CN206845398U - A kind of digital hydraulic fan transmission system - Google Patents
A kind of digital hydraulic fan transmission system Download PDFInfo
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- CN206845398U CN206845398U CN201720601965.5U CN201720601965U CN206845398U CN 206845398 U CN206845398 U CN 206845398U CN 201720601965 U CN201720601965 U CN 201720601965U CN 206845398 U CN206845398 U CN 206845398U
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- hydraulic
- hydraulic motor
- quantitative
- hydraulic pump
- motor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The utility model discloses a kind of digital hydraulic fan transmission system.Blower fan is connected with the first quantitative hydraulic pump, first quantitative hydraulic pump is combined by using multiple constant displacement hydraulic motors of digital encoding scheme and a variable hydraulic motor hydraulic motor in parallel and is connected with generator, and hydraulic motor combination is connected in parallel on the first quantitative hydraulic pump both ends；First quantitative hydraulic pump connects through check valve with the hydraulic pressure input that hydraulic motor combines, accumulator is connected between the first check valve and hydraulic motor combination through stop valve, and fuel tank is connected to hydraulic motor combination and the first quantitative hydraulic pump after the second quantitative hydraulic pump, filter and the second check valve.The utility model is realized from zero to any discharge capacity maximum pump discharge by hydraulic motor combination, realize while stepless time adjustment function by low discharge capacity on variable hydraulic motor efficiency influence be reduced to it is minimum, the efficiency compared with low wind speeds transmission system is improved, while system cost is also greatly reduced.
Description
Technical field
A kind of hydraulic blower transmission system has been the utility model is related to, has been passed more particularly, to a kind of digital liquid pressure fan
Dynamic system.
Background technology
In the prior art, wind-driven generator generally use is gear transmission mode.In order to capture wind energy to greatest extent,
The rotating speed of fan blade needs to change and change with wind speed.Because gear drive gearratio is fixed, thus generator speed also with
Wind speed changes and changed.In order to by generator connecting in parallel with system, it is necessary to using power-converting device by the frequency and voltage conversion of generator
Into the frequency and voltage needed for power network.The continuous change of wind speed can produce shock loading on fan blade axle, and rigid tooth
Wheel transmission can not absorb wind speed constantly change and shock loading on caused axle, thereby result in the gear-driven failure of blower fan.
This further reduces the reliability of blower fan system, the maintenance cost of blower fan is added.
The shortcomings that in order to improve gear transmission mode, static hydraulic drive system are applied to wind-driven generator.Hydrostatic biography
Dynamic system drives variable hydraulic motor usually using quantitative hydraulic pump.Compared with gear transmission mode, static hydraulic drive system
Have the advantage that：1) due to using compressible hydraulic oil as working media, therefore can absorb well wind speed convert and
Caused sharf shock loading, improve the reliability of system；2) using quantitative hydraulic pump and the blower fan of variable hydraulic motor
System has stepless time adjustment function, and hydraulic motor and generator can be made in the case where fan blade rotating speed converts with wind speed
Invariablenes turning speed eliminates power-converting device on synchronous rotational speed, simplifies system architecture；3) liquid of technology maturation is used
Press element to replace the stage-geared of complex and expensive, while eliminate power-converting device, reduce the installation cost of blower fan,
The raising of reliability also reduces the maintenance cost of blower fan simultaneously.
In general, the efficiency of variable hydraulic motor declines to a great extent with the reduction of discharge capacity.For using quantitative hydraulic
The hydrostatic transmissions blower fan system of pump and variable hydraulic motor, the maximum pump discharge of variable hydraulic motor are the specified wind according to blower fan
Speed is come what is designed, and blower fan amount of exports determines power under rated wind speed.There is quite a few time wind speed to be less than in fan operation
Rated wind speed, now variable hydraulic motor is operated in part displacement condition, and efficiency declines；Wind speed is lower, variable hydraulic motor
Discharge capacity it is smaller, efficiency is also lower.For more than 1MW large fan, there is presently no the huge discharge for meeting the power requirement
Variable hydraulic motor.Although the requirement of high-power blower can be met by the way of multiple variable hydraulic motors are in parallel, become
It is more to measure element, system control and optimization are complicated, and cost is higher.
Therefore, efficiency and the cost that reduces transmission system of the static hydraulic drive system in low wind speeds how are improved, is turned into
Those skilled in the art technical barriers urgently to be resolved hurrily.
