CN217422184U - Bearing seal assembly and mixer - Google Patents

Abstract

The application relates to the technical field of automation equipment, and provides a bearing seal assembly and a stirrer, wherein, the bearing seal assembly comprises a mounting seat, a first bearing, a second bearing, a rotating shaft and a first plugging unit. The first bearing and the second bearing are arranged at intervals in the axial direction of the rotating shaft. The first plugging unit is located between the first bearing and the second bearing along the axial direction of the rotating shaft and used for plugging a gap between the mounting seat and the rotating shaft. By arranging the first blocking unit, the lubricating oil (grease) at the first bearing or the second bearing above the first blocking unit can be slowed down or even prevented from leaking/escaping downwards.

Description

Bearing seal assembly and mixer

Technical Field

The application relates to the technical field of automation equipment, in particular to a bearing sealing assembly and a stirring machine.

Background

In the lithium battery slurry mixing process, liquid raw materials and powder are added into a slurry mixing kettle of a slurry mixing machine, and the slurry is uniformly stirred through a stirring shaft and a dispersing shaft of the slurry mixing machine.

The dispersion axle rotates through a plurality of bearings and connects in the mount pad, and a plurality of bearings set up at dispersion axle's axial interval. In the using state, the bottom of the bearing positioned above is suspended. During long-term use, the lubricating oil (grease) at the upper bearing may leak/escape downward, causing the bearing to wear.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present disclosure provides a bearing sealing assembly and a blender, which can reduce or even prevent the lubricant (grease) at the bearing from leaking/escaping downward.

In order to solve the technical problem, a technical scheme adopted by the application is to provide a bearing sealing assembly, which comprises a mounting seat, a first bearing, a second bearing, a rotating shaft and a first plugging unit. The mount pad has the installation cavity, and the pivot is rotated through first bearing, second bearing and is installed in the installation cavity of mount pad, and first bearing and second bearing set up at the axial interval of pivot. The first plugging unit is annularly arranged on the rotating shaft, is positioned between the first bearing and the second bearing along the axial direction of the rotating shaft and is used for plugging a gap between the mounting seat and the rotating shaft.

In some embodiments of the present application, the first blocking unit includes a first barrier and a second barrier. The first blocking piece is sleeved on the rotating shaft and extends inwards from the inner wall surface of the mounting seat along the radial direction of the rotating shaft. The second blocking piece is sleeved on the rotating shaft, and the outer surface of the rotating shaft extends outwards along the radial direction of the rotating shaft. One of the inner edge of the first blocking piece and the outer edge of the second blocking piece is provided with a step, the step is annularly arranged on the rotating shaft and is recessed in the axial direction of the rotating shaft, and the other one of the inner edge of the first blocking piece and the outer edge of the second blocking piece is matched with the step in shape and is at least partially accommodated in the step to form a labyrinth sealing structure.

In some embodiments of the present application, the first barrier abuts an outer ring end face of the first bearing, and/or the second barrier abuts an inner ring end face of the first bearing.

In some embodiments of the present application, the mounting cavity includes a first sub-cavity and a second sub-cavity with different apertures to form a first annular step at a position between the first sub-cavity and the second sub-cavity, the first annular step has a first step surface, and an outer edge of the first blocking member is clamped between an outer ring end surface of the first bearing and the first step surface.

In some embodiments of the present application, the rotating shaft has a first shaft section and a second shaft section with different outer diameters to form a second annular step between the first shaft section and the second shaft section, the second annular step has a second step surface, and an inner edge of the second blocking member is clamped between an inner ring end surface of the first bearing and the second step surface.

In some embodiments of the present application, the bearing seal assembly comprises a second plugging unit and/or a third plugging unit. The second plugging unit is annularly arranged on the rotating shaft, is positioned on one side of the first bearing back to the second bearing and is used for plugging a gap between the mounting seat and the rotating shaft. The third plugging unit is annularly arranged on the rotating shaft, is positioned on one side of the second bearing, which is back to the first bearing, and is used for plugging a gap between the mounting seat and the rotating shaft.

