation direction through a rotation pilot oil way, a rotation priority state is realized through a shuttle valve communicated between a left rotation pilot oil way and a right rotation pilot oil way, a pressure switch is arranged on the control oil way of the shuttle valve communicated to a rotation oil tank valve and used for detecting any pressure change of the left rotation pilot oil way and the right rotation pilot oil way, and whether the rotation acts or not is judged according to the closing or disconnecting time of the pressure switch so as to adjust the power of a main pump.
2. The control method for avoiding the slewing jamming of the construction machinery as claimed in claim 1, wherein the pressure switch is turned off when the pressure switch detects any pressure change of the left and right slewing pilot oil paths.
3. The control method for avoiding the slewing jamming of the construction machine according to claim 2, wherein the pilot handle is operated to change the pressure in the left or right slewing pilot oil path or the right slewing pilot oil path.
4. The control method for avoiding the slewing jamming of the engineering machinery as claimed in claim 2, wherein in the single-slewing state, when the closing duration of the pressure switch reaches 50ms to 200ms, the pump power regulation process is started, and the current state power of the main pump is maintained.
5. The control method for avoiding the slewing jamming of the construction machinery as claimed in claim 1, wherein the pressure switch is turned off when there is no pressure change in both the left and right slewing pilot oil paths.
6. The control method for avoiding the slewing jamming of the construction machinery as claimed in claim 5, wherein when the pilot handle is located at the middle position, no pressure change exists in both the left and right slewing pilot oil passages and the right slewing pilot oil passage.
7. The control method for avoiding the rotation jamming of the engineering machinery as claimed in claim 5, wherein in the single-rotation state, when the off-duration time of the pressure switch reaches 1 s-4 s, the process of regulating the power of the main pump is exited, and the power of the main pump is reduced to the minimum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010748696.1A CN111809684A (en) | 2020-07-30 | 2020-07-30 | Control method for avoiding rotation jamming of engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010748696.1A CN111809684A (en) | 2020-07-30 | 2020-07-30 | Control method for avoiding rotation jamming of engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111809684A true CN111809684A (en) | 2020-10-23 |
Family
ID=72864385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010748696.1A Pending CN111809684A (en) | 2020-07-30 | 2020-07-30 | Control method for avoiding rotation jamming of engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111809684A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62160324A (en) * | 1986-01-09 | 1987-07-16 | Yutani Juko Kk | Free-slewing system of oil-pressure shovel |
| JPH0288825A (en) * | 1988-09-26 | 1990-03-29 | Yutani Heavy Ind Ltd | Hydraulic circuit of construction machinery |
| JPH09273504A (en) * | 1996-04-05 | 1997-10-21 | Sumitomo Constr Mach Co Ltd | Swing system hydraulic circuit for construction machine |
| JP2002115273A (en) * | 2000-10-10 | 2002-04-19 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Slewing controller for construction machinery |
| CN101070707A (en) * | 2007-05-29 | 2007-11-14 | 三一重机有限公司 | Digger revolving-control method and system |
-
2020
- 2020-07-30 CN CN202010748696.1A patent/CN111809684A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62160324A (en) * | 1986-01-09 | 1987-07-16 | Yutani Juko Kk | Free-slewing system of oil-pressure shovel |
| JPH0288825A (en) * | 1988-09-26 | 1990-03-29 | Yutani Heavy Ind Ltd | Hydraulic circuit of construction machinery |
| JPH09273504A (en) * | 1996-04-05 | 1997-10-21 | Sumitomo Constr Mach Co Ltd | Swing system hydraulic circuit for construction machine |
| JP2002115273A (en) * | 2000-10-10 | 2002-04-19 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Slewing controller for construction machinery |
| CN101070707A (en) * | 2007-05-29 | 2007-11-14 | 三一重机有限公司 | Digger revolving-control method and system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201023 |