CN102884314B - The TRT of renewable energy type - Google Patents

Abstract

The invention is intended to provide the TRT of a kind of renewable energy type, it can control hydraulic accurately according to control signal.This TRT of renewable energy type includes: the rotary shaft (18) driven by regenerative resource, the hydraulic pump (20) driven by rotary shaft (18), the hydraulic motor that the pressurised oil supplied by hydraulic pump drives, it is attached to the electromotor of hydraulic motor, by the high-pressure oil passage (22) of the outlet side of its hydraulic pump with the entrance side fluid communication of hydraulic motor, and the low pressure oil way (23) by the entrance side of its hydraulic pump with the outlet side fluid communication of hydraulic motor.Each in described hydraulic motor and hydraulic pump (20) includes: multiple working chambers (53), and the most each working chamber is surrounded by cylinder (51) and piston (52)；High-pressure main (60), they multiple first branched bottoms (60A) including being each attached to working chamber and be connected to high-pressure oil passage first merging passage (60B), the first branched bottom is attached to be then incorporated into together in the first merging passage；Low-pressure manifold (62), they multiple second branched bottoms (62A) including being each attached to working chamber and second merge passage (62B), and the second branched bottom is attached to be then incorporated into together in the second merging passage；High pressure valve (65), it is arranged in the first branched bottom of high-pressure main；Low pressure valve, it is separately positioned in the second branched bottom of low-pressure manifold；With their housing (50) of receiving.

Description

The TRT of renewable energy type

Technical field

The present invention relates to the TRT of a kind of renewable energy type, it is via composite hydraulic pumps and the liquid of hydraulic motor Pressure actuating device, can be sent to TRT by the rotation of the rotor obtained from regenerative resource.

Background technology

In the last few years, from the viewpoint of environmental conservation, use the TRT of renewable energy type will become increasingly Generally, wherein the TRT of renewable energy type for example, utilizes the wind turbine generator of wind-force and utilizes trend The tidal current generator of (tidal current).

The actuating device of these renewable energy devices conventionally used change speed gear box form, by the kinetic energy of input regenerative resource The relatively low input rapid change of power extraction mechanism become higher output speed, to drive TRT, wherein energy is taken out Take mechanism's for example, wind or the rotor of tidal turbine generator.Such as, in common wind turbine generator, the rotating speed of rotor The most several go to tens turns every point, and the normal speed of TRT be normally 1500rpm or 1800rpm, it is therefore desirable to Mechanical gearbox.Therefore, mechanical gearbox is arranged between rotor and electromotor.Specifically, the rotating speed of rotor is by becoming Speed case increases to the normal speed of electromotor, and is then input to electromotor.

The actuating device of such change speed gear box form is all a challenge to design and construction, because it easily lost efficacy, and And safeguard and replace or maintenance cost higher.

Another challenge of the TRT of design renewable energy type is to utilize power extraction in all situations The optimised quantity of mechanism's extracting energy.Maximally effective device is allowed to be achieved in that: by blade remains fixing luffing angle, And in the major part of range of operation, proportionally change the rotary speed of blade with wind speed or water speed, to remain the most fixing " tip speed ratio ".Required for the TRT of cost-effective renewable energy type, the change speed gear box of yardstick is can not change Fixed ratio, it is therefore desirable to the complicated power inverter being prone to lose efficacy is to supply power to AC electrical network.

In the last few years, as the replacement of mechanical gearbox, equipped with hydraulic (hydraulictransmission) TRT of renewable energy type is obtaining more concern, wherein this liquid Pressure actuating device uses hydraulic pump and the combination of hydraulic motor of variable displacement.In such TRT, even if bigger On yardstick, it is also possible to realize hydrostatic ratio-change transmission.And such hydrostatic transmissions than change speed gear box gentlier, firmer, also Lighter than DC generator driver element.Therefore, the totle drilling cost of generating is reduced.

Non-patent literature 1 discloses the structure of a kind of hydraulic being applied to wind turbine generator.Hydraulic pressure passes Dynamic device includes being connected to the hydraulic pump of rotor, being connected to the hydraulic motor of electromotor and be arranged in hydraulic pump and hydraulic pressure High-pressure main between motor and low-pressure manifold.Each multiple cylinder and piston of including in hydraulic pump and motor, and constantly Start and disable the working chamber being formed between cylinder and piston to change discharge capacity (displacement).

As a kind of substitute technology, patent documentation 1 provides a kind of wind turbine generator using hydraulic, Wherein hydraulic has the combination of hydraulic pump and the hydraulic motor being connected to electromotor being rotated driving by rotor.? In the hydraulic of described wind turbine generator, hydraulic pump and hydraulic motor are respectively via high-pressure bottle and low pressure vessel Connect.This makes the rotation of rotor can be transferred to electromotor via hydraulic.Hydraulic pump is by multiple pistons and cylinder And the cam making piston periodically move at cylinder is constituted.

Additionally, patent document 2 describe that a kind of wind turbine generator using hydraulic, wherein hydraulic drive The hydraulic pump that device is rotated by rotor, the hydraulic motor being connected to electromotor and the oil being arranged between hydraulic pump and hydraulic motor Road is constituted.In the hydraulic of this wind turbine generator, hydraulic pump is by organizing piston and cylinder more, making piston week in cylinder The cam moved back and forth to phase property and the high pressure valve opened and closed along with moving back and forth of piston and low pressure valve are constituted.Logical Cross and piston is locked at top dead-centre, cylinder and piston the working chamber surrounded is disabled, and therefore hydraulic pressure pump delivery changes.

Although described hydraulic pump and hydraulic motor are not the most variable displacements, patent document 3 discloses that one has hydraulic pump Wind turbine generator with hydraulic motor.The wind turbine generator of patent documentation 3 is supplied to liquid from hydraulic pump by regulation The pressure of the hydraulic oil of pressure motor, the rotating speed keeping electromotor is constant.In this wind turbine generator, hydraulic pressure delivery side of pump Side is connected to the entrance side of hydraulic motor via the inner space of the pylon as high-voltaghe compartment, and the entrance side of hydraulic pump is via layout Low-pressure cabinet below pylon is connected to the outlet side of hydraulic motor.

Reference listing

Non-patent literature

Non-patent literature 1:

W.H.S.Rampen et al., " Gearless transmissions for large wind-turbines-The History and future of hydraulic drives ", DEWEK Bremen, in December, 2006

Patent documentation

Patent documentation 1:US 2010/0032959A

Patent documentation 2:US 2010/0040470A

Patent documentation 3:US7436086B

Summary of the invention

Technical problem

In the TRT of the most above-mentioned renewable energy type, it is intended that it extracts from regenerative resource effectively Energy, and keep higher generating efficiency.But, the regenerative resource used in such TRT is usually such as wind energy With the natural energy of trend, and the available energy hunting that generates electricity is bigger.Therefore, it is difficult to extract energy with peak efficiency.Especially, Described renewable energy instantaneous unstability in cycle short period is higher, it is therefore necessary to carry out the fluctuation controlling to respond energy To efficiently extract energy.

In consideration of it, the document 1 and 2 of non-patent literature and patent proposes the discharge capacity of regulation hydraulic pump or hydraulic motor with response Energy hunting.But, above document neither one is given and highly precisely regulates hydraulic pump or motor according to control signal The concrete structure of discharge capacity.And, in the structure described by patent documentation 3, proportioning valve be arranged in high-voltaghe compartment and hydraulic motor it Between oil circuit on, owing to proportioning valve is positioned at the place that the flow velocity of hydraulic oil is bigger, is accordingly difficult to enforcement and is accurately controlled.

In view of problem above, it is an object of the present invention to provide the TRT of a kind of renewable energy type, its energy Hydraulic is enough extremely accurate controlled according to control signal.

