CN111305311A - Energy-saving hydraulic transmission system of excavator - Google Patents
Energy-saving hydraulic transmission system of excavator Download PDFInfo
- Publication number
- CN111305311A CN111305311A CN202010235519.3A CN202010235519A CN111305311A CN 111305311 A CN111305311 A CN 111305311A CN 202010235519 A CN202010235519 A CN 202010235519A CN 111305311 A CN111305311 A CN 111305311A
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- CN
- China
- Prior art keywords
- engine
- pilot
- control handle
- controller
- valve
- 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
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- 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
- E02F9/2246—Control of prime movers, e.g. depending on the hydraulic load of work tools
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
Abstract
The invention relates to an energy-saving hydraulic transmission system of an excavator in the field of engineering machinery, which comprises an oil tank, an engine, a main pump, a pilot control handle, a main valve, an air conditioner controlled by the engine and a controller, wherein the controller is connected with the main pump; the engine is provided with an engine electromagnetic valve for controlling the starting and stopping states of the engine, and the pilot control handle is set as an electric control type control handle; the input end of the controller is in signal connection with a displacement sensor carried by the pilot control handle and is used for monitoring the displacement state of the pilot control handle; the output end of the controller is in signal connection with the engine electromagnetic valve and outputs a starting or stopping signal to the engine electromagnetic valve when the pilot control handle is opened or stopped. The problem of energy waste caused by keeping the air conditioner running when the excavator is in standby is solved.
Description
Technical Field
The invention relates to the field of engineering machinery, in particular to a hydraulic transmission system of an excavator.
Background
In general, during a main work of an excavator, an engine is operated at a high speed to supply energy to a hydraulic main pump, and a main valve is operated under the control of a hydraulic pilot handle to drive an excavator boom cylinder, an arm cylinder, a bucket cylinder, and a swing motor to operate, thereby controlling work such as excavation of the excavator.
The pilot pump is a pump which is started before the main pump when the pilot pump is started, and provides pressure oil for a control system in a hydraulic system, so that the main pump can be safely started, and the whole hydraulic system can work normally.
Generally, the proportion of the time of the excavator in the standby working condition to the whole operation time of the excavator is about 5-10%. If the excavator has no excavation operation for a long time, the engine can reduce the rotating speed to enable the engine to enter a low rotating speed area for standby operation, so that the air conditioner can be kept running continuously, and the comfortable temperature of a driver cab is ensured. When the excavator is in standby, the main pump has certain load and flow due to the response speed requirement of the hydraulic system, so that in order to save energy, when the system detects that the standby working condition occurs, the rotating speed of the engine is reduced to continuously maintain the operation of the air conditioner, and the energy loss is reduced.
Although the energy loss of the standby working condition of the excavator can be reduced, in actual work, the air conditioner is not required to be operated all the time even under the standby working condition, for example, the air conditioner is not required to be operated all the time in the excavation and loading operation of earth and rock in the middle region of China in spring and autumn, and the problem of energy waste caused by keeping the air conditioner operated when the excavator is in standby is solved.
Disclosure of Invention
The invention aims to provide an energy-saving hydraulic transmission system of an excavator, which aims to solve the problem of energy waste caused by keeping an air conditioner running when the excavator is in a standby state.
The purpose of the invention is realized as follows: an energy-saving hydraulic transmission system of an excavator comprises an oil tank, an engine, a main pump, a pilot control handle, a main valve, an air conditioner controlled by the engine and a controller;
the engine is provided with an engine electromagnetic valve for controlling the starting and stopping states of the engine, and the pilot control handle is set to be an electric control type control handle;
the input end of the controller is in signal connection with a displacement sensor carried by the pilot control handle and is used for monitoring the displacement state of the pilot control handle;
the output end of the controller is in signal connection with the electromagnetic valve of the engine and outputs a starting or stopping signal to the electromagnetic valve of the engine when the pilot control handle is opened or stopped.
Furthermore, a pilot electric control valve is arranged on an oil path of the pilot pump to the main valve, and the output end of the controller is in signal connection with the pilot electric control valve and outputs a starting or stopping signal to the pilot electric control valve when the pilot control handle is opened or stopped.
Furthermore, the pilot control handle forms a synchronous control connection relationship with the pilot electric control valve and the engine electromagnetic valve through the controller.
Further, the power output end of the engine is in synchronous transmission fit with a driving element of the air conditioner.
The invention has the beneficial effects that:
1. when the standby working condition of the excavator is generated, the controller receives a signal sent by the displacement sensor in the pilot control handle, judges whether the air conditioner needs to be maintained by continuously operating the engine, and closes the engine if the air conditioner does not need to be continuously started, so that the air conditioner is closed, and the energy loss of the standby working condition is further reduced;
2. the system response is quick, the pilot control handle forms a synchronous control connection relation with the pilot electric control valve and the engine electromagnetic valve through the controller, the whole system can be quickly started or stopped, the control synchronism is enabled to be optimal, and the running efficiency of the whole system is improved.
Drawings
Fig. 1 is a schematic system layout.
In the figure, 1 main valve, 2 boom cylinders, 3 arm cylinders, 4 bucket cylinders, 5 rotary motors, 6 pilot control handles, 7 controllers, 8 pilot electric control valves, 9 pilot pumps, 10 oil tanks, 11 main pumps, 12 engine electromagnetic valves, 13 engines and 14 air conditioners.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
As shown in fig. 1, the energy-saving hydraulic transmission system of the excavator comprises an oil tank 10, an engine 13, a main pump 11, a pilot pump 9, a pilot control handle 6, a main valve 1 and an air conditioner 14 controlled by the engine 13.
