CN218030436U - Closed loop hydraulic pitch control system using oil cylinder with uniform cross section - Google Patents
Closed loop hydraulic pitch control system using oil cylinder with uniform cross section Download PDFInfo
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- CN218030436U CN218030436U CN202222417346.4U CN202222417346U CN218030436U CN 218030436 U CN218030436 U CN 218030436U CN 202222417346 U CN202222417346 U CN 202222417346U CN 218030436 U CN218030436 U CN 218030436U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model relates to a wind power equipment technical field specifically is a closed return circuit hydraulic pressure of using uniform cross section hydro-cylinder becomes oar system, include: the port of the low-pressure energy accumulator is respectively connected with the ports of the first check valve, the second check valve, the first safety valve, the second safety valve and the low-pressure shuttle valve through oil pipes; the port of the low-pressure shuttle valve is respectively connected with the ports of the two-way electromagnetic stop valve, the one-way electromagnetic stop valve and the servo pump through oil pipes; the uniform-section composite oil cylinder comprises a first composite oil cylinder cavity and a second composite oil cylinder cavity; the beneficial effects are that: the sectional areas of the two sides of the composite oil cylinder are equal, the composite oil cylinder has the advantages of a double-extension-rod oil cylinder, a long space is not needed, the sectional areas of oil cylinder cavities of the two sides are equal, and a traditional oil tank can be swung away, so that the system is small in occupied space and can be directly installed in a hub, a servo motor can automatically adjust the rotating speed according to the pressure and the flow of the system, the servo motor does not run at full power during slow adjustment, the power consumption is low, and the electric energy consumption is saved.
Description
Technical Field
The utility model relates to a wind power equipment technical field specifically is a closed return circuit hydraulic pressure becomes oar system of use uniform cross section hydro-cylinder.
Background
The hydraulic variable pitch system is used as one of core parts of a large-scale wind turbine generator control system, has very important function on safe, stable and efficient operation of the generator, and stable variable pitch control becomes one of hot spots and difficulties of the current large-scale wind turbine generator control technology research;
the existing hydraulic pitch control system is an open system, and has the disadvantages of more components, high cost, more fault points and lower efficiency: the hydraulic station is separated from the control system, cannot be placed in the hub to rotate along with the blades, is placed in the engine room and is connected to an oil cylinder in the hub through an oil pipeline and a central rotary joint;
the difference between the areas of a rod cavity and a rodless cavity of a traditional oil cylinder is large, hydraulic oil in an oil tank is changed greatly when the oil cylinder retracts and extends, the volume of the oil tank is large, and crowding can be increased in a limited space of a machine room.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an use closed return circuit hydraulic pressure of uniform cross section hydro-cylinder to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a closed-loop hydraulic pitch control system using a constant-section oil cylinder comprises the following components:
the utility model provides an use closed circuit hydraulic pressure of uniform cross section hydro-cylinder to become oar system which characterized in that: the closed loop hydraulic pitch control system using the oil cylinder with the uniform cross section comprises:
the port of the low-pressure energy accumulator is respectively connected with the ports of the first check valve, the second check valve, the first safety valve, the second safety valve and the low-pressure shuttle valve through oil pipes;
the port of the low-pressure shuttle valve is respectively connected with the ports of the two-way electromagnetic stop valve, the one-way electromagnetic stop valve and the servo pump through oil pipes;
the constant-section composite oil cylinder comprises a first composite oil cylinder cavity and a second composite oil cylinder cavity, wherein a port of the first composite oil cylinder cavity is connected with the other port of the one-way electromagnetic stop valve through an oil pipe, and a port of the second composite oil cylinder cavity is connected with the other port of the two-way electromagnetic stop valve through an oil pipe.
Preferably, the other port of the first one-way valve is connected with the other ports of the servo pump, the first safety valve, the low-pressure shuttle valve and the two-way electromagnetic stop valve through oil pipes.
Preferably, the port of the servo pump is respectively connected with the ports of the bidirectional electromagnetic stop valve, the servo motor, the low-pressure energy accumulator and the unidirectional electromagnetic stop valve through oil pipes.
Preferably, the other end port of the second one-way valve is respectively connected with the other end ports of the servo pump, the second safety valve, the low-pressure shuttle valve and the one-way electromagnetic stop valve through oil pipes.
