CN219074116U

CN219074116U - Tool device for runner chamber profiling

Info

Publication number: CN219074116U
Application number: CN202222575046.9U
Authority: CN
Inventors: 胡斌杰; 王杰; 曾琪智; 潘天宇
Original assignee: Hangzhou Zhongshui Technology Co ltd
Current assignee: Hangzhou Zhongshui Technology Co ltd
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2023-05-26
Anticipated expiration: 2032-09-28

Abstract

The utility model relates to a tooling device for runner chamber profiling, which comprises two groups of profiling dies, wherein each profiling die comprises a bottom plate, side sealing plates are fixedly arranged on the peripheral side of the bottom plate, a plurality of rib plates are arranged in the side sealing plates in a staggered manner, grid grooves are formed between the rib plates, cement blocks are filled in the grid grooves, film coating plates are fixedly arranged on opposite sides of the bottom plate, the peripheral sides of the film coating plates are fixedly arranged with the side sealing plates, the surfaces, far away from the bottom plate, of the rib plates are in contact with the film coating plates and are in adaptive fit with the film coating plates, and the film coating plates on the two groups of profiling dies are in adaptive fit with each other. The tool device adopts a whole plate split pressing mode of the runner chamber when in use, avoids the disconnection and welding of the cross section of the runner chamber, reduces welding deformation, facilitates subsequent processing, saves a large amount of working hours, solves the problems of insufficient compression resistance of a general pressing die and overlarge rebound of thick plate pressing, and has great practicability.

Description

Tool device for runner chamber profiling

Technical Field

The utility model relates to the technical field of design and manufacture of parts of water turbines, in particular to a tooling device for runner chamber compression.

Background

The runner chamber is an important part of the water guide mechanism of the water turbine, and has the main functions that: 1. connecting a bottom ring and a draft tube in an axial flow water turbine and a diagonal flow water turbine to form a hydraulic channel, and forming a proper gap with the outer edge of a runner blade; 2. in order to facilitate the overhaul of the water turbine, the runner chamber is designed according to an upper valve and a lower valve, when the runner of the water turbine is overhauled, the upper half part of the runner chamber is lifted out, and the lower half part is lowered by about 500mm to form an overhaul platform; 3. an expansion joint is arranged between the runner chamber and the foundation ring to ensure the expansion space of the runner chamber with expansion and contraction, the adjusting gap is controlled within 10mm, and the structure of the expansion joint has enough strength and rigidity to resist the damage caused by the running vibration and the swinging degree of the runner chamber so as to ensure the safety, stability, tightness and leaklessness of the expansion joint under various working conditions; 4. the runner chamber is provided with 3 annular ribs which are respectively positioned on the spherical section, the transition section and the diffusion section.

The runner chamber is of an annular structure, as shown in fig. 1-2, the runner chamber 1 is generally composed of a plurality of arc sections when seen from the section, and the contour line of the section 11 of the runner chamber has various curvatures, so that the runner chamber can be formed by splicing a plurality of circular rings with different arc sections, the tangent point of the curvature arc of each circular ring is a break point according to a common manufacturing mode, the circular rings are welded after being sectionally rolled to form a complete section, and each circular ring is also generally welded by the arc sections after a plurality of rolled plates.

If the runner chamber is processed by adopting a stamping forming mode, the following two problems exist: 1. the section curvature of the runner chamber steel plate after the profiling still has some errors with the drawing because the metal thick steel plate has larger rebound resilience in the profiling process of the runner chamber die; 2. for plates with the thickness of more than 60mm, because the thick plate has poor plasticity, very large pressure is required to be used in the compression molding process, and the compression resistance of the existing mold is difficult to meet. In order to avoid the break welding at the cross section of the runner chamber, reduce welding deformation and improve the compression resistance of the mold, a new manufacturing tool and a new technological method are needed to be proposed.