Technical scheme

The invention provides the TRT of the renewable energy type of a kind of renewable energy power generation.Described renewable The TRT of energy source type can include but not limited to: rotary shaft, and this rotary shaft is driven by regenerative resource；Hydraulic pump, should Hydraulic pump is driven by rotary shaft；Hydraulic motor, the pressurised oil that this hydraulic motor is supplied by hydraulic pump drives；Electromotor, this generating Machine is attached to hydraulic motor；High-pressure oil passage, the outlet side of hydraulic pump is by the entrance side fluid of this high-pressure oil passage Yu hydraulic motor Connection；And low pressure oil way, the entrance side of hydraulic pump is in fluid communication by the outlet side of this low pressure oil way with hydraulic motor.And institute That states in hydraulic motor and hydraulic pump each includes but not limited to: multiple working chambers, each in the plurality of working chamber by cylinder and The piston moved back and forth in described cylinder surrounds；High-pressure main, this high-pressure main includes that multiple first branched bottom and first closes And passage, wherein the first branched bottom is each attached to working chamber, and first merges passage is connected to high-pressure oil passage, the first branch Tunnel connection is to being then incorporated into together in the first merging passage；Low-pressure manifold, this low-pressure manifold includes multiple second branched bottom Merging passage with second, wherein the second branched bottom is each attached to working chamber, and second merges passage is connected to low pressure oil way, the Bifurcating channel is attached to be then incorporated into together in the second merging passage；Multiple high pressure valves, the plurality of high pressure valve is separately positioned on In first branched bottom of high-pressure main, to open and close the first branched bottom；Multiple low pressure valves, the plurality of low pressure valve is respectively It is arranged in the second branched bottom of low-pressure manifold, to open and close the second branched bottom；And housing, this housing receiving work Chamber, high-pressure main, low-pressure manifold, high pressure valve and low pressure valve.

In the TRT of this renewable energy type, high pressure valve is arranged in the first branched bottom being connected to working cylinder In and low pressure valve be arranged in the second branched bottom.Thus, it is possible to it is non-according to the control signal being sent to hydraulic Often accurately regulate valve.Even if this also can obtain higher generating efficiency in the fluctuation of renewable energy.

Additionally, described housing accommodates working chamber, high-pressure main, low-pressure manifold, high pressure valve and low pressure valve, thus reduce dress The size put.

In the TRT of described renewable energy type, at least one in hydraulic pump and hydraulic motor can include It is contained in the cylinder body in described housing.Described cylinder is arranged on cylinder interior.Further, at least one in hydraulic pump and hydraulic motor The first branched bottom and the second branched bottom can be arranged in cylinder interior.

In this way, the first branched bottom and the second branched bottom can be arranged in cylinder interior.Thus, it is not necessary to install again From working chamber respectively to the first and second pipelines merging passage, thus reduce the size of hydraulic pump or hydraulic motor.

In the TRT of described renewable energy type, the high pressure of at least one in hydraulic pump and hydraulic motor is total First merging passage of pipe can be arranged on inside end plate, the rotation of at least one along hydraulic pump and hydraulic motor of the described end plate The direction turning central shaft forms a motor.

In this way, the first merging passage of the high-pressure main of in hydraulic pump and hydraulic motor is arranged on formation shell Inside the end plate of the end face of body.Thus, it is possible to prevent the hydraulic fluid leak of high pressure, thus improve fluid tightness.

In the TRT of described renewable energy type, multiple cylinder arrays can be along hydraulic pump and hydraulic motor At least one be arranged circumferentially in cylinder interior, each cylinder array is by the rotation of at least one along hydraulic pump and hydraulic motor Multiple cylinders of the direction alignment of central axis are constituted, and high pressure communicating passage can be arranged on adjacent two cylinder battle array in cylinder interior Between row, and the first branched bottom is connected to belong to the working chamber of the cylinder of a cylinder array or two adjacent cylinder arrays, institute State the first branched bottom and can merge passage via high pressure communicating passage with first.

In this way, the first branched bottom is via the high pressure communicating passage being formed between adjacent two cylinder array and the One merges passage.Thus, it is possible to simplify the structure of oil circuit, thus save space.

In the TRT of this renewable energy type, at least one of hydraulic pump and hydraulic motor, housing and Annulus between cylinder body defines the second merging passage of low-pressure manifold.

In this way, the second merging passage of low-pressure manifold is formed in the annulus between housing and cylinder body.Thus, The space between housing and cylinder body can be utilized, thus save space and simplify the structure of pipeline.

In the TRT of this renewable energy type, the high-pressure main of hydraulic pump directly can be connected by high-pressure oil passage It is connected to the high-pressure main of hydraulic motor, high-pressure oil passage does not limit any intervention valve (intervening of oil flowing And the low-pressure manifold of hydraulic pump can be connected directly to the low-pressure manifold of hydraulic motor, low by low pressure oil way valve), Force feed road does not limit any intervention valve of oil flowing.

When valve is arranged in high-pressure oil passage, valve can limit oil flowing, thus causes energy loss, and causes efficiency to drop Low.Therefore, as it has been described above, the high-pressure main of hydraulic pump is not by having the high-pressure oil passage of any intervention valve to be connected directly to hydraulic pressure horse The high-pressure main reached, thus generate electricity efficiently in the case of not causing energy loss.By making high-pressure oil passage and low pressure oil Road is not provided with any intervention valve, connection hydraulic pump and the pipeline structure of hydraulic motor can be simplified, thus reduce the chi of device Very little.

The TRT of described renewable energy type can also include bypass and high-pressure pressure-reducing valve, wherein said Bypass connection high-pressure oil passage and low pressure oil way are to bypass hydraulic motor, and described high-pressure pressure-reducing valve is arranged in bypass.

Such as, when the pressure in high-pressure oil passage is increased to the setting pressure of high-pressure decompression valve, high-pressure decompression valve open with Via bypass, hydraulic oil is discharged to low pressure oil way, thus the pressure in high-pressure oil passage is maintained in suitable scope.

The TRT of described renewable energy type may also include at least one accumulator valve and at least one accumulator, At least one accumulator described is connected to high-pressure oil passage by least one accumulator valve respectively.At least one accumulator valve described Can open and close, with at least one accumulator described and the state of high-pressure oil passage fluid communication and at least one storage described Can switch between device and the state of high-pressure oil passage isolation.

In this way, accumulator valve opens and closes, accumulator to be connected to high-pressure oil passage and disconnects from high-pressure oil passage. Thus, it is possible to preserve the unnecessary energy of input hydraulic pressure actuating device, and it is unnecessary to discharge this preservation when output power deficiency Energy, it is achieved thereby that stably generate electricity with the wind power energy of easily fluctuation.

In the TRT of described renewable energy type, when the pressure in working chamber exceedes the pressure in high-pressure oil passage Time, the high pressure valve of described hydraulic pump can be opened, and flows to height to allow hydraulic oil to pass through high-pressure main from the working chamber of hydraulic pump Force feed road.

Meanwhile, when dropping to below the pressure in low pressure oil way when the pressure in working chamber, the low pressure valve of hydraulic pump is permissible Open, to allow hydraulic oil to be flowed to the working chamber of hydraulic pump from low pressure oil way by low-pressure manifold.

Above-mentioned structure can be selected as desired to remove complicated Valve controlling, thus simplify control.

In the TRT of described renewable energy type, in hydraulic pump and the high pressure valve of hydraulic motor and low pressure valve At least one can be pressure-operated check valve, and described check valve can be by by least one in high pressure valve and low pressure valve Pressure reduction and open, to allow hydraulic oil to flow in one direction.

In this way, described pressure reduction the check valve opened and closed is used in hydraulic pump and the high pressure valve of hydraulic motor and low In at least one in pressure valve, thus save the electric power for opening and closing valve, and also reduce operating cost.Separately Outward, it is allowed to hydraulic oil flows in one direction, thus prevent hydraulic oil to reflux.

In the TRT of described renewable energy type, in hydraulic pump and the high pressure valve of hydraulic motor and low pressure valve At least one is electronic control valve, and the TRT of described renewable energy type also includes controller, described controller Control the opening and closing of the electronic control valve of relevant to the cycle stage of piston movement (in a phasedrelation), with The net volume amount (net volume) of the hydraulic oil that regulation working chamber is discharged in each cycle.

In such a case, controller can change the number of the working chamber being in idling conditions, with in each work Circulation regulates the net volume amount of the hydraulic oil that working chamber is discharged, in the whole circulation of piston movement, is in idling conditions The low pressure valve of working chamber stays open.

In this way, the number of the working chamber being in idling conditions is changed to adjust the clean body of the hydraulic oil that working chamber is discharged Accumulated amount, thus control discharge capacity progressively, and make to control the easiest.

When controller can also change the cut out of least one set low pressure valve and high pressure valve in each circulation of piston movement Between, to regulate the net volume amount of hydraulic oil that working chamber is discharged in each cycle, to belong to described least one set low pressure valve and Whole valves in high pressure valve, the shut-in time changed jointly.

In this way, the shut-in time of the valve of identical group is synchronized, thus improves control stability, and makes to be easier to obtain Know the time of maintenance.

