CN217206992U - Bearing box, bearing box sealing system and split pump - Google Patents

Abstract

The application relates to the technical field of centrifugal pump bearing sealing, and particularly discloses a bearing box, a bearing box sealing system and a split pump, wherein the bearing box is used for being sleeved on a rotating shaft, and the rotating shaft is provided with a bearing and a shaft seal assembly; the second body is located one side of the first body, which is far away from the bearing chamber, and is used for being abutted against the shaft seal assembly so as to axially limit the shaft seal assembly. The bearing box, the bearing box sealing system and the axially-opened pump are smaller in overall axial size, structures such as a protective cover and a shaft seal gland are omitted, the number of parts is reduced, assembly is more convenient and faster, cost is reduced, and the bearing box, the bearing box sealing system and the axially-opened pump are more stable and reliable integrally.

Description

Bearing box, bearing box sealing system and split pump

Technical Field

The application relates to the technical field of centrifugal pump bearing sealing, in particular to a bearing box, a bearing box sealing system and a split pump.

Background

The split pump is one of the most common pump devices, and is widely applied to engineering projects such as industry, municipal water supply, agricultural irrigation, water taking and water regulating and the like due to high efficiency, large flow and symmetrical and stable structure. The split pumps are classified into small, medium, large and ultra-large split pumps according to the parameters of the pumped flow, the pump lift, the outlet caliber of the pump body, the diameter of the impeller and the like.

The split pump is symmetrical in structure, relatively simple in component design, and mainly comprises a pump body, a rotor, a bearing assembly, a sealing system for providing sealing protection for the bearing assembly and the like.

The sealing system mainly comprises a shaft seal assembly, a sealing ring and other structures at a bearing box. Such as the solution shown in fig. 1, which comprises a shaft seal assembly 2, a protective cover 3 and a bearing assembly 1. In this solution, each functional module must be provided with one or more specific components, which individually perform specific functions, for example, fixing the shaft seal assembly 2, and which must be performed by the individual shaft seal gland 5, which has the problem of difficult installation.

The defects of the traditional design scheme are obvious, the number of parts is large, the disassembly and the assembly are complex, the supply chain management is complex, the design work is heavy, the axial size of the split pump is large, a large installation space is required, the parts of the pump are high in material consumption, and the product cost of the split pump is increased directly. Meanwhile, the rigidity of the rotor is reduced due to the long axial span, and the rotor and the pump shaft deform more in the operation process, so that the stable operation of the split pump is not facilitated.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model provides a bearing box, bearing box sealing system and well turn on pump integrates the bearing seal gland among the prior art on the bearing box, has solved among the prior art problem that well turn on pump sealing system axial dimensions is big, part is large in quantity.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a bearing box is used for being sleeved on a rotating shaft, a bearing and a shaft seal assembly are arranged on the rotating shaft, the bearing box comprises a first body and a second body which are integrally arranged along the axis of the rotating shaft, wherein a bearing chamber is arranged on one side, away from the second body, of the first body and used for mounting the bearing; the second body is located one side of the first body, which is far away from the bearing chamber, and is used for being abutted against the shaft seal assembly so as to axially limit the shaft seal assembly.

In one embodiment, the first body is provided with an inner hole for supporting the rotating shaft, the inner hole is communicated with the bearing chamber, and a first sealing structure for limiting the flow of a medium is arranged at the inner hole of the first body.

In one embodiment, the first seal structure includes a first shield groove disposed on a bore wall of the inner bore of the first body.

In one embodiment, the number of the first guard grooves is 0-4.

In one embodiment, the second body is also provided with an inner hole for supporting the rotating shaft, and the inner hole is provided with a second sealing structure for limiting the flow of the medium.

In one embodiment, the second seal structure includes a second shield groove disposed on a bore wall of the second body bore.

In one embodiment, the number of the second guard grooves is 0-4.

In one embodiment, the gap between the hole wall of the inner hole of the first body and the second body for supporting the rotating shaft and the rotating shaft is 0.2-0.8 mm.

On the other hand, the utility model also discloses a bearing box sealing system, its characterized in that: the bearing box comprises a rotating shaft, a shaft seal assembly arranged on the rotating shaft and the bearing box arranged on the rotating shaft;

and a protective structure is arranged between the first sealing structure and the second sealing structure on the bearing box and used for discharging media between the first sealing structure and the second sealing structure.

