CN218729570U - Composite additive manufactured model water turbine seat ring - Google Patents

Abstract

A model water turbine seat ring manufactured by composite additive manufacturing. The guide vanes of the upper part and the lower part obtained by processing have errors, and when the upper part and the lower part of the seat ring are combined, the guide vanes cannot be combined consistently and accurately, so that the precision of a final product is influenced. The utility model discloses the constitution includes: the guide vane fixing device comprises an upper ring plate (2), upper ring plate fixing guide vanes (3), lower ring plate fixing guide vanes (4) and a lower ring plate (5); the upper ring plate fixed guide vane (3) and the lower ring plate fixed guide vane (4) form an integrated fixed guide vane (6); the fixed guide vane is manufactured by electric arc additive manufacturing on the basis of the end surface of the lower ring plate; the upper ring plate is fixedly connected with the fixed guide vane through a bolt. The utility model is used for compound vibration material disk's model water turbine seat ring.

Description

Composite additive manufactured model water turbine seat ring

The technical field is as follows:

the utility model relates to a model water turbine seat ring of compound vibration material disk.

Background art:

the seat ring is one of important structural parts of a model water turbine, the lower part of the seat ring is a lower ring plate, the middle part of the seat ring is a fixed guide vane which is distributed circumferentially, and the upper part of the seat ring is an upper ring plate. The current manufacturing method comprises the following steps: the seat ring is divided into an upper part and a lower part along the center line of the guide vane, the upper part is composed of an upper ring plate and an upper ring plate fixed guide vane, the lower part is composed of a lower ring plate and a lower ring plate fixed guide vane, the two parts all use a stainless steel plate, a casting or a forging piece with complete thickness as a blank, the fixed guide vane is processed in an integral numerical control processing mode, the two parts are combined after polishing, the two parts are combined together in a manual welding mode through a positioning pin and a worker, and the whole seat ring is manufactured after cleaning, grinding and polishing are carried out on a welding area. The disadvantages of this approach are:

the assembly of the product is difficult, and the precision is difficult to guarantee. The guide vanes of the upper part and the lower part obtained by processing have errors, and when the upper part and the lower part of the seat ring are combined, the guide vanes cannot be uniformly and accurately combined, so that the precision of a final product is influenced. In particular, the assembly difference is positioned in the center of the whole fixed guide vane, and the influence on the subsequent hydraulic test is large.

The processing amount is large, and the material utilization rate is low. The two parts of the fixed guide vane parts are processed by integral blanks by adopting numerical control equipment, the height of the two parts of the fixed guide vane parts exceeds more than 50 percent of the whole annular plate, the volume of the fixed guide vane parts is less than 15 percent of the whole volume, and most materials are processed and removed.

Long processing period and high cost. The main cost of the product is the machine tool machining cost, and because the material removal is more in the whole product machining process, and in addition, the stainless steel machining performance is poor, the cutter is quickly abraded, the cutter needs to be frequently replaced, the machining period is further increased, and the manufacturing cost is improved.

The cutter consumes a lot of, increases workman's amount of labour. Because the cutter loss is fast, the cutter consumes a lot of, when bringing the improvement of cost, still can influence processingquality, increases workman's the amount of labour.

The existence of uneven materials and internal defects causes the increase of the manufacturing period, the manufacturing cost and the consumption of cutters, and a great deal of defects also exist in the final product, thereby bringing great difficulty to the subsequent treatment.

The utility model has the following contents:

the utility model aims at solving the problems existing in the prior art and providing a model water turbine seat ring manufactured by composite additive.

The above purpose is realized by the following technical scheme:

a model hydraulic turbine seat ring manufactured by composite additive is characterized in that: the composition comprises: the guide vane fixing device comprises an upper ring plate, upper ring plate fixed guide vanes, lower ring plate fixed guide vanes and a lower ring plate;

the upper ring plate fixed guide vane and the lower ring plate fixed guide vane form an integrated fixed guide vane;

the fixed guide vane is manufactured by electric arc additive manufacturing on the basis of the end surface of the lower ring plate;

the upper ring plate is fixedly connected with the fixed guide vane through a bolt.

The upper ring plate and the lower ring plate of the model water turbine seat ring manufactured by the composite additive are arranged in parallel.

Has the beneficial effects that:

1. the utility model discloses go up the stator of crown plate stator and lower crown plate stator has constituted integrative stator, makes the reduction of steel plate thickness requirement by a wide margin, and the handling capacity of crown plate is very little, has avoided the processing problem that the material problem brought, reduces the processing degree of difficulty, has improved product quality.

