CN216200508U

CN216200508U - Easily change powder axle head sealing device

Info

Publication number: CN216200508U
Application number: CN202122753900.1U
Authority: CN
Inventors: 陈刚; 曾金山; 刘国虎
Original assignee: Wuhan Newkegu Technology Co ltd
Current assignee: Wuhan Newkegu Technology Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-04-05
Anticipated expiration: 2031-11-11

Abstract

The utility model belongs to the technical field of feed processing equipment, and discloses an easily-replaceable powder shaft end sealing device which comprises a sealing outer cavity and a sealing inner core, wherein the sealing inner core is arranged in the sealing outer cavity, the sealing outer cavity is sleeved outside a rotating shaft and is fixedly arranged on the surface of a side shell plate of the equipment, the sealing inner core is sleeved on the surface of the rotating shaft, the utility model is used for sealing the surface of a rotating shaft, compressed air of 0.05-0.1 MPa is filled into a sealing inner core and a sealing outer cavity, the compressed air in the sealing outer cavity is guided into the rotary contact surface of the fluorine rubber framework sealing lip and the rotating shaft through four ventilation grooves on the end surface of the sealing inner core by the adjustment of the air flow regulating valve, so that the compressed air is back-pressed or flows to the inner side, thereby preventing powder media from passing through the sealing surface, the sealing lip of the fluorine rubber framework and the rotating shaft are protected, so that the sealing performance is enhanced, and the abrasion of a sealing working surface is reduced.

Description

Easily change powder axle head sealing device

Technical Field

The utility model relates to the technical field of feed processing equipment, in particular to a shaft end sealing device for easily replaced powder.

Background

The feed conveyer and the main shaft end dynamic seal of the mixer belong to wearing parts and need to be replaced regularly. The existing solutions are as follows: 1. the asbestos disc or the polytetrafluoroethylene disc is arranged at a position easy to leak materials, the maintenance and replacement period is too short, and the old disc is difficult to pull out during replacement; 2. the molded rubber product or the skeleton sealing ring has high requirement on the coaxiality precision of the main shaft and the mounting flange, and the motor and the bearing need to be removed during replacement, so that the reliability is poor, the workload is extremely high, the maintenance cost is high, and the customer experience is poor; 3. the mode of using the air gaps of the slip rings on two sides of the middle elastomer requires a special mold to injection mold the elastomer and the slip rings, the universality is not strong, the cost is high, the requirement on the elastomer material is high, the easily worn slip rings are easily clamped and fail, the replacement period is short, and the half year is common. Therefore, a new powder shaft end sealing device needs to be designed to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model is realized by the following steps:

the easily-replaced powder shaft end sealing device comprises a sealing outer cavity and a sealing inner core, wherein the sealing inner core is arranged inside the sealing outer cavity, the sealing outer cavity is sleeved outside a rotating shaft and fixedly installed on the surface of a side shell of equipment, and the sealing inner core is sleeved on the surface of the rotating shaft and used for sealing the surface of the rotating shaft.

The sealed outer cavity comprises a cavity body and two sealed end covers, the two sealed end covers are respectively arranged at two sides of the cavity body and are symmetrically arranged by taking the radial central line of the cavity body as an original point, the sealed end covers and the surface of the cavity body are respectively and uniformly provided with a plurality of first through holes and second through holes along the axial direction, the surface of the equipment side shell plate is provided with mounting screw holes corresponding to the positions of the through holes, the mounting screw holes are in threaded connection with one end of a mounting screw rod, the other end of the mounting screw holes penetrates through the first through holes and the second through holes to be in threaded connection with gland nuts, the cavity body and the two sealed end covers are mutually compressed and sealed through the mounting screw rod and the gland nuts, one side of the cavity body is provided with an air inlet hole, one end of the air inlet hole, which is far away from the axial central line of the cavity body, is fixedly provided with an adjusting valve, and the air amount adjusting valve is communicated with a compressed air source, and injecting compressed air into the sealed outer cavity through an air quantity regulating valve to provide pressure for the sealed inner core.

In an embodiment of the utility model, the sealing inner core is composed of a first half core body, a second half core body and a fluorine rubber framework, the first half core body and the second half core body are both of a semicircular structure and are symmetrically arranged, the first half core body and the second half core body are fixedly connected through screws, mounting grooves are formed in the centers of the tops of the first core body and the second half core body, the fluorine rubber framework is arranged in an annular space formed by the two mounting grooves, the fluorine rubber framework is sleeved on the outer surface of the rotating shaft to play a sealing role, a plurality of ventilation grooves are formed in one side of each of the first half core body and the second half core body, and the ventilation grooves are communicated with the mounting grooves.

