CN212959235U

CN212959235U - Integrated sealing device for split pump

Info

Publication number: CN212959235U
Application number: CN202020886624.9U
Authority: CN
Inventors: 蔡昌莎; 邹豪; 都森欣; 曹云鹏; 关键; 胡益军; 卓梓聿; 陆晶妮; 裘明权
Original assignee: Lopland Machinery & Equipment Ningbo Co ltd
Current assignee: Lopland Machinery & Equipment Ningbo Co ltd; Roplan Machinery Ningbo Co Ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2021-04-13
Anticipated expiration: 2030-05-22

Abstract

The utility model discloses a collection dress formula sealing device for split pump, establish the axle sleeve outside the pivot including the cover, the outside cover of axle sleeve is equipped with rotating ring subassembly, quiet ring and gland in proper order, the one end that the gland is close to the rotating ring subassembly is equipped with first mounting groove, the sealed cooperation of quiet ring is in first mounting groove, and the mill face of quiet ring forms sealed mill face with the sealed face laminating of rotating ring subassembly; an elastic compensation part is arranged between the tail end of the static ring and the bottom of the first mounting groove; the one end that the movable ring subassembly was kept away from to the axle sleeve is equipped with the drive ring to realize the integral collection dress of axle sleeve, movable ring subassembly, quiet ring and gland. The utility model discloses a well collection dress formula sealing device for pump adopts integral pre-installation structure, makes things convenient for the dismouting, and sealing performance is stable, reliable.

Description

Integrated sealing device for split pump

Technical Field

The utility model relates to a mechanical seal technical field specifically is a cartridge type sealing device for middle-open pump.

Background

Split pump also known as single stage double suction typeCentrifugal pumpThe main characteristic is that the flow rate of the conveying medium is large. The double suction pump is an important form of centrifugal pump, and because of its high lift and large flow rate, it is widely used for water supply and drainage in industry and city, and also for irrigation and drainage in farmland and orchard, and for delivering clear water or other liquid with similar physical and chemical properties. The shaft seal installed is often in the form of both a soft packing seal and a mechanical seal, with the mechanical seal being the most common.

The current form of sealing suffers from the following drawbacks:

1. the packing sealing structure is simple, low in price and convenient to maintain, but has large leakage amount and large consumed shaft power.

2. Traditional mechanical seal structure form divide into cartridge type mechanical seal and non-cartridge type mechanical seal, and non-cartridge type mechanical seal structure is simple, the low price, but the installation is more loaded down with trivial details, collides with the quiet ring of moving easily at the in-process of installation to arouse sealed inefficacy. Traditional cartridge type seal often focuses on the field below 100mm, and for a 100mm-200mm shaft diameter split pump and under the working condition that the static pressure of a pipeline reaches 4.5Mpa pressure, the traditional seal structure cannot well cope due to high rotating speed, high pressure and large heat productivity of the seal end face.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: in order to overcome the defects of the prior art, the integrated sealing device for the axially split pump is provided, an integrated pre-installation structure is adopted, the assembly and disassembly are convenient, and the sealing performance is stable and reliable.

The utility model adopts the technical proposal that: the integrated sealing device for the split pump comprises a shaft sleeve sleeved outside a rotating shaft, wherein a movable ring assembly, a static ring and a gland are sequentially sleeved outside the shaft sleeve, a first mounting groove is formed in one end, close to the movable ring assembly, of the gland, the static ring is matched in the first mounting groove in a sealing mode, and a grinding surface of the static ring is attached to a sealing surface of the movable ring assembly to form a sealing grinding surface; an elastic compensation part is arranged between the tail end of the static ring and the bottom of the first mounting groove; and one end of the shaft sleeve, which is far away from the moving ring assembly, is provided with a driving ring so as to realize integral packaging of the shaft sleeve, the moving ring assembly, the static ring and the gland.

Compared with the prior art, the utility model has the following advantage:

the sealing device of the utility model is of a container type structure, which realizes the integral assembly and disassembly in the use process, and is convenient and reliable; in addition, the static ring compensation structure is adopted in the sealing structure, the compensation part is arranged between the static ring and the gland, and the static ring and the gland are static, so that the static and static of the compensation element are realized, the stability of the compensation elastic force can be ensured, and the stability of the sealing performance is ensured.