In one embodiment, the guard structure comprises:

the liquid accumulation groove is formed in the hole wall of the second body, and a liquid discharge outlet communicated with the liquid accumulation groove is formed in the second body;

and the water retaining groove is arranged on the rotating shaft and is opposite to the liquid accumulation groove.

In one embodiment, two liquid discharge outlets are arranged, and the two liquid discharge outlets are respectively positioned at the upper end and the lower end of the liquid accumulation tank.

In one embodiment, the number of the water retaining grooves is 1-3.

In one embodiment, an included angle a between a side wall of the water retaining groove close to one side of the shaft seal assembly and a bottom wall of the water retaining groove is larger than 90 degrees.

In one embodiment, the included angle a is between 100 and 165 degrees.

In one embodiment, an included angle B between a side wall of the water retaining groove on a side away from the shaft seal assembly and a bottom wall of the water retaining groove is smaller than or equal to 90 degrees.

In addition, the utility model also discloses a split pump, which comprises a pump body and the bearing box;

the pump body is provided with a matching hole, and a second body on the bearing box is installed in the matching hole, so that the matching hole and the first body form protection at the periphery of the second body.

The beneficial effect of this scheme:

in the scheme, the first body is equivalent to a bearing box in a traditional structure and plays roles in supporting and limiting the bearing; the second body is equivalent to a shaft seal gland in a traditional structure, plays an axial limiting role in the shaft seal assembly, integrates the traditional bearing box and the shaft seal gland in one structure, simplifies the number of parts, not only enables the device to be assembled more conveniently and rapidly, greatly reduces the cost, but also enables the device to be integrally more stable and reliable.

Drawings

FIG. 1 is a schematic diagram of a seal system for a split pump of the prior art;

fig. 2 is a schematic structural diagram of an embodiment of the bearing housing of the present invention;

fig. 3 is a cross-sectional view of an embodiment of the bearing housing of the present invention;

FIG. 4 is a cross-sectional view of an embodiment of the bearing housing seal system of the present invention;

fig. 5 is a partially enlarged view of C in fig. 4.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the invention in a schematic manner, and only the components related to the invention are shown in the drawings rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, quantity and proportion of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

The structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the purpose which can be achieved by the present invention.

References in this specification to "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential", etc., indicate orientations and positional relationships based on those shown in the drawings, and are for convenience only to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The existing split pump sealing system is large in number of parts, so that the sealing system is complex in assembling and disassembling steps and high in part consumable material.

To above-mentioned problem, this embodiment provides a bearing box, has optimized structural design, accomplishes the minimizing with the axial dimensions of the sealing system of well-opening pump as far as possible, has simplified part quantity, and the dismouting is more convenient, has also reduced manufacturing cost.

FIG. 2 is a schematic diagram illustrating a bearing housing according to an exemplary embodiment.

As shown in fig. 2, fig. 3 and fig. 4, the bearing housing provided in this embodiment is configured to be sleeved on a rotating shaft 10, a bearing 30 and a shaft seal assembly 40 are disposed on the rotating shaft 10, the bearing housing 50 includes a first body 502 and a second body 501 integrally disposed along an axis of the rotating shaft 10, wherein a bearing chamber 507 is disposed on a side of the first body 502 away from the second body 501 for installing the bearing 30; the second body 501 is located on a side of the first body 502 away from the bearing chamber 507 for abutting against the shaft seal assembly 40 to axially limit the shaft seal assembly 40.

The bearing box 50 that this embodiment provided has realized under the spacing prerequisite of bearing 30 axial, has realized the axial of bearing seal subassembly 40 again spacingly, makes this device only realize the function that just can be realized to a plurality of spare parts (bearing box, bearing seal gland) in the traditional well pump sealing system through single spare part, and it compares to realize corresponding function with a plurality of spare part combinations among the prior art, and this scheme has simplified the dismouting step, makes the structure compacter, and the operation is more stable.

It should be noted that the bearing housing 50 related to the embodiment of the present disclosure may be a bearing housing 50 related to any reasonable application scenario, for example, including but not limited to a split pump in the field of centrifugal pumps, for convenience of description and understanding of readers, the following mainly takes the bearing housing 50 used in the split pump as an example, but this is not a limitation of the present disclosure.

Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

As is known, a bearing housing is a housing part that provides axial positioning, support and lubrication for the bearings.

For clarity and brevity, FIG. 2 schematically illustrates the structure of an example lower bearing housing 50, but it does not constitute a limitation of the present disclosure. Figure 4 schematically illustrates an example connection, orientation, etc. between the lower bearing housing 50 and the bearing 30, shaft seal assembly 40.

For convenience of description and convenience of understanding of the reader, the terms of orientation such as "inside", "axially inside", and the like in the present embodiment refer to the right side of the orientation shown in fig. 2, for example, the inside of the bearing 30 refers to the right side of the bearing 30; similarly, the terms of orientation such as "outboard", "axially outboard", etc. in this embodiment refer to the left side of the orientation shown in fig. 2, for example, the outboard side of the bearing 30 refers to the left side of the bearing 30. It should be noted, however, that the orientation set forth in the embodiments of the present disclosure does not affect the orientation in practical use, nor the scope of protection of the present disclosure.

It should be noted that, in order to more clearly show the effect of the bearing housing 50 provided in the present application, the following description of the bearing housing 50 is mainly given by taking the assembly thereof into a split pump as an example.

Specifically, as shown in fig. 2 to 4, an inner hole is axially penetrated through the middle portion of the bearing housing 50, and the bearing housing 50 is fitted over the rotary shaft 10 through the inner hole. In addition, in order to achieve the fixed fit between the bearing housing 50 and the pump body 20, the bearing housing 50 is usually provided with a mounting portion that matches the pump body 20, for example, in the example of fig. 2 and 4, an arc-shaped mounting plate 508 is integrally formed at the bottom of the left side of the bearing housing 50, and the mounting plate 508 at the bottom is fixedly connected to the pump body 20 by screws during assembly, so as to achieve the axial positioning of the bearing housing 50 on the rotating shaft 10.

As shown in fig. 2 to 4, in the present embodiment, the bearing housing 50 is composed of a first body 502 and a second body 501. Wherein, the first body 502 is located at the left side and is used for forming a matching relationship with the bearing 30, the bearing end cover 70 and the rotating shaft 10; the second body 501 is located on the right side of the first body 502 and is configured to be in mating relationship with the mating bore of the pump body 20, the rotary shaft 10, and the shaft seal assembly 40.

As for the first body 502, for example, as shown in fig. 2 to 4, in an example, a bearing chamber 507 for installing the bearing 30 is opened on a left end surface of the first body 502, so as to facilitate supporting and limiting the bearing 30.

Specifically, during assembly, the bearing 30 is sleeved on the rotating shaft 10 and embedded into the bearing chamber 507 of the first body 502, so that the right side of the bearing 30 is abutted against the right side wall of the bearing chamber 507, and the right limit of the bearing 30 by the bearing box 50 is realized; then, the bearing end cover 70 is inserted into the bearing chamber 507 from the left side and fixed to the bearing housing 50 by a fixing member such as a screw, so as to support and limit the bearing 30 by the bearing housing 50.

It is understood that the cooperation of the bearing 30 and the bearing housing 50 shown in fig. 4 is merely an exemplary illustration, and in other embodiments, the assembly between the bearing 30 and the bearing housing 50 may take other forms, which is not a limitation of the present disclosure.

Based on the structure of the first body 502 and the matching manner of the first body 502 with the rotating shaft 10 and the bearing 30, it can be seen that the first body 502 mainly plays a role in supporting and limiting the bearing 30.

The second body 501 is integrally formed or welded to the right side of the first body 502, and is combined with the first body 502 to form the bearing housing 50.

As shown in fig. 4, when the bearing housing 50 is fixed to the pump body 20, the right side of the second body 501 abuts against the shaft seal assembly 40, that is, the second body 501 axially limits the shaft seal assembly 40, so that the shaft seal assembly 40 is axially positioned at the right side of the bearing housing 50, and a first sealing and protecting structure is formed at the right side of the bearing housing 50.

Based on the above structure, it can be seen that, in the present embodiment, the first body 502 is equivalent to the bearing box 50 in the conventional structure, and plays a role in supporting and limiting the bearing 30; the second body 501 is equivalent to a gland of a conventional shaft seal and serves to axially limit the shaft seal assembly 40. This embodiment is integrated in a structure with traditional sealing system's bearing box and bearing seal gland, and the whole axial dimensions of the sealing system who makes on the well-opening pump is littleer, has saved structures such as bearing seal gland in the traditional structure, has retrencied part quantity, not only makes the device assembly convenient and fast more, still makes the device whole more reliable and more stable.

