CN220956817U

CN220956817U - Improved mechanical seal structure

Info

Publication number: CN220956817U
Application number: CN202323086875.1U
Authority: CN
Inventors: 姚蓉平
Original assignee: Lafa Pump Technology Ningbo Co ltd
Current assignee: Lafa Pump Technology Ningbo Co ltd
Priority date: 2023-11-15
Filing date: 2023-11-15
Publication date: 2024-05-14
Anticipated expiration: 2033-11-15

Abstract

The utility model provides an improved mechanical seal structure, and belongs to the technical field of pump seal structures. It has solved the poor problem of sealing effect of current pump seal structure. The utility model relates to an improved mechanical seal structure which comprises a shaft body, a movable ring, a mechanical seal shell, a stationary ring and a cavity. When the improved mechanical seal structure works, the movable ring synchronously rotates along with the shaft body, and because the static ring is in contact connection with the movable ring, the enhanced oil pressure in the pump shell can form thrust in the process and acts on the static ring through the cavity to enhance the extrusion force between the static ring and the movable ring, so that the static ring and the movable ring have better tightness.

Description

Improved mechanical seal structure

Technical Field

The utility model belongs to the technical field of pump sealing structures, and relates to an improved mechanical sealing structure.

Background

The oil seal is a core component for realizing the sealing of the cam rotor pump, and comprises a machine sealing shell, a static ring and a moving ring, when the oil seal applied to the cam rotor pump is installed, the static ring and the moving ring are often directly installed in the machine sealing shell, then the moving ring is connected with a rotating shaft through other parts, and in order to reduce the temperature of the contact surface of the moving ring and the static ring, oil is often required to be poured into the machine sealing shell, after the oil is poured into the machine sealing shell, certain acting force is generated in the machine sealing shell and acts on the contact surface between the static ring and the moving ring, so that the sealing property between the static ring and the moving ring is poor.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides an improved mechanical seal structure capable of improving mechanical seal effect.

The aim of the utility model can be achieved by the following technical scheme: an improved mechanical seal structure, comprising:

A shaft body;

the movable ring is sleeved on the shaft body and cannot rotate relative to the shaft body;

The machine seal shell is arranged at one end of the shaft body, a static ring is arranged on the shaft body, one end face of the static ring is connected with the movable ring in a contact mode, one end of the static ring is inserted into the machine seal shell, a cavity is formed between one end, far away from the movable ring, of the static ring and the inner wall of the machine seal shell, and the movable ring is not arranged in the machine seal shell.

In the improved mechanical seal structure, the shaft body is detachably connected with the bolts, and the slots for inserting the bolts are formed in the inner wall of the movable ring.

In the improved mechanical seal structure, the stationary ring comprises a top ring and a tail ring, the top ring and the tail ring are integrally formed, the tail ring is inserted into the mechanical seal shell, and the outer diameter of the top ring is larger than that of the tail ring.

In the above-mentioned improved mechanical seal structure, the end face of the top ring facing the moving ring is provided with a flat ring surface and an inclined ring surface, wherein the inclined ring surface is connected with the flat ring surface, and the flat ring surface is connected with the moving ring in a contact manner.

In the improved mechanical seal structure, the housing cavity is arranged in the mechanical seal shell, and the corrugated spring is arranged between the end face of the top ring facing the tail ring and the bottom face of the housing cavity.

In the improved mechanical seal structure, a first sealing ring is arranged between the movable ring and the shaft body.

In the improved mechanical seal structure, a second sealing ring is arranged between the tail ring and the mechanical seal shell.

In the above-mentioned improved mechanical seal structure, the pump further comprises a pump shell, the mechanical seal shell is inserted into the pump shell, and the mechanical seal shell is detachably connected with the pump shell.

In the improved mechanical seal structure, the cavity is communicated with the inside of the pump shell.

In the improved mechanical seal structure, a third sealing ring is arranged between the mechanical seal shell and the pump shell.

