CN110747934A - Rotary energy-saving device of electric hydraulic excavator - Google Patents
Rotary energy-saving device of electric hydraulic excavator Download PDFInfo
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- CN110747934A CN110747934A CN201911017835.7A CN201911017835A CN110747934A CN 110747934 A CN110747934 A CN 110747934A CN 201911017835 A CN201911017835 A CN 201911017835A CN 110747934 A CN110747934 A CN 110747934A
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- recovery
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- 238000011084 recovery Methods 0.000 claims abstract description 29
- 239000003921 oil Substances 0.000 description 29
- 238000010276 construction Methods 0.000 description 11
- 239000010720 hydraulic oil Substances 0.000 description 8
- 230000008859 change Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
-
- 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
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
- E02F9/12—Slewing or traversing gears
- E02F9/121—Turntables, i.e. structure rotatable about 360°
- E02F9/123—Drives or control devices specially adapted therefor
-
- 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
- E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
-
- 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
-
- 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
-
- 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
- E02F9/2278—Hydraulic circuits
- E02F9/2292—Systems with two or more pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention discloses a rotary energy-saving device of an electric hydraulic excavator, wherein a recovery motor is connected with a generator, the generator is electrically connected with a frequency converter, the frequency converter is electrically connected with a battery, the frequency converter is electrically connected with a motor, the motor is connected with a main pump, the main pump is connected with an oil tank A, the oil tank A is connected with a rotary motor through a main valve, the main valve is connected with a controller, two ends of the rotary motor are respectively connected with a one-way valve A and a one-way valve B, the one-way valve A and the one-way valve B are communicated, the one-way valve A is connected with an overflow valve A in parallel, and the one-way valve B is connected with an overflow valve B in parallel.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a rotary energy-saving device of an electric hydraulic excavator.
Background
The engineering machinery is an important component of equipment industry, is generally called as engineering machinery as mechanical equipment necessary for comprehensive mechanical construction engineering required by earth and stone construction engineering, pavement construction and maintenance, mobile hoisting, loading and unloading operation and various construction engineering, and is mainly used in the fields of national defense construction engineering, traffic transportation construction, energy industry construction and production, raw material industry construction and production of mines and the like, agriculture and forestry water conservancy construction, industrial and civil construction, urban construction, environmental protection and the like.
The hydraulic excavator generates great energy waste during starting and stopping in the rotation process, hydraulic oil flows into an oil tank through an overflow valve, the hydraulic energy is converted into heat energy, the oil temperature is increased, the recovery of the energy has practical significance, the hydraulic excavator is started, the inlet pressure of a rotary motor is increased because a loading rotary mechanism does not normally rotate, when the pressure of the overflow valve is reached, the hydraulic oil flows to the oil tank through the overflow valve, the energy waste is caused, when the hydraulic excavator stops, the outlet pressure is increased under the inertia effect of the loading rotary mechanism, when the pressure of the overflow valve is reached, the hydraulic oil flows to the oil tank through the overflow valve, the energy waste is caused, and the energy consumption is increased.
Therefore, the device for recovering the energy of the hydraulic excavator during the rotation starting and stopping is designed, the energy utilization rate is improved, the controllability during the energy recovery is improved, the structure is simple, and the recovery mode can be opened and closed, and the device is the problem to be solved by the inventor.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a rotary energy-saving device of an electric hydraulic excavator, which can realize the functions of recovering the energy of the hydraulic excavator when the rotation is started and stopped, improving the energy utilization rate and improving the controllability during energy recovery, has a simple structure and can open and close the recovery mode.
The technical scheme adopted by the invention for solving the technical problems is as follows: a rotary energy-saving device of an electric hydraulic excavator comprises a recovery motor, a generator, a frequency converter, a battery, an electric motor, a main pump, an oil tank A, a controller, a main valve, an oil tank B, a two-position four-way reversing valve A, a two-position two-way electromagnetic valve A, a one-way valve A, an overflow valve A, an oil tank C, an overflow valve B, a rotary motor, a one-way valve B, a two-position two-way electromagnetic valve B, a two-position four-way reversing valve B and an oil tank D, wherein the recovery motor is connected with the generator, the generator is electrically connected with the frequency converter, the frequency converter is electrically connected with the battery, the frequency converter is electrically connected with the electric motor, the electric motor is connected with the main pump, the main pump is connected with the oil tank A, the oil tank A is connected with the rotary motor through the main valve, the main, the check valve A and the check valve B are communicated with each other, the check valve A is connected with an overflow valve A in parallel, the check valve B is connected with an overflow valve B in parallel, the overflow valve A and the overflow valve B are communicated with each other, a pipeline communicating the overflow valve A and the overflow valve B is communicated with a pipeline communicating the check valve A and the check valve B through a pipeline, the middle part of the pipeline is connected with an oil tank C, the left end of the check valve A is connected with a two-position two-way electromagnetic valve A, the right end of the check valve B is connected with a two-position two-way electromagnetic valve B, the two-position two-way electromagnetic valve A is connected with a two-position four-way reversing valve A, the two-position two-way electromagnetic valve B is connected with a two-position four-way reversing valve B, joints at the left end and the right end of the two-position, and the joint at the lower end of the two-position four-way reversing valve B is respectively connected with the oil tank D and the recovery motor in parallel.