In the TRT of described renewable energy type, in hydraulic pump and the high pressure valve of hydraulic motor and low pressure valve At least one can be electronic control valve.Described electronic control valve is that the face seal can not opened under authorized pressure promotes valve.

In this case, at least one Wei electronics control in hydraulic pump and the high pressure valve of hydraulic motor and low pressure valve Valve processed, and the TRT of described renewable energy type also includes the control that controls the opening and closing of this electronic control valve Device, to stop the moment of torsion and flow waves caused by the asymmetric outflow working chamber of hydraulic oil during each circulation of piston movement Dynamic.

In this way, flowing and the fluctuation of moment of torsion that asymmetric stream causes are suppressed, it is achieved thereby that stable operation.

In the TRT of described renewable energy type, each low pressure valve of hydraulic pump can be that normally opened electromagnetism is closed Valve, when the pressure in working chamber is less than the pressure in low pressure oil way, described solenoid closed valve is opened passively.

In this way, when the pressure in working chamber is less than the pressure in low pressure oil way, each low pressure valve is opened passively, Thus save the electric power required for excitation valve.When the pressure in working chamber increases undeservedly, low pressure valve is released, thus Rise with preventing the pressure anomaly in working chamber.

The TRT of described renewable energy type can also include pressure transducer and temperature sensor, wherein pressure The pressure of hydraulic oil in sensor measurement high-pressure oil passage, temperature sensor is arranged on one in high-pressure oil passage and low pressure oil way In, to measure the temperature of the hydraulic oil in high-pressure oil passage and low pressure oil way.For example, it is possible to based on the pressure measured And/or temperature controls high pressure valve or low pressure valve, thus realize suitable control.

In the TRT of described renewable energy type, TRT can be wind turbine generator, and it passes through Wind as regenerative resource generates electricity.

In wind turbine generator, wind power energy fluctuation is the biggest.

But, according to the structure of the TRT of above renewable energy type, it is possible to accurately control described device To respond the fluctuation of wind power energy, thus realize stable electric generation.

Beneficial effect

According to the present invention, in hydraulic pump and hydraulic motor, high pressure valve be arranged in be connected to working cylinder the first branch lead to In road and low pressure valve is arranged in the second branched bottom.Thus, it is possible to according to the control signal being sent to hydraulic Highly precisely regulate valve.Even if this also can obtain higher generating efficiency in the fluctuation of renewable energy.

Additionally, the housing of described hydraulic pump and hydraulic motor accommodates working chamber, high-pressure main, low-pressure manifold, height respectively Pressure valve and low pressure valve, thus reduce the size of device.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of the exemplary construction of wind turbine generator.

Fig. 2 is the schematic diagram of the hydraulic pump of wind turbine generator.

Fig. 3 is the schematic diagram of the hydraulic motor of wind turbine generator.

Fig. 4 is the sectional view of the concrete structure showing hydraulic pump.

Fig. 5 is the sectional view of the line A-A intercepting along Fig. 4.

Fig. 6 is the sectional view of the line B-B intercepting along Fig. 5, it is shown that the cylinder body of hydraulic pump.

Fig. 7 is the plan view of the cylinder body observed from the direction C of Fig. 6.

Fig. 8 is the sectional view of the line D-D intercepting along Fig. 4, it is shown that the end plate of hydraulic pump.

Fig. 9 is the sectional view of the concrete structure showing hydraulic motor.

Figure 10 is the sectional view of the line E-E intercepting along Fig. 9.

Figure 11 is the sectional view of the end plate of the hydraulic motor of the line F-F intercepting along Fig. 9.

Figure 12 is the external perspective view of hydraulic motor.

Figure 13 is the sectional view of the modified example showing hydraulic motor.

Detailed description of the invention

The preferred embodiments of the present invention are described in detail referring now to accompanying drawing.But, it is intended to, chi described herein Very little, material, shape, its relative position etc. are interpreted as being only illustrative, and are not limited to the scope of the present invention, unless special Do not illustrate.

The general structure of the wind turbine generator of the present invention set forth below.Fig. 1 is for showing wind turbine generator The schematic diagram of exemplary construction.Fig. 2 is the schematic diagram of the exemplary construction of the hydraulic pump showing wind turbine generator.Fig. 3 is Show the schematic diagram of the example constructions of the hydraulic motor of wind turbine generator.

As an example of wind turbine generator, employ three-vaned wind turbine generator.But, the present invention It is not limited to this example but various types of wind turbine generator can be applied to.

As it is shown in figure 1, wind turbine generator 100 includes the rotor 10 rotated by wind, for increasing turning of rotor 10 The hydraulic 11 of speed, for producing the electromotor 12 of electric power, cabin 14 and for supporting the pylon 15 in cabin 14.

Rotor 10 is configured so that rotary shaft 18 (being equal to the rotary shaft of hydraulic pump) is connected to the wheel hub with blade 16 17.Specifically, three blades 16 from wheel hub 17 radially outward from, and each blade 16 is arranged on the wheel being connected to rotary shaft 18 On hub 17.Thus, acting on the wind energy on blade 16 and rotate as overall rotor 10, the rotation of rotor 10 is via rotary shaft 18 Input hydraulic pressure actuating device 11.Wheel hub 17 can accommodate the pitching drive mechanism of the luffing angle for changing blade 16.

Hydraulic 11 is included the hydraulic pump 20 of the variable displacement rotated by rotary shaft 18, connects via crank axle 31 To the hydraulic motor 21 of variable displacement of electromotor 20 and high-pressure oil passage 22 and that is arranged between hydraulic pump 20 and hydraulic motor 21 Low pressure oil way 23.High-pressure oil passage 22 connects outlet side and the entrance side of hydraulic motor 21 of hydraulic pump 20.Low pressure oil way 23 connects The outlet side of hydraulic motor 21 and the entrance side of hydraulic pump 20.Thus, the hydraulic pump 20 that rotarily drives of rotary shaft 18 rotates, thus Define the pressure reduction between high-pressure oil passage 22 and low pressure oil way 23.Described pressure differential hydraulic motor 21.Hydraulic 11 Adjustment of rotational speed speed increasing ratio (the discharge capacity ratio of hydraulic pump 20 and hydraulic motor 21) according to rotary shaft 18, to keep hydraulic motor 21 Rotating speed is fixing speed.Described hydraulic explained in detail below.

Electromotor 12 is connected to the hydraulic motor 21 of hydraulic 11.Electromotor 12 can use known synchronization to send out Motor or influence generator.The substantially constant moment of torsion of rotating speed inputs electromotor 12, then electromotor 12 from hydraulic motor 21 Create the alternating current that frequency is substantially constant.

Cabin 14 pivotally supports the wheel hub 17 of rotor 10, and accommodates various device, such as hydraulic 11 and sending out Motor 12.It addition, cabin 14 is rotationally supported on pylon 15, and can be turned according to wind direction by deflection motor (not shown) Dynamic.

It addition, the first pressure of the pressure measured in the tachometer of measuring 40 of the rotating speed of rotary shaft 18, measurement high-pressure oil passage 22 The temperature sensor 39 of the temperature of the hydraulic oil in force measuring instrument 41, measurement high-pressure oil passage 22 is arranged on wind turbine generator In 100.The measurement result of tachometer of measuring 40 and the first pressure-measuring device 41 is transferred into controller 1, to control hydraulic pump 20 With hydraulic motor 21.

Controller 1 controls each parts of wind turbine generator.Various signal input controllers 1, input signal is such as The tach signal of tachometer of measuring, the hydraulic oil signal of the first pressure-measuring device 41, the hydraulic fluid temperature letter of temperature sensor 39 Number, the pressure signal of accumulator, the tach signal of hydraulic pump 20 and the tach signal of hydraulic motor 21 that are described later on.Can be with base High pressure valve 65,85, low pressure valve 66,86, accumulator valve 31,32, high pressure relief is controlled at least one above-mentioned input signal Valve 37 and low-voltage decompression valve 47.Controller 1 includes various control device, and controller 1 and this control device can position In different positions, i.e. the outside or inside in cabin 14 so that controller 1 can form distributed control system.All right , the more than function controlled in device and controller 1 can be incorporated in computer processing unit.

Accumulator 33,34 is connected to high-pressure oil passage 22 via accumulator valve 31,32.Accumulator 31,32 can be such as Bellows or piston type, wherein air and hydraulic fluid are by deformable bag separately.At accumulator 33, in 34, the hydraulic pressure of high pressure Oil is introduced into during accumulation of energy, so that capsule deformation or promotion piston carry out compressed air.On the contrary, in pressure releasing process, The air expansion of compression or promote capsule or piston, hydraulic oil to be released accumulator 33,34 from outside pressure-air.