2. The utility model discloses the part of last assembly is the last crown plate, has avoided a series of problems that the assembly of upper and lower crown plate stator brought, has improved the assembly precision, has reduced the manufacturing difficulty, has reduced the work load of artifical clearance, polishing and polishing by a wide margin.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a perspective view of the present invention;

in the figure: 1. a turbine housing ring; 2. an upper ring plate; 3. the guide vanes are fixed by the upper ring plate; 4. the guide vanes are fixed by the lower ring plate; 5. a lower ring plate; 6. and (5) fixing the guide vanes.

The specific implementation mode is as follows:

referring to fig. 1-2, a composite additive manufactured model turbine shroud, turbine shroud 1 comprises: the device comprises an upper ring plate 2, upper ring plate fixed guide vanes 3, lower ring plate fixed guide vanes 4 and a lower ring plate 5;

the upper ring plate fixed guide vane 3 and the lower ring plate fixed guide vane 4 form an integrated fixed guide vane 6;

the upper ring plate and the lower ring plate are arranged in parallel, and the blanks of the upper ring plate and the lower ring plate are cast, forged or steel plates and are manufactured by adopting a machining method;

the fixed guide vane is manufactured by electric arc additive manufacturing on the basis of the end face of the lower ring plate;

additive manufacturing technology (also known as 3D printing technology) is a novel manufacturing technology based on a material accumulation method, and can be used for manufacturing a physical model by a forming device in a material accumulation manner according to three-dimensional model data of a part or an object. The design idea can be automatically, directly, quickly and accurately converted into a prototype with certain functions or a directly manufactured part, so that an efficient and low-cost implementation means is provided for prototype manufacture of the part, verification of a new design idea and the like.

The electric arc additive manufacturing technology takes electric arc as energy-carrying beam, adopts a mode of build-up welding layer by layer to manufacture a metal solid component, the formed part is composed of a full welding seam, and the main application target of the electric arc additive manufacturing technology is low-cost, efficient and quick near-net forming of a large-size complex component;

the upper ring plate is fixedly connected with the fixed guide vane through a bolt.

The model turbine seat ring is an important part for turbine runner design development and hydraulic test, and the manufacturing quality and precision of the model turbine seat ring have important influence on design verification and test data correctness. The manufacturing method of the model water turbine seat ring manufactured by the composite additive comprises the steps of manufacturing an upper ring plate and a lower ring plate by adopting forgings, manufacturing a whole fixed guide vane blank on the lower ring plate by adopting a robot-controlled arc additive manufacturing method, then machining and polishing the guide vane and the lower ring plate, and installing the machined upper ring plate on the fixed guide vane to complete the installation of the whole seat ring. The model water turbine base ring manufactured by the composite additive has the following advantages:

the structure of the seat ring is greatly simplified, and parts which are provided with upper ring plates and used for fixing guide vanes and need to be processed by the numerical control milling machine are changed into the upper ring plates which only need to be processed by a lathe.

The fixed guide vane is a near-net-shaped blank, the machining allowance is small, and the raw material cost, the production period and the manufacturing cost are reduced. Wherein, the manufacturing cost is reduced by more than 35 percent, the period is reduced by more than 25 percent, and the number of rough machining cutters is saved by 70 percent.

The last assembly part is the upper ring plate, a series of problems caused by the assembly of the upper ring plate and the lower ring plate and the fixed guide vanes are avoided, the assembly precision is improved, the manufacturing difficulty is reduced, and the workload of manual cleaning, grinding and polishing is greatly reduced.

The fixed guide vane is one time of the height of the fixed guide vane of the lower ring plate, the thickness of the steel plate is greatly reduced, the processing amount of the ring plate is very small, the processing problem caused by the material problem is avoided, the processing difficulty is reduced, and the product quality is improved.

Claims (2)

1. A model hydraulic turbine seat ring manufactured by composite additive is characterized in that: the composition comprises: the guide vane fixing device comprises an upper ring plate (2), upper ring plate fixing guide vanes (3), lower ring plate fixing guide vanes (4) and a lower ring plate (5);

the upper ring plate fixed guide vane (3) and the lower ring plate fixed guide vane (4) form an integrated fixed guide vane (6);

the fixed guide vane is manufactured by electric arc additive manufacturing on the basis of the end surface of the lower ring plate;

the upper ring plate is fixedly connected with the fixed guide vane through a bolt.

2. A composite additive manufactured model turbine seat ring as defined in claim 1, wherein: the upper ring plate and the lower ring plate are arranged in parallel.

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