Preferably, the port of the first safety valve is connected with the ports of the second safety valve, the low-pressure shuttle valve and the two-way electromagnetic stop valve through oil pipes, and the port of the second safety valve is connected with the ports of the low-pressure shuttle valve, the one-way electromagnetic stop valve and the servo pump through oil pipes.
Preferably, the motor is a servo motor.
Preferably, the motor drives the hydraulic pump to rotate, and reversing action of the oil cylinder is realized by switching an inlet and an outlet of the hydraulic pump.
Preferably, the inlet and the outlet of the hydraulic pump can realize the switching of oil inlet and outlet by controlling the rotating direction of the motor.
Preferably, the rotation direction of the motor keeps a direction, and the oil port switching of the pump is realized by adjusting through a variable mechanism of the pump.
Preferably, the pump is selected from a gear pump and a plunger pump which rotate in two directions, and the variable displacement pump can rotate in one direction to realize oil port switching.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides an use closed return circuit hydraulic pressure of uniform cross section hydro-cylinder to become oar system, compound hydro-cylinder both sides sectional area equals, there is the advantage of two extension bar hydro-cylinders, do not need longer space again, servo motor can be according to system pressure flow automatically regulated rotational speed, during slow speed adjusting, servo motor is not in the operation of full power, the consumption is lower, save electric energy consumption, can put away traditional oil tank under the condition that compound hydro-cylinder both sides sectional area equals, adopt the energy storage ware as malleation oil tank, occupation space is little, malleation oil tank pre-charge is behind the normal pressure after calculating centrifugal force and gravity, the system can absorb hydraulic oil in the oil tank at any angle, need not install the oil tank in the cabin, but the direct mount is in wheel hub.
Drawings
FIG. 1 is a hydraulic schematic diagram of a hydraulic pitch system;
FIG. 2 is a walking diagram of a hydraulic variable pitch system blade collecting oil path;
FIG. 3 is a walking diagram of a blade opening oil way of the hydraulic variable-pitch system;
fig. 4 is a cross-sectional view of the composite oil cylinder structure of the present invention.
In the figure: the hydraulic control system comprises a low-pressure energy accumulator 1, a first one-way valve 2, a second one-way valve 3, a servo motor 4, a servo pump 5, a first safety valve 6, a second safety valve 7, a low-pressure shuttle valve 8, a two-way electromagnetic stop valve 9, a one-way electromagnetic stop valve 10, a constant-section composite oil cylinder 11, a first composite oil cylinder cavity 12 and a second composite oil cylinder cavity 13.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
Referring to fig. 1 to 3, the present invention provides a technical solution: the utility model provides an use closed-loop hydraulic pressure of uniform cross section hydro-cylinder to become oar system, uses the closed-loop hydraulic pressure of uniform cross section hydro-cylinder to become oar system includes:
the utility model provides an use closed circuit hydraulic pressure of uniform cross section hydro-cylinder to become oar system which characterized in that: the closed loop hydraulic pitch control system using the uniform-section oil cylinder comprises:
a port of the low-pressure energy accumulator 1 is respectively connected with ports of a first one-way valve 2, a second one-way valve 3, a first safety valve 6, a second safety valve 7 and a low-pressure shuttle valve 8 through oil pipes, and the other port of the first one-way valve 2 is respectively connected with the other ports of a servo pump 5, the first safety valve 6, the low-pressure shuttle valve 8 and a two-way electromagnetic stop valve 9 through oil pipes;
a port of the low-pressure shuttle valve 8 is respectively connected with ports of the two-way electromagnetic stop valve 9, the one-way electromagnetic stop valve 10 and the servo pump 5 through oil pipes, a port of the servo pump 5 is respectively connected with ports of the two-way electromagnetic stop valve 9, the servo motor 4, the low-pressure energy accumulator 1 and the one-way electromagnetic stop valve 10 through oil pipes, a port of the other end of the second one-way valve 3 is respectively connected with ports of the servo pump 5, the second safety valve 7, the low-pressure shuttle valve 8 and the one-way electromagnetic stop valve 10 through oil pipes, a port of the first safety valve 6 is respectively connected with ports of the second safety valve 7, the low-pressure shuttle valve 8 and the two-way electromagnetic stop valve 9 through oil pipes, and a port of the second safety valve 7 is respectively connected with ports of the low-pressure shuttle valve 8, the one-way electromagnetic stop valve 10 and the servo pump 5 through oil pipes;
the constant-section composite oil cylinder 11 comprises a first composite oil cylinder cavity 12 and a second composite oil cylinder cavity 13, a port of the first composite oil cylinder cavity 12 is connected with the other port of the one-way electromagnetic stop valve 10 through an oil pipe, and a port of the second composite oil cylinder cavity 13 is connected with the other port of the two-way electromagnetic stop valve 9 through an oil pipe.