It should be noted that, as shown in fig. 4, in one example, when the bearing housing 50 is axially positioned, the second body 501 is integrally inserted into the fitting hole of the pump body 20, and the second body 501 forms a sealing fit with the fitting hole of the pump body 20. Therefore, in the structural form, the second body 501 and the shaft seal assembly 40 can be shielded and protected by the matching hole of the pump body 20, so that a protective cover of the shaft seal assembly 40 in the traditional structure is omitted, and the number of parts is further reduced.

In addition, in the embodiment, the bearing box 50 not only provides an axial limiting function for the bearing 30 and the shaft seal assembly 40, but also plays a role in providing a multi-layer sealing protection for the bearing 30, so that the shaft seal assembly 40 and the bearing box 50 sequentially block media on a leakage path, the sealing performance of the bearing box 50 is improved, and the cleaning of the bearing 30 is ensured.

For example, when the bearing housing provided in this embodiment is used in a split pump for pumping water, the medium refers to water between the first body 502 and the second body 501 and water inside the second body 501. It should be understood that the first body 502 blocks the right water and blocks the grease in the bearing housing 50, preventing the grease from leaking.

The sealing protection formed by the bearing housing 50 for the bearing 30 is described in detail below with reference to the drawings.

For example, as shown in fig. 4, the bearing housing 50 is integrally disposed on the rotating shaft 10 through the inner hole, it should be understood that the inner hole of the bearing housing 50 also axially penetrates the first body 502 and the second body 501, and a certain rotational clearance exists between the inner holes of the first body 502 and the second body 501 and the rotating shaft 10, and the rotational clearance should be small enough, for example, the rotational clearance is 0.2-0.8mm, that is, the clearance between the inner hole wall of the first body 502 and the second body 501 and the rotating shaft 10 is 0.2-0.8 mm.

Under the clearance that rotates in above-mentioned scope, utilize fluidic friction to hinder the effect, can play the effect that hinders the medium to pass through to a certain extent, and then can avoid the medium to reveal to bearing box 50 in from this clearance that rotates, play preliminary sealed effect.

It should be understood that the above-mentioned manner of blocking the medium flow by the rotating gap cannot achieve the best blocking effect, and therefore, other structures are further provided in the present embodiment to further block and slow the medium flow.

For example, in the present embodiment, a first sealing structure that restricts the flow of the medium is provided between the inner hole of the first body 502 and the rotary shaft 10.

The first sealing structure is disposed adjacent to the bearing 30, so that it forms a sealing protection on the path of the medium leakage, slows down the medium flow, even completely obstructs the medium flow, and provides a good sealing protection performance for the inside of the bearing housing 50.

The first sealing structure may be implemented in various forms, for example, in the prior art, additional components are often used as the main components, and specifically, a sealing ring, a dynamic and static sealing ring assembly, and the like are disposed between the inner hole wall of the bearing housing 50 and the rotating shaft 10.

Although above-mentioned traditional seal structure can be fine prevent that the medium from revealing to bearing 30 department, the dismouting of sealing washer, sound seal ring subassembly is comparatively loaded down with trivial details, has increased work load to the spare part that adds in addition has also increased the part consumptive material, leads to the cost-push.

In view of the above, in the present embodiment, the object of simplifying the structure can be achieved by integrating the first seal structure on the bearing housing 50.

For example, as shown in fig. 2 and 4, in one example, the first seal structure includes a first shield groove 504 disposed on a bore wall of the inner bore of the first body 502.

In the above example, each first protection groove 504 functions as a single groove body in a labyrinth groove provided on the sealing ring in the related art, and can slow and block the flow of the medium by a friction effect, thereby achieving a sealing protection effect.

Further, in some examples, the number of first guard trenches 504 may be 0-4. When the number of the first shield grooves 504 is zero, it is understood that the sealing protection is realized only by the rotation gap; when the number of first protection grooves 504 is greater than or equal to two, two or more first protection grooves 504 may form a labyrinth groove, and the labyrinth groove may form multiple barriers in a path of leakage of the medium, slow down the flow of the medium, or even completely block the flow of the medium, and provide good sealing protection performance for the inside of the bearing housing 50.

