CN102350534A

CN102350534A - Transition bushing for processing final race of turbine rotor with 130T boring machine

Info

Publication number: CN102350534A
Application number: CN2011102819644A
Authority: CN
Inventors: 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
Original assignee: Harbin Turbine Co Ltd
Current assignee: Harbin Turbine Co Ltd
Priority date: 2011-09-21
Filing date: 2011-09-21
Publication date: 2012-02-15
Anticipated expiration: 2031-09-21
Also published as: CN102350534B

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

130T boring machine processing vapor turbine wheel final stage race spacer shell

Technical field

The present invention relates to the parts that a kind of boring machine processing turbo rotor groove is used.

Background technology

The ultra supercritical low pressure rotor is processed the final stage race on the 130T boring machine, find damages of often forging a knife of wheel slotting cutter in the process, and every milling cutter is only processed 3-4 final stage race and just scrapped, and is prone to make the race knife owing to forging a knife, and this is serious quality problems.The final stage race is forward and reverse to have 128 races, and this milling cutter is the import cutter, and quantity is few, price is high (nearly 30,000 yuan of unit price).As damage too much and will cause bigger economic loss, influence the crudy and the progress of rotor simultaneously.Analyze the frequent impaired reason of wheel slotting cutter, following 2 points arranged:

The one, in the process machine tool chief axis vibration bigger, main cause is this construction rotor final stage wheel groove width and dark, 130 boring spindle rigidity are not enough in the processing, promptly have " high load with small power phenomenon "; The 2nd, cutting force sudden change when the about 0.3mm of machine tool chief axis axial float, this play can make processing rotor final stage race.

Summary of the invention

The present invention is when solving 130T boring machine processing vapor turbine wheel final stage race, and the problem that machine tool chief axis play and rigidity are not enough provides a kind of 130T boring machine processing vapor turbine wheel final stage race spacer shell.

The present invention addresses the above problem the technical scheme of taking to be: 130T boring machine processing vapor turbine wheel final stage race spacer shell of the present invention; The profile of said spacer shell is made up of Rotary-table and cylinder; Said Rotary-table and the coaxial setting of cylinder; And the major diameter end face of this Rotary-table is made one with this cylindrical side end face; Said spacer shell is provided with the central bore of perforation vertically; The perimeter of said cylindrical opposite side end face is provided with the annular projection; The end of said annular projection is processed with the positioning key groove; Said positioning key groove is cylindrically radially offered along said; Be processed with four through holes on the said cylindrical end face vertically; Minor diameter end face one side that the central bore of said spacer shell is positioned at Rotary-table is conical central bore; The aperture of said conical central bore is reduced to the cylinder direction by Rotary-table gradually; Be processed with the spiral pin hole of two 180 degree symmetries and the screw of two 180 degree symmetries on the minor diameter end face of said Rotary-table, and each spiral pin hole is positioned at the centre of the screw of said two 180 degree symmetries.

The invention has the beneficial effects as follows: use spacer shell of the present invention during 130T boring machine processing vapor turbine wheel final stage race; Can prevent the boring spindle play, improve the rigidity of boring spindle, can satisfy processing request fully; Not only efficient is enhanced about more than once, and practices thrift at least 50 ten thousand yuan of cutter expenses.

Description of drawings

Fig. 1 is the front view of spacer shell of the present invention, and Fig. 2 is the A-A face cutaway view of Fig. 1, and Fig. 3 is the right view of Fig. 1, and Fig. 4 is the axonometric drawing of spacer shell of the present invention.