Second pressure-measuring device (not shown) is arranged between accumulator valve 31,32 and accumulator 33,34.Second pressure The pressure of the hydraulic oil in accumulator 33,34 measured by measuring instrument.

The measurement result of the first pressure transducer 41 and the second pressure transducer is transferred into controller 1, for control The opening and closing of accumulator valve 31,32.Preferably, controller 1 is based on the first pressure transducer 41 and the second pressure sensing The measurement result of device controls the opening and closing of accumulator valve 31,32.In this way, the opening of accumulator valve 31,32 Controlled, so that accumulator 33,34 connects with high-pressure oil passage 22 or do not connects with closing.Pass thus, it is possible to preserve input hydraulic pressure The unnecessary energy of dynamic device 11, and this unnecessary energy is discharged when output power deficiency, thus realize with easily fluctuation Wind power energy stably generates electricity.

Bypass 36 is arranged between high-pressure oil passage 22 and low pressure oil way 23.Further, high-pressure decompression valve 37 is arranged on side All in road 70, with the pressure keeping the pressure of the hydraulic oil in high-pressure oil passage 22 not higher than to set.In this way, hydraulic oil is worked as When pressure in road 22 is increased to the setting pressure of high-pressure decompression valve 37, high-pressure decompression valve 37 is automatically turned on logical via bypass Hydraulic oil is discharged to low pressure oil way 23 by road 36.

It addition, hydraulic 11 has fuel tank 42, supply pipeline 43, booster pump 44, oil strainer 45, return pipeline 46 and low-voltage decompression valve 47.From hydraulic motor 22 return all or part of back up through at least one these unit.

As in figure 2 it is shown, hydraulic pump 20 has multiple working chamber 53, cam face and piston surrounded by cylinder 51 and piston 52 52 cams 58 engaged, connect each working chamber 53 and the high-pressure main 60 of high-pressure oil passage 22, connect each working chamber and low pressure The low-pressure manifold 62 of oil circuit 23 and high pressure valve 65 and the low pressure valve 66 organized, be wherein provided with one group high for each working chamber 53 more Pressure valve 65 and low pressure valve 66.

Cylinder 51 is the cylindrical space being formed in the cylinder body being described later on.The working chamber 53 surrounded by cylinder 51 and piston 52 It is formed at cylinder 51 internal.

From the viewpoint of piston 52 runs smoothly along the cam face of cam 58, each in piston 52 preferably wraps Including piston main body 52A and piston roller or piston shoes, wherein piston main body 52A is slidably moved in cylinder 51, roller or work Plug shoes be arranged on piston main body 52A and with the cam of cam 58." piston roller " is and the cam of cam 58 Surface contact the component rolled thereon." piston shoes " is the cam surface contact with cam 58 structure slid on Part.

In example shown in Fig. 2, it is shown that each piston in piston 52 has piston main body 52A and piston roller 52B.

Cam 58 is arranged on the excircle of rotary shaft 18 via cam holder 59.For the once rotation of rotary shaft 18, convex Wheel 58 makes each piston 52 of hydraulic pump 20 move up and down many times, thus increases the moment of torsion of hydraulic pump 20.From this point of view, Cam 58 is preferably ring-shaped cam, and its cam face having defines multiple wave with recess 58A and protuberance 58B Shape, recess 58A and protuberance 58B are alternately located at around rotary shaft 18.

Cam 58 is fixed to cam holder 59 by the fastening member 57 of such as bolt, key and pin.

High-pressure main 60 includes that multiple first branched bottom 60A and first merges passage 60B, wherein the first branched bottom 60A is each attached to working chamber 53, and first merges passage 60B is connected to high-pressure oil passage 22.First branched bottom 60A is attached to one Rise and be then incorporated in the first merging passage 60B.

Low-pressure manifold 62 includes that multiple second branched bottom 62A and second merges passage 62B, wherein the second branched bottom 62A is each attached to working chamber 53, and second merges passage 62B is connected to low pressure oil way 23.Second branched bottom 62A is attached to one Rise and be then incorporated in the second merging passage 62B.

High pressure valve 65 is arranged in the first branched bottom 60A of high-pressure main 60, and low pressure valve 66 is arranged in low-pressure manifold In the first branched bottom 62A of 62.By opening and closing high pressure valve 65 and low pressure valve 66, thus it is possible to vary high-pressure oil passage 22 is with every Connected state between individual working chamber 53 and between low pressure oil way 23 and each working chamber 53.High pressure valve 65 and low pressure valve 66 Open and close the ground of the synchronized movement up and down with piston 52 to carry out.

Preferably, when pressure during the pressure in working chamber 53 exceedes high-pressure oil passage 22, high pressure valve 65 is opened to allow Hydraulic oil flows to high-pressure oil passage 22 by high-pressure main 60 from the working chamber 53 of hydraulic pump 20.Preferably, when in working chamber 53 When pressure drops to below the pressure in low pressure oil way 23, low pressure valve 66 open to allow hydraulic oil pass through low-pressure manifold 62 from Low pressure oil way 23 flows to the working chamber 53 of hydraulic pump 20.Thus, it is possible to remove complicated Valve controlling, thus simplify control.

Furthermore it is preferred that the low pressure valve 66 of hydraulic pump is normally opened solenoid closed valve, when the pressure in working chamber 53 is less than During pressure in low pressure oil way 23, it is opened passively.In this way, in the pressure in working chamber is less than low pressure oil way 23 During pressure, each low pressure valve 66 is opened passively, thus saves the electric power required for excitation valve.Pressure in working chamber 53 When power increases undeservedly, low pressure valve 66 is released, thus rises with preventing the pressure anomaly in working chamber 53.

In hydraulic pump 20, when cam 58 rotates along with rotary shaft 18, the piston main body 52A of each piston 52 is periodically Move up and down.In hydraulic pump 20, be repeatedly carried out pumping step and suck step, wherein in pumping step piston 52 from Bottom dead centre moves to top dead-centre, and in sucking step, piston 52 moves to bottom dead centre from top dead-centre.In pumping step, high pressure valve 65 are opened and low pressure valve 66 is closed, so that the hydraulic oil in working chamber 53 to pass sequentially through the first branched bottom 60A and One merges passage 60B feeds to high-pressure oil passage 22.Meanwhile, in sucking step, high pressure valve 65 is closed and low pressure valve 66 quilt Open, the low pressure oil from low pressure oil way 23 is passed sequentially through the second merging passage 62B and the second branched bottom 62A supply extremely Working chamber 53.

In this way, hydraulic pump 20 rotates along with the rotation of rotary shaft 18, thus at high-pressure oil passage 22 and low pressure oil way Pressure reduction is created between 23.

As it is shown on figure 3, hydraulic motor 21 include multiple be formed between cylinder 71 and piston 72 hydraulic cavities 73, cam face The cam 78 that engages with piston 72, it is connected each working chamber 73 and the high-pressure main 80 of high-pressure oil passage 22, connects each working chamber 73 and the low-pressure manifold 82 of low pressure oil way 23 and be each working chamber 73 arrange high pressure valve 85 and low pressure valve 86.

Cylinder 71 is the cylindrical space being arranged in the cylinder body being described later on.The working chamber 73 surrounded by cylinder 71 and piston 72 It is formed at cylinder 71 internal.

From the viewpoint of the up and down motion of piston 72 is smoothly converted into the rotary motion of cam 78, it is preferable that each Piston 72 includes piston main body 72A and piston roller or piston shoes 72C, and piston main body 72A is slidably moved in cylinder 71, lives Plug roller or piston shoes 72C is arranged on piston main body 72A and with the cam of cam 78.Here, " piston rolls Son " it is the cam surface contact with cam 78 component rotated thereon." piston shoes " is and the cam face of cam 78 The component contacting and sliding on.

Cam 78 is eccentric cam, and it is arranged prejudicially relative to the axle center O of the crank axle 13 being connected to electromotor 12. When piston 72 complete one group move up and down time, cam 78 and cam 78 crank axle 13 mounted thereto complete and once rotate.

High-pressure main 80 includes that multiple first branched bottom 80A and first merges passage 80B, wherein the first branched bottom 80A is each attached to working chamber 73, and first merges passage 80B is connected to high-pressure oil passage 22.First branched bottom 80A is attached to one Rise and be then incorporated in the first merging passage 80B.