In addition, in the present embodiment, the first protection groove 504 is an annular groove body, and the specific structure is not limited herein, for example, the first protection groove 504 may be a rectangular groove or a circular groove.

Referring to fig. 3, in some examples, to further improve the sealing performance of the bearing housing 50, a second sealing structure that restricts the flow of the medium is provided at the inner hole of the second body 501.

The second sealing structure is the same as the first sealing structure in structure and effect, and since the above description has made the first sealing structure correspondingly, only some examples of the second sealing structure will be listed below, and detailed description will not be given.

For example, the second sealing structure includes a second shield groove 503 disposed on a wall of the bore of the second body 501.

For example, the number of second shield grooves 503 is 0 to 4.

In the above example, the second sealing structure and the first sealing structure form two extra protections on the path of the medium leakage, and the sealing performance is better. Moreover, the first protection groove 504 and the second protection groove 503 are directly formed on the bearing box 50, and compared with the prior art in which sealing rings, dynamic and static sealing rings and the like are additionally arranged to realize sealing, the number of parts is further reduced, the assembly and disassembly are more convenient, and the part consumption is reduced.

On the other hand, the embodiment also discloses a bearing box sealing system, which comprises a rotating shaft 10, a shaft seal assembly 40 arranged on the rotating shaft 10 and the bearing box 50 arranged on the rotating shaft 10;

a protective structure is further arranged between the first sealing structure and the second sealing structure on the bearing box 50, and the protective structure is used for discharging media between the first sealing structure and the second sealing structure.

As shown in fig. 4, wherein the shaft seal assembly 40 is axially positioned between the second body 501 and the stepped structure on the rotating shaft 10, it forms a sealing fit with the second body 501 through the sealing ring, and constitutes a first sealing protection, so that it provides a sealing protection for the bearing housing 50 at the outside of the bearing housing 50.

It should be noted that the structure of the shaft seal assembly 40 is well known in the art, such as the shaft seal assembly 40 illustrated in fig. 1, and the description of this embodiment is omitted.

In addition, considering that the shaft seal assembly 40 and the second sealing structure may fail in long-term operation, after the shaft seal assembly 40 and the second sealing structure fail, a medium may flow into between the first sealing structure and the second sealing structure, and by providing the protection structure, the medium may be discharged, so as to avoid an excessive sealing pressure borne by the first sealing structure, and ensure the sealing stability thereof.

Wherein, among the prior art, be provided with the water slinger usually between bearing box 50 and the bearing seal subassembly 40, the medium that shaft seal subassembly 40 department revealed, accessible water slinger rotatory throws away, but the water slinger is as solitary part, often installs the difficulty, easily becomes flexible, easy ageing, running noise's problem.

Therefore, in the application, the water throwing structure is directly integrated on the existing parts, and the purpose of reducing the number of the parts is achieved.

For example, in the example of fig. 2-4, the guard structure includes:

the liquid accumulating tank 505 is arranged on the hole wall of the second body 501, and the second body 501 is provided with a liquid discharge outlet 506 communicated with the liquid accumulating tank 505;

the water blocking groove 60 is provided on the rotary shaft 10, and the water blocking groove 60 is provided opposite to the liquid collecting groove 505.

In the example of fig. 2, the liquid accumulation groove 505 is an annular groove formed in the wall of the second body 501, and has a structure similar to the first protection groove 504 and the second protection groove 503, but the width and the depth of the liquid accumulation groove 505 are much larger than those of the first protection groove 504 and the second protection groove 503, so that there is enough space for discharging the medium.

In the example of fig. 4, water-retaining groove 60 is an annular groove body provided on rotating shaft 10, and is disposed opposite to effusion groove 505. The water retaining groove 60 may be configured to collect the medium leaked from the second sealing structure side to the effusion groove 505, so that a stepped barrier may be formed on the flow path of the medium, and the barrier may prevent the medium from flowing to the first body 502, thereby further preventing the medium from leaking to the bearing 30, and improving the sealing protection effect.

