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CN-121989022-A - Hydraulic installation device of large-excess taper fit thrust disc and working method thereof

CN121989022ACN 121989022 ACN121989022 ACN 121989022ACN-121989022-A

Abstract

The invention belongs to the technical field of machining, discloses a hydraulic installation device of a large interference taper fit thrust disc and a working method thereof, and aims to solve the problem that the safety, repeated dismounting precision and deformation control of large interference taper fit cannot be considered in the prior art. The invention comprises a rotor fixing mechanism and a thrust disc mounting mechanism, wherein the thrust disc mounting mechanism also comprises a thrust disc pressing-in mechanism and a reaction force mechanism, the risk of high-pressure oil leakage is reduced through the split rotor fixing mechanism and the reaction force mechanism, the hydraulic mounting device adopts excircle positioning and axial step-by-step pressurization to control the deformation of the thrust disc, the modular design realizes quick assembly, the repeated mounting of the standard reaching rate of form and position tolerance is improved, and the reaction mechanism is designed by adopting the rotor speed measuring disc structure, so that the manufacturing cost is reduced. The hydraulic installation device of the large excess taper fit thrust disc and the working method thereof are applicable to assembly scenes with high accuracy requirements and multiple disassembly and assembly.

Inventors

  • LI SONGLIN
  • Ke Zerong
  • LI JINGYI
  • LI MAN
  • LIU YABING
  • WAN FANGQIAN
  • ZHANG GUIZHI
  • ZENG QIANG
  • ZHANG YUSHENG
  • MA RUOCHEN
  • JIANG TAO
  • LUO LIPING
  • LUO FEIXIA
  • LIU YANPING
  • MI LIANG

Assignees

  • 东方电气集团东方汽轮机有限公司

Dates

Publication Date
20260508
Application Date
20260210

Claims (10)

