CN109922545A - Graphite heating component, graphite heater and design method - Google Patents
Graphite heating component, graphite heater and design method Download PDFInfo
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Abstract
The present invention provides a kind of graphite heating component, graphite heater and design method, the graphite heater includes n-layer graphite heating component layer (n >=1), the n-layer graphite heating component layer constitutes axisymmetric terrace with edge structure, wherein, each layer of graphite heating component layer constitutes axisymmetric enclosed construction by the graphite heating component of several isosceles trapezoids in the circumferential, constitute the bottom edge composition regular polygon of the graphite heating component of each layer of graphite heating component layer, and the number of edges of each layer regular polygon is consistent, the circumscribed circle of each regular polygon is parallel and coaxial, the upper surface of the graphite heating component layer of i+1 layer is coplanar with the regular polygon bottom surface of i-th layer of graphite heating component layer and shape is identical, i=1, 2, ... n.The present invention can not only effectively reduce the specification and quantity of element, interchangeability is strong, installation facilitates by the way that graphite heating component is designed to isosceles trapezoidal structure；And for various sizes of revolving body or similar rotary structure, there is certain versatility, reduces testing expenses spending.
Description
Technical field
The invention belongs to the technical field of Flight Vehicle Structure heat test, it is related to a kind of graphite heating component, graphite heater
And design method, and in particular to a kind of to add for revolving body or similar to graphite heating component, the graphite of the testpieces of revolving body
Hot device and design method.
Background technique
As the Mach number of aircraft flight is higher and higher, corresponding Aerodynamic Heating problem is also increasingly severe, part
Maximum temperature is 1400 DEG C or more, and transient heat flow density is up to 1.2MW/m2More than, this is to traditional type ground environment structure heat examination
It tests and proposes higher technical requirements.
In the case where traditional quartz lamp heating temperature can only achieve 1200 DEG C~1300 DEG C, graphite is because of its heating temperature
High, the advantages that intensity is good, thermal conductivity is good, is more used as the radiant heater element in thermo-structural experiment；But compared to technology
Highly developed quartz lamp heating, graphite are started late, and the design method of graphite heater more can only be referring to quartz lamp
Heater.
Effectively to ensure the realisation of radiant heating effect, the heaters such as quartz lamp, graphite in thermo-structural experiment are equal
Using the retinue design method according to testpieces shape.Currently, the core component graphite heating component of graphite heater is usually joined
According to quartz lamp, it is designed to the club shaped structures such as U-shaped, S type, waveform.When it is conventional rectangular, round for being heated testpieces, stick
The graphite heater that shape structure graphite heating element is constituted can be good at realizing radiant heating effect；But when testpieces is revolution
Body or when being similar to rotary structure, such as conical structure, needed for the graphite heater of such club shaped structure not only results in
The specification of element and it is large number of, the production and processing period is long, costly, and the mechanical connection space at element both ends is small, operation
Cumbersome, installation process easily fractures.
Summary of the invention
Brief summary of the present invention is given below, in order to provide the basic reason about certain aspects of the invention
Solution.It should be appreciated that this summary is not an exhaustive overview of the invention.It is not intended to determine key of the invention
Or pith, nor is it intended to limit the scope of the present invention.Its purpose only provides certain concepts in simplified form, with
This is as the preamble in greater detail discussed later.
To solve the above problems, the present invention proposes a kind of stone graphite heating component, graphite heater and design method, this hair
Graphite heater, design method and the graphite heating component used of bright offer are particularly suitable for revolving body or are similar to revolving body examination
Test the thermo-structural experiment of part.
Technical solution of the invention:
On the one hand, the present invention provides a kind of graphite heater, the graphite heater include n-layer graphite heating component layer (n >=
1), the n-layer graphite heating component layer constitutes axisymmetric terrace with edge structure, wherein if each layer of graphite heating component layer by
The graphite heating component of dry isosceles trapezoid constitutes axisymmetric enclosed construction in the circumferential, constitutes each layer of graphite heating component
The bottom edge of the graphite heating component of layer forms regular polygon, and the number of edges of each layer regular polygon is consistent, outside each regular polygon
It is parallel and coaxial to connect circle, the upper surface of the graphite heating component layer of i+1 layer and the regular polygon of i-th layer of graphite heating component layer
Bottom surface is coplanar and shape is identical, i=1,2 ... n.