Utility model content
The utility model provides a kind of digital hydraulic fan transmission system, and the system can improve wind-driven generator low
Transmission efficiency during wind speed, system cost is reduced, and system can be made to realize stepless time adjustment function.
The technical solution adopted in the utility model is：
The utility model include blower fan, the first quantitative hydraulic pump, hydraulic motor combination and the second quantitative hydraulic pump, blower fan with
First quantitative hydraulic pump is connected, and the first quantitative hydraulic pump is combined by hydraulic motor and is connected with generator, and hydraulic motor combines simultaneously
It is associated in the first quantitative hydraulic pump both ends；The hydraulic pressure that the hydraulic pressure output end of first quantitative hydraulic pump combines through check valve and hydraulic motor
Input is connected, and accumulator is connected to through stop valve between the hydraulic pressure input that the first check valve and hydraulic motor combine, fuel tank
The hydraulic pressure output end and first of hydraulic motor combination is connected to after the second quantitative hydraulic pump, filter and the second check valve successively
The hydraulic pressure input of quantitative hydraulic pump.
Described hydraulic motor combination uses the combination of multiple constant displacement hydraulic motors and a variable hydraulic motor parallel connection, often
Individual hydraulic motor is connected with the control of high speed reversal valve.
Combined by hydraulic motor and digitize discharge capacity needed for fan transmission system, specifically successively decreased successively by discharge capacity
The integer part of multiple constant displacement hydraulic motors discharge capacity as needed for, the fractional part of discharge capacity as needed for being used as variable hydraulic motor,
Any discharge capacity needed for being realized with hydraulic motor various combination.
Described fixed displacement hydraulic motor and become the displacement size of displacement hydraulic motor and determined by digitally coded mode,
Discharge capacity V needed for hydraulic motor is equally divided into x equal portions, x size is determined by digital encoding scheme.Then per a displacement size
D：
The constant displacement hydraulic motor chooses the displacement size of corresponding number according to coded system, the variable hydraulic motor
Maximum pump discharge is D.The number of fixed displacement hydraulic motor fixed displacement hydraulic motor can be chosen according to specific actual conditions.
The rotating speed of the quantitative hydraulic pump is obtained by the sensor on fan shaft, required flow is obtained by rotating speed,
Then switching to control described fixed displacement hydraulic motor with the hydraulic motor displacement combination control high speed reversal valve
With the unlatching and closure for becoming displacement hydraulic motor.
Be connected with pressure sensor between described check valve and the input of hydraulic motor combination, described blower fan it is defeated
Velocity sensor is housed on shaft.
Second quantitative hydraulic pump is connected with motor, and benefit is formd by fuel tank, the second quantitative hydraulic pump and motor
Oily device, the second quantitative hydraulic pump work is driven to carry out repairing by motor.
The discharge capacity of the variable hydraulic motor is controlled by oil circuit pressure.The pressure sensor being in series with system working connection
Obtain oil circuit pressure size.
The beneficial effects of the utility model are：
The utility model digitizes the discharge capacity of required variable displacement motor, passes through the constant displacement hydraulic motor of several sizes successively
And a small displacement variable hydraulic motor combination is realized from zero to any discharge capacity maximum pump discharge, realizes stepless time adjustment function
While low discharge capacity is influenceed on variable hydraulic motor efficiency to be reduced to minimum, improve the effect compared with low wind speeds transmission system
Rate, while system cost is also greatly reduced.
Brief description of the drawings
Fig. 1 is digital hydraulic driving type wind-driven generator schematic diagram.
Fig. 2 is the discharge capacity Digitized Structure schematic diagram of variable hydraulic motor.
In figure：1st, blower fan, the 2, first quantitative hydraulic pump, 3, velocity sensor, 4-1, the first check valve are 4-2, second single
To valve, 5, pressure sensor, 6, stop valve, 7, accumulator, 8-1, the first reversal valve, 8-2, the second reversal valve, 8-3, the 3rd change
To valve, 8-4, the 4th reversal valve, 9-1, the first constant displacement hydraulic motor, 9-2, the second constant displacement hydraulic motor, 9-3, the 3rd quantitative liquid
Pressure motor, 9-4, variable hydraulic motor, 10, generator, 11, filter, 12, motor, the 13, second quantitative hydraulic pump, 14,
Fuel tank.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment is described in further detail to the utility model.
