Sealing structure of hot melt adhesive mixer

Abstract

The utility model belongs to the technical field of sealing structure, and specifically relates to a sealing structure of a hot melt adhesive mixer, including a mixing shaft and a sealing sleeve, the sealing sleeve is sleeved on the mixing shaft from top to bottom through a sealing ring 1, a bearing, and a sealing ring 2 in sequence, and the sealing sleeve is provided with an annular groove 1, an annular groove 2, and an annular groove 3, and the cross section of the annular groove 1 is T-shaped. The beneficial effects of the utility model are as follows: when the hot melt adhesive mixer is evacuated, the arc-shaped elastic part of the sealing ring 2 stretches and presses to both sides under the action of force, so that the sealing ring 2 has better sealing performance; when the hot melt adhesive mixer is not evacuated, the arc-shaped elastic part of the sealing ring 2 will not stretch and press to both sides, reducing the wear of the sealing ring 2; both sealing rings are provided with a sealing protrusion ring group, which improves the sealing performance of the sealing structure of the hot melt adhesive mixer; the closed annular cavity can store grease, increase the lubricity between the sealing ring and the mixing shaft and the sealing sleeve, and reduce the wear of the sealing ring.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing structures, and in particular relates to a sealing structure of a hot melt adhesive mixer. Background Art

[0002] When a hot melt adhesive mixer prepares hot melt adhesive, it is necessary to evacuate the hot melt adhesive to remove bubbles, so that the prepared hot melt adhesive is more delicate. However, when the hot melt adhesive mixer is evacuated, oil and air leakage will occur around the stirring shaft, which will affect the purity and fineness of the hot melt adhesive, and even cause the hot melt adhesive to lose its original chemical properties. In addition, the sealing ring needs to be more closely in contact with the stirring shaft and sleeve under vacuum conditions, which causes severe wear of the sealing ring and reduces the service life of the sealing ring. Therefore, a sealing ring with a long service life and a sealing structure for a hot melt adhesive mixer that avoids oil and air leakage around the stirring shaft is particularly important. Utility Model Content

[0003] Aiming at the problems that the sealing ring of the hot melt adhesive mixer is seriously worn when the hot melt adhesive mixer is vacuumed, and oil and air leakage occur around the stirring shaft, the utility model provides a sealing structure of the hot melt adhesive mixer.

[0004] The utility model relates to a sealing structure of a hot melt adhesive mixer, the sealing structure comprising a stirring shaft and a sealing sleeve, the sealing sleeve being sleeved on the stirring shaft, the connecting position between the stirring shaft and the sealing sleeve being provided with a sealing ring 1, a bearing, and a sealing ring 2 in sequence from top to bottom, the sealing sleeve being provided with an annular groove 1, annular groove 2, and annular groove 3, the cross section of the annular groove 1 being T-shaped;

[0005] The sealing ring 1 is provided with an upper lip 1, a lower lip 1, an upper lip 2, a lower lip 2, an upper lip 3 and a lower lip 3 which abut against the stirring shaft; the abutting positions of the upper lip 1, the lower lip 1, the upper lip 2, the lower lip 2, the upper lip 3 and the lower lip 3 with the stirring shaft are all provided with a sealing protrusion ring group 1; the side of the sealing ring 1 away from the stirring shaft is meshed with the annular groove 1; the inner ring of the bearing is fixedly connected to the stirring shaft, and the outer ring of the bearing is embedded in the annular groove 2 and fixedly connected to the sealing sleeve; The sealing ring 2 is provided with inner lip 1 and inner lip 2 from top to bottom to abut against the stirring shaft; the abutting positions of the inner lip 1 and inner lip 2 with the stirring shaft are both provided with sealing protrusion ring group 2, and the side of the sealing ring 2 away from the stirring shaft is embedded in the annular groove 3, and the sealing ring 2 is provided with outer lip 1 and outer lip 2 from top to bottom to abut against the sealing sleeve in the annular groove 3, and the abutting positions of the outer lip 1 and outer lip 2 with the sealing sleeve are both provided with the sealing protrusion ring group 2.

