Inclined bearing surface blade root groove measuring tool

Abstract

The utility model discloses an inclined bearing surface blade root groove measuring tool, which comprises a base which at least partially extends into a blade root groove and is provided with a mounting hole, a mounting groove and a reference part attached to a straight groove surface of the blade root groove; the measuring meter is in sliding fit in the mounting hole, and a measuring head of the measuring meter abuts against the shoulder part of the blade root groove; the positioning ball is arranged in the mounting groove and abuts against the surface of the inclined transverse groove of the blade root groove, and the consistency and the height difference of the inclined transverse groove of the blade root groove can be efficiently and accurately measured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a steam turbine measurement technical field, concretely relates to a kind of oblique bearing surface blade root groove measuring tool. BACKGROUND

[0002] Steam turbine rotor is the core component of steam turbine generator set. Steam turbine rotor works at high speed rotation, not only to withstand the centrifugal force generated by moving blade, but also to withstand dynamic stress. T-shaped blade root groove is the most common form of blade root groove, with the advantages of simple structure and easy processing. There is an oblique bearing surface T-shaped blade root groove in the prior art, which is different from the conventional T-shaped groove in that the bearing surface is improved into an inclined surface. This structure can expand the area of the bearing surface, and at the same time, the strength of the blade root of the bearing surface is improved. The consistent radial force is dispersed to the axial direction, and due to the double inclined surface, the structure also has the characteristics of self-centering. It is difficult to process and measure the oblique bearing surface T-shaped blade root groove. At present, all T-shaped blade root groove measuring tools, including elbow micrometer or blade root groove clamping plate, can be used to measure T-shaped blade root groove transverse groove, but for the inclined transverse groove, accurate measurement cannot be achieved because the contact point between the micrometer and the clamping plate and the inclined surface is unstable, and the same point on the left and right sides cannot be measured consistently, and the measurement result cannot reflect the true height data of the inclined transverse groove. Therefore, a new type of rotor T-shaped blade root groove inclined transverse groove special measuring tool and a measuring method that can ensure accurate measurement data are needed to realize the measurement of T-shaped blade root groove inclined transverse groove. SUMMARY

[0003] To solve the above technical problems, the utility model provides a kind of oblique bearing surface blade root groove measuring tool, can efficiently and accurately measure the consistency and height difference of blade root groove inclined transverse groove.

[0004] The utility model adopts the following technical scheme:

[0005] A kind of oblique bearing surface blade root groove measuring tool, comprising: base, at least part is inserted into blade root groove, with installation hole, installation slot and the reference part of blade root groove's straight groove face;Measuring table, slidable cooperation in installation hole, and its measuring head is resisted to the shoulder of blade root groove;Positioning bead is set in installation slot and is resisted to the inclined transverse groove surface of blade root groove.

[0006] As preferred, the base includes an upper connecting block and a lower connecting block, and the upper connecting block and the lower connecting block are connected by the reference part.

[0007] As preferred, the upper connecting block and the lower connecting block are perpendicular to the reference part.

[0008] As preferred, the upper connecting block is provided with an installation hole, and the lower connecting block is provided with an installation slot at one end.

[0009] Preferably, an adjustment groove is provided on one side of the mounting hole, and a locking bolt is provided on the adjustment groove.

[0010] Preferably, the positioning bead is fixedly disposed in the mounting groove.

[0011] Preferably, the measuring head has a flat-bottomed structure.

[0012] Compared with the prior art, the present invention has the following advantages: The present invention provides a measuring tool for the blade root groove of the inclined bearing surface. It is a measuring tool that uses the contact between the spherical surface and the inclined surface, and uses a dial indicator for comparative measurement. It can efficiently and accurately measure the consistency and height difference of the inclined transverse groove of the blade root groove. The straight groove surfaces on both sides of the blade root groove are used as the positioning reference of the measuring tool, and the two shoulders of the blade root groove are used as the measurement reference, which ensures the accuracy and validity of the measurement data. Attached Figure Description

[0013] Figure 1 This is a schematic diagram showing the usage status of the leaf root groove measuring tool.

[0014] Figure 2 This is a schematic diagram of the blade root groove measuring tool.

[0015] Figure 3 This is a cross-sectional view of the leaf root groove.

[0016] Figure 4 for Figure 3 Enlarged view of part A.

[0017] Figure 5 A cross-sectional view of the blade root groove measuring tool in use.

[0018] Figure 6 for Figure 5 Enlarged view of part B.

[0019] Figure 7 This is a schematic diagram of the base structure.

[0020] In the figure, there are: base 1, mounting hole 1-1, mounting groove 1-2, reference part 1-3, upper connecting block 1-4, lower connecting block 1-5, adjustment groove 1-6, measuring gauge 2, measuring head 2-1, positioning bead 3, blade root groove 5, straight groove surface 5-1, shoulder 5-2, and oblique transverse groove 5-3. Detailed Implementation

[0021] To facilitate understanding of the technical solution of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] like Figures 1-2 As shown, a measuring tool for blade root grooves on inclined bearing surfaces is applicable to the measurement of blade root grooves on inclined bearing surfaces.