Further, the shaft section base angle θ of the graphite heating component layer is identical；
Further, the determination of the shaft section base angle θ of the graphite heating component layer is as follows: according to testpieces size with
And its heating required distance, a circular cone is designed, meet between the circular cone and testpieces: 1) circular cone can be by the testpieces packet
It wraps up in inside it, and 2) height of the circular cone and shaft section base angle meet the requirement of testpieces heating distance；Hence, it can be determined that
The height of the circular cone and shaft section base angle out；Enabling the shaft section base angle is the θ；
Further, in every layer of graphite heating component layer, each graphite heating component is all the same.
Further, in every layer of graphite heating component layer, the quantity of graphite heating component element is all the same, and many
In 3；
Further, the graphite heater further includes water cooled electrode, reflecting plate and bracket, wherein in graphite heating
On the basis of component placement, the water cooled electrode, reflecting plate and bracket are designed around the layout.
Further, in the multiple graphite heating component, the upper and lower ends of any one graphite heating component are machined with
Electrode, and water cooled electrode connection, then the two is whole is assemblied on water cooling reflecting plate, and the reflecting plate of the water cooling is mounted on
On the bracket.
On the other hand, the present invention also provides a kind of design methods of graphite heater comprising the cloth of graphite heating component
Office's design, is realized by following steps:
Step 1 designs a circular cone based on testpieces,
According to testpieces size and its heating required distance, a circular cone is designed, is met between the circular cone and testpieces: 1)
The circular cone can by the testpieces wrap up inside it, and 2) cone height and shaft section base angle meet testpieces heating away from
From requirement；Hence, it can be determined that going out height and the shaft section base angle of the circular cone；
The step can be carried out according to techniques well known and actual demand；
Step 2, the layout of graphite heating component,
Based on step 1 gained circular cone, the layout of graphite heating component is carried out, wherein the graphite heating component layout
For n-layer graphite heating component layer (n >=1), the n-layer graphite heating component layer constitutes axisymmetric terrace with edge structure, wherein every
One layer of graphite heating component layer constitutes axisymmetric enclosed construction by the graphite heating component of several isosceles trapezoids in the circumferential,
Constitute the bottom edge composition regular polygon of the graphite heating component of each layer of graphite heating component layer, and the number of edges of each layer regular polygon
Unanimously, the circumscribed circle of each regular polygon is parallel and coaxial, the upper surface of the graphite heating component layer of i+1 layer and i-th layer of stone
The regular polygon bottom surface of black heating element is coplanar and shape is identical, i=1,2 ... n；
Moreover, enabling:
The shaft section base angle of n-layer graphite heating component layer is the shaft section base angle of the circular cone；
The circumscribed circle of each regular polygon is coplanar with the cross section (perpendicular to the face of the axis of circular cone) of the circular cone；
The circumscribed circle of the regular polygon of the last layer is the bottom surface of the circular cone in graphite heating component layer；
Specific layout method is as follows:
2.1 determine the number of plies of graphite heating component layer,
The determination principle of the number of plies are as follows: 1), the number of plies be no less than 1 layer, and 2), the number of plies be no less than on testpieces plus
The number of hot warm area；
2.2 determine each high layer by layer of graphite heating component layer,
Demand can be divided according to the specific warm area of testpieces carry out value；
2.3, determine the quantity of the graphite heating component in every layer of graphite heating component layer,
The graphite heating component number of every layer of graphite heating component layer is equal, and no less than 3；
2.4, determine remaining side length and height of the graphite heating component of each isosceles trapezoid.
Further, remaining side length of the graphite heating component of each isosceles trapezoid and height are obtained by following formula:
ROutside=a/2sin (π/m) (1)
H=Hs/in θ (2)
L=a-2htan (π/m) (3)
In formula, ROutside- circumradius；
A-regular polygon side length, it is also long for the bottom of isosceles trapezoid；
M-regular polygon number of edges；
H-isosceles trapezoid height；
The layer that H-isosceles trapezoid corresponds to alignment layer is high, divides demand according to the specific warm area of testpieces in thermo-structural experiment
Carry out value；
The upper bottom of l-isosceles trapezoid is long.