  1. 1. The hydraulic installation device for the large-excess taper fit thrust disc is characterized by comprising a rotor fixing mechanism (1) and a thrust disc installation mechanism (2), wherein the thrust disc installation mechanism (2) comprises a thrust disc pressing-in mechanism and a reaction force mechanism; the rotor fixing mechanism (1) comprises an upper half compression ring (101), compression screws (102), a copper compression block (103), a supporting copper backing ring (104), a supporting frame (105), a fixing mechanism base (106) and a hanging ring (107); The thrust disc pressing mechanism comprises a thrust disc pressing ring (201), a high-pressure oil pipe joint (203), a hollow jack (205) and an opening pressing cylinder (209); The reaction force mechanism comprises two half rings (202), a half ring connecting sleeve (204), a center pull rod (206) and a copper gasket (207).
  2. 2. The hydraulic installation device for the large interference taper fit thrust disc according to claim 1, wherein the upper half compression ring (101) is of a semi-annular structure, one side of the upper half compression ring (101) is clamped into a notch (111) of the support frame (105), the upper half compression ring (101) is hinged to the support frame (105) through a pin (109), the upper half compression ring (101) is fastened to the support frame (105) through a screw I (108) on the other side, and a threaded through hole is formed in the top of the upper half compression ring (101) and is used for accommodating a compression screw (102).
  3. 3. The hydraulic installation device of the large excess taper fit thrust disc according to claim 1, wherein the copper compression block (103) is provided with a T-shaped hole (113), and the T-shaped hole (113) is used for installing a compression screw (102).
  4. 4. The hydraulic installation device of the large excess taper fit thrust disc of claim 1, wherein strong glue is adopted between the support copper backing ring (104) and the support frame (105) for firm adhesion.
  5. 5. The hydraulic installation device for the large interference taper fit thrust disc according to claim 1, wherein the number of the supporting frames (105) is 2, the positioning distance of the supporting frames (105) is an adjustable structure, connecting through holes of the supporting frames (105) and the fixing mechanism base (106) are waist-shaped through hole structures (112), and the supporting frames (105) and the fixing mechanism base (106) are fastened through bolts II (110).
  6. 6. The hydraulic installation device for the large-excess taper fit thrust disc according to claim 1, wherein the thrust disc pressing ring (201) is of a full-circle annular structure, one side of the thrust disc pressing ring (201) is an inner hole spigot, the other side of the thrust disc pressing ring is of a stepped outer circle, the opening pressing cylinder (209) is of a cylindrical structure, the opening pressing cylinder (209) is used for transmitting thrust generated by the hollow jack (205) to the thrust disc pressing ring (201), a small hole (212) is formed in the bottom of the opening pressing cylinder (209) and used for penetrating into a central pull rod (206), and a waist-shaped notch II (218) is formed in one side of the outer circle, close to the large inner hole, and is used for installing high-pressure oil pipes and oil tubes.
  7. 7. The hydraulic installation device for the large interference taper fit thrust disc according to claim 1, wherein the two half rings (202) are of an upper half structure and a lower half structure and are combined into a whole circle, the two half rings (202) are used for transmitting the reaction force of pressing the thrust disc into a rotor body speed measuring fluted disc, a spigot (213) is arranged on one side of each of the two half rings (202), the spigot (213) is assembled and positioned with the rotor body speed measuring fluted disc, a threaded hole I (214) is formed in the end face of each of the two half rings, and the threaded hole I (214) is used for being fastened with the half ring connecting sleeve (204).
  8. 8. The hydraulic installation device for the large-surplus taper fit thrust disc according to claim 1, wherein the half-ring connecting sleeve (204) is used for connecting two half rings (202) and a center pull rod (206) and transmitting reaction force, a threaded hole II (215) is formed in an inner hole at the small end of the half-ring connecting sleeve (204), the threaded hole II (215) is used for being installed in the center pull rod (206), a through hole (216) is formed in a position, corresponding to the two half rings (202), of the large end face, the through hole (216) is used for being installed in a screw to fasten the two half rings (202), a waist-shaped notch I (217) is formed in the outer circle of the large end, the waist-shaped notch I (217) is used for being installed in a high-pressure oil pipe joint, a circular through hole is formed in the center of the hollow jack (205) and is used for being installed in the center pull rod (206), the center pull rod (206) is of a double-head threaded structure, one side thread of the threaded hole II is used for being fastened and connected with the half-ring connecting sleeve (204), and the other side is used for being installed in a nut to fasten the hollow jack (205).
  9. 9. The hydraulic installation device for the large excess taper fit thrust disc according to claim 1, wherein the hydraulic installation device further comprises a rubber pad (301) and a check ring nut (302), the rubber pad (301) is used for protecting the end face of the thrust disc to prevent the end face from being damaged when the thrust disc is withdrawn, and the check ring nut (302) is used for limiting withdrawal of the thrust disc to prevent the thrust disc from being instantaneously ejected when the thrust disc is disassembled.