As shown in figure 1, the digital hydraulic fan transmission system of the utility model specific implementation mainly includes blower fan 1, the
A certain amount of hydraulic pump 2, velocity sensor 3, pressure sensor 5, the first reversal valve 8-1, the second reversal valve 8-2, the 3rd reversal valve
8-3, the 4th reversal valve 8-4, the first constant displacement hydraulic motor 9-1, the second constant displacement hydraulic motor 9-2, the 3rd constant displacement hydraulic motor 9-
3rd, variable hydraulic motor 9-4, generator 10.The mechanical energy that blower fan 1 obtains passes to the first quantitative hydraulic pump 2 and is converted into hydraulic pressure
Can, the first constant displacement hydraulic motor 9-1, the second constant displacement hydraulic motor 9-2, the 3rd constant displacement hydraulic motor 9-3, variable hydraulic motor
Hydraulic energy transfer is that mechanical energy passes to generator generation electric energy by 9-4.Velocity sensor can obtain the rotating speed (first of blower fan
The rotating speed of constant displacement pump) obtain required motor displacement control the first reversal valve 8-1, the second reversal valve 8-2, the 3rd reversal valve 8-3,
4th reversal valve 8-4 switches.First constant displacement hydraulic motor 9-1, the second constant displacement hydraulic motor 9-2, the 3rd constant displacement hydraulic motor 9-
3rd, variable hydraulic motor 9-4 by the first reversal valve 8-1, the second reversal valve 8-2, the 3rd reversal valve 8-3, the 4th reversal valve 8-4,
5th reversal valve 8-5 switching carrys out controlling switch.Pressure sensor 5 can obtain the pressure in oil circuit.In order to prevent fluid from falling
Flow, check valve 4-1, the second check valve 4-2 are provided with system.
In view of revealing the influence to hydraulic system, include in systems provided with recharging oil device recharging oil device：Fuel tank 14,
Two quantitative hydraulic pumps 13, motor 12, filter 11, the second check valve 4-2.When needing to supplement hydraulic oil to system oil-way,
Motor 12 starts the second quantitative hydraulic pump 13 of control and operated, and the hydraulic oil in fuel tank 14 passes through the second quantitative hydraulic pump 13, mistake
Filter 11, the second check valve 4-2 enter in oil circuit.
Meanwhile the Hydraulic Power Transmission System further comprises the accumulation of energy of control accumulator 7 of accumulator 7 for convenience and release energy
Measure, the second stop valve 6. should be provided between the oil-out oil circuit of 7 and first quantitative hydraulic pump of accumulator 2 when wind speed is higher, it is unnecessary
Hydraulic energy can be stored in accumulator 7；When wind speed is relatively low, the hydraulic energy being stored in accumulator 7 is discharged into system so that
The pressure stability of system.
As shown in Fig. 2 the coded system that the utility model specific implementation is combined using numeral and simulation can be by blower fan system
The discharge capacity digitlization of variable hydraulic motor in system.Variable hydraulic motor can use several (Fig. 2 is exemplified by 3) size successively
Constant displacement hydraulic motor and 1 small displacement variable hydraulic motor.There it can be seen that D3, D2And D1Using digital encoding scheme,
The integer part (nD, wherein n are integer) of discharge capacity needed for constituting, and D0Using analog form, can arbitrarily be adjusted between 0 and D
Section, constitute the fractional part (0~D) of required discharge capacity.Pass through the various combination of hydraulic motor, it is possible to achieve required any row
Amount.The total class of coded system is a lot, illustrates below by taking 8421 coded systems and 1111 coded systems as an example.
As shown in table 1, the discharge capacity of the 8421 coded systems digitlization variable hydraulic motor of use.3 constant displacement hydraulic motors
Discharge capacity be respectively 4D, 2D and D, the discharge capacity of variable displacement motor is 0~D.Maximum pump discharge is 4000cc/rev to example as required, then x
=8, D=500cc/rev.Then pass through the various combination of hydraulic motor, it is possible to achieve from 0 to 8D (0~4000cc/rev)
Any discharge capacity, such as to realize 6.4D discharge capacity, only need to select D3And D2, and D is set0=0.4D；Realize 3.2D row
Amount, only it need to select D2And D1, and D is set0=0.2D.