[0006] Preferably, a receiving groove 1 is opened between the inner lip 1 and the outer lip 1, and a spring elastic part, an annular elastic part and an arc-shaped elastic part are arranged in the receiving groove 1. The spring elastic part is fixedly connected to the bottom of the receiving groove 1, and the side of the spring elastic part away from the bottom of the receiving groove 1 is fixedly connected to the annular elastic part, the two sides of the annular elastic part are abutted against the receiving groove 1, and the side of the annular elastic part away from the spring elastic part is fixedly connected to the arc-shaped elastic part.

[0007] Preferably, the inner sides of the inner lip 1 and the outer lip 1 are both provided with a raised limiting structure, and the two ends of the arc-shaped elastic member are against the connection between the limiting structure and the accommodating groove 1, and the two ends of the arc-shaped elastic member are glued to the accommodating groove 1. The opening of the arc-shaped elastic member points to the outside of the accommodating groove 1, and a closed annular channel is formed between the arc-shaped elastic member and the accommodating groove 1.

[0008] Preferably, the arc-shaped elastic member is a composite elastic member, which comprises an engineering plastic outer layer and an elastic metal inner layer from outside to inside, and the annular elastic member is an elastic metal ring.

[0009] Prioritize, a accommodating groove 2 is opened between the inner lip 2 and the outer lip 2, a accommodating groove 3 is opened between the upper lip 1 and the lower lip 1, a accommodating groove 4 is opened between the upper lip 2 and the lower lip 2, and a accommodating groove 5 is opened between the upper lip 3 and the lower lip 3. The internal structures of accommodating grooves 2, 3, 4 and 5 are the same as those of accommodating groove 1.

[0010] Prioritize, the upper lip 1, arc-shaped elastic part, lower lip 1 of the sealing ring 1 and the stirring shaft form a closed annular cavity 1, the upper lip 2, arc-shaped elastic part, lower lip 2 of the sealing ring 1 and the stirring shaft form a closed annular cavity 2, and the upper lip 3, arc-shaped elastic part, lower lip 3 of the sealing ring 1 and the stirring shaft form a closed annular cavity 3.

[0011] Preferably, a closed annular cavity four is provided between the sealing ring two and the stirring shaft, and a closed annular cavity five is provided between the sealing ring two and the sealing sleeve.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] Compared with the prior art, the sealing structure of the hot melt adhesive mixer of the utility model is used.

[0014] (1) A closed annular channel is formed between the arc-shaped elastic part and the accommodating groove. When the hot melt adhesive mixer is evacuated, a pressure difference is generated between the air inside and outside the arc-shaped elastic part of the sealing ring 2, which generates an outward force on the arc-shaped elastic part of the sealing ring 2, so that the arc-shaped elastic part of the sealing ring 2 stretches and presses to both sides under the action of the force, thereby increasing the friction between the inner and outer lips of the sealing ring 2 and the stirring shaft and the sealing sleeve. Therefore, the sealing ring 2 has better sealing performance when the mixer is evacuated, avoiding air leakage of the hot melt adhesive mixer, and making the upper structure of the sealing ring 2 bear less pressure when evacuating, thereby avoiding oil leakage of the hot melt adhesive machine;

[0015] (2) When the hot melt adhesive mixer is not vacuumed, the pressure difference between the inner and outer sides of the arc-shaped elastic part of the sealing ring 2 is reduced. At this time, the arc-shaped elastic part of the sealing ring 2 will not stretch and press on both sides, and the friction between the inner and outer lips of the sealing ring 2 and the stirring shaft and the sealing sleeve is reduced, thereby reducing the wear of the sealing ring 2 and increasing the service life of the sealing ring 2;

[0016] (3) The two sealing rings are provided with sealing protrusion ring groups at the contact positions with the stirring shaft and the sealing sleeve, which increases the sealing performance between the two sealing rings and the stirring shaft and the sealing sleeve; thereby improving the sealing performance of the sealing structure of the hot melt adhesive mixer;

[0017] (4) The sealing ring 1 and the annular groove 1 of the sealing sleeve are meshed, which improves the sealing performance between the sealing ring 1 and the sealing sleeve and avoids the oil leakage and air leakage problems of the hot melt adhesive mixer;

[0018] (5) The closed annular cavity can store grease, which can prevent the hot melt adhesive mixer from leaking oil on the one hand, and increase the lubricity between the two sealing rings and the stirring shaft and sealing sleeve on the other hand, thereby reducing the wear of the two sealing rings and increasing the service life of the two sealing rings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following is a brief introduction to the drawings required for describing the embodiment:

[0020] Figure 1 This is a schematic diagram of the sealing structure of the hot melt adhesive mixer provided in Example 1.