Disclosure of Invention

The utility model provides a tool device for runner chamber compression, a manufacturing method and a runner chamber compression method, which are used for solving the technical problems that the welding quantity of a runner chamber is large, the welding deformation is large, the subsequent processing is influenced, the compression resistance of a compression mold is low, compression pressure cannot be born, and the like in the prior art.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows:

the utility model relates to a tooling device for runner chamber profiling, which comprises two groups of profiling dies, wherein each profiling die comprises a bottom plate, side sealing plates are fixedly arranged on the peripheral side of the bottom plate, a plurality of rib plates are arranged in the side sealing plates in a staggered manner, grid grooves are formed between the rib plates, cement blocks are filled in the grid grooves, film coating plates are fixedly arranged on opposite sides of the bottom plate, the peripheral sides of the film coating plates are fixedly arranged with the side sealing plates, the surfaces, far away from the bottom plate, of the rib plates are in contact with the film coating plates and are in adaptive fit with the film coating plates, and the film coating plates on the two groups of profiling dies are in adaptive fit with each other.

The utility model fills cement in the grid groove, and the overall strength of the die is extremely high after the cement is dried and formed, and the die can bear the pressure of a heavy hydraulic press, thereby solving the problems of overlarge compression resilience of a thick plate and low compression resistance of the die. The film coating plate is a forming plate forming runner chamber during operation, the surface shape of the film coating plate is the surface shape of the runner chamber, and the film coating plate is in contact with the surface of the rib plate.

Preferably, the side sealing plate comprises 2 arc-shaped plates and 2 straight plates, the 2 arc-shaped plates are concentric and oppositely arranged, and the 2 straight plates are oppositely arranged. The tool device is of a circular ring section structure, and is convenient for runner chamber compression.

Preferably, the rib plates comprise a plurality of transverse rib plates and a plurality of vertical rib plates, and the transverse rib plates and the vertical rib plates are vertically arranged, so that the installation and the cement filling are facilitated.

Preferably, the straight plate is perpendicular to the tangent line of the end part of the arc plate, so that the straight plate is conveniently welded into a whole after profiling, and the profiling die has a 1/4, 1/6 or 1/8 circular ring section structure. The compression mould with proper size is selected according to the size of the runner chamber, for example, when the runner chamber is smaller, the compression mould can adopt a 1/4 circular ring section structure, and 4 runner chamber blanks are pressed and then welded and combined.

Preferably, the thickness range of the rib plate is 15-25 mm, the thickness range of the side sealing plate is 15-25 mm, the thickness range of the film coating plate is 40-60 mm, and the stress point of the compression type is increased, so that the molding is better.

Compared with the prior art, the technical scheme has the following beneficial effects:

1. the tooling device for the runner chamber profiling adopts the whole plate split profiling mode of the runner chamber, avoids the disconnection and welding at the cross section of the runner chamber, reduces welding deformation, is convenient for subsequent processing and saves a large amount of working hours.

2. According to the utility model, the rib plates are arranged in the compression mold, the rib plate grooves are formed between the rib plates, cement blocks are filled in the rib plate grooves, the cement is fully filled before being dried, the compression mold is extremely high in overall strength after the cement is solidified and dried, and the compression mold can bear the pressure of a heavy hydraulic machine, so that the problems of insufficient compression resistance of a general compression mold and overlarge compression resilience of a thick plate are solved.

3. When the profiling die is manufactured, the structure of the rib plates is determined through the three-dimensional modeling software, the overflow surfaces formed by the rib plates far away from the bottom plate end are determined, the coating plate is pressed on the rib plates for forming, active modeling of the coating plate is not needed, the precision of product manufacturing is improved, the die manufacturing method is simplified, a machine tool or a machining center for high-precision machining is not needed for manufacturing the die by adopting the method, and the profiling die has great practicability.

4. The manufacturing method of the compression mold is simple in process, the manufactured mold is high in strength, the manufacturing period of the compression mold is shortened by 40% compared with that of the mold manufactured by the traditional mode, and the compression precision is improved by 50%.

