CN113155884B - Device and method for testing thermal stability of forging blank of welded rotor - Google Patents
Device and method for testing thermal stability of forging blank of welded rotor Download PDFInfo
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- CN113155884B CN113155884B CN202110248715.9A CN202110248715A CN113155884B CN 113155884 B CN113155884 B CN 113155884B CN 202110248715 A CN202110248715 A CN 202110248715A CN 113155884 B CN113155884 B CN 113155884B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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Abstract
The invention relates to the technical field of thermal stability tests of forging blanks for welding rotors, and particularly discloses a device for thermal stability tests of forging blanks for welding rotors. The test method specifically comprises the following steps: step S1: processing a forging blank; in the machining process, reserving allowance for the connecting end of the forging blank; step S2: connecting the forging blank with the lengthening shaft; step S3: mounting the forging blank in equipment for a thermal stability test; step S4: testing the thermal stability; step S5: after the test is finished, cutting off the allowance reserved for the forging blank; the invention can solve the problem that the thermal stability test cannot be carried out without a supporting position due to the size and structure limitations of the forging blank, and effectively ensures the safety of unit operation.
Description
Technical Field
The invention relates to the technical field of human thermal stability tests for a forged piece blank of a welded rotor, in particular to a device and a method for testing the thermal stability of the forged piece blank of the welded rotor.
Background
The thermal stability test is an assessment test for testing the stability and reliability of the rotor or the main shaft under a high-temperature state (working temperature), and is an important means and method for evaluating the manufacturing process and the quality of the rotor. Therefore, in order to ensure the quality of the power generation equipment and the safety, reliability and stability in the operation period, a thermal stability test is generally required to be carried out on a steam turbine rotor or a main shaft with higher working temperature.
With the continuous progress and development of high-quality wide-parameter steam turbine technology, a steam turbine rotor increasingly adopts a welding structure in order to meet the requirements of material performance and mechanical property at different working temperatures, and the steam turbine rotor is formed by welding a high-temperature region rotor and a low-temperature region rotor; the steam turbine rotor or the main shaft with higher working temperature generally requires a thermal stability test to test the manufacturing process level and the quality of the material of the rotor, but the forging blanks of the rotor in a high temperature area and the rotor in a low temperature area cannot be subjected to the thermal stability test due to lack of a supporting position, and the operation of the steam turbine still has certain potential safety hazard due to lack of the checking test.
Disclosure of Invention
The invention aims to solve the technical problem that the device and the method for testing the thermal stability of the forging blank for welding the rotor are provided, so that the problem that the thermal stability test cannot be carried out due to the fact that the size and the structure of the forging blank are limited without a supporting position can be solved, and the safety of unit operation is effectively guaranteed.
The technical problem to be solved by the invention is as follows:
on the one hand, the device for the thermal stability test of the forging blank of the welded rotor comprises a long connecting shaft and a surplus part detachably connected with the long connecting shaft, wherein the surplus part and the forging blank are integrally formed.
When the forging blank is processed, reserving a certain allowance at the connecting end of the forging blank, and forming an allowance part through the allowance; the extension shaft is connected with the allowance part when the thermal stability test is carried out; the supporting of the forging blank is realized through the matching of the allowance part and the extension shaft, so that the forging blank can be subjected to a thermal stability test in thermal stability test equipment; the length of the connecting shaft and the length of the allowance part can be controlled together according to the size of the forging blank and the size of the internal cavity of the thermal stability test equipment.
By adopting the structure, the problem that the thermal stability test cannot be carried out due to the fact that the size and the structure of the forging blank are limited without a supporting position can be solved, and the safety of unit operation is effectively guaranteed.
In some possible embodiments, the length of the allowance part along the long direction of the forging blank is D, and D is more than or equal to 500 mm.
In some possible embodiments, the axis of the elongated shaft in the long direction is collinear with the axis of the forging blank in the long direction.
In some possible embodiments, the connection manner of the elongated shaft and the margin portion is a threaded connection.
In some possible embodiments, the connection between the extension shaft and the margin portion is a bayonet connection.
In some possible embodiments, the connection manner of the elongated shaft and the margin part is a key connection.
In some possible embodiments, the connection mode of the elongated shaft and the margin part is a red sleeve connection.
