CN214499810U - Sealing device - Google Patents

Abstract

The utility model provides a sealing device, it includes: the motor speed reducer is arranged at the upper part of the sealing device and is fixed on the speed reducer bracket; the transmission shaft is connected with the motor reducer, and the reducer bracket is hermetically connected with a bearing seat arranged in the middle of the sealing device; the pair of bearings are arranged in the bearing seats and used for automatically aligning; the plurality of oil seals are respectively arranged in a bearing gland above the bearing, below the bearing seat and in a cavity of the stuffing box and are used for preventing impurities from entering the bearing seat; the stuffing box is arranged below the sealing device and connected with the bearing seat; and the multiple groups of packing are arranged above the barrel connecting flange of the sealing device and used for preventing gas leakage. The sealing device mainly solves the problems that the traditional sealing device is poor in sealing effect, serious in air leakage and great in pollution to the environment.

Description

Sealing device

Technical Field

The utility model relates to a gas-liquid seal field, more specifically relates to a sealing device.

Background

The kitchen waste is food waste generated in daily business and living processes of catering units and families, and is one of main components of urban organic waste. The kitchen waste mainly comprises food waste and kitchen waste.

At present, the harmless treatment of the kitchen waste mainly comprises pretreatment and subsequent anaerobic digestion treatment. And in the pretreatment process, a sand setting device is required to be used for removing sediments such as gravel and the like contained in the kitchen materials.

The existing sand settling device is mostly sealed by adopting simple packing, so that the sealing effect is poor, the foreign odor is serious, and meanwhile, the shaft and a bearing seat installation angle error or the bent shaft of the shaft cause great damage, and the service life of the shaft is shortened. The existing packing seal is only packing seal, and an oil seal and the like are not designed, so that the complete leakage can not be ensured.

The packing seal in the related art is to fill a soft packing (commonly called packing) between a shaft and a housing for sealing a reciprocating motion and a rotating motion of a liquid or gas medium, and then to compress the packing with a gland and a screw to achieve the purpose of sealing. The pressing force of the packing is not uniformly distributed along the axial direction, and the shaft is worn most quickly at the position close to the gland. When the pressure is low, the shaft speed may be high, whereas the speed is low.

Accordingly, there is a need to provide a sealing device that addresses at least the above-mentioned problems of the prior art.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one of the above problems, according to an aspect of the present invention, there is provided a sealing device including: the motor speed reducer is arranged at the upper part of the sealing device and is fixed on the speed reducer bracket; the transmission shaft is connected with the motor reducer, and the reducer bracket is hermetically connected with a bearing seat arranged in the middle of the sealing device; the pair of bearings are arranged in the bearing seats and used for automatically aligning; the plurality of oil seals are respectively arranged in a bearing gland above the bearing, below the bearing seat and in a cavity of the stuffing box and are used for preventing impurities from entering the bearing seat; the stuffing box is arranged below the sealing device and connected with the bearing seat; and the multiple groups of packing are arranged above the barrel connecting flange of the sealing device and used for preventing gas leakage.

In some embodiments, the oil seal comprises a rotating shaft lip seal.

In some embodiments, the bearing comprises a self-aligning roller bearing.

In some embodiments, the seal further comprises a bushing disposed below the seal, wherein the bushing is fixed to the drive shaft.

In some embodiments, an O-ring is disposed between the bushing and the driveshaft for sealing the bushing.

In some embodiments, the sealing device further comprises a spacer ring disposed between the pair of bearings for positioning the bearings.

In some embodiments, the sealing device further comprises an annular ring disposed above the pair of bearings, the annular ring is provided with an annular groove and a through hole, and the upper annular ring is connected with the oil cup through the through hole disposed on the bearing seat, so that the lubricating oil enters the bearings through the annular groove and the through hole on the annular ring.

In some embodiments, the stuffing box and the sealing surface of the bearing housing are provided with O-rings.

