Turbine shell machining equipment

Abstract

The utility model provides steam turbine shell machining equipment, and relates to the technical field of steam turbine machining. The equipment comprises a workbench; the supporting table is installed on the workbench, the two sides of the steam turbine shell are limited to the supporting table, and the to-be-machined face of the steam turbine shell faces the workbench; and the three-axis machining unit is installed on the workbench and corresponds to the to-be-machined face of the steam turbine shell. On the whole, the structure is more compact, the cost is low, the rigidity and the strength are high, and the machining efficiency is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine processing technology, and in particular to a steam turbine casing processing equipment. Background Technology

[0002] For large steam turbine casings and deep grooved parts, weighing approximately 50 to 150 tons, the traditional machining of these parts was done on large floor-type boring machines (model 200-250 boring machines) and large overhead milling machines, as well as moving beam and moving column gantry machining centers. The heavier the workpiece, the larger the blank allowance, sometimes 50mm-150mm on one side, making machining increasingly time-consuming. The traditional machining method involves placing the workpiece with the machining surface facing upwards, with the cutter head mounted on a right-angle milling head at the top of the machine tool's square slide rail. The extension of the square slide rail affects the size of the machine tool; the longer the extension, the lower the rigidity, the larger the machine tool model, and the higher the price (ranging from 2 million to 15 million), resulting in very high machining costs.

[0003] Therefore, there is an urgent need for a turbine casing processing equipment that is compact in structure, low in cost, and can effectively improve processing efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a turbine casing processing equipment that solves the problems of high cost and low processing efficiency in existing processing equipment. The various technical effects of the preferred technical solutions provided by this utility model are detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This utility model provides a turbine casing processing equipment, comprising:

[0007] Workbench;

[0008] A support platform is mounted on the worktable, and the two sides of the turbine casing are respectively limited on the support platform, with the surface of the turbine casing to be processed facing the worktable;

[0009] A three-axis machining unit is mounted on the worktable and is positioned corresponding to the surface to be machined on the turbine casing.

[0010] Preferred options also include:

[0011] A limiting groove is formed on the top surface of the support platform, and the two sides of the turbine casing are adapted to fit within the limiting groove;

[0012] A limiting part is installed on the support platform, and the turbine casing is vertically limited in the limiting groove by the limiting part.

[0013] Preferably, the limiting portion includes:

[0014] A chute is formed on the top of the support platform in a direction that is close to or away from the turbine casing;

[0015] The limiting block and the threaded component are provided. The limiting block is slidably connected in the groove, and the threaded component is installed on the support platform and is drivenly connected to the limiting block.

[0016] Preferably, the threaded component includes:

[0017] A screw, the first end of which is rotatably connected to the bottom of the slide groove and threadedly engaged with the bottom of the limiting block.

[0018] Preferably, the threaded component further includes:

[0019] A disc, which is coaxially and fixedly connected to the second end of the screw;

[0020] A fixing block is fixedly connected to the side wall of the support platform, and the second end of the screw passes through the fixing block.

[0021] Preferably, the three-axis machining unit includes:

[0022] A first slide, a second slide, and a third slide are provided. The first slide is slidably connected to a slide rail on the top surface of the worktable. The second slide is slidably connected to the first slide along the vertical direction of the slide rail. The third slide is slidably connected to the second slide vertically. The cutting tool is mounted on the third slide. The first slide, the second slide, and the third slide are driven by lead screws.

[0023] Preferably, the lead screw drive includes:

[0024] The worktable, the first slide, and the second slide are respectively equipped with the motor and rotatably connected to the motor. The motor and the motor are connected in a transmission connection. The first slide is threaded onto the threaded section of the motor on the worktable. The second slide is threaded onto the threaded section of the motor on the first slide. The third slide is threaded onto the threaded section of the motor on the second slide.

[0025] Preferably, the support platform is provided in several groups, and the several support platforms are respectively located on both sides of the bottom of the turbine casing and are detachably connected to the workbench.

[0026] In the technical solution provided by this utility model, the workpiece (i.e., the turbine casing) is placed on a support platform with the surface to be machined facing downwards. The turbine casing is machined by a three-axis machining unit. Overall, the structure of this application is more compact, less expensive, and possesses high rigidity and strength. With the turbine casing facing downwards and the three-axis machining unit facing upwards, the extension distance is shortened compared to traditional methods, thereby improving the rigidity of the equipment. The feed size is reduced, resulting in increased machining efficiency. The milling chips produced during downward machining naturally fall off, eliminating the need for special cleaning of residual milling chips inside the workpiece. Overall, this application has a compact structure, low cost, and effectively improves machining efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0029] Figure 2 This is a schematic cross-sectional view of the main view of this utility model.