Finally, the shape of the graphite heating component is isosceles trapezoid the present invention also provides a kind of graphite heating component
Structure.
The present invention compared with the prior art the utility model has the advantages that
The club shaped structures such as U-shaped, S type, waveform are generally designed to based on existing graphite heating component, when testpieces is back
When swivel or similar rotary structure, the graphite heater that such club shaped structure is constituted not only result in required element specification and
It is large number of, the production and processing period is long, costly, and the mechanical connection space at element both ends is small, cumbersome, installation process
Easily fracture；
The present invention can not only effectively reduce the rule of element by the way that graphite heating component is designed to isosceles trapezoidal structure
Lattice and quantity, interchangeability is strong, installation facilitates；And for various sizes of revolving body or similar rotary structure, have certain
Versatility reduces testing expenses spending.
In addition, the present invention is laid out for the graphite heating component of multiple isosceles trapezoids in graphite heater, effectively
It ensure that radiation effect, and connect easy, be not susceptible to destroy in installation process, graphite heater provided by the invention, design
Method and graphite heating component used are particularly suitable for revolving body or the thermo-structural experiment similar to revolving body testpieces, solve
Such testpieces is not easy or even is difficult to carry out the problem for the thermo-structural experiment for meeting the demand of being evenly heated, and design side of the invention
Method and structure have universality, have a wide range of application, have great application prospect.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram for graphite heater that specific embodiment provides according to the present invention；
Fig. 2 be according to the present invention specific embodiment provide graphite heater in graphite heating component schematic layout pattern；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is a kind of structural schematic diagram for graphite heating component that specific embodiment provides according to the present invention；
In the attached drawing:
1 graphite heating component, 2 water cooling reflecting plates, 3 water cooled electrodes, 4 bracket bases, 5 testpieces.
Specific embodiment
Specific embodiments of the present invention are described in detail below in conjunction with attached drawing.In the following description, for solution
Purpose and not restrictive is released, elaborates detail, to help to be apparent from the present invention.However, to those skilled in the art
It is readily apparent that the present invention can also be practiced in the other embodiments departing from these details for member.
It should be noted that only showing in the accompanying drawings in order to avoid having obscured the present invention because of unnecessary details
Gone out with closely related device structure and/or processing step according to the solution of the present invention, and be omitted with relationship of the present invention not
Big other details.
As shown in Figs 1-4, a kind of graphite heater is provided according to a particular embodiment of the invention, the graphite heater packet
The layer of graphite heating component containing n-layer (n >=1), the n-layer graphite heating component layer constitute axisymmetric terrace with edge structure, wherein every
One layer of graphite heating component layer constitutes axisymmetric closing by the graphite heating component 1 of several isosceles trapezoids in the circumferential and ties
Structure, the bottom edge composition regular polygon of the graphite heating component 1 of each layer of graphite heating component layer of composition, and each layer regular polygon
Number of edges is consistent, and the circumscribed circle of each regular polygon is parallel and coaxial, the upper surface and i-th of the graphite heating component layer of i+1 layer
The regular polygon bottom surface of layer graphite heating component layer is coplanar and shape is identical, i=1,2 ... n.
Using such configuration mode, by the way that graphite heating component is designed to isosceles trapezoidal structure, with existing rodlike stone
Black heater is compared, and on the basis of guaranteeing radiation effect, isosceles trapezoid graphite heater of the invention, which has, designs simple, rule
Lattice type is few, installation is convenient, versatile advantage.
Further, as a specific embodiment of the invention, the shaft section base angle θ of the graphite heating component layer
It is identical；Using such configuration mode, sets identical for the shaft section base angle of graphite heating component layer, can guarantee graphite heating
The form-dependent character of device, and then guarantee the uniformity of graphite radiation heating.