The utility model provides a sealing device, it is not good, gas leakage is serious mainly to have solved traditional sealing device's sealed effect, causes the problem of very big pollution to the environment, can reduce axle and bearing frame installation angle error or the crooked counter shaft of axle simultaneously and cause the damage.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail embodiments of the present invention with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the invention and not to limit the invention. In the drawings, like reference numbers generally represent like parts or steps.

Fig. 1 is a schematic view of a sealing device according to an embodiment of the present invention;

FIG. 2 is an enlarged node diagram of node I of FIG. 1; and

fig. 3 is an enlarged node diagram of node II in fig. 1.

In the above drawings, the specific reference numerals refer to the following parts:

1-a motor reducer;

2-a coupler;

3-a reducer bracket;

4-a transmission shaft;

5-a gasket;

6-self-aligning roller bearing;

7-oil cup;

8-rotating shaft lip seal;

9-ring of holes;

10-a bearing seat;

11-spacer ring;

12-a packing gland;

13-stuffing box;

14-O-rings;

15-shaft sleeve;

16-a lock nut;

17-a lock washer;

18-a bearing gland;

19-packing; and

20-sealed gas inlet pipe

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the present invention and are not intended to limit the invention to the particular embodiments described herein. Based on the embodiments of the present invention described in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

The existing sand settling device is mostly sealed by adopting simple packing, so that the sealing effect is poor, the foreign odor is serious, and meanwhile, the shaft and a bearing seat installation angle error or the bent shaft of the shaft cause great damage, and the service life of the shaft is shortened. The existing packing seal is only packing seal, and an oil seal and the like are not designed, so that the complete leakage can not be ensured.

The packing seal in the related art is to fill a soft packing (commonly called packing) between a shaft and a housing for sealing a reciprocating motion and a rotating motion of a liquid or gas medium, and then to compress the packing with a gland and a screw to achieve the purpose of sealing. The pressing force of the packing is not uniformly distributed along the axial direction, and the shaft is worn most quickly at the position close to the gland. When the pressure is low, the shaft speed may be high, whereas the speed is low.

The utility model provides a novel sealing device, it is not effectual, gas leakage is serious mainly to solve traditional sand setting equipment sealing device, causes very big pollution to the environment, can reduce axle and bearing frame installation angle error or axle bending counter shaft simultaneously and cause the damage. The utility model provides a sealing device is not limited to and uses at sand setting equipment, still can be applied to just heavy device, perhaps other kitchen cabinet rotating equipment's sealed department.

First, terms used in the present invention will be specifically described.

A sealing device: a member or a combination of members that prevents leakage of fluid, solid particles, or gas from between adjacent bonding surfaces or prevents intrusion of foreign matter such as dust, moisture, etc. into the interior of the machine equipment.

Self-aligning roller bearing: it has two rows of rollers, 1 common spherical raceway on the outer ring and 2 raceways on the inner ring, which are inclined at an angle with respect to the bearing axis.

O-ring sealing: after the O-ring is installed in the sealing groove, its interface is compressed and deformed by 15% -30%, under the action of medium pressure, it is moved to one side of the groove to close the gap to be sealed, so as to attain the goal of sealing.

Oil seal sealing: in a free state, the inner diameter of the oil seal is smaller than the shaft diameter, namely a certain interference magnitude exists. After the oil is sealed on the shaft, the pressure of the cutting edge and the contraction force of the self-tightening spring generate certain radial holding force on the sealing shaft, the leakage gap is broken, and the purpose of sealing is achieved.

Shaft sleeve: the cylindrical mechanical part sleeved on the rotating shaft mainly plays a role in protecting the main shaft from being abraded.

Next, a sealing device according to an embodiment of the present invention will be described in detail with reference to fig. 1 in conjunction with fig. 2 to 3.