[0030] In the diagram: 1. Workbench; 2. Slide rail; 3. First slide; 4. Second slide; 5. Third slide; 6. Steam turbine casing; 7. Support platform; 8. Limiting block; 9. Screw; 10. Limiting groove; 11. Disc; 12. Slide groove; 13. Fixing block. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] refer to Figure 1-2 A specific embodiment of this utility model provides a turbine casing processing equipment, comprising:

[0033] Workbench 1;

[0034] Support platform 7 is installed on workbench 1. The two sides of the turbine casing 6 are respectively limited on the support platform 7, and the surface of the turbine casing 6 to be processed is set facing the workbench 1.

[0035] The three-axis machining unit is installed on the worktable 1 and is set in accordance with the surface to be machined on the turbine casing 6.

[0036] For large steam turbine casings and deep grooved parts, weighing approximately 50 to 150 tons, the traditional machining of these parts was done on large floor-type boring machines (model 200-250 boring machines) and large overhead milling machines, as well as moving beam and moving column gantry machining centers. The heavier the workpiece, the larger the blank allowance, sometimes 50mm-150mm on one side, making machining increasingly time-consuming. The traditional machining method involves placing the workpiece with the machining surface facing upwards, with the cutter head mounted on a right-angle milling head at the top of the machine tool's square slide rail. The extension of the square slide rail affects the size of the machine tool; the longer the extension, the lower the rigidity, the larger the machine tool model, and the higher the price (ranging from 2 million to 15 million), resulting in very high machining costs. In this application, the workpiece (i.e., the turbine casing 6) is placed on the support platform 7 with the surface to be machined facing downwards. The turbine casing 6 is machined by a three-axis machining unit. Overall, this application has a more compact structure, lower cost, and high rigidity and strength. With the turbine casing 6 facing downwards and the three-axis machining unit facing upwards, the extension distance is shortened compared to traditional methods, thus improving the rigidity of the equipment. The feed size is reduced, resulting in increased machining efficiency. The milling chips from downward machining naturally fall off, eliminating the need for special cleaning of residual chips inside the workpiece. Overall, this application has a compact structure, low cost, and effectively improves machining efficiency.

[0037] Further optimizations to the plan include:

[0038] The limiting groove 10 is formed on the top surface of the support platform 7, and the two sides of the turbine casing 6 are adapted to fit into the limiting groove 10.

[0039] The limiting part is installed on the support platform 7, and the turbine casing 6 is vertically limited in the limiting groove 10 by the limiting part.

[0040] The turbine casing 6 is hoisted into the limiting groove 10, which effectively restricts the horizontal displacement of the turbine casing 6 and effectively restricts the vertical displacement of the turbine casing 6 through the limiting part, thereby ensuring the installation stability of the turbine casing 6 during the processing.

[0041] The design has been further optimized, and the limiting part includes:

[0042] The slide 12 is formed on the top of the support platform 7 in a direction that is close to or far from the turbine casing 6;

[0043] The limiting block 8 is slidably connected in the slide groove 12, and the threaded part is installed on the support platform 7 and is connected to the limiting block 8 in a transmission manner.

[0044] When the turbine casing 6 is hoisted into the limiting groove 10, the threaded part is manually driven to move the limiting block 8 into the sliding groove 12 and towards the arc-shaped surface of the turbine casing 6 (reference). Figure 2 The limiting block 8 moves closer to the turbine casing 6 until it is in close contact with the arc-shaped surface. The shape of the limiting block 8 matches the arc-shaped surface of the turbine casing 6, and they can fit together fully to ensure a stable limiting effect.

[0045] Further optimization of the solution, threaded components include:

[0046] The screw 9 has its first end rotatably connected to the bottom of the slide groove 12 and engaged with the bottom thread of the limit block 8.

[0047] The screw 9 is rotated manually or electrically (e.g., by an electric handheld device connected to the second end of the screw 9), thereby driving the limiting block 8 to slide within the slide groove 12; wherein, the portion of the screw 9 located within the support platform 7 is greater than the portion exposed within the slide groove 12, thereby preventing the screw 9 from detaching radially from the support platform 7.

[0048] Further optimization of the design includes the following threaded components:

[0049] Disk 11 is coaxially fixedly connected to the second end of screw 9;

[0050] The fixing block 13 is fixedly connected to the side wall of the support platform 7, and the second end of the screw 9 passes through the fixing block 13.

[0051] Manually rotating the disc 11 causes the screw 9 to rotate, thereby driving the limit block 8 to slide within the groove 12; the main function of the fixing block 13 is to improve the stability of the screw 9 during rotation.

