CN202745096U - Hybrid power system capable of recycling potential energy of movable arm of excavator - Google Patents
Hybrid power system capable of recycling potential energy of movable arm of excavator Download PDFInfo
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- CN202745096U CN202745096U CN 201220462031 CN201220462031U CN202745096U CN 202745096 U CN202745096 U CN 202745096U CN 201220462031 CN201220462031 CN 201220462031 CN 201220462031 U CN201220462031 U CN 201220462031U CN 202745096 U CN202745096 U CN 202745096U
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Abstract
The utility model discloses a hybrid power system capable of recycling potential energy of a movable arm of an excavator. A check valve I, a transfer case, a motor, an electricity storage unit, a motor controller, a pressure sensor I, a pressure sensor II, a hydraulic motor, a clutch, a main controller and a check valve Ii are additionally arranged on the basis of the conventional excavator, wherein an engine, the motor, the hydraulic motor and a main variable pump are combined into one power system by virtue of the transfer case, when the movable arm descends, returned oil is divided into two ways, a first oil way enters the hydraulic motor and a second oil way enters the main variable pump, so as to respectively transmit power to the power system, and the motor is one with generating function. The function of generating by absorbing energy or providing driving by outputting energy is realized by controlling the motor, so that the aim of saving energy is achieved; and the hybrid power system disclosed by the utility model has the advantages of less components, small component specification and low cost.
Description
Technical field
The utility model relates to the excavation machinery dynamical system, and particularly a kind of excavator swing arm potential energy reclaims hybrid power system.
Background technology
During the conventional hydraulic descending movable arm of excavator, the decline potential energy of whole equipment is converted into heat waste by hydraulic throttle and falls, and its energy loss accounts for 20% of operation total energy consumption.Adopt at present the hybrid power scheme to be considered to effective solution.
At present, the domestic correlative study that has begun the excavator hybrid power, and some patent achievements have been proposed, its type mainly contains:
(1) oil return with the boom cylinder rodless cavity is connected with hydraulic motor, hydraulic motor-driving generator generating, the motor that power storage links to each other with motor to energy-accumulating element or driving.Maximum recirculating oil quantity when swing arm descends is near 2 times of two main pump flows, and pressure only has 1/4 of system works pressure, therefore needs to be equipped with the pump of very large specification, but can not utilize the high pressure ability of pump, and the speed fine setting maneuvering performance when swing arm descends is also bad.
(2) oil return with the boom cylinder rodless cavity connects accumulator, be difficult to be utilized but oil pressure is low, because the recirculating oil quantity of boom cylinder rodless cavity is very large, the requirement accumulator is bulky, the practical application difficulty, the return pressure of boom cylinder rodless cavity is relevant with the attitude of working device position, and the pressure variation can reach more than one times, actual accumulator coupling can only be considered by minimum pressure, and energy can not be reclaimed fully.
(3) oil return of boom cylinder rodless cavity directly drives hydraulic motor and drives hydraulic pump again in order to store accumulator into high voltage style, during use the oil of accumulator is incorporated into the outlet of main pump, this scheme use element is many, specification is large, cost is high, not only affect the control characteristic of load-sensitive pump during use, and the pressure of accumulator and the required pressure of operation oil cylinder are inconsistent, when operating pressure is high in addition the oil of accumulator can not flow out.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming and defect of prior art, provides a kind of excavator swing arm potential energy to reclaim hybrid power system, and the native system cost is low, and it is little to take up room, and maneuverability is good, does not affect the original system normal operation.
The utility model is achieved through the following technical solutions:
A kind of excavator swing arm potential energy reclaims hybrid power system, comprises fuel tank, master variable pump, motor, main reversing valve, boom cylinder, pilot control valve, one way valve I, transfer case, electric mechanical, electrical memory cell, electric machine controller, pressure sensor I, pressure sensor II, hydraulic motor, clutch, master controller, one way valve II;
The one way valve I is positioned at the master variable pump to the oil circuit of fuel tank, i.e. the outlet of one way valve I connects the master variable pump, the import connected tank;
Transfer case is connected with an end, the master variable pump of motor, motor, clutch respectively and mutually forms link gear, and hydraulic motor connects with the other end of clutch;
The P hydraulic fluid port of main reversing valve connects the master variable pump discharge, the T hydraulic fluid port of main reversing valve connects the import of hydraulic motor and connects simultaneously the one way valve I to the oil circuit between the master variable pump inlet, and the A hydraulic fluid port of main reversing valve and B hydraulic fluid port connect respectively the rod chamber of boom cylinder and the hydraulic fluid port of rodless cavity;
The pilot control valve comprises two pilot valves, and the oil-out of these two pilot valves connects respectively the hydraulic control hydraulic fluid port at main reversing valve two ends, and one of them is used for opening main reversing valve makes the oil-out of pilot valve of the rod chamber oil-feed of boom cylinder also be connected to simultaneously clutch;
Hydraulic motor oil-out connected tank;
The outlet of one way valve II connects hydraulic motor import, import connected tank;
The pressure sensor I is connected on the pilot control valve to oil circuit between the clutch;
The pressure sensor II is connected on the hydraulic motor import oil circuit;
The quantity governor of the quantity governor of master variable pump, the speed probe of motor, hydraulic motor, pressure sensor I, pressure sensor II, electric machine controller, electric memory cell are electrically connected respectively master controller; Motor is electrically connected electric machine controller, and electric machine controller is electrically connected electric memory cell.
