Tool for machining steam chamber of steam turbine

Abstract

The utility model belongs to the field of steam turbines, and provides a steam turbine steam chamber machining tool which comprises a base, a core and a flange seat. Wherein the core is connected to the center of the base; the flange seat comprises a cylindrical body, an upper flange and a lower flange, the upper flange and the lower flange are connected to the two ends of the cylindrical body respectively, the cylindrical body is movably arranged on the core in a sleeving mode and can rotate around the central axis of the base, the upper flange is used for being detachably connected with a target steam turbine steam chamber, an annular groove coaxial with the cylindrical body is further formed in the upper flange, and the lower flange is detachably connected with the base.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of steam turbines, and particularly relates to a tool for machining a steam chamber of a steam turbine. BACKGROUND

[0002] In the field of steam turbine manufacturing, a steam chamber is a crucial component, and the manufacturing quality thereof is directly related to the overall performance and reliability of the steam turbine. The steam chamber has multiple surfaces that need to be precisely machined, and the relative positional relationship between these machining surfaces must be maintained to ensure correct assembly and function realization of the steam chamber in the steam turbine. When an enterprise has multiple machining devices, different surfaces of the steam chamber can be machined simultaneously by configuring multiple stations, thereby significantly improving production efficiency. However, such a configuration not only occupies a large amount of space but also requires high investment costs. Therefore, in the case of only a single machining machine tool, the posture of the steam chamber needs to be quickly and accurately adjusted through tool design. However, the existing steam chamber machining tool can only adjust the posture of the steam chamber to a certain extent, and often has the problems of complex structure and cumbersome operation, which not only increases the manufacturing cost but also reduces the reliability and durability of the tool. Therefore, it is necessary to solve the above technical problems. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the embodiment of the application is to provide a tool for machining a steam chamber of a steam turbine to solve the technical problem of complex structure of the tool for machining the steam chamber of the steam turbine in the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the application is to provide a tool for machining a steam chamber of a steam turbine, comprising:

[0005] a base;

[0006] a core connected to the center of the base;

[0007] a flange seat comprising a cylindrical body and an upper flange and a lower flange respectively connected to both ends of the cylindrical body, the cylindrical body being movably sleeved on the core and being able to rotate around the central axis of the base, the upper flange being used for detachable connection with a target steam chamber of a steam turbine and a ring groove coaxial with the cylindrical body being further formed on the upper flange, and the lower flange being detachably connected with the base.

[0008] Optionally, the tool for machining the steam chamber of the steam turbine further comprises a taper pin.

[0009] The first connecting hole is formed on the base for inserting the taper pin, the second connecting hole is formed on the lower flange for inserting the taper pin, the second connecting hole is spaced multiple around the central axis of the base, the first connecting hole and the second connecting hole have a preset relative position relationship so that the second connecting hole can be connected with the first connecting hole during the rotation of the flange seat.

[0010] Optionally, the second connecting hole is provided four around the central axis of the base evenly distributed.

[0011] Optionally, the first connecting hole and the second connecting hole are both tapered holes with large end towards the upper flange, and the taper pin is a tapered body adapted to the first connecting hole and the second connecting hole.

[0012] Optionally, the taper pin includes a screw segment and a taper rod segment for extending into the first connecting hole and the second connecting hole, and the turbine steam chamber processing tool further includes a nut and a sleeve.

[0013] The nut is threadedly connected with the screw segment, and the sleeve is arranged between the nut and the lower flange and forms a hole for the taper pin to pass through.

[0014] Optionally, the base forms a circular table with a boss near the side of the lower flange, the lower flange abuts against the circular table, and the outer diameter of the circular table is smaller than the outer diameter of the lower flange.

[0015] Optionally, the flange seat further includes a cover plate.

[0016] The cover plate is detachably connected to one end of the cylindrical body near the upper flange and cooperates with the cylindrical body to form a cavity for accommodating the core.

[0017] The steam turbine steam chamber processing tooling provided by the application has the beneficial effects that, compared with the prior art, the steam turbine steam chamber processing tooling provided by the application is provided with a base, a core and a flange seat. The cylindrical body of the flange seat can rotate around the central axis of the base by being sleeved on the core, the upper flange can be connected with the target steam turbine steam chamber, and the annular groove formed on the upper flange can be used for accurately positioning the target steam turbine steam chamber. Since the core connected with the base can ensure that the central axis of the rotation of the flange seat is constant, and since the lower flange abutting against the base can well avoid the flange seat from tilting, when the processing of one side surface of the target steam turbine steam chamber is completed, the lower flange can be disconnected with the base, so that the target steam turbine steam chamber can rotate around the central axis of the base with the flange seat, so as to rotate another surface to be processed to a position suitable for the processing machine tool, thereby the steam turbine steam chamber processing tooling provided by the application realizes the processing posture adjustment effect of the steam turbine steam chamber through simple structure design, and the adjustment process is stable and fast, which is much better than the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a top view of the overall structure of the steam turbine steam chamber processing tooling in the embodiments of the present application.

