CN204686345U - A kind of compressor, steam turbine leaf grating assembling jig - Google Patents

Abstract

The utility model relates to a cascade assembling fixture for a compressor and a steam turbine, which relates to a cascade assembling fixture. The utility model aims to solve the problem that the existing blade cascade tooling cannot realize the final loading of the shroud, and thus cannot be competent for the assembly work of the blade cascade. The upper end surface of the bottom plate of the utility model is processed with a first annular cascade assembly groove and a second annular cascade assembly groove, and an installation groove is processed on the upper end surface of the bottom plate located inside the second annular cascade assembly groove , the mounting groove is adjacent to the mounting groove of the second annular cascade, the positioning ring is detachably mounted on the mounting groove through a plurality of hex nuts, and the bottom end of the mounting groove of the second circular cascade is lower than the upper end surface of the positioning ring, The cascade is installed in the first annular cascade assembly groove and the second annular cascade assembly groove, and one side of the cascade is against the outer wall of the positioning ring, and the pressure ring is detachable in an annular array through a plurality of pressure plates Installed on the cascade. The utility model is used for the assembly of blade cascades of air compressors and steam turbines.

Description

A blade cascade assembly fixture for compressors and steam turbines

technical field

The utility model relates to a blade cascade assembly fixture, in particular to a blade cascade assembly fixture for a compressor and a steam turbine, which is used for welding the blade cascade.

Background technique

When designing the cascade tooling for guide vane and shroud assembly in steam turbine and compressor products, the existing major steam turbine manufacturers generally adopt the conventional design scheme of directly processing the shroud positioning groove on the tooling, which is suitable for most Assembly work for most simple structural cascades. However, for special structures (such as curved and twisted guide vanes, the guide vanes cannot pass through the inner and outer belt-shaped holes from one side of the shroud at the same time to form a cascade or guide vanes are first fixed with one side of the shroud and then passed through the other. One side of the shroud) cascade, because the structure of the tooling can not realize the final installation of the shroud, which can not be competent for the assembly work of the cascade.

Utility model content

The purpose of the utility model is to solve the problem that the existing cascade tooling cannot realize the final installation of the shroud, so that it cannot be competent for the assembly work of the shroud-type diaphragm structure cascade of the compressor. Furthermore, a blade cascade assembling fixture for a compressor and a steam turbine is provided.

The technical scheme of the utility model is: a blade cascade assembly fixture for a compressor and a steam turbine includes a base plate, a positioning ring, a pressure ring, a plurality of pressure plates and a plurality of hexagonal nuts, and a first annular blade cascade assembly is processed on the upper end surface of the base plate. Groove and the second annular cascade assembly groove, on the upper end surface of the bottom plate located inside the second annular cascade assembly groove, a mounting groove is processed, the installation groove is adjacent to the second annular cascade assembly groove, the positioning ring A plurality of hex nuts are detachably installed on the installation groove, and the bottom end of the second annular cascade fitting groove is lower than the upper end surface of the positioning ring, and the cascade is installed on the first annular cascade fitting groove and the second annular vane The cascade is fitted in the groove, and one side of the cascade is against the outer side wall of the positioning ring, and the pressure ring is detachably installed on the cascade in a circular array through a plurality of pressure plates.

Compared with the prior art, the utility model has the following effects:

For special structures (such as curved and twisted guide vanes, the utility model cannot realize that the guide vanes pass through the inner and outer belt-shaped holes successively from one side of the shroud at the same time to form a cascade or the guide vanes and one side of the shroud are first fixed and then passed through. The shroud on the other side) the cascade adopts the plan of installing the shroud on one side first, then into the guide vane, and finally into the shroud on the other side, and then into the positioning ring of the tooling to carry out the combined work of the cascade so as to meet the Special structural cascade assembly work. Effectively avoiding the problem of the final installation of the shroud by the existing tooling, the cascade tooling of the utility model is also suitable for special structures such as curved and twisted blades (such as curved and twisted guide blades, the guide blades cannot be realized from the side of the shroud at the same time, Pass through the inner and outer belt holes successively to form a cascade or guide vane and one side of the shroud to be fixed first and then pass through the other side of the shroud) cascade assembly work. The utility model also realizes the feasibility of changing the assembly sequence of the cascade by adding the detachable function of the positioning half-ring of the cascade fixture, realizes the rapid assembly of the cascade, shortens the assembly time of the cascade by half, and ensures the assembly quality of the cascade .