[0021] Figure 2 Provided for Example 1 Figure 1 A magnified image of

[0022] Figure 3 Provided for Example 1 Figure 1 The enlarged view of point B,

[0023] Figure 4 Provided for Example 1 Figure 1 The enlarged view of point C,

[0024] Figure 5 Provided for Example 1 Figure 1 Enlarged view of point D.

[0025] Description of reference numerals:

[0026] 1—Agitator shaft, 2—Sealing sleeve, 3—Sealing ring 1, 4—Bearing, 5—Sealing ring 2, 6—Annular groove 1, 7—Annular groove 2, 8—Annular groove 3, 9—Upper lip 1, 10—Lower lip 1, 11—Upper lip 2, 12—Lower lip 2, 13—Upper lip 3, 14—Lower lip 3, 15—Sealing protrusion ring group 1, 16—Inner lip 1, 17—Inner lip 2, 18—Outer lip 1, 19—Outer lip 2, 20— —Sealing protrusion ring group 2, 21—accommodating groove 1, 22—spring elastic member, 23—annular elastic member, 24—arc-shaped elastic member, 25—limiting structure, 26—accommodating groove 2, 27—accommodating groove 3, 28—accommodating groove 4, 29—accommodating groove 5, 30—enclosed annular cavity 1, 31—enclosed annular cavity 2, 32—enclosed annular cavity 3, 33—enclosed annular cavity 4, 34—enclosed annular cavity 5. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0029] Example 1

[0030] Combine the following Figure 1-Figure 5 The utility model is further described as follows: Figure 1-Figure 5 The sealing structure of a hot melt adhesive mixer is shown, and the sealing structure includes a stirring shaft 1 and a sealing sleeve 2. The sealing sleeve 2 is sleeved on the stirring shaft 1. The connecting position of the stirring shaft 1 and the sealing sleeve 2 is provided with a sealing ring 3, a bearing 4, and a sealing ring 5 from top to bottom. The sealing sleeve 2 is provided with an annular groove 1 6, an annular groove 2 7 and an annular groove 3 8. The cross-section of the annular groove 1 6 is T-shaped.

[0031] The sealing ring 3 is provided with an upper lip 19, a lower lip 10, an upper lip 2 11, a lower lip 2 12, an upper lip 3 13, and a lower lip 3 14 which abut against the stirring shaft 1. The abutting positions of the upper lip 19, the lower lip 10, the upper lip 2 11, the lower lip 2 12, the upper lip 3 13, and the lower lip 3 14 with the stirring shaft 1 are all provided with a sealing protrusion ring group 15. The side of the sealing ring 3 away from the stirring shaft 1 is meshed with the annular groove 16; the inner ring of the bearing 4 is fixedly connected to the stirring shaft 1, and the outer ring of the bearing 4 is embedded in the annular groove 27 and fixedly connected to the sealing sleeve 2 The sealing ring 25 is provided with inner lips 16 and inner lips 17 from top to bottom to abut against the stirring shaft 1; the abutting positions of the inner lips 16 and inner lips 17 and the stirring shaft 1 are provided with sealing protrusion ring groups 20, and the side of the sealing ring 25 away from the stirring shaft 1 is embedded in the annular groove 3 8, and the sealing ring 25 is provided with outer lips 18 and outer lips 19 from top to bottom to abut against the sealing sleeve 2 in the annular groove 3 8, and the abutting positions of the outer lips 18 and outer lips 19 and the sealing sleeve 2 are provided with sealing protrusion ring groups 20.

[0032] like Figure 1-Figure 5 As shown, a receiving groove 21 is opened between the inner lip 16 and the outer lip 18, and a spring elastic member 22, an annular elastic member 23, and an arc-shaped elastic member 24 are arranged in the receiving groove 21. The spring elastic member 22 is fixedly connected to the bottom of the receiving groove 21, and the side of the spring elastic member 22 away from the bottom of the receiving groove 21 is fixedly connected to the annular elastic member 23, and both sides of the annular elastic member 23 abut against the receiving groove 21, and the side of the annular elastic member 23 away from the spring elastic member 22 is fixedly connected to the arc-shaped elastic member 24.