[0020] Figure 2 It is a schematic view of the cross-sectional structure along the A-A direction in the embodiments of the present application. Figure 1

[0021] In the drawings, the reference signs are as follows: 100, base; 101, first connecting hole; 102, circular table; 200, core; 300, flange seat; 301, cylindrical body; 302, upper flange; 303, lower flange; 304, annular groove; 305, second connecting hole; 306, cover plate; 400, taper pin; 401, screw rod section; 402, taper rod section; 500, nut; 600, sleeve; 1000, target steam turbine steam chamber. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects of the present application more clearly understood, the following will further describe the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0023] ​It should be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0025] In addition, the terms "first", "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0026] Please refer to Figure 1 and Figure 2 , a steam turbine steam chamber processing tool provided by the embodiment of the present application will be described. The steam turbine steam chamber processing tool includes a base 100, a core 200 and a flange seat 300. Among them:

[0027] The core 200 is connected at the center of the base 100; the flange seat 300 includes a cylindrical body 301 and an upper flange 302 and a lower flange 303 connected at both ends of the cylindrical body 301 respectively, the cylindrical body 301 is movably sleeved on the core 200 and can rotate around the center axis of the base 100, the upper flange 302 is used for detachable connection with the target steam turbine steam chamber 1000, and the upper flange 302 further forms a ring groove 304 coaxial with the cylindrical body 301, and the lower flange 303 is detachably connected with the base 100. In the embodiment, the upper flange 302 and the target steam turbine steam chamber 1000 and the lower flange 303 and the base 100 can be connected by bolts commonly used in the art, and the bolts can be provided in plurality, which will not be described in detail here.

[0028] According to the above structure provided in the embodiment, the tool for machining steam chamber of steam turbine provided in the embodiment comprises a base 100, a core 200 and a flange base 300. The cylindrical body 301 of the flange base 300 can rotate around the central axis of the base 100 by being sleeved on the core 200, the upper flange 302 can be connected with the target steam chamber 1000, and the annular groove 304 formed on the upper flange 302 can be used for accurately positioning the target steam chamber 1000. Since the core 200 connected with the base 100 can ensure that the central axis of the flange base 300 is constant, and since the lower flange 303 abutting against the base 100 can well avoid the flange base 300 from tilting, when the machining of one side surface of the target steam chamber 1000 is completed, the lower flange 303 can be disconnected with the base 100, so that the target steam chamber 1000 can rotate around the central axis of the base 100 with the flange base 300, thereby rotating another surface to be machined to a position suitable for the machining machine tool. Therefore, the tool for machining steam chamber of steam turbine provided in the embodiment can realize the adjustment of the machining posture of the steam chamber through simple structure design, and the adjustment process is stable and fast, which is much better than the prior art.

[0029] In another embodiment of the present application, referring to Figure 1 and Figure 2 , the tool for machining steam chamber of steam turbine further comprises a taper pin 400, a first connecting hole 101 for inserting the taper pin 400 is formed on the base 100, and a second connecting hole 305 for inserting the taper pin 400 is formed on the lower flange 303. The second connecting hole 305 is spaced apart around the central axis of the base 100, and the first connecting hole 101 and the second connecting hole 305 have a predetermined relative position relationship so that the second connecting hole 305 can be connected with the first connecting hole 101 during the rotation of the flange base 300. It can be understood that when the flange base 300 needs to be rotated, the taper pin 400 can be taken out from the first connecting hole 101 and the second connecting hole 305.

[0030] According to the above structure provided in the embodiment, during the rotation of the flange base 300, the plurality of second connecting holes 305 can be connected with the first connecting hole 101 in sequence, so that when the taper pin 400 is inserted into the first connecting hole 101 and the second connecting hole 305, a certain relative position relationship between the lower flange 303 and the base 100 can be formed. When the interval angle between the second connecting holes 305 is designed according to the interval angle between the surfaces to be machined of the target steam chamber 1000, the target steam chamber 1000 connected with the upper flange 302 can rotate a certain surface to be machined to be suitable for the machining machine tool, thereby further improving the adjustment accuracy of the tool for machining steam chamber of steam turbine in the embodiment.

[0031] In another embodiment of the present application, please refer to Figure 1 and Figure 2 , the second connecting holes 305 are arranged evenly around the central axis of the base 100. According to the above structure provided in the present embodiment, the four second connecting holes 305 arranged evenly around the central axis of the base 100 can make the flange base 300 form four different rotational phases relative to the base 100, which is conducive to further improve the adjustment accuracy of the tooling for processing the steam chamber of the steam turbine in the present embodiment.

[0032] In another embodiment of the present application, please refer to Figure 1 and Figure 2 , the first connecting hole 101 and the second connecting hole 305 are both tapered holes with large ends facing the upper flange 302, and the taper pin 400 is a tapered body adapted to the first connecting hole 101 and the second connecting hole 305. According to the above structure provided in the present embodiment, the first connecting hole 101 and the second connecting hole 305 arranged as tapered holes with large ends facing the upper flange 302 can make it more convenient for the taper pin 400 to be inserted and removed, and in addition, the taper pin 400 arranged as a tapered body can also make the taper pin 400 remain in a more stable state in the first connecting hole 101 and the second connecting hole 305, which is conducive to further improve the adjustment accuracy of the tooling for processing the steam chamber of the steam turbine in the present embodiment.

