CN215596379U - Control device for gear box - Google Patents
Control device for gear box Download PDFInfo
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- CN215596379U CN215596379U CN202122313179.4U CN202122313179U CN215596379U CN 215596379 U CN215596379 U CN 215596379U CN 202122313179 U CN202122313179 U CN 202122313179U CN 215596379 U CN215596379 U CN 215596379U
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- mechanical pump
- stage displacement
- pump
- speed
- displacement
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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 provides a control device for a gearbox, the gearbox comprising a mechanical pump and an electric pump, the mechanical pump having a first stage displacement and a second stage displacement, the first stage displacement being less than the second stage displacement, the control device comprising: the mechanical pump control module is used for controlling the mechanical pump to operate at a first-stage displacement when the oil pressure is higher than an oil pressure threshold value, and controlling the mechanical pump to operate at a second-stage displacement when the oil pressure is lower than the oil pressure threshold value. By adopting the mechanical pump with two-stage displacement, different displacements are applied under different working conditions, the lubricating requirements of rated working conditions and special working conditions are considered, and the defects of lubrication under low-speed and/or low-temperature conditions and excessive oil quantity under the rated working conditions are avoided.
Description
Technical Field
The utility model relates to a control device, in particular to a control device for an oil pump of a wind power gear box.
Background
The wind power gear box is used for transmitting torque between a main shaft connected with a wind wheel and an engine, and generally adopts a planetary gear train to realize speed increase. During operation of the gearbox, the various components of the planetary gear set, in particular the gear meshes and bearings, require lubrication to ensure proper operation of the gearbox. In current wind power gearbox systems, there is a dual oil pump design of a mechanical pump powered by rotation of the wind wheel and an electric pump completely powered by external electricity.
However, in the case of a low oil temperature, the electric pump is not turned on or operates at a low speed, and provides a low flow rate, so that the mechanical pump is mainly responsible for the circulation of the lubricant in the gearbox to achieve lubrication. Typically the displacement of the mechanical pump is designed according to the rated load and rated speed of the gearbox and the flow of the mechanical pump is determined entirely by the input speed of the gearbox. However, when the input speed of the gearbox is low, the rotational speed of the mechanical pump is also low and thus a sufficient amount of oil cannot be provided. The lack of oil will result in insufficient lubrication of the gears and bearings in the gearbox, which affects the operation and life of the gearbox.
To overcome this problem, if the displacement of the mechanical pump is designed for low input speeds, this in turn leads to excessive flow at rated conditions, which in turn leads to higher oil pressure, increased risk of oil leakage and increased energy consumption of the gearbox.
SUMMERY OF THE UTILITY MODEL
The utility model provides a control device of a gear box, aiming at solving the defect that different lubrication requirements under rated working conditions and special working conditions are difficult to realize by adopting a mechanical pump with fixed displacement in the prior art, and the control device can adapt to different lubrication requirements under the rated working conditions and the special working conditions.
The purpose of the utility model is realized by the following technical scheme:
the present invention also provides a control device for a gearbox, the gearbox including a mechanical pump and an electric pump, characterized in that the mechanical pump has a first-stage displacement and a second-stage displacement, the first-stage displacement being smaller than the second-stage displacement, the control device including:
the sensor module is used for detecting the oil pressure of lubricating oil of the gearbox, the low oil pressure generally means that the rotating speed of the wind wheel is low and the rotating speed of the electric pump is zero or close to zero, at the moment, the lubricating system almost completely depends on the mechanical pump, the input speed of the wind wheel is low, and the rotating speed of the mechanical pump is low.
And the mechanical pump control module is used for controlling the mechanical pump to operate at the first-stage displacement when the oil pressure is higher than the oil pressure threshold value and controlling the mechanical pump to operate at the second-stage displacement when the oil pressure is lower than the oil pressure threshold value.
The present invention also provides a control device for a gearbox, the gearbox including a mechanical pump and an electric pump, characterized in that the mechanical pump has a first-stage displacement and a second-stage displacement, the first-stage displacement being smaller than the second-stage displacement, the control device including:
the sensor module is used for detecting the input speed of the wind wheel and the rotating speed of the electric pump;
and the mechanical pump control module is used for controlling the mechanical pump to operate at the first-stage displacement when the input speed of the wind wheel is greater than or equal to the speed threshold value, and controlling the mechanical pump to operate at the second-stage displacement when the input speed of the wind wheel is less than the speed threshold value and the rotating speed of the electric pump is less than the rotating speed threshold value.