The specific embodiment

The specific embodiment one: in conjunction with Fig. 1-Fig. 4 explanation; The 130T boring machine processing vapor turbine wheel final stage race spacer shell of present embodiment; The profile of said spacer shell is made up of Rotary-table 10 and cylinder 11; Said Rotary-table 10 and cylinder 11 coaxial settings; And one is made in the major diameter end face of this Rotary-table 10 and a side end face of this cylinder 11; Said spacer shell is provided with the central bore 12 of perforation vertically; The perimeter of the opposite side end face of said cylinder 11 is provided with this annular projection 3 of annular projection 3(and cooperates with the lateral wall location of boring spindle as seam); The end of said annular projection 3 is processed with positioning key groove 2; Said positioning key groove 2 is along radially the offering of said cylinder 11 (said positioning key groove 2 cooperates with positioning key on the boring spindle); Being processed with four through holes 1 of four through hole 1(on the end face of said cylinder 11 vertically is threaded with pairing four screws on the boring machine square chest by four bolts; Thereby spacer shell of the present invention is fastenedly connected on the boring machine square chest); Minor diameter end face one side that the central bore 12 of said spacer shell is positioned at Rotary-table 10 is that the conical central bore 6 of conical central bore 6(is used for cooperating with the taper shank location of taking turns the slotting cutter cover); The aperture of said conical central bore 6 is reduced to cylinder 11 directions by Rotary-table 10 gradually; Be processed with the spiral pin hole 4 of two 180 degree symmetries and the screw 5 of two 180 degree symmetries on the minor diameter end face of said Rotary-table 10; And each spiral pin hole 4 is positioned at the centre of the screw 5 of said two 180 degree symmetries, and (corresponding two pin-and-holes are by the spiral pin location and be fastenedly connected on two spiral pin holes 4 and the wheel slotting cutter cover ring flange; Thereby spacer shell and wheel slotting cutter cover ring flange are fastened together; Corresponding through hole is fastenedly connected by screw on two spiral pin holes 4 and the wheel slotting cutter cover ring flange; So just can will take turns the slotting cutter cover and be fastened together, guarantee the rigidity of processing) with the boring machine square chest by this spacer shell.

The specific embodiment two: combine Fig. 2-Fig. 4 explanation; Major diameter end face place near Rotary-table 10 on the lateral wall of the said Rotary-table 10 of this embodiment is processed with four breach 7, said four breach 7 and four corresponding one by one settings of through hole 1 (guaranteeing that four bolts that spacer shell is fixedly connected with the boring machine square chest have headspace).Other is identical with the specific embodiment one.

During processing vapor turbine wheel final stage race; Spacer shell of the present invention is sleeved on the main shaft of 130T boring machine; And fix through positioning key; Simultaneously spacer shell is fastenedly connected on boring machine square chest and wheel slotting cutter cover ring flange; During processing vapor turbine wheel final stage race; Both can prevent the boring spindle play, improve the rigidity of boring spindle again.

Claims

1. 130T boring machine processing vapor turbine wheel final stage race spacer shell; It is characterized in that: the profile of said spacer shell is made up of Rotary-table (10) and cylinder (11); Said Rotary-table (10) and the coaxial setting of cylinder (11); And one is made in a side end face of the major diameter end face of this Rotary-table (10) and this cylinder (11); Said spacer shell is provided with the central bore (12) of perforation vertically; The perimeter of the opposite side end face of said cylinder (11) is provided with annular projection (3); The end of said annular projection (3) is processed with positioning key groove (2); Said positioning key groove (2) radially offering along said cylinder (11); Be processed with four through holes (1) on the end face of said cylinder (11) vertically; Minor diameter end face one side that the central bore of said spacer shell (12) is positioned at Rotary-table (10) is conical central bore (6); The aperture of said conical central bore (6) is reduced to cylinder (11) direction by Rotary-table (10) gradually; Be processed with the spiral pin hole (4) of two 180 degree symmetries and the screw (5) of two 180 degree symmetries on the minor diameter end face of said Rotary-table (10), and each spiral pin hole (4) is positioned at the centre of the screw (5) of said two 180 degree symmetries.

2. 130T boring machine processing vapor turbine wheel final stage race spacer shell according to claim 1; It is characterized in that: the major diameter end face place near Rotary-table (10) on the lateral wall of said Rotary-table (10) is processed with four breach (7), said four breach (7) and the corresponding one by one setting of four through holes (1).