  10. 10. A method of operating a hydraulic mounting device for a large excess taper fit thrust disc as claimed in any one of claims 1 to 9, comprising the steps of: (1) Marking, namely marking the rotor body and the thrust disc with a phase of 0 degree in the circumferential direction, and positioning the thrust disc in the circumferential direction of each disassembly and assembly; (2) Conical surface pretreatment, namely cleaning up the conical surface matched with the rotor body and the thrust disc, uniformly smearing red lead powder on the inner conical surface of the thrust disc, aligning the 0-degree phase of the thrust disc and the rotor body, pushing the thrust disc into the rotor body until the inner conical surface and the outer conical surface are tightly attached, uniformly and lightly knocking the thrust disc by adopting a rubber hammer circumference from the end surface, then taking down the thrust disc, checking the contact condition of the outer conical surface of the rotor body, and ensuring that the contact area is more than or equal to 90 percent and the oil duct is free from void during installation; (3) Mounting the support frames in place, namely placing the base of the fixing mechanism on an operation platform, determining the mounting positions of 2 support frames according to the positions of shaft diameters at two sides of the rotor body, fastening the support frames on the base of the fixing mechanism by adopting a screw II, mounting the support copper pad ring into the support frames, and firmly adhering by adopting strong adhesive; (4) The rotor body is in place, the rotor body is supported at the shaft diameter positions at two sides and is placed on 2 supporting frames, an upper half compression ring is buckled, the upper half compression ring is fastened on the supporting frames by adopting a screw I, then a compression screw is screwed, the rotor body is compressed by a copper compression block, the rotor body is prevented from displacement in the installation process, a rotor phase mark is adjusted to the upper position by 0 DEG, so that the installation alignment observation of a thrust disc is facilitated; (5) The thrust disc mounting mechanism is assembled by sleeving an inner hole spigot of a thrust disc pressing ring into a thrust disc and tightly jointing with the end face of the thrust disc, screwing a high-pressure oil pipe joint into a high-pressure oil hole on the end face of a rotor body and tightly jointing with the end face of the rotor body, winding a proper amount of raw material tape on the outer thread of the high-pressure oil pipe joint, putting copper gaskets into two half rings, clamping the two half rings into corresponding annular grooves of a rotor body speed measuring fluted disc, aligning screw holes of the two half rings with connecting sleeve connecting through holes of the half rings, fastening the two half rings with the connecting sleeve of the half rings by adopting two half ring fastening screws, screwing one side of a center pull rod into the screw hole of the small end of the connecting sleeve of the half ring, controlling the screwing depth according to the screw pitch of the unscrewed end out of the connecting sleeve of the half ring, sleeving an opening pressing cylinder into the connecting sleeve of the half ring until jointing sleeve is tightly jointing with the boss of the outer spigot of the thrust disc pressing ring, penetrating a hollow jack into a center pull rod, jointing the jack with the opening pressing cylinder, and loading the gasket, and tightly fastening the jack by adopting a pull rod nut; (6) The hydraulic cylinder pipe joint and the high-pressure oil pipe joint are well assembled, the hydraulic pressure is started to be injected into the hollow jack, the hydraulic pressure cannot be excessively high, the pressure is maintained at 5Mpa, then the high-pressure oil is slowly injected into the conical surface part of the thrust disk, the oil pressure rising rate is about 50Mpa/min, the oil pressure change condition of the hollow jack is observed in real time in the process of increasing the pressure of the high-pressure oil at the conical surface matching part, if the oil pressure of the hollow jack is reduced, the oil injection and the pressure supplementing are needed immediately, meanwhile, whether hydraulic oil seeps out at the joint part of the thrust disk and the conical surface of the rotor body is observed in real time, if the hydraulic oil seeps out, the oil pressure of the hollow jack is gradually increased, and the oil pressure is controlled at 5Mpa each time until the thrust disk is pressed into the position and tightly attached to the rotor body; (7) The pressure relief treatment comprises the steps of checking the clearance between the contact surface of the thrust disc and the rotor body by adopting a 0.02mm feeler gauge after the thrust disc is installed in place, ensuring that the whole circle of feeler gauge is not in, firstly, relieving the high-pressure oil pressure of the conical surface matching part of the thrust disc, continuously maintaining the pressure for more than or equal to 1min by using the hollow jack oil pressure, and then relieving the hollow jack oil pressure; (8) The thrust disc is disassembled, the mounting support frame is put in place and the rotor body is put in place again, then a rubber pad is installed, the retainer nut is screwed into the external thread of the end face of the rotor body, the screwing depth is enough for the complete free detachment of the thrust disc, then the high-pressure oil pipe joint is screwed into the high-pressure oil hole of the end face of the rotor body and tightly attached to the end face of the rotor body, a proper amount of raw material tape is wound on the external thread of the high-pressure oil pipe joint, then high-pressure oil is injected into the inner conical surface part of the thrust disc, the oil pressure rising rate is about 50Mpa/min until the thrust disc is withdrawn from the rotor body, and then the high-pressure oil pipe joint, the retainer nut, the rubber pad and the thrust disc are removed and cleaned.