Compared with the prior art, the utility model has the following beneficial effects:

When the improved mechanical seal structure works, the movable ring synchronously rotates along with the shaft body, and because the static ring is in contact connection with the movable ring, the enhanced oil pressure in the pump shell can form thrust in the process and acts on the static ring through the cavity to enhance the extrusion force between the static ring and the movable ring, so that the static ring and the movable ring have better tightness.

Drawings

FIG. 1 is a schematic view of the external structure of the improved mechanical seal structure of the present utility model.

Fig. 2 is an enlarged schematic view of another view of fig. 1.

Fig. 3 is a cross-sectional view of fig. 2 at A-A.

Fig. 4 is an enlarged schematic view of the structure of fig. 3 at B.

Fig. 5 is a schematic structural view of a stationary ring.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1 to 5, an improved mechanical seal structure of the present utility model includes a shaft body 100, a moving ring 200, a mechanical seal case 300, a stationary ring 400, and a cavity 600.

The movable ring 200 is sleeved on the shaft body 100, the movable ring 200 cannot rotate relative to the shaft body 100, the machine seal shell 300 is mounted at one end of the shaft body 100, the stationary ring 400 is mounted on the shaft body 100, one end face of the stationary ring 400 is in contact connection with the movable ring 200, one end of the stationary ring 400 is inserted into the machine seal shell 300, a cavity 600 is formed between one end, far away from the movable ring 200, of the stationary ring 400 and the inner wall of the machine seal shell, the movable ring 200 is not in the machine seal shell 300, the movable ring 200 is exposed in the air, and in operation, the movable ring 200 synchronously rotates along with the shaft body 100, and external thrust acts on the stationary ring 400 through the cavity 600 due to the contact connection of the stationary ring 400 and the movable ring 200, so that extrusion force between the stationary ring 400 and the movable ring 200 is enhanced, and the stationary ring 400 and the movable ring 200 have good sealing performance.

The shaft body 100 is detachably connected with the bolt 110, and the slot 210 for inserting the bolt 110 is formed in the inner wall of the moving ring 200, so that the moving ring 200 is limited to rotate relative to the shaft body 100 by the above structure, and the moving ring 200 can rotate synchronously when the shaft body 100 rotates.

The stationary ring 400 includes a top ring 410 and a tail ring 420, the top ring 410 and the tail ring 420 are integrally formed, the tail ring 420 is inserted into the machine enclosure 300, the machine enclosure 300 is provided with a receiving cavity 310, when the machine enclosure 300 is installed, people need to insert the tail ring 420 into the machine enclosure 300, and make the top ring 410 be embedded into the receiving cavity 310, so as to realize the assembly of the stationary ring 400 and the machine enclosure 300, in this process, the outer diameter of the top ring 410 is larger than the outer diameter of the tail ring 420, so that when the top ring 410 abuts against the bottom of the receiving cavity 310, the bottom of the receiving cavity 310 will block the top ring 410, thereby preventing the stationary ring 400 from directly penetrating through the machine enclosure 300.

The end face of the top ring 410 facing the moving ring 200 is provided with a flat ring surface 411 and an inclined ring surface 412, wherein the inclined ring surface 412 is connected with the flat ring surface 411, the flat ring surface 411 is connected with the moving ring 200 in a contact manner, when the moving ring 200 rotates relative to the stationary ring 400, the stationary ring 400 can squeeze the moving ring 200, so that the tightness between the moving ring 200 and the stationary ring 400 is ensured, in the process, the moving ring 200 can directly rub the flat ring surface 411 of the stationary ring 400, the thickness of the top ring 410 is gradually thinned, and the outer diameter of the inclined ring 412 is gradually increased from the moving ring 200 to the tail ring 420, so that the area of the flat ring surface 411 of the stationary ring 400, which is contacted with the moving ring 200, is gradually increased in the abrasion process, and the tightness between the moving ring 200 and the stationary ring 400 is further enhanced.

