CN217462561U - Front pump with honeycomb sealing ring - Google Patents

Abstract

The utility model discloses a front pump with honeycomb sealing ring, which comprises a pump shaft, a pump cover and a pump body, wherein the middle part of the inner side of the pump body is provided with a shaft sleeve, the inner side of the shaft sleeve is fixedly provided with the pump shaft, the middle part of the outer wall of the pump shaft is fixedly provided with an impeller, the two ends of the pump shaft are respectively and rotatably connected with a sliding bearing part and a thrust bearing part, the outer side of the pump body is connected with the pump cover through bolt and nut threads, the sliding bearing part and the thrust bearing part are respectively and threadedly connected with the bottom ends of the two sides of the pump cover, the middle parts of the two sides of the pump cover are respectively and threadedly connected with a mechanical sealing body driving end and a mechanical sealing body free end, the middle parts of the inner side of the mechanical sealing body driving end and the middle part of the inner side of the mechanical sealing body free end are respectively and threadedly provided with a mechanical sealing part, the middle part of the inner side of the pump cover is threadedly connected with a sealing ring, through the front pump with the honeycomb sealing ring, the friction resistance and the volume loss can be reduced, and the operation efficiency of the front pump is improved.

Description

Front pump with honeycomb sealing ring

Technical Field

The utility model relates to a leading pump technical field specifically is a leading pump with cellular sealing ring.

Background

The pre-pump is mainly used for increasing the pressure at the inlet of the feed pump and preventing the feed pump from generating cavitation. The rotation speed of the front pump is low, and the double-suction structure is adopted, so that the cavitation erosion resistance is good. The preposed pump is a double-suction single-row closed single-stage centrifugal pump, the shell of the preposed pump is of a horizontal middle-open structure, and the outlet and the inlet of the pump are both arranged at the lower part of the pump shell, so that the maintenance of the preposed pump is facilitated. The preposed pump provides inlet pressure for a boiler feed pump, ensures important equipment for safe and stable operation of a feed pump unit, and can be used for feeding boiler water and also can be used as other clean water pumps.

The prior front pump is simple in structure mostly, the running efficiency of the front pump is low, a part of energy is lost at the opening ring of a front pump impeller front edge suction inlet, meanwhile, smooth sealing rings are adopted mostly by the prior front pump sealing rings, the volume loss is large, the pump efficiency is low, the wear resistance of the front pump is not enough, the stability is poor, the loss is large after the front pump is used for a long time, the service life of the front pump is influenced, the front pump is not convenient to replace and maintain, and the practicability of the front pump is remained to be improved.

Disclosure of Invention

An object of the utility model is to provide a pre-pump with cellular sealing ring, with the current pre-pump who proposes in solving above-mentioned background art, most simple structure, pre-pump operating efficiency is on the low side, the choma department of leading pump impeller leading edge sunction inlet has lost some energy, and simultaneously, smooth sealing ring is mostly adopted to present pre-pump sealing ring, the volume loss is big, pump efficiency is low, the wear resistance of pre-pump is not enough, stability is relatively poor, the loss is great after long-time the use, the life of pre-pump has been influenced, be convenient for change and maintenance yet, the practicality of pre-pump remains the problem that improves.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a pre-pump with honeycomb sealing ring, includes the pump shaft, the pump cover and the pump body, the inboard middle part of the pump body is equipped with the axle sleeve, the inboard fixed mounting of axle sleeve has the pump shaft, the middle part fixed mounting of pump shaft outer wall has the impeller, the both ends of pump shaft are rotated respectively and are connected with slide bearing part and footstep bearing part, there is the pump cover outside of the pump body through bolt and nut threaded connection, slide bearing part and footstep bearing part threaded connection respectively in the bottom of pump cover both sides, there are mechanical seal drive end and mechanical seal letter free end in the middle part of pump cover both sides threaded connection respectively, mechanical seal part is installed to the inboard middle part of mechanical seal drive end and the inboard equal screw thread in middle part of mechanical seal letter free end, the inboard middle part threaded connection of pump cover has the sealing ring.

As a preferred technical scheme of the utility model, slide bearing component's inboard and thrust bearing component's inboard all are equipped with the oil shelves, through the oil shelves, can prevent leaking of lubricating oil and prevent that the foreign matter from getting into the inside lubricating oil that pollutes of bearing.

As an optimized technical scheme of the utility model, be equipped with o type circle between the pump body and the pump cover, through o type circle, can improve the leakproofness of connecting between the pump body and the pump cover.

