Shaft end sealing structure and mixing machine

Abstract

The utility model belongs to the technical field of mixers. The shaft end sealing structure is characterized by comprising an omega-shaped sealing block, the split type sealing plates and the omega-shaped sealing block are arranged at intervals, a sealing cavity is formed by a space defined by the split type sealing plates and the split type sealing plates on the two sides of the split type sealing plates, and a sealing filling material is placed in the sealing cavity; and the sealing cover plate is connected with the omega-shaped sealing block and is used for sealing the sealing cavity. The shaft end sealing structure is used for solving the technical problems that an existing shaft end sealing structure of the mixing machine is not ideal in sealing effect, the material leakage condition is more serious especially when fine powder premix is mixed, maintenance is difficult, and maintenance cost is high. The utility model further discloses a mixing machine which comprises the shaft end sealing structure.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of mixing machine for grain, powder, mortar, feed, specifically relates to a shaft end sealing structure of mixing machine. BACKGROUND

[0002] The shaft end sealing of the existing mixing machine mainly has packing sealing, reverse spiral sealing and end face air sealing. For the existing shaft end sealing mode, there are certain technical problems. 1. Packing sealing, friction with the main shaft generates heat, which causes aging of the sealing element and wear of the rotor, resulting in material leakage; premix is not suitable; the rotor is worn, the shaft end sealing is invalid, the rotor needs to be replaced, the cost is high; the shaft end sealing is damaged, the bearing and the speed reducer need to be disassembled and replaced, the maintenance difficulty is high. 2. Reverse spiral sealing, the premix with moisture absorption and liquid addition is easy to block the spiral groove and needs to be cleaned regularly; the packing also causes wear of the main shaft, which has the risk of replacing the shaft in the later period; the cost is high; the shaft end sealing is damaged, the bearing and the speed reducer need to be disassembled and replaced, the maintenance difficulty is high. 3. End face air sealing, friction between the sealing ring and the gland is easy to generate heat and aging, which causes material to enter the end face, wears the sealing ring and the gland; the sealing structure is complex, the sealing is difficult to replace; the cost is high; the shaft end sealing is damaged, the bearing and the speed reducer need to be disassembled and replaced, the maintenance difficulty is high. CONTENT OF THE UTILITY MODEL

[0003] The first object of the utility model is to provide a shaft end sealing structure to solve the technical problems of the existing mixing machine shaft end sealing structure, unsatisfactory sealing effect, especially more serious material leakage when mixing fine powder premix, and high maintenance difficulty and cost.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme, the shaft end sealing structure, characterized by comprising:

[0005] Ω-shaped sealing block;

[0006] Split type sealing plate, which is arranged at intervals with the Ω-shaped sealing block, the space surrounded by the split type sealing plate and the split type sealing plates on both sides of the Ω-shaped sealing block forms a sealing cavity, and sealing filling material is placed in the sealing cavity;

[0007] Sealing cover plate, which is connected with the Ω-shaped sealing block and used for closing the sealing cavity.

[0008] The utility model comprises a sealing cavity formed by the Ω-shaped sealing block and the split type sealing plate, and sealing filling material in the sealing cavity. The sealing filling material fills the sealing cavity and plays a sealing role. The utility model adopts the Ω-shaped sealing block, cooperates with the split type sealing plate, covers the rotating shaft, fills the sealing cavity with hemp yarn soaked in lithium-based lubricating grease as the sealing filling material, and fastens the gland with the sealing cover plate.

[0009] The utility model discloses make low cost, product structure is more compact, and installation is simple to detach, and maintenance difficulty is lower, and has good shaft end sealing effect.

[0010] To solve the technical problem of how the omega-shaped sealing block is implemented, the utility model adopts the following technical scheme, the omega-shaped sealing block is provided with a shaft mounting hole one on it;

[0011] The omega-shaped sealing block comprises a circular ring missing part and connecting parts arranged at the two ends of the circular ring missing part.

[0012] First connecting holes one are evenly arranged on the circular ring missing part.

[0013] Second connecting holes one are arranged on the connecting parts, and the second connecting holes one are arranged perpendicularly between the first connecting holes one.

