CN210350981U

CN210350981U - Inside dehumidification structure of stator frame

Info

Publication number: CN210350981U
Application number: CN201921200227.5U
Authority: CN
Inventors: 吴俊濠; 黎瑞涛; 杨峻
Original assignee: GUANGZHOU GUANGZHONG ENTERPRISE GROUP CORP
Current assignee: GUANGZHOU GUANGZHONG ENTERPRISE GROUP CORP
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-04-17
Anticipated expiration: 2029-07-26

Abstract

The utility model discloses an inside dehumidification structure of stator frame, relate to the motor structure field, be difficult to dismantle the problem of maintenance or change when damaging to the inside dehumidification structure of stator frame, provide following technical scheme, an inside dehumidification structure of stator frame, including the stator frame, be equipped with ohmic heating's dampproofing heater in the stator frame, the heating dampproofing ware is connected with the cable, and the one end that the heating dampproofing ware was kept away from to the cable is connected with the power, and the inner wall of stator frame can be dismantled and be connected with the mounting, and dampproofing heater surface is located to the mounting cover, reaches dampproofing heater demountable installation's purpose.

Description

Inside dehumidification structure of stator frame

Technical Field

The utility model relates to a generator structure field, more specifically say, it relates to an inside dehumidification structure of stator frame.

Background

In the working process of the generator, due to the instability of the working environment, the interior of the generator is easy to be invaded by moisture, and the internal parts of the generator are easily corroded or even damaged when being in a humid environment for a long time, so that the service life of the generator is influenced.

In general, an operator usually dehumidifies the interior of the generator by using two methods, namely a current drying method and a motor iron loss drying method. However, both methods have disadvantages, the current drying method is to introduce low-voltage current to the stator winding of the motor, the rotor is locked, the motor is dried by using the temperature generated by the loss of the motor, and because the rotor coil is supplied with direct current, the damage of residual magnetism exists, the direct current needs to be re-introduced for demagnetization, the consumed time is large, and the delay of grid connection time is caused; in the motor iron loss drying method, excitation coils are wound on a stator core (pass through a stator bore), a 380V (220V) alternating current power supply is connected, so that the stator core generates magnetic flux, the motor is dried by using temperature rise generated by eddy current loss of the core, part sleeves such as a rotor and the like need to be detached in the operation process, the operation is too complicated, and certain requirements are met for factory equipment.

Chinese patent with application number CN201821621941.7 discloses an anti-freezing and moisture-proof motor device, which is characterized in that a heating device is arranged on a rear cover of a motor, and the interior of the motor is dehumidified by heating in a humid environment. Although the dehumidification effect inside the motor is realized to a certain extent, the motor device is difficult to detach and take out from the motor at the heating device, and is difficult to detach, maintain or replace when the heating device is damaged.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide an inside dehumidification structure of stator frame has dampproofing heater demountable installation's advantage.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides an inside dehumidification structure of stator frame, includes the stator frame, be equipped with ohmic heating's dampproofing heater in the stator frame, heating dampproofing ware is connected with the cable, the cable is kept away from heating dampproofing ware's one end is connected with the power the inner wall of stator frame can be dismantled and be connected with the mounting, the mounting cover is located dampproofing heater surface.

By adopting the technical scheme, the moistureproof heater is arranged in the stator base, so that when dehumidification is needed to be carried out on the interior of the stator base, the moistureproof heater can generate heat and dehumidify the interior of the stator base through the power supply of the connecting cable. Compared with dehumidification through a current drying method and a motor iron loss drying method, the scheme energizes the moisture-proof heater through the cable, the dehumidification effect can be achieved without energizing and heating the rotor coil, and particularly when the motor is in a humid environment, the structure adopted by the scheme reduces the field installation process, so that the grid connection required time of an operator is reduced, and the grid connection speed is accelerated. Because the mounting can be dismantled with stator frame inner wall and be connected, should dismantle and connect and can set up to threaded connection, when damp proof heater need dismantle because of damage or other reasons, through rotatory threaded connection between release mounting and the stator frame to take out the mounting from stator frame inner wall, can take out damp proof heater.

Preferably, the power supply is arranged outside the stator base, a through hole is formed in the bottom of the stator base, and one end, far away from the moisture-proof heater, of the cable is connected with the power supply through the through hole.

By adopting the technical scheme, the power supply and the cable are arranged outside the stator base, the power supply which can be connected with the damp-proof heater outside the stator base realizes the dehumidification work inside the stator base, the operation steps of the internal structure of the stator base are reduced, and the influence of frequently opening the stator base on the work of other parts of the stator base is reduced.

