CN216691937U

CN216691937U - Braking device capable of preventing fan from reversing

Info

Publication number: CN216691937U
Application number: CN202220183161.9U
Authority: CN
Inventors: 张泽山; 赵小亮; 杜成成; 齐殿寿; 杨凯; 赵玉琦
Original assignee: Gansu Power Investment Wuwei Thermal Power Co ltd
Current assignee: Gansu Power Investment Wuwei Thermal Power Co ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-06-07
Anticipated expiration: 2032-01-21

Abstract

The utility model provides a braking device capable of preventing a fan from reversing, which comprises an installation shell, wherein a braking plate is rotationally connected in the installation shell; a sliding groove is formed in the inner wall of the mounting shell, a wheel carrier is connected in the sliding groove in a sliding mode, the wheel carrier is rotatably connected with a tightening wheel, and the tightening wheel is used for tightening the brake plate; the mounting shell is in threaded connection with an ejector rod, and the ejector rod is abutted to the wheel carrier. The utility model aims at the problem of fan reverse rotation, and can enable an operator to conveniently complete the fan braking operation.

Description

Braking device capable of preventing fan from reversing

Technical Field

The present invention relates to a brake device, and more particularly, to a brake device capable of preventing a blower from being reversed.

Background

The application of the fan in industrial production is very wide, the fan is frequently used in the operation of a boiler of a power plant, the fan on a public flue inevitably shares a section of flue, and baffle doors are additionally arranged in the front and the back of the fan if the fan needs to be maintained and checked. However, the flapper door cannot be guaranteed to be absolutely tight, partial leakage exists, and just because the flapper door is not tightly sealed, when two fans are operated in parallel, when one fan is operated, the other fan is easy to be inverted.

The reversing of the fan causes the rotation direction of the impeller to be opposite to the direction of the rotating magnetic field of the motor stator, the starting current is larger, the starting current even exceeds the action current and time rectified by the current relay for the motor, and the current burns out the relay in serious cases, so that the fan cannot be started normally. Therefore, it is desirable to design a braking device that prevents the fan from reversing.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a braking device capable of preventing a fan from reversing, which aims at the problem of reversing of the fan and enables an operator to conveniently complete the braking operation of the fan.

The embodiment of the utility model is realized by the following technical scheme: a brake device capable of preventing a fan from reversing comprises a mounting shell, wherein a brake plate is rotationally connected in the mounting shell; a sliding groove is formed in the inner wall of the mounting shell, a wheel carrier is connected in the sliding groove in a sliding mode, the wheel carrier is rotatably connected with a tightening wheel, and the tightening wheel is used for tightening the brake plate; the mounting shell is in threaded connection with an ejector rod, and the ejector rod is abutted to the wheel carrier.

Furthermore, a rotating shaft is arranged between the inner walls of the mounting shell, and the brake plate is rotatably connected with the rotating shaft.

Further, the braking plate is provided with a front face and a back face, a wear-resistant rubber pad is arranged on the front face of the braking plate, and the tightening wheel abuts against the back face of the braking plate.

Furthermore, the wheel carrier is of a U-shaped structure with two side plates and a bottom plate, the jacking wheel is arranged between the two side plates, and the side plates rotatably support the jacking wheel; the ejector rod is abutted against the bottom plate.

Further, the outer wall of curb plate all is provided with the sliding block, sliding block and spout sliding connection.

Furthermore, a baffle ring is arranged on the bottom plate, a spring is arranged between the baffle ring and the inner wall of the mounting shell, and the spring is sleeved on the ejector rod.

Further, a turntable is arranged on the ejector rod and located outside the installation shell.

The technical scheme of the embodiment of the utility model at least has the following advantages and beneficial effects:

the utility model is provided with the brake plate, when the main shaft of the fan needs to be braked, the ejector rod tightly props the brake plate on the main shaft of the fan through the propping wheel, and the main shaft of the fan stops rotating due to the friction force between the main shaft and the brake plate, so that the aim of preventing the fan from reversing is further fulfilled; and when the ejector rod is withdrawn, the pressure between the brake plate and the main shaft of the fan is reduced or even cancelled, and the main shaft of the fan can normally rotate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a wheel frame structure disclosed in the present invention;

FIG. 3 is a schematic structural view of a mounting housing disclosed in the present invention in the direction A of FIG. 1;

icon: 1-mounting a housing; 2-a turntable; 3-a top rod; 4-a baffle ring; 5-a spring; 6-wheel carrier; 7-a tightening wheel; 8-wear-resistant rubber pad; 9-a brake plate; 10-a rotating shaft; 11-a main shaft; 12-a slide plate; 13-chute.