Table 1
| Required discharge capacity | D3=4D | D2=2D | D1=D | D0=0~D |
| 0~D | 0 | 0 | 0 | 1 |
| D~2D | 0 | 0 | 1 | 1 |
| 2D~3D | 0 | 1 | 0 | 1 |
| 3D~4D | 0 | 1 | 1 | 1 |
| 4D~5D | 1 | 0 | 0 | 1 |
| 5D~6D | 1 | 0 | 1 | 1 |
| 6D~7D | 1 | 1 | 0 | 1 |
| 7D~8D | 1 | 1 | 1 | 1 |
As shown in table 2, the discharge capacity of the 1111 coded systems digitlization variable hydraulic motor of use.3 constant displacement hydraulic motors
Discharge capacity be D, the discharge capacity of variable displacement motor is 0~D.Maximum pump discharge is 4000cc/rev to example as required, then x=4, D=
1000cc/rev.Pass through the various combination of hydraulic motor, it is possible to achieve any row from 0 to 4D (0~4000cc/rev)
Amount, such as 2.4D discharge capacity is realized, only it need to select D2And D1, and D is set0=0.4D；1.2D discharge capacity is realized, only needs to select
Select D1, and D is set0=0.2D.
Table 2
| Required discharge capacity | D3=D | D2=D | D1=D | D0=0~D |
| 0~D | 0 | 0 | 0 | 1 |
| D~2D | 0 | 0 | 1 | 1 |
| 2D~3D | 0 | 1 | 1 | 1 |
| 3D~4D | 1 | 1 | 1 | 1 |
In Tables 1 and 2,1 represents unlatching, and 0 represents closing.
Claims (4)
- A kind of 1. digital hydraulic fan transmission system, it is characterised in that：Including blower fan (1), the first quantitative hydraulic pump (2), liquid Pressure motor combines and the second quantitative hydraulic pump (13), blower fan (1) are connected with the first quantitative hydraulic pump (2), the first quantitative hydraulic pump (2) combined by hydraulic motor and be connected with generator (10), hydraulic motor combination is connected in parallel on the first quantitative hydraulic pump (2) both ends； The hydraulic pressure output end of first quantitative hydraulic pump (2) connects through check valve (4-1) with the hydraulic pressure input that hydraulic motor combines, accumulation of energy Device (7) is connected between the first check valve (4-1) and the hydraulic pressure input of hydraulic motor combination through stop valve (6), fuel tank (14) The liquid of hydraulic motor combination is connected to after the second quantitative hydraulic pump (13), filter (11) and the second check valve (4-2) successively Press the hydraulic pressure input of output end and the first quantitative hydraulic pump (2).
- A kind of 2. digital hydraulic fan transmission system according to claim 1, it is characterised in that：Described hydraulic motor Combination is connected with high quick change using the combination in parallel of multiple constant displacement hydraulic motors and a variable hydraulic motor, each hydraulic motor Controlled to valve.
- A kind of 3. digital hydraulic fan transmission system according to claim 1, it is characterised in that：Described check valve Pressure sensor (5) is connected between the input of (4-1) and hydraulic motor combination, is filled on the output shaft of described blower fan (1) There is velocity sensor (3).
- A kind of 4. digital hydraulic fan transmission system according to claim 1, it is characterised in that：Described second quantitative liquid Press pump (13) is connected with motor (12), and repairing is formd by fuel tank (14), the second quantitative hydraulic pump (13) and motor (12) Device, the second quantitative hydraulic pump (13) work is driven to carry out repairing by motor (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720601965.5U CN206845398U (en) | 2017-05-26 | 2017-05-26 | A kind of digital hydraulic fan transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720601965.5U CN206845398U (en) | 2017-05-26 | 2017-05-26 | A kind of digital hydraulic fan transmission system |
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| Publication Number | Publication Date |
|---|---|
| CN206845398U true CN206845398U (en) | 2018-01-05 |
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ID=60797726
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720601965.5U Active CN206845398U (en) | 2017-05-26 | 2017-05-26 | A kind of digital hydraulic fan transmission system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107228049A (en) * | 2017-05-26 | 2017-10-03 | 浙江大学 | digital hydraulic fan transmission system |
| CN109518647A (en) * | 2018-10-23 | 2019-03-26 | 福建龙马环卫装备股份有限公司 | A kind of dust suppression truck control device and dust suppression vehicle |
-
2017
- 2017-05-26 CN CN201720601965.5U patent/CN206845398U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107228049A (en) * | 2017-05-26 | 2017-10-03 | 浙江大学 | digital hydraulic fan transmission system |
| CN109518647A (en) * | 2018-10-23 | 2019-03-26 | 福建龙马环卫装备股份有限公司 | A kind of dust suppression truck control device and dust suppression vehicle |
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