CN2778491Y

CN2778491Y - Device for marking pitch circle line of pin hole on last stage impeller of steam turbine rotor

Info

Publication number: CN2778491Y
Application number: CN 200520041339
Authority: CN
Inventors: 许雄国; 周月香
Original assignee: SHANGHAI STEAM TURBINE CO Ltd
Current assignee: Shanghai Electric Power Generation Equipment Co Ltd
Priority date: 2005-05-08
Filing date: 2005-05-08
Publication date: 2006-05-10
Anticipated expiration: 2015-05-08

Abstract

The utility model relates to a scribing device for pitching a circle of a final blade pin hole of a steam turbine rotor impeller and comprises a support frame, a sliding block, a scale, a scriber and a screw, wherein the support frame has two support feet. The rear part of a support frame body is provided with a concave through groove, the front part is provided with a long convex strip and a long strip sliding block is positioned in the concave through groove of the support frame body. The upper and the lower ends of the sliding block are provided with convex blocks, and a waist-shaped through hole is arranged in a long strip-shaped scale. The waist-shaped through hole is matched with the convex strip at the front part of the support frame body, the convex blocks at two ends of the sliding block are in contact with the surface of the scale and the lower part of the scale is provided with the scriber. One side of the support frame body is provided with a screw hole, a holding screw penetrates the screw hole and supports the sliding block and positioning screw holes are arranged at the front part of the support frame body and on the convex blocks at the upper and the lower ends of the sliding block. A positioning screw penetrates the waist-shaped through hole of the scale, and the scale is fixed on the support frame and the sliding block. The utility model overcomes the defect of the prior art, can discretionally adjust different radius values and height values and satisfies the scribing requirement of pitching the circle of the final blade pin hole of the steam turbine rotor impeller.

Description

Turbine rotor impeller pin-and-hole in last years of a century pitch circle chalker

(1) technical field

The utility model relates to turbine rotor impeller pin-and-hole in last years of a century pitch circle chalker.

(2) background technology

Existing turbine rotor impeller pin-and-hole in last years of a century pitch circle chalker is made up of support and scriber, the arc surface of support is abutted against on the cylindrical of turbine rotor impeller, traversing carriage, by scriber with last years of a century pin-and-hole the pitch circle line draw on the impeller wheel face.Because the diversity of turbine rotor impeller outer circular diameter, and different pin-and-hole radial positions in last years of a century, the support that therefore needs to be equipped with different radii value and height value meets the demands, and causes preparing a large amount of tooling devices.

(3) summary of the invention

The purpose of this utility model is to provide a kind of turbine rotor impeller pin-and-hole in last years of a century pitch circle chalker, this chalker has overcome the defective of prior art, can regulate different radius values and height value arbitrarily, satisfy the line requirement of turbine rotor impeller pin-and-hole in last years of a century pitch circle.

The utility model is achieved in that a kind of turbine rotor impeller pin-and-hole in last years of a century pitch circle chalker, it is characterized in that comprising support, slide block, scale, scriber, screw, support is that herringbone has two legs, the rack body rear portion has concave through grooves, the front portion is microscler raised line, the built-in rectangular slide block of rack body concave through grooves, there is projection at the two ends up and down of slide block, scale is to have waist through hole in the strip, waist through hole matches with the anterior raised line of rack body, the projection at slide block two ends contacts with the scale surface, scriber is equipped with in the scale bottom, has screw in rack body one side, and holding screw passes the rack body screw and withstands slide block, in the rack body front portion, slide block has positioning screw hole on the projection of two ends up and down, and dog screw passes the scale waist through hole scale is fixed on support and the slide block.

Above-mentioned turbine rotor impeller pin-and-hole in last years of a century pitch circle chalker, there is scale on the surface of described scale, and is zero point with the scriber.

The utility model be by two legs on the support and be loaded on the support slide block 3 locate impeller radius, slide block can be done being free to slide radially on support, and by holding screw slide block is positioned on the support.Scale can be done being free to slide radially on support and slide block, be used for determining the radial distance of impeller of rotor cylindrical to the pin-and-hole center, and can scale be tightened up by dog screw and be positioned on support and the slide block, scriber is housed on the scale, the pitch circle line at pin-and-hole center is drawn on the impeller wheel face of turbine rotor by scriber.The utility model has overcome the defective of prior art, the mobility on support by slide block and scale, can regulate different radius values and height value arbitrarily, satisfy the variation of turbine rotor impeller outer circular diameter and pin-and-hole center radial dimension, satisfy the line requirement of turbine rotor impeller pin-and-hole in last years of a century pitch circle, the utility model versatility is wide, and low cost of manufacture is simple to operate.

