CN207031599U - Screw type crystal selector - Google Patents

Abstract

The utility model discloses a kind of screw type crystal selector, including being sequentially connected the graining section communicated, selecting brilliant section, it is described to select brilliant section in the shape of a spiral, the raising angle for selecting brilliant section is 33 degree, it is described that to select brilliant section be highly 14.4mm, described to select the brilliant a diameter of 3.2mm of section spiral section, described to select brilliant section pitch be 4.36mm；Reasonable accurate sized data is provided in the utility model to this screw type crystal selector, can preferably realize the preparation of high temperature alloy monocrystalline, and the course of work is steady, operating efficiency is high.

Description

Screw type crystal selector

Technical field

It the utility model is related to the technology of preparing of high temperature alloy monocrystalline, more particularly to a kind of screw type crystal selector.

Background technology

Aero-engine is the mostly important part of aerospace industries, the imperial crown being referred to as in industry, in engine Blade is then the heart in engine, and its manufacturing cost accounts for the 25% to 30% of complete machine, and the key technology of vane manufacturing is Monocrystalline solidifies growth course, and the quality of crystal selector determines the material orientation characteristic of single crystal blade, is state's internal lobe all the time One of bottleneck of piece manufacturing technology.It is the most important link for determining Blade Properties, is described as " the brill on imperial crown of airborne vehicle Stone ".

The design of crystal selector relies primarily on experience at present, and for the height of crystal selector, diameter, and lead angle lack The theories integration of weary rational science and digital simulation support；Select the brilliant stage to be formed with defect and do not have standard foundation, screw selecting The choosing crystalline substance mechanism of brilliant device, crystal separation method prepare during monocrystalline in crystal orientation control and directional solidification process Solidification Parameters to list The influence of brilliant high temperature alloy solidified structure, stray crystal and shrinkage defect all needs to be studied.

Utility model content

The purpose of this utility model is to provide a kind of screw type crystal selector, can preferably realize the system of high temperature alloy monocrystalline It is standby, and provide rational sized data.

Above-mentioned technical purpose of the present utility model technical scheme is that:A kind of screw type choosing is brilliant Device, including be sequentially connected the graining section communicated, select brilliant section, it is described to select brilliant section in the shape of a spiral, it is described select brilliant section raising angle be 33 degree, described to select brilliant section be highly 14.4mm, described to select the brilliant a diameter of 3.2mm of section spiral section, described to select the brilliant section pitch to be 4.36mm。

By using above-mentioned technical proposal, it is highly 14.4mm, spiral section is a diameter of for 33 degree to use angle of standing up 3.2mm, pitch are 4.36mm choosing crystalline substance section, employ the size of rationalization, and can preferably realize the preparation of crystal, and In crystal preparation process, operating efficiency is higher, selects brilliant stable working.

The utility model is further arranged to：The graining section outer wall is highly 30mm, inside wall height 28.5mm.

By using above-mentioned technical proposal, now while not waste of materials, there can be foot in graining section for crystal Enough space time coagulation formings.

The utility model is further arranged to：The graining section is in frustum, and the graining section inner surface taper is 2 Degree, graining end maximum outside diameter is 15mm, maximum inner diameter 12mm.

, can be further for crystal in graining section now while not waste of materials by using above-mentioned technical proposal With enough space time coagulation formings.

In summary, the utility model has the advantages that：

1st, the preparation work of crystal can be smoothly realized, and is put down with the design size rationalized, crystal growing process Surely, operating efficiency is high；

2nd, the size requirement of graining section has also carried out uniformity and rationalization, does not waste and prepares material, and is being risen for crystal In brilliant section there is enough space times to be solidified；

3rd, the choosing crystalline substance section of screw type has multiple tracks bending angle, can improve and select brilliant efficiency；

4th, the bending angle for selecting brilliant section of screw type is in arc-shaped, bending will not be caused to be mutated, so as to reduce stray crystal Generation.

Brief description of the drawings

Fig. 1 is the front view of this screw type crystal selector；

Fig. 2 is the sectional view of A-A in Fig. 1；

Fig. 3 is the top view of this screw type crystal selector；

Fig. 4 is the upward view of this screw type crystal selector；

Fig. 5 is that the graining section of this screw type crystal selector is in cube-shaped schematic diagram.

In figure：1st, graining section；2nd, brilliant section is selected；3rd, changeover portion.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

Embodiment：A kind of screw type crystal selector, as Figure 1-4, including it is sequentially connected the graining section 1 communicated and selects brilliant section 2, single crystal blade can be directly generated at the upper end outlet of brilliant section 2 by selecting, in order to facilitate the processing and manufacturing in single crystal blade later stage, this Changeover portion 3 is also provided with the upper end outlet of Shi Xuan crystalline substances section 2, the changeover portion 3 is in positive six prismsby shape, a height of 6mm, such as Fig. 3 institutes Show；This screw type crystal selector whole height is 60.5mm.