Preferably, the outer wall of the stator base is provided with a terminal box base, and a switch for controlling the cable to be electrically connected with the power supply is arranged in the terminal box base.

Adopt above-mentioned technical scheme, control the circular telegram of cable through the switch in the terminal box seat, in addition, the terminal box seat plays the effect of accomodating to the cable, has reduced the direct probability that exposes at external environment of cable to reduce the influence of external environment to the cable, the terminal box seat sets up in the outer wall of stator frame, moves thereupon at the removal in-process terminal box seat of stator frame and cable, can use simple operation to the cable circular telegram.

Preferably, the opening of the terminal box base is connected with a terminal box plate.

By adopting the technical scheme, when the cable switch is not required to be operated, the opening of the junction box base is sealed by the junction box plate, so that the influence of the external environment on the cable is reduced, and the cable is protected; when the moisture-proof heater works, the influence of the outside on the electrification of the cable is reduced by sealing the junction box base by the junction box plate, and the working stability of the moisture-proof heater is maintained.

Preferably, the side wall of the junction box base is provided with a box hole for the cable to pass through, a connector is arranged in the box hole, and a sealing ring is arranged between the connector and the inner wall of the box hole.

Adopt above-mentioned technical scheme, the one end that dampproofing heater was kept away from to the cable is connected with the power through the box hole, and when using, the inner wall and the cable butt that connect, connect the surface and pass through the sealing washer joint in box hole inner wall. The connector has a limiting effect on the movement of the cable in the box hole, so that the situation that the cable is disconnected from the junction box base due to the fact that force is applied to the cable by outside carelessly in the operation process is reduced; the connection between the connector and the box hole can be disassembled by taking out the sealing ring, and when the width of the cable is different, the connectors with different inner diameters can be replaced, so that the limitation on the width of the cable is reduced; the sealing ring can be made of elastic materials such as rubber, the sealing ring plays a role in sealing the joint and the box hole, the connection between the joint and the box hole is enhanced, and the probability that the joint falls from the box hole is reduced.

Preferably, a fastening hole is formed in one end, far away from the junction box base, of the connector, a compression nut penetrates through the fastening hole, a threaded hole is formed in the outer wall of the junction box base, and the compression nut is in threaded connection with the threaded hole through the fastening hole.

By adopting the technical scheme, the connection between the connector and the terminal box base is strengthened through the compression nut, so that the probability that the connector falls from the box hole is reduced; meanwhile, the compression nut continuously applies force to the sealing ring in the process of being connected with the thread of the threaded hole, and the sealing effect of the sealing ring on the box hole is enhanced.

Preferably, a gasket is arranged between the stator base and the junction box base.

Adopt above-mentioned technical scheme, because stator frame outer wall and terminal box seat outer wall are the harder material of texture, the gasket plays the cushioning effect to between stator frame outer wall and the terminal box seat, all plays the guard action to stator frame and terminal box seat.

Preferably, the terminal of the terminal box base facing the terminal box plate is provided with a connecting groove, and the terminal box plate is provided with a protrusion matched with the connecting groove.

By adopting the technical scheme, when the junction box plate covers the junction box base, the protrusion enters the connecting groove, when the junction box plate generates a movement trend of separating from the junction box base, the protrusion generates a relative movement trend on the inner wall of the connecting groove, and the inner wall of the connecting groove limits the protrusion to move by the friction force generated on the surface of the protrusion, so that the junction box plate is limited from falling off from the junction box base.

Preferably, the spread groove orientation the outer direction of terminal box seat is opened there is the lockhole, the inner wall of lockhole is equipped with the lock axle, the surface orientation of lock axle the direction of spread groove is equipped with the touching piece, protruding orientation the locked groove has been opened to the side surface of lockhole, the surface of lock axle be equipped with the latch fitting that the locked groove matches, the latch fitting with all be equipped with magnet in the locked groove.

Adopt above-mentioned technical scheme, protruding when moving towards the spread groove in with the contact and drive the contact and move towards the spread groove bottom, the contact rotates thereupon at the in-process lock shaft of motion for the latch fitting gets into the locked groove through the lockhole, the magnet of latch fitting attracts mutually with the magnet magnetism of locked groove, makes the latch fitting be difficult to break away from the locked groove, and the arch is difficult to break away from in the spread groove promptly, thereby realizes the auto-lock of terminal box seat and terminal box board.

Preferably, the surface of the lock shaft is provided with a shifting block.

By adopting the technical scheme, an operator rotates the shifting block to separate the shifting block from the lock groove, and the contact part rotates and pushes the protrusion to separate from the connecting groove, so that the locking of the junction box base and the junction box plate can be released, and the junction box plate can be conveniently opened.

