CN203166822U - Hybrid power type working machine - Google Patents
Hybrid power type working machine Download PDFInfo
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- CN203166822U CN203166822U CN 201320197701 CN201320197701U CN203166822U CN 203166822 U CN203166822 U CN 203166822U CN 201320197701 CN201320197701 CN 201320197701 CN 201320197701 U CN201320197701 U CN 201320197701U CN 203166822 U CN203166822 U CN 203166822U
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Abstract
Provided in the utility model is a hybrid power type working machine that has the low price and is capable of utilizing the regenerative energy to carry out power assistance on an engine without the need of storage of power for driving a power-assisted motor. The hybrid power type working machine comprises an operating machine, an engine for providing power for the operating machine, a power-assisted motor for carrying out power assistance on the engine, a regeneration apparatus for carrying out regeneration on the surplus energy generated during the acceleration of the operation machine or the inertial energy generated during the deceleration of the operation machine, a generator for utilizing the regenerative energy generated by the regeneration apparatus to carry out power generation, a current transformer for converting an alternating-current voltage generated by power generation of the generator into a direct-current voltage, and an inverter for converting the direct-current voltage of the current transformer into an alternating-current voltage to drive the power-assisted motor. In addition, the hybrid power type working machine also includes a controlling device for controlling the generating capacity of the generator according to the load of the engine.
Description
Technical field
The utility model relates to hybrid power formula Work machine, at length says, relates to having the hybrid power formula Work machine that engine is carried out the assisted electric machine of power-assisted.
Background technology
In the past, as hybrid power formula Work machine, existed to have for the Work machine that the engine that drives hydraulic pump is carried out the assisted electric machine of power-assisted (for example, with reference to international No. 2008/117748 communique (patent documentation 1) that disclose).
In above-mentioned hybrid power formula Work machine, usually use jumbo electric storage means such as battery or capacitor, the energy of regeneration is temporarily stored in the electric storage means, according to the residual capacity of engine loading/rotating speed and electric storage means, carry out the power-assisted of engine with the output that is predetermined.
Yet, have the big such problem of the employed jumbo electric storage means cost height of above-mentioned hybrid power formula Work machine and installation dimension.In addition, also have following problem, this jumbo electric storage means need vibrate countermeasure and cooling countermeasure, and inner heat increases owing to wear out serious, causes charge capacity to reduce.In addition, also there is following problem, in above-mentioned hybrid power formula Work machine, when carrying out upkeep operation, need guarantees fail safe to jumbo electric storage means, the obsolescence cost of jumbo electric storage means is higher, and adjunct circuits such as cutout relay, surge current suppression circuit also make cost raise.
In above-mentioned hybrid power formula Work machine in the past, if in the reclaiming energy process, be in the state that there is engine loading in load owing to Engine driven Hydraulic Pump etc., then can side by side carry out the engine power-assisted with generating, thereby do not need temporarily to store energy in the electric storage means, regenerated energy can be used for the engine power-assisted.
Yet, because there is the big situation of energy output ratio engine load by the regenerated energy generating in the difference of the job state of engine speed or working rig.When such energy output ratio engine load by the regenerated energy generating is big, if former state continues generating, then may cause engine speed to rise and destruction equipment, perhaps the condenser voltage value used of the burning voltage in the controller rises and makes the equipment breakage.
Patent documentation
Patent documentation 1: the international communique that discloses No. 2008/117748
The utility model content
The problem that utility model will solve
Therefore, problem of the present utility model is, provides a kind of the needs that the electric power that is used for driving assisted electric machine is carried out electric power storage, and can utilize regenerated energy engine to be carried out the cheap hybrid power formula Work machine of power-assisted.
For the means of dealing with problems
In order to solve above-mentioned problem, hybrid power formula Work machine of the present utility model is characterised in that to have: working rig; Engine, it provides power for above-mentioned working rig; The assisted electric machine, it is used for above-mentioned engine is carried out power-assisted; Regenerating unit, it is regenerated to the excess energy of above-mentioned working rig generation when accelerating or the inertia energy that produces when slowing down; Generator, it generates electricity by the energy by above-mentioned regenerating unit regeneration; Current transformer, it will be converted to direct voltage by the alternating voltage that above-mentioned generator for electricity generation produces; Inverter, it will be converted to the alternating voltage that drives above-mentioned assisted electric machine by the direct voltage that above-mentioned current transformer is converted to; And control device, the energy output of above-mentioned generator is controlled in its load according to above-mentioned engine.