In an embodiment of the utility model, stepped holes and threaded blind holes are respectively formed on the left side and the right side of the tops of the first half core body and the second half core body, the stepped holes of the first half core body and the threaded blind holes of the second core body are correspondingly arranged, fastening screws are arranged in the stepped holes, and the fastening screws are in threaded connection with the insides of the threaded blind holes.

In an embodiment of the present invention, the first half core body and the second half core body are both made of nylon material, and vaseline for lubrication is filled between the inner wall of the annular space formed by the two mounting grooves and the fluorine rubber skeleton.

In an embodiment of the utility model, the pressure value of compressed air filled in the sealing outer cavity is 0.05-0.1 MPa, and the compressed air is guided to the rotary contact surface of the sealing lip of the fluorine rubber framework and the rotating shaft through the four air-permeable grooves of the sealing inner core under the control of the air quantity regulating valve.

In one embodiment of the utility model, the cross section of the sealing end cover is of a T-shaped structure, the cross section of the cavity is of an I-shaped structure, and sealing gaskets are arranged between the joint surfaces of the sealing end cover and the cavity.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, 0.05-0.1 MPa of compressed air is filled in the sealing inner core and the sealing outer cavity, and is regulated by the air quantity regulating valve, the compressed air in the sealing outer cavity is guided into the rotating contact surface of the fluorine rubber framework sealing lip and the rotating shaft through the four air-permeable grooves on the end surface of the sealing inner core, so that the compressed air is subjected to back pressure or flows to the inner side, a powder medium is prevented from passing through the sealing surface, the fluorine rubber framework sealing lip and the rotating shaft are protected, and the abrasion of a sealing working surface is reduced while the sealing performance is enhanced.

2. According to the utility model, the cavity and the sealing end covers on two sides are tightly pressed and sealed by the mounting screw rod and the compression nut, and the sealing inner core is of a split structure formed by fixedly connecting the half core body I and the half core body II, so that in the maintenance process, the device can rapidly disassemble and replace parts, shorten the maintenance time and reduce the maintenance cost.

3. According to the utility model, the sealing inner core is assembled in the sealing outer cavity in a floating manner and is not contacted with the sealing outer cavity, so that the eccentric abrasion of the sealing inner core caused by the non-concentricity of the sealing outer cavity and the rotating shaft is avoided, the integral sealing effect is improved, and the service life of the sealing inner core is prolonged.

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 overall perspective view of an embodiment of the present invention;

FIG. 2 is a schematic diagram of a three-dimensional explosive structure provided by an embodiment of the present invention;

fig. 3 is a schematic view of a half-core-body-plane structure according to an embodiment of the present invention.

Description of reference numerals: 1. a rotating shaft; 2. an equipment-side shell plate; 21. mounting a screw hole; 3. sealing the outer cavity; 31. sealing the end cap; 311. a first through hole; 32. a cavity; 321. an air inlet; 322. a second through hole; 4. installing a screw rod; 5. a compression nut 6 and an air quantity regulating valve; 7. sealing the inner core; 71. fastening screws; 72. a first half core body; 721. a stepped hole; 722. a ventilation groove; 723. mounting grooves; 724. a threaded blind hole; 73. a fluorine rubber framework; 74. and a second half core body.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the 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 is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Examples

Referring to the attached drawings 1-3, the utility model provides an easily-replaced powder shaft end sealing device, which comprises a sealing outer cavity 3 and a sealing inner core 7, wherein the sealing inner core 7 is arranged inside the sealing outer cavity 3, the sealing outer cavity 3 is sleeved outside a rotating shaft 1 and is fixedly arranged on the surface of an equipment side shell plate 2, and the sealing inner core 7 is sleeved on the surface of the rotating shaft 1 and is used for sealing the surface of the rotating shaft 1.

The sealed outer cavity 3 comprises a cavity 32 and two sealed end covers 31, the two sealed end covers 31 are respectively arranged at two sides of the cavity 32, and are symmetrically arranged by taking the radial central line of the cavity 32 as an original point, the surfaces of the sealed end covers 31 and the cavity 32 are respectively and uniformly provided with a plurality of first through holes 311 and second through holes 322 along the axial direction, the surface of the equipment side shell plate 2 and the positions corresponding to the through holes are respectively provided with an installation screw hole 21, the installation screw hole 21 is in threaded connection with one end of an installation screw rod 4, the other end of the installation screw hole 21 penetrates through the first through holes 311 and the second through holes 322 to be in threaded connection with a gland nut 5, the cavity 32 and the two sealed end covers 31 are mutually compressed and sealed through the installation screw rod 4 and the gland nut, one side of the cavity 32 is provided with an air inlet hole 321, one end of the air inlet hole 321, which is far away from the axial central line of the cavity 32, is fixedly provided with an adjusting valve 6, the air quantity adjusting valve 6 is communicated with a compressed air source, compressed air is injected into the sealed outer cavity 3 through the air quantity adjusting valve 6 to provide pressure for the sealed inner core 7.