[0014] The circular ring missing part is used for forming a sealing cavity and connecting the omega-shaped sealing block and the sealing plate.

[0015] To solve the technical problem of how the split sealing plate is implemented, the utility model adopts the following technical scheme, the split sealing plate is in an archway shape, and a shaft mounting hole two is arranged on the split sealing plate.

[0016] First connecting holes two are evenly arranged on the split sealing plate, and the first connecting holes two are matched with the first connecting holes one.

[0017] The split sealing plate comprises symmetrically arranged half sealing plates.

[0018] The utility model discloses that the sealing plate is designed as an archway split structure, and is convenient to disassemble and assemble.

[0019] To solve the technical problem of how the sealing accommodating cavity is implemented, the utility model adopts the following technical scheme, the outer diameter of the shaft mounting hole two is smaller than the outer diameter of the shaft mounting hole one.

[0020] To solve the technical problem of how the omega-shaped sealing block and the split sealing plate are connected, the utility model adopts the following technical scheme, first fasteners are arranged in the first connecting holes one of the omega-shaped sealing block and the first connecting holes two of the split sealing plate, the omega-shaped sealing block and the split sealing plate are connected, and connection is convenient.

[0021] To solve the technical problem of how the sealing cover plate and the sealing cavity are connected, the utility model adopts the following technical scheme, second connecting holes two are arranged at the two ends of the sealing cover plate respectively, the second connecting holes two are matched with the second connecting holes one and are provided with second fasteners, the sealing cover plate and the omega-shaped sealing block are connected, and connection is convenient.

[0022] To solve the technical problem of how to make the Ω-shaped sealing block and how to realize the sealing filling material, the utility model adopts the following technical scheme, the material quality of the Ω-shaped sealing block is nylon, the sealing filling material is hemp silk infiltrated by lithium base lubricating grease, the hemp silk infiltrated by lithium base lubricating grease is used as the filler, the sealing cavity is filled, and the sealing effect is achieved, and the manufacturing cost is low.

[0023] To solve the technical problem of how to make the split type sealing plate and the sealing cover plate, the utility model adopts the following technical scheme, the material quality of the split type sealing plate and the sealing cover plate is all iron plate, the utility model uses the nylon block and the iron sheet to make the partition layer, forms the sealing cavity, and the manufacturing cost is low.

[0024] The second object of the utility model is to provide a mixing machine, including mixing cavity, and the rotating shaft that is arranged on the mixing cavity, characterized by, the rotating shaft outside the mixing cavity is provided with the shaft end sealing structure of any one of the above.

[0025] To solve the technical problem of how the shaft end sealing structure is connected with the mixing machine, the utility model adopts the following technical scheme, the shaft end sealing structure is connected with the mixing cavity through the first fastener, and the shaft end sealing structure is connected with the mixing cavity of the mixing machine. DRAWINGS

[0026] Figure 1 It is the perspective view of the shaft end sealing structure of the utility model;

[0027] Figure 2 It is the front view of the shaft end sealing structure of the utility model;

[0028] Figure 3 It is the side view of the shaft end sealing structure of the utility model;

[0029] Figure 4 It is the top view of the shaft end sealing structure of the utility model;

[0030] Figure 5 It is the structure schematic view of the Ω-shaped sealing block of the shaft end sealing structure of the utility model;

[0031] Figure 6 It is the structure schematic view of the split type sealing plate of the shaft end sealing structure of the utility model;

[0032] Figure 7 It is the structure schematic view of the mixing machine of the utility model Figure 1 (The shaft end sealing structure is not equipped with the sealing cover plate);

[0033] Figure 8 It is the structure schematic view of the mixing machine of the utility model Figure 2 (The shaft end sealing structure is equipped with the sealing cover plate);

[0034] In the picture:

[0035] 10. Shaft end sealing structure;

[0036] 100Ω-shaped sealing block; 110 circular annular notch; 111 first connecting hole one; 120 connecting part; 121 second connecting hole one; 130 shaft mounting hole one;

[0037] 200 Split sealing plate; 210 Semi-sealing plate; 211 First connecting hole two; 220 Shaft mounting hole two;

[0038] 300 sealing cover plate;

[0039] 410 First fastener; 420 Second fastener;

[0040] 500 sealed cavity;

[0041] 60 Mixer; 610 Mixing Chamber; 620 Rotary Shaft. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings.

