CN210196461U - Shaft sealing device and concrete pouring stirrer - Google Patents

Abstract

The utility model provides a pair of shaft seal device and concrete placement mixer relates to the shaft seal technique field, this shaft seal device includes rotating ring and quiet ring, the rotating ring is used for the cover to establish on the rotation axis and can be along with rotation axis rotation, quiet ring setting outside the rotating ring and with rotating ring clearance fit, and quiet ring is gone up and has a first sealed inclined plane at least, a second sealed inclined plane has at least on the rotating ring, first sealed inclined plane sets up relatively with the second sealed inclined plane and forms labyrinth seal structure, labyrinth seal structure is used for preventing that liquid from passing through between rotating ring and the quiet ring. Because the rotating ring is not in direct contact with the static ring, the rotating ring does not generate friction with the static ring in the process of rotating along with the rotating shaft. Compared with the prior art, the utility model provides a pair of shaft seal device has adopted non-contact sealed, and wearing and tearing are little, need not frequent change, are favorable to the holistic maintenance of equipment, and sealed effectual simultaneously.

Description

Shaft sealing device and concrete pouring stirrer

Technical Field

The utility model relates to a shaft seal technical field particularly, relates to a shaft seal device and concrete placement mixer.

Background

The autoclaved aerated concrete block is prepared by adding aluminum powder as an air entraining agent into a mixture of calcareous materials (such as cement and lime) and siliceous materials (such as sand and fly ash), adding water, stirring, casting and molding, foaming and expanding, precuring and cutting, and curing by high-pressure steam. It has the advantages of light volume weight, high heat insulating performance, good sound absorbing effect, certain strength and machinability, etc.

In the production process, the pouring mixer is the indispensable equipment, and the mixer is the whole axle usually, and the thick liquids splashes at high-speed stirring in-process, for preventing thick liquids and water from following the (mixing) shaft entering bearing, need seal at the axle head that is close to in the cylinder body. Usually realize through skeleton oil blanket and J type sealing washer among the prior art, and because the stirring shaft rotational speed is high speed (700 supplyes 1200rpm), the skeleton oil blanket is sealed with the (mixing) shaft contact, must be because of the high temperature friction of high-speed production, and the wearing and tearing are accelerated, need often change, and the (mixing) shaft is integral (mixing) shaft, and it is very troublesome to change.

In view of this, it is important to design and manufacture a shaft sealing device which adopts non-contact sealing, has small abrasion, does not need to be frequently replaced, is beneficial to the overall maintenance of equipment, and has a good sealing effect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a shaft seal device, it has adopted non-contact sealed, and wearing and tearing are little, need not often to change, are favorable to the holistic maintenance of equipment, and sealed effectual simultaneously.

Another object of the utility model is to provide a concrete placement mixer has adopted non-contact axle sealing device to seal the rotation axis through labyrinth seal structure, avoid high-speed stirring in-process thick liquids to get into the bearing along the rotation axis, need not often to change seal structure simultaneously, it is convenient to maintain.

The utility model is realized by adopting the following technical scheme.

In one aspect, the utility model provides a shaft seal device for set up on the rotation axis, including rotating ring and quiet ring, the rotating ring is used for the cover to establish on the rotation axis and can rotate along with the rotation axis, quiet ring setting outside the rotating ring and with rotating ring clearance fit, and has a first sealed inclined plane on the quiet ring at least, has a second sealed inclined plane on the rotating ring at least, and first sealed inclined plane sets up and forms labyrinth seal structure with the sealed inclined plane of second relatively, and labyrinth seal structure is used for preventing that liquid from passing through between rotating ring and the quiet ring.

Furthermore, the bottom of the movable ring is also provided with a first baffle ring, and the first baffle ring is used for covering the rotating shaft.

Furthermore, first fender ring is hopper-shaped, and the diameter that first fender ring is close to the rotating ring is less than the diameter that first fender ring is kept away from the rotating ring.

Furthermore, the bottom of the static ring is also provided with a second retaining ring which covers the joint of the static ring and the dynamic ring.