Further, in the present invention, when the shaft section base angle θ of the graphite heating component layer is identical；The axis
The determination of section base angle θ is as follows: according to testpieces size and its heating required distance, designing a circular cone, the circular cone and test
Meet between part: 1) circular cone can wrap up the testpieces inside it, and the 2) height of the circular cone and shaft section base angle
Meet the requirement of testpieces heating distance；Hence, it can be determined that going out height and the shaft section base angle of the circular cone；Enable the shaft section bottom
Angle is the θ；
Further, for the form-dependent character of the simplicity of operation and guarantee graphite heater, every layer of graphite heating member
In part layer, each graphite heating component 1 is all the same, and in every layer of graphite heating component layer, the number of graphite heating component element
Measure it is all the same, and no less than 3；
Further, in order to guarantee the integrality and normal work of graphite heater, the graphite heater further includes
Water cooled electrode 3, water cooling reflecting plate 2 and bracket base 4, wherein on the basis of graphite heating component layout, the water cooled electrode
3, water cooling reflecting plate 2 and bracket base 4 are designed around the layout, specific:
The water cooled electrode 3 is used for the transmission and supply of 1 heating voltage of graphite heating component, on graphite heating component 1
The both ends for being machined with electrode are connected by through-hole；Then the two is integrally assembled on water cooling reflecting plate 2 again, the water cooling is anti-
Penetrating plate can be one or more, and size is determined according to specific heating condition, and dimensions is not necessarily identical；
The bracket base 4 is used for the integrated support and fixation of graphite heater, wherein the reflecting plate 2 of the water cooling
It is mounted on the bracket base 4.
Further, as a specific embodiment of the invention, the graphite heating component 1 can be U-shaped, S type
Or the isosceles trapezoidal structure of waveform.
On the other hand, as shown in Figs 1-4, another specific embodiment also provides a kind of above-mentioned graphite heater according to the present invention
Design method, the layout designs including graphite heating component 1 are realized by following steps:
1, it is primarily based on the testpieces 5 and designs a circular cone, specifically:
According to 5 size of testpieces and its heating required distance, a circular cone, the circular cone and the testpieces 5 are designed
Between meet: 1) circular cone can wrap up the testpieces 5 inside it, and 2) cone height and shaft section base angle meet
The requirement of the testpieces heating distance；Hence, it can be determined that going out height and the shaft section base angle of the circular cone；
The step can be carried out according to techniques well known and actual demand, no longer specifically be repeated herein；
2, the layout of graphite heating component,
Based on the resulting circular cone of above-mentioned steps 1, the layout of graphite heating component 1 is carried out, wherein the graphite heating member
The layout of part 1 is in n-layer graphite heating component layer (n >=1), and the n-layer graphite heating component layer constitutes axisymmetric terrace with edge structure,
Wherein, each layer of graphite heating component layer is made of axisymmetric in the circumferential the graphite heating component 1 of several isosceles trapezoids
Enclosed construction, the bottom edge for constituting the graphite heating component 1 of each layer of graphite heating component layer forms regular polygon, and each layer is just more
The number of edges of side shape is consistent, and the circumscribed circle of each regular polygon is parallel and coaxial, the upper surface of the graphite heating component layer of i+1 layer
It is coplanar with the regular polygon bottom surface of i-th layer of graphite heating component layer and shape is identical, i=1,2 ... n；
And, wherein it enables:
1) the shaft section base angle of n-layer graphite heating component layer is the shaft section base angle of the circular cone；
2) circumscribed circle of each regular polygon is coplanar with the cross section (perpendicular to the face of the axis of circular cone) of the circular cone；
3) in graphite heating component layer the regular polygon of the last layer circumscribed circle be the circular cone bottom surface；
Specific layout method is as follows:
2.1 determine the number of plies of graphite heating component layer,
The determination principle of the number of plies are as follows: 1), the number of plies be no less than 1 layer, and 2), the number of plies be no less than on testpieces plus
The number of hot warm area；
2.2 determine each high layer by layer of graphite heating component layer,
Demand can be divided according to the specific warm area of testpieces carry out value；
2.3, determine the quantity of the graphite heating component in every layer of graphite heating component layer,
The graphite heating component number of every layer of graphite heating component layer is equal, and no less than 3；It can determine at this time just polygon
The number of edges of shape is that is, equal with every layer of graphite heating component quantity；
2.4, determine remaining side length and height of the graphite heating component of each isosceles trapezoid.