Therefore, when the medium breaks through the obstruction of the shaft seal assembly 40 and the second sealing structure, the medium flows into the effusion groove 505 and is blocked by the water retaining groove 60 and accumulated in the water retaining groove 60, so that the medium is prevented from leaking to the first sealing structure. And the medium in the water retaining groove 60 is thrown out from the liquid discharge outlet 506 under the action of centrifugal force when the rotating shaft 10 rotates, so that the accumulated liquid is prevented from permeating into the bearing 30.

Therefore, the embodiment establishes another defense line between the first sealing structure and the second sealing structure, and further improves the sealing protection effect of the bearing box 50.

In addition, in the example of fig. 2, the drain outlet 506 is further defined. Specifically, two liquid discharge outlets 506 are provided, and the two liquid discharge outlets 506 are located at the upper end and the lower end of the liquid collecting tank 505, respectively.

Carry out the discharge of hydrops through two upper and lower flowing back outlets 506, can promote the discharge efficiency of hydrops in hydrops groove 505, avoid the medium to pile up infiltration to bearing 30 department.

In addition, the area of the drain outlet 506 formed on the outer circumferential surface of the second body 501 by the drain outlet 506 should be large enough to ensure the draining effect of the medium, for example, the length of the drain outlet 506 is at least equal to the radius of the second body 501.

Further, the number of the water blocking grooves 60 is 1 to 3. When the number of the water retaining grooves 60 is 2-3, multiple obstacles are formed between the first sealing structure and the second sealing structure, and the protection effect is improved.

The structure of the water-stop groove 60 will be described in more detail with reference to the accompanying drawings.

As shown in FIG. 5, in one example, the angle A between the side wall of the water retaining groove 60 adjacent to one side of the shaft seal assembly 40 and the bottom wall of the water retaining groove 60 is greater than 90 degrees.

More specifically, in one example, the included angle A may be between 100 and 165 degrees.

Based on this, referring to fig. 5, it can be seen that the right side wall of the water retaining groove 60 is a bevel edge with an outer end inclined to the right, and the bevel edge is arranged to make the medium enter the water retaining groove 60 more easily, make the medium flow more smoothly, and make the medium collect in the water retaining groove 60 more easily.

As shown in FIG. 5, in one example, the angle B between the side wall of the water retaining groove 60 on the side away from the shaft seal assembly 40 and the bottom wall of the water retaining groove 60 is less than or equal to 90 degrees.

Based on this, the left side wall of the water retaining groove 60 is a vertical side or a concave side with the inner end thereof being recessed leftward, and the design can form better blocking for the medium in the water retaining groove 60, prevent the medium from continuously flowing leftward, enable the medium to be collected in the water retaining groove 60, and enable the water retaining groove 60 to better play a role of a water slinger.

As described above, the present embodiment utilizes the combination of the water retaining groove 60, the effusion groove 505 and the liquid discharge outlet 506 to realize the discharge of the leakage medium, which achieves the efficacy of the water slinger in the traditional structure and improves the protection effect. And, this implementation get rid of water structure directly at epaxial fluting, box on fluting and trompil realize, do not add spare part in addition, compare with prior art, this scheme has further retrencied the quantity of spare part, has avoided the loaded down with trivial details step of loading and unloading water ring that gets rid of, also avoids getting rid of the water ring and easily becomes flexible ageing and lead to the problem that drainage effect is not good.

On the other hand, the embodiment further discloses a split pump, which includes a pump body 20 and the above-mentioned bearing housing 50;

the pump body 20 is provided with a fitting hole, and the second body 501 of the bearing housing 50 is installed in the fitting hole, so that the fitting hole and the first body 502 of the bearing housing 50 form a protection at the periphery of the second body 501.

For example, as shown in fig. 4, when the bearing housing 50 is axially positioned, the second body 501 is entirely inserted into the fitting hole of the pump body 20.

Moreover, the second body 501 and the mating hole of the pump body 20 can form a sealing fit, the sealing fit can be realized by arranging a sealing ring between the outer wall of the second body 501 and the hole wall of the mating hole of the pump body 20, and the sealing fit can prevent the medium from leaking between the outer wall of the second body 501 and the hole wall of the mating hole.

In addition, the outer diameter of the first body 502 is larger than that of the second body 501, and when the second body 501 is fitted into the fitting hole of the pump body 20, the right side surface of the first body 502 abuts against or forms a slight gap with the side wall of the pump body 20.

