CN-115978106-B - Jigger device for optical axis of steam turbine generator unit and axle-locking mechanism thereof

CN115978106BCN 115978106 BCN115978106 BCN 115978106BCN-115978106-B

Abstract

The invention relates to a jigger device for an optical axis of a steam turbine generator unit and a shaft holding mechanism thereof, wherein the shaft holding mechanism comprises a first cuff ring assembly, a second cuff ring assembly, at least two brake blocks, at least two lock catch assemblies and a first transmission assembly, wherein the brake blocks are respectively arranged on wall surfaces of the first cuff ring assembly and the second cuff ring assembly, which are opposite to the peripheral surface of the optical axis, and are used for abutting the peripheral surface of the optical axis, two ends of the first cuff ring assembly and the second cuff ring assembly are respectively connected into a ring through the lock catch assemblies so as to be arranged on the periphery of the optical axis in a surrounding manner, the first transmission assembly is arranged on the first cuff ring assembly and the second cuff ring assembly so as to drive the shaft holding mechanism to rotate along the optical axis around the central axis of the optical axis under the driving of the driving mechanism, and the shaft holding mechanism can be quickly and reliably arranged on the optical axis, so that the jigger device can be quickly put into jigger operation, the safety of the unit is ensured, permanent bending damage of a large shaft is avoided, and the large repairing period is reduced.

Inventors

DUAN XIANDONG
JIA KAILI
ZHANG YAHUI
HUANG WUFENG
GUAN YUNSHENG
ZHOU GONGLIN
LIU SIWEI
ZHENG HUABING
JIANG CHANGGUO

Assignees

中广核核电运营有限公司
中国广核集团有限公司
中国广核电力股份有限公司

Dates

Publication Date: 20260505
Application Date: 20221208

Claims (9)