Low-pressure manifold 82 includes that multiple second branched bottom 82A and second merges passage 82B, wherein the second branched bottom 82A is each attached to working chamber 73, and second merges passage 82B is connected to low pressure oil way 23.Second branched bottom 82A is attached to one Rise and be then incorporated in the second merging passage 82B.

High pressure valve 85 is arranged in the first branched bottom 80A of high-pressure main 80, and low pressure valve 86 is arranged in low-pressure manifold In the first branched bottom 82A of 82.By opening and closing high pressure valve 85 and low pressure valve 86, thus it is possible to vary high-pressure oil passage 22 is with every Connected state between individual working chamber 73 and between low pressure oil way 23 and each working chamber 73.High pressure valve 85 and low pressure valve 86 Open and close and synchronously carry out with the mobile up and down of piston 72.

In hydraulic motor 21, by utilize the pressure reduction between high-pressure oil passage 22 and low pressure oil way 23 make piston 72 upwards and Move down.In hydraulic motor 21, it is repeatedly carried out activating (motor) step and discharging step, wherein in actuation step Piston 72 moves to bottom dead centre from top dead-centre, and in discharging step, piston 72 moves to top dead-centre from bottom dead centre.In actuation step In, high pressure valve 85 is opened and low pressure valve 86 is closed, with by the hydraulic oil (hydraulic oil) of the high pressure from high-pressure oil passage 22 The the first merging passage 80B and the first branched bottom 80A passing sequentially through high-pressure main 80 supplies to working chamber 73.Meanwhile, row Going out in step, high pressure valve 85 is closed and low pressure valve 86 is opened, so that the hydraulic oil in working chamber 73 is passed sequentially through low pressure The first branched bottom 82A of house steward 82 and first merges passage 82B and is expelled to low pressure oil way 23.

In this way, piston 72 is pushed into downwards bottom dead centre by the hydraulic oil being fed in actuation step in working chamber 73, Then crank axle 13 rotates together with cam 78.

In above-mentioned hydraulic, the high pressure valve 65,85 of hydraulic pump 20 and hydraulic motor 21 and low pressure valve 66, in 86 At least one can be pressure-operated check valve, it can be by by high pressure valve 65,85 and low pressure valve 66, in 86 at least Pressure reduction on one and open, to allow hydraulic oil to flow in one direction.In this way, described pressure reduction open and close Check valve is used in high pressure valve 65,85 and the low pressure valve 66 of hydraulic pump 20 and hydraulic motor 21, at least one in 86, thus saves Save the electric power for opening and closing valve, and also reduce operating cost.It addition, allow hydraulic oil to flow in one direction Dynamic, thus prevent hydraulic oil to reflux.

It addition, the high pressure valve 65,85 of hydraulic pump 20 and hydraulic motor 21 and low pressure valve 66, at least one in 86 is permissible Being electronic control valve, controller 1 can control the opening and closing of the electronic control valve relevant to the cycle stage of piston movement, To regulate the net volume amount of the hydraulic oil that working chamber 53,73 is discharged in each cycle.In such a case, controller 1 can To change the number of the working chamber 53,73 being in idling conditions, to regulate what working chamber 53,73 was discharged in each cycle of operation The net volume amount of hydraulic oil, in the whole circulation of piston movement, is in the low pressure valve 66 of the working chamber 53,73 of idling conditions, 86 stay open.In this way, the number changing the working chamber 53,73 being in idling conditions adjusts working chamber 53, and 73 discharge The volume of hydraulic oil, thus control discharge capacity progressively, and make to control the easiest.

Controller 1 can also change least one set low pressure valve 66,86 and high pressure valve 65 in each circulation of piston movement, The shut-in time of 86, to regulate working chamber 53 in each cycle, the 73 net volume amounts of hydraulic oil discharged, to described in belonging to extremely Lacking one group of low pressure valve 66,86 and high pressure valve 65, the whole valves in 86, the shut-in time is changed jointly.In this way, identical group Shut-in time of valve synchronized, thus improve control stability, and make to be easier to know the time of maintenance.

Additionally, the low pressure valve 66,86 of hydraulic pump 20 and hydraulic motor 21 and high pressure valve 65, at least one in 86 can be Electronic control valve.Described electronic control valve is that the face seal can not opened under authorized pressure promotes valve.

Additionally, the low pressure valve 66,86 of hydraulic pump 20 and hydraulic motor 21 and high pressure valve 65, at least one in 86 can be Electronic control valve, and controller 1 can control the opening and closing of electronic control valve, with each motion cycle phase at piston Between stop the flowing and the fluctuation of moment of torsion that the asymmetric outflow working chamber 53,73 of hydraulic oil causes.In this way, asymmetric stream draws The flowing risen and the fluctuation of moment of torsion are suppressed, it is achieved thereby that stable operation.

Illustrate now the concrete structure of the hydraulic 11 of the wind turbine generator of the present invention.

(hydraulic pump structure)

Fig. 4 to Fig. 8 shows hydraulic pressure pump structure.Fig. 4 is the sectional view of the concrete structure showing hydraulic pump.Fig. 5 is The sectional view intercepted along the line A-A of Fig. 4.Fig. 6 is the sectional view of the line B-B intercepting along Fig. 5, it is shown that the cylinder of hydraulic pump Body.Fig. 7 is the plan view observing cylinder body from the direction C of Fig. 4.Fig. 8 is the sectional view of the line D-D intercepting along Fig. 4, it is shown that The end plate (endplate) of hydraulic pump.

As shown in Figure 4 and Figure 5, hydraulic pump 20 is arranged in rotary shaft 18.Specifically, cam holder 59 is fixed to rotary shaft 18 Outer peripheral face, and cam 58 is arranged on cam holder 59.Additionally, in the example depicted in fig. 4, hydraulic pump 20 is arranged in use Between rotating shaft bearing 19A and 19B pivotally supporting rotary shaft 18 in cabin side.

Pump case 50 is fixed on the periphery of cam holder 59 via pump bearing 55.Pump case 50 covers cylinder 51, piston 52, height Each parts in pressure house steward 60, low-pressure manifold 62, high pressure valve 65 (see Fig. 6), low pressure valve 66 and cam 58, and also prevent liquid Force feed drains to outside.Pump case 50 includes along a pair axial arranged end plate 50A and 50B of rotary shaft 18 and is arranged in described This is to cylindrical housings 50C between end plate 50A and 50B.

Hydraulic pump 20 can include multiple module, and each module is by having the cylinder body 54 of at least one cylinder 51, piston 52, height High pressure valve 65 and low pressure valve 66 that pressure house steward 60, low-pressure manifold 62 and each cylinder 51 for cylinder body 54 are arranged are constituted.Described mould Block is formed by the optional feature of cylinder body 54 and such as piston 52, high pressure valve 65 and low pressure valve 66.

As shown in Figure 6, each cylinder body in cylinder body 54 is in cross-section along circumference or the center of rotation axle of rotary shaft 18 The circular arc component that the direction of line extends.

When cylinder body 54 along the center of rotation axis of rotary shaft 18 direction extend time, each cylinder body in cylinder body 54 include to A few cylinder array 56.Cylinder 51-1,51-2,51-3 that each cylinder body in cylinder body 54 is arranged by the axial direction along rotary shaft 18 Constitute with 51-4.In cylinder body 54, it is disposed with pair of pistons 52, high pressure valve 65 and low pressure valve 66 (see Fig. 6) for each cylinder 51.

As it is shown in figure 5, hydraulic pump 20 includes the multiple modules circumferentially along rotary shaft 18, each module is by circular arc Cylinder body 54, piston 52 and for cylinder body 54 each cylinder 51 arrange high pressure valve 65 and low pressure valve 66 constitute.

Multiple cylinder array 56 being arranged circumferentially in cylinder body 54 along rotary shaft 18.Multiple first branched bottom 60A are from each Cylinder 51 is formed at cylinder body 54 inside along the circumference of central rotation axis.High pressure communicating passage 60C also in cylinder body along shown in Fig. 7 The direction of rotation axis is arranged between adjacent two cylinder array.The the first branched bottom 60A warp being arranged in identical array It is connected to high pressure communicating passage 60C by high pressure valve 65.In this case, the first branched bottom 60A can be connected to belong to The working chamber 53 of the cylinder 51 of two adjacent cylinder arrays 56.