Further, the shaft sealing device further comprises a bearing seat, a connecting bearing is arranged in the bearing seat and used for being sleeved on the rotating shaft, and the static ring is detachably connected with the bearing seat so as to enable the static ring to rotate relative to the dynamic ring.

Further, the stationary ring comprises a connecting portion and a sealing portion which are integrally arranged, a connecting through hole is formed in the connecting portion and connected with the bottom of the bearing seat through a bolt through the connecting through hole, and the sealing portion is in clearance fit with the movable ring.

Furthermore, only a limit stop block is arranged on the sealing part, and the limit stop block protrudes upwards and abuts against the bearing seat.

Furthermore, a plurality of first sealing convex teeth are arranged on the outer peripheral surface of the movable ring, a first sealing inclined surface is arranged on each first sealing convex tooth, a plurality of second sealing convex teeth are arranged on the inner peripheral surface of the static ring, a second sealing inclined surface is arranged on each second sealing convex tooth, and the first sealing convex teeth and the second sealing convex teeth are arranged in a staggered mode to form a labyrinth sealing structure.

Further, each of the first seal teeth and each of the second seal teeth have a trapezoidal cross-section.

In another aspect, the utility model provides a concrete placement mixer, including the pouring jar, rotation axis and axle sealing device, axle sealing device includes rotating ring and quiet ring, and the rotating ring overlaps to be established on the rotation axis and can be along with the rotation axis rotation, quiet ring setting outside the rotating ring and with rotating ring clearance fit, and has a first sealed inclined plane on the quiet ring at least, has a second sealed inclined plane on the rotating ring at least, and first sealed inclined plane sets up relatively with the second sealed inclined plane and forms labyrinth seal structure, and labyrinth seal structure is used for preventing that liquid from passing through between rotating ring and the quiet ring. The rotating shaft is arranged on the casting cylinder and extends into the casting cylinder.

The utility model discloses following beneficial effect has:

the utility model provides a pair of shaft seal device establishes the rotating shaft with the rotating ring cover, with quiet ring setting outside the rotating ring and with rotating ring clearance fit, the sealed inclined plane of second on the first sealed inclined plane on the quiet ring and the rotating ring sets up relatively and forms axle labyrinth seal structure. In the during operation, axial seal structure can prevent that mud and the steam condensate water of rotation axis lower part from entering into the upper portion of rotation axis, plays the effect of shaft seal, because direct contact not between rotating ring and the quiet ring, so the rotating ring can not produce the friction with quiet between the ring along with the rotatory in-process of rotation axis, so can the wearing and tearing of greatly reduced rotating ring and quiet ring, need not frequently to change the sealing member, only need to change lubricating grease can. Compared with the prior art, the utility model provides a pair of shaft seal device has adopted non-contact sealed, and wearing and tearing are little, need not frequent change, are favorable to the holistic maintenance of equipment, and sealed effectual simultaneously.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required 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 view of an assembly structure of a shaft seal device according to a first embodiment of the present invention;

fig. 2 is a schematic structural view of a shaft sealing device according to a first embodiment of the present invention;

FIG. 3 is an enlarged partial view of III of FIG. 2;

fig. 4 is a schematic structural view of a concrete pouring mixer according to a second embodiment of the present invention.

Icon: 10-pouring concrete into a stirrer; 100-shaft seal arrangement; 110-a movable ring; 111-a loop portion; 113-a stop; 115-a first stop ring; 117-first seal lobe; 130-stationary ring; 131-a connecting portion; 133-a seal; 135-limit stop block; 137-a second baffle ring; 139-second seal lobe; 150-a bearing seat; 151-connecting bearings; 170-labyrinth seal structure; 200-a rotating shaft; 300-casting cylinder.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly, e.g., as meaning 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Features in the embodiments described below may be combined with each other without conflict.

First embodiment

Referring to fig. 1 and 2 in combination, the present embodiment provides a shaft sealing device 100 for being disposed on a rotary shaft 200 and forming a shaft sealing device on the rotary shaft 200 to prevent mud or the like at a lower portion of the rotary shaft 200 from entering an upper portion of the rotary shaft 200. Meanwhile, the shaft sealing device 100 adopts non-contact sealing, is small in abrasion, does not need to be replaced frequently, and is beneficial to overall maintenance of equipment.

