阅读说明：本技术 在船舶机舱内将发电机转子移出发电机机座的方法 (Method for moving generator rotor out of generator base in ship engine room ) 是由 赵建华 丁榴红 张旭旭 安冠豪 于 2020-11-30 设计创作，主要内容包括：本发明公开了一种在船舶机舱内将发电机转子移出发电机机座的方法,包括以下步骤：1)断开柴油机和发电机的连接,2)发电机机座底部落在数根圆钢上,3)拆除轴承座、轴承、端盖及发电机风扇,4)发电机转子一端的励磁机铁芯移出发电机机座,5)转子铁芯部分移出发电机机座,6)转子铁芯完全移出发电机机座,7)完成发电机转子移出发电机机座。本发明通过机舱行车和支撑小车的配合作业,将发电机转子分阶段逐步移出发电机机座,解决了在狭小低矮的船舶机舱内发电机转子维修的难题,在船舶机舱现场就能维修发电机转子,省时省力,显著提高了船用发电机组的维修效率,降低了维修成本。(The invention discloses a method for moving a generator rotor out of a generator base in a ship engine room, which comprises the following steps: 1) disconnecting the connection between the diesel engine and the generator, 2) dropping the bottom of the generator base on a plurality of round steel, 3) removing the bearing seat, the bearing, the end cover and the generator fan, 4) moving an exciter core at one end of the generator rotor out of the generator base, 5) partially moving the rotor core out of the generator base, 6) completely moving the rotor core out of the generator base, and 7) completing the movement of the generator rotor out of the generator base. The generator rotor is gradually moved out of the generator base in stages through the cooperation of the engine room travelling crane and the supporting trolley, the problem of maintenance of the generator rotor in a narrow and short ship engine room is solved, the generator rotor can be maintained on site in the ship engine room, time and labor are saved, the maintenance efficiency of the ship generator set is obviously improved, and the maintenance cost is reduced.)

1. A method of moving a generator rotor out of a generator housing in a marine vessel nacelle, comprising the steps of:

1) firstly, removing a coupling fastener for connecting an output shaft of a diesel engine and a rotor shaft of a generator, then respectively welding a plurality of fixing blocks outside one end of the bottom of a generator base facing the diesel engine on a common underframe at the bottom of a diesel generator set, respectively screwing bolts into the corresponding fixing blocks, and pushing the end of each bolt to one end of the bottom of the generator base to push the generator to move in a direction departing from the diesel engine, so that a half coupling at the output shaft end of the diesel engine and the half coupling at the rotor shaft are separated from each other, and the connection between the diesel engine and the generator;

2) firstly, hoisting slings of a cabin travelling crane and slings of a hand-pulled hoist block temporarily mounted on a cabin travelling beam to respectively hoist hoisting plates on two sides of a generator base, then simultaneously moving the two slings upwards to hoist the generator to separate the generator from a common underframe, and then placing a plurality of round steel serving as rollers between the bottom of the generator base and the common underframe; the generator is pushed and moves away from the diesel engine under the rolling support of the round steel bars;

3) respectively dismantling bearing seats and bearings at two ends of a generator rotor shaft, end covers at two ends of a generator and a generator fan, and preparing to move out a generator rotor;

4) a rotor shaft half-coupling at one end of a generator rotor shaft is hung by a cabin travelling crane sling, an adjustable support on a first support trolley supports the other end of the generator rotor shaft, then the cabin travelling crane drives the cabin travelling crane sling to move towards the direction away from a diesel engine, and the cabin travelling crane sling and the adjustable support on the first support trolley drive the generator rotor shaft to move outwards until an exciter iron core at one end of a generator rotor moves out of a generator base; then one end of a first suspender is fixed on the end surface of the rotor shaft half-coupling;

5) moving a cabin crane sling to a first suspender, then driving the cabin crane sling to move towards a direction away from the diesel engine by the cabin crane sling and an adjustable support on a first support trolley, and driving the generator rotor to move outwards by the cabin crane sling and an adjustable support on the first support trolley until the rotor core part moves out of the generator base; then one end of a second suspender is fixedly connected with the other end of the first suspender;

6) moving the cabin crane sling to a second suspender, then driving the cabin crane sling to move towards the direction away from the diesel engine, driving the generator rotor to move outwards by the cabin crane sling and the adjustable support on the first support trolley until the rotor core is completely moved out of the generator base, and supporting the lower side of the rotor core by a plurality of adjustable supports on the second support trolley;

7) the engine room crane sling is taken down, then the two suspension rods are disassembled, then the rotor core is pushed, and the generator rotor is completely moved out of the generator base under the support of the adjustable support of the first trolley and the 3 adjustable supports on the second supporting trolley.

