CN108978771A - Hydraulic slewing system and excavator - Google Patents
Hydraulic slewing system and excavator Download PDFInfo
- Publication number
- CN108978771A CN108978771A CN201810682944.XA CN201810682944A CN108978771A CN 108978771 A CN108978771 A CN 108978771A CN 201810682944 A CN201810682944 A CN 201810682944A CN 108978771 A CN108978771 A CN 108978771A
- Authority
- CN
- China
- Prior art keywords
- rotary motor
- revolution
- hydraulic
- solenoid valve
- controller
- 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.)
- Pending
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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
- 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
- E02F9/225—Control of steering, e.g. for hydraulic motors driving the vehicle tracks
-
- 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
- E02F9/2267—Valves or distributors
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The present invention relates to excavators, to solve the problems, such as that existing excavator is likely to occur rotary motor revolution hypervelocity in slope surface operation；A kind of excavator Hydraulic slewing system is provided, including rotary motor, revolution control bound, pilot valve, controller, speed probe, solenoid valve connected to the controller is provided on two-way connection oil circuit between pilot valve and the guide's hydraulic control end for turning round control bound both ends, when the revolving speed of rotary motor is more than preset value, the revolving speed that controller exports control signal to solenoid valve and the pilot pressure for being transmitted to revolution control bound guide hydraulic control end is made to decrease up to rotary motor is less than preset value.In the present invention; when rotary motor turns round hypervelocity under the aid of scraper bowl and load effect; reduce the pilot pressure for being transmitted to revolution control bound guide hydraulic control end, reduce the revolving speed of rotary motor, thus may damage caused by protecting rotary motor to avoid rotary motor overspeed rotation.
Description
Technical field
The present invention relates to a kind of Hydraulic slewing systems, more specifically to a kind of Hydraulic slewing system and excavator.
Background technique
Excavator is made of lower running mechanism and the upper body being pivotally mounted on lower running mechanism, top vehicle
The revolution of body is driven by rotary motor.When excavator is in grading operation, the revolution of upper body not will lead to upper body
Center of gravity variation in height, the center of gravity of upper body moves in the horizontal plane.The power of excavator upper body revolution is complete
Portion come from rotary motor, therefore rotary motor be not in revolving speed it is too fast and occur revolution hypervelocity rotary motor oil extraction end superpressure and
Phenomena such as rotary motor oil inlet end is emptied.
But excavator is known as the good reputation of the king of engineering machinery, is suitble to various operating conditions, and wherein half way up the mountain operation is a kind of relatively normal
See operating condition.Different from level ground, when excavator is when half way up the mountain is turned round, the center of gravity of upper body is in one and horizontal plane
It moves in plane in a certain angle, if bucket load is heavier or the scraper bowl radius of gyration is larger, is brought by body sway angle
Gravitional force influence, the rotary inertia of upper mechanism also will increase, when power shovel can add from height toward speed when low revolution
Fastly, it is possible to will appear phenomena such as revolution hypervelocity, rotary motor oil extraction end superpressure and rotary motor oil inlet end are emptied, motor is made
Serious harm is generated with the service life.
Summary of the invention
The technical problem to be solved by the present invention is to return for existing excavator in the rotary motor that slope surface operation is likely to occur
The problem of turning hypervelocity, and a kind of Hydraulic slewing system and excavator are provided, avoid excavator in slope surface operation because of scraper bowl and object
Its potential energy accelerates the phenomenon that rotational speed causes rotary motor hypervelocity, superpressure and is emptied appearance when material returns back to lower from eminence,
Rotary motor is avoided therefore to lead to the problem of damage and the lost of life.
The present invention is to realize that the technical solution of its purpose is such that provide a kind of Hydraulic slewing system, including revolution horse
It reaches, connect the revolution control bound for controlling rotary motor, guide's hydraulic control with revolution control bound both ends with rotary motor
The pilot valve for holding connection, the oil pumping system being connect with revolution control bound；It is connect it is characterized by comprising controller, with controller
For measuring the speed probe of rotary motor revolving speed, guide's hydraulic control end of the pilot valve and the revolution control bound both ends
Between two-way connection oil circuit on be provided with solenoid valve, the automatically controlled end of the solenoid valve is connect with the controller, works as revolution
When the revolving speed of motor is more than preset value, the controller, which exports control signal to the solenoid valve, to be made to be transmitted to revolution control bound
The revolving speed that the pilot pressure at guide's hydraulic control end decreases up to rotary motor is less than preset value.In the present invention, when revolution hydraulic pressure system
System is applied to excavator and excavator when slope surface makees revolution movement, when rotary motor makes under the aid of scraper bowl and load effect
Its revolving speed is more than design value (preset value), and controller exports control signal to solenoid valve, and solenoid valve reduction is transmitted to revolution control
The pilot pressure at main valve guide's hydraulic control end, the valve port opening for turning round control bound reduce, and reduce the flow into rotary motor,
Return oil pressure increases, and the revolving speed of rotary motor reduces, and makes rotary motor revolving speed no more than default maximum (top) speed.To protect
Rotary motor may damage caused by avoiding rotary motor overspeed rotation.