As shown in fig. 1, the sealing device of the present invention includes a motor reducer, which is disposed on the upper portion of the sealing device and fixed on a reducer bracket; the transmission shaft is connected with the motor reducer, and the reducer bracket is hermetically connected with a bearing seat arranged in the middle of the sealing device; the pair of bearings are arranged in the bearing seats and used for automatically aligning; the plurality of oil seals are respectively arranged in a bearing gland above the bearing, below the bearing seat and in a cavity of the stuffing box and are used for preventing impurities from entering the bearing seat; the stuffing box is arranged below the sealing device and connected with the bearing seat; and the multiple groups of packing are arranged above the barrel connecting flange of the sealing device and used for preventing gas leakage.

The novel sealing device of the embodiment mainly comprises a self-aligning roller bearing, a rotary shaft lip-shaped sealing ring, a packing box, a packing gland and the like. The sealing device that is used for sand setting equipment is shown in the figure, however the utility model provides a sealing device is not restricted to using at sand setting equipment, still can be applied to and just sink the device, perhaps other kitchen cabinet rotate the sealed department of equipment.

Specifically, the motor reducer 1 is connected with the transmission shaft 4 through the coupler 2, the motor reducer is fixed on the reducer support 3, and the reducer support and the bearing seat 10 are in sealing connection through the gasket 5. A set of self-aligning roller bearings 6 are installed in the bearing seat 10, have automatic self-aligning performance, and can reduce the installation angle error of the shaft 4 and the bearing seat 10 or the influence of the bending of the transmission shaft 4. The upper part of the bearing prevents impurities such as dust from entering the bearing seat through a rotary shaft lip-shaped sealing ring 8 arranged in a bearing gland 18. Meanwhile, a rotary shaft lip-shaped sealing ring 8 is arranged below the bearing seat, so that impurities such as dust can be prevented from entering the bearing seat, and lubricating oil can be prevented from leaking outside. And a group of rotary shaft lip-shaped sealing rings 8 are arranged in the cavity of the stuffing box 13, so that gas leakage of a barrel body of the sand setting equipment is prevented. Meanwhile, six groups of packing 19 are arranged above the connecting flange of the equipment barrel.

The utility model discloses utilize the design of oil blanket seal and packing, improved sealed effect, prevent better that the inside smell of sand setting equipment casing from revealing, developed the equipment of an environment-friendly type. Oil seals are commonly used for liquid seals, and are widely used for sealing lubricating oil in rotary transmissions of small size, and also for sealing air or preventing dust. In a free state, the inner diameter of the oil seal is smaller than the shaft diameter, namely a certain interference magnitude exists. After the oil is packaged on the shaft, the pressure of the cutting edge of the oil and the contraction force of the self-tightening spring generate certain radial holding force on the sealing shaft, so that the leakage interval is blocked, and the sealing purpose is achieved. The oil seal is divided into a framework type and a frameless type, and a spring type and a springless type. The oil seal is small in installation position and small in axial size, so that the machine is compact; the sealing performance is good, and the service life is long. Has certain adaptability to the vibration of the machine and the eccentricity of the main shaft. Easy disassembly, convenient maintenance and low price.

Simultaneously the utility model provides a sealing device is equipped with bearing and lubrication, can reduce the (mixing) shaft because machining error and with the influence that axle installation angle error caused. The existing sealing mode is not provided with a self-aligning roller bearing, but the self-aligning roller bearing can effectively reduce the installation angle error of a shaft and a bearing seat or the influence of shaft bending, and prolong the service life of the shaft.

In some embodiments, the oil seal comprises a rotating shaft lip seal. In particular, oil seals come in many forms, and rotary shaft lip seals are only one form of oil seal. More specifically, oil seal seals are commonly used for sealing liquids, widely used for sealing lubricating oils in rotary transmissions of small size, and also for sealing air or preventing dust. As one kind of oil seal, the rotary shaft lip-shaped sealing ring is designed and used in the utility model, the mounting position of the oil seal is small, the axial size is small, and the machine is compact; the sealing performance is good, and the service life is long. Has certain applicability to both machine vibration and main shaft eccentricity. Easy disassembly, convenient maintenance and low price. Through being equipped with the oil blanket, can prevent effectively that the barrel peculiar smell from revealing. The packing is arranged above the oil seal and is widely used for sealing liquid or gas medium reciprocating motion and rotary motion, so that dust can be prevented from entering the oil seal, the service life of the oil seal is prolonged, and the smell of the barrel can be prevented from leaking outside better.