The shaft sealing device 100 provided by the embodiment comprises a movable ring 110, a stationary ring 130 and a bearing seat 150, wherein the movable ring 110 is used for being sleeved on a rotating shaft 200 and can rotate along with the rotating shaft 200, the stationary ring 130 is arranged outside the movable ring 110 and is in clearance fit with the movable ring 110, the stationary ring 130 is at least provided with a first sealing inclined surface, the movable ring 110 is at least provided with a second sealing inclined surface, the first sealing inclined surface and the second sealing inclined surface are oppositely arranged and form a labyrinth sealing structure 170, and the labyrinth sealing structure 170 is used for preventing liquid from passing between the movable ring 110 and the stationary ring 130. A connecting bearing 151 is arranged in the bearing seat 150, the connecting bearing 151 is used for being sleeved on the rotating shaft 200, and the stationary ring 130 is detachably connected with the bearing seat 150, so that the movable ring 110 can rotate relative to the stationary ring 130.

In this embodiment, the bearing housing 150 is fixedly installed on the outer casting cylinder 300, the connecting bearing 151 is a conventional bearing, the outer ring of which is relatively fixed with the bearing housing 150, the inner ring is relatively fixed with the rotating shaft 200, and the stationary ring 130 is disposed at the bottom of the bearing housing 150 and relatively fixed with the outer ring of the connecting bearing 151.

The stationary ring 130 includes a connecting portion 131 and a sealing portion 133 that are integrally disposed, a connecting hole is opened on the connecting portion 131, and the connecting hole is connected to the bottom bolt of the bearing seat 150, and the sealing portion 133 is in clearance fit with the movable ring 110. Specifically, the connecting portion 131 and the sealing portion 133 are both annular, and 4 connecting through holes have been provided on the connecting portion 131, and the 4 connecting through holes are in a cross layout, so that the connecting portion 131 can be fixed on the bearing seat 150 from four directions, and a fixing effect is ensured. Of course, the number of the connection through holes is not particularly limited, and may be 5, 6, or 7.

In this embodiment, the sealing portion 133 is further provided with a limit stop block 135, and the limit stop block 135 protrudes upward and abuts against the bearing seat 150. Specifically, the limit stop block 135 is annular and forms a stop surface with the upper surface of the sealing portion 133, and the bottom edge of the bearing seat 150 abuts against the stop surface, so that the static ring 130 can be conveniently aligned when the static ring 130 is installed, and meanwhile, the top of the limit stop block 135 abuts against the connecting bearing 151, and the function of supporting the connecting bearing 151 is also achieved.

In this embodiment, the bottom of the rotating ring 110 is further provided with a first stop ring 115, and the first stop ring 115 is used for covering the rotating shaft 200. Specifically, the first baffle ring 115 is funnel-shaped, and a diameter of the first baffle ring 115 close to the moving ring 110 is smaller than a diameter of the first baffle ring 115 far from the moving ring 110. By providing the first baffle ring 115, most of the slurry can be blocked from splashing into the seal area.

In other preferred embodiments of the present invention, the first baffle ring 115 may be a straight cylinder with a diameter larger than the diameter of the rotating shaft 200, so as to cover the rotating shaft 200 and prevent the slurry from splashing.

In this embodiment, the bottom of the stationary ring 130 is further provided with a second retaining ring 137, and the second retaining ring 137 covers the joint of the stationary ring 130 and the moving ring 110. Specifically, the bottom of the sealing portion 133 is provided with a second baffle ring 137, and the second baffle ring 137 is formed by extending the bottom of the sealing portion 133 downward vertically, is close to the upper portion of the first baffle ring 115, and forms a screen structure together with the first baffle ring 115, so that most of slurry can be prevented from entering the inside of the sealing area.

In other preferred embodiments of the present invention, the second baffle ring 137 may be funnel-shaped and level with the first baffle ring 115, which also functions to block the slurry, and is not specifically described herein.