To sum up, the utility model discloses following beneficial effect has:

1. the damp-proof heater is fixed through the fixing piece, and the fixing piece is in threaded connection with the stator base, so that the damp-proof heater is detachably connected with the stator base, and the damp-proof heater is convenient to detach and mount;

2. the joint is fixed in the box hole through the sealing ring, so that the gap between the joint and the inner wall of the box hole is reduced, and the probability that the joint falls off and is lost from the box hole is reduced;

3. the force between the stator base and the terminal box base is buffered through the gasket, and the probability that the terminal box base extrudes and deforms the outer wall of the stator base when external force acts on the terminal box base is reduced.

Drawings

Fig. 1 is a schematic structural view of the internal dehumidifying structure of the stator frame of the present invention.

Fig. 2 is a schematic structural view of a terminal box base in the internal dehumidifying structure of the stator frame of the present invention.

Fig. 3 is an enlarged schematic view of a point a in fig. 2.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the damp-proof heating device comprises a stator base 1, a damp-proof heater 2, a fixing piece 3, a base through hole 4, a terminal box base 5, a terminal box plate 6, a first box hole 7, a second box hole 8, a connector 9, a sealing ring 10, a fastening hole 11, a compression nut 12, a threaded hole 13, a gasket 14, a connecting groove 15, a protrusion 16, a locking hole 17, a locking groove 18, a locking shaft 19, a contact piece 20, a locking piece 21 and a shifting block 22.

A dehumidification structure in a stator base comprises a stator base 1 of a motor, a dampproof heater 2 is arranged in the stator base 1, the rated voltage of the dampproof heater 2 is 220V, the rated power is 400W, the requirements of JB/T7836.1-2005 universal technical conditions for electric heaters for motors are met, a plurality of the dampproof heaters 2 are arranged along the inner wall of the stator base 1, and the dampproof heaters 2 are in a serpentine tube shape for improving dehumidification efficiency. The inner wall of stator frame 1 is equipped with mounting 3 of dampproofing heating pipe, and mounting 3 can set up to single pipe clamp, runs through in the single pipe clamp to be equipped with the screw, and the inner wall of stator frame 1 is equipped with the frame screw that matches with the screw, and the screw is through single pipe clamp and frame screw threaded connection to realize that single pipe clamp is connected with dismantling of stator frame 1, dampproofing heating pipe can dismantle the internal surface of connecting in stator frame 1 promptly.

As shown in fig. 2, a base through hole 4 is formed in the stator base 1, a terminal box base 5 is connected to the outer wall of the stator base 1, a first box hole 7 is formed in the bottom wall of the terminal box base 5 facing the stator base 1, the base through hole 4 is communicated with the first box hole 7, and a second through hole is formed in the side wall of the terminal box base 5. The stator frame 1 is equipped with the power of dampproofing heater 2 outward, and the end connection of dampproofing heater 2 has the cable, and the one end that the dampproofing heater 2 was kept away from to the cable runs through in proper order through frame through-hole 4, first box hole 7 and second box hole 8 and is connected with the power outside terminal box seat 5, is equipped with the switch of control cable and power intercommunication in the terminal box seat 5.

The joint 9 of cable is equipped with in the second box hole 8, and it is cylindric to connect 9, and the cable is with the inner wall interference fit who connects 9, and the outer wall cover that connects 9 is equipped with sealing washer 10, and sealing washer 10 sets up to rubber seal 10, connects 9 through sealing washer 10 joint in second box hole 8 inner wall. The junction box base 5 is provided with a threaded hole 13 along the periphery of the second box hole 8, the threaded hole 13 is connected with a compression nut 12 in a threaded mode, a fastening hole 11 is formed in the surface of the connector 9, the fastening hole 11 is communicated with the threaded hole 13, and the compression nut 12 penetrates through the fastening hole 11 along the axial length direction of the compression nut and is in threaded connection with the threaded hole 13.

In order to reduce the influence of the external environment on the cable in the terminal box base 5, a terminal box plate 6 is arranged at an opening of the terminal box base 5, and the terminal box base 5 is covered by the terminal box plate 6. A gasket 14 is arranged between the junction box base 5 and the stator base 1.

As shown in fig. 3, a connection slot 15 is formed in one end of the terminal box base 5 facing the terminal box plate 6, a locking hole 17 is formed in a side wall of the connection slot 15 facing the outside of the terminal box, the locking hole 17 penetrates through the side wall of the connection slot 15, a locking shaft 19 is arranged on an inner wall of the locking hole 17, a contact piece 20 is arranged on a surface of the locking shaft 19 facing the inside of the connection slot 15, a locking piece 21 is arranged on a surface of the locking shaft 19 facing the outside of the terminal box, and a shifting block 22 for rotating the locking shaft 19 is further arranged. The surface of terminal box board 6 is equipped with the arch 16 with connecting groove 15 matching, and the lateral wall surface that arch 16 faced lockhole 17 is equipped with locked groove 18, and latch fitting 21 uses lock axle 19 as the axle upset to get into locked groove 18 and match with it, and the tip that latch fitting 21 kept away from lock axle 19 all is equipped with magnet with locked groove 18.