Further, the generator is electrically connected with the recovery motor.
The invention has the beneficial effects that:
1. the hydraulic excavator can recover the energy of the hydraulic excavator when the rotation is started and stopped, convert the hydraulic energy into the electric energy to be stored in the battery, improve the energy utilization rate, add the two-position two-way electromagnetic reversing valve, the two-position four-way reversing valve and the recovery motor in the original rotation hydraulic system, and improve the controllability during energy recovery by adjusting the spring pressure on the two-position four-way reversing valve.
2. The invention has simple structure, does not change the original system greatly, can open or close the recovery mode according to the needs of users, determines the opening size of the two-position four-way valve by the pressure of the inlet and the outlet, and gradually reduces the pressure difference at two sides when the upper vehicle rotates to run stably and stops, thus leading the operation and control to be stable.
Drawings
Fig. 1 is a hydraulic schematic diagram of the present invention.
Description of reference numerals: 1-a recovery motor; 2-a generator; 3-a frequency converter; 4-a battery; 5-an electric motor; 6-main pump; 7-oil tank A; 8-a controller; 9-a main valve; 10-oil tank B; 11-a two-position four-way reversing valve A; 12-a two-position two-way solenoid valve A; 13-one-way valve a; 14-relief valve a; 15-tank C; 16-relief valve B; 17-a rotary motor; 18-one-way valve B; 19-a two-position two-way solenoid valve B; 20-two-position four-way change valve B; 21-oil tank D.
Detailed Description
The invention will now be further illustrated by reference to specific examples, which are intended to be illustrative only and not to limit the scope of the invention. Further, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents may fall within the scope of the invention as defined in the appended claims.
The first embodiment is as follows:
referring to FIG. 1, the hydraulic principle diagram of the present invention includes a recovery motor, a generator, a frequency converter, a battery, an electric motor, a main pump, an oil tank A, a controller, a main valve, an oil tank B, a two-position four-way reversing valve A, a two-position two-way solenoid valve A, a check valve A, an overflow valve A, an oil tank C, an overflow valve B, a rotary motor, a check valve B, a two-position two-way solenoid valve B, a two-position four-way reversing valve B, and an oil tank D, wherein the recovery motor is connected with the generator, the generator is electrically connected with the frequency converter, the frequency converter is electrically connected with the battery, the frequency converter is electrically connected with the electric motor, the electric motor is connected with the main pump, the main pump is connected with the oil tank A, the oil tank A is connected with the rotary motor through the main valve, the main valve is connected with the controller, the check valve, the check valve B is connected with an overflow valve B in parallel, the overflow valve A and the overflow valve B are communicated with each other, pipelines communicated with the overflow valve A and the overflow valve B are communicated with each other through pipelines, the middle part of each pipeline is connected with an oil tank C, the left end of the check valve A is connected with a two-position two-way electromagnetic valve A, the right end of the check valve B is connected with a two-position two-way electromagnetic valve B, the two-position two-way electromagnetic valve A is connected with a two-position four-way reversing valve A, the two-position two-way electromagnetic valve B is connected with a two-position four-way reversing valve B, joints at the left end and the right end of the two-position four-way reversing valve A are respectively connected with joints at the left end and the right end of the two-position four-way reversing valve B.
The generator is electrically connected with the recovery motor.
When a user starts the energy recovery mode of the invention, the two-position two-way electromagnetic valve A and the two-position two-way electromagnetic valve B are electrified, the valve core of the two-position two-way electromagnetic valve A moves to the right, the valve core of the two-position two-way electromagnetic valve B moves to the left, when the rotary motor is started (assuming that oil enters the port A and oil returns the port B), because the upper vehicle is not normally operated, the pressure at the position A is greater than that at the position B, when the pressure difference between the two positions is greater than the spring adjusting pressure, the valve core of the two-position four-way reversing valve A moves rightwards, the valve core of the two-position four-way reversing valve B moves rightwards, part of hydraulic oil passes through the valve core of the two-position two-way electromagnetic valve A and the valve core of the two-position four-way reversing valve A from the port A to drive the recovery motor to run with the generator, the hydraulic energy is converted into electric energy to be recovered, the hydraulic oil enters the oil tank through the valve core of the two-position four-way reversing, when the pressure of the port A exceeds the overflow pressure of the overflow valve A, part of the hydraulic oil flows into the oil tank through the overflow valve A.
