Generator for rail welding vehicle

Abstract

The utility model discloses a generator for a track welding vehicle. The generator comprises a casing, a rotor, a rear end cover, a wire outlet box, an exciter, a permanent magnet machine and a current transformer. Ventilation gaps are respectively formed in the thickness middle parts of the two end parts of the rotor coil; the rear end cover comprises an outer flange ring, a rotating shaft supporting ring and a plurality of radial connecting rib plates, and an air hole is formed between every two adjacent radial connecting rib plates; the rear end faces of the middles of the radial connecting rib plates extend backwards to form supporting claws respectively. The wire outlet box comprises a lower box and an upper box; the lower box and the upper box abut against the rear end face of the outer flange ring of the rear end cover and are installed on the rear end face of the machine shell together with the rear end cover through bolts. The exciter is arranged at the rear part of the rotating shaft penetrating through the rotating shaft supporting ring of the rear end cover; the permanent magnet machine is mounted on the rear end surfaces of the plurality of supporting claws of the rear end cover; the current transformer is mounted in the upper box; and the three stator outgoing lines are led into the upper box through air holes in the upper part of the rear end cover. According to the utility model, the requirements of placement, heat dissipation and performance can be met.

Description

Technical Field

[0001] The utility model relates to a generator for an orbital welding vehicle. Background Art

[0002] An orbital welding vehicle is a device that can perform welding in multiple positions such as vertical welding, horizontal welding, and lateral welding. It is widely used in fields such as shipbuilding, bridge manufacturing, vehicle manufacturing, petroleum, and metal equipment, especially in occasions where high-quality and high-efficiency welding is required.

[0003] As an important component of the orbital welding vehicle, the generator is mainly used to provide stable power supply for the welding equipment and power for the drive system. Of course, the increasing demand for intelligent and multi-functional equipment in the current market also puts forward higher requirements for the power and stability of the generator.

[0004] Firstly, the generator must be able to provide stable power output. Unstable power supply may cause the welding equipment to malfunction, affecting the welding quality and efficiency. Secondly, the generator needs to have sufficient power to meet the power requirements of the welding equipment and other equipment. Insufficient power may cause the equipment to malfunction. Finally, the generator should be easy to maintain and service to reduce the downtime caused by failures.

[0005] In addition, in order to ensure normal startup after long-term storage, a permanent magnet machine needs to be installed on the generator, and components such as current transformers for detecting operating conditions need to be added. However, the space of the orbital welding vehicle is limited. The generators that meet the above requirements have problems such as too long length and some components cannot be installed in the outlet box. Moreover, in order not to affect the performance of the generator, a certain air intake space needs to be left at the tail of the generator to ensure internal heat dissipation of the generator. This results in that the existing models can only meet one of the requirements in terms of size and the need to add components such as permanent magnet machines and current transformers. Therefore, it is necessary to redesign a generator that can meet both functionality and size requirements. Summary of the Utility Model

[0006] The purpose of the utility model is to overcome the defects of the prior art and provide a generator for an orbital welding vehicle, which can not only meet the placement requirements of the generator but also ensure the heat dissipation and performance of the generator.

[0007] The purpose of the utility model is realized by the following technical solution: A generator for an orbital welding vehicle includes a cylindrical housing, a stator, a rotor, a front end cover, a rear end cover, an outlet box, an exciter, a permanent magnet machine, and a current transformer; the rotor includes a rotor core, a rotor coil, and a rotating shaft; wherein,

[0008] Both ends of the rotor coil are each provided with a ventilation gap in the middle of the thickness.

[0009] The rear end cover includes an outer flange ring, a rotating shaft support ring, and a number of radially connecting rib plates evenly distributed between the outer flange ring and the rotating shaft support ring. A ventilation hole is formed between every two adjacent radially connecting rib plates; an outlet box mounting hole is formed on the ring surface of the outer flange ring; at the rear end faces of the middles of a number of radially connecting rib plates, a support claw extends backward respectively, and a threaded blind hole is axially formed on the rear end face of each support claw.