Drawings

FIG. 1 is a schematic front view of a rotor chamber;

FIG. 2 is a schematic representation of the shape of a cross-section of a rotor chamber;

FIG. 3 is a perspective view of a tooling device for a runner chamber profiling in accordance with the present utility model;

FIG. 4 is a perspective view of a lower die of the present utility model;

FIG. 5 is a perspective view of the lower die of the compression die after the film wrapping plate is hidden;

FIG. 6 is a perspective view of the upper die after the film wrapping plate is hidden in the compression die;

FIG. 7 is a top view of the compression mold with the lower mold concealing the film wrapping plate;

fig. 8 is an assembly schematic diagram of the tooling device according to the present utility model after assembling a workpiece.

In the figure: 1. the section of the rotating wheel chamber (11), the rotating wheel chamber (2), the lower die (21), the coating plate (22), the straight plate (23) and the arc plate, 24, a bottom plate, 25, transverse rib plates, 26, vertical rib plates, 27, grid grooves, 3, an upper die, 31 and a coating plate.

Detailed Description

The utility model will be further understood by reference to the following examples which are given to illustrate the utility model but are not intended to limit the scope of the utility model.

Referring to fig. 3 to 8, the utility model relates to a tooling device for runner chamber profiling, which comprises two sets of profiling molds, wherein in the embodiment, the two sets of profiling molds are divided into an upper mold 3 and a lower mold 2; the lower die 2 comprises a bottom plate 24, side sealing plates are fixedly arranged on the periphery of the bottom plate 24, a plurality of rib plates are arranged in the side sealing plates in a staggered manner, each rib plate comprises a plurality of transverse rib plates 25 and a plurality of vertical rib plates 26, each transverse rib plate 25 is vertically arranged with the corresponding vertical rib plate 26, a grid groove 27 is formed between the corresponding rib plates, cement blocks (for enabling pictures to be clear and not shown in the drawing) are filled in the grid grooves 27, film coating plates 21 are fixedly arranged on opposite sides of the bottom plate 24, the periphery of each film coating plate is fixedly arranged on the side sealing plates, the surfaces, far away from the bottom plate 24, of the rib plates are in contact with the corresponding film coating plates 21 and are in adaptive fit with the corresponding film coating plates, the upper die and the lower die are identical, and the upper die is in adaptive fit with the corresponding film coating plates on the lower die.

The utility model fills cement in the grid groove 27, the overall strength of the die after the cement is dried and formed is extremely high, and the die can bear the pressure of a heavy hydraulic press, thereby solving the problems of overlarge compression resilience of a thick plate and low compression resistance of the die. The film coating plate is a forming plate forming runner chamber during operation, the surface shape of the film coating plate is the surface shape of the runner chamber, and the film coating plate is in contact with the surface of the rib plate.

The side seal plate in this embodiment includes 2

arcuate plates

23 and 2 straight plates 22, the 2 arcuate plates 23 being arranged concentrically and oppositely, the 2 straight plates 22 being arranged oppositely. The tool device is of a circular ring section structure, and is convenient for runner chamber compression. The straight plate 22 is perpendicular to the tangent line of the end part of the arc plate 23, so that the runner chamber split body is welded into a whole after being pressed. The profiling mold is 1/4, 1/6 or 1/8 circular ring section structure, the profiling mold with proper size is selected according to the size of the runner chamber, for example, the profiling mold can adopt 1/4 circular ring section structure when the runner chamber is smaller, 4 runner chamber blanks are pressed and then welded and combined. In the embodiment, the thickness of the rib plate is 20mm, the thickness of the side sealing plate is 20mm, and the thickness of the film coating plate is 50mm.

The manufacturing method for the tooling device for the runner chamber compression comprises the following steps:

(1) Obtaining the size parameters of the bottom plate, the side sealing plates and the ribs by computer software according to the size parameters of the rotating wheel chamber to be processed;

(2) The method comprises the steps of manufacturing a bottom plate, side sealing plates and rib plates, wherein a profiling surface on the rib plates is subjected to flame cutting, the rib plates comprise a plurality of transverse rib plates and a plurality of vertical rib plates, the transverse rib plates are arranged in parallel at intervals, the vertical rib plates are arranged in parallel at intervals, the distance between two adjacent parallel rib plates is about 200mm, welding the bottom plate, the side sealing plates and the rib plates to form, and then injecting cement into grid grooves between the rib plates and the rib plates or between the side sealing plates;

(3) Forming a high-strength mold substrate after the cement is solidified, sequentially placing and installing a film coating plate, a runner chamber split blank plate, a film coating plate and another group of mold substrates above the mold substrate, and performing compression molding;

(4) And welding and fixing the pressed coating plate and the die substrate to finish the manufacturing of the pressing die.