[0033] In another embodiment of the present application, please refer to Figure 1 and Figure 2 , the taper pin 400 includes a screw rod section 401 and a taper rod section 402 for inserting into the first connecting hole 101 and the second connecting hole 305, and the tooling for processing the steam chamber of the steam turbine further includes a nut 500 and a sleeve 600; the nut 500 is threadedly connected with the screw rod section 401, and the sleeve 600 is arranged between the nut 500 and the lower flange 303 and forms a hole through which the taper pin 400 passes. According to the above structure provided in the present embodiment, when the operator twists the nut 500, the screw rod section 401 threadedly connected with the nut 500 can be moved along the axial direction of the nut 500, so that the taper pin 400 can be conveniently removed from the first connecting hole 101 and the second connecting hole 305, which is conducive to further improve the adjustment efficiency of the tooling for processing the steam chamber of the steam turbine in the present embodiment.

[0034] In another embodiment of the present application, please refer to Figure 1 and Figure 2, the bottom base 100 forms a convex circular platform 102 on the side close to the lower flange 303, the lower flange 303 abuts against the circular platform 102, wherein the outer diameter of the circular platform 102 is smaller than that of the lower flange 303. According to the above structure provided in the embodiment, since there is wear between the lower flange 303 and the bottom base 100, the circular platform 102 formed on the bottom base 100 can make the bottom base 100 be used stably for a longer time, and since the outer diameter of the circular platform 102 is smaller than that of the lower flange 303, the cuttings and sundries generated during machining are not easy to enter between the circular platform 102 and the bottom base 100, so as to significantly improve the service life of the tooling for machining the steam chamber of the steam turbine in the embodiment.

[0035] In another embodiment of the present application, referring to Figure 1 and Figure 2 , the flange base 300 further comprises a cover plate 306, which is detachably connected to the end of the cylindrical body 301 close to the upper flange 302 and cooperates with the cylindrical body 301 to form a cavity for accommodating the wick 200. According to the above structure provided in the embodiment, the cover plate 306 detachably connected to the cylindrical body 301 can on the one hand facilitate the maintenance of the wick 200, and on the other hand can effectively prevent foreign matters from entering the space between the wick 200 and the cylindrical body 301, so as to further improve the service life of the tooling for machining the steam chamber of the steam turbine in the embodiment.

[0036] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tool for machining a steam chamber of a steam turbine, characterized by comprising: It comprises: a base (100); a core (200) connected at the center of the base (100); a flange seat (300) comprising a cylindrical body (301) and an upper flange (302) and a lower flange (303) connected at both ends of the cylindrical body (301) respectively, the cylindrical body (301) is movably sleeved on the core (200) and can rotate around the center axis of the base (100), the upper flange (302) is used for detachable connection with the target steam turbine steam chamber (1000), and a ring groove (304) coaxial with the cylindrical body (301) is further formed on the upper flange (302), and the lower flange (303) is detachably connected with the base (100).

2. The steam turbine steam chamber machining tool according to claim 1, wherein: the steam turbine steam chamber machining tool further comprises a taper pin (400); a first connecting hole (101) for inserting the taper pin (400) is formed on the base (100), a plurality of second connecting holes (305) for inserting the taper pin (400) are formed on the lower flange (303), the second connecting holes (305) are arranged around the center axis of the base (100), the first connecting hole (101) and the second connecting hole (305) have a predetermined relative position relationship so that the second connecting hole (305) can be connected with the first connecting hole (101) during the rotation of the flange seat (300).

3. The steam turbine steam chamber machining tool according to claim 2, wherein: the second connecting hole (305) is arranged around the center axis of the base (100).

4. The steam turbine steam chamber machining tool according to claim 2, wherein: the first connecting hole (101) and the second connecting hole (305) are both taper holes with large ends facing the upper flange (302), and the taper pin (400) is a taper body matched with the first connecting hole (101) and the second connecting hole (305).

5. The steam turbine steam chamber machining tool according to claim 4, wherein: the taper pin (400) comprises a screw rod section (401) and a taper rod section (402) for extending into the first connecting hole (101) and the second connecting hole (305), and the steam turbine steam chamber machining tool further comprises a nut (500) and a sleeve (600); the nut (500) is threadedly connected with the screw rod section (401), and the sleeve (600) is arranged between the nut (500) and the lower flange (303) and forms a hole through which the taper pin (400) passes.

6. The steam turbine steam chamber machining tool according to claim 1, wherein: a circular table (102) is formed on one side of the base (100) close to the lower flange (303), the lower flange (303) abuts against the circular table (102), and the outer diameter of the circular table (102) is smaller than the outer diameter of the lower flange (303).

7. The tooling for machining a steam chest of a steam turbine as claimed in claim 1, wherein: the flange seat (300) further comprises a cover plate (306); the cover plate (306) is detachably connected to one end of the cylindrical body (301) near the upper flange (302) and cooperates with the cylindrical body (301) to form a cavity for accommodating the core (200).

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