Above-mentioned excavator Hydraulic slewing system, the solenoid valve are switching mode solenoid valve, or are proportional-type solenoid valve.It adopts
With proportional-type solenoid valve, can Linear Control rotary motor oil outlet back pressure ranges, control program is more flexible.
The present invention is to realize that the technical solution of its purpose is such that provide a kind of excavator, has excavator above-mentioned
Hydraulic slewing system.
Compared with prior art, the present invention the maximum (top) speed of intelligent control rotary motor of the present invention, it is super to avoid the occurrence of revolution
Speed and is emptied superpressure, extends rotary motor service life.
Detailed description of the invention
Fig. 1 is the schematic diagram of excavator Hydraulic slewing system of the present invention.
Parts title and serial number in figure:
Hydraulic oil container 1, oil pump 2, revolution control bound 3, rotary motor 4, pilot valve 5, controller 6, speed probe 7,
Solenoid valve 8.
Specific embodiment
Illustrate specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, the Hydraulic slewing system in the present embodiment is used for excavator comprising rotary motor 4 and revolution horse
Up to 4 connections for controlling the revolution control bound 3 of rotary motor 4, being connect with the guide's hydraulic control end for turning round 3 both ends of control bound
Pilot valve 5, controller 6, is connect with controller 6 for measuring rotary motor turn oil pumping system connect with revolution control bound 3
The speed probe 7 of speed；Oil pumping system includes oil pump 2 and hydraulic oil container 1, oil pump 2 from hydraulic oil container 1 draw oil and from
Pumping hole output, it is dynamic required for the revolution of excavator upper body to provide by revolution control bound 3 to 4 fuel feeding of rotary motor
Power.Pilot valve 5 exports different pilot control pressure, and the valve port opening of control revolution control bound is small, and then controls and enter
Flow in rotary motor realizes the revolving speed control of rotary motor.
It is provided on two-way connection oil circuit between pilot valve 5 and guide's hydraulic control end at revolution 3 both ends of control bound
Solenoid valve 8, solenoid valve 8 can be switching mode solenoid valve, be also possible to proportional-type solenoid valve, can according to proportional-type solenoid valve
Linear Control rotary motor oil outlet back pressure ranges, control program are more flexible.
In the case where pilot valve 5 exports an equal amount of pilot control pressure, excavator is returned when level land is turned round
The revolving speed for turning motor will not exceed the speed limit, and revolving speed is in its scope of design.But when excavator is when slope surface operation is turned round, shoveling
Under the aid for struggling against and loading gravitional force when returning back to lower by eminence, the revolving speed of rotary motor 4 can exceed that it allowed
Maximum value.If the revolving speed of rotary motor 4 is more than the maximum value (preset value) allowed, its revolving speed is converted electricity by speed probe 7
The electric signal and preset value are compared and are determined that the revolving speed of rotary motor is more than preset value, controller 6 by signal, controller 6
Control signal is exported to solenoid valve, reduces the pilot pressure for being transmitted to revolution control bound guide hydraulic control end, solenoid valve reduces
It is transmitted to the pilot pressure at revolution control bound guide hydraulic control end, the valve port opening for turning round control bound reduces, and makes to enter revolution
The flow of motor is reduced, and return oil pressure increases, and the revolving speed of rotary motor reduces, and makes rotary motor revolving speed no more than default maximum
Revolving speed.Thus may damage caused by protecting rotary motor to avoid rotary motor overspeed rotation.When the revolving speed of rotary motor
When less than preset value, controller output signal makes solenoid valve be returned to original state, and the pilot pressure signal of pilot valve output can
To be insusceptibly transferred to guide's hydraulic control end of revolution control bound, make driver such as the manipulation identically controlled digging of conventional excavators
The revolution of pick machine acts.The maximum (top) speed of intelligent control rotary motor of the present invention avoids the occurrence of revolution hypervelocity, superpressure and is emptied,
Extend rotary motor service life.