As an optimal technical scheme of the utility model, be equipped with the winding pad between pump cover and the mechanical seal letter body free end, through the winding pad, can be connected the leakproofness between pump cover and the mechanical seal letter body free end.

As a preferred technical scheme of the utility model, the cavity in a plurality of honeycomb has been seted up to the inboard of sealing ring, and through the cavity in a plurality of honeycomb, can reduce the sealing ring and the inside wear area of preposition pump to reduce and let out leakage quantity, improved sealed effect.

As an optimal technical scheme of the utility model, the impeller is double suction formula centrifugal impeller, impeller and pump shaft are made by the stainless steel, can improve the corrosion resisting property of impeller and pump shaft, improve life.

As an optimal technical scheme of the utility model, mechanical seal part closely laminates with the pump shaft, can adopt collection dress formula mechanical seal to the pump shaft, promotes the bearing seal effect.

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

1. through the cooperation of sealing ring and leading pump impeller, can prevent that impeller outlet end medium from flowing backwards to the impeller entrance point because of self pressure is greater than import department pressure, play the sealed effect promptly, can reduce the wearing and tearing contact surface simultaneously to play wear-resisting effect and avoid leading pump to damage.

2. The sealing ring adopts the honeycomb formula design, can realize the minimizing of the unilateral clearance of sealing ring and impeller to the control leaks the quantity, thereby reduces the inside volume loss of leading pump, and improves the efficiency of pump to a certain extent.

Drawings

Fig. 1 is a front sectional view of the present invention;

FIG. 2 is an internal structure view of the sealing ring of the present invention;

fig. 3 is a perspective view of the sealing ring of the present invention.

In the figure: 1. a sliding bearing member; 2. oil grade; 3. a mechanical seal member; 4. a mechanical seal body driving end; 5. a pump shaft; 6. a pump cover; 7. a winding pad; 8. an o-shaped ring; 9. a pump body; 10. a bolt and a nut; 11. a thrust bearing member; 12. mechanically sealing the free end of the box body; 13. a shaft sleeve; 14. an impeller; 15. a seal ring; 16. a honeycomb inner cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a pre-pump with a honeycomb seal ring, including a pump shaft 5, pump cover 6 and pump body 9, the inboard middle part of the pump body 9 is equipped with axle sleeve 13, the inboard fixed mounting of axle sleeve 13 has pump shaft 5, the middle part fixed mounting of the 5 outer walls of pump shaft has impeller 14, the both ends of pump shaft 5 rotate respectively and are connected with slide bearing part 1 and footstep bearing part 11, there is pump cover 6 outside through bolt and nut 10 threaded connection of the pump body 9, slide bearing part 1 and footstep bearing part 11 threaded connection respectively are in the bottom of the 6 both sides of pump cover, the middle part of the 6 both sides of pump cover is threaded connection respectively has mechanical seal body drive end 4 and mechanical seal letter free end 12, mechanical seal part 3 is installed to the inboard middle part of mechanical seal body drive end 4 and the inboard equal screw thread in middle part of mechanical seal letter free end 12, the inboard middle part threaded connection of pump cover 6 has sealing ring 15.

Preferably, the inner side of the sliding bearing member 1 and the inner side of the thrust bearing member 11 are provided with oil stops 2, and the oil stops 2 can prevent leakage of lubricating oil and prevent foreign matters from entering the inside of the bearing and polluting the lubricating oil.

Preferably, an o-shaped ring 8 is arranged between the pump body 9 and the pump cover 6, and the sealing performance of connection between the pump body 9 and the pump cover 6 can be improved through the o-shaped ring 8.

Preferably, a winding pad 7 is arranged between the pump cover 6 and the free end 12 of the mechanical sealing box, and the tightness of the connection between the pump cover 6 and the free end 12 of the mechanical sealing box can be realized through the winding pad 7.

Preferably, a plurality of honeycomb inner cavity 16 has been seted up to the inboard of sealing ring 15, through a plurality of honeycomb inner cavity 16, can reduce the sealing ring 15 and the inside wearing and tearing area of pre-pump to reduce and let out leakage quantity, improved sealed effect.

Preferably, the impeller 14 is a double-suction centrifugal impeller, and the impeller 14 and the pump shaft 5 are both made of stainless steel, so that the corrosion resistance of the impeller 14 and the pump shaft 5 can be improved, and the service life of the impeller is prolonged.

Preferably, the mechanical seal part 3 is tightly attached to the pump shaft 5, and the pump shaft 5 can be integrally mechanically sealed, so that the shaft seal effect is improved.