[0033] like Figure 1-Figure 5 As shown, a raised limiting structure (25) is provided on the inner side of the inner lip 16 and the outer lip 18, and the two ends of the arc-shaped elastic member 24 are against the connection between the limiting structure (25) and the receiving groove 21, and the two ends of the arc-shaped elastic member 24 are glued to the receiving groove 21, and the opening of the arc-shaped elastic member 24 points to the outside of the receiving groove 21, and a closed annular channel is formed between the arc-shaped elastic member 24 and the receiving groove 21.

[0034] like Figure 1-Figure 5 As shown, the arc-shaped elastic member 24 is a composite elastic member, and the arc-shaped elastic member 24 comprises an engineering plastic outer layer and an elastic metal inner layer from the outside to the inside, and the annular elastic member 23 is an elastic metal ring.

[0035] like Figure 1-Figure 5 As shown, a second accommodating groove 26 is opened between the inner lip 2 17 and the outer lip 2 19, a third accommodating groove 27 is opened between the upper lip 1 9 and the lower lip 1 10, a fourth accommodating groove 28 is opened between the upper lip 2 11 and the lower lip 2 12, and a fifth accommodating groove 29 is opened between the upper lip 3 13 and the lower lip 3 14. The internal structures of the second accommodating groove 26, the third accommodating groove 27, the fourth accommodating groove 28 and the fifth accommodating groove 29 are the same as those of the first accommodating groove 21.

[0036] like Figure 1-Figure 5 As shown, the upper lip 19 of the sealing ring 3, the arc-shaped elastic member 24, the lower lip 10 and the stirring shaft 1 form a closed annular cavity 10, the upper lip 2 11 of the sealing ring 3, the arc-shaped elastic member 24, the lower lip 2 12 and the stirring shaft 1 form a closed annular cavity 2 31, and the upper lip 3 13 of the sealing ring 3, the arc-shaped elastic member 24, the lower lip 3 14 and the stirring shaft 1 form a closed annular cavity 32.

[0037] like Figure 1-Figure 5 As shown, a closed annular cavity 4 33 is defined between the sealing ring 2 5 and the stirring shaft 1 , and a closed annular cavity 5 34 is defined between the sealing ring 2 5 and the sealing sleeve 2 .

[0038] Working principle: When the hot melt adhesive mixer is evacuated, a pressure difference is generated between the air inside and outside the arc-shaped elastic part 24 of the sealing ring 24, which generates an outward force on the arc-shaped elastic part 24 of the sealing ring 24, so that the arc-shaped elastic part 24 of the sealing ring 24 stretches and presses to both sides under the action of the force, thereby increasing the friction between the inner lip 1 16, the inner lip 2 17 of the sealing ring 24 and the stirring shaft 1, and at the same time increasing the friction between the outer lip 1 18, the outer lip 2 19 of the sealing ring 24 and the sealing sleeve 2.