According to said structure, by regenerating unit generator is generated electricity to the excess energy of working rig generation when accelerating or the inertia energy regeneration of generation when slowing down, by current transformer in the future the alternating voltage of spontaneous motor be converted to direct voltage, by inverter the direct voltage of current transformer is converted to alternating voltage.Like this, drive the assisted electric machine by the alternating voltage that is converted to by inverter.At this moment, control device is according to the energy output of the load control generator of engine, therefore the mode that for example is not more than the electric power amount suitable with engine loading with the energy output of generator limits the energy output of generator, the rising of the DC link between current transformer and the inverter (DC link) voltage can be made as below the allowable voltage thus.Thus, can not need the electric power that is used for driving assisted electric machine is carried out electric power storage, and can utilize regenerated energy and generating side by side engine to be carried out power-assisted.Therefore, can realize to carry out engine the cheap hybrid power formula Work machine of power-assisted.
In addition, in the hybrid power formula Work machine of an execution mode, adopt between above-mentioned current transformer and above-mentioned inverter not to be connected the structure of in fact electric power being carried out the electric storage means of electric power storage and utilizing DC link portion to connect.
According to above-mentioned execution mode, by adopting not being connected between current transformer and the inverter in fact electric power is not carried out the structure that the electric storage means of electric power storage utilizes DC link portion to connect, not using needs vibration countermeasure, cooling countermeasure, Security Countermeasures etc. and larger-size electric storage means, therefore can realize handling easy hybrid power formula Work machine.
In addition, in the hybrid power formula Work machine of an execution mode, above-mentioned control device has: the energy output detection unit, and it judges that whether energy output that the excess energy that above-mentioned generator produces by above-mentioned working rig or the inertia energy that produces can generate electricity is more than the electric power suitable with the load of above-mentioned engine when slowing down when accelerating; And energy output control part, but the generation power that is judged to be above-mentioned generator when above-mentioned energy output detection unit is the electric power suitable with the load of above-mentioned engine when above, control the energy output of above-mentioned generator, so that the energy output of above-mentioned generator becomes the energy output suitable with the load of above-mentioned engine.
According to above-mentioned execution mode, but the generation power that is judged to be generator when the energy output detection unit is the electric power suitable with the load of engine when above, energy output by energy output control part control generator, so that the energy output of generator becomes the energy output suitable with the load of engine, therefore can the dc tache voltage between current transformer and the inverter be suppressed at below the allowable voltage with simple control.Thus, can suppress the overvoltage of the dc tache voltage between current transformer and the inverter, prevent the breakage of parts reliably.
In addition, in the hybrid power formula Work machine of an execution mode, above-mentioned regenerating unit is hydraulic test.
According to above-mentioned execution mode, under the situation of the Work machine that passes through the hydraulic-driven working rig, by in regenerating unit, using hydraulic test, can utilize hydraulic circuit easily the excess energy of working rig generation when accelerating or the inertia energy that produces when slowing down to be regenerated.
The effect of utility model
As known from the above, according to this utility model, can realize not needing to use jumbo electric storage means and can utilize regenerated energy engine to be carried out the cheap hybrid power formula Work machine of power-assisted.
Description of drawings
Fig. 1 is the structure chart of the hybrid power formula Work machine of an execution mode of the utility model.
Fig. 2 is the flow chart that describes for the action to above-mentioned hybrid power formula Work machine.
Fig. 3 is the figure that the variation of the dc tache voltage when the engine loading of above-mentioned hybrid power formula Work machine reduces is shown.
Label declaration
1 ... working rig
2 ... engine
3 ... the assisted electric machine
4 ... regenerating unit
5 ... generator
6 ... current transformer
6a ... but generation power calculating part
6b ... the energy output detection unit
6c ... the energy output control part
7 ... inverter
10 ... DC link portion
11 ... the working rig controller
12 ... engine controller
Embodiment
Below, at length hybrid power formula Work machine of the present utility model is described by illustrated execution mode.
Fig. 1 illustrates the structure chart of the hybrid power formula Work machine of an execution mode of the utility model.