2. The method of moving a generator rotor out of a generator housing in a marine nacelle of claim 1, wherein the boom comprises flanges at two ends and a boom body in the middle, and wherein the two ends of the boom body are welded to the corresponding flanges respectively.

3. The method for moving the generator rotor out of the generator base in the ship cabin according to claim 1, wherein the adjustable support comprises a base, a screw rod and an upper supporting plate, the lower part of the base is respectively fixed on the upper side of the corresponding supporting trolley, the lower end of the screw rod is screwed into the base, the upper end of the screw rod is respectively connected with the corresponding upper supporting plate, and the upper supporting plate is respectively supported on the lower side of the end socket at one end of the generator rotor shaft or on the lower side of the rotor core.

4. The method of removing a generator rotor from a generator base in a marine nacelle of claim 3 wherein the upper plate support surface of the adjustable support is V-shaped and the wheels at the bottom of the first support cart and the second support cart are supported on the floor of the marine nacelle.

Technical Field

The invention relates to a maintenance method of a marine generator set, in particular to a method for horizontally moving a motor rotor from a generator base in a low and narrow marine engine room, and belongs to the technical field of motor maintenance.

Background

The marine generator set is positioned in a ship engine room under a deck, consists of a diesel engine and a generator which are arranged on a common underframe and connected through a coupling, and is key equipment for providing power for a ship. The generator needs to be overhauled after long-term operation, and at the moment, if the rotor of the generator is detected to be in fault, the rotor of the generator needs to be extracted from the base of the generator for further detection and repair. However, in the cabin or other narrow spaces, the hoisting capacity of the site and field traveling crane is limited, so that the whole generator cannot be hoisted smoothly, and the motor rotor cannot be moved out of the generator base. The generator complete machine is hoisted to the shore by using a crane on the wharf only after the ship is berthed on the wharf, and the generator complete machine is sent to a maintenance workshop to hoist out the generator rotor for maintenance. The maintenance method causes that the ship can not sail, and the sailing efficiency of the ship is seriously influenced. If the generator rotor must be maintained in the nacelle, in order to hoist the complete machine or the generator rotor smoothly, the objects which obstruct the movement of the generator rotor on site, such as a bulkhead plate, an air duct and the like, must be disassembled. And large-scale hoisting equipment is added, and the original shape needs to be recovered afterwards, so that time and labor are wasted, the maintenance cost is increased, and the maintenance efficiency of the marine generator set is seriously influenced.

Disclosure of Invention

The invention aims to provide a labor-saving and convenient method for moving a generator rotor out of a generator base in a ship engine room

The invention is realized by the following technical scheme:

a method of moving a generator rotor out of a generator housing in a marine vessel nacelle, comprising the steps of:

1) firstly, removing a coupling fastener for connecting an output shaft of a diesel engine and a rotor shaft of a generator, then respectively welding a plurality of fixing blocks outside one end of the bottom of a generator base facing the diesel engine on a common underframe at the bottom of a diesel generator set, respectively screwing bolts into the corresponding fixing blocks, and pushing the end of each bolt to one end of the bottom of the generator base to push the generator to move in a direction departing from the diesel engine, so that a half coupling at the output shaft end of the diesel engine and the half coupling at the rotor shaft are separated from each other, and the connection between the diesel engine and the generator;

2) firstly, hoisting slings of a cabin travelling crane and slings of a hand-pulled hoist block temporarily mounted on a cabin travelling crane beam to respectively hoist hoisting plates on two sides of a generator base, then moving the two slings upwards simultaneously to hoist the generator to separate from a common underframe, then placing a plurality of round steel serving as rollers between the bottom of the generator base and the common underframe, then moving the two slings downwards simultaneously, and dropping the bottom of the generator base on the plurality of round steel; then the generator is pushed, and the generator moves away from the diesel engine under the rolling support of the round steel bars;

3) respectively dismantling bearing seats and bearings at two ends of a generator rotor shaft, end covers at two ends of a generator and a generator fan, and preparing to move out a generator rotor;

4) a rotor shaft half-coupling at one end of a generator rotor shaft is hung by a cabin travelling crane sling, an adjustable support on a first support trolley supports the other end of the generator rotor shaft, then the cabin travelling crane drives the cabin travelling crane sling to move towards the direction away from a diesel engine, and the cabin travelling crane sling and the adjustable support on the first support trolley drive the generator rotor shaft to move outwards until an exciter iron core at one end of a generator rotor moves out of a generator base; then one end of a first suspender is fixed on the end surface of the rotor shaft half-coupling;