The electricity memory cell is battery, also can be the hybrid power system that electric capacity and battery form.
Motor is generator motor, and namely motor is the motor with electricity generate function.
The utility model has the following advantages compared with prior art:
(1) oil return of boom cylinder rodless cavity is divided into two-way, receive respectively master variable pump inlet and hydraulic motor import, because the boom cylinder rodless cavity is about 2:1 with the ratio of the area of rod chamber, the oily flow that enters master variable pump and hydraulic motor respectively accounts for half, therefore the specification of hydraulic motor reduces cost with taking up room than prior art.
(2) the oil return energy of boom cylinder rodless cavity feeds back to dynamical system fully, is convenient to centralized Control, has saved to be exclusively used in the generator that movable arm potential energy reclaims, cost.
(3) main reversing valve still can be handled control to the swing arm decrease speed of excavator, handles reliable.
(4) do not use hydraulic accumulator, energy recovery rate is high, and it is little to take up room.
Description of drawings
Fig. 1 is the structural representation that the utility model excavator swing arm potential energy reclaims hybrid power system.
The specific embodiment
The utility model is further described below in conjunction with the drawings and specific embodiments, need to prove, the specific embodiment is not the restriction to the utility model protection domain.
Embodiment
As shown in Figure 1, the utility model excavator swing arm potential energy reclaims hybrid power system, comprises fuel tank 1, master variable pump 3, motor 5, main reversing valve 7, boom cylinder 8, pilot control valve 9, one way valve I 2, transfer case 4, motor 6, electric memory cell 10, electric machine controller 11, pressure sensor I 12, pressure sensor II 13, hydraulic motor 14, clutch 15, master controller 16, one way valve II 17;
One way valve I 2 is positioned at master variable pump 3 to the oil circuit of fuel tank 1, i.e. the outlet of one way valve I 2 connects master variable pump 3, import connected tank 1;
Transfer case 4 is connected with an end, the master variable pump 3 of motor 5, motor 6, clutch 15 respectively and the mutual link gear that forms; Hydraulic motor 14 connects with the other end of clutch 15;
The P hydraulic fluid port of main reversing valve 7 connects 3 outlets of master variable pump, the T hydraulic fluid port of main reversing valve 7 connects the import of hydraulic motor 14 and connects simultaneously one way valve I 2 to the oil circuit between 3 imports of master variable pump, and the A hydraulic fluid port of main reversing valve 7 and B hydraulic fluid port connect respectively the rod chamber of boom cylinder 8 and the hydraulic fluid port of rodless cavity;
Pilot control valve 9 comprises two pilot valves, the oil-out of these two pilot valves connects respectively the hydraulic control hydraulic fluid port at main reversing valve 7 two ends, and one of them oil-out that is used for opening the pilot valve (being used for the control swing arm descends) that main reversing valve makes the rod chamber oil-feed of boom cylinder also is connected to clutch 15 simultaneously;
Hydraulic motor 14 oil-out connected tanks 1;
17 outlets of one way valve II connect hydraulic motor 14 imports, import connected tank 1;
Pressure sensor I 12 is connected on pilot control valve 9 to oil circuit between the clutch 15;
Pressure sensor II 13 is connected on the hydraulic motor 14 import oil circuits;
The quantity governor of the speed probe of the quantity governor of master variable pump 3, motor 5, hydraulic motor 14, pressure sensor I 12, pressure sensor II 13, electric machine controller 11, electric memory cell 10 are electrically connected respectively master controller 16; Motor 6 is electrically connected electric machine controller 11, and electric machine controller 11 is electrically connected electric memory cell 10.
Electricity memory cell 10 is that battery also can be the hybrid power system that electric capacity and battery form.Motor 6 is generator motors, and namely motor 6 is the motor with electricity generate function.