As shown in Figure 1, the hybrid power formula Work machine of this execution mode has: working rig 1; Engine 2, it provides power for working rig 1; Assisted electric machine 3, it is used for engine 2 is carried out power-assisted; Regenerating unit 4, it is regenerated to the excess energy of working rig 1 generation when accelerating or the inertia energy that produces when slowing down; Generator 5, it generates electricity by the energy by regenerating unit 4 regeneration; Current transformer 6, it will be converted to direct voltage by the three-phase alternating voltage that generator 5 generatings obtain; And inverter 7, it will be converted to the three-phase alternating voltage that drives assisted electric machine 3 by the direct voltage that current transformer 6 is converted to.At this, working rig 1 is the building machinery etc. with the hydraulic pump that is driven by engine 2.
Above-mentioned hybrid power formula Work machine constitutes, and in the DC link portion 10 between current transformer 6 and inverter 7, does not have the electric storage means that the electric power that is used for driving assisted electric machine 3 is carried out electric power storage.
In addition, above-mentioned hybrid power formula Work machine has the working rig controller 11 of control working rig 1 and the engine controller 12 of control engine 2.Above-mentioned working rig controller 11 communicates and coordination each other with engine controller 12.
In addition, working rig 1 has the rotary hydraulic motor (not shown) as an example of load.Energy when regenerating unit 4 utilizations are returned fuel tank (not shown) via the overflow valve that moves when this rotary hydraulic motor accelerates or slow down makes generator 5 work.
In addition, current transformer 6 has: but generation power calculating part 6a, but the generation power of its calculating generator 5; Energy output detection unit 6b, it judges the excess energy that generator 5 produces by working rig 1 or the inertia energy that produces when slowing down when accelerating and whether the energy output that can generate electricity is more than the electric power suitable with the load of engine 2; And energy output control part 6c, but the generation power that is judged to be generator 5 as energy output detection unit 6b is the electric power suitable with the load of engine 2 when above, the energy output of control generator 5 is so that the energy output of generator 5 becomes the energy output suitable with the load of engine 2.
But by generation power calculating part 6a, energy output detection unit 6b and the energy output control part 6c of above-mentioned engine controller 12 and current transformer 6, constitute the control device of controlling the energy output of generator 5 according to the load of engine 2.
By the energy output control part 6c of above-mentioned current transformer 6, for example offer the generator torque of generator 5 by control, control the energy output of generator 5.
Hybrid power formula Work machine according to said structure, by regenerating unit 4 excess energy of 5 pairs of working rigs 1 of generator generation when accelerating or the inertia energy regeneration of generation when slowing down are generated electricity, by current transformer 6 in the future the three-phase alternating voltage of spontaneous motor 5 be converted to direct voltage, by inverter 7 direct voltage of current transformer 6 is converted to three-phase alternating voltage.Like this, drive assisted electric machine 3 by the three-phase alternating voltage that is converted to by inverter 7, engine 2 is carried out power-assisted.
According to flow chart shown in Figure 2 the engine controller 12 of hybrid power formula Work machine and the action of current transformer 6 are described below.
At first, engine controller 12 calculates engine loading in step S11.At this, by engine controller 12 according to the rotating speed of engine 2 with from the calculation engine loads such as discharge pressure of the hydraulic pump (not shown) of working rig controller 11.
Then, after the engine loading that will calculate sends to current transformer 6, return step S11 in step S12.
On the other hand, in step S21, current transformer 6 receives the engine loading that sends from engine controller 12.
Then, enter step S22, but judge that whether generation power is greater than engine loading.Then, but when being judged as generation power greater than engine loading, entering step S23, on the other hand, but is engine loading when following when being judged as generation power, enters step S24.
At this, the rotating speed of the pressure of the work oil when being provided for regenerating unit 4 according to the work oil that will return fuel tank and flow or engine 2 etc., but but the generation power calculating part 6a by current transformer 6 calculates generation power.
Then, in step S23, by the energy output control part 6c of current transformer 6, the generation power of generator 5 is made as the electric power suitable with engine loading.On the other hand, in step S24, by the energy output control part 6c of current transformer 6, but the generation power of generator 5 is made as generation power.
At this, the engine loading that sends from engine controller 12 be with engine controller 12 and current transformer 6 between the signal of the corresponding form of communication mode.
In addition, in the above-described embodiment, current transformer 6 will be sent to by the engine loading that engine controller 12 calculates, but also mode of operation and the load of the working rig 1 that calculated by working rig controller 11 current transformer 6 can be sent to.Under this situation, owing to have dependency relation between the mode of operation of working rig 1 and load and the engine loading, so the energy output detection unit 6b of current transformer 6 comes the estimated engine load according to mode of operation and the load of the working rig 1 that sends from working rig controller 11.