Description

Hydraulic installation device of large-excess taper fit thrust disc and working method thereof Technical Field The invention belongs to the technical field of machining, and particularly relates to a hydraulic installation device of a large-excess taper fit thrust disc and a working method thereof. Background The thrust disc of the existing high-precision rotor is matched with the rotor body through a large excessive conical surface, the technical problems still exist, the first is high in machining difficulty, the machining precision requirement of the inner conical surface and the outer conical surface is strict, the second is high in installation risk, high-pressure oil assembly of at least 150MPa is needed, leakage is easy, safety is poor, the third is difficult to control deformation, the wall thickness of the thrust disc is only 7mm, interference is large, repeated disassembly and assembly are easy to deform, the fourth is difficult to maintain precision, the position tolerance requirement of the thrust surface is high, repeated disassembly and assembly are needed, and the fifth is high in supporting requirement, and special reaction force supporting structure is needed in final assembly. Although the conventional hydraulic method can form an assembly gap by high-pressure oil, the conventional hydraulic method lacks special devices and process control, and is difficult to solve the problems. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a hydraulic installation device of a large interference taper fit thrust disc and an installation method thereof, and aims to solve the problem that the prior art cannot consider the safety of large interference taper assembly, repeated disassembly and assembly precision and deformation control. In order to achieve the purpose of the invention, the technical scheme adopted is as follows: A hydraulic installation device of a large excess taper fit thrust disc comprises a rotor fixing mechanism 1 and a thrust disc installation mechanism 2, wherein the thrust disc installation mechanism comprises a thrust disc pressing-in mechanism and a reaction force mechanism. The rotor fixing mechanism 1 comprises an upper half compression ring 101, compression screws 102, a copper compression block 103, a supporting copper backing ring 104, a supporting frame 105, a fixing mechanism base 106 and a hanging ring 107; the thrust disc pressing mechanism comprises a thrust disc pressing ring 201, a high-pressure oil pipe joint 203, a hollow jack 205 and an opening pressing cylinder 209, and the reaction force mechanism comprises two half rings 202, a half ring connecting sleeve 204, a center pull rod 206 and a copper gasket 207. The upper half compression ring 101 is of a semi-annular structure, one side of the upper half compression ring 101 is clamped into a notch 111 of the support frame 105, the upper half compression ring 101 is hinged to the support frame 105 by adopting a pin 109, so that the upper half compression ring 101 can freely rotate when being positioned by the pin 109, after the rotor body is installed in the support frame 105, the upper half compression ring is buckled, and the other side of the upper half compression ring 101 is fastened with the support frame 105 by adopting a screw I108. The top of the upper half compression ring 101 is a threaded through hole, and the threaded through hole is used for accommodating the compression screw 102. The copper compression block 103 is used for compressing the rotor, a T-shaped hole 113 is formed in the copper compression block 103 and used for being filled with the compression screw 102, and therefore the copper compression block 103 is driven to move up and down together when the compression screw 102 moves up and down, and compression and release of the rotor are achieved. The supporting copper backing ring 104 is used for protecting the journal, the supporting copper backing ring 104 is not required to be disassembled and assembled in the using process of the device, and the supporting copper backing ring 104 and the supporting frame 105 are firmly adhered by strong glue. The number of the supporting frames 105 is 2 according to the shaft diameter position of the rotor, the positioning distance of the 2 supporting frames 105 is preferably an adjustable structure, the position of the supporting frames 105 can be adjusted according to the shaft diameter sizes of different rotors, the connecting through holes of the supporting frames 105 and the fixing mechanism base 106 are waist-shaped through hole structures 112, and the supporting frames 105 and the fixing mechanism base 106 are fastened by bolts II 110. The hanging ring 107 is used for hanging and transferring the whole installation device. The thrust disc pressing ring 201 is of a whole-circle annular structure, and is used for receiving thrust of the opening pressing cylinder to press into the thrust disc when the device is use