High pressure communicating passage 60C extends to end plate 50B, and as shown in Figure 8, is connected to be formed in end plate 50B One merges passage 60B.The circumference that high pressure communicating passage 60C has along center of rotation axis is formed at the opening in end plate 50B.Should Opening and first merges passage 60B fluid communication.First merges the ring that passage 60B is formed along the circumference of center of rotation axis Shape, and it is connected at least one high-pressure oil passage 22.First merging passage is formed as annular in the drawings.But, this is not limit Property processed, first merges passage 60B can be formed as any shape, such as rectangular loop.

In this way, the first merging passage 60B of high-pressure main 60 is arranged on the end plate 50B of the end face forming pump case 50 Internal.Thus, it is possible to prevent the hydraulic fluid leak of high pressure, thus improve fluid tightness.

Additionally, the first branched bottom 60B via high pressure communicating passage 60C being formed between adjacent two cylinder array with First merges passage 60A fluid communication.Thus, it is possible to simplify the structure of oil circuit, thus save space.

In a preferred embodiment, the first branched bottom 60B merges passage 60A stream via high pressure communicating passage 60C and first Body connects.But, this is not restrictive, and the first branched bottom 60B can be directly connected to the first merging passage 60A.Excellent Select in embodiment, there are multiple cylinder bodies 54 of radiused cross-section along center of rotation axis circumferentially.But, this is not limit Property processed, it is also possible to circumferentially there is the cylinder body of annular cross section.

According to above structure, the hydraulic oil that working chamber 53 extrudes is conducted through the first branched bottom 60A, then passes through It is connected to the first merging passage 60B of the high-pressure oil passage 22 of end plate 50B.

As shown in Figures 4 to 6, low-pressure manifold 62 is arranged in the outside of cylinder body 54 along the radial direction of rotary shaft 18, and It is arranged in the inner side of pump case 50.Low-pressure manifold 62 includes the outside extending in working chamber 53 along the radial direction of rotary shaft 18 Second branched bottom 62 and the second merging passage 62B being formed between the periphery of cylinder body 54 and pump case 50.

Low pressure valve 66 is arranged in the second branched bottom 62A.Second merges passage 62B is provided for multiple cylinder 51, and It is in fluid communication with the low pressure oil way 23 on the top being connected to hydraulic pump 20.In this way, the low pressure oil of low pressure oil way 23 is led to successively Cross the second merging passage 62B and the second branched bottom 62A to supply to each working chamber 53 via low pressure valve 66.

As it has been described above, the first branched bottom 60A and the second branched bottom 62A is formed at the inside of cylinder body 54.Thus, it is not necessary to Install again from working chamber 53 respectively to the first and second pipelines merging passage 60B, 62B, thus reduce the chi of hydraulic pump 20 Very little.

Additionally, the second merging passage 62B of low-pressure manifold 62 is formed at the annulus between pump case 50 and cylinder body 54 In.Thus, it is possible to utilize the space between pump case 50 and cylinder body 54, thus save space and simplify the structure of pipeline.

(hydraulic motor structure)

Fig. 9 to Figure 12 shows the structure of hydraulic motor.Fig. 9 is the sectional view of the concrete structure showing hydraulic motor. Figure 10 is the sectional view of the line E-E intercepting along Fig. 9.Figure 11 is cuing open of the end plate of the hydraulic motor of the line F-F intercepting along Fig. 9 View.Figure 12 is the external perspective view of hydraulic motor.

As shown in Figure 9 and Figure 10, the cam 78 of hydraulic motor 21 is eccentric cam, and it is relative to via axle connecting portion 75 even The axle center O of the crank axle 13 being connected to electromotor 12 is arranged prejudicially.

Motor shell 70 is fixed to axle connecting portion 75 and cam end portion 77, wherein cam end via camshaft bearing 76A, 76B Portion 77 and axle connecting portion 77 are respectively connecting to each end of cam 78.Motor shell 70 covers cylinder 71, piston 72, high-pressure main 80, each parts in low-pressure manifold 82, high pressure valve 85, low pressure valve 86 and cam 78, and also outside preventing hydraulic fluid leak from arriving Portion.Motor shell 70 include along a pair axial arranged end plate 70A and 70B of crank axle 13 and be arranged in described this to end plate Cylindrical housings 70C (see Figure 12) between 70A and 70B.

The cylinder body 74 formed around cam 78 is arranged in hydraulic motor 21.Cylinder body 74 include at least one cylinder 71, a pair Piston 72 and be the high pressure valve 85 that arranges of each cylinder at least one cylinder 71 and low pressure valve 86.Additionally, in showing shown in Figure 10 In example, piston 72 includes piston main body 72A and piston shoes 72C, and piston main body 72A is slidably moved in cylinder 71, and piston is sliding Foot 72C be arranged on piston main body 72A and with the cam of cam 78.

Hydraulic motor 21 can include the multiple modules circumferentially along crank axle 13.Each module can be by partly Cover cam 78 cam face cylinder body 74, for cylinder body 74 each cylinder 71 arrange piston 72 and be cylinder body 74 at least High pressure valve 85 and low pressure valve 86 that each cylinder in one cylinder 71 is arranged are constituted.

Described module can be by a continuous manner around cylinder body 74 arranged circumferentially for the central axis O of crank axle 13 and attachment Parts group to cylinder body 74 is constituted, wherein, and described parts group such as piston 72, high pressure valve 85 and low pressure valve 86.

Each cylinder body in cylinder body 74 is the direction of the center of rotation axis along cam 78 or circumferentially extending component.

When cylinder body 74 is along the direction extension of center of rotation axis, each cylinder body in cylinder body 74 includes at least one cylinder battle array Row, this cylinder array includes the axial arranged multiple cylinders 71 along cam 78.In cylinder body 74, arrange pair of pistons for each cylinder 71 72, high pressure valve 85 and low pressure valve 86.

Hydraulic motor 21 includes the multiple modules circumferentially along cam 78, and the most each module is by the cylinder body of circular arc 74, piston 72 and each cylinder 71 for cylinder body 74 are arranged high pressure valve 85 and low pressure valve 86 are constituted.

Multiple cylinder array being arranged circumferentially in cylinder body 74 along cam 78.Multiple first branched bottom 80A are from each cylinder 71 It is internal that circumference along central rotation axis is formed at cylinder body 74.High pressure communicating passage 80C is also internal along rotation axis at cylinder body 74 Direction be arranged between adjacent two cylinder array, similar to the structure of the hydraulic pump 20 shown in Fig. 7.It is arranged on identical array In the first branched bottom 80A be connected to high pressure communicating passage 80C via high pressure valve 85.In this case, the first branch Passage 80A can be connected to belong to the working chamber 73 of the cylinder 71 of two adjacent cylinder arrays.

High pressure communicating passage 80C extends to end plate 70B, and as shown in figure 11, is connected to be formed in end plate 70B One merges passage 80B.The circumference that high pressure communicating passage 80C has along center of rotation axis is formed at the opening in end plate 70B.Should Opening and first merges passage 80B fluid communication.First merges the ring that passage 80B is formed along the circumference of center of rotation axis Shape, and it is connected at least one high-pressure oil passage 22.First merging passage is formed as rectangular loop in the drawings.But, this is not Restrictive, first merges passage 80B can be formed as any shape, such as annular.

In this way, the first merging passage 80B of high-pressure main 80 is arranged on the end plate 70B of the end face forming pump case 70 Internal.Thus, it is possible to prevent the hydraulic fluid leak of high pressure, thus improve fluid tightness.

Additionally, the first branched bottom 80B via high pressure communicating passage 80C being formed between adjacent two cylinder array with First merges passage 80A fluid communication.Thus, it is possible to simplify the structure of oil circuit, thus save space.

In a preferred embodiment, the first branched bottom 80B merges passage 80A stream via high pressure communicating passage 80C and first Body connects.But, this is not restrictive, and the first branched bottom 80B can be directly connected to the first merging passage 80A.

As it has been described above, hydraulic includes hydraulic pump 12, hydraulic motor 14, high-pressure oil passage 16 and low pressure oil way 18. The outlet side of hydraulic pump 12 is connected to the entrance side of hydraulic motor 14, and the entrance side of hydraulic pump 12 is connected to hydraulic motor 14 Outlet side.

In the drawings, hydraulic 11 is shown as only having a hydraulic motor 21.But, hydraulic 11 can To include more than one hydraulic motor 21, and hydraulic motor 21 can connect via high-pressure oil passage 22 and low pressure oil way 23 respectively It is connected to hydraulic pump 21.

According to above structure, hydraulic pump 20 hydraulic oil supplied is from the height of the end plate 70B being connected to hydraulic motor 21 Force feed road 22 is conducted through the first merging passage 80B and then causes work by the first branched bottom 80A of high-pressure main 80 Make chamber 73.