Detailed Description

In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the products of the present invention are used, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the device or element which is referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-3, a braking device capable of preventing a blower from reversing comprises a mounting shell 1, as shown in fig. 1, the mounting shell 1 is mounted on the side surface of a spindle 11, a braking plate 9 is rotatably connected in the mounting shell 1, the braking plate 9 can rotate, when the spindle 11 needs to be braked, the braking plate 9 rotates to be abutted against the spindle 11, and when the spindle 11 does not need to be braked, the braking plate 9 rotates to be separated from the spindle 11; a sliding groove 13 is formed in the inner wall of the mounting shell 1, a wheel carrier 6 is connected in the sliding groove 13 in a sliding mode, the wheel carrier 6 can slide along the sliding groove 13 under the action of the ejector rod 3, a jacking wheel 7 is connected to the wheel carrier 6 in a rotating mode, and the jacking wheel 7 is used for jacking the brake plate 9; the mounting shell 1 is in threaded connection with a mandril 3, and the mandril 3 is abutted against a wheel carrier 6.

It should be noted that, if the tightening wheel 7 is fixedly connected with the wheel carrier 6, when the tightening wheel 7 pushes the brake plate 9 to complete braking or brake release each time, the same position on the tightening wheel 7 is in contact with the brake plate 9, after long-time operation, the contact position between the tightening wheel 7 and the brake plate 9 is ground by friction between the tightening wheel 7 and the brake plate 9, further, a connecting line between the wheel center of the tightening wheel 7 and the center of the cross section of the main shaft 11 is not perpendicular to the brake plate 9, so that stress on the brake plate 9 is caused, and pressure applied to the surface of the main shaft 11 by the brake plate 9 is no longer positive pressure, thereby reducing braking effect; therefore, in order to avoid the contact of the fixed position on the tightening wheel 7 and the brake plate 9, the tightening wheel 7 is required to be rotationally connected with the wheel carrier 6, so that the long-term use effect is ensured.

Specifically, in the embodiment, in order to realize the rotational connection between the brake plate 9 and the mounting shell 1, a rotating shaft 10 is arranged between the inner walls of the mounting shell 1, the axis of the rotating shaft 10 is parallel to the axis of the spindle 11, and the brake plate 9 is rotationally connected with the rotating shaft 10.

In this embodiment, the braking plate 9 has a front surface and a back surface, the front surface of the braking plate 9 is provided with a wear-resistant rubber pad 8, the wear-resistant rubber pad 8 increases a friction factor of the braking plate 9 contacting with the spindle 11 on one hand, and on the other hand, when the braking plate 9 is required to brake under the condition that the spindle 11 rotates, the braking plate 9 contacts with the spindle 11 to generate an impact, the wear-resistant rubber can buffer part of the impact, and the tightening wheel 7 abuts against the back surface of the braking plate 9.

In the embodiment, in order to realize the rotational connection between the tightening wheel 7 and the wheel frame 6, the wheel frame 6 is a U-shaped structure with two side plates and a bottom plate, the tightening wheel 7 is positioned between the two side plates, and the side plates rotatably support the tightening wheel 7; the top rod 3 is abutted with the bottom plate.

In this embodiment, in order to realize the sliding connection between the wheel carrier 6 and the mounting shell 1, the outer walls of the side plates are provided with sliding blocks, and the sliding blocks are connected with the sliding grooves 13 in a sliding manner.

It should be noted that, because the tightening wheel 7 is rotatably connected with the wheel carrier 6, when the tightening wheel 7 contacts with the braking plate 9, the tightening wheel 7 rolls on the braking plate 9, the wheel carrier 6 is pushed by the push rod 3, and if there is no restriction of the sliding chute 13 and the sliding plate 12, the tightening wheel 7 rolls downwards along the braking plate 9, so that the tightening effect cannot be realized, and therefore, the sliding chute 13 and the sliding plate 12 also have the function of restricting the tightening wheel 7, and the stable braking effect is ensured.

