CN220185420U - Multiple protection architecture of water pump mechanical seal - Google Patents

Abstract

The utility model discloses a multiple protection structure of a water pump mechanical seal, which comprises a first sealing piece, wherein the first sealing piece is arranged between an impeller and a lower end cover of the water pump; the sealing cover is sleeved on the rotating shaft between the impeller and the mechanical seal; a second seal disposed between the seal cover and the machine seal; wherein the sealing cover is stepped from bottom to top; the bottom cover of the sealing cover is arranged above the first sealing piece. The first sealing element, the second sealing element and the sealing cover are matched for use; the mechanical seal protection device has the advantages of good mechanical seal protection effect, prolonged service life, simple structure and low use cost.

Description

Multiple protection architecture of water pump mechanical seal

Technical Field

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

Background

The mechanical seal, which is one of the main sealing forms of the pump equipment, is an important component thereof, and determines the safety, reliability and durability of the use of the pump equipment. The mechanical seal is a vulnerable part, and the failure of the mechanical seal is counted to almost account for more than half of the daily maintenance workload of the equipment.

When the medium contains sediment, a large amount of sediment enters the oil chamber at a high speed when the water pump runs for a long time, so that the mechanical seal is invalid. In the prior art, the protection structure of the organic seal is also adopted, but when more sediment exists in the medium, the sediment is not well isolated, so that solid particles are accumulated at the static ring of the organic seal, and the organic seal is damaged.

For example, a protection structure of a deep well brine pump seal is disclosed in China patent literature, and the publication number of the protection structure is CN201547009U. In the patent, a protection structure of a deep well brine pump seal is characterized in that a seal seat is connected with the end part of a submersible motor, the seal is assembled at the position, which is close to the shaft extension part of a motor end cover, of a seal, a static part of the seal is arranged in the seal seat, a rotating part is fixed on the shaft to form a seal structure of the submersible motor, a volute is connected with the 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 radial direction of the seal seat to form a seal cavity of high-pressure fresh water. The water conduit of the machine seal cavity is welded on the machine seal seat. In this patent, when containing silt in the medium, silt can cause the destruction to the machine seal, leads to the machine seal to become invalid, influences the efficiency of construction, increases use cost.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a sealing device which is used by matching a first sealing piece, a second sealing piece and a sealing cover; the mechanical seal protection device has the advantages of good mechanical seal protection effect, prolonged service life, simple structure and low use cost.

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

the multiple protection structure of the water pump mechanical seal comprises a first sealing piece, wherein the first sealing piece is arranged between an impeller and a lower end cover of the water pump; the sealing cover is sleeved on the rotating shaft between the impeller and the mechanical seal; a second seal disposed between the seal cover and the machine seal; wherein the sealing cover is stepped from bottom to top; the bottom cover of the sealing cover is arranged above the first sealing piece. When the water pump is used, sediment in a medium is subjected to first heavy protection under the action of the first sealing element, after the water pump is used for a long time, the sealing performance of the first sealing element is reduced, the bottom cover of the sealing cover is arranged on the first sealing element, when the first sealing element fails, the sediment enters the sealing cover, as the sealing cover is arranged in a step shape from bottom to top, each layer is provided with a step angle, when the sediment enters the sealing cover, the sediment is outwards diffused under the centrifugal action of high-speed rotation and can be accumulated at the step angles, the sealing cover is arranged in a plurality of layers, and each step angle can separate part of sediment and only a small amount of sediment reaching the top; by the arrangement of the second sealing piece, the last small amount of dielectric particles are blocked, and the long-term use of the water pump is protected.

Further, a spiral groove is formed in the inner wall of the sealing cover. The spiral groove is arranged to increase the containing space of the sediment, so that the sediment can be better blocked.

Further, the first sealing element is a framework oil seal. The structure adds the list, convenient to use is reliable.

Further, the second sealing element comprises a sealing ring and a rubber ring arranged on the inner wall of the sealing ring. Simple structure and reliable use.

Further, a collar is arranged between the impeller and the lower end cover. When the water pump is used, large particles of sediment in the medium can be blocked by the mouth ring, so that the service life of the first sealing element is guaranteed, and the service life of the water pump is prolonged.

Compared with the prior art, the utility model has the advantages that: the machine seal has good protection effect, prolonged service life, simple structure and low use cost.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model.

Fig. 2 is an enlarged view at a in fig. 1.

Fig. 3 is a schematic structural view of a sealing cover according to the present utility model.