Low-pressure manifold 82 is along the outside being arranged radially at cylinder body 74 of cam 78, and is arranged in the interior of motor shell 70 Side.Low-pressure manifold 82 includes radially extending the second branched bottom 82 in the outside of working chamber 73 and being formed at along cam 78 The second merging passage 82B between periphery and the motor shell 70 of cylinder body 74.

Low pressure valve 76 is arranged in the second branched bottom 82A.Second merges passage 82B is provided for multiple cylinder 71, and It is in fluid communication with the low pressure oil way 23 on the top being connected to hydraulic motor 21.In this way, the low pressure oil warp that working chamber 73 is discharged And then it is supplied to often by the second merging passage 82B by the second branched bottom 82A of low-pressure manifold 82 by low pressure valve 86 Individual working chamber 73.

As it has been described above, the first branched bottom 80A and the second branched bottom 82A is formed at the inside of cylinder body 74.Thus, it is not necessary to Install again from working chamber 73 respectively to the first and second pipelines merging passage 80B, 82B, thus reduce hydraulic motor 21 Size.

Additionally, the ring-type sky that the second merging passage 82B of low-pressure manifold 82 is formed between motor shell 70 and cylinder body 74 In between.Thus, it is possible to utilize the space between motor shell 70 and cylinder body 74, thus save space and simplify the knot of pipeline Structure.

Figure 13 shows the modified example of above hydraulic motor.For the parts identical with the parts of above-mentioned hydraulic motor Have employed identical reference.

Figure 13 shows the hydraulic motor 21' of double motor type.Hydraulic motor 21' includes two connected via end plate 70B' Individual motor unit 2lA and 2lB.Each in motor unit 2lA and 2lB includes that cylinder 71, piston 72, high-pressure main 80, low pressure are total Pipe 82, high pressure valve 85 (see Figure 10) and low pressure valve 86.Motor unit 2lA and 21B is contained in housing 70'.Housing 70' includes end Plate 70A'-1,70A'-2, end plate 70B' and cylindrical housings 70'C-l or 70'C-2, its end plates 70A'-1,70A'-2 is along liquid The central axial direction of pressure motor 21' is arranged on two ends of hydraulic motor 21', and end plate 70B' is arranged on end plate 70A'-1 With between 70A'-2, cylindrical housings 70'C-l or 70'C-2 are arranged between end plate 70A'-1 or 70A'-2 and end plate 70B'. Motor unit 2lA and 2lB has the cam 78' penetrating end plate 70B'.First merging passage 80B of high-pressure main 80 can be arranged In end plate 70B', and the first merging passage 80 can be configured to be used by two motor unit 2lA and 21B, thus simplifies Pipeline structure.

As it has been described above, in a preferred embodiment, high pressure valve 65,85 are arranged in and are connected to working cylinder 53, first branch of 73 Passage 60A, in 80A, and low pressure valve 66,86 is arranged in the second branched bottom 62A, in 82A.Thus, it is possible to according to being sent to The control signal of hydraulic 11 regulates described valve the most accurately.Even if this also can obtain in the fluctuation of renewable energy Higher generating efficiency.

Additionally, the motor shell of the hydraulic motor 21 in the pump case 50 and Fig. 9 to Figure 12 of hydraulic pump 20 in Fig. 4 to Fig. 8 Body 70 accommodates working chamber 53,73, high-pressure main 60,80, low-pressure manifold 62,82, high pressure valve 65,85 and low pressure valve 66,86, thus Reduce the size of device.

Especially, the high-pressure main 60 of hydraulic pump 20 is not by having the high-pressure oil passage 22 of any intervention valve to be connected directly to liquid The high-pressure main 80 of pressure motor 21, thus generate electricity efficiently in the case of not causing energy loss.

Although describing the present invention by reference to exemplary embodiment, but will be apparent to those skilled in the art It is to make the various changes without departing from the scope of the present invention.

Such as, above preferred embodiment employs the exemplary situation of the application present invention.But, the present invention can also answer For tidal current generator.Here tidal current generator refers to be arranged on such as ocean, river and the place in lake, utilizes trend The TRT of electric power can be produced.Except rotor 10 be rotated by trend rather than wind rotate in addition to, tidal current generator has and wind The basic structure that power turbogenerator 1 is identical.Illustrate with wind turbine generator 100 altogether used here as identical reference Same parts.Tidal current generator includes the rotor 10 rotated by the trend received, for increasing the hydraulic pressure biography of rotor 10 rotating speed Move device 11, for producing the electromotor 12 of electric power.

As it has been described above, the hydraulic 11 of tidal current generator is configured to so that high pressure valve 65,85 are arranged in and are connected to Working cylinder 53, the first branched bottom 60A of 73, in 80A, and low pressure valve 66,86 is arranged in the second branched bottom 62A, 82A In.Thus, it is possible to extremely accurate regulate valve according to the control signal being sent to hydraulic 11.Even if this is renewable The fluctuation of energy also can obtain higher generating efficiency.

Additionally, the motor shell 70 of the pump case 50 of hydraulic pump 20 and hydraulic motor 21 accommodates working chamber 53,73, high pressure total Pipe 60,80, low-pressure manifold 62,82, high pressure valve 65,85 and low pressure valve 66,86, thus reduce the size of device.

Reference

1 controller

10 rotors

11 hydraulics

12 electromotors

13 crank axles

18 rotary shafts

20 hydraulic pumps

21 hydraulic motors

22 high-pressure oil passages

23 low pressure oil ways

31,32 accumulator valve

33,34 accumulators

36 bypass

37 high-pressure pressure-reducing valves

38 second pressure-measuring devices

40 tachometer of measuring

41 first pressure-measuring devices

50 pump case

50A, 50B, 70A, 70B end plate

50C, 70C circumferential housing

51,71 cylinders

52,72 pistons

53,73 working chambers

58,78 cams

60,80 high-pressure mains

60A, 80A first branched bottom

60B, 80B first merges passage

62A, 82A second branched bottom

62B, 82B second merges passage

65,85 high pressure valves

66,86 low pressure valves

Claims (16)

1. with a TRT for the renewable energy type of renewable energy power generation, including:

Rotary shaft, this rotary shaft is driven by regenerative resource；

Hydraulic pump, this hydraulic pump is driven by rotary shaft；

Hydraulic motor, the pressurised oil that this hydraulic motor is supplied by hydraulic pump drives；

Electromotor, this electromotor is attached to hydraulic motor；

High-pressure oil passage, the outlet side of hydraulic pump is in fluid communication by the entrance side of this high-pressure oil passage with hydraulic motor；With

Low pressure oil way, the entrance side of hydraulic pump is in fluid communication by the outlet side of this low pressure oil way with hydraulic motor,

Wherein, each in described hydraulic motor and hydraulic pump includes:

Multiple working chambers, each working chamber is surrounded by cylinder and the piston moved back and forth in described cylinder；

High-pressure main, this high-pressure main includes that multiple first branched bottom and first merges passage, wherein the first branched bottom Being each attached to working chamber, first merges passage is connected to high-pressure oil passage, and the first branched bottom is attached to be then incorporated into together the One merges in passage；

Low-pressure manifold, this low-pressure manifold includes that multiple second branched bottom and second merges passage, wherein the second branched bottom Being each attached to working chamber, second merges passage is connected to low pressure oil way, and the second branched bottom is attached to be then incorporated into together the Two merge in passage；

Multiple high pressure valves, the plurality of high pressure valve is separately positioned in the first branched bottom of high-pressure main, to open and close One branched bottom；

Multiple low pressure valves, the plurality of low pressure valve is separately positioned in the second branched bottom of low-pressure manifold, to open and close Bifurcating channel；With

Housing, this housing accommodates working chamber, high-pressure main, low-pressure manifold, high pressure valve and low pressure valve；

Wherein, at least one in hydraulic pump and hydraulic motor includes the cylinder body being contained in described housing, and described cylinder is arranged on This cylinder interior, and

Wherein, the first branched bottom of at least one in hydraulic pump and hydraulic motor and the second branched bottom are arranged in cylinder body Portion；

Wherein, the first merging passage of the high-pressure main of at least one in hydraulic pump and hydraulic motor is arranged on inside end plate, End face on the direction of the center of rotation axle that described end plate defines at least one in hydraulic pump and hydraulic motor；

Wherein, at least one along hydraulic pump and hydraulic motor of multiple cylinder arrays be arranged circumferentially in cylinder interior, cylinder array In the cylinder that aligns of each direction by the center of rotation axle of at least one along hydraulic pump and hydraulic motor constitute, wherein, High pressure communicating passage is arranged between adjacent two cylinder array in cylinder interior, and wherein, the first branched bottom is connected to Belonging to the working chamber of the cylinder of a cylinder array or two adjacent cylinder arrays, described first branched bottom is via high pressure communicating passage Passage is merged with first.