And modeling the runner chamber by utilizing software three-dimensional modeling, obtaining the shape of the surface of the rib plate, which is in contact with the coating plate, according to the profile of the overflow surface of the runner chamber and the thickness of the coating plate, after the modeling of the whole rib plate is completed, enabling one end shape of the rib plate to be totally matched with the overflow surface, splitting and drawing each rib plate, and then pressing the coating plate onto the rib plate, so that the shape of the coating plate is the shape of the overflow surface of the runner chamber. Finally, a runner chamber blank with the quality meeting the requirements is manufactured through profiling so as to facilitate subsequent processing.

In the step (2), before cement is injected into the grid groove, planer milling is carried out on a profiled surface formed by a plurality of rib plates. In consideration of the influence of larger errors in the welding process, after the rib plates are assembled and welded in a whole way, the whole die pressing surface is required to be machined through planer type milling, so that the die and the required section molded line can be completely guaranteed to be completely consistent.

The method for profiling the runner chamber by adopting the tooling device comprises the following steps of:

(2) Manufacturing and welding the bottom plate, the side sealing plates and the rib plates to form, and injecting cement into the grid grooves between the rib plates and the rib plates or the side sealing plates;

(3) Forming a high-strength mold substrate after the cement is solidified, sequentially placing and installing a film coating plate, a runner chamber split blank plate, a film coating plate and another group of mold substrates above the mold substrate, and performing compression molding; and forming the film coating plate by adopting an overflow surface formed by a plurality of rib plates.

(5) Dividing the runner chamber into a plurality of split bodies, preheating the split bodies to a temperature higher than 500 ℃, then adopting a compression mold to press the split bodies for molding, wherein an assembly schematic diagram of the compression mold is shown in fig. 8, and welding the split bodies to finish the compression mold of the runner chamber. The metal is preheated to 500 ℃ to achieve the step of higher metal plasticity, then profiling is carried out, and the error condition generated by metal rebound can be improved greatly.

The present utility model has been described in detail with reference to the embodiments, but the description is only the preferred embodiments of the present utility model and should not be construed as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model should be considered as falling within the scope of the present utility model.

Claims

1. A tool equipment for runner room die mould, its characterized in that: the two groups of profiling molds comprise a bottom plate, side sealing plates are fixedly arranged on the periphery of the bottom plate, a plurality of rib plates are arranged in the side sealing plates in a staggered mode, grid grooves are formed between the rib plates, cement blocks are filled in the grid grooves, film coating plates are fixedly arranged on opposite sides of the bottom plate, the periphery of the film coating plates are fixedly arranged on the side sealing plates, the surfaces, far away from the bottom plate, of the rib plates are in contact with the film coating plates and are in adaptive fit with the film coating plates, and the film coating plates on the two groups of profiling molds are in adaptive fit with each other.

2. The tooling device for runner chamber profiling of claim 1, wherein: the side sealing plate comprises 2 arc-shaped plates and 2 straight plates, wherein the 2 arc-shaped plates are concentric and oppositely arranged, and the 2 straight plates are oppositely arranged.

3. The tooling device for runner chamber profiling of claim 1, wherein: the rib plates comprise a plurality of transverse rib plates and a plurality of vertical rib plates, and the transverse rib plates and the vertical rib plates are vertically arranged.

4. The tooling device for runner chamber profiling of claim 2, wherein: the straight plate is perpendicular to the tangent line of the end part of the arc plate, and the profiling mold is in a 1/4, 1/6 or 1/8 circular ring section structure.

5. The tooling device for runner chamber profiling of claim 1, wherein: the thickness range of the rib plate is 15-25 mm, the thickness range of the side sealing plate is 15-25 mm, and the thickness range of the film coating plate is 40-60 mm.