In an embodiment of the present invention, further, the sealing inner core 7 is composed of a first half core body 72, a second half core body 74 and a fluorine rubber frame 73, the first half core body 72 and the second half core body 74 are both in a semicircular structure and are symmetrically arranged, the first half core body 74 and the second half core body 74 are fastened and connected by screws, mounting grooves 723 are respectively formed in centers of tops of the first half core body 72 and the second half core body 74, the fluorine rubber frame 73 is arranged in an annular space formed by the two mounting grooves 723, the fluorine rubber frame 73 is sleeved on an outer surface of the rotating shaft 1 to perform a sealing function, a plurality of air permeable grooves 722 are respectively formed in one side of the first half core body 72 and one side of the second half core body 74, and the plurality of air permeable grooves 722 are respectively communicated with the mounting grooves 723.

Specifically, as shown in fig. 1-2, the sealing inner core 7 is sleeved on the surface of the rotating shaft 1, the cavity 32 and the sealing end covers 31 at two sides are pressed and sealed by the mounting screw rod 4 and the compression nut 5, then the sealing inner core 7 and the sealing outer cavity 3 are filled with 0.05-0.1 MPa of compressed air, the compressed air in the sealing outer cavity 3 is adjusted by the air quantity adjusting valve 6, the compressed air in the sealing inner core 7 is guided into the rotary contact surface of the sealing lip of the fluorine rubber framework 73 and the rotating shaft 1 through the four air-permeable grooves 722 on the end surface of the sealing inner core 7, the compressed air is enabled to be back-pressed or flow inwards, so that powder media are prevented from passing through the sealing surface, the sealing lip of the fluorine rubber framework 73 and the rotating shaft 1 are protected, and the abrasion of the sealing working surface is reduced, and the sealing inner core 7 is assembled in the sealing outer cavity 3 in a floating manner without being in contact with the sealing outer cavity 3, so that the eccentric abrasion of the sealing outer cavity 3 and the sealing inner core 7 caused by the decentration of the main shaft is avoided, thereby improving the overall sealing effect and prolonging the service life of the sealing inner core 7.

In an embodiment of the utility model, further, the left and right sides of the top of the first half core body 72 and the second half core body 74 are respectively provided with a stepped hole 721 and a threaded blind hole 724, the stepped hole 721 of the first half core body 72 and the threaded blind hole 724 of the second half core body are correspondingly arranged, a fastening screw 71 is arranged in the stepped hole 721, the fastening screw 71 is in threaded connection with the interior of the threaded blind hole 724, the first half core body 72 and the second half core body 74 are both made of nylon material, vaseline with a lubricating effect is filled between the inner wall of an annular space formed by the two mounting grooves 723 and the fluorine rubber framework 73, a split structure of the fluorine rubber framework 73 is arranged in the sealing inner core 7, the sealing effect can be enhanced by using the two fluorine rubber frameworks 73, the inner wall can be filled with a small amount of vaseline for lubrication, the first half core body is made of wear-resistant nylon material and can be used as a coarse sealing, meanwhile, the nylon half core also adopts a half split structure and is connected by four stainless steel pan head self-tapping screws, so that the disassembly and replacement are convenient and quick, and the maintenance efficiency of equipment is improved.

In an embodiment of the present invention, further, the pressure value of the compressed air charged in the sealed outer cavity 3 is 0.05-0.1 MPa, and the compressed air is guided to the rotary contact surface of the sealing lip of the fluorine rubber skeleton 73 and the rotating shaft 1 through the four air-permeable grooves 722 of the sealed inner core 7 under the control of the air quantity regulating valve 6.

In an embodiment of the present invention, further, the cross section of the end cap 31 is a T-shaped structure, the cross section of the cavity 32 is an i-shaped structure, and a sealing gasket is disposed between the joint surfaces of the end cap 31 and the cavity 32.