(4) description of drawings

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Fig. 1 is the utility model turbine rotor impeller pin-and-hole in last years of a century pitch circle chalker structural representation;

Fig. 2 be among Fig. 1 A-A to cross-sectional schematic;

Fig. 3 is turbine rotor impeller pin-and-hole in a last years of a century position view.

Among the figure: 1 scale, 2 slide blocks, 3 supports, 4 holding screws, 5 scribers, 6 dog screws, 7 nuts, 8 impellers, 9 last years of a century pin-and-hole, R impeller outer circular diameter, h pin-and-hole radial dimension, L1 pin-and-hole center RADIAL, L2 pin-and-hole center pitch circle line, x, y point is the contact point of support two legs and impeller of rotor periphery, and the z point is the contact point of slide block and impeller of rotor periphery.

(5) specific embodiment

Referring to Fig. 1, Fig. 2, a kind of turbine rotor impeller pin-and-hole in last years of a century pitch circle chalker comprises support 3, slide block 2, scale 1, scriber 5, holding screw 4 and dog screw 6.Support 3 has two legs for herringbone, and support 3 rear body have concave through grooves, and the front portion is microscler raised line.The built-in rectangular slide block 2 of support 3 body concave through grooves, there is projection at the two ends up and down of slide block 2, for alleviating the weight of slide block 2, cut out a waist through hole at the middle part of slide block 2, have screw in support 3 bodies one side, holding screw 4 passes support 3 body screws and withstands slide block 2, and slide block 2 and support 3 is fastening.Scale 1 has waist through hole in the strip, waist through hole matches with support 3 body portion raised lines, and the projection at slide block 2 two ends contacts with scale 1 surface, and scriber 5 fixedly is equipped with through nut 7 in scale 1 bottom, there is scale on the surface of scale 1, and is zero point with scriber 5.Have positioning screw hole on the projection of two ends at support 3 body portion, slide block about in the of 2, dog screw 6 passes scale 1 waist through hole scale 1 is fixed on support 3 and the slide block 2.

Referring to Fig. 3, Fig. 1, Fig. 2,, need to determine the accurate position of pin-and-hole center in last years of a century on impeller of rotor 8 wheel faces this pin-and-hole 9 that can drill and ream for turbine rotor impeller blade assembling with " latch structure in last years of a century ".The utility model turbine rotor impeller pin-and-hole in last years of a century pitch circle chalker is exactly to be used for marking accurately the pitch circle line at these pin-and-hole 9 centers.Two legs with this appliance stand 3 during operation lean against on the periphery of turbine rotor impeller 8, contact point is x, a y point, adjusts the radial position of slide block 2, makes its end also tightly be close to the periphery of impeller 8, contact point is the z point, tightens up the holding screw 4 between slide block 2 and the support 3.Like this, 3 x, y, z that this device contacts with impeller 8 peripheries have constituted impeller outer circular diameter R, and slide block 2 radially moving freely on support 3 makes the diameter value of x, y, 3 formations of z have diversity, thereby satisfies the multiple variation of turbine rotor impeller 8 outside diameters.Pin-and-hole 9 radial dimension value h according to designing requirement, moving radially scale 1 makes the scale on the scale 1 accurately align with slide block 2 ends, because scale 1 is the position at zero point with scriber 5, therefore the scale value of visible part is the pin-and-hole radial dimension value h of designing requirement on the scale 1, tightens up each dog screw 6 between scale 1 and support 3, the slide block 2.Scale 1 radially moving freely on support 3 and slide block 2 makes scriber 5 radial dimensions be rich in diversity, thereby satisfies the diversity requirement of turbine rotor impeller pin-and-hole in last years of a century 9 radial position sizes.After tightening each dog screw 6, just can be along impeller 8 periphery traversing carriages 3, thus mark pin-and-hole center pitch circle line L2 with scriber 5.

Claims

1. turbine rotor impeller pin-and-hole in last years of a century pitch circle chalker, it is characterized in that comprising support, slide block, scale, scriber, screw, support is that herringbone has two legs, the rack body rear portion has concave through grooves, the front portion is microscler raised line, the built-in rectangular slide block of rack body concave through grooves, there is projection at the two ends up and down of slide block, scale is to have waist through hole in the strip, waist through hole matches with the anterior raised line of rack body, the projection at slide block two ends contacts with the scale surface, scriber is equipped with in the scale bottom, has screw in rack body one side, and holding screw passes the rack body screw and withstands slide block, in the rack body front portion, slide block has positioning screw hole on the projection of two ends up and down, and dog screw passes the scale waist through hole scale is fixed on support and the slide block.

2. turbine rotor impeller pin-and-hole in last years of a century pitch circle chalker according to claim 1 is characterized in that there is scale on the surface of scale, and is zero point with the scriber.