Special centering device for 600MW feed pump turbine

Abstract

The invention discloses a special centering device for a 600MW feed pump turbine. At present, a magnetic gauge stand is used for centering, the strength of a gauge rod is not enough, the gauge rod shakes seriously when a rotor is coiled, and inaccurate measurement data is easily caused. A magnetic gauge stand is not enough in suction force, the gauge stand is easy to shift when a rotor is rotated, and inaccurate measurement data is easy to cause. The device comprises a door-shaped frame and an L-shaped frame, the door-shaped frame and the L-shaped frame are welded to form a supporting frame, round holes are formed in the two ends of the door bottom of the door-shaped frame respectively, end face meters are inserted into the round holes, through holes are formed in the ends of the L-shaped frame, and circumferential meters are inserted into the through holes; and the support frame is fixed with the water feeding pump core wrapping shaft through a bolt. The method is used for centering the steam turbine feed pump.

Description

Technical Field

[0001] The invention relates to a special device for centering a 600MW feedwater pump steam turbine. Background Art

[0002] The center of the steam turbine feed pump is currently found by using a magnetic meter stand. The meter stem is not strong enough, and the meter stem shakes greatly when the rotor is turned, which can easily cause inaccurate measurement data. The magnetic meter stand has insufficient suction, and the meter stand is easy to shift when the rotor is turned, which can easily cause inaccurate measurement data. The magnetic meter stand takes up a lot of space, and it is easy to cause accidental contact when the rotor is turned, resulting in inaccurate measurement data. Summary of the invention

[0003] The purpose of the present invention is to provide a special device for centering a 600MW feedwater pump turbine, which solves the problems raised in the above-mentioned background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A 600MW feedwater pump turbine centering device, comprising a portal frame and an L-frame, wherein the portal frame and the L-frame are welded to form a support frame, circular holes are respectively provided at both ends of the door bottom of the portal frame, and end face gauges are inserted into the circular holes, and through holes are provided at the ends of the L-frame, and circumferential gauges are inserted into the through holes; The support frame is fixed to the water pump core shaft by bolts.

[0005] The special device for centering a 600MW feedwater pump turbine is provided with ribs fixed on the portal frame.

[0006] The special device for centering a 600MW feedwater pump turbine, the end face table and the circumferential table are both fixed by locking screws.

[0007] The special device for centering a 600MW feedwater pump turbine is characterized in that two support rings are fixed on the portal frame, and each of the support rings is threadedly connected with a lifting ring. Beneficial Effects

[0008] 1. The present invention is a convenient and accurate centering tool. The special tool is designed to be lightweight, easy to carry and transport on site, and improves work efficiency. When measuring, the opening and circumference are integrated, the meter is easy to read, and the data will not be wrong. Ensure the accuracy of the measurement results and eliminate the error caused by human accidental contact when the magnetic meter seat is rotating the rotor. Successfully achieve accurate positioning of the turbine center, greatly improving the operating efficiency and stability of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a front view of the present invention; Figure 2A top view of the present invention; In the figure: 1. Feed pump core shaft; 2. Lifting ring; 3. Door frame; 4. L-shaped frame; 5. End face table; 6. Turbine shaft; 7. Circumferential table; 8. Support ring; 9. Rib plate; 10. Locking screw. DETAILED DESCRIPTION

[0010] Reference Figure 1-Figure 2 A 600MW feedwater pump turbine centering device, comprising a portal frame 3 and an L-frame 4, wherein the portal frame and the L-frame are welded to form a support frame, and circular holes are respectively provided at both ends of the door bottom of the portal frame, and end surface gauges 5 are inserted into the circular holes, and through holes are provided at the ends of the L-frame, and circumferential gauges 7 are inserted into the through holes; The support frame is fixed to the water pump core shaft 1 by bolts.

[0011] Ribs 9 are fixed on the portal frame.

[0012] The end surface gauge and the circumferential surface gauge are both fixed by locking screws 10.

[0013] Two support rings 8 are fixed on the portal frame, and a lifting ring 2 is threadedly connected to each of the support rings.

[0014] Working principle: when finding the center, two M12 lifting rings are used to fix it. The opening and the circumference frame are fixed with locking screws. The opening frames on both sides correspond horizontally to ensure that the measurement center data is true and accurate. It is easy to make and reduce construction costs. After application, the safety of the unit is improved, the risk of failure caused by misalignment of the center is reduced, and a strong guarantee is provided for the long-term stable operation of the unit.

[0015] According to the relative position of the turbine axis and the feed pump axis, the installation position of the special tool is determined, and 3 dial indicators are placed on the special tool. At the same time, the circumference and opening gauge readings are adjusted to 5.0, and then the disc rotor records the circumference and opening data changes and calculates the center, thereby achieving the purpose of precise positioning of the turbine center and effectively avoiding the risk of failure caused by misalignment of the center. This centering bracket is simple to use and easy to operate. By using this tool, the centering time is shortened from more than 5 hours to more than 1 hour, which significantly improves work efficiency.

Claims

1. A 600MW feedwater pump turbine centering device, characterized by: The structure includes a door frame and an L-shaped frame. The door frame and the L-shaped frame are welded to form a support frame. The door bottom of the door frame is provided with round holes at both ends, and the end surface gauge is inserted into the round holes. The end of the L-shaped frame is provided with a through hole, and the circumferential gauge is inserted into the through hole. The support frame is fixed to the water pump core shaft by bolts.

2. A 600MW feedwater pump turbine centering device according to claim 1, characterized in that: Ribs are fixed on the portal frame.

3. A 600MW feedwater pump turbine centering device according to claim 2, characterized in that: The end surface table and the circumferential table are both fixed by locking screws.

4. A 600MW feedwater pump turbine centering device according to claim 3, characterized in that: Two support rings are fixed on the portal frame, and each of the support rings is threadedly connected with a lifting ring.

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