1. The axle locking mechanism for the optical axis is characterized by comprising a first cuff ring assembly (12), a second cuff ring assembly (13), at least two brake pads (11), at least two lock catch assemblies (14) and a first transmission assembly (15); The brake block (11) is respectively arranged on the wall surfaces of the first cuff ring assembly (12) and the second cuff ring assembly (13) which are opposite to the peripheral surface of the optical axis and used for abutting the peripheral surface of the optical axis; the two ends of the first cuff ring component (12) and the second cuff ring component (13) are respectively connected into a ring through the lock catch component (14) in a combined way so as to be arranged on the periphery of the optical axis in a surrounding way; The first transmission assembly (15) is arranged on the first cuff ring assembly (12) and the second cuff ring assembly (13) so as to drive the axle-holding mechanism (1) together with the optical axis to rotate around the central axis of the optical axis under the drive of the driving mechanism (2); wherein the first transmission assembly (15) comprises at least two arcuate gears; The arc gears are respectively correspondingly arranged on the first cuff ring component (12) and the second cuff ring component (13), and when the first cuff ring component (12) and the second cuff ring component (13) are combined into a ring, a hollow gear which is arranged on the peripheral surface of the optical axis in a surrounding way and concentric with the optical axis is formed; A first assembling groove is formed in the end face of each arc gear, which is opposite to the first cuff ring assembly (12) or the second cuff ring assembly (13); the first cuff ring component (12) and the second cuff ring component (13) are provided with first protrusions matched with the first assembling grooves relative to the surface of the arc gear, and the arc gear and the first cuff ring component (12) or the second cuff ring component (13) are driven by friction force between the first protrusions and the first assembling grooves.
2. The axle-locking mechanism for an optical axis according to claim 1, wherein the first cuff ring assembly (12) comprises a first arched portion arranged on the periphery of the optical axis and two first matching portions extending outwards from two ends of the first arched portion, wherein the first arched portion is provided with a first bottom wall surface which is opposite to the peripheral surface of the optical axis and takes an arc shape, the brake pad (11) covers the first bottom wall surface, and the first matching portions are used for being connected with the lock catch assembly (14); the second cuff ring assembly (13) comprises a second arched portion arranged on the periphery of the optical axis and two second matching portions extending outwards of the optical axis from two ends of the second arched portion, the second arched portion is provided with a second bottom wall surface which is opposite to the peripheral surface of the optical axis and is arc-shaped, the brake pad (11) covers the second bottom wall surface, and the second matching portions are used for being connected with the lock catch assembly (14).
3. The clasping mechanism for an optical axis according to claim 2, wherein the lock catch assembly (14) includes a lock lever (141), a lock plate (142), and a lock member; the lock rod (141) is elongated and has a first end and a second end opposite to the first end; The first end is hinged in one of the second matching parts, so that the lock rod (141) rotates around the first end as a base point and enters the first matching part; The second end is configured to protrude from a surface of the first mating portion away from the second mating portion when the lock lever (141) enters the corresponding first mating portion; The lock plate (142) is used for being sleeved on the second end; the lock is adapted to be fixedly coupled to the second end to secure the lock plate (142) to the second end.
4. The clasping mechanism for an optical axis of claim 2, wherein the first arch comprises: at least two first rib plates (121) which are arched, wherein the at least two first rib plates (121) are mutually arranged at intervals along the axial direction of the optical axis; A plurality of first cross members (123) respectively attached to the at least two first ribs (121) to connect the at least two first ribs (121) together side by side; a first brake tile (124) mounted on an inner wall surface of the at least two first ribs (121) opposite to the optical axis peripheral surface; and, the second arch includes: The at least two second rib plates (131) are arched, and the at least two second rib plates (131) are mutually arranged at intervals along the axial direction of the optical axis; A plurality of second cross members (133) respectively attached to the at least two second ribs (131) to connect the at least two second ribs (131) together side by side; a second brake tile (134) mounted on an inner wall surface of the at least two second ribs (131) opposite to the optical axis peripheral surface; wherein the at least two brake pads (11) are respectively covered on the wall surfaces of the first brake tile (124) and the second brake tile (134) facing the optical axis.
5. The clasping mechanism for an optical axis according to claim 4, wherein each of the first fitting portions includes first fitting plates (122) on the same side of the optical axis and in the same number as the first ribs (121), the first fitting plates (122) being correspondingly bonded to the end portions of the first ribs (121) and extending outwardly in the circumferential direction of the optical axis; And each first matching part comprises second matching plates (132) which are positioned on the same side of the optical axis and have the same number as the second rib plates (131), and the second matching plates (132) are correspondingly combined with the end parts of the second rib plates (131) and extend outwards along the circumferential direction of the optical axis.
6. A clasping mechanism for an optical axis according to claim 3, wherein the clasping mechanism (1) further comprises a connecting assembly (16) for mechanically connecting the other of the first mating portions and the corresponding second mating portion; The connecting assembly (16) comprises a connecting rod (161), a first bolt (162) and a second bolt (163), wherein the first bolt (162) axially penetrates through the first matching part along the optical axis, the second bolt (163) axially penetrates through the second matching part along the optical axis, and two ends of the connecting rod (161) are respectively hinged to the first bolt (162) and the second bolt (163).
7. A clasping mechanism for an optical axis according to claim 1, further comprising at least one centering assembly (17) for centering the optical axis with the first transmission assembly (15); The centering assembly (17) comprises a fixing part (171) arranged on the axial end face of the arc gear, and a jackscrew (172) which penetrates through the fixing part (171) along the radial direction of the optical axis and can move along the radial direction, and one end, close to the optical axis, of the jackscrew (172) is used for abutting against the peripheral surface of the optical axis.
8. A jigger device characterized by comprising a drive mechanism (2) and a clasping mechanism according to any one of claims 1 to 7; the driving mechanism (2) is mechanically matched with a first transmission assembly (15) of the axle-holding mechanism (1) so as to drive the axle-holding mechanism (1) and the optical axis to rotate by taking the central axis of the optical axis as the center.
9. The jigger device according to claim 8, characterized in that it further comprises a first slide rail (4), a base (3) sliding on the first slide rail (4) and a second slide rail (51) provided on the base (3); the first sliding rail (4) extends along the axial direction of the optical axis; The second slide rail (51) extends in a direction perpendicular to the axial direction of the optical axis; The driving mechanism (2) is connected to the second sliding rail (51) in a sliding manner.