When the junction box plate 6 is covered towards the junction box base 5, the protrusion 16 enters the connecting groove 15, the contact piece 20 is pushed in the connecting groove 15 to move towards the bottom of the connecting groove 15, the movement of the contact piece 20 drives the locking shaft 19 to rotate, the locking shaft 19 rotates to enable the locking piece 21 to enter the locking groove 18 through the locking hole 17, the magnet at the end part of the locking piece 21 is magnetically attracted with the magnet in the locking groove 18, the locking piece 21 is limited to be separated from the locking groove 18, namely, the protrusion 16 is limited to leave the connecting groove 15, and therefore self-locking of the junction box plate 6 and the junction box base 5 is achieved; when the terminal box plate 6 needs to be opened, the poking block 22 is applied with force to enable the magnet of the locking piece 21 to overcome the attraction force of the magnet in the locking groove 18, the poking block 22 is rotated to enable the locking piece 21 to be separated from the locking groove 18, at the moment, the contact piece 20 pushes the protrusion 16 outwards towards the terminal box base 5, the self-locking of the terminal box base 5 and the terminal box plate 6 is released, and then the terminal box plate 6 can be opened.

When the interior of the stator base 1 needs to be dehumidified, the junction box plate 6 is turned over, and a switch in the junction box base 5 is turned on to electrify the cable and the moisture-proof heater 2 and heat up the cable and the moisture-proof heater, so that the dehumidification effect is realized; when the damp-proof heater 2 is detached for maintenance or replacement, the stator base 1 is opened, the screw is rotated to remove the threaded connection between the screw and the screw hole of the base, so that the fixing of the fixing piece 3 on the damp-proof heater 2 is removed, and the damp-proof heater 2 can be taken out.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an inside dehumidification structure of stator frame, includes the stator frame, be equipped with ohmic heating's dampproofing heater in the stator frame, heating dampproofing ware is connected with the cable, the cable is kept away from heating dampproofing ware's one end is connected with power, its characterized in that: the inner wall of the stator base is detachably connected with a fixing piece, and the fixing piece is sleeved on the surface of the moisture-proof heater.

2. The internal dehumidifying structure of a stator frame according to claim 1, wherein: the power set up in outside the stator frame, open the bottom of stator frame has the through-hole, the cable is kept away from the one end of dampproofing heater is connected with the power through the through-hole.

3. The internal dehumidifying structure of a stator frame according to claim 1, wherein: and a junction box base is arranged on the outer wall of the stator base, and a switch for controlling the cable to be electrically connected with the power supply is arranged in the junction box base.

4. The internal dehumidifying structure of a stator frame according to claim 3, wherein: and the opening of the junction box base is connected with a junction box plate.

5. The internal dehumidifying structure of a stator frame according to claim 3, wherein: the side wall of the junction box base is provided with a box hole for the cable to pass through, a connector is arranged in the box hole, and a sealing ring is arranged between the connector and the inner wall of the box hole.

6. The internal dehumidifying structure of a stator frame according to claim 5, wherein: the connector is characterized in that one end, far away from the junction box base, of the connector is provided with a fastening hole, a compression nut penetrates through the fastening hole, the outer wall of the junction box base is provided with a threaded hole, and the compression nut is in threaded connection with the threaded hole through the fastening hole.

7. The internal dehumidifying structure of a stator frame according to claim 3, wherein: and a gasket is arranged between the stator base and the junction box base.

8. The internal dehumidifying structure of a stator frame according to claim 3, wherein: the terminal box base is opened with the spread groove towards the tip of terminal box board, the terminal box board be equipped with the arch of spread groove matching.

9. The internal dehumidifying structure of a stator frame according to claim 8, wherein: the spread groove orientation the outside direction of terminal box seat is opened there is the lockhole, the inner wall of lockhole is equipped with the lock axle, the surface orientation of lock axle the direction of spread groove is equipped with the touching piece, protruding orientation the locked groove has been opened to the side surface of lockhole, the surface of lock axle be equipped with the latch fitting that the locked groove matches, the latch fitting with all be equipped with magnet in the locked groove.

10. The internal dehumidifying structure of a stator frame according to claim 9, wherein: the surface of the lock shaft is provided with a shifting block.