Machining device and method for giant guide vane shaft head of water turbine

Abstract

The machining method comprises the steps that a giant guide vane is fixed to a lifting table through an adjusting fixing frame, the axes of the shaft heads at the two ends of the giant guide vane penetrate through the center of the lifting table during fixing, and meanwhile it is guaranteed that the installation heights of the shaft heads at the two ends of the giant guide vane are the same; a cutter is installed on the machine head, and the lifting table and the rotary table are adjusted to be aligned to the machining coordinate system for calibration; a shaft head at one end of the giant guide vane is machined; after the shaft head at one end is machined, the position of the machine head is adjusted through the rotary table, and the shaft head at the other end is machined. The guide vane machining device has the beneficial effects that by arranging the lifting table, the rotary table and the adjusting fixing frame on the lifting table, the positions of the machining tool and the to-be-machined guide vane can be adjusted conveniently, the position of the tool can be moved through the rotary table, and the problems that the machining precision is reduced, and the working efficiency is low due to workpiece moving are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of turbine guide vane shaft head processing, and in particular relates to a processing device and a method for a giant turbine guide vane shaft head. Background Art

[0002] The turbine guide vane is an important part of the turbine in a hydroelectric power station. It is located near the water inlet of the turbine and its main function is to guide the water flow before entering the runner, ensuring that the water flow hits the runner blades in the most effective way, thereby improving the working efficiency of the turbine.

[0003] The turbine guide vane shaft head hole is mainly used to install the guide vane shaft, which is the key part connecting the guide vane and the operating mechanism (such as the hydraulic cylinder). The functions of the shaft head hole include:

[0004] 1. Fixing the guide vane: The shaft head hole allows the guide vane shaft to pass through, and the guide vane is fixed to the turbine housing through a fixing device to ensure that the guide vane can be firmly installed and maintained in the correct position.

[0005] 2. Transmitting motion: The guide vane shaft is connected to the external operating mechanism through the shaft head hole, so that when the operating mechanism (such as a hydraulic cylinder) is actuated, the rotation or linear motion can be transmitted to the guide vane through the guide vane shaft to adjust the guide vane opening.

[0006] 3. Sealing function: In order to prevent water leakage, a sealing device is usually installed around the shaft head hole to ensure that water does not seep out from the gap between the guide vane shaft and the hole.

[0007] 4. Support function: The shaft head hole and its surrounding structure provide necessary support for the guide vane shaft, ensuring that it remains stable during operation and is not affected by external forces to cause unnecessary displacement or vibration.

[0008] Therefore, the shaft head hole is one of the important structures to ensure the normal operation of the turbine guide vane, and plays an important role in maintaining the overall performance and efficiency of the turbine. Therefore, in the design, manufacturing and maintenance of the turbine, there are strict requirements on the quality and accuracy of the shaft head hole.

[0009] However, the guide vanes of large turbines are relatively large in size and mass. The current method for processing the shaft head holes is to complete the shaft head processing at one end of the guide vane, rotate the guide vane, and then process the shaft head at the other end. However, due to the large size and mass of the guide vane, the rotation of the guide vane and the adjustment process after rotation are relatively troublesome, and it is difficult to ensure the accuracy of the shaft head holes at both ends.

[0010] Therefore, we need to design a processing device and method for the giant guide vane shaft head of a turbine to solve these problems. Summary of the invention

[0011] The problem to be solved by the present invention is to provide a processing device and method for a giant guide vane shaft head of a water turbine.

[0012] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0013] A method for processing a giant guide vane shaft head of a water turbine comprises the following steps:

[0014] S1, fix the giant guide vane to the lifting platform by adjusting the fixing frame, so that the axes of the shaft heads at both ends of the giant guide vane pass through the center of the lifting platform, and ensure that the installation heights of the shaft heads at both ends of the giant guide vane are the same;

[0015] S2, install the tool on the machine head and calibrate the machining coordinate system by adjusting the lifting table and the rotary table;

[0016] S3, machining the shaft head at one end of the giant guide vane;

[0017] S4, after the processing of the shaft head at one end is completed, the position of the machine head is adjusted by the turntable to process the shaft head at the other end.

[0018] A processing device for a giant guide vane shaft head of a water turbine is characterized in that it includes a base, a control box, a lifting platform and a rotating table are arranged on the base, the lifting platform is located inside the rotating table, and a plurality of adjustment fixing frames are arranged on the lifting platform, a machine head is arranged on the rotating table, and the control box is used to control the lifting platform, the rotating table and the machine head.

[0019] Preferably, a rotating mechanism and a lifting mechanism are provided in the base, and both the rotating mechanism and the lifting mechanism are connected to the control box.