Description

Jigger device for optical axis of steam turbine generator unit and axle-locking mechanism thereof Technical Field The invention relates to the field of maintenance of steam turbine generator units, in particular to a jigger device for an optical axis of a steam turbine generator unit and a shaft locking mechanism of the jigger device. Background In the related art, a steam turbine generator unit is provided with an electric jigger and an auxiliary hydraulic jigger, and the two jigger devices are used for jiggering, but the reliability of the two jiggers is poor. Historically, two jiggers of the same type unit can not be used when the same type unit happens for many times, so that the condition that the shaft system is in a static state in a thermal state when the steam turbine generator unit is stopped is caused, and serious safety risk of damage to important equipment caused by bending of a large shaft is caused. Or the shafting jigger can not be started to realize the continuous jigger movement during the ascending period after the overhaul of the unit, thereby delaying the overhaul period. In addition, the auxiliary turning signal needs to be repeatedly reset by a main control, the communication time is long, the turning rotating speed is low, and the adjustment of the center of the shaft system is influenced. Disclosure of Invention The invention aims to solve the technical problem of providing a jigger device for an optical axis of a steam turbine generator unit and a shaft locking mechanism thereof. The invention solves the technical problems by adopting the technical scheme that the axle locking mechanism for the optical axis comprises a first cuff ring component, a second cuff ring component, at least two brake pads, at least two lock catch components and a first transmission component; The brake pads are respectively arranged on the wall surfaces of the first cuff ring component and the second cuff ring component, which are opposite to the peripheral surface of the optical axis, and are used for abutting the peripheral surface of the optical axis; The two ends of the first cuff ring component and the second cuff ring component are respectively connected into a ring through the lock catch component in a combined mode so as to be arranged on the periphery of the optical axis in a surrounding mode; The first transmission component is arranged on the first cuff ring component and the second cuff ring component so as to drive the axle-holding mechanism to rotate along with the optical axis around the central axis of the optical axis under the drive of the driving mechanism. In some embodiments, the first cuff ring assembly comprises a first arched part arranged at the periphery of the optical axis and two first matching parts extending outwards from two ends of the first arched part, wherein the first arched part is provided with a first bottom wall surface opposite to the peripheral surface of the optical axis and is arc-shaped, and the brake pad covers the first bottom wall surface; The second cuff ring assembly comprises a second arched portion and two second matching portions, the second arched portion is arranged on the periphery of the optical axis, the two second matching portions extend outwards of the optical axis from two ends of the second arched portion, the second arched portion is provided with a second bottom wall surface which is opposite to the peripheral surface of the optical axis and is arc-shaped, the brake pad covers the second bottom wall surface, and the second matching portions are used for being connected with the lock catch assembly. In some embodiments, the latch assembly includes a lock lever, a latch plate, and a latch; the lock rod is in an elongated shape and is provided with a first end and a second end opposite to the first end; The first end is hinged in one of the second matching parts, so that the lock rod rotates around the first end as a base point and enters the first matching part; The second end is configured to protrude from a surface of the first mating portion away from the second mating portion when the lock lever enters the corresponding first mating portion; the lock plate is used for being sleeved on the second end; The locking piece is used for being fixedly connected with the second end so as to fix the locking plate on the second end. In some embodiments, the first arch comprises: The at least two first rib plates are arched, and are mutually arranged at intervals along the axial direction of the optical axis; a plurality of first cross beams respectively mounted on the at least two first ribs to connect the at least two first ribs together in a side-by-side manner; The first brake tile is arranged on the inner wall surface of the at least two first rib plates, which is opposite to the optical axis peripheral surface; and, the second arch includes: the at least two second rib plates are arched, and are mutually arranged at intervals along the axial dir