In some embodiments of the present application, the second plugging unit includes a first cover plate, a first retainer ring, a second cover plate, and a second retainer ring. The first cover plate is sleeved on the rotating shaft and covers the opening at one end of the mounting seat. The rotating shaft is sleeved with the first retainer ring, and the first retainer ring extends from the inner edge of the first cover plate along the axial direction of the rotating shaft. The second cover plate is sleeved on the rotating shaft, and the outer surface of the rotating shaft extends outwards along the radial direction of the rotating shaft. The second retaining ring is sleeved on the rotating shaft, extends along the axial direction of the rotating shaft from the outer edge of the second cover plate, and is sleeved outside the first retaining ring. The first cover plate, the first retainer ring, the second cover plate and the second retainer ring are combined to form a labyrinth seal structure.

In some embodiments of the present application, the second cover plate is disposed on a side of the first cover plate facing away from the mounting seat along an axial direction of the rotating shaft.

In some embodiments of the present application, the third plugging unit includes a first mounting member, a second mounting member, and a sealing member. The rotating shaft is sleeved with the first mounting part, and the first mounting part is arranged on the mounting seat and is in sealing fit with the mounting seat. The rotating shaft is sleeved with the second mounting part, the second mounting part is in sealing fit with the rotating shaft, a cylindrical cavity is formed between the second mounting part and the first mounting part, and the first mounting part and the second mounting part are in concave-convex fit to form a labyrinth sealing structure, so that the cylindrical cavity is blocked. The sealing element is arranged in the cylindrical cavity and clamped between the first mounting element and the second mounting element, and the sealing element elastically extrudes the first mounting element and the second mounting element respectively and can rotate around the axis of the rotating shaft relative to the first mounting element and/or the second mounting element.

In order to solve the technical problem, the application also provides a stirrer which comprises the bearing sealing assembly, a transmission part and a stirring part. The transmission part is arranged on the rotating shaft in the bearing sealing assembly and used for driving the rotating shaft to rotate. The stirring piece is arranged on the rotating shaft and used for stirring.

The beneficial effect of this application is: be different from prior art, in the bearing seal assembly that this application provided, set up first shutoff unit. The first plugging unit is arranged on the rotating shaft in a looped mode, is located between the first bearing and the second bearing along the axial direction of the rotating shaft and is used for plugging a gap between the mounting seat and the rotating shaft. By arranging the first blocking unit, the lubricating oil (grease) at the first bearing or the second bearing is limited in a predetermined area, the lubricating oil (grease) at the first bearing or the second bearing above the first blocking unit can be slowed down or even avoided from leaking/escaping downwards, and the first bearing or the second bearing is slowed down or even avoided from being worn.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts. Wherein:

FIG. 1 is a cross-sectional view of one embodiment of the bearing seal assembly of the present application;

FIG. 2 is an enlarged view of detail B of FIG. 1;

FIG. 3 is an enlarged view of detail A of FIG. 1;

FIG. 4 is an enlarged view of detail C of FIG. 1;

FIG. 5 is a schematic view of an embodiment of a blender according to the present application.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying figures are described in detail below. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures associated with the present application are shown in the drawings, not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, B exists alone, and A and B exist at the same time.

Referring to fig. 1, fig. 1 is a cross-sectional view of an embodiment of a bearing seal assembly 100 according to the present application.

In an embodiment, the bearing seal assembly 100 includes a mounting seat 102, a first bearing 104, a second bearing 105, a rotating shaft 106, and a first plugging unit 113.

Mount 102 has a mounting cavity 150.

The rotating shaft 106 is rotatably mounted to the mounting cavity 150 of the mounting base 102 through the first bearing 104 and the second bearing 105. Specifically, first bearing 104 and second bearing 105 are both located within mounting cavity 150. The outer ring of the first bearing 104 is fixed to the mounting seat 102, and the inner ring of the first bearing 104 is fixedly sleeved on the rotating shaft 106. An outer ring of the second bearing 105 is fixed to the mounting seat 102, and an inner ring of the second bearing 105 is fixedly sleeved on the rotating shaft 106. In the embodiment shown in fig. 1, the number of the first bearings 104 is two, and they are arranged side by side in the axial direction of the rotating shaft 106. The number of the second bearings 105 is one. The number of the first bearings 104 and the second bearings 105 is not limited in the present application. In some embodiments, the number of the first bearings 104 may be one, the number of the second bearings 105 may be two, and the two second bearings 105 are arranged side by side in the axial direction of the rotating shaft 106. In some embodiments, the number of first bearings 104 and second bearings 105 is one each.