When the rotary motor is braked, the boarding rotary mechanism continues to rotate under the action of inertia force, so that the pressure at the position B is increased, the valve core of the two-position four-way reversing valve B and the valve core of the two-position four-way reversing valve A move leftwards, hydraulic oil flows in from the valve core of the two-position two-way electromagnetic valve B and the valve core of the two-position four-way reversing valve B, the recovery motor drives the generator to recover energy, the hydraulic oil flows back to the oil tank through the two-position four-way reversing valve A, and when oil enters the position B and oil exits from the position A.
The invention recovers the energy of the hydraulic excavator when the rotation is started and stopped, converts the hydraulic energy into electric energy to be stored in the battery, improves the energy utilization rate, adds a two-position two-way electromagnetic reversing valve, a two-position four-way reversing valve and a recovery motor in the original rotation hydraulic system, improves the controllability when the energy is recovered by adjusting the spring pressure on the two-position four-way reversing valve, has simple structure, does not change the original system greatly, can open or close the recovery mode according to the needs of users, determines the opening size of the two-position four-way valve according to the inlet and outlet pressure, and gradually reduces the pressure difference at two sides when the hydraulic excavator stably runs and stops after the turning starting and the operation is stable.
Claims (2)
1. The utility model provides an electronic hydraulic shovel gyration economizer which characterized in that: the recovery system comprises a recovery motor, a generator, a frequency converter, a battery, an electric motor, a main pump, an oil tank A, a controller, a main valve, an oil tank B, a two-position four-way reversing valve A, a two-position two-way electromagnetic valve A, a one-way valve A, an overflow valve A, an oil tank C, an overflow valve B, a rotary motor, a one-way valve B, a two-position two-way electromagnetic valve B, a two-position four-way reversing valve B and an oil tank D, wherein the recovery motor is connected with the generator, the generator is electrically connected with the frequency converter, the frequency converter is electrically connected with the battery, the frequency converter is electrically connected with the electric motor, the electric motor is connected with the main pump, the main pump is connected with the oil tank A, the oil tank A is connected with the rotary motor through the main valve, the main valve is connected with the controller, two ends, the recovery device comprises a check valve A, an overflow valve B, an oil tank C, a two-position two-way electromagnetic valve A, a two-position two-way electromagnetic valve B, a two-position four-way reversing valve A, a two-position four-way reversing valve B, an oil tank D, an oil tank C, a recovery motor, an overflow valve A, an overflow valve B, an oil tank D, an oil tank C, an oil tank B, an oil tank C, an oil tank, The recovery motors are connected in parallel.
2. The slewing energy-saving device of the electric hydraulic excavator as claimed in claim 1, wherein: the generator is electrically connected with the recovery motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911017835.7A CN110747934A (en) | 2019-10-24 | 2019-10-24 | Rotary energy-saving device of electric hydraulic excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911017835.7A CN110747934A (en) | 2019-10-24 | 2019-10-24 | Rotary energy-saving device of electric hydraulic excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110747934A true CN110747934A (en) | 2020-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911017835.7A Pending CN110747934A (en) | 2019-10-24 | 2019-10-24 | Rotary energy-saving device of electric hydraulic excavator |
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| Country | Link |
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| CN (1) | CN110747934A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202007435U (en) * | 2011-03-01 | 2011-10-12 | 湖南山河智能机械股份有限公司 | Energy recovering system for excavator |
| JP2016080106A (en) * | 2014-10-20 | 2016-05-16 | 川崎重工業株式会社 | Hydraulic drive system for construction machine |
| CN106088208A (en) * | 2016-06-21 | 2016-11-09 | 柳州柳工挖掘机有限公司 | Excavator revolution hydraulic control system |
| CN211080376U (en) * | 2019-10-24 | 2020-07-24 | 山重建机有限公司 | Rotary energy-saving device of electric hydraulic excavator |
-
2019
- 2019-10-24 CN CN201911017835.7A patent/CN110747934A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202007435U (en) * | 2011-03-01 | 2011-10-12 | 湖南山河智能机械股份有限公司 | Energy recovering system for excavator |
| JP2016080106A (en) * | 2014-10-20 | 2016-05-16 | 川崎重工業株式会社 | Hydraulic drive system for construction machine |
| CN106088208A (en) * | 2016-06-21 | 2016-11-09 | 柳州柳工挖掘机有限公司 | Excavator revolution hydraulic control system |
| CN211080376U (en) * | 2019-10-24 | 2020-07-24 | 山重建机有限公司 | Rotary energy-saving device of electric hydraulic excavator |
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