The present invention also provides a control device for a gearbox, the gearbox including a mechanical pump and an electric pump, characterized in that the mechanical pump has a first-stage displacement and a second-stage displacement, the first-stage displacement being smaller than the second-stage displacement, the control device including:
the sensor module is used for detecting the input speed and the oil temperature of the wind wheel;
and the mechanical pump control module is used for controlling the mechanical pump to operate at the first-stage displacement when the input speed is greater than or equal to the speed threshold and the oil temperature is higher than the oil temperature threshold, and controlling the mechanical pump to operate at the second-stage displacement when the input speed is less than the speed threshold and the oil temperature is lower than the oil temperature threshold.
Preferably, the speed threshold is at least 30% of the rated speed.
Preferably, the speed threshold is at least 50% of the rated speed.
Preferably, the mechanical pump is a two-stage variable displacement pump.
Preferably, the mechanical pump is a continuously variable pump.
The utility model has the technical effects that: by adopting the mechanical pump with two-stage displacement, different displacements are applied under different working conditions, the lubricating requirements of rated working conditions and special working conditions are considered, and the defects of lubrication under low-speed and/or low-temperature conditions and excessive oil quantity under the rated working conditions are avoided.
Drawings
Fig. 1 is a block diagram showing a control apparatus according to an embodiment of the present invention;
FIG. 2 shows a schematic diagram of the control logic of the control device of an embodiment of the present invention;
fig. 3 shows a schematic diagram of the control logic of a control device according to another embodiment of the utility model.
Detailed Description
Reference is now made to fig. 1-3, which are incorporated in and constitute a further illustration of an embodiment of the present invention.
Referring to fig. 1, there is shown a block diagram of a control apparatus of a gearbox including a mechanical pump 1 and an electric pump 2, in which the mechanical pump 1 has a first-stage displacement and a second-stage displacement, the first-stage displacement being smaller than the second-stage displacement, according to an embodiment of the present invention, the control apparatus including: the sensor module 3 is used for detecting the oil pressure of lubricating oil of the gearbox; and a mechanical pump control module 4 for controlling the mechanical pump 1 to operate at a first stage displacement when the oil pressure is above the oil pressure threshold, and for controlling the mechanical pump 1 to operate at a second stage displacement when the oil pressure is below the oil pressure threshold. In this embodiment, the mechanical pump is a continuously variable pump, and it is possible to achieve that the pressure of the lubricating oil is stabilized around a certain value.
Referring to fig. 2, in this embodiment, the specific control logic of the control device is as follows:
step 101: the sensor module detects the oil pressure of the lubricating oil of the gearbox, and generally speaking, the oil pressure can reflect the current operating state of the gearbox, for example, when the input rotating speed of the wind wheel is low and the electric pump does not work, the oil pressure of the lubricating oil is low, and at the moment, the mechanical pump is needed to supply oil with a large displacement.
Step 102: the mechanical pump control module judges whether the oil pressure is higher than an oil pressure threshold value, if so, the gear box is considered to be in a normal working state, the lubricating oil is sufficiently provided, and then the operation goes to step 103; if not, the supply of the lubricating oil to the gear box is considered to be insufficient, and the process proceeds to step 104.
Step 103: the mechanical pump control module controls the mechanical pump to operate at a smaller displacement (e.g., a first stage displacement) to avoid a higher oil pressure due to a larger amount of oil.
Step 104: the mechanical pump control module controls the mechanical pump to operate at a larger displacement (e.g., a second stage displacement) to avoid insufficient lubrication.
Referring to fig. 1 and 3, in addition to monitoring only oil pressure, in another embodiment, the control device may determine the operating condition of the gearbox by monitoring the input speed of the wind rotor and the rotational speed of the electric pump. Specifically, the sensor module 3 is used for detecting the input speed of the wind wheel and the rotating speed of the electric pump; and the mechanical pump control module 4 is used for controlling the mechanical pump 1 to operate at the first-stage displacement when the input speed of the wind wheel is greater than or equal to the speed threshold value, and controlling the mechanical pump 1 to operate at the second-stage displacement when the input speed of the wind wheel is less than the speed threshold value and the rotating speed of the electric pump 2 is less than the rotating speed threshold value. In this embodiment, the mechanical pump is a two-stage variable displacement pump.
The control logic of the control device in this embodiment is as follows:
step 201: the input speed of the wind wheel and the rotation speed of the electric pump are detected, and if the rotation speed of the electric pump is low or even does not work, the lubrication is completely realized by the mechanical pump. The operation of the mechanical pump depends on the operation of the wind wheel, so the input speed of the wind wheel is an important index for measuring the working condition of the mechanical pump.
Step 202: the mechanical pump control module judges whether the input speed is greater than or equal to the speed threshold value, if so, the step 203 is executed; if not, go to step 204.
Step 203: the mechanical pump control module controls the mechanical pump to operate at a smaller displacement (e.g., a first stage displacement) to avoid a higher oil pressure due to a larger amount of oil.