As shown in fig. 1 and 3, in the present embodiment, as described above, under the condition that the main shaft 11 rotates, the surface of the brake plate 9 contacting the main shaft 11 is sprung open by the main shaft 11, but the brake plate 9 is restrained by the tightening wheel 7, so that the main shaft 11 applies the force or the impact force of the sprung open brake plate 9 to the ram 3, which in long-term operation may cause the threaded connection between the ram 3 and the mounting plate to fail; in order to solve the phenomenon, a baffle ring 4 is arranged on the bottom plate, a spring 5 is arranged between the baffle ring 4 and the inner wall of the mounting shell 1, the spring 5 is sleeved on the ejector rod 3, the spring 5 can buffer partial impact and transmit the impact to the mounting shell 1, and the impact on the ejector rod 3 is reduced.

In this embodiment, in order to facilitate the operation of an operator, a turntable 2 is arranged on the ejector rod 3, and the turntable 2 is located outside the installation shell 1.

In this embodiment, a braking device capable of preventing the fan from reversing works as follows:

when the main shaft 11 of the fan needs to be braked, an operator rotates the turntable 2 clockwise, the turntable 2 drives the ejector rod 3 to rotate clockwise, the ejector rod 3 pushes the wheel carrier 6 to slide towards the main shaft 11, the tightening wheel 7 gradually supports the brake plate 9, the front surface of the brake plate 9 is abutted against the surface of the main shaft 11 and has positive pressure, and therefore the main shaft 11 is braked under the action of friction force between the main shaft 11 and the brake plate 9, and the main shaft 11 is prevented from reversing;

when the main shaft 11 needs to rotate, an operator rotates the turntable 2 anticlockwise, the turntable 2 drives the ejector rod 3 to rotate anticlockwise, and the ejector rod 3 is not arranged on the tightening wheel 7 frame 6, so that the positive pressure between the brake plate 9 and the main shaft 11 is gradually reduced, the friction force is reduced, and the main shaft 11 can normally rotate until no friction force exists; the brake plate 9 is separated from the surface of the main shaft 11 under the action of self gravity.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A braking device capable of preventing a fan from reversing is characterized in that: the brake device comprises a mounting shell (1), wherein a brake plate (9) is rotationally connected in the mounting shell (1); a sliding groove (13) is formed in the inner wall of the mounting shell (1), a wheel carrier (6) is connected in the sliding groove (13) in a sliding mode, the wheel carrier (6) is rotatably connected with a jacking wheel (7), and the jacking wheel (7) is used for jacking a brake plate (9); the mounting shell (1) is in threaded connection with a mandril (3), and the mandril (3) is abutted against the wheel carrier (6).

2. The braking device capable of preventing the reverse rotation of a blower according to claim 1, wherein: a rotating shaft (10) is arranged between the inner walls of the mounting shell (1), and the brake plate (9) is rotatably connected with the rotating shaft (10).

3. The braking device capable of preventing the reverse rotation of a blower according to claim 2, wherein: the brake plate (9) is provided with a front surface and a back surface, the front surface of the brake plate (9) is provided with a wear-resistant rubber pad (8), and the jacking wheel (7) abuts against the back surface of the brake plate (9).

4. The braking device capable of preventing the reverse rotation of a blower according to claim 1, wherein: the wheel carrier (6) is of a U-shaped structure with two side plates and a bottom plate, the jacking wheel (7) is positioned between the two side plates, and the side plates rotatably support the jacking wheel (7); the ejector rod (3) is abutted against the bottom plate.

5. The braking device capable of preventing the fan from reversing according to claim 4, wherein: the outer wall of curb plate all is provided with the sliding block, sliding block and spout (13) sliding connection.

6. The brake device capable of preventing the fan from reversing according to claim 4, wherein: the bottom plate is provided with a retaining ring (4), a spring (5) is arranged between the retaining ring (4) and the inner wall of the mounting shell (1), and the ejector rod (3) is sleeved with the spring (5).

7. The braking device capable of preventing the reverse rotation of a blower according to claim 1, wherein: the ejector rod (3) is provided with a turntable (2), and the turntable (2) is located outside the mounting shell (1).