[0043] like Figures 1-4 As shown, the shaft end sealing structure 10 includes an Ω-shaped sealing block 100, a split sealing plate 200, and a sealing cover plate 300.

[0044] In one embodiment, such as Figure 5 As shown, the Ω-shaped sealing block 100 is provided with a shaft mounting hole 130. The Ω-shaped sealing block 100 includes an annular notch 110 and a connecting portion 120. The annular notch is used to form a sealing cavity and to connect the Ω-shaped sealing block and the sealing plate. The connecting portion is used to connect the sealing cover plate and the sealing cavity.

[0045] The annular notch 110 has four first connecting holes 111 evenly distributed circumferentially. Connecting portions 120 are provided at both ends of the annular notch 110. A second connecting hole 121 is provided on each connecting portion 120. There is one second connecting hole 121. The second connecting hole 121 is perpendicular to the first connecting hole 111.

[0046] In this embodiment, there are two Ω-shaped sealing blocks 100, and the material of the Ω-shaped sealing blocks 100 is nylon.

[0047] The split sealing plate 200 and the Ω-shaped sealing block 100 are spaced apart. In this embodiment, the number of split sealing plates 200 is three. In one embodiment, such as Figure 6As shown, the split sealing plate 200 has an arch-shaped structure. The split sealing plate 200 includes symmetrically arranged semi-sealing plates 210. This utility model designs the sealing plate with an arch-shaped split structure, which is convenient for disassembly and assembly.

[0048] The split sealing plate 200 is provided with a second shaft mounting hole 220. In one embodiment, the outer diameter of the second shaft mounting hole 220 is smaller than the outer diameter of the first shaft mounting hole 130. The difference in the outer diameters of the two shaft mounting holes forms a sealing cavity.

[0049] The split sealing plate is provided with evenly distributed first connecting holes 211, which mate with the first connecting holes 111. In this embodiment, the split sealing plate 200 is made of iron plate.

[0050] A first fastener 410 is provided in the first connection hole 111 of the Ω-shaped sealing block 100 and the first connection hole 211 of the split sealing plate 200 to realize the connection between the Ω-shaped sealing block 100 and the split sealing plate 200.

[0051] The space enclosed by the Ω-shaped sealing block 100 and the split sealing plates 200 on both sides forms a sealing cavity 500, and a sealing filler material is placed inside the sealing cavity 500. The sealing filler material is preferably hemp fibers impregnated with lithium-based grease. Using hemp fibers impregnated with lithium-based grease as filler to fill the sealing cavity achieves a sealing effect, and the manufacturing cost is low.

[0052] The sealing cover plate 300 has two second connecting holes at its two ends, which mate with the second connecting hole 1 and are fitted with second fasteners 420 to connect the sealing cover plate to the Ω-shaped sealing block. The sealing cover plate 300 is connected to the Ω-shaped sealing block 100 to seal the sealing cavity. In this embodiment, the sealing cover plate 300 is made of iron plate.

[0053] This utility model includes a sealing cavity formed by an Ω-shaped sealing block and a split sealing plate, and a sealing filling material inside the sealing cavity. The sealing filling material fills the sealing cavity and plays a sealing role. This utility model uses an Ω-shaped sealing block, in conjunction with a split sealing plate, to cover the rotating shaft, and then fills the sealing cavity with hemp fibers impregnated with lithium-based grease as the sealing filling material, and secures the cover with a sealing plate.

[0054] This invention has low manufacturing cost, a more compact product structure, simple installation and disassembly, low maintenance difficulty, and good shaft end sealing effect.