[0010] The outlet box includes a lower box and an upper box; the lower box is a cuboid having a lower box bottom plate, two lower box side plates, a lower box top plate, a lower box front end plate, and a lower box rear end plate. A grounding copper bar is installed on the lower box bottom plate; a three-phase wiring copper bar is installed on the lower box top plate; the upper box is a cuboid cover body and includes two upper box side plates, an upper box top plate, an upper box front end plate, and an upper box rear end plate. The bottoms of the two upper box side plates are correspondingly installed on the two side surfaces of the lower box top plate; the bottoms of the upper box front end plate and the upper box rear end plate are correspondingly installed on the front end face and the rear end face of the lower box top plate.

[0011] The lower box front end plate and the upper box body end plate both lean against the rear end face of the outer flange ring of the rear end cover and are fixedly installed on the rear end face of the machine housing together with the rear end cover through bolts respectively.

[0012] The exciter is located inside the lower box of the outlet box and is installed at the rear part of the rotating shaft passing through the rotating shaft support ring of the rear end cover and leans against the rear end face of the rotating shaft support ring.

[0013] The permanent magnet machine is located inside the lower box and is installed on the rear end faces of a number of support claws of the rear end cover through a number of bolts.

[0014] The current transformer is located inside the upper box and is installed in the middle of the upper box front end plate.

[0015] The three lead-out wires of the stator are introduced into the upper box through a ventilation hole located at the upper part of the rear end cover and are correspondingly connected to the three-phase wiring copper bar respectively.

[0016] For the above-mentioned generator for rail welding vehicles, the thickness of the rotating shaft support ring of the rear end cover is greater than the thickness of the outer flange ring; a reinforcing rib is provided between the inner side surface of each support claw and the rear end face of the corresponding radially connecting rib plate.

[0017] For the above-mentioned generator for rail welding vehicles, a louver is formed on the lower box rear end plate.

[0018] The generator for rail welding vehicles of the present utility model has the following characteristics:

[0019] 1. By setting ventilation gaps at both ends of the rotor coil and increasing the number of enameled wires in the coil to ensure heat dissipation inside the generator and the performance of the generator, and shortening the overall length of the generator by a series of components such as shortening the lengths of the stator and rotor, it meets the placement requirements of the generator and facilitates future maintenance and repair, effectively reducing the downtime caused by faults.

[0020] 2. The outgoing line box and the rear end cover are redesigned, changing the installation position and structure of the outgoing line box, enabling more components to be installed. By changing the structure of the outgoing line box to increase its internal space, it makes the customization requirements of later customers possible. For example, adding a paralleling module, voltage transformer, capacitor, etc. in the outgoing line box leaves room for upgrading. The increase in the internal space of the outgoing line box and the increase in the distance between the exciter and the stator components also optimize the heat dissipation capacity inside the generator.

[0021] 3. The structure of the rear end cover is redesigned, and the permanent magnet machine can be installed on the rear end cover and located inside the outgoing line box. That is, the original installation of the exciter inside the stator is moved to the lower box of the outgoing line box, giving more heat dissipation space to the rotor, and no longer requiring a heat dissipation mesh cover to be installed at the rear of the machine shell, which can save production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the axial sectional view of the generator for track welding vehicle of the present utility model;

[0023] Figure 2 is the structural schematic diagram of the rotor coil in the generator for track welding vehicle of the present utility model;

[0024] Figure 3 is the rear view of the rear end cover in the generator for track welding vehicle of the present utility model;

[0025] Figure 4 is Figure 3 the view from A - A direction in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present utility model will be further described below in conjunction with the drawings.

[0027] Please refer to Figures 1 to 4 , the generator for track welding vehicle of the present utility model includes a cylindrical machine shell 1, a stator 2, a rotor 3, a front end cover 4, a rear end cover 5, an outgoing line box, an exciter 7, a permanent magnet machine 8 and a current transformer 9.

[0028] The rotor 3 includes a rotor core 31, a rotor coil 32, and a rotating shaft 30; the rotor coil 31 adopts an open winding process, that is, during the winding process of the rotor coil 31, when the rotor coil 32 is wound to half or a specific position, ventilation gaps 320 are left through spacers; when the generator is operating, the air inside the rotor can take away part of the heat through these ventilation gaps 320, thereby effectively reducing the temperature of the rotor and achieving the purpose of optimizing heat dissipation and improving operating efficiency.

