CN216767787U - Water pump with mechanical seal protection structure - Google Patents

Abstract

The utility model discloses a water pump with a mechanical seal protection structure, which comprises a motor assembly, a lower end cover arranged at the bottom of the motor assembly and a pump body arranged at the bottom of the lower end cover; the motor assembly comprises a transmission shaft which extends into the pump body and is connected with an impeller in the pump body; the mechanical seal is arranged on the part of the transmission shaft, which is positioned in the lower end cover; wherein the protection structure is arranged between the mechanical seal and the impeller and is arranged at a gap between the transmission shaft and the pump body; the protective structure comprises a shaft sleeve; sealing structures are arranged on the inner surface and the outer surface of the shaft sleeve; the sealing structure comprises grooves arranged on the inner surface and the outer surface and sealing packing matched with the grooves. A method of arranging a shaft sleeve between a mechanical seal and an impeller; the mechanical seal protection effect is good, the service life of the water pump is prolonged, the structure is simple, and the use cost is low.

Description

Water pump with mechanical seal protection structure

Technical Field

The utility model relates to the field of water pump manufacturing and application, in particular to a water pump with a mechanical seal protection structure.

Background

In the use of the water pump, the mechanical seal is one of the main sealing forms of the pump equipment, is an important part of the pump equipment, and determines the safety, reliability and durability of the pump equipment. The mechanical seal is a vulnerable part, and the failure of the mechanical seal accounts for over half of the daily maintenance workload of the equipment according to statistics.

When the medium contains silt, a large amount of silt enters the oil chamber at a high speed when the water pump operates for a long time, so that the mechanical seal fails. In the prior art, a protection structure of an organic seal is arranged, but when more silt exists in a medium, the silt is not well protected.

For example, a protection structure for a mechanical seal of a deep well halogen pump is disclosed in the Chinese patent literature, and the publication number is CN 201547009U. In the patent, the protection structure of the mechanical seal of the deep well brine extraction pump is characterized in that a mechanical seal seat is connected with the end part of a submersible motor, the mechanical seal is assembled at a shaft extending part close to a motor end cover, a static part of the mechanical seal is arranged in the mechanical seal seat, a rotating part is fixed on a shaft to form a sealing structure of the submersible motor, a volute is connected with the mechanical seal seat, an impeller is fixed at the shaft end and extends into a volute cavity, and a small gap is formed between the impeller and the mechanical seal seat in the radial direction to form a mechanical seal cavity of high-pressure fresh water. The mechanical seal cavity water conduit is welded on the mechanical seal seat. In this patent, when containing silt in the medium, silt can lead to the fact the destruction to the machine seal, leads to the machine to seal the inefficacy, leads to the damage of water pump even, influences the efficiency of construction, increases use cost.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a method for arranging a shaft sleeve between a machine seal and an impeller; the mechanical seal protection effect is good, the service life of the water pump is prolonged, the structure is simple, and the use cost is low.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

a water pump with a machine seal protection structure comprises a motor assembly, a lower end cover arranged at the bottom of the motor assembly and a pump body arranged at the bottom of the lower end cover; the motor assembly comprises a transmission shaft which extends into the pump body and is connected with an impeller in the pump body; the mechanical seal is arranged on the part of the transmission shaft, which is positioned in the lower end cover; wherein the protection structure is arranged between the mechanical seal and the impeller and is arranged at a gap between the transmission shaft and the pump body; the protective structure comprises a shaft sleeve; sealing structures are arranged on the inner surface and the outer surface of the shaft sleeve; the sealing structure comprises grooves arranged on the inner surface and the outer surface and sealing packing matched with the grooves. The protection structure is arranged between the mechanical seal and the impeller and is positioned at a gap between the pump body and the transmission shaft, so that silt can be effectively separated, and the mechanical seal is protected; the sealing structure is positioned on the inner surface and the outer surface of the shaft sleeve, the inner surface is in butt seal with the transmission shaft, the outer surface is in butt seal with the pump body, the inner side and the outer side are simultaneously protected, the machine seal can be effectively protected, the structure is simple, the use is convenient, and the sealing structure comprises a groove and sealing filler matched with the groove; prevent silt through above-mentioned sealing filler, simple structure, convenient to use.