Further, remaining side length of the graphite heating component of each isosceles trapezoid and height are obtained by following formula:
ROutside=a/2sin (π/m) (1)
H=H/sin θ (2)
L=a-2htan (π/m) (3)
In formula, ROutside- circumradius；
A-regular polygon side length, it is also long for the bottom of isosceles trapezoid；
M-regular polygon number of edges；
H-isosceles trapezoid height；
The layer that H-isosceles trapezoid corresponds to alignment layer is high, divides demand according to the specific warm area of testpieces in thermo-structural experiment
Carry out value；
The upper bottom of l-isosceles trapezoid is long.
In order to have a better understanding of the present invention, the stone in 1~4 pair of graphite heater of the invention with reference to the accompanying drawing
The layout of black heating element is described in detail.
As shown in figures 1-4, described by taking testpieces is conical structure as an example as a specific embodiment of the invention
Graphite heater in graphite heating component layout specifically design it is as follows:
1, a circular cone is designed according to the size of conical testpieces and heating required distance first, in the present embodiment, institute
The bottom surface radius for stating conical testpieces is R0, shaft section base angle θ, at this point, designed circular cone is on the one hand by the circle
Taper testpieces includes that inside it, on the other hand, the height of circular cone and shaft section base angle meet the testpieces heating distance
Requirement, therefore, the present embodiment design the circular cone bottom surface radius be R0+ [50mm, 100mm], and the shaft section bottom of the circular cone
Angle is the shaft section base angle of the conical testpieces, and on the basis of meeting above-mentioned condition, the height of the circular cone can basis
Actual needs is selected；
2, based on above-mentioned designed circular cone, the layout of graphite heating component is carried out:
Wherein, graphite heating component layout is in n-layer graphite heating component layer (n >=1), and the n-layer graphite adds
Thermal element layer constitutes axisymmetric terrace with edge structure, wherein each layer of graphite heating component layer by several isosceles trapezoids graphite
Heating element constitutes axisymmetric enclosed construction in the circumferential, constitutes the graphite heating component of each layer of graphite heating component layer
Bottom edge forms regular polygon, and the number of edges of each layer regular polygon is consistent, and the circumscribed circle of each regular polygon is parallel and coaxial, i-th+
The upper surface of 1 layer of graphite heating component layer is coplanar with the regular polygon bottom surface of i-th layer of graphite heating component layer and shape is identical,
I=1,2 ... n；
Moreover, enabling:
1) the shaft section base angle θ of graphite heating component layer, the θ is given value at this time；
2) circumscribed circle of each regular polygon is coplanar with the cross section (perpendicular to the face of the axis of circular cone) of the circular cone；
3) in graphite heating component layer the circumscribed circle of the regular polygon of the last layer be the circular cone bottom surface, i.e., this is external
Round radius ROutsideFor R0+ [50mm, 100mm], the i.e. circumscribed circle of the bottom surface regular polygon of the graphite heating component layer of the last layer
Radius is given value；
To sum up, the bottom surface regular polygon at the shaft section base angle and the last layer of the graphite heating component layer of each layer is external
Radius of circle has determined that；
Specifically it is laid out:
2.1, principle is determined according to the number of plies of graphite component heating element, the present embodiment determines that the number of plies is 4 layers；
2.2, it is determining each high layer by layer based on the size of testpieces warm area on the basis of the above-mentioned number of plies determines, and this reality
Apply example respectively high satisfaction layer by layer: H01+H12+H23+H34=R0·tanθ；Wherein: H01The layer of-first layer isosceles trapezoid is high；H12- the
The layer of two layers of isosceles trapezoid is high；H23The layer of-third layer isosceles trapezoid is high；H34The layer of-the four layer of isosceles trapezoid is high；
2.3, determine the quantity of the graphite heating component in every layer of graphite heating component layer,
It is 20 that the present embodiment is preferably every layer as needed, the icosagon that is positive of every layer of bottom edge composition；
2.4, determine remaining side length and height of the graphite heating component of each isosceles trapezoid, specifically:
Known cone testpieces bottom surface radius R0, shaft section base angle θ and each layer it is respectively high layer by layer, while ROutsideValue is slightly larger
In R050~100mm of value；It then utilizes in preceding formula, and then the List Of Physical Dimensions of four layers of isosceles trapezoid graphite heating component are obtained,
As shown in table 1.