In addition, Fig. 3 illustrates the variation of the dc tache voltage when the engine loading of above-mentioned hybrid power formula Work machine reduces.In Fig. 3, transverse axis is represented the time [arbitrary scale], and the longitudinal axis is represented dc tache voltage [V] and engine loading [kW].
Dc tache voltage when single-point line expression shown in Figure 3 does not have according to the energy output of engine loading control generator 5, when engine loading reduces, the energy output of generator 5 is bigger than the electric power amount suitable with engine loading, and the dc tache voltage between current transformer 6 and the inverter 7 has surpassed the high limit of tolerance voltage 400VDC of circuit.
Relative therewith, the dc tache voltage when solid line shown in Figure 3 illustrates according to the energy output of the engine loading control generator 5 of the hybrid power formula Work machine of this execution mode.
In the hybrid power formula Work machine of this execution mode, as shown in Figure 3, the energy output of current transformer 6 restriction generators 5, so that the energy output of generator 5 is not more than the electric power amount suitable with engine loading, thus, the change of the dc tache voltage between current transformer 6 and the inverter 7 can be suppressed at below the allowable voltage.
Thus, can prevent the power of assisted electric machine 3 output greater than engine loading, the rotating speed of engine 2 rises and makes engine 2 breakages, and, by suppressing the overvoltage of the dc tache voltage between current transformer 6 and the inverter 7, can prevent the breakage of current transformer 6 and inverter 7.
Like this, according to above-mentioned hybrid power formula Work machine, energy output control part 6c by engine controller 12 and current transformer 6, so that the energy output of generator 5 becomes the energy output that the mode that is not more than the electric power amount suitable with engine loading limits generator 5, thus, the change of the dc tache voltage between current transformer 6 and the inverter 7 can be controlled below allowable voltage.Owing to do not need the electric power that is used for driving assisted electric machine 3 is carried out electric power storage, can utilize regenerated energy and generating side by side engine 2 to be carried out power-assisted, therefore, can realize carrying out engine 2 the cheap hybrid power formula Work machine of power-assisted.
In addition, connect between above-mentioned current transformer 6 and the inverter 7 by adopting by DC link portion 10, in order between the two, do not connect the structure of carrying out the electric storage means of electric power storage in fact, need not to use needs to vibrate countermeasure, cooling countermeasure, Security Countermeasures etc. and larger-size electric storage means, therefore, can realize handling easy hybrid power formula Work machine.
Electric storage means roughly is divided into pulsation (ripple) and removes (smoothly) and accumulate usefulness, AC coupled usefulness with, electric power, in this manual, " in fact electric power being carried out the electric storage means of electric power storage " is that electric power is accumulated usefulness, is different from current transformer and inverter etc. the pulsation of using and removes (smoothly) with capacitor or AC coupled capacitor.
In addition, but the generation power that is judged to be above-mentioned generator 5 as energy output detection unit 6b is the electric power suitable with the load of engine 2 when above, energy output by energy output control part 6c control generator 5, so that the energy output of generator 5 becomes the energy output suitable with the load of engine, thus, can the dc tache voltage between current transformer 6 and the inverter 7 be suppressed at below the allowable voltage with simple control.Thus, can suppress the overvoltage of the dc tache voltage between current transformer 6 and the inverter 7, prevent the breakage of parts reliably.
In addition, by in above-mentioned regenerating unit 4, using hydraulic test, can utilize hydraulic circuit easily to carry out the regeneration of the excess energy that working rig 1 produces or the inertia energy that when slowing down, produces when accelerating.
In the above-described embodiment, the hybrid power formula Work machine that has rotary hydraulic motor (not shown) in working rig 1 is illustrated, but the working rig of hybrid power formula Work machine of the present utility model is not limited to rotary hydraulic motor, so long as can utilize the working rig of regenerated energy to get final product.
Concrete execution mode of the present utility model is illustrated, but the utility model is not limited to above-mentioned execution mode, can in scope of the present utility model, carries out various changes and implement.
Claims (4)
1. a hybrid power formula Work machine is characterized in that, this hybrid power formula Work machine has:
Working rig (1);
Engine (2), it provides power to above-mentioned working rig (1);
Assisted electric machine (3), it is used for above-mentioned engine (2) is carried out power-assisted;
Regenerating unit (4), it is regenerated to the excess energy of above-mentioned working rig (1) generation when accelerating or the inertia energy that produces when slowing down;
Generator (5), it generates electricity by the energy by above-mentioned regenerating unit (4) regeneration;
Current transformer (6), it will be converted to direct voltage by the alternating voltage that above-mentioned generator (5) generating obtains;
Inverter (7), it will be converted to the alternating voltage that drives above-mentioned assisted electric machine (3) by the direct voltage that above-mentioned current transformer (6) are converted to; And
Control device, the energy output of above-mentioned generator (5) is controlled in its load according to above-mentioned engine (2).