This excavator swing arm potential energy reclaims hybrid power system, and operating principle is as follows:
When the swing arm of excavator promotes, move the handle of pilot control valve 9, the right side pilot valve is opened, promote main reversing valve 7 and enter left valve position, the oil that master variable pump 3 pumps enters the rodless cavity of boom cylinder 8, the oil of the rod chamber of boom cylinder 8 flows back to the import of hydraulic motor 14 and the import of master variable pump 3 through main reversing valve 7, because the oil inlet quantity of boom cylinder 8 is greater than recirculating oil quantity, therefore oil return does not have resistance in the import department of master variable pump 3, because hydraulic motor 14 also is in free state (clutch separation), oil return also can be through hydraulic motor 14 oil sump tanks.
When the swing arm of excavator descends, move the handle of pilot control valve 9, the left side pilot valve is opened, and promotes main reversing valve 7 and enters right valve position, and simultaneously driving clutch 15 combinations also drive hydraulic motor 14 rotations.The oil that master variable pump 3 pumps enters the rod chamber of boom cylinder 8, the rodless cavity of boom cylinder 8 is mainly compressed under Action of Gravity Field, has the oil of certain pressure (20-30% that is equivalent to operating pressure) flows back to hydraulic motor 14 imports and master variable pump 3 through main reversing valve 7 import, because the oil inlet quantity of boom cylinder 8 is less than recirculating oil quantity (rod chamber of boom cylinder 8 and the area of rodless cavity than about 1:2), therefore oil return keeps pressure in the import department of master variable pump 3, help to drive 3 rotations of master variable pump, this a part of hydraulic energy is absorbed by master variable pump 3.Another part oil return (account for total recirculating oil quantity 1/2) enters hydraulic motor 14 and is converted into driving power.
Master variable pump 3, motor 5, motor 6, hydraulic motor 14 are combined as an integral power system by transfer case 4,6 main regulating actions of motor wherein, rotating speed according to motor 5 carries out the general power adjusting, satisfying motor 5 works under best power utilization rate and minimum specific fuel consumption, when motor 5 loads increase, motor 6 outputting powers, on the contrary motor 6 generating storage power are to electric memory cell 10, motor 6 is specifically controlled by electric machine controller 11, and control requires from master controller 16.
Speed control during descending movable arm of excavator, adopt main reversing valve 7 and hydraulic motor 14 combination controls, be controlled to be the master with hydraulic motor 14 during high-speed large-flow, the oil return flow of excavator swing arm maximum falling speed equals the maximum stream flow of hydraulic motor 14 and the maximum stream flow sum of master variable pump 3.In the adjustable range of hydraulic motor 14, the control of main reversing valve 7 apertures should be satisfied the restriction loss that as far as possible reduces main reversing valve 7, and descending movable arm of excavator potential energy is mainly absorbed by master variable pump 3 and hydraulic motor 14.When descending movable arm of excavator speed hour (the oil return flow is less), then main reversing valve 7 participation speed are regulated, this moment energy consume less, preferential guarantee better handling.
When only having the excavator swing arm single movement, because recirculating oil quantity is always greater than the fuel delivery of master variable pump 3, therefore always can keep the import of master variable pump 3 and hydraulic motor 14 by regulator solution pressure motor 14 is normal pressure, and realizes the control to descending movable arm of excavator speed.But when other device (as revolution) when moving simultaneously, recirculating oil quantity may appear less than the fuel delivery situation of master variable pump 3 (this situation only occur in the very little of descending movable arm of excavator speed control and in the situation that other device flow is very large), fully lean on main reversing valve 7 to the control of excavator swing arm speed this moment, inhale empty in order to prevent hydraulic motor 14, be provided with one way valve II 17, can replenish the fluid backflow from fuel tank 1 and enter hydraulic motor 14.
The flow-control of hydraulic motor 14 is the return pressures according to the pilot pressure of pressure sensor I 12 (being the aperture of pilot control valve 9) and pressure sensor II 13, pilot control valve 9 apertures are larger, pilot pressure is larger, the flow of the aperture of main reversing valve 7 and hydraulic motor 14 is also larger, and the swing arm decrease speed is also faster.When the return pressure of pressure sensor II 13 hangs down, the restriction loss flow too large or hydraulic motor 14 that main reversing valve 7 is described makes too greatly the recirculating oil quantity of winner's variable pump 3 import departments less than fuel delivery, will turn the flow of hydraulic motor 14 this moment down, reclaim to guarantee that pressure is kept with energy, make the flow of hydraulic motor 14 form rational corresponding with pilot control valve 9 apertures.
As mentioned above, just can realize preferably the utility model.
Above-described embodiment only is the better embodiment of the utility model; but embodiment of the present utility model is not restricted to the described embodiments; other are any not to deviate from change, the modification done under Spirit Essence of the present utility model and the principle, substitute, combination, simplify; all should be the substitute mode of equivalence, be included within the protection domain of the present utility model.