On the other hand, the test method using the device for testing the thermal stability of the forging blank for welding the rotor specifically comprises the following steps:
step S1: processing a forging blank; in the machining process, reserving allowance for the connecting end of the forging blank;
step S2: connecting the forging blank with the lengthening shaft;
step S3: mounting the forging blank in equipment for a thermal stability test;
step S4: testing the thermal stability;
step S5: and (5) after the test is finished, cutting off the allowance reserved for the forging blank.
In some possible embodiments, the extension shaft and the allowance must be exposed to the outside of the device when the forging blank is installed.
Compared with the prior art, the invention has the beneficial effects that:
according to the size of an internal cavity of the thermal stability test equipment, a certain allowance is reserved at the connecting end of a forging blank to form an allowance part which is connected with the extension shaft; then the forging blank is integrally installed in the internal cavity, the extension shaft and the allowance part form a support and are exposed outside the thermal stability test equipment, and therefore the forging blank is tested in the thermal stability test equipment; the problem that a thermal stability test cannot be carried out due to the fact that the size and the structure of a forging blank are limited and no supporting position exists is effectively solved, and the safety of unit operation is effectively guaranteed;
the invention has simple structure and convenient operation.
Drawings
FIG. 1 is a schematic diagram of the connection relationship of the present invention;
FIG. 2 is a schematic view showing a connection relationship between the allowance part and a forging blank in the present invention;
FIG. 3 is a schematic structural view of a forging blank in the prior art;
wherein: 1. forging blank; 2. connecting a long shaft; 3. and a margin part.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Reference herein to "first," "second," and similar words, does not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
In the implementation of the present application, "and/or" describes an association relationship of associated objects, which means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone.
In the description of the embodiments of the present application, the meaning of "a plurality" means two or more unless otherwise specified. For example, the plurality of positioning posts refers to two or more positioning posts.
The invention is further illustrated with reference to the following figures and examples.
The invention is realized by the following technical scheme, as shown in figures 1-3,
on the one hand, the supporting device for the thermal stability test of the forging blank 1 of the welded rotor comprises a long connecting shaft 2 and a surplus portion 3 detachably connected with the long connecting shaft 2, wherein the surplus portion 3 and the forging blank 1 are integrally formed.
When the forging blank 1 is processed, reserving a certain allowance at the connecting end of the forging blank 1, and forming an allowance part 3 through the allowance; the extension shaft 2 is connected to the margin part 3 when a thermal stability test is performed; the supporting of the forging blank 1 is realized through the matching of the allowance part 3 and the extension shaft 2, so that the forging blank 1 can be subjected to a thermal stability test in thermal stability test equipment; the length of the extension shaft 2 and the length of the allowance part 3 can be controlled together according to the size of the forging blank 1 and the size of an internal cavity of the thermal stability test equipment.
By adopting the structure, the problem that the thermal stability test cannot be carried out due to the fact that the size and the structure of the forging blank 1 are limited and the supporting position is not available can be solved, and the safety of unit operation is effectively guaranteed.
The allowance part 3 and the long connecting shaft 2 adopt a detachable connection mode, so that the long connecting shaft 2 can be repeatedly used.
In some possible embodiments, the length of the allowance part 3 along the long direction of the forging blank 1 is D, and D is more than or equal to 500 mm.
The purpose of setting up like this can guarantee on the one hand to connect the effective connection of axle 2 and surplus portion 3 to make the support to forging blank 1 more firm.
In some possible embodiments, the axis of the long direction of the extension shaft 2 is on the same straight line with the axis of the long direction of the forging blank 1.
In order to effectively realize the detachable connection of the allowance part 3 and the extension shaft 2;
in some possible embodiments, the connection between the elongated shaft 2 and the margin 3 is a threaded connection.
In some possible embodiments, the elongated shaft 2 and the margin 3 are connected by a slit.
In some possible embodiments, the connection manner of the elongated shaft 2 and the margin 3 is a key connection.
In some possible embodiments, the connection manner of the elongated shaft 2 and the margin 3 is a shrink fit connection.