[0039] The above description is only a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes for application in other fields. However, any simple modification or equivalent change made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A sealing structure for a hot melt adhesive mixer, characterized in that: The sealing structure comprises an agitator shaft (1) and a sealing sleeve (2), wherein the sealing sleeve (2) is sleeved on the agitator shaft (1), and a sealing ring 1 (3), a bearing (4), and a sealing ring 2 (5) are sequentially arranged from top to bottom at the connection position between the agitator shaft (1) and the sealing sleeve (2), and the sealing sleeve (2) is provided with an annular groove 1 (6), an annular groove 2 (7), and an annular groove 3 (8), and the cross section of the annular groove 1 (6) is T-shaped; The sealing ring 1 (3) is provided with an upper lip 1 (9), a lower lip 1 (10), an upper lip 2 (11), a lower lip 2 (12), an upper lip 3 (13), and a lower lip 3 (14) which abut against the stirring shaft (1); the abutting positions of the upper lip 1 (9), the lower lip 1 (10), the upper lip 2 (11), the lower lip 2 (12), the upper lip 3 (13), and the lower lip 3 (14) with the stirring shaft (1) are all provided with a sealing protrusion ring group 1 (15); the side of the sealing ring 1 (3) away from the stirring shaft (1) is meshed with the annular groove 1 (6); the inner ring of the bearing (4) is fixedly connected to the stirring shaft (1), and the outer ring of the bearing (4) is embedded in the annular groove 2 (7) and is connected to the sealing sleeve (2). The sealing ring 2 (5) is fixedly connected; the sealing ring 2 (5) is provided with inner lip 1 (16) and inner lip 2 (17) from top to bottom in sequence, which are in contact with the stirring shaft (1); the contact positions of the inner lip 1 (16) and inner lip 2 (17) with the stirring shaft (1) are both provided with sealing protrusion ring group 2 (20); the side of the sealing ring 2 (5) away from the stirring shaft (1) is embedded in the annular groove 3 (8); the sealing ring 2 (5) is provided with outer lip 1 (18) and outer lip 2 (19) from top to bottom in sequence, which are in contact with the sealing sleeve (2) in the annular groove 3 (8); the contact positions of the outer lip 1 (18) and outer lip 2 (19) with the sealing sleeve (2) are both provided with the sealing protrusion ring group 2 (20).

2. The sealing structure of the hot melt adhesive mixer according to claim 1, characterized in that: A receiving groove (21) is provided between the inner lip (16) and the outer lip (18), and a spring elastic member (22), an annular elastic member (23), and an arc-shaped elastic member (24) are provided in the receiving groove (21); the spring elastic member (22) is fixedly connected to the bottom of the receiving groove (21); a side of the spring elastic member (22) away from the bottom of the receiving groove (21) is fixedly connected to the annular elastic member (23); two sides of the annular elastic member (23) are in contact with the receiving groove (21); and a side of the annular elastic member (23) away from the spring elastic member (22) is fixedly connected to the arc-shaped elastic member (24).

3. The sealing structure of the hot melt adhesive mixer according to claim 2, characterized in that: A protruding limiting structure (25) is provided on the inner side of the inner lip (16) and the outer lip (18), and two ends of the arc-shaped elastic member (24) are against the connection between the limiting structure (25) and the accommodating groove (21). The two ends of the arc-shaped elastic member (24) are glued to the accommodating groove (21), and the opening of the arc-shaped elastic member (24) points to the outside of the accommodating groove (21), and a closed annular channel is formed between the arc-shaped elastic member (24) and the accommodating groove (21).

4. The sealing structure of the hot melt adhesive mixer according to claim 3, characterized in that: The arc-shaped elastic member (24) is a composite elastic member, and the arc-shaped elastic member (24) comprises, from the outside to the inside, an engineering plastic outer layer and an elastic metal inner layer, and the annular elastic member (23) is an elastic metal ring.

5. The sealing structure of the hot melt adhesive mixer according to claim 4, characterized in that: A second accommodating groove (26) is provided between the second inner lip (17) and the second outer lip (19), a third accommodating groove (27) is provided between the first upper lip (9) and the first lower lip (10), a fourth accommodating groove (28) is provided between the second upper lip (11) and the second lower lip (12), and a fifth accommodating groove (29) is provided between the third upper lip (13) and the third lower lip (14). The second accommodating groove (26), the third accommodating groove (27), the fourth accommodating groove (28) and the fifth accommodating groove (29) all have the same internal structure as the first accommodating groove (21).

6. The sealing structure of the hot melt adhesive mixer according to claim 5, characterized in that: The upper lip one (9), the arc-shaped elastic member (24), the lower lip one (10) of the sealing ring one (3) and the stirring shaft (1) form a closed annular cavity one (30); the upper lip two (11), the arc-shaped elastic member (24), the lower lip two (12) of the sealing ring one (3) and the stirring shaft (1) form a closed annular cavity two (31); the upper lip three (13), the arc-shaped elastic member (24), the lower lip three (14) of the sealing ring one (3) and the stirring shaft (1) form a closed annular cavity three (32).

7. The sealing structure of the hot melt adhesive mixer according to claim 6, characterized in that: A closed annular cavity four (33) is provided between the sealing ring two (5) and the stirring shaft (1), and a closed annular cavity five (34) is provided between the sealing ring two (5) and the sealing shaft sleeve (2).

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