[0029] The rear end cover 5 includes an outer flange ring 51, a rotating shaft support ring 50, and four radially connecting rib plates 52 evenly distributed between the outer flange ring 51 and the rotating shaft support ring 50. An air permeable hole is formed between every two adjacent radially connecting rib plates 52 to facilitate heat dissipation inside the generator; the thickness of the rotating shaft support ring 50 is greater than the thickness of the outer flange ring 51; an outlet box mounting hole 510 is formed on the ring surface of the outer flange ring 51; a support claw 53 extends backward from the middle rear end surface of each of the four radially connecting rib plates 52, and a reinforcing rib 530 is provided between the inner side surface of each support claw 53 and the rear end surface of the corresponding radially connecting rib plate 52; a threaded blind hole 530 is axially formed on the rear end surface of each support claw 53.

[0030] The outlet box includes a lower box 6A and an upper box 6B; among them,

[0031] The lower box 6A is a cuboid with a lower box bottom plate, two lower box side plates, a lower box top plate, a lower box front end plate, and a lower box rear end plate; a grounding copper bar 91 is installed on the lower box bottom plate; a three-phase wiring copper bar 92 is installed on the lower box top plate; a louver 60 is formed on the lower box rear end plate, and this louver 60 can not only dissipate the heat inside the generator but also dissipate the heat generated when the components inside the lower box 6A are operating.

[0032] The upper box 6B is a cuboid cover and includes two upper box side plates, an upper box top plate, an upper box front end plate, and an upper box rear end plate. The bottoms of the two upper box side plates are respectively installed on both side surfaces of the lower box top plate; the bottom of the upper box front end plate and the bottom of the upper box rear end plate are respectively installed on the front end surface and the rear end surface of the lower box top plate.

[0033] The lower box front end plate and the upper box body end plate both lean against the rear end surface of the outer flange ring 51 of the rear end cover 5 and are respectively fixed and installed on the rear end surface of the machine housing 1 together with the rear end cover 5 through bolts.

[0034] The exciter 7 is located inside the lower box 6A of the outlet box and is installed at the rear of the rotating shaft 30 passing through the rotating shaft support ring 50 of the rear end cover 5 and leans against the rear end surface of the rotating shaft support ring 50.

[0035] The permanent magnet machine 8 is arranged inside the lower box 6A and is located behind the exciter 7. The permanent magnet machine 8 is installed on the rear end surfaces of the four support claws 53 of the rear end cover 5 through four bolts.

[0036] The current transformer 9 is located inside the upper box 6B and is installed in the middle of the front end plate of the upper box;

[0037] The three lead-out wires of the stator 2 are introduced into the upper box 6B through a ventilation hole located in the upper part of the rear end cover 5 and are connected to the three-phase wiring copper bus 92 in a one-to-one correspondence.

[0038] For the generator for rail welding vehicle of the present utility model, the overall length of the rotating shaft 30 is also shortened by 80 mm. Specifically, the length of the stator core installation part is shortened by 55 mm, and the lengths of the fan installation part and the exciter installation part are shortened by 15 mm and 10 mm respectively towards the stator core installation part. The length of the machine shell 1 is shortened by 70 mm. The shortened dimension of the machine shell 1 comes from 55 mm at the iron core installation part and 15 mm at the fan installation part. Since the length of the machine shell 1 is shortened, correspondingly, the lengths of the stator core and the stator coil both need to be shortened. After calculation, both ends of the stator coil need to be shortened by 7 mm each. This adjustment is based on the limitation of the internal space of the generator. Since the shortening of the machine shell 1 results in a smaller distance from the fan to the stator core, the originally long stator coil will collide with other components inside the machine shell. At the same time, because the shortening of the stator coil will cause a decline in the performance of the generator, in order to make up for this loss, the original 45 enameled wires are increased to 49, and the performance of the generator is improved by increasing the number of cables. Adding a small amount of enameled wires will not change the winding process and method, and the change in the size of the stator can also be ignored.

