CN201714599U - Process blade - Google Patents

Abstract

The utility model discloses a process blade used for pitch tests for wind turbine generator systems. The process blade at least comprises a long column-shaped main beam, a block-up seat, a long column-shaped extension beam and a tail end counterbalance body, wherein one end of the block-up seat is connected with a pitch control bearing, and the other end of the block-up seat is connected to the end part of the main beam; the column-shaped extension beam is connected to the tail end of the main beam; and the tail end counterbalance body is arranged at the tail end of the main beam. The utility model has the benefits that parameters such as mass, gravity center, moment of inertia and the like of the fan blade can be accurately simulated by virtue of the process blade provided by the utility model. Besides, the process blade has the advantages of simple structure, economy, safety, strong applicability and simple and convenient operation, and can effectively satisfy the requirements of pitch tests of wind turbine generator systems according to the GB/T 21407-2008 'Doubly-fed Constant Frequency Wind Turbine Generator System'.

Description

a craft blade

technical field

The utility model belongs to the production field of wind power generators, in particular to a craft blade for the variable pitch test of wind power generators.

Background technique

At present, according to the requirements of GB/T 21407-2008 "Double-fed Constant Frequency Wind Turbine Generator Set", the production of wind turbine sets needs to be tested for variable pitch mechanisms. Cylinder test, because the fan blades are all longer than 35 meters, the test with it has extremely high requirements on the width of the factory building, and the open-air operation does not meet the test requirements, and the multiple loading required by the test cannot be achieved, and the economy and operability are poor. Manufacturers who use large-diameter cylinders do not take into account the important parameter of fan blades - the moment of inertia. Large-diameter cylinders cannot realize the synchronous increase of the moment of inertia and the multiple of mass, and cannot perform high-level simulation of fan blades, which reduces the pitch change. The accuracy of the test, and the length of this structure is greater than 20 meters, the requirements for the width of the factory building are relatively high, the center of gravity deviates greatly, and the installation and operation are more difficult.

Contents of the invention

In order to solve the above technical deficiencies, the utility model provides a process blade with the advantages of simple structure, convenient assembly, good applicability, economy and safety, which can conveniently realize various quality specifications and effectively meet the parameter requirements of fan blades. At present, the process blades used in the variable pitch test of wind turbines must meet the requirements of process parameters such as mass, center of gravity, and moment of inertia, as well as issues such as applicability, operability, and use safety.

The utility model is achieved through the following measures:

A process blade of the present invention, which is connected to the pitch bearing, is characterized in that it at least includes:

a main girder in the shape of a long column;

An elevated seat, one end is connected with the pitch bearing, and the other end is connected with the end of the main girder;

an extension beam, in the form of a long column, attached at the end of the main beam; and

A tail end balance weight body is arranged on the tail end of the main girder or the extension girder.

In the process blade of the present utility model, at least one fine-tuning counterweight is arranged at the tail end of the main beam or the extension beam or the tail end counterweight body.

In the process blade of the utility model, the raised seat is a hollow structure and is connected with the main beam.

In the process blade of the present utility model, the tail-end counterweights are several pieces of the same mass, and are evenly connected to the tail end of the main beam or the extension beam.

In the process blade of the utility model, the main girder is provided with a ring sleeve for hoisting.

In the process blade of the utility model, the tail end weight body and the fine-tuning weight block are connected to the tail end of the main beam or the extension beam through a connecting flange plate.

In the process blade of the present utility model, the extension beam is connected with the main beam and the tail-end weight body through connecting flange plates at both ends.

In the process blade of the utility model, at least two reinforcing ribs are respectively arranged at both ends of the main beam.

In the process blade of the utility model, the reinforcing rib is covered with a conical reinforcing sleeve.

The beneficial effects of the utility model are: adopting the technological blade of the utility model can accurately simulate parameters such as mass, center of gravity, moment of inertia of the fan blade, simple structure, economical and applicable, safe and reliable, easy to operate, and can be used according to GB/T 21407- 2008 "Doubly-fed Constant Frequency Wind Turbine Generator Set" requirements, effectively realize the wind turbine pitch variable test requirements.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1. Elevator seat, 2. Reinforcing rib, 3. Main beam, 4. Round sleeve for hoisting, 5. Connecting flange plate, 6. Extension beam, 7. End counterweight, 8. Fine-tuning counterweight .