[0024] As Figures 3-4 shown, the blade root groove 5 has a straight groove surface 5-1, a shoulder 5-2 and an inclined transverse groove 5-3;

[0025] As Figures 5-6 shown, the measuring tool comprises:

[0026] The base 1, at least partially extending into the blade root groove 5, has a mounting hole 1-1, a mounting groove 1-2 and a reference part 1-3 abutting the straight groove surface 5-1 of the blade root groove;

[0027] The measuring table 2, slidably fitted into the mounting hole 1-1, has a measuring head 2-1 abutting the shoulder 5-2 of the blade root groove;

[0028] The positioning bead 3 is arranged in the mounting groove 1-2 and abuts the surface of the inclined transverse groove 5-3 of the blade root groove.

[0029] In addition, as Figure 7 shown, the base 1 comprises an upper connecting block 1-4 and a lower connecting block 1-5, both of which are perpendicular to the reference part 1-3, and the upper connecting block 1-4 and the lower connecting block 1-5 are connected by the reference part 1-3 to form a transversely arranged U-shaped structure.

[0030] The upper connecting block 1-4 is provided with the mounting hole 1-1, the lower connecting block 1-5 is provided with the mounting groove 1-2 at one end, the mounting hole 1-1 is provided with an adjusting groove 1-6 at one side, the adjusting groove 1-6 is provided with a locking bolt 4, and the adjusting locking bolt 4 can fix the measuring table 2.

[0031] The measuring table 2 is preferably a dial gauge, and the measuring head 2-1 at the lower end thereof is a flat bottom structure, which is convenient for abutting the shoulder 5-2.

[0032] The positioning bead 3 is fixedly arranged in the mounting groove 1-2 and can be fixedly connected in the mounting groove 1-2 by welding.

[0033] In use, the following steps are included:

[0034] Step one: the outer diameter dimensions of the two shoulders 5-2 of the rotor blade root groove 5 are used as the detection reference of the inclined transverse groove 5-3, and an outside diameter micrometer is used for measurement during processing, and the size tolerance of both sides should be within 0.01 mm, so as to be used as the measurement reference of the inclined transverse groove 5-3 of the blade root groove.

[0035] Step two: after the oblique transverse groove 5-3 of the blade root groove is machined, the dial gauge is initially locked by the locking bolt 4, is put into the blade root groove 5 for trial assembly measurement, the reference part 1-3 of the base 1 side is guaranteed to be in full contact with the straight groove surface 5-1 of the opposite side, the positioning bead 3 is in full contact with the surface of the oblique transverse groove 5-3, the dial gauge is adjusted to the appropriate position, the measuring head below the dial gauge is in contact with the shoulder part 5-2 of the blade root groove.

[0036] Step three: the measuring tool is taken out, the dial gauge is completely locked by the locking bolt 4, and then measurement is carried out again, the measuring tool is guaranteed to be in full contact with the straight groove surface 5-1, the positioning bead 3 is in full contact with the surface of the oblique transverse groove 5-3, and the measurement data on the dial gauge is read out.

[0037] Step four: the measuring tool is turned over, step three is repeated, the other side oblique transverse groove is measured, the positioning reference becomes the straight groove surface 5-1 of the side measured in the previous step, the measuring tool is guaranteed to be in full contact with the straight groove surface 5-1, the positioning bead 3 is in full contact with the surface of the oblique transverse groove 5-3, and the measurement data on the dial gauge is read out.

[0038] Step five: the two measurement data are compared, if the data difference is within the tolerance 0.02mm, it is considered that the machining is completed, the high-low data detection of the two sides oblique transverse grooves is passed, if the data difference exceeds the tolerance 0.02mm, the side with larger data needs to be supplemented, after the machining is completed, the measurement is carried out again, and the supplementing amount is the data difference value of the two times of measurement.

[0039] The above is only the preferred embodiment of the utility model, the protection scope of the utility model is limited by the scope of the claims, and some improvements and decorations made by the person skilled in the art without departing from the spirit and range of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A wedge force face blade root groove measuring tool characterized by, The utility model relates to a blade root slot measuring device, including: The base (1) is at least partially inserted into the blade root slot (5) and has a mounting hole (1-1), a mounting groove (1-2) and a reference part (1-3) attached to the straight groove surface (5-1) of the blade root slot; The measuring table (2) is slidably fitted into the mounting hole (1-1), and the measuring head (2-1) thereof abuts against the shoulder (5-2) of the blade root slot; The positioning bead (3) is arranged in the mounting groove (1-2) and abuts against the surface of the inclined transverse groove (5-3) of the blade root slot.

2. The wedge face root pocket measuring tool of claim 1, wherein, The base (1) comprises an upper connecting block (1-4) and a lower connecting block (1-5), and the upper connecting block (1-4) and the lower connecting block (1-5) are connected by the reference part (1-3).

3. The wedge face root pocket measuring tool of claim 2, wherein, The upper connecting block (1-4) and the lower connecting block (1-5) are both perpendicular to the reference part (1-3).

4. The wedge face root pocket measuring tool of claim 2, wherein, The upper connecting block (1-4) is provided with the mounting hole (1-1), and the lower connecting block (1-5) is provided with the mounting groove (1-2) at one end.

5. The wedge face root pocket measuring tool of claim 1, wherein, One side of the mounting hole (1-1) is provided with an adjusting groove (1-6), and the adjusting groove (1-6) is provided with a locking bolt (4).

6. The wedge face root pocket measuring tool of claim 1, wherein, The positioning bead (3) is fixedly arranged in the mounting groove (1-2).

7. The wedge face root pocket measuring tool of claim 1, wherein, The measuring head (2-1) has a flat bottom structure.

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