As illustrated in fig. 1 and 2, the graining section 1 of this screw type crystal selector is in frustum, and its inner surface taper is 2 degree, described Graining end maximum outside diameter is 15mm, maximum inner diameter 12mm, and its outer wall is highly 30mm, inside wall height 28.5mm；So Size design in rational scope and preferably used material, the waste of material will not be caused, and can be for crystal Solidified with enough room and times.

As illustrated in fig. 1 and 2, the choosing crystalline substance section 2 of this screw type crystal selector is in rising helical form, and has 1.5 spiral pitch of the laps, Raising angle is 33 degree, is highly 14.4mm, spiral section a diameter of 3.2mm, pitch 4.36mm, this selects the brilliant size of section 2 In rational size range, and the 14.4mm brilliant height of choosing can have time enough to form the same of monocrystalline for crystal When, choosing is brilliant highly relatively low, can now improve and select brilliant efficiency；And the design of raising angle, cross section diameter and pitch is also all It is smaller, while fully ensuring that this selects the smooth making of the brilliant spiral of section 2, it can also be reduced in the integral manufacturing of this crystal selector The height of the brilliant section 2 of choosing.

Embodiment：Analyze from the microprocess of crystal growth, because the atomic density of each crystal face of crystal is different, match somebody with somebody Digit is different, and chemical bond key is different, causes the electron configuration of each crystal face difference, thus the interface of each crystal face can not When together, so as to cause Liquid-solid conversion, the frequency at liquid phase atomic collision interface is different, thus in process of setting crystal in different crystal faces The speed of growth it is variant, i.e., crystal can show anisotropy in process of setting, be embodied in crystal in each crystal The speed of growth for learning direction is different.It is referred to as the preferred orientation of the crystal for growing faster direction on crystalline orientation（Preferentially The direction of growth）.

The putamina of this screw type crystal selector and single crystal blade can be produced using 3D printing technique, and is fixed in After on working equipment, it is fixed using husky mould technology, high-temperature liquid metal is poured into Sha Mozhong, this screw type crystal selector and list The putamina of brilliant blade is melted, and the appearance of the putamina shape of this screw type crystal selector and single crystal blade is now preserved inside husky mould Chamber, molten metal solidify in the cavity volume of graining section 1, and crystal grain is along selecting the brilliant shape of section 2 to proceed by crystallization, and more crystal grain are in crystallization During can with positioned at choosing it is brilliant during away from the crystal grain on the inside of spiral line type passage due to by crystal selector spiral line type passage Stronger obstruction, gradually lose growing space and eliminated by the crystal grain on the inside of helix-type channel, only a crystal grain length It is big to form single crystal blade, and due to the crystal selector of screw type, its turning is in arc-shaped, so crystal grain is during growth The situation of stray crystal will not be formed due to the mutation at turning, so as to smoothly realize the preparation of single crystal super alloy casting.

In the present embodiment, can be more as shown in figure 1, because spiral-shaped choosing crystalline substance section 2 has multiple tracks bending angle Crystal grain is during selecting and being grown in brilliant section 2, quickly with selecting the brilliant vias inner walls of section 2 to hinder, so as to quickly be washed in a pan Eliminate, so as to facilitate the fast-growth of single crystal blade, improve operating efficiency.

As shown in figure 5, the graining section of this screw type crystal selector can also use it is cube-shaped, when graining section employs pros During body shape, its width can use 13mm.

This specific embodiment is only that it is not to limitation of the present utility model, ability to explanation of the present utility model Field technique personnel can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but As long as all protected in right of the present utility model by Patent Law.

Claims (3)

1. a kind of screw type crystal selector, including be sequentially connected the graining section (1) communicated and select brilliant section (2) to be characterized in that：It is described Select brilliant section (2) in the shape of a spiral, the raising angle for selecting brilliant section (2) is 33 degree, and described to select brilliant section (2) be highly 14.4mm, institute State and select brilliant section (2) a diameter of 3.2mm of spiral section, described to select brilliant section (2) pitch be 4.36mm.

A kind of 2. screw type crystal selector according to claim 1, it is characterised in that：Graining section (1) outer wall is highly 30mm, inside wall height 28.5mm.

A kind of 3. screw type crystal selector according to claim 2, it is characterised in that：The graining section (1) is in frustum, institute Graining section (1) inner surface taper is stated as 2 degree, graining end maximum outside diameter is 15mm, maximum inner diameter 12mm.