CN112032098B

CN112032098B - Axial sealing structure of pump shaft of self-priming pump

Info

Publication number: CN112032098B
Application number: CN202010789933.9A
Authority: CN
Inventors: 曲昌平
Original assignee: Eske Pump Co
Current assignee: Eske Pump Co
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2021-11-19
Anticipated expiration: 2040-08-07
Also published as: CN112032098A

Abstract

The invention belongs to the technical field of self-priming pumps, and particularly discloses an axial sealing structure of a pump shaft of a self-priming pump, which comprises a pump shell, a pump shaft, a front sealing assembly and a rear sealing shaft piece; the pump shaft is horizontally arranged in the pump shell, and the surface of the pump shaft is respectively provided with a front sealing assembly and a rear sealing assembly; the front sealing assembly comprises a movable ring, a fixed rod and a rotating ring; the fixed rod penetrates through the center of the movable ring, and two ends of the fixed rod are fixedly connected with the inside of the movable ring; the pump shaft is provided with a through hole at the position located on the inner side of the impeller, the size of the through hole is matched with that of the fixed rod, and the movable ring is fixedly connected with the pump shaft through the matching of the fixed rod and the through hole; a rotating ring is arranged outside the rotating ring; a plurality of first extrusion springs are arranged between the rotating ring and the rotating ring; the rear sealing assembly is arranged at the position, located on the pump cover, of the pump shaft and comprises a static ring, a first sealing element and a second sealing element; and a groove is formed in the corresponding position on the surface of the pump shaft.

Description

Axial sealing structure of pump shaft of self-priming pump

Technical Field

The invention relates to the technical field of self-priming pumps, in particular to an axial sealing structure of a pump shaft of a self-priming pump.

Background

The self-sucking pump is a pump which sucks water up under the action of the self-sucking pump in the starting stage and is put into normal operation. Through the special structure of the self-priming pump, the water can be poured when the self-priming pump is started for the first time, and the water does not need to be poured in advance when the self-priming pump is started later. Broadly speaking, self-priming pumps are of various types, and can be divided into self-priming centrifugal pumps, self-priming mixed flow pumps, self-priming vortex pumps and the like according to the action principle. In a narrow sense, when referring to a self-priming pump, it is generally referred to as a self-priming centrifugal pump. Self-priming centrifugal pumps are classified into gas-liquid mixing (including internal mixing and external mixing), water ring wheel, jet (including liquid jet and gas jet), and other types (with various volumetric pumps, such as hand pump, diaphragm pump, plunger pump, etc.) according to their principles of action.

The sealing assembly of self priming pump seals through rubber bellows mostly, but uses the back for a long time at the self priming pump, and rubber bellows often can lead to sealed effect to descend because of the wearing and tearing between the pump shaft, takes place the condition of revealing even, leads to the condition that sealed effect descends because of wearing and tearing in order to solve sealing assembly, and we provide a self priming pump shaft axial seal structure.

Disclosure of Invention

The invention aims to provide an axial sealing structure of a pump shaft of a self-priming pump, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a self-priming pump shaft axial sealing structure comprises a pump shell, a pump shaft, a front sealing assembly and a rear sealing assembly; the pump shaft is horizontally arranged in the pump shell, and the surface of the pump shaft is respectively provided with a front sealing assembly and a rear sealing assembly; the front sealing assembly comprises a movable ring, a fixed rod and a rotating ring; the fixed rod penetrates through the center of the movable ring, and two ends of the fixed rod are fixedly connected with the inside of the movable ring; the pump shaft is provided with a through hole at the position located on the inner side of the impeller, the size of the through hole is matched with that of the fixed rod, and the movable ring is fixedly connected with the pump shaft through the matching of the fixed rod and the through hole; a rotating ring is arranged outside the rotating ring; a plurality of first extrusion springs are arranged between the rotating ring and the rotating ring; the rear sealing assembly is arranged at the position, located on the pump cover, of the pump shaft and comprises a static ring, a first sealing element and a second sealing element; a groove is formed in the corresponding position on the surface of the pump shaft; the static ring is arranged at the position of the groove, first sealing pieces extend outwards from two sides of the static ring, second sealing pieces are fixedly arranged on two sides of the inner wall of the groove, and the first sealing pieces and the second sealing pieces can be matched with each other and are in sliding connection; the outer side of the fixed ring is fixedly connected with a fixed ring, the surface of the fixed ring is provided with a fastening screw hole, and the fixed ring penetrates through the fastening screw hole through a fastening bolt and is fixedly connected with the pump cover.