In some embodiments, the bearing comprises a self-aligning roller bearing. Specifically, the sand setting machine transmission shaft rotates relative to the bearing seat, a bearing is needed, the transmission part is supported by means of rolling contact between bearing elements, and the sand setting machine transmission shaft has the advantages of being small in sliding resistance, low in power consumption, easy to start and the like. The utility model discloses well self-aligning roller bearing that designs and use has the biserial roller, and the outer lane has 1 sharing sphere raceway, and the inner circle has 2 raceways to relative bearing axis slope becomes an angle. The ingenious structure enables the self-aligning device to have the self-aligning performance, so that the self-aligning device is not easily influenced by the concentricity error of the transmission shaft and the bearing seat or the bending of the shaft, and is suitable for occasions with angle errors caused by installation errors or shaft bending. The bearing can bear radial load and axial load with bidirectional action. Therefore, the self-aligning roller bearing can well protect the transmission shaft and prolong the service life of equipment. Meanwhile, the bearing box body is provided with a lubricating connecting pipe, lubricating oil is introduced to reduce friction of the dynamic and static parts of the bearing, and the lubricating oil mainly acts on the bearing in three aspects of lubrication, cooling and noise reduction. Oil seals are arranged above and below the bearings to prevent lubricating oil from leaking.

The structure shown in fig. 2 is mainly to prevent leakage of bearing lubrication oil, while the structure shown in fig. 3 is mainly to prevent leakage of gas inside the equipment cylinder. Wherein, node I and node II are all established on a major axis, and node I department installation bearing is sealed, and the outer tape bearing is sealed. The node II is connected with the equipment cylinder body and provided with a seal for sealing the peculiar smell in the equipment cylinder body.

In some embodiments, the seal further comprises a bushing disposed below the seal, wherein the bushing is fixed to the drive shaft. Specifically, the shaft sleeve 15 is fixed on the transmission shaft 4 through a set screw to serve as a sealing surface, so that replacement after later-period abrasion is facilitated.

In some embodiments, an O-ring is disposed between the bushing and the driveshaft for sealing the bushing. Specifically, an O-ring 14 is provided between the sleeve 15 and the propeller shaft 4 to seal the sleeve.

In some embodiments, spacer rings are provided between the bearings for positioning the bearings. Specifically, a spacer ring 11 is installed between the two self-aligning roller bearings to play a role of positioning the bearings.

In some embodiments, the sealing device further comprises an annular ring disposed above the pair of bearings, the annular ring is provided with an annular groove and a through hole, and the upper annular ring is connected with the oil cup through the through hole disposed on the bearing seat, so that the lubricating oil enters the bearings through the annular groove and the through hole on the annular ring. Specifically, the ring 9 is provided with a ring groove and a through hole, one ring is arranged above each bearing, the ring above the bearing is connected with the oil cup 7 through the through hole arranged on the bearing seat 10, and lubricating oil enters the bearing through the ring groove and the through hole on the ring to lubricate the bearing. The bearing is axially positioned by a lock nut 16 and a lock washer 17.

In some embodiments, the stuffing box and the sealing surface of the bearing housing are provided with O-rings. Specifically, a shaft sleeve 15 and an O-shaped ring 14 are arranged below a stirring shaft of the sand setting equipment, a stuffing box 13 is connected with a bearing seat 10, and a sealing surface is provided with the O-shaped ring 14 for sealing. The middle part is provided with a hole ring 9, sealing gas enters the hole ring 9 from an air inlet pipe 20 and enters the packing through the ring groove and the through hole, the sealing gas has certain pressure, and leakage is prevented by pressure difference between the sealing gas and the shell.