The hydraulic pitch control system is mainly applied to a fan pitch control system and provides hydraulic power for a fan pitch control oil cylinder. This hydraulic system is mainly by low pressure energy storage ware 1, servo motor 4, servo pump 5, two-way electromagnetism stop valve 9, one-way electromagnetism stop valve 10, first relief valve 6, second relief valve 7, the integration such as constant cross-section compound hydro-cylinder 11, the system integration level is high, the low power consumption is little, the speed range is wide, can low-power adjust at a slow speed, also can surpass the rotational speed of frequently carrying out the feathering, after having a power failure suddenly, can be driven the motor by super battery and rotate, play the function of urgent feathering, this system's hydro-cylinder business turn over oil mass is equal, only need a small amount of mends oil and can accomplish the system operation, do not need too big oil tank or energy storage ware.
When the hydraulic drive device is used, as shown in fig. 2, when the propeller is retracted, the servo motor 4 drives the servo pump 5 to rotate, hydraulic oil is discharged from the right side of the servo pump 5, the two-way electromagnetic stop valve 9 and the one-way electromagnetic stop valve 10 lose power, high-pressure hydraulic oil passes through the one-way electromagnetic stop valve 10, enters the inside of the uniform-section composite oil cylinder 11 from the first composite oil cylinder cavity 12, pushes the uniform-section composite oil cylinder 11 to extend out, hydraulic oil in the second composite oil cylinder cavity 13 is pushed back to flow out, a part of hydraulic oil flows into an oil inlet of the servo pump 5 through a loop, and is converted into high-pressure oil through the servo pump 5 to continuously push the uniform-section composite oil cylinder 11 to extend out; another part of the hydraulic oil flows into the low pressure accumulator 1 through the low pressure shuttle valve 8. In the whole adjusting process, the extending speed of the uniform-section composite oil cylinder 11 is controlled by the rotating speed of the servo motor 4, the rotating speed of the servo motor 4 is calculated and controlled by the controller according to the angle of the fan blade and the wind power, a closed loop is formed according to a feedback signal of a displacement sensor in the uniform-section composite oil cylinder 11, after a set angle is reached, the servo motor 4 stops rotating, the bidirectional electromagnetic stop valve 9 and the unidirectional electromagnetic stop valve 10 are powered on, the uniform-section composite oil cylinder 11 is locked, and the rotating angle of the fan blade is fixed. In the process, the low-pressure shuttle valve 8 is taken into safety consideration, and the pump body is prevented from being damaged by overhigh pressure of a suction port of the servo pump 5 due to the fact that the capacity difference between the oil inlet and the oil outlet of the uniform-section composite oil cylinder 11 is caused by machining errors.
As shown in fig. 3, when the paddle is opened, the servo motor 4 drives the servo pump 5 to rotate, hydraulic oil is discharged from the left side of the servo pump 5, the electromagnetic stop valve 7 is powered off, and the electromagnetic valve 8 is powered on. Hydraulic oil flows out from the left side of the hydraulic pump, flows into a second composite oil cylinder cavity 13 through a two-way electromagnetic stop valve 9, pushes the uniform-section composite oil cylinder 11 to retract, and hydraulic oil in the second composite oil cylinder cavity 13 is reversely pushed, flows out through a one-way electromagnetic stop valve 10, flows into an oil inlet on the right side of a servo pump 5 through a loop, is converted into high-pressure oil through the servo pump 5, and continuously pushes the uniform-section composite oil cylinder 11 to extend out; in the whole adjusting process, the extending speed of the uniform-section composite oil cylinder 11 is controlled by the rotating speed of the servo motor 4, and the rotating speed of the servo motor 4 is calculated and controlled by the controller according to the fan blade angle and the wind power. And a closed loop is formed according to a feedback signal of a displacement sensor in the uniform-section composite oil cylinder 11, after a set angle is reached, the servo motor 4 stops rotating, the bidirectional electromagnetic stop valve 9 is powered on, the unidirectional electromagnetic stop valve 10 is powered off, the uniform-section composite oil cylinder 11 is locked, and the rotation angle of the fan blade is fixed.
