CN219035107U

CN219035107U - Sand pump mechanical seal structure

Info

Publication number: CN219035107U
Application number: CN202223427935.7U
Authority: CN
Inventors: 丁海锁; 丁宇浩; 赵生涛; 陈军; 蒋鹏
Original assignee: Sichuan Fengye Petroleum Machinery Co ltd
Current assignee: Sichuan Fengye Petroleum Machinery Co ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-05-16
Anticipated expiration: 2032-12-20

Abstract

The utility model relates to a mechanical sealing structure of a sand pump, which belongs to the technical field of sand pump machinery and comprises a driving shaft and a static ring seat, wherein a static ring is arranged on the inner wall of the static ring seat. According to the utility model, when the driving shaft drives the sand pump impeller to pump slurry, the cooling water pipe on one side can transmit external cooling liquid into the cooling cavity to carry out water seal and heat dissipation, the cooling liquid can be discharged from the cooling water pipe on the other side, the second sealing rubber ring is arranged at the gap between the sand pump impeller and the static ring seat and can block most of silt and sewage, the air inlet pipe can be connected with the air pump to transmit external air into the gap between the sand pump impeller and the static ring seat and stir the second sealing rubber ring to discharge air, so that silt and sewage at the gap between the second sealing rubber ring and the sand pump impeller can be blown out by air, and the mechanical sealing structure additionally provided with the air seal can effectively prevent external silt from penetrating into the sand pump, can discharge silt at the joint, reduce abrasion of the rotating position of the sand pump and prolong the service life.

Description

Sand pump mechanical seal structure

Technical Field

The utility model relates to the technical field of sand pump machinery, in particular to a sand pump mechanical sealing structure.

Background

The sand pump is one kind of centrifugal slurry pump for conveying suspension containing sand grains, slag, etc. and has several opened impellers, and the inside lining of the pump is generally divided into two kinds of wear resisting metal and wear resisting rubber, and the high pressure water is injected into the sliding part of the pump shaft to prevent sand from entering the sliding part and to convey coarse grain solid matter liquid with granularity over 48 mesh.

Through searching, the Chinese patent with the prior publication number of CN214465068U discloses a mechanical sealing structure for a built-in type container double-end-face sand pump, and adopts a self-flushing mode, a cavity a of the utility model is supplied with oil by an independent cooling flushing oil tank, the pressure of a sealing cooling liquid circulating impeller between two groups of sealing end faces is higher than the pressure of a medium end, and the pressure of cooling flushing liquid generated when the sealing cooling liquid circulating impeller works washes the sealing end face of the medium side, so that tiny leakage of the sealing end face of the medium side is caused from the sealing cavity to the medium side, and sealing faults caused by solid particles entering the mechanical sealing end face of the medium side are avoided.

The technical scheme has the following defects that the clearance between the impeller and the sealing box is not provided with sealing protection when the sand pump mechanical sealing structure is in operation, so that mud and sand can be attached to the shaft sleeve joint, and the service life is influenced by abrasion when the sand pump is started.

In view of this, the present utility model provides a technical solution for improving and solving the above-mentioned problems, and for intensively researching and applying in cooperation with the academic theory, and finally providing a solution which has a reasonable design and can effectively improve the above-mentioned drawbacks.

The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is already known to a person skilled in the art.

Disclosure of Invention

The utility model provides a mechanical sealing structure of a sand pump, which solves the problems of the prior art, can discharge sediment at the joint and prolongs the service life.

The scheme for solving the technical problems is as follows: the utility model provides a sand pump mechanical seal structure, includes drive shaft, quiet ring seat, the inner wall of quiet ring seat is provided with quiet ring, quiet ring and quiet ring seat's clearance department is provided with sealing rubber ring No. one, the outer wall fixedly connected with moving ring of drive shaft, the left end fixedly connected with sand pump impeller of drive shaft, the inner wall of quiet ring is provided with the axle sleeve, the inside of axle sleeve is arranged in to the drive shaft, the equal fixed intercommunication in both sides of quiet ring seat has condenser tube, the right side threaded connection of quiet ring seat has sealing cap, sealing cap's inner wall left side is provided with the spring holder, the inner wall left side of spring holder is provided with No. three sealing washer, no. three sealing washer's left side is provided with extrusion spring, the top fixed intercommunication of quiet ring seat has into the trachea.

On the basis of the technical scheme, the utility model can be improved as follows.

Further, the movable ring is rotatably connected with the stationary ring, so that the driving shaft can be stably placed in the stationary ring seat.

Further, the first sealing rubber ring is of a K-shaped structure, so that a gap between the static ring and the static ring seat can be sealed.

