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CN-122007858-A - Main bearing hot-charging lifting appliance of fan transmission system

CN122007858ACN 122007858 ACN122007858 ACN 122007858ACN-122007858-A

Abstract

The invention belongs to the technical field of lifting appliances, and discloses a hot-charging lifting appliance for a main bearing of a fan transmission system, which comprises a bearing main body which is rigidly connected with lifting equipment, wherein a micro-motion centering mechanism, a clamping mechanism and an anti-loosening mechanism are arranged on the bearing main body, the micro-motion centering mechanism comprises a first motor, a bearing seat, a screw rod, a lower moving block, a centering shaft, a mounting disc, a plug shaft and a first telescopic cylinder, a chamfer is arranged at the contact end of the plug shaft, and the upper moving block and the lower moving block are matched and limited.

Inventors

  • WANG GAOMI
  • ZHANG ZHIGANG
  • JIANG FEI
  • YU LEI
  • LIU XING
  • ZHANG JIANLEI

Assignees

  • 灵丘建投衡冠风能有限公司

Dates

Publication Date
20260512
Application Date
20260305

Claims (10)

  1. 1. The main bearing hot-charging lifting appliance of the fan transmission system comprises a bearing main body (1) which is rigidly connected with the output end of lifting equipment, and is characterized in that the bearing main body (1) is provided with a micro-motion centering mechanism (2), a clamping mechanism (3) and an anti-loosening mechanism (4); The bearing main body (1) comprises a bottom layer (101) and a top layer (102), a connecting column (103) is connected between the bottom layer (101) and the top layer (102), and avoidance holes (104) are formed in the middle positions of the bottom layer (101) and the top layer (102); The micro-motion centering mechanism (2) is located at the center of the bearing body (1), and comprises a first motor (201) and a bearing seat (202) which are installed on the lower surface of the bottom layer (101), the output end of the first motor (201) is connected with a screw rod (203), the end part of the screw rod (203) is installed on the bearing seat (202), the screw rod (203) is in threaded connection with a lower moving block (204), the lower moving block (204) is attached to the lower surface of the bottom layer (101), the lower moving block (204) is movably connected with a centering shaft (205), the centering shaft (205) is located in the avoidance hole (104), the lower end part of the centering shaft (205) is fixedly connected with a mounting disc (206), the mounting disc (206) is fixedly provided with an inserting shaft (207), the contact end of the inserting shaft (207) is provided with a chamfer, the upper end part of the centering shaft (205) is provided with a first telescopic cylinder (208), the upper moving block (209) is installed on the upper moving block (209), and the upper moving block (209) is attached to the surface of the top layer (102). The clamping mechanism (3) comprises three clamping jaws (301) which are evenly hinged to the side of the bottom layer (101), a sliding sleeve (302) is sleeved at the non-clamping end of each clamping jaw (301), a spherical hinge connecting piece (303) is fixedly arranged on the side face of each sliding sleeve (302), a straight rod (304) is fixedly connected to the other end of each spherical hinge connecting piece (303), a second telescopic cylinder (305) is connected to the power end of each straight rod (304), and the second telescopic cylinders (305) are fixedly arranged on the upper surface of the bottom layer (101); The anti-loosening mechanism (4) comprises an annular groove (401) arranged on the upper surface of the bottom layer (101) and a placing groove (402) arranged on the straight rod (304), a heavy bolt (403) is placed in the placing groove (402), the heavy bolt (403) can move upwards under the force of the placing groove (402), a toothed ring (404) is placed in the annular groove (401), the upper surface of the toothed ring (404) is provided with a helical tooth group (405) with the position quantity corresponding to the clamping jaw (301), helical teeth of the helical tooth group (405) incline upwards towards the direction of the clamping jaw (301), the helical tooth group (405) is a vertical surface relative to the inclined other surface, a round gear (406) is engaged and matched with the inner side of the toothed ring (404), the round gear (406) is rotatably installed on the bottom layer (101), a second motor (407) is connected with the power end of the round gear (406), the second motor (407) is fixedly installed on the top layer (102), and the helical tooth of the toothed ring (405) is provided with a lowest guide surface (408) and two sides of the helical tooth group (408) are connected with the lowest guide surface (408).
  2. 2. The hot-charging lifting appliance for the main bearing of the fan transmission system according to claim 1, wherein the bottom layer (101) and the top layer (102) are provided with limiting blocks (105), and the lower moving block (204) and the upper moving block (209) are respectively positioned in the limiting blocks (105) at corresponding positions.
  3. 3. The hot-mount lifting appliance for the main bearing of the fan transmission system according to claim 1, wherein the first motor (201) and the second motor (407) are motors provided with encoders, and the motors can rotate the rotating shaft under the condition of no power.
  4. 4. The hot-charging lifting appliance for the main bearing of the fan transmission system according to claim 1, wherein a temperature sensor is arranged on the outer side of the clamping jaw (301), and the temperature sensor is electrically connected with an alarm unit of the lifting appliance.
  5. 5. The hot-charging lifting appliance for the main bearing of the fan transmission system according to claim 1, wherein the sliding sleeve (302) is a zero-clearance polytetrafluoroethylene bushing, the spherical hinge connecting piece (303) is a rigid universal joint, and two ends of the rigid universal joint are respectively and rigidly connected with the sliding sleeve (302) and the straight rod (304).
  6. 6. The hot-charging lifting appliance for the main bearing of the fan transmission system according to claim 1, wherein the surfaces of the toothed ring (404) and the helical gear group (405) are coated with a molybdenum disulfide self-lubricating coating, and the lower end part of the heavy bolt (403) is provided with an arc chamfer, and the chamfer radius is matched with the radian of a tooth slot of the helical gear group (405).
  7. 7. The hot-charging lifting appliance for the main bearing of the fan transmission system according to claim 1, wherein a high-temperature-resistant silica gel pad is stuck on the inner side of the clamping jaw (301), and an anti-slip texture is arranged on the surface of the silica gel pad.
  8. 8. The hot-charging lifting appliance for the main bearing of the fan transmission system according to claim 1, wherein the outer sides of all power elements are provided with high-temperature-resistant protection structures.
  9. 9. The hot-charging lifting appliance for the main bearing of the fan transmission system according to claim 1, wherein a plurality of fixed connecting columns are uniformly arranged on the top of the top layer (102).
  10. 10. The hot-charging lifting appliance for the main bearing of a fan transmission system according to claim 1, wherein the bottom layer (101) is fixedly provided with a pressing plate positioned on the upper side of the toothed ring (404).