The first bearing 104 and the second bearing 105 are provided at intervals in the axial direction of the rotating shaft 106. In some embodiments, the first bearing 104 and the second bearing 105 are spaced in the axial direction of the rotating shaft 106, so as to prevent the rotating shaft 106 from swinging relative to the mounting seat 102, and ensure the stability of the rotating shaft 106 relative to the mounting seat 102.

The first blocking unit 113 is annularly disposed on the rotating shaft 106, and is located between the first bearing 104 and the second bearing 105 along the axial direction of the rotating shaft 106, and is used for blocking a gap between the mounting seat 102 and the rotating shaft 106.

Since the first bearing 104 and the second bearing 105 are arranged at an interval in the axial direction of the rotating shaft 106, in the case that the first blocking unit 113 is not provided, when the rotating shaft 106 is arranged vertically, for example, the first bearing 104 is located above the second bearing 105, the bottom of the first bearing 104 is suspended, and during long-term use, lubricating oil (grease) located at the first bearing 104 may leak/escape downward, causing abrasion of the first bearing 104.

In this embodiment, since the first blocking unit 113 is provided, when the rotating shaft 106 is vertically arranged, for example, the first bearing 104 is located above the second bearing 105, the first blocking unit 113 is blocked below the first bearing 104, and the lubricating oil (grease) leaking/escaping from the first bearing 104 is blocked by the first blocking unit 113 and is accumulated. When the first blocking unit 113 is disposed at a distance from the first bearing 104, the downward leakage/escape of the lubricating oil (grease) at the first bearing 104 can be slowed. When the first blocking unit 113 abuts against the first bearing 104, the lubricating oil (grease) of the first bearing 104 can be prevented from leaking/escaping downward.

Of course, it is possible that one of the first bearing 104 and the second bearing 105 is located above the other during use. Since the first blocking unit 113 is located between the first bearing 104 and the second bearing 105 in the axial direction of the rotating shaft 106, whether the first bearing 104 is located above the second bearing 105 or the second bearing 105 is located above the first bearing 104, by providing the first blocking unit 113, the downward leakage/escape of the lubricating oil (grease) at the first bearing 104 or the second bearing 105 can be reduced or even avoided, so that the wear of the first bearing 104 or the second bearing 105 can be reduced or even avoided.

Fig. 2 is an enlarged view of a partial view B in fig. 1, and the first plugging unit 113 will be described in detail with reference to fig. 1 and 2.

In some embodiments, the first blocking unit 113 includes a first barrier 112 and a second barrier 114. The first blocking member 112 and the second blocking member 114 are respectively fixed on the mounting seat 102 and the rotating shaft 106, and a labyrinth seal structure is formed therebetween. Labyrinth seals are seals having a plurality of tortuous chambers between the rotating and stationary parts to minimize leakage. Specifically, the first blocking member 112 and the second blocking member 114 form a gap L2 annularly disposed on the rotating shaft 106, so that the two can rotate relatively, and the gap L2 extends in a zigzag manner, so as to prevent the lubricating oil (grease) from passing through.

Specifically, the first blocking member 112 is sleeved on the rotating shaft 106 and extends inward from the inner wall surface of the mounting seat 102 along the radial direction of the rotating shaft 106. The second blocking member 114 is sleeved on the rotating shaft 106 and extends outward from the outer surface of the rotating shaft 106 along the radial direction of the rotating shaft 106. One of the inner edge of the first blocking member 112 and the outer edge of the second blocking member 114 has a step 124, the step 124 is disposed around the rotating shaft 106 and is recessed in the axial direction of the rotating shaft 106, and the other of the inner edge of the first blocking member 112 and the outer edge of the second blocking member 114 is shaped to match the step 124 and is at least partially received in the step 124 to form a labyrinth structure. In fig. 2, the outer edge of the second barrier 114 has a step 124, and the step 124 has a right-angled shape in cross section. The inner edge of first barrier 112 and the shape of step 124 match. The outer edge and the inner edge are both based on the radial direction of the rotating shaft 106, and are radially outward as the outer edge and radially inward as the inner edge.

In some embodiments, the first blocking unit 113 interferes with the first bearing 104. When the first bearing 104 is located above the second bearing 105, the first blocking unit 113 can prevent the lubricating oil (grease) at the first bearing 104 from leaking/escaping downward.