[0052] The solution has been further optimized, and the three-axis machining unit includes:

[0053] The first slide 3, the second slide 4, and the third slide 5 are slidably connected to the slide rail 2 on the top surface of the worktable 1. The second slide 4 is slidably connected to the first slide 3 along the vertical direction of the slide rail 2. The third slide 5 is slidably connected to the second slide 4. The cutting tool is mounted on the third slide 5. The first slide 3, the second slide 4, and the third slide 5 are driven by lead screws.

[0054] Further optimization of the solution includes the following components for the lead screw drive:

[0055] The worktable 1, the first slide 3, and the second slide 4 are respectively equipped with motors and rotatably connected to lead screws. The motors and lead screws are connected by a drive. The first slide 3 is threaded onto the threaded section of the lead screw on the worktable 1. The second slide 4 is threaded onto the threaded section of the lead screw on the first slide 3. The third slide 5 is threaded onto the threaded section of the lead screw on the second slide 4.

[0056] The motor adopts a 47KW variable frequency servo motor and is matched with a 1:33 gear reducer, which makes the power output far exceed that of traditional machine tools by several times. When each motor is started, the corresponding worktable 1, first slide 3 or second slide 4 is moved through the lead screw, which ultimately drives the cutting tool to process the turbine shell 6.

[0057] Further optimization of the scheme: several sets of support platforms 7 are provided, and several support platforms 7 are located on both sides of the bottom of the turbine casing 6, and are detachably connected to the workbench 1.

[0058] Several support platforms 7 are located on both sides of the bottom of the turbine casing 6. The three-axis machining unit moves between the support platforms 7 on both sides and below the turbine casing 6. The horizontal displacement of the turbine casing 6 is restricted by the limiting grooves 10 on the top of the support platforms 7. The support platforms 7 are detachably connected to the worktable 1 by bolts. The distance between adjacent support platforms 7 can be adjusted according to the size of the workpiece so that the workpiece fits perfectly in the limiting grooves 10.

[0059] It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., used herein to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] In this description, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0061] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A steam turbine casing processing equipment, characterized in that, include: Workbench (1); A support platform (7) is installed on the workbench (1). The two sides of the turbine casing (6) are respectively limited on the support platform (7). The surface of the turbine casing (6) to be processed is set facing the workbench (1). A three-axis machining unit is installed on the worktable (1) and is set in relation to the surface to be machined on the turbine casing (6).

2. The turbine casing processing equipment according to claim 1, characterized in that, Also includes: Limiting groove (10), the limiting groove (10) is opened on the top surface of the support platform (7), and the two sides of the turbine casing (6) are adapted to the limiting groove (10); The limiting part is installed on the support platform (7), and the turbine casing (6) is vertically limited in the limiting groove (10) by the limiting part.

3. The turbine casing processing equipment according to claim 2, characterized in that, The limiting part includes: A chute (12) is formed on the top of the support platform (7) in a direction close to or away from the turbine casing (6); The limiting block (8) and the threaded component are slidably connected in the groove (12), and the threaded component is installed on the support platform (7) and is connected to the limiting block (8) in a transmission manner.

4. The turbine casing processing equipment according to claim 3, characterized in that, The threaded component includes: The screw (9) has its first end rotatably connected to the bottom of the slide (12) and threadedly engaged with the bottom of the limiting block (8).

5. The turbine casing processing equipment according to claim 4, characterized in that, The threaded component also includes: A disc (11) is coaxially fixedly connected to the second end of the screw (9); A fixing block (13) is fixedly connected to the side wall of the support platform (7), and the second end of the screw (9) passes through the fixing block (13).

6. The turbine casing processing equipment according to claim 1, characterized in that, The three-axis machining unit includes: The first slide (3), the second slide (4), and the third slide (5) are slidably connected to the slide rail (2) on the top surface of the worktable (1). The second slide (4) is slidably connected to the first slide (3) along the vertical direction of the slide rail (2). The third slide (5) is slidably connected to the second slide (4) vertically. The cutting tool is mounted on the third slide (5). The first slide (3), the second slide (4), and the third slide (5) are driven by lead screws.

7. The turbine casing processing equipment according to claim 6, characterized in that, The lead screw drive component includes: The motor is mounted on the worktable (1), the first slide (3), and the second slide (4), and the motor is rotatably connected to the motor. The motor and the motor are connected in a transmission. The first slide (3) is threaded onto the threaded section of the motor on the worktable (1). The second slide (4) is threaded onto the threaded section of the motor on the first slide (3). The third slide (5) is threaded onto the threaded section of the motor on the second slide (4).

8. The turbine casing processing equipment according to claim 1, characterized in that, The support platform (7) is provided in several groups, and the several support platforms (7) are respectively located on both sides of the bottom of the turbine casing (6) and are detachably connected to the workbench (1).

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