Further, a collecting groove is formed in the bottom of the groove. After silt is blockked by above-mentioned sealing filler, be in quiescent condition basically, through the setting of above-mentioned collecting vat, can effectively block silt, and the silt of collecting further extrudees sealing filler, has strengthened the leakproofness, has improved life, and the protection effect is showing.

Further, the grooves are arranged in a spiral shape or in uniformly arranged circular rings. When the grooves are spirally arranged, the assembly is simple, and silt can be effectively blocked; when the rings which are uniformly arranged are arranged, the sand can be buffered between every two rings, and the effect of protecting the mechanical seal is remarkable.

Furthermore, the cross section of the groove is rectangular or circular arc. The rectangular arrangement is convenient to install, and the sealing effect is obvious; when being arc setting, above-mentioned sealing filler can slightly roll when using, has made things convenient for the collection of silt, and then has protected the machine to seal.

Furthermore, a hanging ring is arranged at the top of the motor component. The hoisting is convenient, and the use is convenient.

Furthermore, the water pump still including set up the support frame in pump body bottom. Has good supporting effect on the whole body and is suitable for various environments.

Further, the sealing packing is a packing. Low use cost and remarkable effect.

Compared with the prior art, the utility model has the advantages that: the mechanical seal of the water pump is protected, the service life of the water pump is prolonged, the structure is simple, and the use cost is low.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Fig. 2 is an enlarged view of fig. 1 at E.

Fig. 3 is a schematic view of an embodiment of the bushing of the present invention.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Fig. 5 is a schematic view of an embodiment of the bushing of the present invention.

Fig. 6 is an enlarged view at D in fig. 5.

In the figure:

1. a shaft sleeve; 2. machine sealing; 3. a water pump; 4. an impeller; 5. a groove; 6. sealing and filling; 7. collecting tank; 8. a motor assembly; 9. a lower end cover; 10. a pump body; 11. a drive shaft; 12. a hoisting ring; 13. a support frame.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

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", etc. indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, 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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the following embodiments, the used sealing packing 6 is a packing, and in other embodiments, the sealing packing may be arranged in other forms, which is not limited to this and will not be described herein again.

Referring to fig. 1, 2, 3 and 4, an embodiment of a water pump with a mechanical seal protection structure according to the present invention is shown, in this embodiment, the water pump 3 includes a motor assembly 8, a lower end cap 9 and a pump body 10, the motor assembly 8 is provided with a transmission shaft 11, a free end of the transmission shaft 11 is connected to an impeller 4 in the pump body 10, a mechanical seal 2 is provided on a portion of the transmission shaft 11 located in the lower end cap 9, and the protection structure is disposed between the mechanical seal 2 and the impeller 4 and at a gap between the transmission shaft 11 and the pump body 10, so as to effectively block silt and protect the mechanical seal 2; the sealing structure is positioned on the inner surface and the outer surface of the shaft sleeve 1, the inner surface is in butt joint sealing with the transmission shaft 11, the outer surface is in butt joint sealing with the pump body 10, the inner side and the outer side are simultaneously protected, the machine seal 2 can be effectively protected, the structure is simple, and the use is convenient; the protection structure comprises a shaft sleeve 1, the shaft sleeve 1 is arranged between the mechanical seal 2 and the impeller 4, and can effectively prevent substances such as silt in a medium and the like from entering an oil film surface of the mechanical seal 2, so that the use of the mechanical seal 2 is ensured; the sealing structures are arranged on the inner surface and the outer surface of the shaft sleeve 1, the sealing structures can effectively block silt, the structure is simple, the use is convenient, and the sealing structures comprise grooves 5 and sealing fillers 6 matched with the grooves 5; in this embodiment, the cross section of the groove 5 is rectangular, the groove 5 is spirally arranged, the rectangular arrangement can facilitate installation, the position of the sealing filler 6 is stable, sealing can be effectively performed, the structure is simple, and the use is convenient; meanwhile, in the present embodiment, the bottom of the groove 5 is provided with a collecting groove 7, the collecting groove 7 in the present embodiment is arc-shaped, and in other embodiments, the collecting groove may also be rectangular, which is not limited to this, and is not described herein again; after silt is blocked by above-mentioned sealing filler 6, be in quiescent condition basically, through the setting of above-mentioned collecting vat 7, can effectively block silt, and the silt of collecting further extrudees sealing filler 6, has strengthened the leakproofness, has improved life, and the protection effect is showing.