Specifically, first barrier 112 abuts an outer race end face of first bearing 104, and/or second barrier 114 abuts an inner race end face of first bearing 104.

The mounting cavity 150 includes a first sub-cavity 146 and a second sub-cavity 148 of different apertures to form a first annular step at a location between the first sub-cavity 146 and the second sub-cavity 148. The first annular step has a first step face 126. The outer edge of the first blocking member 112 is sandwiched between the outer ring end surface of the first bearing 104 and the first step surface 126.

The shaft 106 has a first shaft section 107 and a second shaft section 111 of different outer diameters to form a second annular step at a location between the first shaft section 107 and the second shaft section 111. The second annular step has a second step face 128. Wherein an inner edge of second barrier 114 is sandwiched between an inner race end face of first bearing 104 and second step face 128.

During assembly, the first and second barriers 112 and 114 are installed, and then the first bearing 104 is installed. The first blocking member 112 and the second blocking member 114 are pressed in the axial direction of the rotating shaft 106 by the first bearing 104, so that the first blocking member 112 is fixed on the mounting seat 102, and the second blocking member 114 is fixed on the rotating shaft 106.

Referring to fig. 1, in some embodiments, the bearing seal assembly 100 further includes a second plugging unit 109 and/or a third plugging unit 142.

The second blocking unit 109 is annularly arranged on the rotating shaft 106, and is located on the side of the first bearing 104 facing away from the second bearing 105, and is used for blocking a gap between the mounting seat 102 and the rotating shaft 106.

The third sealing unit 142 is disposed around the rotating shaft 106 and located on a side of the second bearing 105 facing away from the first bearing 104, and is used for sealing a gap between the mounting seat 102 and the rotating shaft 106.

By providing the second blocking unit 109 and the third blocking unit 142, impurities can be prevented from entering the areas where the first bearing 104 and the second bearing 105 are located. In the embodiment where the bearing seal assembly 100 is applied to a blender, the second and third plugging units 109 and 142 shield the first and second bearings 104 and 105 at the top and bottom ends, respectively, in a state of use of the blender.

Fig. 3 is an enlarged view of a partial view a in fig. 1, and the second plugging unit 109 will be described in detail with reference to fig. 1 and 3.

In some embodiments, the second plugging unit 109 comprises a bearing cap 117 and a dust cap 121.

A bearing cap 117 is removably mounted to one end of the mount 102 and cooperates with the mount 102 to secure the outer race of the first bearing 104. The dust cap 121 is fixedly disposed on the rotating shaft 106, and forms a labyrinth seal structure with the bearing cap 117. Specifically, a gap L1 is formed between the bearing cover 117 and the dust cover 121 and is disposed in the rotating shaft 106, so that the two can rotate relative to each other, and the gap L1 extends in a zigzag manner, so that dust can be prevented from entering the area where the first bearing 104 is located.

Specifically, the bearing cap 117 includes a first cover plate 116 and a first retainer ring 118. The first cover plate 116 is sleeved on the rotating shaft 106 and covers an opening at one end of the mounting seat 102. The first retainer ring 118 is disposed on the rotating shaft 106 and extends from the inner edge of the first cover plate 116 along the axial direction of the rotating shaft 106.

The dust cap 121 includes a second cover plate 120 and a second retainer ring 122. The second cover plate 120 is disposed on the rotating shaft 106, and extends outward from the outer surface of the rotating shaft 106 along the radial direction of the rotating shaft 106. The second retainer ring 122 is disposed on the rotating shaft 106, extends from an outer edge of the second cover plate 120 along an axial direction of the rotating shaft 106, and is disposed outside the first retainer ring 118.

The first cover plate 116, the first retainer ring 118, the second cover plate 120, and the second retainer ring 122 are combined to form a labyrinth structure.

In some embodiments, the second cover plate 120 is disposed on a side of the first cover plate 116 facing away from the mounting seat 102 along the axial direction of the rotating shaft 106. The arrangement is such that the second plugging unit 109 substantially forms a top convex shape, so that dust is less likely to collect above the second plugging unit 109.

Fig. 4 is an enlarged view of a partial view C in fig. 1, and the third plugging unit 142 will be described in detail with reference to fig. 1 and 4.