Detailed ways

As shown in FIG. 1 , a process blade of the present invention is connected to the pitch bearing and at least includes: a main beam 3 , a raised seat 1 , an extension beam 6 and a tail end counterweight 7 . The main beam 3 is in the shape of a long column, the end of the main beam 3 and the main body of the main beam 3 are connected with a reinforcing rib 2, and the reinforcing rib 2 is covered with a conical reinforcing sleeve, which effectively increases the strength of the main beam 3, reduces the deflection of the blades, and prevents the main beam 3 from out of shape. The main beam 3 is the main body of the process blade and has sufficient bending strength. One end of the booster 1 is connected to the pitch bearing through bolts, and the other end is connected to the flange bolts at the end of the main beam 3. Both sides of the booster 1 are equipped with drilled bolt holes for installation and adopt a hollow structure to effectively avoid the pitch bearing accessories. Serves as a connection transition piece for easy assembly. The extension beam 6 is in the shape of a long column, connected to the tail end of the main beam 3, and connected to the main beam 3 and the counterweight body 7 at the tail end through the connecting flange plates 5 at both ends. By loading extension beams 6 with different qualities and lengths of the same specification as the connecting flange plate 5, it is convenient to realize process blades of various quality specifications. The tail-end weight body 7 is connected to the tail end of the main beam 3 through the connecting flange plate 5. The tail-end weight body 7 preferably adopts several pieces of the same quality, which are evenly connected to the tail end of the main beam 3, so as to balance the gravity of the tail end. It can move the center of gravity of the blade backward within the limited length of the blade, and increase the moment of inertia of the blade in the same proportion as the mass multiple. At least one fine-tuning counterweight 8 is connected to the main beam 3 or the extension beam 6 or the tail end of the tail-end counterweight 7. Within the limited length of the blade, the position of the center of gravity and the moment of inertia of the blade can be fine-tuned, and the rotation increased due to the deflection of the blade can be adjusted. inertia. The flange plate 5 connects the main beam 3 and the tail counterweight part, and the ring sleeve 4 for hoisting is outsourced to the main beam 3 to increase the strength of the main beam 3 and facilitate lifting and assembly.

When assembling, first install the pad 1 on the variable pitch bearing, and then lift the main girder 3 and the pad 1 to assemble after the bolts are tightened. If the process blade of another quality specification is needed for the test, connect the flange plate 5, It can be realized only by adding the extension beam 6 of the corresponding specification, without removing the raised seat, and the assembly is convenient, safe and reliable.

Claims (9)

1. a process blade is connected on the pitch variable bearings, it is characterized in that, comprises at least:

One girder (3) is long column shape;

One bed hedgehopping seat (1), an end is connected with pitch variable bearings, and the other end is connected with the end of girder (3);

One prolongs beam (6), is long column shape, is connected girder (3) tail end; With

One tail end balance weight body (7) is arranged on girder (3) or prolongs the tail end of beam (6).

2. process blade according to claim 1 is characterized in that: the tail end of described girder (3) or prolongation beam (6) or tail end balance weight body (7) is provided with at least one fine setting balancing weight (8).

3. process blade according to claim 1 is characterized in that: described bed hedgehopping seat (1) is a hollow structure, and is connected with girder (3).

4. process blade according to claim 1 is characterized in that: described tail end balance weight body (7) is some of equal in quality, and evenly is connected the tail end of girder (3) or prolongation beam (6).

5. process blade according to claim 1 is characterized in that: described girder (3) is provided with lifting and overlaps (4) with circle.

6. process blade according to claim 1 and 2 is characterized in that: described tail end balance weight body (7) is connected by the tail end of adpting flange plate (5) with girder (3) or prolongation beam (6) with fine setting balancing weight (8).

7. process blade according to claim 1 is characterized in that: described prolongation beam (6) is connected with tail end balance weight body (7) with girder (3) by the adpting flange plate (5) at two ends.

8. process blade according to claim 1 is characterized in that: described girder (3) two ends are respectively arranged with at least two stiffening ribs (2).

9. according to claim 1 or 8 described process blades, it is characterized in that: the outer circular cone strengthening sleeve that is with of described stiffening rib (2).

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