CN211508779U

CN211508779U - Sealing structure of motor rotating shaft

Info

Publication number: CN211508779U
Application number: CN202020585391.9U
Authority: CN
Inventors: 李晓; 颜海波; 林仁辉
Original assignee: Zhejiang Dayuan Pump Industry Co ltd
Current assignee: Zhejiang Dayuan Pump Industry Co ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2020-09-15
Anticipated expiration: 2030-04-17

Abstract

The utility model belongs to the technical field of the motor, refer in particular to a motor shaft's seal structure, establish the pivot end cover including pivot and cover, the cover is equipped with the bearing in the inboard pivot of end cover, and the pivot is passed through the bearing and is connected with the end cover rotation, and the pivot between end cover and the bearing is gone up the week and is equipped with the annular groove, and the inside callipers of annular groove is equipped with the sealing washer, the internal face of sealing washer and annular groove's bottom surface interference fit, be equipped with the annular rib on the sealing washer terminal surface, the outer terminal surface of annular rib is sealed with the interior. The utility model discloses the friction is little, the loss power is little, the pivot wearing and tearing are little, reduce the bearing and rock.

Description

Sealing structure of motor rotating shaft

The technical field is as follows:

the utility model belongs to the technical field of the motor, refer in particular to a motor shaft's seal structure.

Background art:

the inner side of an end cover of the motor is generally provided with a bearing to realize the rotating connection of the end cover and a rotating shaft, an axle hole for the rotating shaft to pass through is processed on the end cover, and a certain gap is required between the axle hole on the end cover and the rotating shaft in order to ensure the rotation of the rotating shaft. The problems that the bearing rusts and locks the rotating shaft, the coil is burnt by water and the like are solved in order to avoid foreign matters such as external water drops and dust from entering the inner cavity of the motor from the gap.

In the prior art, usually, the framework oil seal is used as a sealing element, the framework oil seal is sleeved on a rotating shaft between an end cover and a bearing, although the framework oil seal can be well waterproof, the radial sealing fit between the framework oil seal and the rotating shaft is large in tight friction force, the mechanical loss of a motor is large, the motor is difficult to start, the noise is large, and the rotating shaft is large in abrasion after being used for a long time. Meanwhile, in the working process of the motor, the framework oil seal can be in contact with the bearing when the vibration amplitude of the framework oil seal is large, so that the bearing shakes to influence the normal use of the motor.

The invention content is as follows:

the utility model aims at providing a seal structure of motor shaft, its friction is little, the loss power is little, the pivot wearing and tearing are little, reduce the bearing and rock.

The utility model discloses a realize like this:

the utility model provides a seal structure of motor shaft, includes the pivot and overlaps and establish the end cover in the pivot, and the cover is equipped with the bearing in the inboard pivot of end cover, and the pivot passes through the bearing to be connected with the end cover rotation, and the pivot upper week between end cover and the bearing is equipped with the annular groove, and the inside callipers of annular groove is equipped with the sealing washer, and the internal face of sealing washer and the bottom surface interference fit of annular groove, be equipped with the annular rib on the sealing washer terminal surface, the outer terminal surface of annular rib and the interior terminal surface contact seal of.

In the sealing structure of the motor rotating shaft, the outer end surface of the annular rib is a hemispherical surface.

In the above sealing structure for a motor rotating shaft, the inner side surface and/or the outer side surface of the annular rib is a conical surface, and the thickness D of the outer end of the annular rib is smaller than the thickness D of the inner end of the annular rib.

In the sealing structure of the motor rotating shaft, the annular rib and the sealing ring are coaxially arranged.

In the above sealing structure for a motor rotating shaft, the sealing ring and the annular rib are both made of rubber materials.

In the sealing structure of the motor rotating shaft, the sealing ring and the annular rib are of an integrated structure.

Compared with the prior art, the utility model outstanding advantage is:

1. the sealing ring of the utility model is axially sealed with the end cover, and the contact area between the outer end surface of the annular rib and the inner end surface of the end cover is small, so that the friction between the sealing ring and the end cover is small; meanwhile, the annular ribs are made of rubber materials, and the outer end faces of the annular ribs rebound during working, so that the contact friction force between the outer end faces of the annular ribs and the inner end faces of the end covers is reduced; the utility model has small friction force, small mechanical loss of the motor, easy starting of the motor and low noise;

2. the outer end surface of the annular rib is a hemispherical surface, so that the contact friction force is small; the inner side surface and/or the outer side surface of the annular rib are/is a conical surface, the thickness D of the outer end of the annular rib is smaller than the thickness D of the inner end of the annular rib, and the contact friction force between the sealing ring and the end cover is small.