Further, the third sealing ring is arranged at the gap between the spring seat and the sealing box cover, and the extrusion spring can extrude the spring seat to clamp and fix the third sealing ring, so that the cooling liquid in the cooling cavity is difficult to seep.

Further, the third sealing ring seals the gap between the static ring seat and the shaft sleeve.

Further, the baffle is fixedly arranged on the outer wall of the driving shaft close to the right side edge, so that external liquid can be effectively prevented from directly splashing to the gap between the sealing box cover and the shaft sleeve.

Further, the left side of quiet ring seat is provided with the rotation groove with sand pump impeller looks adaptation, and the inner wall fixed mounting in rotation groove has No. two sealing rubber rings, can shelter from quiet ring seat and sand pump impeller's clearance department, prevents that most silt sewage from directly soaking in.

Further, the clearance between the stationary ring and the sealing box cover is provided with a cooling cavity, cooling water pipes are arranged on two sides of the cooling cavity, and cooling liquid can be transferred into the cooling cavity from the upper cooling water pipe and then discharged from the bottom cooling water pipe.

The utility model provides a sand pump mechanical sealing structure, which has the following advantages:

when the driving shaft drives the sand pump impeller to carry out slurry pumping, one side cooling water pipe can transmit external cooling liquid to the cooling cavity to carry out water seal and heat dissipation, the cooling liquid can be discharged from the cooling water pipe at the other side, the gap between the sand pump impeller and the static ring seat is provided with a second sealing rubber ring which can block most of silt sewage, the air inlet pipe can be connected with the air pump to transmit external air into the gap between the sand pump impeller and the static ring seat and stir the second sealing rubber ring to discharge air, so that silt and sewage at the gap between the second sealing rubber ring and the sand pump impeller can be blown out by air, the mechanical sealing structure additionally provided with the air seal can effectively prevent external silt from penetrating into the sand pump, the silt at the transmitted joint can be discharged, the abrasion of the rotating position of the sand pump is reduced, and the service life is prolonged.

The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings. Specific embodiments of the present utility model are given in detail by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is a schematic structural diagram of a mechanical seal structure for a sand pump according to an embodiment of the present utility model;

fig. 2 is a front view of a mechanical seal structure of a sand pump according to an embodiment of the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

1. a moving ring; 2. a stationary ring; 3. a first sealing rubber ring; 4. a drive shaft; 5. a sand pump impeller; 6. a second sealing rubber ring; 7. a stationary ring seat; 8. a shaft sleeve; 9. a cooling water pipe; 10. extruding a spring; 11. a spring seat; 12. a third sealing ring; 13. sealing the box cover; 14. a baffle; 15. and (5) entering the trachea.

Detailed Description

The principles and features of the present utility model are described below with reference to fig. 1-2, the examples being provided for illustration only and not for limitation of the scope of the utility model. The utility model is more particularly described by way of example in the following paragraphs with reference to the drawings. Advantages and features of the utility model will become more apparent from the following description and from the claims. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1-2, a sand pump mechanical seal structure comprises a driving shaft 4 and a static ring seat 7, wherein a static ring 2 is arranged on the inner wall of the static ring seat 7, a first sealing rubber ring 3 is arranged at a gap between the static ring 2 and the static ring seat 7, a movable ring 1 is fixedly connected to the outer wall of the driving shaft 4, a sand pump impeller 5 is fixedly connected to the left end of the driving shaft 4, a shaft sleeve 8 is arranged on the inner wall of the static ring 2, the driving shaft 4 is arranged in the shaft sleeve 8, cooling water pipes 9 are fixedly communicated with the two sides of the static ring seat 7, a sealing box cover 13 is connected with the right side threads of the static ring seat 7, a spring seat 11 is arranged on the left side of the inner wall of the sealing box cover 13, a third sealing ring 12 is arranged on the left side of the inner wall of the spring seat 11, a compression spring 10 is arranged on the left side of the third sealing ring 12, and an air inlet pipe 15 is fixedly communicated with the top of the static ring seat 7.

Preferably, the moving ring 1 is rotatably connected with the stationary ring 2 so that the driving shaft 4 can be stably placed inside the stationary ring seat 7.

Preferably, the first sealing rubber ring 3 is of a K-shaped structure, so that the gap between the stationary ring 2 and the stationary ring seat 7 can be sealed.

Preferably, the third sealing ring 12 is arranged at the gap between the spring seat 11 and the sealing box cover 13, and the pressing spring 10 can press the spring seat 11 to clamp and fix the third sealing ring 12, so that the cooling liquid in the cooling cavity is difficult to seep out.

Preferably, the third sealing ring 12 seals the gap between the static ring seat 7 and the shaft sleeve 8.