In some embodiments, third plugging unit 142 includes first mount 130 and second mount 132. The first mounting member 130 and the second mounting member 132 are respectively fixed on the mounting base 102 and the rotating shaft 106, and a labyrinth structure is formed therebetween. Specifically, the first mounting element 130 and the second mounting element 132 form a gap L3 around the rotating shaft 106, so that the two elements can rotate relative to each other, and the gap L3 extends in a zigzag manner, so that dust can be prevented from entering the area where the second bearing 105 is located.

Specifically, the first mounting member 130 is sleeved on the rotating shaft 106, disposed on the mounting seat 102, and is in sealing fit with the mounting seat 102. The second mounting member 132 is disposed on the shaft 106 and is in sealing engagement with the shaft 106. Second mounting element 132 and first mounting element 130 define a cylindrical cavity 152 therebetween. The first mounting element 130 and the second mounting element 132 are in concave-convex fit to form a labyrinth seal structure, so as to close off the cylindrical cavity 152.

More specifically, the first mounting member 130 includes a first cylinder 131 and a mounting portion 129. The mounting portion 129 is disposed outside the rotating shaft 106, and is fixedly disposed on an end surface of the bottom end of the mounting base 102, and a sealing ring is disposed between the mounting portion and the end surface for sealing engagement. The first cylinder 131 is sleeved outside the rotating shaft 106 and extends from the inner edge of the mounting portion 129 to the mounting base 102 along the axial direction of the rotating shaft 106. Second mounting member 132 includes a second barrel 133 and a mating portion 135. The second cylinder 133 extends along the axial direction of the rotating shaft 106, is fixedly sleeved on the rotating shaft 106, and is clamped with a sealing ring between the outer surface of the rotating shaft 106 for sealing engagement. The matching portion 135 is sleeved outside the rotating shaft 106 and extends outward from the outer surface of the second cylinder 133 along the radial direction of the rotating shaft 106. Wherein a cylindrical cavity 152 is formed between the first cylinder 131 and the second cylinder 133. The top end of the cylindrical cavity 152 communicates with the gap between the mount 102 and the shaft 106. The end surface of the first cylinder 131 facing away from the mounting seat 102 is provided with a groove 136 annularly arranged on the rotating shaft 106. The fitting portion 135 is provided with a protrusion 138 that is annularly provided to the rotating shaft 106 on a side of the rotating shaft 106 facing the mount 102 in the axial direction. The protrusion 138 is inserted into the groove 136 to form a labyrinth structure, so as to block one end of the cylindrical cavity 152, which faces away from the mounting seat 102.

To prevent the leakage of the lubricating oil (grease), the third blocking unit 142 further includes a sealing member 134. The seal 134 is provided in the cylindrical cavity 152 and interposed between the first mounting member 130 and the second mounting member 132. The sealing member 134 resiliently compresses the first and second mounting members 130 and 132, respectively, and is able to rotate relative to the first and/or second mounting members 130 and 132 about the axis of the rotary shaft 106. Specifically, the sealing element 134 is sleeved on the second barrel 133 in the second mounting element 132. The seal 134 may be an oil seal. In the illustrated embodiment, the number of the sealing members 134 is two, and the two sealing members 134 are arranged side by side in the axial direction of the rotating shaft 106.

In this embodiment, the seal 134 does not directly contact the shaft 106, thereby avoiding wear on the shaft 106.

To adjust the position of the sealing element 134 in the axial direction of the rotating shaft 106, the third plugging unit 142 further includes a gasket 154. The gasket 154 is received in the cylindrical cavity 152, sleeved outside the rotating shaft 106, and disposed below the sealing element 134.

Referring to fig. 5, fig. 5 is a schematic view of an embodiment of a blender according to the present application.

The application still provides a mixer, and the mixer can be used to the lithium cell thick liquids and mix.

The blender includes bearing seal assembly 100, transmission member 200, and blending member 300. The bearing seal assembly 100 is the bearing seal assembly 100 of any of the embodiments described above. The transmission member 200 is disposed on the rotating shaft 106 of the bearing seal assembly 100, and is used for driving the rotating shaft 106 to rotate. The stirring member 300 is disposed on the rotating shaft 106 in the bearing seal assembly 100 for stirring.