The movable ring 110 includes a ring sleeve portion 111 and a stopping portion 113, which are integrally disposed, the ring sleeve portion 111 is sleeved on the rotating shaft 200, the stopping portion 113 is disposed at the bottom of the ring sleeve portion 111 and protrudes outward, a shaft-protruding stopping ring is further disposed on the rotating shaft 200, and the stopping portion 113 abuts against the shaft-protruding stopping ring to prevent the ring sleeve portion 111 from sliding along the rotating shaft 200 under the action of gravity during the rotation process. Specifically, the stopper portion 113 is in a ring plate shape and is located below the sealing portion 133, and a gap between the stopper portion 113 and the sealing portion 133 is less than or equal to 2mm, which can achieve a certain blocking effect.

Referring to fig. 3, a plurality of first sealing teeth 117 are provided on an outer circumferential surface of the moving ring 110, each first sealing tooth 117 has a first sealing slope, a plurality of second sealing teeth 139 are provided on an inner circumferential surface of the stationary ring 130, each second sealing tooth 139 has a second sealing slope, and the plurality of first sealing teeth 117 and the plurality of second sealing teeth 139 are alternately arranged to form a labyrinth structure 170. Specifically, a plurality of first seal teeth 117 are provided on the outer circumferential surface of the collar portion 111, and a plurality of second seal teeth 139 are provided on the inner circumferential surface of the seal portion 133. It is noted that the first sealing teeth 117 are arranged in series in the vertical direction, and the second sealing teeth 139 are also arranged in series in the vertical direction.

In this embodiment, the upper and lower surfaces of each first sealing tooth 117 form two first sealing inclined surfaces, the upper and lower surfaces of each second sealing tooth 139 form two second sealing teeth 139, and the labyrinth seal structure 170 is formed by the relative arrangement between the plurality of first sealing inclined surfaces and the plurality of second sealing inclined surfaces, it should be noted that the axial seal structure is filled with grease, so as to increase the sealing effect and ensure that the stationary ring 130 and the moving ring 110 can slide freely relatively, thereby avoiding the wear between the stationary ring 130 and the moving ring 110 caused by local gravity deformation or extrusion deformation.

It should be noted that, in the present embodiment, the first seal tooth 117 and the second seal tooth 139 are both annular, and each of the first seal tooth 117 and the second seal tooth 139 has a trapezoidal cross section. Of course, here, the cross section of the first seal tooth 117 and the second seal tooth 139 may be rectangular, triangular, or the like, and is not limited in particular.

Specifically, the spacing between two adjacent first seal teeth 117 is greater than or equal to the axial width of each second seal tooth 139. Similarly, the spacing between two adjacent second seal teeth 139 is greater than or equal to the axial width of each first seal tooth 117, and the width between the first seal teeth 117 is equal to the width between the second seal teeth 139, facilitating the engagement between the first seal teeth 117 and the second seal teeth 139.

In summary, in the shaft sealing device 100 provided in this embodiment, during actual operation, the moving ring 110 and the stationary ring 130 form an axial labyrinth seal, and the axial labyrinth seal can prevent mud and steam condensate at the lower part of the rotating shaft 200 from entering the upper part of the rotating shaft 200 and entering the connecting bearing 151, so as to achieve the effect of shaft sealing, and because the moving ring 110 and the stationary ring 130 are not in direct contact, the moving ring 110 does not rub against the stationary ring 130 in the process of rotating along with the rotating shaft 200, so that the wear of the moving ring 110 and the stationary ring 130 can be greatly reduced, and the sealing elements do not need to be frequently replaced, and only the grease needs to be replaced. Compared with the prior art, the shaft sealing device 100 provided by the embodiment adopts non-contact sealing, is small in abrasion, does not need to be frequently replaced, is beneficial to overall maintenance of equipment, and is good in sealing effect.

Second embodiment

Referring to fig. 4, the present embodiment provides a concrete pouring mixer 10, which includes a pouring cylinder 300, a rotating shaft 200 and a shaft sealing device 100, wherein the basic structure and principle of the shaft sealing device 100 and the technical effects thereof are the same as those of the first embodiment, and for the sake of brief description, the corresponding contents of the first embodiment can be referred to where not mentioned in part.