Preferably, the shaft extension 2 comprises a transition section detachably connected with the allowance part 3 and a shaft body connected with one end of the transition section far away from the allowance part 3;
preferably, when the transition section is in threaded connection with the allowance part 3, the allowance part 3 is provided with a threaded hole, the transition section is in a flange disc shape and is provided with a through hole matched with the threaded hole, and a bolt penetrates through the through hole to be connected with the threaded hole; the threaded holes are uniformly arranged in a plurality of annular shapes, and the circle center of each formed annular is located on the axis of the forging blank 1 in the length direction.
On the other hand, the test method using the device for testing the thermal stability of the forging blank for welding the rotor specifically comprises the following steps:
step S1: processing a forging blank 1; in the machining process, reserving allowance for the connecting end of the forging blank 1;
step S2: connecting a forging blank 1 with an extension shaft 2;
step S3: mounting the forging blank 1 in equipment for a thermal stability test;
step S4: testing the thermal stability; the specific working flow of the specific thermal stability test is the same as the existing flow and is not described in detail here;
step S5: and (5) after the test is finished, cutting off the allowance reserved in the forging blank 1, thereby obtaining the forging blank 1 meeting the size requirement.
In some possible embodiments, when the forging blank 1 is installed, the extension shaft 2 and the allowance part 3 are exposed outside the equipment and connected with a rotating mechanism for controlling the forging blank 1 to rotate in the thermal stability test equipment; in the testing process, the extension shaft is driven to rotate through the rotating mechanism, so that the forging blank 1 rotates in the thermal stability testing equipment, and the thermal stability test of the forging blank 1 in the thermal stability testing equipment is realized.
The foregoing detailed description of the embodiments of the present application has been presented, and specific examples have been applied in the present application to explain the principles and implementations of the present application, and the above description of the embodiments is only used to help understand the method and the core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (8)
1. A device for welding forging blank thermal stability of rotor is experimental, its characterized in that: the forging blank forming device comprises a long connecting shaft and a surplus part detachably connected with the long connecting shaft, wherein the surplus part and a forging blank are integrally formed; when the forging blank is installed, the extension shaft and the allowance portion must be exposed to the outside of the thermal stability test equipment.
2. The apparatus for testing thermal stability of a forging blank for welding a rotor of claim 1, wherein: the length of the allowance part along the length direction of the forging blank is D, and D is larger than or equal to 500 mm.
3. The apparatus for testing thermal stability of a forging blank for welding a rotor of claim 1, wherein: the axial line of the extension shaft in the length direction is in the same straight line with the axial line of the forging blank in the length direction.
4. The apparatus for testing thermal stability of a forging blank for welding a rotor according to any one of claims 1 to 3, wherein: the connecting mode of the long connecting shaft and the allowance part is threaded connection.
5. The apparatus for testing thermal stability of a forging blank for welding a rotor according to any one of claims 1 to 3, wherein: the connecting shaft is connected with the allowance part in a stop opening mode.
6. The apparatus for testing thermal stability of a forging blank for welding a rotor according to any one of claims 1 to 3, wherein: the connection mode of the long connecting shaft and the allowance part is key connection.
7. The apparatus for testing thermal stability of a forging blank for welding a rotor according to any one of claims 1 to 3, wherein: the connecting mode of the long connecting shaft and the allowance part is a red sleeve connection.
8. A test method using the forging blank thermal stability test device for welding rotors according to any one of claims 1 to 7, characterized in that: the method specifically comprises the following steps:
step S1: processing a forging blank; in the machining process, reserving allowance for the connecting end of the forging blank;
step S2: connecting the forging blank with the lengthening shaft;
step S3: mounting the forging blank in equipment for a thermal stability test;
step S4: testing the thermal stability;
step S5: and (5) after the test is finished, cutting off the allowance reserved for the forging blank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110248715.9A CN113155884B (en) | 2021-03-08 | 2021-03-08 | Device and method for testing thermal stability of forging blank of welded rotor |
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| CN202110248715.9A CN113155884B (en) | 2021-03-08 | 2021-03-08 | Device and method for testing thermal stability of forging blank of welded rotor |
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| CN113155884A CN113155884A (en) | 2021-07-23 |
| CN113155884B true CN113155884B (en) | 2022-04-26 |
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| CN113804715B (en) * | 2021-09-01 | 2024-04-12 | 上海电气上重铸锻有限公司 | Forging thermal stability test device and method |
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