Based on the above structure, the mating holes can shield the outer peripheral surface of the second body 501, the first body 502 is capped at the left end of the mating holes, and the second body 501 is shielded and protected.

Therefore, under the structural form, the second body 501 and the shaft seal assembly 40 can be shielded and protected by the matching hole and the first body 502 together, a protective cover in the traditional structure is omitted, and the number of parts of the device is further reduced.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that the technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, the scope of the present description should be considered as being described in the present specification.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (16)

1. A bearing box is used for being sleeved on a rotating shaft (10), a bearing (30) and a shaft seal assembly (40) are arranged on the rotating shaft (10), and the bearing box (50) is characterized by comprising a first body (502) and a second body (501) which are integrally arranged along the axis of the rotating shaft (10), wherein a bearing chamber (507) is arranged on one side, away from the second body (501), of the first body (502) and used for mounting the bearing (30); the second body (501) is located on one side, away from the bearing chamber (507), of the first body (502) and used for being abutted against the shaft seal assembly (40) so as to limit the shaft seal assembly (40) in the axial direction.

2. The bearing housing as claimed in claim 1, characterized in that the first body (502) is provided with an inner bore for supporting the rotary shaft (10), the inner bore communicating with the bearing chamber (507), and the inner bore of the first body (502) is provided with a first sealing structure for restricting a flow of a medium.

3. A bearing housing according to claim 2, wherein: the first seal structure includes a first shield groove (504) disposed on a bore wall of an inner bore of the first body (502).

4. A bearing housing according to claim 3, wherein: the number of the first protection grooves (504) is 0-4.

5. A bearing housing according to claim 2, 3 or 4, characterized in that: the second body (501) is also provided with an inner hole for supporting the rotating shaft (10), and a second sealing structure for limiting the flow of a medium is arranged at the inner hole.

6. The bearing housing of claim 5, wherein: the second sealing structure comprises a second protection groove (503) arranged on the hole wall of the inner hole of the second body (501).

7. The bearing housing of claim 6, wherein: the number of the second protection grooves (503) is 0-4.

8. The bearing housing of claim 1, wherein: the clearance between the hole walls of the inner holes of the first body (502) and the second body (501) for supporting the rotating shaft (10) and the rotating shaft (10) is 0.2-0.8 mm.

9. A bearing housing sealing system characterized by: comprising a rotary shaft (10) and a shaft seal assembly (40) arranged on said rotary shaft (10) and a bearing housing (50) according to any one of claims 5-7 arranged on said rotary shaft (10);

and a protective structure is arranged between the first sealing structure and the second sealing structure on the bearing box (50), and is used for discharging media between the first sealing structure and the second sealing structure.

10. The bearing housing seal system of claim 9, wherein: the protective structure includes:

the liquid accumulation tank (505) is arranged on the hole wall of a second body (501) on the bearing box (50), and a liquid discharge outlet (506) communicated with the liquid accumulation tank (505) is formed in the second body (501);

and the water retaining groove (60) is arranged on the rotating shaft (10), and the water retaining groove (60) is arranged opposite to the liquid accumulating groove (505).

11. The bearing housing seal system of claim 10, wherein: the number of the liquid discharge outlets (506) is two, and the two liquid discharge outlets (506) are respectively positioned at the upper end and the lower end of the liquid collecting tank (505).

12. The bearing housing seal system of claim 10, wherein: the number of the water retaining grooves (60) is 1-3.

13. The bearing housing seal system of claim 10, 11 or 12 wherein: and an included angle A between the side wall of the water retaining groove (60) close to one side of the shaft seal assembly (40) and the bottom wall of the water retaining groove (60) is larger than 90 degrees.

14. The bearing housing seal system of claim 13, wherein: the included angle A is between 100 and 165 degrees.

15. The bearing housing seal system of claim 10, 11 or 12 wherein: and an included angle B between the side wall of one side of the water retaining groove (60) far away from the shaft seal assembly (40) and the bottom wall of the water retaining groove (60) is less than or equal to 90 degrees.

16. A split pump, characterized in that it comprises a pump body (20) and a bearing housing (50) according to any one of claims 1 to 8;

the pump body (20) is provided with a matching hole, and a second body (501) on the bearing box (50) is installed in the matching hole, so that the matching hole and the first body (502) form protection on the periphery of the second body (501).

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