Referring to fig. 1, fig. 2, fig. 5 and fig. 6, an embodiment of a water pump with a mechanical seal protection structure according to the present invention is shown, in this embodiment, a basic portion is consistent with the above embodiment, and details are not repeated here. In this embodiment, the cross section of the groove 5 is arranged in an arc shape, and the grooves 5 are arranged in uniformly arranged circular rings, the arc arrangement enables the sealing filler 6 to slightly roll or creep when in use, which facilitates the collection of silt, and when the grooves are arranged in uniformly arranged circular rings, each circular ring can buffer the silt, so that the effect of the protective mechanical seal 2 is significant, and the grooves can be used in combination in different forms in other embodiments, which is not limited to this, and will not be described herein; simultaneously in this embodiment, above-mentioned motor element 8 top is equipped with a rings 12, convenient hoist and mount, facilitates the use, and above-mentioned water pump 3 still including setting up the support frame 13 in above-mentioned pump body 10 bottom, has fine supporting role to whole, is applicable to multiple environment.

The above description is only an embodiment of the present invention, but the technical features of the present invention are not limited thereto, and any changes or modifications within the technical field of the present invention by those skilled in the art are covered by the claims of the present invention.

Claims (10)

1. A water pump with a machine seal protection structure comprises a motor assembly, a lower end cover arranged at the bottom of the motor assembly and a pump body arranged at the bottom of the lower end cover; the method is characterized in that: the motor assembly comprises a transmission shaft which extends into the pump body and is connected with an impeller in the pump body; the mechanical seal is arranged on the part of the transmission shaft, which is positioned in the lower end cover;

wherein the protection structure is arranged between the mechanical seal and the impeller and is arranged at a gap between the transmission shaft and the pump body; the protective structure comprises a shaft sleeve; sealing structures are arranged on the inner surface and the outer surface of the shaft sleeve; the sealing structure comprises grooves arranged on the inner surface and the outer surface and sealing packing matched with the grooves.

2. The water pump with the mechanical seal protection structure as claimed in claim 1, wherein: the bottom of the groove is provided with a collecting groove.

3. The water pump with the mechanical seal protection structure according to claim 1 or 2, wherein: the grooves are arranged in a spiral or uniformly arranged circular ring shape.

4. The water pump with the mechanical seal protection structure according to claim 1 or 2, wherein: the cross section of the groove is rectangular or circular arc.

5. The water pump with the mechanical seal protection structure as claimed in claim 3, wherein: the cross section of the groove is rectangular or circular arc.

6. The water pump with the mechanical seal protection structure according to claim 1 or 2, wherein: the top of the motor component is provided with a hanging ring.

7. The water pump with the mechanical seal protection structure according to claim 3, wherein: a lifting ring is arranged at the top of the motor component.

8. The water pump with the mechanical seal protection structure according to claim 4, wherein: the top of the motor component is provided with a hanging ring.

9. The water pump with the mechanical seal protection structure according to claim 1 or 2, wherein: the water pump also comprises a support frame arranged at the bottom of the pump body.

10. The water pump with the mechanical seal protection structure according to claim 1 or 2, wherein: the sealing packing is a packing.

Images