Claims (4)
1. a kind of Hydraulic slewing system connect the revolution control for controlling rotary motor including rotary motor, with rotary motor
Main valve, the pilot valve being connect with guide's hydraulic control end at revolution control bound both ends, the oil pumping system being connect with revolution control bound；
The speed probe for measuring rotary motor revolving speed, the pilot valve are connect it is characterized by comprising controller, with controller
Two-way between guide's hydraulic control end at the revolution control bound both ends, which is connect on oil circuit, is provided with solenoid valve, the electromagnetism
The automatically controlled end of valve is connect with the controller, and when the revolving speed of rotary motor is more than preset value, the controller is to the electromagnetism
Valve output control signal makes to be transmitted to the revolving speed that the pilot pressure for turning round control bound guide hydraulic control end decreases up to rotary motor
Less than preset value.
2. Hydraulic slewing system according to claim 1, it is characterised in that the solenoid valve is switching mode solenoid valve.
3. Hydraulic slewing system according to claim 1, it is characterised in that the solenoid valve is proportional-type solenoid valve.
4. a kind of excavator, it is characterised in that including Hydraulic slewing system described in any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810682944.XA CN108978771A (en) | 2018-06-28 | 2018-06-28 | Hydraulic slewing system and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810682944.XA CN108978771A (en) | 2018-06-28 | 2018-06-28 | Hydraulic slewing system and excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108978771A true CN108978771A (en) | 2018-12-11 |
Family
ID=64538667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810682944.XA Pending CN108978771A (en) | 2018-06-28 | 2018-06-28 | Hydraulic slewing system and excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108978771A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485506A (en) * | 2019-08-19 | 2019-11-22 | 徐州徐工矿业机械有限公司 | Super-tonnage excavator and its rotary braking and repairing hydraulic system, method |
| CN114687405A (en) * | 2020-12-28 | 2022-07-01 | 柳州柳工挖掘机有限公司 | Excavator slope rotation positioning control system and control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437393A (en) * | 2013-08-30 | 2013-12-11 | 华南理工大学 | Rotation energy saving system of hydraulic excavator |
| CN103518021A (en) * | 2011-05-02 | 2014-01-15 | 神钢建设机械株式会社 | Rotation-type working machine |
| CN103562565A (en) * | 2011-05-25 | 2014-02-05 | 神钢建设机械株式会社 | Rotary work machine |
| EP2826920A1 (en) * | 2013-07-18 | 2015-01-21 | Kobelco Construction Machinery Co., Ltd. | Hybrid construction machine |
| CN106703110A (en) * | 2017-03-02 | 2017-05-24 | 柳州柳工挖掘机有限公司 | Intelligent shock absorption hydraulic control method and control system of excavator |
| US20170314234A1 (en) * | 2015-05-22 | 2017-11-02 | Philip Paull | Valve systems and method for enhanced grading control |
-
2018
- 2018-06-28 CN CN201810682944.XA patent/CN108978771A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103518021A (en) * | 2011-05-02 | 2014-01-15 | 神钢建设机械株式会社 | Rotation-type working machine |
| CN103562565A (en) * | 2011-05-25 | 2014-02-05 | 神钢建设机械株式会社 | Rotary work machine |
| EP2826920A1 (en) * | 2013-07-18 | 2015-01-21 | Kobelco Construction Machinery Co., Ltd. | Hybrid construction machine |
| CN103437393A (en) * | 2013-08-30 | 2013-12-11 | 华南理工大学 | Rotation energy saving system of hydraulic excavator |
| US20170314234A1 (en) * | 2015-05-22 | 2017-11-02 | Philip Paull | Valve systems and method for enhanced grading control |
| CN106703110A (en) * | 2017-03-02 | 2017-05-24 | 柳州柳工挖掘机有限公司 | Intelligent shock absorption hydraulic control method and control system of excavator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485506A (en) * | 2019-08-19 | 2019-11-22 | 徐州徐工矿业机械有限公司 | Super-tonnage excavator and its rotary braking and repairing hydraulic system, method |
| CN114687405A (en) * | 2020-12-28 | 2022-07-01 | 柳州柳工挖掘机有限公司 | Excavator slope rotation positioning control system and control method |
| CN114687405B (en) * | 2020-12-28 | 2023-04-18 | 柳州柳工挖掘机有限公司 | Excavator slope rotation positioning control system and control method |
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