[0020] Preferably, the rotating mechanism includes a ring gear, a drive box, a rotating motor and an angle sensor, the ring gear is fixedly arranged on the turntable, the rotating motor and the angle sensor are both fixedly arranged on the base, and the input end of the angle sensor is opposite to the turntable, the driving gear is fixedly arranged at the output end of the rotating motor, and the driving gear is meshed with the ring gear.

[0021] Preferably, the lifting mechanism includes a hydraulic cylinder, a hydraulic pump and a displacement sensor, the hydraulic cylinder is fixedly arranged on the base below the lifting platform, and the output end is connected to the lifting platform, the displacement sensor is fixedly arranged on the lifting platform, and the output end is opposite to the base below the lifting platform, the hydraulic pump is fixedly arranged in the base, and the output end of the hydraulic pump is connected to the output end of the hydraulic cylinder.

[0022] The advantages and positive effects of the present invention are:

[0023] The present invention facilitates adjustment of the positions of the machining tool and the guide vane to be machined by providing a lifting platform, a rotating platform and an adjustment fixing frame on the lifting platform, and the tool position can be moved by utilizing the rotating platform, thereby avoiding problems such as reduced machining accuracy and low work efficiency caused by moving the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 is a flow chart of the processing method of the present invention;

[0026] Figure 2 It is a schematic diagram of the top view of the processing device of the present invention;

[0027] Figure 3 It is a schematic diagram of the internal structure of the processing device of the present invention.

[0028] The following are the descriptions of the reference numerals:

[0029] 1. Base; 2. Lifting platform; 3. Rotating table; 4. Machine head; 5. Control box; 6. Operation panel; 7. Adjustment bracket; 8. Giant guide vane; 9. Hydraulic cylinder; 10. Displacement sensor; 11. Ring gear; 12. Rotating motor; 13. Driving gear; 14. Hydraulic pump; 15. Angle sensor. DETAILED DESCRIPTION

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like 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. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0032] The present invention will be further described below in conjunction with the accompanying drawings:

[0033] like Figure 2-Figure 3 As shown, a processing device for a giant guide vane shaft head of a turbine comprises a base 1, characterized in that a control box 5, a lifting platform 2 and a rotating table 3 are arranged on the base 1, the lifting platform 2 is located in the rotating table 3, and a plurality of adjustment fixing frames 7 are arranged on the lifting platform 2, a machine head 4 is arranged on the rotating table 3, and the control box 5 is used to control the lifting platform 2, the rotating table 3 and the machine head 4.

[0034] A rotating mechanism and a lifting mechanism are arranged in the base 1 , and both the rotating mechanism and the lifting mechanism are connected to the control box 5 .

[0035] The rotating mechanism includes a ring gear 11, a drive box, a rotating motor 12 and an angle sensor 15. The ring gear 11 is fixedly arranged on the turntable 3. The rotating motor 12 and the angle sensor 15 are both fixedly arranged on the base 1, and the input end of the angle sensor 15 is opposite to the turntable 3. The angle sensor 15 can be used to monitor the rotation angle of the turntable 3 to ensure the accuracy between the turntable 3 and the other end shaft head after rotation. The driving gear 13 is fixedly arranged at the output end of the rotating motor 12, and the driving gear 13 is meshed with the ring gear 11.

[0036] The lifting mechanism includes a hydraulic cylinder 9, a hydraulic pump 14 and a displacement sensor 10. The hydraulic cylinder 9 is fixedly arranged on a base 1 below the lifting platform 2, and the output end is connected to the lifting platform 2. The displacement sensor 10 is fixedly arranged on the lifting platform 2, and can measure the moving distance of the lifting platform 2 to ensure the matching accuracy between the shaft head and the operating platform and the shaft head, and the output end is opposite to the base 1 adjacent to the lifting platform 2. The hydraulic pump 14 is fixedly arranged in the base 1, and the output end of the hydraulic pump 14 is connected to the output end of the hydraulic cylinder 9.

[0037] like Figure 1 As shown, the processing method of the 8-axis head of the giant guide vane of the turbine includes the following steps:

[0038] S1, fix the giant guide vane 8 to the lifting platform 2 by adjusting the fixing frame 7, so that the axes of the shaft heads at both ends of the giant guide vane 8 pass through the center of the lifting platform 2, and ensure that the installation heights of the shaft heads at both ends of the giant guide vane 8 are the same;

[0039] S2, installing a tool on the machine head 4, adjusting the lifting table 2 and the rotary table 3 and calibrating the processing coordinate system;

[0040] S3, processing the shaft head at one end of the giant guide vane 8;

[0041] S4, after the processing of the shaft head at one end is completed, the position of the machine head 4 is adjusted by the turntable 3 to process the shaft head at the other end.