As is known in the art, when the excavator is operated, the pilot pump 9 is started before the main pump 11, so that hydraulic oil can be distributed to the boom cylinder 2, the arm cylinder 3, the bucket cylinder 4, and the swing motor 5 through the main valve 1, and the pressure of the hydraulic transmission system is in a normal state.
The system further comprises a controller 7.
The engine 13 is provided with an engine electromagnetic valve 12 for controlling the starting and stopping states of the engine, and the pilot control handle 6 is arranged as an electric control type control handle and is provided with a displacement sensor.
The input end of the controller 7 is in signal connection with a displacement sensor of the pilot control handle 6 and is used for monitoring the displacement state of the pilot control handle 6.
The output end of the controller 7 is in signal connection with the engine electromagnetic valve 12 and outputs a start or stop signal to the engine electromagnetic valve 12 when the pilot control handle 6 is opened or stopped.
The oil path of the pilot pump 9 to the main valve 1 is provided with a pilot electric control valve 8, the output end of the controller 7 is in signal connection with the pilot electric control valve 8, and a start or stop signal is output to the pilot electric control valve 8 when the pilot control handle 6 is opened or stopped.
The pilot control handle 6 is in synchronous control connection with a pilot electric control valve 8 and an engine electromagnetic valve 12 through a controller 7.
The power output end of the engine 13 is synchronously matched with a driving element (compressor) of the air conditioner 14 in a transmission way.
The specific principle is as follows: a displacement sensor (a common electric control handle is provided with the displacement sensor) is arranged in the pilot control handle 6 and is used for detecting a displacement signal generated when the pilot control handle 6 controls the excavating operation of the excavator, when the pilot control handle 6 is pulled to a working position, each part of the excavator starts to work, correspondingly, the engine 13 and the pilot electric control valve 8 start to be started, and when the pilot control handle 6 is pulled to a closing position, the engine 13 and the pilot electric control valve 8 are in a stop state; the pilot of the main valve 1 is driven by a pilot electric control valve 8.
When the air conditioner 14 needs to be turned off: when the controller 7 receives a signal for closing the hydraulic system sent by a displacement sensor in the pilot control handle 6 (the pilot control handle 6 is pulled to the closing position, so that the displacement sensor inside the pilot control handle 6 can detect a corresponding closing signal), the controller 7 controls the engine electromagnetic valve 12 to close the engine 13 after receiving the closing signal, and further closes the air conditioner 14.
When the controller 7 receives an action signal for starting the hydraulic system sent by a displacement sensor in the pilot control handle 6, the controller 7 controls the engine electromagnetic valve 12 to start the engine 13 on the premise of ensuring the operation response speed, so that the energy consumption loss under the standby working condition of the excavator can be further reduced.
While the preferred embodiments of the present invention have been described, those skilled in the art will appreciate that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. The utility model provides an energy-conserving hydraulic transmission system of excavator, includes oil tank (10), engine (13), main pump (11), pilot pump (9), pilot control handle (6), main valve (1) and receive air conditioner (14) of engine (13) control, its characterized in that: also comprises a controller (7);
the engine (13) is provided with an engine electromagnetic valve (12) for controlling the starting and stopping states of the engine, and the pilot control handle (6) is arranged as an electric control type control handle;
the input end of the controller (7) is in signal connection with a displacement sensor arranged on the pilot control handle (6) and is used for monitoring the displacement state of the pilot control handle (6);
the output end of the controller (7) is in signal connection with the engine electromagnetic valve (12) and outputs a starting or stopping signal to the engine electromagnetic valve (12) when the pilot control handle (6) is opened or stopped.
2. The energy-saving hydraulic transmission system of the excavator according to claim 1, wherein: the oil circuit of the pilot pump (9) communicated with the main valve (1) is provided with a pilot electric control valve (8), the output end of the controller (7) is in signal connection with the pilot electric control valve (8) and outputs a starting or stopping signal to the pilot electric control valve (8) when the pilot control handle (6) is opened or stopped.
3. The energy-saving hydraulic transmission system of the excavator according to claim 2, wherein: the pilot control handle (6) forms a synchronous control connection relationship with the pilot electric control valve (8) and the engine electromagnetic valve (12) through the controller (7).
4. The energy-saving hydraulic transmission system of the excavator according to claim 3, wherein: and the power output end of the engine (13) is in synchronous transmission fit with a driving element of the air conditioner (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010235519.3A CN111305311A (en) | 2020-03-30 | 2020-03-30 | Energy-saving hydraulic transmission system of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010235519.3A CN111305311A (en) | 2020-03-30 | 2020-03-30 | Energy-saving hydraulic transmission system of excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111305311A true CN111305311A (en) | 2020-06-19 |
Family
ID=71159009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010235519.3A Pending CN111305311A (en) | 2020-03-30 | 2020-03-30 | Energy-saving hydraulic transmission system of excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111305311A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116696874A (en) * | 2023-08-04 | 2023-09-05 | 华侨大学 | Variable-rotating-speed differential pressure regulation load sensitive system and engineering machinery thereof |
-
2020
- 2020-03-30 CN CN202010235519.3A patent/CN111305311A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116696874A (en) * | 2023-08-04 | 2023-09-05 | 华侨大学 | Variable-rotating-speed differential pressure regulation load sensitive system and engineering machinery thereof |
| CN116696874B (en) * | 2023-08-04 | 2023-12-12 | 华侨大学 | Variable-rotating-speed differential pressure regulation load sensitive system and engineering machinery thereof |
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