Further, it after the outer dimension of the graphite heating component of clearly each isosceles trapezoid, needs to comprehensively consider machinery
The problems such as intensity, processing, connection, the final thickness and current path width for determining element, a kind of typical S of structure of the invention
The graphite heating component embodiment of the isosceles trapezoid of type is as shown in Figure 4.
The List Of Physical Dimensions of 1 four layers of isosceles trapezoid graphite heating component of table
Wherein, a1The bottom of-first layer isosceles trapezoid；a2The bottom of-second layer isosceles trapezoid；a3- third layer isosceles
Trapezoidal bottom；a4The bottom of-the four layer of isosceles trapezoid.
A kind of conical graphite heater provided by the invention, in thermal structural analysis the characteristics of conical testpieces,
By the way that graphite heating component is designed to isosceles trapezoidal structure, the specification and quantity of element can be effectively reduced；And for
Various sizes of circular cone heater, isosceles trapezoidal structure of the invention have certain versatility.
A kind of conical graphite heater provided by the invention, in thermal structural analysis the characteristics of conical testpieces,
By the way that graphite heating component is designed to isosceles trapezoidal structure, the specification and quantity of element, and unit can be effectively reduced
The outer dimension of isosceles trapezoidal structure is larger under area, is more convenient for being mechanically connected.
As above it describes for a kind of embodiment and/or the feature that shows can be in a manner of same or similar at one or more
It is used in a number of other embodiments, and/or combines or substitute the feature in other embodiments with the feature in other embodiments
It uses.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when using herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step, component or combinations thereof.
The many features and advantage of these embodiments are clear according to the detailed description, therefore appended claims are intended to
Cover all these feature and advantage of these embodiments fallen into its true spirit and range.Further, since this field
Technical staff is readily apparent that many modifications and changes, therefore is not meant to for the embodiment of the present invention to be limited to illustrated and description essence
Really structurally and operationally, but all suitable modifications and the equivalent fallen within the scope of its can be covered.
Unspecified part of the present invention is known to the skilled person technology.
Claims (10)
1. a kind of graphite heater, it is characterised in that: the graphite heater includes n-layer graphite heating component layer (n >=1), described
N-layer graphite heating component layer constitute axisymmetric terrace with edge structure, wherein each layer of graphite heating component layer is by several isosceles
Trapezoidal graphite heating component constitutes axisymmetric enclosed construction in the circumferential, constitutes the graphite of each layer of graphite heating component layer
The bottom edge of heating element forms regular polygon, and the number of edges of each layer regular polygon is consistent, and the circumscribed circle of each regular polygon is parallel
And it is coaxial, the upper surface of the graphite heating component layer of i+1 layer is coplanar with the regular polygon bottom surface of i-th layer of graphite heating component layer
And shape is identical, i=1,2 ... n.
2. a kind of graphite heater according to claim 1, which is characterized in that the axis of the graphite heating component layer is cut
Face base angle θ is identical.
3. a kind of graphite heater according to claim 2, which is characterized in that the axis of the graphite heating component layer is cut
When face base angle θ is identical；The determination of the shaft section base angle θ is as follows: according to testpieces size and its heating required distance, if
Count a circular cone, meet between the circular cone and testpieces: 1) circular cone can wrap up the testpieces inside it, and the 2) circle
The height of cone and shaft section base angle meet the requirement of testpieces heating distance；Hence, it can be determined that going out the height and axis of the circular cone
Section base angle；Enabling the shaft section base angle is the θ.