Preferably, a baffle 14 is fixedly arranged on the outer wall of the driving shaft 4 near the right side edge, so that external liquid can be effectively prevented from directly splashing to the gap between the sealing box cover 13 and the shaft sleeve 8.

Preferably, the left side of quiet ring seat 7 is provided with the rotation groove with sand pump impeller 5 looks adaptation, and the inner wall fixed mounting in rotation groove has No. two sealing rubber 6, can shelter from quiet ring seat 7 and sand pump impeller 5's clearance department, prevents that most silt sewage from directly soaking in.

Preferably, the clearance between the stationary ring 2 and the sealing box cover 13 is set as a cooling cavity, and cooling water pipes 9 are arranged at two sides of the cooling cavity, and cooling liquid can be introduced into the cooling cavity from the upper cooling water pipe 9 and then discharged from the bottom cooling water pipe 9.

The specific working principle and the using method of the utility model are as follows: when the driving shaft 4 drives the sand pump impeller 5 to carry out slurry pumping, the driving shaft 4 can rotate in the shaft sleeve 8, the sand pump impeller 5 can drive the movable ring 1 to rotate on the left side of the stationary ring 2, external cooling liquid can be transmitted to the cooling cavity by the cooling water pipe 9 on one side to carry out water sealing and heat dissipation when slurry pumping is carried out, the cooling liquid can be discharged from the cooling water pipe 9 on the other side, the gap between the sand pump impeller 5 and the stationary ring seat 7 is provided with a second sealing rubber ring 6 so as to block most of silt and sewage, the air inlet pipe 15 can be connected with an air pump to transmit external air into the gap between the sand pump impeller 5 and the stationary ring seat 7 and stir the second sealing rubber ring 6 so as to discharge air, and silt and sewage at the gap between the second sealing rubber ring 6 and the sand pump impeller 5 can be blown out by air, so that the mechanical sealing structure of the air seal is additionally arranged, the outside can be effectively prevented from penetrating into the sand pump, and the abrasion of the rotating position of the sand pump is reduced.

The above description is only of the preferred embodiments of the present utility model, and is not intended to limit the present utility model in any way; those skilled in the art will readily appreciate that the present utility model may be implemented as shown in the drawings and described above; however, those skilled in the art will appreciate that many modifications, adaptations, and variations of the present utility model are possible in light of the above teachings without departing from the scope of the utility model; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present utility model still fall within the scope of the present utility model.

Claims

1. The utility model provides a sand pump mechanical seal structure, includes drive shaft (4), quiet ring seat (7), its characterized in that: the inner wall of quiet ring seat (7) is provided with quiet ring (2), the clearance department of quiet ring (2) and quiet ring seat (7) is provided with sealing rubber ring (3) No. one, the outer wall fixedly connected with moving ring (1) of drive shaft (4), the left end fixedly connected with sand pump impeller (5) of drive shaft (4), the inner wall of quiet ring (2) is provided with axle sleeve (8), the inside of axle sleeve (8) is arranged in to drive shaft (4), the both sides of quiet ring seat (7) all are fixed intercommunication and are had condenser tube (9), the right side threaded connection of quiet ring seat (7) has sealing cap (13), the inner wall left side of sealing cap (13) is provided with spring holder (11), the inner wall left side of spring holder (11) is provided with No. three sealing washer (12), the left side of No. three sealing washer (12) is provided with extrusion spring (10), the top of quiet ring seat (7) is fixed intercommunication has into trachea (15).

2. A sand pump mechanical seal according to claim 1, characterized in that the moving ring (1) is in rotational connection with the stationary ring (2).

3. A sand pump mechanical seal according to claim 1, characterized in that the sealing rubber ring (3) is arranged in a K-type structure.

4. The mechanical seal structure of the sand pump according to claim 1, wherein the third sealing ring (12) is arranged at a gap between the spring seat (11) and the seal box cover (13), and the pressing spring (10) can press the spring seat (11) to clamp and fix the third sealing ring (12).

5. The mechanical seal structure of the sand pump according to claim 1, wherein the third sealing ring (12) seals a gap between the static ring seat (7) and the shaft sleeve (8).

6. A sand pump mechanical seal according to claim 1, characterized in that the outer wall of the drive shaft (4) is fixedly provided with a baffle (14) close to the right side edge.

7. The mechanical seal structure of the sand pump according to claim 1, wherein a rotating groove matched with the sand pump impeller (5) is formed in the left side of the stationary ring seat (7), and a second sealing rubber ring (6) is fixedly arranged on the inner wall of the rotating groove.

8. A sand pump mechanical seal structure according to claim 1, characterized in that the clearance between the stationary ring (2) and the seal box cover (13) is provided with a cooling cavity, and cooling water pipes (9) are arranged on two sides of the cooling cavity.