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CN-121988779-A - Automatic milling equipment and method for steam turbine rotor

CN121988779ACN 121988779 ACN121988779 ACN 121988779ACN-121988779-A

Abstract

The invention provides automatic milling equipment and method for a steam turbine rotor, and mainly relates to the field of steam turbine rotor milling. The utility model provides a steam turbine rotor automatic milling equipment, the on-line screen storage device comprises a base, the base both ends all set up the frame, rotate on the frame and set up clamping mechanism, at least one side of base sets up parallel slide rail and servo sideslip mechanism, set up the sideslip seat on the parallel slide rail, set up on the base with parallel slide rail parallel arrangement's end slide rail and end sideslip mechanism, set up the supporting seat on the end slide rail, set up the adjustment jar that is used for driving the adjustment seat on the supporting seat, set up vertical slide rail and lifting cylinder on the adjustment seat, the slip sets up the lifting cylinder on the vertical slide rail, the lifting cylinder is used for carrying out the jacking to the lifting seat, the lifting seat top sets up "V" type groove. The method has the advantages that unbalance caused by the gravity of the turbine rotor can be counteracted, and the milling groove processing precision of the rotor impeller is improved.

Inventors

  • GUO FENG
  • WEI GUANGLIANG
  • ZHAO LEI
  • CHEN HAOJUN
  • HU XIUXIN
  • Zhang Guangdan

Assignees

  • 滕州市大恒机床有限公司

Dates

Publication Date
20260508
Application Date
20260303

Claims (9)

  1. 1. The automatic milling equipment for the steam turbine rotor comprises a base (1), wherein two ends of the base (1) are respectively provided with a base (2), the automatic milling equipment is characterized in that the base (2) is rotatably provided with a clamping mechanism (21), at least one of the clamping mechanisms (21) is a driving mechanism, at least one side of the base (1) is provided with a parallel sliding rail (11) and a servo traversing mechanism (13), the parallel sliding rail (11) is provided with a traversing seat (12), the traversing seat (12) is provided with a milling machine head (3), the base (1) is provided with a bottom sliding rail (14) and a bottom traversing mechanism (16) which are arranged in parallel with the parallel sliding rail (11), the bottom sliding rail (14) is provided with a supporting seat (4), the supporting seat (4) is provided with an adjusting sliding rail (41), the adjusting sliding seat (41) is provided with at least two adjusting seats (42), the supporting seat (4) is provided with an adjusting cylinder (43) for driving the adjusting seats (42), the adjusting seats (42) are provided with a vertical sliding rail (51) and a lifting sliding rail (52), the lifting seat (53) is provided with a lifting groove (53), two sides of the V-shaped groove (54) are provided with a plurality of grooved wheels (55).
  2. 2. The automatic milling equipment for the steam turbine rotor according to claim 1, wherein the V-shaped groove (54) comprises a groove block (541) and a sliding groove (542) arranged on the lifting seat (53), the groove block (541) is in sliding connection with the sliding groove (542), an adjusting screw rod (543) is rotatably arranged in the sliding groove (542), and a screw rod nut matched with the adjusting screw rod (543) is arranged at the bottom of the groove block (541).
  3. 3. The automatic milling equipment for the steam turbine rotor is characterized in that the vertical sliding rail (51) is at least four cylindrical guide rails which are uniformly arranged, and a guide cavity which is in sliding fit with the cylindrical guide rails is formed in the bottom of the lifting seat (53).
  4. 4. The automatic milling equipment for the steam turbine rotor is characterized in that the slot milling machine head (3) is provided with a feeding unit and a lifting unit, the feeding unit is used for driving a tool bit to be close to or far away from a rotor clamped between two machine bases (2), and the lifting unit is used for driving the tool bit to perform lifting action.
  5. 5. The automatic milling equipment for the steam turbine rotor is characterized in that one of the machine bases (2) is a movable base, a sliding pair which is in sliding fit with an adjusting sliding rail (41) is arranged at the bottom of the movable base, and a servo adjusting mechanism (15) for driving the movable base is arranged on the base (1) below the movable base.
  6. 6. The automatic milling equipment for the steam turbine rotor is characterized in that parallel sliding rails (11) and servo traversing mechanisms (13) are arranged on two sides of the base (1), traversing seats (12) and slot milling heads (3) are arranged on each parallel sliding rail (11), and the slot milling heads (3) on two sides synchronously finish slot milling operation of the steam turbine rotor.
  7. 7. The automatic milling equipment for the steam turbine rotor is characterized in that at least three adjusting seats (42) are arranged, and V-shaped grooves (54) corresponding to the adjusting seats (42) are respectively positioned in annular grooves on two sides of two adjacent impellers.
  8. 8. A method for milling a turbine rotor, using the milling equipment according to any one of claims 1 to 7 to finish the milling of a groove of a turbine rotor wheel, comprising the steps of: Firstly, installing a turbine rotor between engine bases through a hoisting mechanism, and clamping a turbine rotor through a clamping mechanism; S2, adjusting the position of a milling head to an impeller to be processed of a steam turbine rotor, adjusting a supporting seat to move below the impeller to be processed, and then adjusting the distance between the adjusting seats and the height of a lifting seat, and supporting annular grooves on two sides of the impeller to be processed through V-shaped grooves; S3, driving the turbine rotor to rotate through the clamping mechanism, detecting the jump degree of the turbine rotor by using a dial indicator, and adjusting the jacking force of the V-shaped groove on the rotor during the process to ensure that the jump data of the impeller is in an optimal state; And S4, subsequently controlling the clamping mechanism to rotate step by step, and finishing the groove milling operation of the impeller by using the groove milling machine head.
  9. 9. The automatic milling equipment for the steam turbine rotor is characterized in that in S4, two milling heads are arranged on two sides of the base, and the two milling heads are used for milling grooves on two sides of the same impeller or two adjacent impellers respectively.