The shaft sealing device 100 comprises a movable ring 110 and a stationary ring 130, wherein the movable ring 110, the stationary ring 130 and a bearing seat 150 are included, the movable ring 110 is sleeved on the rotating shaft 200 and can rotate along with the rotating shaft 200, the stationary ring 130 is arranged outside the movable ring 110 and in clearance fit with the movable ring 110, the stationary ring 130 is at least provided with a first sealing inclined surface, the movable ring 110 is at least provided with a second sealing inclined surface, the first sealing inclined surface and the second sealing inclined surface are oppositely arranged and form a labyrinth sealing structure 170, and the labyrinth sealing structure 170 is used for preventing liquid from passing between the movable ring 110 and the stationary ring 130. A connecting bearing 151 is arranged in the bearing seat 150, the connecting bearing 151 is sleeved on the rotating shaft 200, and the stationary ring 130 is detachably connected with the bearing seat 150, so that the movable ring 110 can rotate relative to the stationary ring 130. The rotary shaft 200 is provided on the casting cylinder 300 and extends into the casting cylinder 300.

In this embodiment, the bearing seat 150 is fixed on the upper side of the casting cylinder 300 by bolts, and the end of the rotating shaft 200 extending into the casting cylinder 300 is further provided with a stirring blade to realize a stirring function.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by 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 (10)

1. The utility model provides a shaft seal device for set up on the rotation axis, its characterized in that, including rotating ring and quiet ring, the rotating ring is used for the cover to establish on the rotation axis and can along with the rotation axis rotates, quiet ring sets up the rotating ring outer and with rotating ring clearance fit, just quiet ring is last to have a first sealed inclined plane at least, a second sealed inclined plane has at least on the rotating ring, first sealed inclined plane with the second sealed inclined plane sets up relatively and forms labyrinth seal structure, labyrinth seal structure is used for preventing liquid from passing through the rotating ring with between the quiet ring.

2. The shaft seal arrangement of claim 1 wherein the bottom of the rotating ring is further provided with a first retaining ring for covering the rotating shaft.

3. The shaft seal of claim 2 wherein the first stop ring is funnel shaped and has a diameter proximate the rotating ring that is smaller than a diameter of the first stop ring distal the rotating ring.

4. The shaft sealing device according to claim 1 or 2, wherein a second retaining ring is further disposed at the bottom of the stationary ring, and the second retaining ring covers a joint of the stationary ring and the movable ring.

5. The shaft seal device according to claim 1, comprising a bearing seat, wherein a connecting bearing is arranged in the bearing seat, the connecting bearing is used for being sleeved on the rotating shaft, and the stationary ring is detachably connected with the bearing seat so that the movable ring can rotate relative to the stationary ring.

6. The shaft sealing device according to claim 5, wherein the stationary ring comprises a connecting portion and a sealing portion which are integrally arranged, the connecting portion is provided with a connecting through hole and is connected with the bottom bolt of the bearing seat through the connecting through hole, and the sealing portion is in clearance fit with the movable ring.

7. The shaft seal arrangement according to claim 6, characterized in that only a limit stop is provided on the sealing portion, which limit stop projects upwards and abuts against the bearing seat.

8. The shaft seal device according to claim 1, wherein a plurality of first seal teeth are provided on an outer peripheral surface of the movable ring, each of the first seal teeth has the first seal slope thereon, a plurality of second seal teeth are provided on an inner peripheral surface of the stationary ring, each of the second seal teeth has the second seal slope thereon, and the plurality of first seal teeth and the plurality of second seal teeth are alternately arranged and form the labyrinth seal structure.

9. The shaft seal arrangement of claim 8 wherein each of said first seal lobe and said second seal lobe is trapezoidal in cross section.

10. A concrete casting mixer comprising a casting cylinder, a rotatable shaft and a shaft seal arrangement as claimed in any one of claims 1 to 9, said rotatable shaft being disposed on and extending into said casting cylinder, said rotatable shaft being journalled on said rotatable shaft.

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