The corrugated spring 320 is installed between the end surface of the top ring 410 facing the tail ring 420 and the bottom surface of the accommodating cavity 310, and when the stationary ring 400 is not subject to external thrust, the corrugated spring 320 provides elastic force for the top ring 410 and the machine enclosure 300, so as to ensure that a certain extrusion force exists between the stationary ring 400 and the moving ring 200 all the time, further ensure the tightness between the stationary ring 400 and the moving ring 200, and also prevent the moving ring 200 from reversely thrust to the stationary ring 400.

The first sealing ring 220 is arranged between the movable ring 200 and the shaft body 100, and the sealing performance between the movable ring 200 and the shaft body 100 is effectively enhanced by the arrangement of the first sealing ring 220, so that oil is prevented from leaking from a gap between the movable ring 200 and the shaft body 100.

The second sealing ring 421 is arranged between the tail ring 420 and the machine sealing shell 300, and the sealing performance between the tail ring 420 and the machine sealing shell 300 is effectively enhanced through the arrangement of the second sealing ring 421, so that oil is prevented from leaking from a gap between the tail ring 420 and the machine sealing shell 300.

The improved mechanical seal structure of the utility model also comprises a pump shell 500, the mechanical seal shell 300 is inserted into the pump shell 500, and the mechanical seal shell 300 is detachably connected with the pump shell 500, when in operation, people need to fill sufficient oil into the pump shell 500 so that the conveying part of the pump shell 500 can smoothly run.

Further, the cavity 600 is communicated with the inside of the pump casing 500, so that oil can smoothly enter the cavity 600, and when the transmission part of the pump casing 500 operates, so that the oil flows faster or the pump casing 500 is filled with a sufficient amount of oil, the pressure of the oil in the pump casing 500 increases, that is, the hydraulic pressure in the cavity 600 increases, a pushing force is formed on the end of the tail ring 420, so that the extrusion force between the top ring 410 and the moving ring 200 is increased.

A third sealing ring 510 is arranged between the machine sealing shell 300 and the pump shell 500, and the sealing effect between the machine sealing shell 300 and the pump shell 500 is effectively improved through the arrangement of the third sealing ring 510.

Further, in order to reduce the high temperature generated by friction between the moving ring 200 and the stationary ring 400, external cooling liquid drops can be adopted to fall on the contact surface between the moving ring 200 and the stationary ring 400, so as to achieve the effect of reducing the temperature.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to herein as "first," "second," "a," and the like are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of features being 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 specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; 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.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

Claims

1. An improved mechanical seal structure, comprising:

A shaft body;

2. The improved mechanical seal structure according to claim 1, wherein the shaft body is detachably connected with a bolt, and a slot for inserting the bolt is formed in the inner wall of the moving ring.

3. The improved mechanical seal of claim 1, wherein the stationary ring comprises a top ring and a tail ring, the top ring and the tail ring being integrally formed, the tail ring being inserted into the mechanical seal shell, the top ring having an outer diameter greater than an outer diameter of the tail ring.

4. An improved mechanical seal structure according to claim 3, wherein the end face of the top ring facing the moving ring is provided with a flat ring surface and an inclined ring surface, wherein the inclined ring surface is connected with the flat ring surface, and the flat ring surface is connected with the moving ring in a contact manner.

5. An improved mechanical seal structure according to claim 3, wherein a containing cavity is arranged in the mechanical seal shell, and a ripple spring is arranged between the end face of the top ring facing the tail ring and the bottom face of the containing cavity.

6. The improved mechanical seal structure according to claim 1, wherein a first sealing ring is arranged between the movable ring and the shaft body.

7. An improved machine seal structure according to claim 3, wherein a second seal ring is provided between the tail ring and the machine seal shell.

8. The improved mechanical seal of claim 1 further comprising a pump housing, wherein the mechanical seal is inserted into the pump housing and wherein the mechanical seal is removably coupled to the pump housing.

9. The improved mechanical seal of claim 8 wherein said cavity communicates with the interior of the pump housing.

10. The improved mechanical seal of claim 8, wherein a third seal ring is disposed between the mechanical seal housing and the pump housing.