In addition, a packing gland 12 is mounted above the equipment cylinder for compressing the packing at the cylinder, and a bearing gland 18 is mounted at the bearing for compressing the seal there.

The utility model provides a sealing device is not limited to and uses at sand setting equipment, still can be applied to just heavy device, perhaps other kitchen cabinet rotating equipment's sealed department.

The utility model provides a novel sealing device, which improves the sealing effect, better prevents the smell inside the sand setting equipment shell from leaking, and develops an environment-friendly equipment; and simultaneously, the utility model provides a sealing device is equipped with self-aligning roller bearing and lubrication, can reduce the (mixing) shaft because machining error and with the influence that the installation angle error of axle caused.

The utility model provides a sealing device has following beneficial technological effect: the sealing device is provided with the self-aligning roller bearing, so that the installation angle error of the shaft and the bearing seat or the influence of shaft bending can be effectively reduced; the sealing device is provided with the shaft sleeve, so that the shaft sleeve is convenient to replace after being worn in the later period, and the service life of the shaft is prolonged; the sealing device is provided with the hole ring, so that the lubricating oil enters the bearing through the ring groove and the through hole on the hole ring, and the service performance of the bearing is ensured; the sealing device is provided with the rotary shaft lip-shaped sealing ring, so that the function of preventing lubricating oil from leaking outwards is achieved, and impurities such as dust and the like are prevented from entering the bearing seat; the sealing device is provided with the sealing air inlet pipe, so that the peculiar smell can be better prevented from leaking; the sealing surface of the sealing device is provided with the O-shaped ring seal, and the O-shaped ring is moved to one side of the groove under the action of medium pressure after being arranged in the sealing groove to seal the gap to be sealed, thereby achieving the purpose of sealing.

Although the example embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the above-described example embodiments are merely illustrative and are not intended to limit the scope of the present invention thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention. All such changes and modifications are intended to be included within the scope of the present invention as claimed in the appended claims.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the method of the present invention should not be interpreted as reflecting an intention that: rather, the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.

It will be understood by those skilled in the art that all of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where such features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

The above description is only for the specific embodiments of the present invention or the description of the specific embodiments, the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. A seal assembly, comprising:

the motor speed reducer is arranged at the upper part of the sealing device and is fixed on the speed reducer bracket;

the transmission shaft is connected with the motor reducer, and the reducer bracket is hermetically connected with a bearing seat arranged in the middle of the sealing device;

the pair of bearings are arranged in the bearing seats and used for automatically aligning;

the plurality of oil seals are respectively arranged in a bearing gland above the bearing, below the bearing seat and in a cavity of the stuffing box and are used for preventing impurities from entering the bearing seat;

the stuffing box is arranged below the sealing device and connected with the bearing seat; and

and the multiple groups of packing are arranged above the barrel connecting flange of the sealing device and used for preventing gas leakage.

2. The seal arrangement of claim 1, wherein the oil seal comprises a rotary shaft lip seal.

3. The sealing device of claim 1, wherein the bearing comprises a self-aligning roller bearing.

4. The seal of claim 1, further comprising a bushing disposed below the seal, wherein the bushing is secured to the drive shaft.

5. A seal arrangement according to claim 4, wherein an O-ring is provided between the sleeve and the drive shaft for sealing the sleeve.

6. The seal of claim 1, further comprising a spacer ring disposed between the pair of bearings for positioning the bearings.

7. The seal of claim 1, further comprising an annular ring disposed above and between said pair of bearings, said annular ring having an annular groove and a through hole, said annular ring above being connected to said cup by said through hole disposed in said housing, such that lubricant enters said bearings through said annular groove and said through hole in said annular ring.

8. A sealing arrangement according to claim 1, wherein the stuffing box and the sealing surface of the bearing housing are provided with O-rings.

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