Fig. 4 is another angular schematic view of fig. 3.

In the figure:

1. a first seal; 2. an impeller; 3. a lower end cap; 4. sealing cover; 5. sealing by a machine; 6. a rotating shaft; 7. a second seal; 8. step angle; 9. a spiral groove; 10. a seal ring; 11. a rubber ring; 12. and a mouth ring.

Detailed Description

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

In the description of the present utility model, it should 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 the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1, 2, 3 and 4, in an embodiment of a multiple protection structure for a water pump seal according to the present utility model, the protection structure includes a first sealing member 1, the first sealing member 1 is disposed between an impeller 2 and a lower end cover 3 of the water pump, a sealing cover 4 is disposed over the first sealing member 1, the sealing cover 4 is disposed on a rotating shaft 6 between the impeller 2 and the seal 5, a second sealing member 7 is further disposed between the sealing cover 4 and the seal 5, the sealing cover 4 is disposed in a stepped shape from bottom to top, and a bottom cover of the sealing cover 4 is disposed over the first sealing member 1. When the water pump is used, sediment in a medium is subjected to first heavy protection under the action of the first sealing element 1, after the water pump is used for a long time, the sealing performance of the first sealing element 1 is reduced, the bottom cover of the sealing cover 4 is arranged on the first sealing element 1, when the first sealing element 1 fails, the sediment enters the sealing cover 4, as the sealing cover 4 is arranged in a step shape from bottom to top, each layer is provided with a step angle 8, when the sediment enters the sealing cover 4, under the centrifugal action of high-speed rotation, the sediment is outwards diffused and can be accumulated at the step angles 8, the sealing cover 4 is arranged in a plurality of layers, and each step angle 8 can separate part of sediment, and the sediment reaching the top is only a small amount; by the arrangement of the second sealing element 7, the last few dielectric particles are blocked, and the long-term use of the water pump is protected.

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, which are views illustrating an embodiment of a multiple protection structure for a water pump seal according to the present utility model, in this embodiment, the basic parts are identical to those of the foregoing embodiments, and will not be described herein again. In this embodiment, the inner wall of the sealing cover 4 is provided with a spiral groove 9, and the installation of the spiral groove 9 increases the accommodation space of the sediment, so that the sediment can be better blocked; in this embodiment, the first sealing member 1 is a skeleton oil seal, the second sealing member 7 includes a sealing ring 10 and a rubber ring 11 disposed on an inner wall of the sealing ring 10, and the structure is simple, so that the use is convenient and reliable; meanwhile, in this embodiment, a collar 12 is disposed between the impeller 2 and the lower end cover 3, and when the water pump is used, large particles of silt in the medium are blocked by the collar 12, so that the service life of the first sealing member 1 is ensured, and the service life of the water pump is improved.

The above embodiments are merely illustrative embodiments of the present utility model, but the technical features of the present utility model are not limited thereto, and any changes or modifications made by those skilled in the art within the scope of the present utility model are included in the scope of the present utility model.

Claims (8)

1. A multiple protection architecture of water pump machine seal, its characterized in that: comprising

A first seal disposed between an impeller and a lower end cap of the water pump;

the sealing cover is sleeved on the rotating shaft between the impeller and the mechanical seal;

a second seal disposed between the seal cover and the machine seal;

wherein the sealing cover is stepped from bottom to top; the bottom cover of the sealing cover is arranged above the first sealing piece.

2. The multiple protection architecture of a water pump seal of claim 1, wherein: the inner wall of the sealing cover is provided with a spiral groove.

3. The multiple protection structure of a water pump seal according to claim 1 or 2, characterized in that: the first sealing piece is a framework oil seal.

4. The multiple protection structure of a water pump seal according to claim 1 or 2, characterized in that: the second sealing piece comprises a sealing ring and a rubber ring arranged on the inner wall of the sealing ring.

5. The multiple protection architecture of a water pump seal of claim 3, wherein: the second sealing piece comprises a sealing ring and a rubber ring arranged on the inner wall of the sealing ring.

6. The multiple protection structure of a water pump seal according to claim 1 or 2, characterized in that: a collar is arranged between the impeller and the lower end cover.

7. The multiple protection architecture of a water pump seal of claim 3, wherein: a collar is arranged between the impeller and the lower end cover.

8. The multiple protection architecture of a water pump seal of claim 4, wherein: a collar is arranged between the impeller and the lower end cover.