4. a kind of graphite heater according to claim 1 to 3, which is characterized in that in the n-layer graphite heating component layer,
Graphite heating component in each layer is all the same.
5. a kind of graphite heater described in -4 according to claim 1, which is characterized in that in the n-layer graphite heating component layer,
The quantity of graphite heating component element is all the same, and no less than 3.
6. a kind of graphite heating component for thermo-structural experiment described in -5 according to claim 1, it is characterised in that: described
Graphite heater further includes water cooled electrode, reflecting plate and bracket, wherein on the basis of graphite heating component layout, the water
Cold electrode, reflecting plate and bracket are designed around the layout.
7. a kind of graphite heating component for thermo-structural experiment according to claim 6, it is characterised in that: the multiple
In graphite heating component, the upper and lower ends of any one graphite heating component are machined with electrode, and water cooled electrode connection, then
The two is integrally assemblied on water cooling reflecting plate, and the reflecting plate installation of the water cooling is on the bracket.
8. a kind of design method of graphite heater comprising the layout designs of graphite heating component, which is characterized in that by with
Lower step is realized:
Step 1 designs a circular cone based on testpieces,
According to testpieces size and its heating required distance, a circular cone is designed, is met between the circular cone and testpieces: 1) circle
Cone can wrap up the testpieces inside it, and 2) cone height and shaft section base angle meet testpieces heating distance
It is required that；Hence, it can be determined that going out height and the shaft section base angle of the circular cone；
The step can be carried out according to techniques well known and actual demand；
Step 2, the layout of graphite heating component,
Based on step 1 gained circular cone, the layout of graphite heating component is carried out, wherein the graphite heating component layout is n-layer
Graphite heating component layer (n >=1), the n-layer graphite heating component layer constitute axisymmetric terrace with edge structure, wherein each layer
Graphite heating component layer constitutes axisymmetric enclosed construction by the graphite heating component of several isosceles trapezoids in the circumferential, constitutes
The bottom edge of the graphite heating component of each layer of graphite heating component layer forms regular polygon, and the number of edges one of each layer regular polygon
It causes, the circumscribed circle of each regular polygon is parallel and coaxial, the upper surface of the graphite heating component layer of i+1 layer and i-th layer of graphite
The regular polygon bottom surface of heating element is coplanar and shape is identical, i=1,2 ... n；
Moreover, enabling:
The shaft section base angle of n-layer graphite heating component layer is the shaft section base angle of the circular cone；
The circumscribed circle of each regular polygon is coplanar with the cross section (perpendicular to the face of the axis of circular cone) of the circular cone；
The circumscribed circle of the regular polygon of the last layer is the bottom surface of the circular cone in graphite heating component layer；
Specific layout method is as follows:
2.1 determine the number of plies of graphite heating component layer,
The determination principle of the number of plies are as follows: 1), the number of plies be no less than 1 layer, and 2), the number of plies be no less than on testpieces heat temperature
The number in area；
2.2 determine each high layer by layer of graphite heating component layer,
Demand can be divided according to the specific warm area of testpieces carry out value；
2.3, determine the quantity of the graphite heating component in every layer of graphite heating component layer,
The graphite heating component number of every layer of graphite heating component layer is equal, and no less than 3；
2.4, determine remaining side length and height of the graphite heating component of each isosceles trapezoid.
9. a kind of design method of graphite heater according to claim 8, it is characterised in that:
Remaining side length and height of the graphite heating component of each isosceles trapezoid are obtained by following formula:
ROutside=a/2sin (π/m) (1)
H=H/sin θ (2)
L=a-2htan (π/m) (3)
In formula, ROutside- circumradius；
A-regular polygon side length, it is also long for the bottom of isosceles trapezoid；
M-regular polygon number of edges；
H-isosceles trapezoid height；
The layer that H-isosceles trapezoid corresponds to alignment layer is high, divides demand according to the specific warm area of testpieces in thermo-structural experiment and carries out
Value；
The upper bottom of l-isosceles trapezoid is long.
10. a kind graphite heating component, it is characterised in that: the shape of the graphite heating component is isosceles trapezoidal structure.
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| CN109922545B (en) | 2021-12-10 |
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