2. hybrid power formula Work machine according to claim 1 is characterized in that,
Employing is not connected the structure of in fact electric power being carried out the electric storage means of electric power storage and utilizing DC link portion (10) to connect between above-mentioned current transformer (6) and above-mentioned inverter (7).
3. hybrid power formula Work machine according to claim 1 is characterized in that,
Above-mentioned control device has:
Energy output detection unit (6b), it judges that whether energy output that the excess energy that above-mentioned generator (5) produces by above-mentioned working rig (1) or the inertia energy that produces can generate electricity is more than the electric power suitable with the load of above-mentioned engine (2) when slowing down when accelerating; And
Energy output control part (6c), when being judged to be electric power that above-mentioned generator (5) can generate electricity, above-mentioned energy output detection unit (6b) is the electric power suitable with the load of above-mentioned engine (2) when above, control the energy output of above-mentioned generator (5), so that the energy output of above-mentioned generator (5) becomes the energy output suitable with the load of above-mentioned engine (2).
4. according to any described hybrid power formula Work machine in the claim 1 to 3, it is characterized in that,
Above-mentioned regenerating unit (4) is hydraulic test.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012109924A JP5578194B2 (en) | 2012-05-11 | 2012-05-11 | Hybrid work machine |
| JP2012-109924 | 2012-05-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203166822U true CN203166822U (en) | 2013-08-28 |
Family
ID=49027976
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310135833.4A Expired - Fee Related CN103391039B (en) | 2012-05-11 | 2013-04-18 | Hybrid power type Work machine |
| CN 201320197701 Expired - Fee Related CN203166822U (en) | 2012-05-11 | 2013-04-18 | Hybrid power type working machine |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310135833.4A Expired - Fee Related CN103391039B (en) | 2012-05-11 | 2013-04-18 | Hybrid power type Work machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5578194B2 (en) |
| CN (2) | CN103391039B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103391039A (en) * | 2012-05-11 | 2013-11-13 | 大金工业株式会社 | Hybrid power type working machine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763015A (en) * | 2015-04-27 | 2015-07-08 | 姚耀春 | Alternating current/storage battery dual-purpose electric loader |
| CN106958561B (en) * | 2017-03-21 | 2019-01-11 | 杭州蓝力电动科技有限公司 | Dual power supply type engineering machinery |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006348978A (en) * | 2005-06-13 | 2006-12-28 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Driving device of work machine |
| US8285434B2 (en) * | 2007-12-28 | 2012-10-09 | Sumitomo Heavy Industries, Ltd. | Hybrid-type construction machine having an output condition calculating unit to calculate output conditions of an engine and an electric storage device |
| JP5188854B2 (en) * | 2008-03-26 | 2013-04-24 | 住友重機械工業株式会社 | Hybrid construction machine |
| JP2010229731A (en) * | 2009-03-27 | 2010-10-14 | Nabtesco Corp | Control device for hybrid construction machinery |
| JP5355493B2 (en) * | 2010-05-14 | 2013-11-27 | カヤバ工業株式会社 | Hybrid construction machinery |
| JP5578194B2 (en) * | 2012-05-11 | 2014-08-27 | ダイキン工業株式会社 | Hybrid work machine |
-
2012
- 2012-05-11 JP JP2012109924A patent/JP5578194B2/en not_active Expired - Fee Related
-
2013
- 2013-04-18 CN CN201310135833.4A patent/CN103391039B/en not_active Expired - Fee Related
- 2013-04-18 CN CN 201320197701 patent/CN203166822U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103391039A (en) * | 2012-05-11 | 2013-11-13 | 大金工业株式会社 | Hybrid power type working machine |
| CN103391039B (en) * | 2012-05-11 | 2015-11-18 | 大金工业株式会社 | Hybrid power type Work machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5578194B2 (en) | 2014-08-27 |
| JP2013240149A (en) | 2013-11-28 |
| CN103391039B (en) | 2015-11-18 |
| CN103391039A (en) | 2013-11-13 |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 |