[0055] Example 2

[0056] like Figure 7 , Figure 8As shown, the mixer 60 includes a mixing chamber 610. A rotating shaft 620 is disposed on the mixing chamber 610, and a shaft end sealing structure 10 of any one of Embodiment 1 is disposed on the rotating shaft 620 outside the mixing chamber. Specifically, the shaft end sealing structure 10 is connected to the mixing chamber 610 by a first fastener 410, as follows:

[0057] During use, the components must be installed in layers. First, fit the outermost split-type sealing plate 200 onto the rotating shaft 620. Then, using the second fastener, pass it through the pre-drilled first connecting hole and sequentially insert the Ω-shaped sealing block 100, the middle split-type sealing plate 200, the Ω-shaped sealing block 100, and the inner split-type sealing plate 200. Next, install and secure the entire assembly onto the mixing chamber 610 of the mixer, completing the positioning and tightening. Stuff hemp fibers soaked in lithium-based grease into the two sealing cavities 500 formed by the Ω-shaped sealing block 100 and the split-type sealing plate 200, filling and pressing them tightly. Finally, install the sealing cover plate 300.

[0058] The shaft end sealing structure of this utility model mainly produces the following technical effects:

[0059] 1. Wide range of applications. It can replace packing seals, reverse spiral seals and end face gas seals, and is suitable for harsh working conditions (such as abnormal rotor wear). It still has good shaft end sealing effect when liquid is added and fine powder premixed materials are used.

[0060] 2. Easy installation. The modular design allows for installation and replacement without changing the rotor, bearings, or geared motor; replacement parts are directly provided.

[0061] 3. Low maintenance costs. Inspections are only required every six months; the simple structure results in low repair and replacement costs.

[0062] The above embodiments are only for illustrating the technical features and concept of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made according to the spirit and implementation of this utility model should be covered within the protection scope of this utility model.

Claims

1. A shaft end sealing structure, characterized in that it includes: Ω-shaped sealing block; A split sealing plate is spaced apart from the Ω-shaped sealing block. The space enclosed by the Ω-shaped sealing block and the split sealing plates on both sides forms a sealing cavity, and a sealing filling material is placed in the sealing cavity. A sealing cover plate, connected to the Ω-shaped sealing block, is used to close the sealing cavity.

2. The shaft end sealing structure according to claim 1, characterized in that, The Ω-shaped sealing block is provided with a shaft mounting hole; The Ω-shaped sealing block includes an annular notch and connecting portions provided at both ends of the annular notch; The circular notch is provided with first connecting holes evenly distributed on it; The connecting part is provided with a second connecting hole, which is perpendicular to the first connecting hole.

3. The shaft end sealing structure according to claim 2, characterized in that, The split sealing plate has an arch-shaped structure, and the split sealing plate is provided with a second shaft mounting hole; The split sealing plate is provided with first connecting holes two evenly distributed, and the first connecting holes two cooperate with the first connecting holes one; The split sealing plate includes symmetrically arranged semi-sealing plates.

4. The shaft end sealing structure according to claim 3, characterized in that, The outer diameter of the second shaft mounting hole is smaller than the outer diameter of the first shaft mounting hole.

5. The shaft end sealing structure according to claim 3, characterized in that, A first fastener is provided in the first connecting hole one of the Ω-shaped sealing block and the first connecting hole two of the split sealing plate to realize the connection between the Ω-shaped sealing block and the split sealing plate.

6. The shaft end sealing structure according to claim 2, characterized in that, The sealing cover plate is provided with a second connecting hole at each end. The second connecting hole cooperates with the second connecting hole and is provided with a second fastener to realize the connection between the sealing cover plate and the Ω-shaped sealing block.

7. The shaft end sealing structure according to claim 1, characterized in that, The Ω-shaped sealing block is made of nylon; the sealing filler material is hemp fiber impregnated with lithium-based grease.

8. The shaft end sealing structure according to claim 1, characterized in that, Both the split sealing plate and the sealing cover are made of iron plate.

9. A mixer, comprising a mixing chamber and a rotating shaft disposed on the mixing chamber, characterized in that, The shaft outside the mixing chamber is provided with a shaft end sealing structure as described in any one of claims 1-8.

10. The mixer according to claim 9, characterized in that, The shaft end sealing structure is connected to the mixing chamber via a first fastener.

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