The agitator has all the technical features of the bearing seal assembly 100, and therefore has all the technical effects of the bearing seal assembly 100.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims (10)

1. A bearing seal assembly, comprising:

the mounting base is provided with a mounting cavity, the rotating shaft is rotatably mounted in the mounting cavity of the mounting base through the first bearing and the second bearing, and the first bearing and the second bearing are arranged at intervals in the axial direction of the rotating shaft;

the first plugging unit is annularly arranged on the rotating shaft, is positioned between the first bearing and the second bearing along the axial direction of the rotating shaft and is used for plugging a gap between the mounting seat and the rotating shaft.

2. The bearing seal assembly of claim 1 wherein the first plugging unit comprises:

the first blocking piece is sleeved on the rotating shaft and extends inwards from the inner wall surface of the mounting seat along the radial direction of the rotating shaft;

the second blocking piece is sleeved on the rotating shaft and extends outwards from the outer surface of the rotating shaft along the radial direction of the rotating shaft;

one of the inner edge of the first blocking piece and the outer edge of the second blocking piece is provided with a step, the step is annularly arranged on the rotating shaft and is recessed in the axial direction of the rotating shaft, and the other one of the inner edge of the first blocking piece and the outer edge of the second blocking piece is matched with the step in shape and is at least partially accommodated in the step to form a labyrinth sealing structure.

3. The bearing seal assembly of claim 2,

the first blocking piece is abutted against the end face of the outer ring of the first bearing, and/or

The second blocking piece is abutted to the end face of the inner ring of the first bearing.

4. The bearing seal assembly of claim 3,

the mounting cavity comprises a first sub-cavity and a second sub-cavity with different apertures to form a first annular step at a position between the first sub-cavity and the second sub-cavity, the first annular step has a first step surface,

the outer edge of the first blocking piece is clamped between the end face of the outer ring of the first bearing and the first step face.

5. The bearing seal assembly of claim 3,

the shaft has a first shaft section and a second shaft section of different outer diameters to form a second annular step at a location between the first shaft section and the second shaft section, the second annular step having a second step face,

the inner edge of the second barrier is clamped between the end face of the inner ring of the first bearing and the second stepped face.

6. The bearing seal assembly of claim 1 comprising:

the second plugging unit is arranged on the rotating shaft in a surrounding manner, is positioned on one side, back to the second bearing, of the first bearing and is used for plugging a gap between the mounting seat and the rotating shaft; and/or

And the third plugging unit is annularly arranged on the rotating shaft, is positioned on one side of the second bearing, which is back to the first bearing, and is used for plugging a gap between the mounting seat and the rotating shaft.

7. The bearing seal assembly of claim 6 wherein the second plugging unit comprises:

the first cover plate is sleeved on the rotating shaft and covers an opening at one end of the mounting seat;

the first retaining ring is sleeved on the rotating shaft and extends from the inner edge of the first cover plate along the axial direction of the rotating shaft;

the second cover plate is sleeved on the rotating shaft and extends outwards from the outer surface of the rotating shaft along the radial direction of the rotating shaft;

the second retaining ring is sleeved on the rotating shaft, extends from the outer edge of the second cover plate along the axial direction of the rotating shaft, and is sleeved outside the first retaining ring;

the first cover plate, the first retainer ring, the second cover plate and the second retainer ring are combined to form a labyrinth seal structure.

8. The bearing seal assembly of claim 7,

the second cover plate is arranged on one side, back to the mounting seat, of the first cover plate along the axial direction of the rotating shaft.

9. The bearing seal assembly of claim 6 wherein the third plugging unit comprises:

the first mounting piece is sleeved on the rotating shaft and arranged on the mounting seat, and the first mounting piece is in sealing fit with the mounting seat;

the second mounting piece is sleeved on the rotating shaft and is in sealing fit with the rotating shaft, a cylindrical cavity is formed between the second mounting piece and the first mounting piece, and the first mounting piece and the second mounting piece are in concave-convex fit to form a labyrinth sealing structure so as to seal the cylindrical cavity;

and the sealing element is arranged in the cylindrical cavity and is clamped between the first mounting element and the second mounting element, and the sealing element elastically extrudes the first mounting element and the second mounting element respectively and can rotate around the axis of the rotating shaft relative to the first mounting element and/or the second mounting element.

10. A blender, comprising:

the bearing seal assembly of any one of claims 1 to 9;

the transmission part is arranged on the rotating shaft in the bearing sealing assembly and is used for driving the rotating shaft to rotate;

the stirring piece is arranged on the rotating shaft and used for stirring.

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