[0042] The working process of this embodiment is as follows: the equipment needs to be initialized and adjusted before processing. In the initialization state, the top surface of the lifting platform 2 is flush with the top surface of the turntable 3, and the machine head 4 on the turntable 3 rotates to the side close to the control box 5.

[0043] During operation, the giant guide vane 8 is first hoisted onto the lifting platform 2, and then the position of the adjustment frame 7 on the lifting platform 2 is adjusted to fix the giant guide vane 8 to the lifting platform 2. When fixing, it is necessary to ensure that the axes of the shaft heads at both ends of the giant guide vane 8 pass through the center of the lifting platform 2, and it is also necessary to ensure that the axes of the two shaft heads on the giant guide vane 8 are parallel to the table surface of the lifting platform 2.

[0044] Then install an external cylindrical turning tool on the machine head 4, and then calibrate the technician coordinate system so that the axis of the shaft rod on the joint is in line with the axis of the shaft head. After starting the equipment, use the external cylindrical turning tool to process the shaft head and each step of the cylindrical surface at the end of the giant guide vane 8. After the outer circle and each step of the cylindrical surface of the shaft head at one end are processed, rotate the turntable 3 to process the outer circle and each step of the cylindrical surface of the shaft head at the other end of the giant guide vane 8.

[0045] After the outer circle and each step of cylindrical surfaces of the shaft head are processed, the turning tool on the machine head 4 is replaced with an internal boring tool, and the technician coordinate system is calibrated again to make the axis of the shaft rod on the joint and the axis of the shaft head collinear. After starting the equipment, the hole on the shaft head is processed with the internal boring tool. When the shaft head at one end of the giant guide vane 8 is processed, the turntable 3 is used to drive the machine head 4 to rotate and adjust the position of the machine head 4. When the turntable 3 drives the machine head 4 to rotate to the shaft head end at the other end of the giant guide vane 8 and aligns it with the axis of the shaft head, the shaft head is processed again, and the processing of the shaft heads at both ends is completed without moving the giant guide vane 8.

[0046] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for processing a giant guide vane shaft head of a water turbine, characterized in that: The following steps are involved: S1, using the adjustment fixing frame (7) to fix the giant guide vane (8) to the lifting platform (2), when fixing, the axis of the shaft heads at both ends of the giant guide vane (8) passes through the center of the lifting platform (2), and at the same time, ensure that the installation heights of the shaft heads at both ends of the giant guide vane (8) are the same; S2, installing a tool on the machine head (4), and calibrating the machining coordinate system by adjusting the lifting platform (2) and the rotary table (3); S3, processing the shaft head at one end of the giant guide vane (8); S4, when the processing of the shaft head at one end is completed, the position of the machine head (4) is adjusted by the rotary table (3) to process the shaft head at the other end.

2. A processing device for a giant guide vane shaft head of a water turbine, characterized in that: The invention comprises a base (1), characterized in that a control box (5), a lifting platform (2) and a rotating table (3) are arranged on the base (1), the lifting platform (2) is located inside the rotating table (3), a plurality of adjustment fixing frames (7) are arranged on the lifting platform (2), a machine head (4) is arranged on the rotating table (3), and the control box (5) is used to control the lifting platform (2), the rotating table (3) and the machine head (4).

3. The processing device for giant guide vane shaft head of a water turbine according to claim 2 is characterized in that: A rotating mechanism and a lifting mechanism are arranged in the base (1), and both the rotating mechanism and the lifting mechanism are connected to the control box (5).

4. The processing device for giant guide vane shaft head of a water turbine according to claim 3 is characterized in that: The rotating mechanism comprises a ring gear (11), a drive box, a rotating motor (12) and an angle sensor (15); the ring gear (11) is fixedly arranged on the turntable (3); the rotating motor (12) and the angle sensor (15) are both fixedly arranged on the base (1), and the input end of the angle sensor (15) is opposite to the turntable (3); the driving gear (13) is fixedly arranged on the output end of the rotating motor (12), and the driving gear (13) is meshed with the ring gear (11).

5. The processing device for giant guide vane shaft head of a water turbine according to claim 3 is characterized in that: The lifting mechanism comprises a hydraulic cylinder (9), a hydraulic pump (14) and a displacement sensor (10); the hydraulic cylinder (9) is fixedly arranged on the base (1) below the lifting platform (2), and an output end thereof is connected to the lifting platform (2); the displacement sensor (10) is fixedly arranged on the lifting platform (2), and an output end thereof is opposite to the base (1) below the lifting platform (2); the hydraulic pump (14) is fixedly arranged in the base (1), and an output end of the hydraulic pump (14) is connected to an output end of the hydraulic cylinder (9).

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