Furthermore, the movable ring assembly comprises a movable ring and a movable ring seat, wherein one end of the shaft sleeve is provided with a limiting step, the movable ring seat is installed and matched on the limiting step, one end of the movable ring seat, which is far away from the limiting step, is provided with a second mounting groove for assembling the movable ring, a plurality of limiting bulges are integrally formed at the bottom of the second mounting groove, and one end of the movable ring, which is close to the movable ring seat, is provided with a plurality of limiting slots matched with the limiting bulges; one end of the movable ring is arranged in the second mounting groove in a sealing mode.

As an improvement, a limit groove is formed in the position, close to the limit step, of the shaft sleeve, a plurality of set screws are arranged on the outer side wall of the movable ring seat along the circumferential direction, and the heads of the set screws are tightly matched in the limit groove. The movable ring seat is connected with the shaft sleeve through the set screw, and the movable ring seat is simple in structure, stable and reliable, and convenient to disassemble, assemble and maintain.

In another improvement, the elastic compensation member includes a plurality of small springs, a plurality of spring holes are uniformly arranged at the bottom of the first mounting groove along the circumferential direction, one end of each of the small springs is accommodated in the spring hole, and the other end of each of the small springs abuts against the tail end of the stationary ring. A plurality of uniformly arranged small springs are selected in the structure to serve as elastic compensation pieces, so that average and stable compensation force is provided for the sealing grinding surface, and the sealing performance of the sealing surface is more stable.

And the bottom of the first mounting groove is also provided with at least one anti-rotation pin, and the tail end of the static ring is provided with a pin hole matched with the anti-rotation pin. The anti-rotation pin structure is used for limiting the static ring to not rotate under the driving of the friction force of the movable ring, so that the sealing stability is ensured.

In another improvement, a plurality of driving screws and connecting screws extending in the radial direction are arranged on the driving ring along the circumferential direction, and the plurality of driving screws and the connecting screws are staggered; the shaft sleeve is provided with a plurality of through holes for the head of the driving screw to pass through and a connecting hole matched with the head of the connecting screw. In the structure, the driving ring and the shaft sleeve are matched and fixed with corresponding connecting holes through connecting screws, and in addition, the driving screws on the driving ring penetrate through the through holes and are tightly fixed on the outer side wall of the rotating shaft to play a transmission role.

And in addition, a clamping ring is clamped at one end, close to the driving ring, outside the shaft sleeve, and the end surface of the clamping ring is positioned on the end surface of the driving ring. Preventing axial displacement of the drive ring.

Drawings

Fig. 1 is the utility model discloses a collection dress formula sealing device constructional device for middle-open pump.

Fig. 2 is a sectional view of the cartridge seal device for the middle-opening pump of the present invention.

Fig. 3 is a structure diagram of the movable ring of the present invention.

Fig. 4 is a structural diagram of the movable ring seat of the present invention.

Fig. 5 is an enlarged view at X in fig. 2.

The bearing comprises a shaft sleeve 1, a limiting step 1.1, a limiting groove 1.2, a through hole 1.3, a static ring 2, a pin hole 2.1, a limiting groove 2.2, a gland 3, a first mounting groove 3.1, a spring hole 3.2, a set screw 4, a drive ring 5, a movable ring 6, a limiting slot 6.1, a movable ring seat 7, a second mounting groove 7.1, a limiting bulge 7.2, a small spring 8, an anti-rotation pin 9, a drive screw 10, a snap ring 11, a connecting screw 12 and a positioning block 13.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