The TRT of renewable energy type the most according to claim 1,

Wherein, at least one in hydraulic pump and hydraulic motor, the annulus between housing and cylinder body defines low pressure The second merging passage of house steward.

The TRT of renewable energy type the most according to claim 1,

Wherein, the high-pressure main of hydraulic pump is connected directly to the high-pressure main of hydraulic motor by high-pressure oil passage, at high-pressure oil passage In do not limit oil flowing any intervention valve, and

Wherein, the low-pressure manifold of hydraulic pump is connected directly to the low-pressure manifold of hydraulic motor by low pressure oil way, at low pressure oil way In do not limit oil flowing any intervention valve.

The TRT of renewable energy type the most according to claim 1, also includes:

Bypass, described bypass connects high-pressure oil passage and low pressure oil way to bypass hydraulic motor；With

High-pressure pressure-reducing valve, described high-pressure pressure-reducing valve is arranged in bypass.

The TRT of renewable energy type the most according to claim 1, also includes:

At least one accumulator valve；With

At least one accumulator, at least one accumulator described is connected to high-pressure oil passage by least one accumulator valve respectively,

Wherein, at least one accumulator valve opens and closes, with at least one accumulator described wherein and high-pressure oil passage fluid Switch between the state of the state of connection and at least one accumulator wherein said and high-pressure oil passage isolation.

The TRT of renewable energy type the most according to claim 1,

Wherein, when the pressure in working chamber exceedes the pressure in high-pressure oil passage, the high pressure valve of described hydraulic pump is opened, to allow Hydraulic oil flows to high-pressure oil passage by high-pressure main from the working chamber of hydraulic pump.

The TRT of renewable energy type the most according to claim 1,

Wherein, when dropping to below the pressure in low pressure oil way when the pressure in working chamber, the low pressure valve of hydraulic pump is opened, to permit Permitted hydraulic oil and flowed to the working chamber of hydraulic pump by low-pressure manifold from low pressure oil way.

The TRT of renewable energy type the most according to claim 1,

Wherein, at least one in hydraulic pump and the high pressure valve of hydraulic motor and low pressure valve is pressure-operated check valve, described Check valve can be opened by by the pressure reduction of at least one in high pressure valve and low pressure valve, to allow hydraulic oil in one direction Flowing.

The TRT of renewable energy type the most according to claim 1,

Wherein, at least one in hydraulic pump and the high pressure valve of hydraulic motor and low pressure valve is electronic control valve, described electronics control Valve processed is that the face seal can not opened under authorized pressure promotes valve.

The TRT of renewable energy type the most according to claim 1,

Wherein, each low pressure valve of hydraulic pump is normally opened solenoid closed valve, in the pressure in working chamber is less than low pressure oil way Pressure time described solenoid closed valve open passively.

The TRT of 11. renewable energy type according to claim 1, also includes:

Pressure transducer, described pressure transducer measures the pressure of hydraulic oil in high-pressure oil passage；With

Temperature sensor, described temperature sensor is arranged in high-pressure oil passage and low pressure oil way to measure high-pressure oil passage Temperature with the hydraulic oil in low pressure oil way.

The TRT of 12. renewable energy type according to claim 1,

Wherein, described TRT is the wind turbine generator by generating electricity as the wind of regenerative resource.

13. 1 kinds of TRTs by the renewable energy type of renewable energy power generation, including:

Rotary shaft, this rotary shaft is driven by regenerative resource；

Hydraulic pump, this hydraulic pump is driven by rotary shaft；

Hydraulic motor, the pressurised oil that this hydraulic motor is supplied by hydraulic pump drives；

Electromotor, this electromotor is attached to hydraulic motor；

High-pressure oil passage, the outlet side of hydraulic pump is in fluid communication by the entrance side of this high-pressure oil passage with hydraulic motor；With

Low pressure oil way, the entrance side of hydraulic pump is in fluid communication by the outlet side of this low pressure oil way with hydraulic motor,

Wherein, each in described hydraulic motor and hydraulic pump includes:

Multiple working chambers, each working chamber is surrounded by cylinder and the piston moved back and forth in described cylinder；

High-pressure main, this high-pressure main includes that multiple first branched bottom and first merges passage, wherein the first branched bottom Being each attached to working chamber, first merges passage is connected to high-pressure oil passage, and the first branched bottom is attached to be then incorporated into together the One merges in passage；

Low-pressure manifold, this low-pressure manifold includes that multiple second branched bottom and second merges passage, wherein the second branched bottom Being each attached to working chamber, second merges passage is connected to low pressure oil way, and the second branched bottom is attached to be then incorporated into together the Two merge in passage；

Multiple high pressure valves, the plurality of high pressure valve is separately positioned in the first branched bottom of high-pressure main, to open and close One branched bottom；

Multiple low pressure valves, the plurality of low pressure valve is separately positioned in the second branched bottom of low-pressure manifold, to open and close Bifurcating channel；With

Housing, this housing accommodates working chamber, high-pressure main, low-pressure manifold, high pressure valve and low pressure valve；

Wherein, at least one in hydraulic pump and the high pressure valve of hydraulic motor and low pressure valve is electronic control valve, and

Wherein, the TRT of described renewable energy type also includes controller, and described controller controls and piston movement The opening and closing of the electronic control valve that the cycle stage is relevant, to regulate the clean of the hydraulic oil of working chamber discharge in each cycle Volume.

The TRT of 14. renewable energy type according to claim 13,

Wherein, controller changes the number of the working chamber being in idling conditions, to regulate working chamber row in each cycle of operation The net volume amount of the hydraulic oil gone out, the low pressure valve of the working chamber being in idling conditions keeps beating in the whole circulation of piston movement Open.

The TRT of 15. renewable energy type according to claim 13,

Wherein, controller changes least one set low pressure valve and the shut-in time of high pressure valve in each circulation of piston movement, with The net volume amount of the hydraulic oil that regulation working chamber is discharged in each cycle, to belonging to described least one set low pressure valve and high pressure valve In whole valves, the shut-in time changed jointly.

16. 1 kinds of TRTs by the renewable energy type of renewable energy power generation, including:

Rotary shaft, this rotary shaft is driven by regenerative resource；

Hydraulic pump, this hydraulic pump is driven by rotary shaft；

Hydraulic motor, the pressurised oil that this hydraulic motor is supplied by hydraulic pump drives；

Electromotor, this electromotor is attached to hydraulic motor；

High-pressure oil passage, the outlet side of hydraulic pump is in fluid communication by the entrance side of this high-pressure oil passage with hydraulic motor；With

Low pressure oil way, the entrance side of hydraulic pump is in fluid communication by the outlet side of this low pressure oil way with hydraulic motor,

Wherein, each in described hydraulic motor and hydraulic pump includes:

Multiple working chambers, each working chamber is surrounded by cylinder and the piston moved back and forth in described cylinder；

High-pressure main, this high-pressure main includes that multiple first branched bottom and first merges passage, wherein the first branched bottom Being each attached to working chamber, first merges passage is connected to high-pressure oil passage, and the first branched bottom is attached to be then incorporated into together the One merges in passage；

Low-pressure manifold, this low-pressure manifold includes that multiple second branched bottom and second merges passage, wherein the second branched bottom Being each attached to working chamber, second merges passage is connected to low pressure oil way, and the second branched bottom is attached to be then incorporated into together the Two merge in passage；

Multiple high pressure valves, the plurality of high pressure valve is separately positioned in the first branched bottom of high-pressure main, to open and close One branched bottom；

Multiple low pressure valves, the plurality of low pressure valve is separately positioned in the second branched bottom of low-pressure manifold, to open and close Bifurcating channel；With

Housing, this housing accommodates working chamber, high-pressure main, low-pressure manifold, high pressure valve and low pressure valve；

Wherein, at least one in hydraulic pump and the high pressure valve of hydraulic motor and low pressure valve is electronic control valve, and

Wherein, the TRT of described renewable energy type also includes the control controlling the opening and closing of electronic control valve Device, to stop the moment of torsion and flow waves caused by the asymmetric outflow working chamber of hydraulic oil during each circulation of piston movement Dynamic.