Centering device for water feeding pump of steam turbine

Abstract

Provided is a steam turbine feed pump centering device. 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 U-shaped pipe (1) and an L-shaped pipe (11), the U-shaped pipe and the L-shaped pipe are welded to form a supporting frame, sliding sleeves (2) are connected to the U-shaped pipe and the L-shaped pipe respectively in a sliding mode, the sliding sleeves are connected and fixed through a connecting plate (12), top stretching rods (13) are fixed to the two sliding sleeves on the U-shaped pipe respectively, and the top stretching rods (13) are connected with the connecting plate (12) in a sliding mode. A bottom extension rod (7) is fixed on the sliding sleeve on the L-shaped pipe, the top extension rod is connected with an end face dial indicator (14), and the bottom extension rod is connected with an adjustable circumferential dial indicator. The centering device is used for centering the steam turbine feed pump.

Description

Technical Field

[0001] The utility model relates to a centering device for a steam turbine feed water pump. 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. Utility Model Content

[0003] The utility model aims to provide a centering device for a steam turbine feed water pump, which solves the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0005] A turbine feed pump centering device comprises a U-shaped tube and an L-shaped tube. The U-shaped tube and the L-shaped tube are welded to form a support frame. The U-shaped tube and the L-shaped tube are respectively slidably connected with sliding sleeves, and the sliding sleeves are connected and fixed by connecting plates. Top extension rods are respectively fixed to the two sliding sleeves on the U-shaped tube, and a bottom extension rod is fixed to the sliding sleeve on the L-shaped tube. The top extension rod is connected to an end face dial indicator, and the bottom extension rod is connected to an adjustable circumferential dial indicator.

[0006] The device for centering a steam turbine feed water pump comprises a threaded sleeve fixed on the connecting plate, the threaded sleeve is sleeved on the screw rod and is threadedly connected with the screw rod, and the two ends of the screw rod are respectively connected with the fixing plate through bearings.

[0007] The invention discloses a centering device for a steam turbine feed pump, wherein the adjustable circumferential dial indicator comprises a circumferential dial indicator and an adjusting sleeve, wherein the circumferential dial indicator is inserted into the adjusting sleeve and fixed by fastening bolts, and the adjusting sleeve is threadedly connected to the adjusting screw hole on the bottom extension rod.

[0008] The centering device for a steam turbine feed water pump has fixing holes respectively provided on the U-shaped tube and the L-shaped tube. Beneficial Effects

[0009] 1. The utility model fixes the device to the small machine side coupling by bolts, and the small machine side coupling can be rotated by the turning device at the small machine side coupling. The rotation of the small machine side coupling will drive the device to rotate. The outer circle and opening deviation of the pump can be measured conveniently and accurately by the circumferential dial indicator and the end face dial indicator, so as to obtain the center value data of the steam-driven water supply pump.

[0010] 2. The utility model is provided with a sliding sleeve, a top extension rod and a bottom extension rod, and the position of the sliding sleeve can be adjusted according to the distance between the shaft end of the feed water pump and the shaft end of the turbine, so as to facilitate adjustment according to the distance between the small machine side coupling and the external pump side coupling.

[0011] 3. The utility model provides an adjustable circumferential dial indicator, so that the position of the circumferential dial indicator can be adjusted so that it can contact the outer cylindrical surface of the external pump side coupling. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the front view of the utility model;

[0013] Figure 2 It is a top view of the utility model;

[0014] Figure 3 It is a left view of the utility model;

[0015] Figure 4 It is a right view of the utility model;

[0016] Figure 5 for Figure 1 AA section view;

[0017] Figure 6 for Figure 1 A magnified view of part B;

[0018] Figure 7 is a schematic diagram of the structure of the sliding sleeve;

[0019] Figure 8 This is the front view of the utility model when in use;

[0020] Fig. 9 A top view of the utility model when in use;

[0021] In the figure: 1. U-shaped tube; 2. Sliding sleeve; 3. Screw rod; 4. Notch; 5. Fixed plate; 6. Handwheel; 7. Bottom extension rod; 8. Circumferential dial indicator; 9. Adjusting sleeve; 10. Fastening bolt; 11. L-shaped tube; 12. Connecting plate; 13. Top extension rod; 14. End dial indicator; 15. Locking bolt; 16. External pump side coupling; 17. Small machine side coupling; 18. Fixed hole; 19. Screw sleeve; 20. Adjusting screw hole; 21. U-shaped hole. DETAILED DESCRIPTION