Description

Main bearing hot-charging lifting appliance of fan transmission system Technical Field The invention belongs to the technical field of lifting appliances, and particularly relates to a main bearing hot-charging lifting appliance of a fan transmission system. Background The main bearing of the fan transmission system is used as a core bearing part, a heavy structural design of 5 tons and more is adopted, high-precision interference fit is formed between the main bearing and a transmission shaft to ensure transmission stability, the assembly process generally depends on a hot-charging process, namely, the inner ring of the bearing is expanded through heating, and the inner ring of the bearing is accurately sleeved into the transmission shaft by virtue of a lifting appliance and then naturally cooled, so that interference fixation is realized. In the process, the hot-charging lifting appliance is core equipment for determining the assembly precision and the safety, and three core requirements are simultaneously met, namely centering precision is guaranteed, coaxiality of an inner ring of a bearing and a transmission shaft is guaranteed to be controlled to be +/-0.02 mm, vibration noise is avoided when a fan operates, heavy-load clamping reliability is improved, deflection is prevented in lifting and hot charging processes, loosening prevention safety is guaranteed, bearing state change caused by expansion and contraction is solved, and accidental falling risks are avoided. Along with the lifting of the single machine capacity of the fan to megawatt, the weight and the precision requirements of the main bearing are synchronously improved, and more severe requirements are put forward on the comprehensive performance of the hot-charging lifting appliance. The existing hot-charging lifting appliance gradually exposes a plurality of technical defects in practical application, namely that a centering mechanism adopts a single driving mode, or the fine adjustment precision is insufficient due to the oil compressibility of a hydraulic telescopic cylinder, or coarse adjustment efficiency is lacking due to the driving of a screw rod of a pure electric motor, and the centering shaft always bends and shakes under heavy load due to the lack of radial guiding, so that coaxiality cannot be ensured stably, and further, the clamping stability is always a technical problem to be considered at present. Disclosure of Invention Aiming at the problems of the background technology, the invention aims to provide a main bearing hot-charging lifting appliance of a fan transmission system. In order to achieve the technical purpose, the invention adopts the following technical scheme: The main bearing hot-charging lifting appliance of the fan transmission system comprises a bearing main body which is rigidly connected with the output end of lifting equipment, wherein the bearing main body is provided with a micro-motion centering mechanism, a clamping mechanism and an anti-loosening mechanism; The bearing main body comprises a bottom layer and a top layer, a connecting column is connected between the bottom layer and the top layer, and avoidance holes are formed in the middle positions of the bottom layer and the top layer; The micro-motion centering mechanism is positioned at the center of the bearing main body and comprises a first motor and a bearing seat which are arranged on the lower surface of the bottom layer, the output end of the first motor is connected with a screw rod, the end part of the screw rod is arranged on the bearing seat, the screw rod is in threaded connection with a lower moving block, the lower moving block is attached to the lower surface of the bottom layer, the lower moving block is movably connected with a centering shaft, the centering shaft is positioned in the avoidance hole, the lower end part of the centering shaft is fixedly connected with a mounting disc, the mounting disc is fixedly provided with an inserting shaft, the contact end of the inserting shaft is provided with a chamfer, the upper end part of the centering shaft is provided with a first telescopic cylinder, the mounting surface of the first telescopic cylinder is provided with an upper moving block, and the upper moving block is attached to the upper surface of the top layer; The clamping mechanism comprises three clamping jaws which are uniformly and hingedly arranged at the side of the bottom layer, a sliding sleeve is sleeved at the non-clamping end of each clamping jaw, a spherical hinge connecting piece is fixedly arranged at the side face of each sliding sleeve, a straight rod is fixedly connected with the other end of each spherical hinge connecting piece, a second telescopic cylinder is connected with the power end of each straight rod, and the second telescopic cylinders are fixedly arranged on the upper surface of the bottom layer; The anti-loosening mechanism comprises an annular groove arranged on the upper surface of the bottom