5) moving a cabin crane sling to a first suspender, then driving the cabin crane sling to move towards a direction away from the diesel engine by the cabin crane sling and an adjustable support on a first support trolley, and driving the generator rotor to move outwards by the cabin crane sling and an adjustable support on the first support trolley until the rotor core part moves out of the generator base; then one end of the second suspender is fixedly connected with the other end of the first suspender,

6) moving the cabin crane sling to a second suspender, then driving the cabin crane sling to move towards the direction away from the diesel engine, driving the generator rotor to move outwards by the cabin crane sling and the adjustable support on the first support trolley until the rotor core is completely moved out of the generator base, and supporting the lower side of the rotor core by a plurality of adjustable supports on the second support trolley;

7) the engine room crane sling is taken down, then the two suspenders are disassembled, then the rotor core is pushed, and the generator rotor is completely moved out of the generator base under the support of the adjustable support of the first support trolley and the plurality of adjustable supports on the second support trolley.

The object of the invention is further achieved by the following technical measures.

Furthermore, the suspender comprises flanges at two ends and a suspender body in the middle, and two ends of the suspender body are welded with the corresponding flanges respectively.

Furthermore, the adjustable support comprises a base, a screw rod and an upper supporting plate, the lower part of the base is respectively fixed on the upper side of the corresponding support trolley, the lower end of the screw rod is screwed into the base, the upper end of the screw rod is respectively connected with the corresponding upper supporting plate, and the upper supporting plate is respectively supported on the lower side of one end head of the rotor shaft of the generator or on the lower side of the rotor core. The supporting surface of the upper supporting plate is a V-shaped surface, and wheels at the bottoms of the first supporting trolley and the second supporting trolley are supported on the floor of the ship cabin.

The invention gradually moves the generator rotor out of the generator base stage by stage through the matching operation of the engine room travelling crane and the supporting trolley, thereby solving the problem of the generator rotor in the narrow and short ship engine room. The generator rotor can be maintained on site in the ship engine room, time and labor are saved, the maintenance efficiency of the ship generator set is obviously improved, and the maintenance cost is reduced.

Advantages and features of the present invention will be illustrated and explained by the following non-restrictive description of preferred embodiments thereof, given by way of example only with reference to the accompanying drawings.

Drawings

FIG. 1 is a process step diagram of step 1) of the present invention;

FIG. 2 is a process step diagram of step 2) of the present invention;

FIG. 3 is a process step diagram of step 3) of the present invention;

FIG. 4 is a process step diagram of step 4) of the present invention;

FIG. 5 is a process step diagram of step 5) of the present invention;

FIG. 6 is a process step diagram of step 6) of the present invention;

FIG. 7 is a process step diagram of step 7) of the present invention;

fig. 8 is an enlarged view of a direction a of fig. 7.

Detailed Description

The invention will be further explained with reference to the drawings and an embodiment in which the generator rotor of a ZFC6564-64E generator in a ship's cabin is moved out of the generator frame.

As shown in fig. 1, in the present embodiment, the diesel engine 100 and the generator 200 of the diesel generator set are fixed to a common underframe 300, and the common underframe 300 is fixed to a cabin floor 400. The diesel engine 100 and the generator 200 are connected through the coupler 500, so that the diesel engine 100 can drive the generator rotor 206 to rotate to generate electricity, and the electricity demand of the ship is met. 270mm from the right end of the generator 200 is a cabin ventilation layer 600, the distance from the axle center of the generator rotor 206 to the cabin ventilation layer 600 is 3000mm, and the horizontal and vertical movement spaces of the generator 200 are small. The total mass of the generator 200 is 6000kg, the total length of the generator rotor 206 is 2640mm, the mass is 2500kg, and the lifting capacity of the nacelle travelling crane 700 is 3000 kg. In such a narrow marine nacelle, and in a poor environment where the lifting capacity of the nacelle crane 700 is also significantly insufficient, the prior art conditions are not able to move the generator rotor 206 out of the generator base 202.

The steps of this example are as follows:

1) as shown in fig. 1, the coupler 500 fastener for connecting the output shaft of the diesel engine and the rotor shaft 2061 of the generator is firstly removed, then 2 fixing blocks 1 are respectively welded outside the two sides of one end, namely the left end, of the bottom of the generator base 201 facing the diesel engine 100 on the common underframe 300 at the bottom of the diesel generator set, bolts 2 with the specification of M36 are respectively screwed into the corresponding fixing blocks 1, the ends of the bolts 2 are abutted against the end surface of the left end of the bottom of the generator base 201, the generator 200 is pushed to move rightwards in the direction deviating from the diesel engine 100, the diesel engine output shaft end half-coupler 501 and the rotor shaft half-coupler 502 are separated from each other, and the connection between the.