As shown in fig. 2, when the system is suddenly powered off or needs emergency feathering, the backup power supply of the super capacitor drives the servo motor 4 to rotate in the forward direction rapidly, the uniform-section composite oil cylinder 11 extends out, the rotation is stopped after the uniform-section composite oil cylinder reaches a position, the one-way electromagnetic stop valve 10 cannot feed oil in the reverse direction in an unpowered state, hydraulic oil in the first composite oil cylinder cavity 12 is locked, the uniform-section composite oil cylinder 11 cannot retract, and the emergency feathering is completed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides an use closed circuit hydraulic pressure of uniform cross section hydro-cylinder to become oar system which characterized in that: the closed loop hydraulic pitch control system using the oil cylinder with the uniform cross section comprises:
the port of the low-pressure energy accumulator (1) is respectively connected with the ports of the first check valve (2), the second check valve (3), the first safety valve (6), the second safety valve (7) and the low-pressure shuttle valve (8) through oil pipes;
the port of the low-pressure shuttle valve (8) is respectively connected with the ports of the two-way electromagnetic stop valve (9), the one-way electromagnetic stop valve (10) and the servo pump (5) through oil pipes;
the constant-section composite oil cylinder (11) comprises a first composite oil cylinder cavity (12) and a second composite oil cylinder cavity (13), a port of the first composite oil cylinder cavity (12) is connected with the other port of the one-way electromagnetic stop valve (10) through an oil pipe, and a port of the second composite oil cylinder cavity (13) is connected with the other port of the two-way electromagnetic stop valve (9) through an oil pipe.
2. The closed-circuit hydraulic pitch system using the oil cylinder with the uniform cross section as claimed in claim 1, wherein: and the other port of the first one-way valve (2) is respectively connected with the other ports of the servo pump (5), the first safety valve (6), the low-pressure shuttle valve (8) and the two-way electromagnetic stop valve (9) through oil pipes.
3. The closed-circuit hydraulic pitch system using the uniform-section oil cylinder according to claim 2, characterized in that: and the port of the servo pump (5) is respectively connected with the ports of the two-way electromagnetic stop valve (9), the servo motor (4), the low-pressure energy accumulator (1) and the one-way electromagnetic stop valve (10) through oil pipes.
4. The closed-circuit hydraulic pitch system using the oil cylinder with the uniform cross section as claimed in claim 3, wherein: and the other end port of the second one-way valve (3) is respectively connected with the other end ports of the servo pump (5), the second safety valve (7), the low-pressure shuttle valve (8) and the one-way electromagnetic stop valve (10) through oil pipes.
5. The closed-circuit hydraulic pitch system using the uniform-section oil cylinder according to claim 4, wherein: the port of the first safety valve (6) is connected with the ports of the second safety valve (7), the low-pressure shuttle valve (8) and the two-way electromagnetic stop valve (9) through oil pipes respectively, and the port of the second safety valve (7) is connected with the ports of the low-pressure shuttle valve (8), the one-way electromagnetic stop valve (10) and the servo pump (5) through oil pipes respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222417346.4U CN218030436U (en) | 2022-09-13 | 2022-09-13 | Closed loop hydraulic pitch control system using oil cylinder with uniform cross section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222417346.4U CN218030436U (en) | 2022-09-13 | 2022-09-13 | Closed loop hydraulic pitch control system using oil cylinder with uniform cross section |
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| Publication Number | Publication Date |
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| CN218030436U true CN218030436U (en) | 2022-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222417346.4U Active CN218030436U (en) | 2022-09-13 | 2022-09-13 | Closed loop hydraulic pitch control system using oil cylinder with uniform cross section |
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| CN (1) | CN218030436U (en) |
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- 2022-09-13 CN CN202222417346.4U patent/CN218030436U/en active Active
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