Description of drawings

Fig. 1 is a front view of the utility model; Fig. 2 is a top view of Fig. 1; Fig. 3 is a front view of a cascade; Fig. 4 is a sectional view of Fig. 3 at A-A; Fig. 5 is a sectional view of Fig. 4 after B-B rotation ; Figure 6 is a schematic view of the structure of the guide vane.

Detailed ways

Specific embodiment 1: This embodiment is described in conjunction with Fig. 1 and Fig. 2, and this embodiment comprises bottom plate 1, positioning ring 2, pressure ring 3, a plurality of pressure plates 4 and a plurality of hex nuts 5, and the upper end surface of bottom plate 1 is processed with The first annular cascade fitting groove 1-1 and the second annular cascade fitting groove 1-2 are processed with a mounting groove 1 on the upper end surface of the bottom plate 1 located inside the second annular cascade fitting groove 1-2 -3, the installation groove 1-3 is adjacent to the second annular cascade assembly groove 1-2, the positioning ring 2 is detachably installed on the installation groove 1-3 through a plurality of hex nuts 5, and the second annular cascade is assembled The bottom end of the groove 1-2 is lower than the upper end surface of the positioning ring 2, the cascade 6 is installed in the first annular cascade fitting groove 1-1 and the second annular cascade fitting groove 1-2, and the cascade One side of 6 is against the outer side wall of the positioning ring 2, and the pressure ring 3 is detachably mounted on the cascade 6 in a circular array through a plurality of pressure plates 4.

First of all, the conventional cascade positioning groove structure assembly tooling is suitable for occasions: when the cascade is assembled, the inner and outer belts must be put into the corresponding positioning grooves of the cascade tooling, and finally the guide vanes are installed from the side of the shroud belt, in turn. The assembly sequence for assembling the guide vanes through the inner and outer guide vane-shaped holes. This is no problem for guide vanes with normal blade shapes such as straight blades. However, it is more difficult to realize the curved and twisted blades and some special structural cascades on the compressor, which requires us to change the assembly sequence of the cascades and allow the cascade assembly tool to realize the final installation of the shroud on one side Tool positioning groove function, that is, to realize the following assembly process: First, one side of the shroud can be installed into the corresponding tool positioning groove, and then the guide vane can be installed into the guide vane hole of the side of the shroud, and finally Align the shroud-shaped hole on the other side with the guide vane at the corresponding position one by one, and slowly push the shroud from the other side, so that the shroud-shaped hole and the guide vane can be assembled in order to assemble the cascade Work. Therefore, the cascade assembly clip of the present invention has a detachable function, and can meet the above-mentioned requirements for changing the cascade assembly sequence.

Specific Embodiment 2: This embodiment is described in conjunction with Fig. 1 and Fig. 2. The lower end surface of the pressure ring 3 of this embodiment is provided with a third annular cascade assembly groove 1-3 and a fourth annular cascade assembly groove 1- 4. The third annular cascade fitting groove 1-3 is located above the first annular cascade fitting groove 1-1, and the fourth annular cascade fitting groove 1-4 is located at the second annular cascade fitting groove 1- 2 above. So arranged, it is convenient to be pressed into a U-shaped cylinder. Other compositions and connections are the same as in the first embodiment.

Specific embodiment three: This embodiment is described in conjunction with Fig. 1 and Fig. 2. A blade cascade assembly fixture for a compressor and a steam turbine of this embodiment also includes a plurality of bolts 7 and a plurality of nuts 8, and the connection between the bottom plate 1 and the compression ring 3 The space is connected by a plurality of bolts 7 and fixed by a plurality of nuts 8 . In this way, the connecting plate 2-1-2 can provide enough space for the U-shaped cylindrical piece, and the half cylinder 2-1-1 is convenient for pressing the U-shaped cylindrical piece. Other compositions and connections are the same as those in the second embodiment.

Embodiment 4: This embodiment is described with reference to FIG. 1 and FIG. 2 . A blade cascade assembly fixture for a compressor and a steam turbine in this embodiment further includes a plurality of screws 9 , which are screwed on the pressure ring 3 . So set, it is convenient to cooperate with the inner side wall of rolling upper mold 2-9, guarantee the completeness of cylindrical parts pressing simultaneously. Other compositions and connections are the same as those in the third embodiment.