Preferably, third sealing elements are fixedly arranged on two sides of the inner wall of the movable ring; a sealing groove is correspondingly arranged on the surface of the pump shaft; the third sealing member cooperates with the seal groove, realizes the sealed between rotating ring and the pump shaft to after the third sealing member takes place wearing and tearing, obtain the extrusion force through first extrusion spring and can make and continue with seal groove in close contact with, guarantee sealed effect.

Preferably, the surface of the pump shell corresponding to the rotating ring is provided with a notch; the rotating ring is located inside the notch.

Preferably, the two sides of the rotating ring extend outwards to form sliding blocks, sliding grooves are formed in positions corresponding to the inner walls of the notches, and the rotating ring is connected with the sliding grooves in a sliding mode through the sliding blocks in a matched mode.

Preferably, sealing gaskets are arranged on two sides of the movable ring and fixedly connected with the movable ring; the sealing effect between the movable ring and the pump shaft can be enhanced by the sealing washer.

Preferably, a plurality of first fixing screw holes are formed in the circumferential side surface of the movable ring at equal intervals, second fixing screw holes are formed in the positions, corresponding to the two sealing gaskets, of the two sealing gaskets, and the first fixing screw holes are fixedly connected with the second fixing screw holes through fixing bolts.

Preferably, the first sealing parts are arranged on two sides of the static ring, the static ring is hollow and is internally provided with a plurality of second extrusion springs, and two ends of each second extrusion spring are fixedly connected with the two first sealing parts; the second extrusion spring can provide the extrusion force to two first sealing members to can also make first sealing member and second sealing member cooperation after first sealing member takes place wearing and tearing, guarantee sealed effect.

Preferably, the first sealing element, the second sealing element and the third sealing element are made of ethylene propylene diene monomer; the ethylene propylene diene monomer rubber material has good wear resistance, and the service life of the first sealing element, the second sealing element and the third sealing element can be prolonged.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the front sealing assembly and the rear sealing assembly are respectively arranged on the surface of the pump shaft, the front sealing assembly is positioned at the rear side of the impeller, the sealing of the impeller part can be realized, and after the movable ring and the third sealing element are worn, the movable ring and the third sealing element can be respectively tightly matched with the pump shaft and the sealing groove under the action of the first extrusion spring, so that the front sealing function is realized and the front sealing effect is ensured; the rear sealing assembly is positioned at the position of the pump cover and can seal the tail end of the pump shaft, and when the first sealing element is abraded, the first sealing element can be continuously and tightly matched with the second sealing element under the action of the second extrusion spring, so that the rear sealing function is realized and the rear sealing effect is ensured; in conclusion, the self-sucking pump has a good sealing effect when the sealing assembly is abraded after the self-sucking pump is used for a period of time, so that the service life of the self-sucking pump is prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a schematic view of the connection of the front seal assembly of the present invention

FIG. 3 is a side view of the front seal assembly of the present invention;

FIG. 4 is a schematic view of the connection of the rear seal assembly of the present invention to the pump shaft;

FIG. 5 is a front view of the rear seal assembly of the present invention.