Step 204: the mechanical pump control module judges whether the rotating speed of the electric pump is smaller than a rotating speed threshold value, if so, the electric pump cannot provide enough oil, and the step 205 is entered; if not, the step 203 is executed if the electric pump can substantially ensure the oil supply of the gearbox.
Step 205: the mechanical pump control module controls the mechanical pump to operate at a larger displacement (e.g., a second stage displacement) to avoid insufficient lubrication.
In yet another embodiment, the gearbox still includes a mechanical pump having a first stage displacement and a second stage displacement, the first stage displacement being less than the second stage displacement, and an electric pump. But the control device includes: the sensor module is used for detecting the input speed and the oil temperature of the wind wheel; and the mechanical pump control module is used for controlling the mechanical pump to operate at the first-stage displacement when the input speed is greater than or equal to a speed threshold value (for example, 50% of a rated speed) and the oil temperature is higher than an oil temperature threshold value, and controlling the mechanical pump to operate at the second-stage displacement when the input speed is less than the speed threshold value and the oil temperature is lower than the oil temperature threshold value. In order to monitor the working condition of the gearbox more accurately, the detection of the input speed of the wind wheel and the oil temperature is introduced. The detection of the oil temperature mainly consists in determining the state of the electric pump, and normally, in the case of a low oil temperature, the electric pump does not substantially operate or operates at an extremely low speed. The input speed of the wind rotor has a certain relation with the input parameters of the mechanical pump, e.g. a slower input speed of the wind rotor means that the mechanical pump needs to be operated at a larger displacement to provide sufficient lubrication oil.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications are within the scope of the utility model.
Claims (7)
1. A control device for a gearbox including a mechanical pump and an electric pump, wherein the mechanical pump has a first stage displacement and a second stage displacement, the first stage displacement being less than the second stage displacement, the control device comprising:
a sensor module for detecting the oil pressure of the lubricating oil of the gear box,
and the mechanical pump control module is used for controlling the mechanical pump to operate at the first-stage displacement when the oil pressure is higher than the oil pressure threshold value and controlling the mechanical pump to operate at the second-stage displacement when the oil pressure is lower than the oil pressure threshold value.
2. A control device for a gearbox including a mechanical pump and an electric pump, wherein the mechanical pump has a first stage displacement and a second stage displacement, the first stage displacement being less than the second stage displacement, the control device comprising:
the sensor module is used for detecting the input speed of the wind wheel and the rotating speed of the electric pump;
and the mechanical pump control module is used for controlling the mechanical pump to operate at the first-stage displacement when the input speed of the wind wheel is greater than or equal to the speed threshold value, and controlling the mechanical pump to operate at the second-stage displacement when the input speed of the wind wheel is less than the speed threshold value and the rotating speed of the electric pump is less than the rotating speed threshold value.
3. A control device for a gearbox including a mechanical pump and an electric pump, wherein the mechanical pump has a first stage displacement and a second stage displacement, the first stage displacement being less than the second stage displacement, the control device comprising:
the sensor module is used for detecting the input speed and the oil temperature of the wind wheel;
and the mechanical pump control module is used for controlling the mechanical pump to operate at the first-stage displacement when the input speed is greater than or equal to the speed threshold and the oil temperature is higher than the oil temperature threshold, and controlling the mechanical pump to operate at the second-stage displacement when the input speed is less than the speed threshold and the oil temperature is lower than the oil temperature threshold.
4. A control arrangement according to claim 3, characterised in that the speed threshold is at least 30% of the rated speed.
5. The control apparatus of claim 4, wherein the speed threshold is at least 50% of rated speed.
6. Control device according to any of claims 1-5, characterized in that the mechanical pump is a two-stage variable displacement pump.
7. A control arrangement according to any one of claims 1 to 5, characterised in that the mechanical pump is a continuously variable pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122313179.4U CN215596379U (en) | 2021-09-23 | 2021-09-23 | Control device for gear box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122313179.4U CN215596379U (en) | 2021-09-23 | 2021-09-23 | Control device for gear box |
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| Publication Number | Publication Date |
|---|---|
| CN215596379U true CN215596379U (en) | 2022-01-21 |
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| CN202122313179.4U Active CN215596379U (en) | 2021-09-23 | 2021-09-23 | Control device for gear box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023045705A1 (en) * | 2021-09-23 | 2023-03-30 | 采埃孚(天津)风电有限公司 | Control device for gearbox |
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2021
- 2021-09-23 CN CN202122313179.4U patent/CN215596379U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023045705A1 (en) * | 2021-09-23 | 2023-03-30 | 采埃孚(天津)风电有限公司 | Control device for gearbox |
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