3. The utility model has the advantages that the sealing ring rotates along with the rotating shaft, and the rotating shaft has small abrasion;

4. the utility model discloses a sealing washer card is established in the epaxial annular groove that rotates, carries out the axial to the sealing washer spacing, effectively prevents sealing washer axial displacement contact bearing simultaneously, and then effectively reduces rocking of bearing.

Description of the drawings:

fig. 1 is a cross-sectional view of the present invention;

FIG. 2 is an enlarged view at A of FIG. 1;

fig. 3 is a cross-sectional view of the seal ring of the present invention.

Reference numerals: 1. a rotating shaft; 2. an end cap; 3. a bearing; 4. a seal ring; 41. annular ribs.

The specific implementation mode is as follows:

the invention will now be further described with reference to specific embodiments, with reference to figures 1 to 3:

the utility model provides a seal structure of motor shaft, includes pivot 1 and the cover establishes at pivot 1 epaxial end cover 2, and the cover is equipped with bearing 3 on 2 inboard pivot 1 of end cover, and pivot 1 passes through bearing 3 to be connected with end cover 2 rotation, and 1 last week of pivot between end cover 2 and the bearing 3 is equipped with the annular groove, and the inside card of annular groove is equipped with sealing washer 4, and the internal face of sealing washer 4 and the bottom surface interference fit of annular groove, be equipped with annular rib 41 on the sealing washer 4 terminal surface, the outer terminal surface of annular rib 41 and the interior terminal surface contact of end cover 2 are sealed.

The utility model discloses a theory of operation: when the motor works, the sealing ring 4 is clamped in the annular groove of the rotating shaft 1 and axially limited, the inner wall surface of the sealing ring 4 is in interference fit with the bottom surface of the annular groove, the sealing ring 4 rotates at a high speed along with the rotating shaft 1, the outer end surface of the annular rib 41 is in contact seal with the inner end surface of the end cover 1, and foreign matters such as water drops and dust outside the end cover 2 are prevented from entering the inner cavity of the motor.

The annular groove carries out axial spacing to sealing washer 4, prevents effectively that sealing washer 4 axial displacement from contacting bearing 3, and then effectively reduces rocking of bearing 3.

Preferably, the outer end surface of the annular rib 41 is a hemispherical surface, so that the contact area between the outer end surface of the annular rib 41 and the inner end surface of the end cover 2 is reduced, and further, the contact friction force is reduced.

As shown in fig. 3, in order to ensure the strength of the annular rib 41 and the connection strength between the annular rib 41 and the sealing ring 4, and reduce the contact friction force between the sealing ring 4 and the end cap 2, the inner side surface and/or the outer side surface of the annular rib 41 is a conical surface, and the thickness D of the outer end of the annular rib 41 is smaller than the thickness D of the inner end.

Furthermore, the annular rib 41 is arranged coaxially with the sealing ring 4.

Preferably, the seal ring 4 and the annular rib 41 are both made of rubber materials, and when the seal ring works, the outer end surface of the annular rib 41 rebounds, so that the contact friction force between the outer end surface of the annular rib 41 and the inner end surface of the end cover 2 is reduced; .

The sealing ring 4 and the annular rib 41 can be of a split structure, and the sealing ring 4 and the annular rib 41 are bonded together. The sealing ring 4 and the annular bead 41 can also be of one-piece construction. In the present embodiment, the sealing ring 4 and the annular rib 41 are of an integral structure and made of a rubber material.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a motor shaft's seal structure, includes pivot (1) and cover establish end cover (2) on pivot (1), the cover is equipped with bearing (3) on pivot (1) of end cover (2) inboard, and pivot (1) is connected its characterized in that through bearing (3) and end cover (2) rotation: an annular groove is formed in the upper periphery of a rotating shaft (1) between an end cover (2) and a bearing (3), a sealing ring (4) is clamped in the annular groove, the inner wall surface of the sealing ring (4) is in interference fit with the bottom surface of the annular groove, an annular rib (41) is arranged on the end surface of the sealing ring (4), and the outer end surface of the annular rib (41) is in contact sealing with the inner end surface of the end cover (2).

2. A sealing structure of a rotating shaft of an electric machine according to claim 1, characterized in that: the outer end face of the annular rib (41) is a hemispherical face.

3. A sealing structure of a rotating shaft of an electric machine according to claim 1, characterized in that: the inner side surface and/or the outer side surface of the annular rib (41) are/is a conical surface, and the thickness of the outer end of the annular rib (41) is smaller than that of the inner end.

4. A sealing structure of a rotating shaft of an electric machine according to claim 1, characterized in that: the annular rib (41) and the sealing ring (4) are coaxially arranged.

5. A sealing structure of a rotating shaft of an electric machine according to claim 1, characterized in that: the sealing ring (4) and the annular rib (41) are both made of rubber materials.

6. A sealing structure of a rotating shaft of an electric machine according to claim 5, wherein: the sealing ring (4) and the annular rib (41) are of an integrated structure.