In the figure: 1. a pump housing; 2. an impeller; 3. a pump shaft; 4. a pump cover; 5. a front seal assembly; 501. a moving ring; 502. fixing the rod; 503. a through hole; 504. a rotating ring; 505. a first pressing spring; 506. a third seal member; 507. a sealing groove; 508. a sealing gasket; 509. a slider; 510. a chute; 511. a first fixing screw hole; 512. a second fixing screw hole; 513. fixing the bolt; 6. a rear seal assembly; 601. a stationary ring; 602. a first seal member; 603. a second seal member; 604. a second pressing spring; 605. a groove; 606. a fixing ring; 607. fastening screw holes; 608. fastening a bolt; 7. a notch.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1-5, the present invention provides an axial sealing structure for a pump shaft 3 of a self-priming pump, which comprises a pump casing 1, a pump shaft 3, a front sealing assembly 5 and a rear sealing assembly 6; the pump shaft 3 is horizontally arranged in the pump shell 1, and the surface of the pump shaft 3 is respectively provided with a front sealing assembly 5 and a rear sealing assembly 6; the front sealing assembly 5 comprises a movable ring 501, a fixed rod 502 and a rotating ring 504; a fixed rod 502 is arranged at the center inside the movable ring 501, the fixed rod 502 penetrates through the center of the movable ring 501, and two ends of the fixed rod 502 are fixedly connected with the inside of the movable ring 501; a through hole 503 is formed in the pump shaft 3 at the inner side of the impeller 2, the size of the through hole 503 is matched with that of the fixed rod 502, and the movable ring 501 is fixedly connected with the pump shaft 3 through the matching of the fixed rod 502 and the through hole 503; a rotating ring 504 is arranged on the outer side of the rotating ring 501; a plurality of first extrusion springs 505 are arranged between the rotating ring 501 and the rotating ring 504; the rear sealing assembly 6 is arranged at the position, located on the pump cover 4, of the pump shaft 3, and the rear sealing assembly 6 comprises a static ring 601, a first sealing element 602 and a second sealing element 603; a groove 605 is formed in the corresponding position on the surface of the pump shaft 3; the static ring 601 is arranged at the position of the groove 605, first sealing elements 602 are arranged on two sides of the static ring 601 in an outward extending mode, second sealing elements 603 are fixedly arranged on two sides of the inner wall of the groove 605, and the first sealing elements 602 and the second sealing elements 603 can be matched with each other and are in sliding connection; the outer side of the stationary ring 601 is fixedly connected with a fixing ring 606, the surface of the fixing ring 606 is provided with a fastening screw hole 607, and the fixing ring 606 penetrates through the fastening screw hole 607 through a fastening bolt 608 to be fixedly connected with the pump cover 4.

Further, third sealing elements 506 are fixedly arranged on two sides of the inner wall of the movable ring 501; a sealing groove 507 is correspondingly arranged on the surface of the pump shaft 3; the third sealing element 506 is matched with the sealing groove 507 to realize the sealing between the moving ring 501 and the pump shaft 3, and when the third sealing element 506 is worn, the third sealing element can be continuously in close contact with the sealing groove 507 by the extrusion force of the first extrusion spring 505, so that the sealing effect is ensured.

Further, a notch 7 is formed on the surface of the pump shell 1 corresponding to the rotating ring 504; the rotating ring 504 is located inside the slot 7.

Further, the rotation ring 504 both sides outwards extend and are provided with slider 509, and spout 510 has been seted up to notch 7 inner wall corresponding position department, and rotation ring 504 passes through slider 509 and spout 510's cooperation sliding connection, can play limiting displacement to rotation ring 504 through slider 509 and spout 510's effect, prevents that rotation ring 504 from taking place to deform because first extrusion spring 55's extrusion force.

Furthermore, two sides of the moving ring 501 are provided with a sealing gasket 508, and the sealing gasket 508 is fixedly connected with the moving ring 501; the sealing washer 508 can enhance the sealing effect between the moving ring 501 and the pump shaft 3.