Embodiment 5: This embodiment will be described with reference to FIG. 1 and FIG. 2 . The plurality of pressing plates 4 in this embodiment are all rectangular pressing plates. So set, it is convenient to cooperate with the semicircular reel lower mold 1-5. Other compositions and connections are the same as those in Embodiment 1, 2, 3 or 4.

Embodiment 6: This embodiment will be described with reference to FIG. 1 and FIG. 2 . The number of multiple pressing plates 4 in this embodiment is 6-12. Such arrangement facilitates the pressing of the U-shaped cylindrical part into a cylindrical shape. Other compositions and connections are the same as those in Embodiment 1, 2, 3, 4 or 5.

In conjunction with Fig. 3 to Fig. 6 explanation, the use process of the present utility model is:

1. Preparations before cascade assembly:

First, check that the positioning dimensions of the tooling used for cascade assembly meet the drawings and technical requirements.

2. Cleaning before cascade welding:

After the size of the tooling meets the requirements, carefully clean the surfaces of the tooling to remove rust, scale, paint, oil, emulsion and other dirt.

3. Assembly of cascade:

First, put the outer ring 10 into the first annular cascade assembly groove 1-1 of the cascade assembly and welding tool;

Second, then the guide vanes 11 are sequentially loaded into the positioning installation space formed between the corresponding bottom plate 1 and the pressure ring 3 of the outer ring blades;

Third, match the holes of the inner ring 12 with the guide vanes 11 one by one, and gently push them into the second annular cascade assembly groove 1-2 of the cascade assembly and welding tool from the inside to the outside;

Fourth, install the pressure ring 3;

Fifth, install bolts, pressure plates and nuts in sequence.

4. Preheating before welding:

5. Welding:

The welding seam between the guide vane 11 and the inner ring 12 is welded and filled, and the size of the weld seam meets the technical requirements of the drawings.

6. Disassemble the tooling.

Claims (6)

1. A blade cascade assembly fixture for air compressor and steam turbine is characterized in that: it comprises base plate (1), positioning ring (2), pressure ring (3), multiple pressure plates (4) and multiple hex nuts (5 ), the upper end surface of the bottom plate (1) is processed with the first annular cascade fitting groove (1-1) and the second annular cascade fitting groove (1-2), and the (1-2) An installation groove (1-3) is processed on the upper end surface of the bottom plate (1) inside, and the installation groove (1-3) is adjacent to the second annular cascade assembly groove (1-2), and the positioning The ring (2) is detachably installed on the installation groove (1-3) through a plurality of hexagonal nuts (5), and the bottom end of the second annular cascade assembly groove (1-2) is lower than that of the positioning ring (2). On the upper end face, the cascade (6) is installed in the first annular cascade fitting groove (1-1) and the second annular cascade fitting groove (1-2), and one side of the cascade (6) is aligned with the The outer side walls of the ring (2) are against each other, and the pressure ring (3) is detachably mounted on the cascade (6) in a circular array through a plurality of pressure plates (4). 2. A blade cascade assembly fixture for compressors and steam turbines according to claim 1, characterized in that: the third annular blade cascade assembly groove (1-3) and the first Four annular cascade fitting grooves (1-4), the third annular cascade fitting groove (1-3) is located above the first annular cascade fitting groove (1-1), the fourth annular cascade fitting groove The slot (1-4) is located above the fitting groove (1-2) of the second annular blade cascade. 3. A blade cascade assembly fixture for a compressor and a steam turbine according to claim 2, characterized in that: a blade cascade assembly fixture for a compressor and a steam turbine also includes a plurality of bolts (7) and a plurality of nuts (8 ), the bottom plate (1) and the pressure ring (3) are connected by a plurality of bolts (7) and fixed by a plurality of nuts (8). 4. A kind of blade cascade assembly fixture for compressor and steam turbine according to claim 3, characterized in that: a kind of compressor, steam turbine blade cascade assembly fixture also includes a plurality of screws (9), and a plurality of screws (9) ) is screwed onto the pressure ring (3). 5 . The blade cascade assembly fixture for compressors and steam turbines according to claim 4 , wherein the plurality of pressing plates ( 4 ) are all rectangular pressing plates. 6 . 6. A blade cascade assembly jig for compressors and steam turbines according to claim 1 or 5, characterized in that the number of the plurality of pressure plates (4) is 6-12.