[0039] The cuboid structure of the outlet box also provides as many choices as possible for the installation position of the voltage regulator later. No matter which side the customer's control cabinet is on, or if the left and right spaces are limited and it needs to be installed on the front and rear end plates, the voltage regulator can have a suitable installation position. It can be seen that there is still a lot of space left in the upper box 6B. In addition to installing the current transformer 9, upgrade space is left for meeting different customer requirements in the future, such as paralleling modules, voltage transformers, capacitors, etc. The protective cover of the permanent magnet machine 8 in the lower box 6A is also removed, and the heat dissipation capacity is improved. At the same time, compared with the original size of the generator, the length of this kind of outlet box design does not increase much. The side plates of the upper box 6B and the lower box 6A can be removed separately, so that it is not necessary to lift the whole generator out of the carriage and then remove the cover plate of the outlet box to check the internal situation. The side plates can be directly removed in the carriage to check the internal situation, which facilitates future maintenance and repair.

[0040] The generator for rail welding vehicle of the present utility model meets the placement requirements, facilitates future maintenance and repair, and can effectively reduce the downtime caused by faults. The newly designed outlet box and rear end cover can effectively increase the heat dissipation capacity and can also be customized according to different functions required by customers.

[0041] The above embodiments are only for illustrating the present utility model and not for limiting the present utility model. Those skilled in the relevant technical fields can also make various changes or modifications without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions should also fall within the scope of the present utility model and should be defined by each claim.

Claims

1. A generator for a rail welding vehicle, comprising a cylindrical casing, a stator, a rotor, a front cover, a rear cover, an outlet box, an exciter, a permanent magnet machine and a current transformer; the rotor comprises a rotor core, a rotor coil and a rotating shaft; characterized in that, The two ends of the rotor coil are each provided with a ventilation gap in the middle of the thickness; The rear end cover comprises an outer flange ring, a rotating shaft support ring and a plurality of radial connection ribs evenly connected between the outer flange ring and the rotating shaft support ring, and a vent hole is formed between every two adjacent radial connection ribs; a terminal box mounting hole is provided on the annular surface of the outer flange ring; a supporting claw is extended backwards on the middle rear end surface of the plurality of radial connection ribs, and a threaded blind hole is axially provided on the rear end surface of each supporting claw; The outlet box comprises a lower box and an upper box; the lower box is a rectangular parallelepiped having a lower box bottom plate, two lower box side plates, a lower box top plate, a lower box front end plate and a lower box rear end plate, and a grounding copper bar is installed on the lower box bottom plate; a three-phase wiring copper bar is installed on the lower box top plate; the upper box is a rectangular parallelepiped cover and comprises two upper box side plates, an upper box top plate, an upper box front end plate and an upper box rear end plate, and the bottoms of the two upper box side plates are correspondingly installed on the two side surfaces of the lower box top plate; the bottom of the upper box front end plate and the bottom of the upper box rear end plate are correspondingly installed on the front end surface and the rear end surface of the lower box top plate; The front end plate of the lower box and the end plate of the upper box body are both against the rear end surface of the outer flange ring of the rear end cover and are respectively fixedly mounted on the rear end surface of the casing together with the rear end cover by bolts; The exciter is located in the lower box of the outlet box and is installed at the rear of the rotating shaft of the rotating shaft support ring passing through the rear end cover and against the rear end surface of the rotating shaft support ring; The permanent magnet motor is located in the lower box and is mounted on the rear end surface of the plurality of supporting claws of the rear end cover by means of a plurality of bolts; The current transformer is located in the upper box and installed in the middle of the front end plate of the upper box; The three lead wires of the stator are introduced into the upper box through a vent hole located at the upper part of the rear end cover and are connected to the three-phase wiring copper bars one by one.

2. The rail welding vehicle generator according to claim 1, characterized in that: The thickness of the rotating shaft support ring of the rear end cover is greater than the thickness of the outer flange ring; reinforcing ribs are arranged between the inner side surface of each supporting claw and the rear end surface of the corresponding radial connecting rib plate.

3. The rail welding vehicle generator according to claim 1, characterized in that: A shutter is arranged on the rear end plate of the lower box.

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