Furthermore, a plurality of first fixing screw holes 511 are formed in the circumferential side surface of the movable ring 501 at equal intervals, second fixing screw holes 512 are formed in positions corresponding to the two sealing gaskets 508, and the first fixing screw holes 511 and the second fixing screw holes 512 are fixedly connected through fixing bolts 513; the fixing bolt 513 penetrates through the first fixing screw hole 511 and the second fixing screw hole 512, so that the moving ring 501 is fixedly connected with the two sealing gaskets 508, and the two sealing gaskets 508 are positioned on two sides of the moving ring 501 and can protect the moving ring 501. .

Further, the first sealing elements 602 are arranged on two sides of the stationary ring 601, the stationary ring 601 is hollow and is internally provided with a plurality of second extrusion springs 604, and two ends of each second extrusion spring 604 are fixedly connected with the two first sealing elements 602; the second pressing spring 604 can provide pressing force to the two first sealing members 602, so that the first sealing members 602 can be matched with the second sealing members 603 after the first sealing members 602 are worn, and the sealing effect is ensured.

Further, the first sealing element 602, the second sealing element 603 and the third sealing element 506 are made of an ethylene propylene diene monomer (epdm) material; the ethylene propylene diene monomer rubber material has good wear resistance, and can prolong the service life of the first sealing element 602, the second sealing element 603 and the third sealing element 506.

The invention provides an axial sealing structure of a pump shaft 3 of a self-priming pump, which comprises a pump shell 1, a pump shaft 3, a front sealing assembly 5 and a rear sealing assembly 6, wherein the front sealing assembly 5 is arranged on the rear side of the pump shaft 3 positioned on an impeller 2, the front sealing comprises a movable ring 501, a fixing rod 502 and a rotating ring 504, the fixing rod 502 is arranged in the movable ring 501, the fixing rod 502 can penetrate through a through hole 503 formed in the pump shaft 3 so as to fixedly connect the movable ring 501 with the pump shaft 3, the rotating ring 504 is arranged on the outer side of the movable ring 501, a plurality of first extrusion springs 505 are arranged between the movable ring 501 and the rotating ring 504, the first extrusion springs 505 can keep extrusion force on the movable ring 501, third sealing elements 506 are arranged on two sides of the inner wall of the movable ring 501, a sealing groove 507 is correspondingly arranged on the surface of the pump shaft 3, the third sealing elements 506 and the sealing groove 507 can play a sealing effect, and the extrusion force of the first extrusion springs 505 can ensure that the pump shaft 3 rotates or vibrates, the third sealing element 506 can be in close contact with the sealing groove 507 to realize front sealing, sealing gaskets 508 are arranged on two sides of the moving ring 501, a plurality of first fixing screw holes 511 are formed in the surface of the moving ring 501, second fixing screw holes 512 are correspondingly formed in the sealing gaskets 508, the moving ring 501 is fixedly connected with the two sealing gaskets 508 by penetrating through the first fixing screw holes 511 and the second fixing screw holes 512 through fixing bolts 513, the sealing gaskets 508 not only can enhance the sealing effect, but also can protect the moving ring 501, and abrasion caused by direct contact of the side face of the moving ring 501 and the pump shell 1 is prevented;

