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Transition bushing for processing final race of turbine rotor with 130T boring machine

A technology for steam turbine rotors and transition sleeves, which is applied to metal processing equipment, manufacturing tools, milling machine equipment, etc., can solve the problems of movement rigidity and insufficient machine tool spindle, and achieve the effect of meeting processing requirements, preventing movement, and improving rigidity

Active Publication Date: 2013-03-27
HARBIN TURBINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of movement and insufficient rigidity of the main shaft of the machine tool when the 130T boring machine processes the final wheel groove of the steam turbine rotor, the present invention provides a transition sleeve for processing the final wheel groove of the steam turbine rotor by the 130T boring machine

Method used

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  • Transition bushing for processing final race of turbine rotor with 130T boring machine
  • Transition bushing for processing final race of turbine rotor with 130T boring machine
  • Transition bushing for processing final race of turbine rotor with 130T boring machine

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specific Embodiment approach 1

[0008] Specific implementation mode one: combine Figure 1-Figure 4 Explain that the 130T boring machine of this embodiment is used to process the transition sleeve for the final wheel groove of the steam turbine rotor. The shape of the transition sleeve is composed of a frustum of a cone 10 and a cylinder 11. The large-diameter end face of the truncated cone 10 is integrated with one side end face of the cylinder 11, and the transition sleeve is provided with a through central inner hole 12 in the axial direction, and the periphery of the other side end face of the cylinder 11 is provided with a There is a ring-shaped protrusion 3 (the ring-shaped protrusion 3 is used as a notch to coordinate with the outer wall of the boring machine spindle), and the end face of the ring-shaped protrusion 3 is processed with a positioning key slot 2, and the positioning key slot 2. Open along the radial direction of the cylinder 11 (the positioning key slot 2 is matched with the positioning ...

specific Embodiment approach 2

[0009] Specific implementation mode two: combination Figure 2-Figure 4 Explain, on the outer wall of the frustum 10 of the present embodiment, four notches 7 are processed near the large-diameter end face of the frustum 10, and the four notches 7 are set in one-to-one correspondence with the four through holes 1 (to ensure that the transition sleeve The four bolts that are fixedly connected with the boring machine square box have reserved space). Others are the same as in the first embodiment.

[0010] When processing the final wheel groove of the steam turbine rotor, the transition sleeve of the present invention is set on the main shaft of the 130T boring machine, and fixed by the positioning key, and at the same time, the transition sleeve is fastened to the square box of the boring machine and the flange of the wheel groove milling cutter sleeve , when processing the last wheel groove of the steam turbine rotor, it can prevent the main shaft of the boring machine from mo...

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Abstract

The invention discloses a transition bushing for processing a final race of a turbine rotor with a 130T boring machine, relating to a component for processing a race of a turbine rotor with a boring machine. The invention aims to solve the problems of movement and insufficient rigidity of a boring machine spindle caused when the 130T boring machine processes the final race of the turbine rotor. The shape of the transition bushing consists of a round table body and a cylinder; the transition bushing is axially provided with a through center inner hole; round protuberances are arranged around the end surface of the cylinder; a positioning key through groove is processed on the end surface of the round protuberances; four through holes are axially processed on the end surface of the cylinder; the center inner hole of the transition bushing is located on one side of the small-diameter end surface of the round table body and is a conical center inner hole; two 180-degree symmetrical pin holes and two 180-degree symmetrical screw holes are processed on the small-diameter end surface of the round table body; and each pin hole is located between the two 180-degree symmetrical screw holes. Through the invention, the movement of the boring machine spindle can be prevented, and the rigidity of the boring machine spindle is improved. The transition bushing disclosed by the invention is used for processing the final race of the turbine rotor with the 130T boring machine.

Description

technical field [0001] The invention relates to a component used for machining steam turbine rotor grooves by a boring machine. Background technique [0002] The ultra-supercritical low-pressure rotor processes the final wheel groove on a 130T boring machine. During the processing, it is found that the wheel groove milling cutter is often damaged by cutting. Each milling cutter only processes 3-4 final wheel grooves before being scrapped. It is a serious quality problem to make the wheel groove stabbed. There are 128 wheel grooves in the forward and reverse directions of the final stage. The milling cutter is an imported tool with a small quantity and a high price (the unit price is nearly 30,000 yuan). If the damage is too much, it will cause a large economic loss, and at the same time affect the processing quality and progress of the rotor. To analyze the reasons why wheel groove milling cutters are often damaged, there are two points as follows: [0003] One is that th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23C5/26B23C3/28
Inventor 梁伟谭宗立骆杨杨东波孙智勇阎文松王龙梅张长洪王德泽王凤杰雷阳张广东
Owner HARBIN TURBINE