2) As shown in fig. 2, firstly, hoisting ropes 701 of a nacelle travelling crane and hoisting ropes 901 of a chain block 900 temporarily mounted on a nacelle travelling beam 800 respectively hoist hoisting plates 207 at two ends of a generator base 201, then the two hoisting ropes move upwards simultaneously to hoist a generator 200 upwards to separate from a common underframe 300, then 3 round steel 6 with the diameter of 60mm serving as a roller are respectively placed between two sides of the bottom of the generator base 202 and the common underframe 300, then the two hoisting ropes move downwards simultaneously, and the bottom of the generator base 201 falls on the 6 round steel 6; the generator 200 is pushed, and the generator 200 moves away from the diesel engine 100 to the right under the rolling support of the 6 round steel bars 6.

3) As shown in fig. 2 and 3, bearing blocks 202, bearings 203, end caps 204, and generator fan 205 at both ends of generator rotor shaft 2061, respectively, are removed in preparation for removal of generator rotor 206.

4) As shown in fig. 4, the nacelle crane slings 701 are used to suspend the rotor shaft half-coupling 502 at the left end of the generator rotor shaft 2061, the adjustable support 31 on the first support cart 3 supports the right end of the generator rotor shaft 2061, then the nacelle crane 700 drives the nacelle crane slings 701 to move rightward in a direction away from the diesel engine 100, and the nacelle crane slings 701 and the adjustable support 31 on the first support cart 3 drive the generator rotor shaft 2061 to move rightward until the exciter core 2063 at the right end of the generator rotor 206 moves out of the generator base 201. The right end of the first boom 4 is then fixed to the end face of the rotor shaft coupling half 502.

5) The nacelle travelling crane slings 701 are moved to the first suspender 4, then the nacelle travelling crane 700 drives the slings 701 to move rightwards towards the direction away from the diesel engine 100, the nacelle travelling crane slings 701 and the adjustable supports 31 on the first support trolley 3 drive the generator rotor 206 to move outwards until the rotor core 2062 is partially moved out of the generator base 201, and then the right end of the second suspender 4 is fixedly connected with the left end of the first suspender 4.

6) As shown in fig. 6, the nacelle crane slings 701 are moved to the second boom 4, then the nacelle crane 700 drives the nacelle crane slings 701 to move rightward, the nacelle crane slings 701 and the adjustable supports 31 on the first support trolley 3 carry the generator rotor 206 outward until the rotor core 2062 completely moves out of the generator base 201, at this time, 2 adjustable supports 31 on the second support trolley 5 are used for supporting the lower side of the rotor core 2062, and the support position of the second support trolley 5 is at the right end of the rotor core 2062. The wheels 31 at the bottom of the first support trolley 3 and the second support trolley 5 are supported on the ship cabin floor 400.

7) As shown in fig. 7, the nacelle crane slings 701 are removed, the two booms 4 are removed, the rotor core 2062 is pushed, the generator rotor 206 is completely moved out of the generator base 201 under the support of the adjustable supports 31 of the first support trolley 3 and the 2 adjustable supports 31 of the second support trolley, and the support position of the second support trolley 5 is at the left end of the rotor core 2062. Generator rotor 206 is located on the underside of nacelle plenum 600.

As shown in fig. 6, the suspension rod 4 includes flanges 41 at two ends and a suspension rod body 42 in the middle, and two ends of the suspension rod body 42 are respectively welded to the corresponding flanges 41.

As shown in fig. 8, the adjustable support 31 includes a base 311, a screw 312 and an upper support plate 313, the lower portion of the base 311 is fixed on the upper side of the corresponding support cart, the lower end of the screw 312 is screwed into the base 311, the upper end of the screw 312 is connected with the upper support plate 312, and the upper support plate 313 is supported on the lower side of the end socket at one end of the generator rotor shaft 2061 or on the lower side of the rotor core 2062. The supporting surface of the upper supporting plate 313 is a V-shaped surface, which has a centering effect on the end of the generator rotor shaft 206. The wheels 32 at the bottom of the first support trolley 3 and the second support trolley 5 are supported on the ship cabin floor 400.

The invention solves the problem that the generator rotor is horizontally moved out of the generator base in a short and narrow ship engine room, and can also move out of the generator base in other narrow spaces.

In addition to the above embodiments, the present invention may have other embodiments, and any technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the claims of the present invention.