When in specific use, the utility model relates to a front pump with honeycomb sealing ring, the main body of the front pump is composed of a pump body 9, a pump cover 6 and a pump shaft 5, the main body can be connected with the pump body 9 through a shaft sleeve 13 arranged on the pump shaft 5, meanwhile, two ends of the pump shaft 5 are provided with a sliding bearing part 1 and a thrust bearing part 11, the stable operation of the front pump can be ensured, the bearing is generally lubricated by thin oil, simultaneously, an oil baffle 2 is arranged inside the sliding bearing part 1 and the thrust bearing part 11, the leakage of lubricating oil can be prevented, foreign matters can be prevented from entering the bearing to pollute the lubricating oil, an impeller 14 is connected with the pump shaft 5 through a key, the impeller 14 is a double-suction centrifugal impeller, the double-suction structure can ensure that the axial thrust of the impeller 14 is basically balanced, the residual axial thrust is very small, a special axial thrust balancing device is not needed, and the impeller 14 is matched with the front pump through a sealing ring 15, can prevent the medium at the outlet end of the impeller 14 from flowing back to the inlet end of the impeller 14 because the self pressure is greater than the pressure at the inlet, namely, the sealing function is realized, and meanwhile, the abrasion contact surface can be reduced, thereby the abrasion-resistant function is realized, the damage of the front pump is avoided, the sealing ring 15 adopts the honeycomb design, the minimization of the unilateral clearance between the sealing ring 15 and the impeller 14 can be realized, thereby the leakage quantity is controlled, thereby the volume loss inside the front pump is reduced, and the efficiency of the pump is improved to a certain extent, the shaft seal of the pump shaft 5 adopts the integrated mechanical seal which is composed of a mechanical seal body driving end 4 and a mechanical seal body free end 12, the mechanical seal body driving end 4 and the mechanical seal body free end 12 are connected with the pump shaft 5 through the mechanical seal part 3, the water in the pump can be prevented from flowing out along the pump shaft 5, the space between the pump cover 6 and the pump body 9 and the space between the mechanical seal body free end 12 are sealed by an o-shaped ring 8 or a winding gasket 7, the sealing effect of the front pump is further improved, the working efficiency of the front pump is improved, the sealing ring 15 is convenient to detach and replace, and convenience is brought to maintenance of the front pump.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (7)

1. The utility model provides a leading pump with honeycomb sealing ring, includes pump shaft (5), pump cover (6) and pump body (9), its characterized in that: the pump comprises a pump body (9), a shaft sleeve (13) is arranged in the middle of the inner side of the pump body (9), a pump shaft (5) is fixedly arranged on the inner side of the shaft sleeve (13), an impeller (14) is fixedly arranged in the middle of the outer wall of the pump shaft (5), two ends of the pump shaft (5) are respectively connected with a sliding bearing component (1) and a thrust bearing component (11) in a rotating mode, the outer side of the pump body (9) is connected with a pump cover (6) through bolt nuts (10) in a threaded mode, the sliding bearing component (1) and the thrust bearing component (11) are respectively in threaded connection with the bottom ends of two sides of the pump cover (6), the middle portions of two sides of the pump cover (6) are respectively in threaded connection with a mechanical sealing body driving end (4) and a mechanical sealing body free end (12), and mechanical sealing components (3) are respectively installed in the middle portions of the inner side of the mechanical sealing body driving end (4) and the inner side of the mechanical sealing body free end (12) in a threaded mode, and the middle part of the inner side of the pump cover (6) is in threaded connection with a sealing ring (15).

2. The pre-pump with honeycomb seal ring of claim 1, wherein: and oil baffles (2) are arranged on the inner sides of the sliding bearing component (1) and the thrust bearing component (11).

3. The pre-pump with honeycomb seal ring of claim 1, wherein: an o-shaped ring (8) is arranged between the pump body (9) and the pump cover (6).

4. The pre-pump with honeycomb seal ring of claim 1, wherein: and a winding pad (7) is arranged between the pump cover (6) and the free end (12) of the mechanical sealing box body.

5. The pre-pump with honeycomb seal ring of claim 1, wherein: the inner side of the sealing ring (15) is provided with a plurality of honeycomb inner cavities (16).

6. The pre-pump with honeycomb seal ring of claim 1, wherein: the impeller (14) is a double-suction centrifugal impeller, and both the impeller (14) and the pump shaft (5) are made of stainless steel.

7. The pre-pump with honeycomb seal ring of claim 1, wherein: the mechanical sealing part (3) is tightly attached to the pump shaft (5).

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