the rear sealing assembly 6 is arranged at the position, corresponding to the pump cover 4, of the pump shaft 3, the rear sealing assembly 6 comprises a static ring 601, a first sealing piece 602 and a second sealing piece 603, a groove 605 is formed in the position, corresponding to the pump cover 4, of the surface of the pump shaft 3, the static ring 601 is arranged at the position of the groove 605, the static ring 601 is rotatably connected with the pump shaft 3, the first sealing piece 602 extends outwards from two sides of the static ring 601, the second sealing piece 603 is correspondingly arranged on two sides of the inner wall of the groove 605, and the sealing effect is guaranteed through the matching of the first sealing piece 602 and the second sealing piece 603; the fixed ring 606 is fixedly connected to the outer side of the static ring 601, the surface of the fixed ring 606 is provided with a plurality of fastening screw holes 607, the fixed ring 606 penetrates through the fastening screw holes 607 through fastening bolts 608 to be fixedly connected with the pump cover 4, and the fixed ring 601 does not rotate when the pump shaft 3 rotates through the fixed connection of the fixed ring 606 and the pump cover 4, so that the back sealing is realized.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a self priming pump shaft (3) axial seal structure which characterized in that: comprises a pump shell (1), a pump shaft (3), a front sealing component (5) and a rear sealing component (6); the pump shaft (3) is horizontally arranged in the pump shell (1), and the surface of the pump shaft (3) is respectively provided with a front sealing assembly (5) and a rear sealing assembly (6); the front sealing assembly (5) comprises a movable ring (501), a fixed rod (502) and a rotating ring (504); a fixed rod (502) is arranged at the center of the inner part of the movable ring (501), the fixed rod (502) penetrates through the center of the movable ring (501), and two ends of the fixed rod (502) are fixedly connected with the inner part of the movable ring (501); a through hole (503) is formed in the pump shaft (3) at the inner side of the impeller (2), the size of the through hole (503) is matched with that of the fixed rod (502), and the movable ring (501) is fixedly connected with the pump shaft (3) through the matching of the fixed rod (502) and the through hole (503); a rotating ring (504) is arranged on the outer side of the rotating ring (501); a plurality of first extrusion springs (505) are arranged between the rotating ring (501) and the rotating ring (504); the rear sealing assembly (6) is arranged at the position, located on the pump cover (4), of the pump shaft (3), and the rear sealing assembly (6) comprises a static ring (601), a first sealing element (602) and a second sealing element (603); a groove (605) is formed in the corresponding position on the surface of the pump shaft (3); the static ring (601) is arranged at the position of the groove (605), first sealing elements (602) extend outwards from two sides of the static ring (601), second sealing elements (603) are fixedly arranged on two sides of the inner wall of the groove (605), and the first sealing elements (602) and the second sealing elements (603) can be matched with each other and are in sliding connection; the outer side of the static ring (601) is fixedly connected with a fixing ring (606), the surface of the fixing ring (606) is provided with a fastening screw hole (607), and the fixing ring (606) penetrates through the fastening screw hole (607) through a fastening bolt (608) to be fixedly connected with the pump cover (4); third sealing elements (506) are fixedly arranged on two sides of the inner wall of the movable ring (501); a sealing groove (507) is correspondingly arranged on the surface of the pump shaft (3); a notch (7) is formed on the surface of the pump shell (1) corresponding to the rotating ring (504); the rotating ring (504) is positioned inside the notch (7); the two sides of the rotating ring (504) extend outwards to form sliding blocks (509), sliding grooves (510) are formed in the positions corresponding to the inner walls of the notches (7), and the rotating ring (504) is in sliding connection with the sliding grooves (510) through the sliding blocks (509) in a matched mode; sealing washers (508) are arranged on two sides of the movable ring (501), and the sealing washers (508) are fixedly connected with the movable ring (501); a plurality of first fixing screw holes (511) are formed in the circumferential side surface of the movable ring (501) at equal intervals, second fixing screw holes (512) are formed in the positions, corresponding to the two sealing gaskets (508), of the two sealing gaskets, and the first fixing screw holes (511) are fixedly connected with the second fixing screw holes (512) through fixing bolts (513).

2. The axial seal structure of a self-primer pump shaft (3) of claim 1, characterized in that: the first sealing parts (602) are arranged on two sides of the static ring (601), the static ring (601) is internally provided with a plurality of second extrusion springs (604) in a hollow design, and two ends of each second extrusion spring (604) are fixedly connected with the two first sealing parts (602).

3. The axial seal structure of a self-primer pump shaft (3) of claim 1, characterized in that: the first sealing element (602), the second sealing element (603) and the third sealing element (506) are made of ethylene propylene diene monomer rubber materials.