Specifically, this easily change powder axle head sealing device's theory of operation: the sealing inner core 7 is sleeved on the surface of the rotating shaft 1, the cavity 32 and the sealing end covers 31 on two sides are pressed and sealed through the mounting screw rod 4 and the compression nut 5, then 0.05-0.1 MPa of compressed air is filled into the sealing inner core 7 and the sealing outer cavity 3, the compressed air in the sealing outer cavity 3 is adjusted through the air quantity adjusting valve 6, the compressed air in the sealing inner core 7 is guided into the rotary contact surface of the sealing lip of the fluorine rubber framework 73 and the rotating shaft 1 through the four air-permeable grooves 722 on the end surface of the sealing inner core 7, the compressed air is enabled to be subjected to back pressure or flow towards the inner side, a powder medium is prevented from penetrating through the sealing surface, and the sealing lip of the fluorine rubber framework 73 and the rotating shaft 1 are protected, so that the abrasion of a sealing working surface is reduced.

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

1. The easily-replaced powder shaft end sealing device is characterized by comprising a sealing outer cavity (3) and a sealing inner core (7), wherein the sealing inner core (7) is arranged inside the sealing outer cavity (3), the sealing outer cavity (3) is sleeved outside a rotating shaft (1) and fixedly arranged on the surface of an equipment side shell plate (2), the sealing inner core (7) is sleeved on the surface of the rotating shaft (1) and used for sealing the surface of the rotating shaft (1),

the sealing outer cavity (3) comprises a cavity (32) and two sealing end covers (31), the two sealing end covers (31) are respectively arranged at two sides of the cavity (32) and are symmetrically arranged by taking a radial central line of the cavity (32) as an original point, a plurality of first through holes (311) and second through holes (322) are respectively and uniformly arranged on the surfaces of the sealing end covers (31) and the cavity (32) along the axial direction, mounting screw holes (21) are respectively arranged on the surfaces of the equipment side shell plates (2) and the positions corresponding to the through holes, the mounting screw holes (21) are in threaded connection with one end of a mounting screw rod (4), the other end of the mounting screw hole (21) penetrates through the first through holes (311) and the second through holes (322) to be in threaded connection with a compression nut (5), and the cavity (32) and the two sealing end covers (31) are mutually compressed and sealed through the mounting screw rod (4) and the compression nut, an air inlet (321) is formed in one side of the cavity (32), an air quantity adjusting valve (6) is fixedly mounted at one end, far away from the axial center line of the cavity (32), of the air inlet (321), the air quantity adjusting valve (6) is communicated with a compressed air source, and compressed air is injected into the sealed outer cavity (3) through the air quantity adjusting valve (6) to provide pressure for the sealed inner core (7).

2. The easily replaceable powder shaft end sealing device according to claim 1, wherein the sealing inner core (7) is composed of a first half core body (72), a second half core body (74) and a fluorine rubber framework (73), the first half core body (72) and the second half core body (74) are both in a semicircular structure and are symmetrically arranged, the first half core body (72) and the second half core body (74) are fixedly connected through screws, mounting grooves (723) are formed in the centers of the tops of the first core body and the second half core body (74), the fluorine rubber framework (73) is arranged in an annular space formed by the two mounting grooves (723), the fluorine rubber framework (73) is sleeved on the outer surface of the rotating shaft (1) to play a sealing role, and a plurality of air-permeable grooves (722) are formed in one side of the first half core body (72) and one side of the second half core body (74), the plurality of air-permeable grooves (722) are communicated with the mounting groove (723).

3. The shaft end sealing device for easily replaced powder shaft as defined in claim 2, wherein a stepped hole (721) and a threaded blind hole (724) are respectively formed on the left and right sides of the top of the first half core body (72) and the second half core body (74), the stepped hole (721) of the first half core body (72) and the threaded blind hole (724) of the second half core body are correspondingly arranged, a fastening screw (71) is arranged inside the stepped hole (721), and the fastening screw (71) is screwed inside the threaded blind hole (724).

4. The shaft end sealing device for easily replaceable powder material of claim 3, wherein the first half core body (72) and the second half core body (74) are made of nylon material, and vaseline with a lubricating effect is filled between the inner wall of an annular space formed by the two mounting grooves (723) and the fluorine rubber framework (73).

5. The shaft end sealing device for easily replaceable powder materials, as set forth in claim 4, characterized in that the pressure value of the compressed air charged into the outer sealing cavity (3) is 0.05-0.1 MPa, and the compressed air is guided to the rotary contact surface of the sealing lip of the fluorine rubber framework (73) and the rotary shaft (1) through the four air-permeable grooves (722) of the inner sealing core (7) under the control of the air quantity regulating valve (6).

6. The easily replaceable powder shaft end sealing device is characterized in that the cross section of the sealing end cover (31) is of a T-shaped structure, the cross section of the cavity (32) is of an I-shaped structure, and sealing gaskets are arranged between the joint surfaces of the sealing end cover (31) and the cavity (32).