[0022] Reference Figure 1-Figure 7, a turbine feed pump centering device, comprising a U-shaped tube 1 and an L-shaped tube 11, wherein the U-shaped tube and the L-shaped tube are welded to form a support frame, and notches 4 are respectively provided at the front and rear ends of the U-shaped tube and the L-shaped tube, and sliding sleeves 2 are respectively slidably connected to the U-shaped tube and the L-shaped tube, and the sliding sleeves are square blocks, and two symmetrically arranged U-shaped holes 21 are provided thereon, and the sliding sleeves are connected and fixed by connecting plates 12, and top extension rods 13 are respectively fixed to the two sliding sleeves on the U-shaped tube, and a bottom extension rod 7 is fixed to the sliding sleeve on the L-shaped tube, and the top extension rod and the bottom extension rod are both rod bodies with square cross-sections, and the top extension rod is L-shaped as a whole, and the bottom extension rod is straight-lined as a whole, and an end face dial indicator 14 is connected to the top extension rod, and a locking bolt is threadedly connected to the position where each end face dial indicator on the top extension rod is inserted, and the end face dial indicator is fixed by the locking bolt, and an adjustable circumferential dial indicator is connected to the bottom extension rod.

[0023] A screw sleeve 19 is fixed on the connecting plate, and the screw sleeve is sleeved on the screw rod 3 and is threadedly connected with the screw rod. The two ends of the screw rod are respectively connected to the fixed plate 5 through bearings.

[0024] The adjustable circumferential dial indicator includes a circumferential dial indicator 8 and an adjusting sleeve 9. The circumferential dial indicator is inserted into the adjusting sleeve and fixed by a fastening bolt 10. The fastening bolt is threadedly connected to the side of the adjusting sleeve. The end of the fastening bolt is pressed against the surface of the rod of the circumferential dial indicator to fix the position of the circumferential dial indicator. The adjusting sleeve is threadedly connected to the adjusting screw hole 20 on the bottom extension rod.

[0025] The U-shaped tube and the L-shaped tube are respectively provided with fixing holes 18 .

[0026] Working principle: When using, refer to Figure 8-Figure 9 , the three fixing holes on the support frame correspond to the threaded holes of the small machine side coupling 17 respectively, and then fix it with the small machine side coupling by bolts. A handwheel 6 is fixed to the end of the screw rod. Turning the handwheel drives the screw rod to rotate, and the screw rod is threadedly connected to the threaded sleeve, so that the sleeve slides, and the sliding drives the top extension rod and the bottom extension rod to move together until the end of the end dial indicator contacts the end face of the external pump side coupling 16. At this time, turn the adjusting sleeve, and the adjusting sleeve is threadedly connected to the adjusting screw hole of the bottom extension rod to adjust the position of the circumferential dial indicator until the end of the circumferential dial indicator contacts the circumferential surface of the external pump side coupling. The small machine side coupling can be rotated by the turning device at the small machine side coupling, and the rotation of the small machine side coupling will drive the device to rotate. The outer circle and opening deviation of the pump can be conveniently and accurately measured by the circumferential dial indicator and the end dial indicator, and then the center value data of the steam-driven water supply pump can be obtained.

Claims

1. A steam turbine feed pump centering device, characterized in that: Its composition includes a U-shaped tube and an L-shaped tube. The U-shaped tube and the L-shaped tube are welded to form a support frame. The U-shaped tube and the L-shaped tube are respectively slidably connected with sliding sleeves, and the sliding sleeves are connected and fixed by connecting plates. The two sliding sleeves on the U-shaped tube are respectively fixed with top extension rods, and the sliding sleeve on the L-shaped tube is fixed with a bottom extension rod. The top extension rod is connected with an end face dial indicator, and the bottom extension rod is connected with an adjustable circumferential dial indicator.

2. A steam turbine feedwater pump centering device according to claim 1, characterized in that: A screw sleeve is fixed on the connecting plate, the screw sleeve is sleeved on the screw rod and is threadedly connected with the screw rod, and two ends of the screw rod are respectively connected with the fixing plate through bearings.

3. A steam turbine feedwater pump centering device according to claim 2, characterized in that: The adjustable circumferential dial indicator comprises a circumferential dial indicator and an adjusting sleeve. The circumferential dial indicator is inserted into the adjusting sleeve and fixed by a fastening bolt. The adjusting sleeve is threadedly connected with the adjusting screw hole on the bottom extension rod.

4. A steam turbine feedwater pump centering device according to claim 3, characterized in that: The U-shaped tube and the L-shaped tube are respectively provided with fixing holes.

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