Claims (4)
1. an excavator swing arm potential energy reclaims hybrid power system, comprise fuel tank, master variable pump, motor, main reversing valve, boom cylinder, pilot control valve, it is characterized in that: also comprise one way valve I, transfer case, electric mechanical, electrical memory cell, electric machine controller, pressure sensor I, pressure sensor II, hydraulic motor, clutch, master controller, one way valve II;
The one way valve I is positioned at the master variable pump to the oil circuit of fuel tank, i.e. the outlet of one way valve I connects the master variable pump, the import connected tank;
Transfer case is connected with an end, the master variable pump of motor, motor, clutch respectively and mutually forms link gear, and hydraulic motor connects with the other end of clutch;
The P hydraulic fluid port of main reversing valve connects the master variable pump discharge, the T hydraulic fluid port of main reversing valve connects the import of hydraulic motor and connects simultaneously the one way valve I to the oil circuit between the master variable pump inlet, and the A hydraulic fluid port of main reversing valve and B hydraulic fluid port connect respectively the rod chamber of boom cylinder and the hydraulic fluid port of rodless cavity;
The pilot control valve comprises two pilot valves, and the oil-out of these two pilot valves connects respectively the hydraulic control hydraulic fluid port at main reversing valve two ends, and one of them is used for opening main reversing valve makes the oil-out of pilot valve of the rod chamber oil-feed of boom cylinder also be connected to simultaneously clutch;
Hydraulic motor oil-out connected tank;
The outlet of one way valve II connects hydraulic motor import, import connected tank;
The pressure sensor I is connected on the pilot control valve to oil circuit between the clutch;
The pressure sensor II is connected on the hydraulic motor import oil circuit;
The quantity governor of the quantity governor of master variable pump, the speed probe of motor, hydraulic motor, pressure sensor I, pressure sensor II, electric machine controller, electric memory cell are electrically connected respectively master controller; Motor is electrically connected electric machine controller, and electric machine controller is electrically connected electric memory cell.
2. excavator swing arm potential energy according to claim 1 reclaims hybrid power system, and it is characterized in that: electric memory cell is battery.
3. excavator swing arm potential energy according to claim 1 reclaims hybrid power system, it is characterized in that: the hybrid power system that electric memory cell is comprised of battery, electric capacity.
4. excavator swing arm potential energy according to claim 1 reclaims hybrid power system, and it is characterized in that: motor is generator motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220462031 CN202745096U (en) | 2012-09-11 | 2012-09-11 | Hybrid power system capable of recycling potential energy of movable arm of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220462031 CN202745096U (en) | 2012-09-11 | 2012-09-11 | Hybrid power system capable of recycling potential energy of movable arm of excavator |
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| CN202745096U true CN202745096U (en) | 2013-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220462031 Withdrawn - After Issue CN202745096U (en) | 2012-09-11 | 2012-09-11 | Hybrid power system capable of recycling potential energy of movable arm of excavator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877495A (en) * | 2012-09-11 | 2013-01-16 | 华南理工大学 | Hybrid power system for recovering potential energy of movable arm of excavating machine |
| CN103628519A (en) * | 2013-11-01 | 2014-03-12 | 南京工业大学 | Excavator rotation brake energy recovery system |
| CN106284478A (en) * | 2016-08-05 | 2017-01-04 | 华侨大学 | A kind of electric balancing cylinder potential energy recovery system |
| CN114215829A (en) * | 2021-12-09 | 2022-03-22 | 中联重科土方机械有限公司 | Movable arm potential energy recovery system for engineering equipment and engineering equipment |
-
2012
- 2012-09-11 CN CN 201220462031 patent/CN202745096U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877495A (en) * | 2012-09-11 | 2013-01-16 | 华南理工大学 | Hybrid power system for recovering potential energy of movable arm of excavating machine |
| CN102877495B (en) * | 2012-09-11 | 2014-12-03 | 华南理工大学 | Hybrid power system for recovering potential energy of movable arm of excavating machine |
| CN103628519A (en) * | 2013-11-01 | 2014-03-12 | 南京工业大学 | Excavator rotation brake energy recovery system |
| CN103628519B (en) * | 2013-11-01 | 2015-10-07 | 南京工业大学 | A kind of digger revolving brake energy recovering system |
| CN106284478A (en) * | 2016-08-05 | 2017-01-04 | 华侨大学 | A kind of electric balancing cylinder potential energy recovery system |
| CN114215829A (en) * | 2021-12-09 | 2022-03-22 | 中联重科土方机械有限公司 | Movable arm potential energy recovery system for engineering equipment and engineering equipment |
| CN114215829B (en) * | 2021-12-09 | 2024-03-22 | 中联重科土方机械有限公司 | Swing arm potential energy recovery system for engineering equipment and engineering equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130220 Effective date of abandoning: 20141203 |
|
| RGAV | Abandon patent right to avoid regrant |