Description

Automatic milling equipment and method for steam turbine rotor Technical Field The invention mainly relates to the field of milling of steam turbine rotors, in particular to automatic milling equipment and method for steam turbine rotors. Background The turbine rotor is a core component of the turbine and is responsible for converting the heat energy of steam into mechanical energy, wherein a turbine rotor impeller of a middle-low pressure part adopts a sleeved structure, the turbine rotor of the structure firstly processes a shaft body and a rotary drum (impeller) through turning, and then processes a mounting groove assembled with a blade on the rotary drum (impeller) through milling. Because the whole size of the rotor is larger, and the gravity change of the area where the impeller is located is obvious, in the milling process of the mounting groove of the impeller of the rotor, errors are generated in the milling groove due to the gravity change, so that the problems of mechanical vibration, work efficiency reduction and the like are caused in the final use process of the rotor, and the dynamic balance of the rotor is influenced. And the assembled blade also amplifies the problem to some extent. Therefore, after milling is completed, dynamic balance test is usually required, and the dynamic balance test is gradually corrected to be put into use. Although the dynamic balance detection can correct the problem, complicated measuring and correcting procedures are needed in the process, and the cost is high. If the jump degree of the impeller can be ensured to be normal in the milling process of the rotor impeller, the milling process of the mounting groove can be more accurate, and the unbalance amount of the turbine rotor is reduced, so that the investment of dynamic balance detection and correction is reduced, and the overall processing efficiency is improved. Disclosure of Invention In order to solve the defects in the prior art, the invention provides automatic milling equipment and method for a steam turbine rotor, which can offset the unbalance caused by the gravity of the steam turbine rotor and improve the milling precision of a rotor impeller milling groove. The invention aims to achieve the aim, and the aim is achieved by the following technical scheme: The automatic milling equipment for the steam turbine rotor comprises a base, two ends of the base are provided with bases, the bases are provided with clamping mechanisms in a rotating mode, at least one of the clamping mechanisms is a driving mechanism, at least one side of the base is provided with a parallel sliding rail and a servo transverse moving mechanism, a transverse moving seat is arranged on the parallel sliding rail, a milling groove machine head is arranged on the transverse moving seat, a bottom sliding rail and a bottom transverse moving mechanism are arranged on the base and parallel sliding rails are arranged in parallel, a supporting seat is arranged on the bottom sliding rail, an adjusting sliding rail is arranged on the supporting seat, at least two adjusting seats are arranged on the adjusting sliding rail in a sliding mode, an adjusting cylinder for driving the adjusting seats is arranged on the supporting seat, a vertical sliding rail and a lifting cylinder are arranged on the vertical sliding rail in a sliding mode, the lifting cylinder is used for jacking the lifting seat, V-shaped grooves are formed in the top of the lifting seat, and a plurality of grooved wheels are arranged on two sides of the V-shaped grooves. Preferably, the V-shaped groove comprises a groove block and a sliding groove arranged on the lifting seat, the groove block is in sliding connection with the sliding groove, an adjusting screw rod is arranged in the sliding groove in a rotating mode, and a screw nut matched with the adjusting screw rod is arranged at the bottom of the groove block. Preferably, the vertical sliding rail is at least four cylindrical guide rails which are uniformly arranged, and the bottom of the lifting seat is provided with a guide cavity which is in sliding fit with the cylindrical guide rails. Preferably, the milling groove machine head is provided with a feeding unit and a lifting unit, the feeding unit is used for driving the cutter head to be close to or far away from a rotor clamped between the two machine bases, and the lifting unit is used for driving the cutter head to lift. Preferably, one of the bases is a movable base, a sliding pair in sliding fit with the adjusting slide rail is arranged at the bottom of the movable base, and a servo adjusting mechanism for driving the movable base is arranged on the base below the movable base. Preferably, parallel sliding rails and servo traversing mechanisms are arranged on two sides of the base, traversing seats and slot milling heads are arranged on each parallel sliding rail, and slot milling heads on two sides synchronously finish slot milling operation of the steam turbin