In the description of the present invention, it should be noted that the terms "tail end", "bottom", "outer side wall", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, which is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific position, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, the terms "first" and "second" are used for convenience of description and distinction, and have no specific meaning.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "fitted" are to be understood broadly, and may be, for example, 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and 2, the utility model provides a collection dress formula sealing device for middle-open pump, establish the axle sleeve 1 outside the pivot including the cover, the outside of axle sleeve 1 is equipped with rotating ring subassembly, quiet ring 2 and gland 3 along the axial cover in proper order, be equipped with first mounting groove 3.1 at the one end that gland 3 is close to the rotating ring subassembly, the sealed cooperation of quiet ring 2 is in first mounting groove 3.1, specifically, be equipped with the sealing washer between the lateral surface of quiet ring 2 and the inside wall of first mounting groove 3.1, realize sealed cooperation; and the grinding surface of the static ring 2 is attached to the sealing surface of the dynamic ring component to form a sealing grinding surface; an elastic compensation piece is arranged between the tail end of the static ring 2 and the bottom of the first installation groove 3.1. In addition, in the structure, because the elastic force of the elastic compensation piece can push out the static ring 2 when the static ring is installed, a limiting groove 2.2 is arranged on the outer end face of the static ring 2, as shown in fig. 5, when the static ring 2 moves towards the position far away from the first installation groove 3.1, the inner ring of the sealing ring is matched in the limiting groove 2.2, and a positioning groove 3.3 used for limiting the outer ring of the sealing ring is also arranged on the side wall of the first installation groove 3.1, so that the static ring 2 can be effectively prevented from falling out of the first installation groove 3.1 under the thrust action of the elastic compensation piece when the sealing device is pre-installed, and the installation convenience is improved.

In addition, a driving ring 5 is arranged at one end of the shaft sleeve 1 far away from the movable ring assembly, so that the integral packaging of the shaft sleeve 1, the movable ring assembly, the static ring 2 and the gland 3 is realized. Specifically, in order to axially position the drive ring 5, a snap ring 11 is clamped at one end of the drive ring 5 outside the shaft sleeve 1, and the end surface of the snap ring 11 is positioned on the end surface of the drive ring 5.

Specifically, the driving ring 5 is provided with a plurality of radially extending driving screws 10 and connecting screws 12 along the circumferential direction, and the plurality of driving screws 10 and the connecting screws 12 are sequentially staggered from each other; the shaft sleeve 1 is provided with a plurality of through holes 1.3 for the heads of the driving screws 10 to pass through and a connecting hole 1.4 matched with the head of the connecting screw 12, and the aperture of the connecting hole 1.4 is smaller than the outer diameter of the connecting screw 12. When the whole set of mechanical seal device is arranged outside the rotating shaft in a penetrating mode along the inner hole of the shaft sleeve 1, the head of the connecting screw 12 is tightly connected into the connecting hole 1.4 in the shaft sleeve 1 by screwing the connecting screw 12, and in addition, the head of the driving screw 10 penetrates through the outer side wall of the rotating shaft by tightly connecting to realize the driving connection between the shaft sleeve 1 and the rotating shaft.

In this embodiment, the rotating ring subassembly includes rotating ring 6 and rotating ring seat 7, and the one end of axle sleeve 1 is equipped with spacing step 1.1, and the installation cooperation of rotating ring seat 7 is on spacing step 1.1 to, be equipped with the sealing washer between the interior pore wall of rotating ring seat 7 and the lateral wall of axle sleeve, prevent that the medium from entering into in the sealed chamber from this department. A second mounting groove 7.1 for mounting the movable ring 6 is formed in one end, away from the limiting step 1.1, of the movable ring seat 7, a plurality of limiting protrusions 7.2 are integrally formed at the bottom of the second mounting groove 7.1, and a plurality of limiting slots 6.1 matched with the limiting protrusions 7.2 are formed in one end, close to the movable ring seat 7, of the movable ring 6; one end of the movable ring 6 is arranged in the second mounting groove 7.1 in a sealing manner; it is specific, be equipped with the sealing washer between the outer terminal surface of rotating ring 6 and second mounting groove 7.1 inside wall, in this structure, when rotating ring 6 assembles when second mounting groove 7.1 along the axial, the cooperation of a plurality of spacing archs 7.2 one-to-ones is in spacing slot 6.1, realize the transmission effect to rotating ring 6, also can prevent simultaneously that rotating ring 6 from taking place to rotate, process out spacing arch through the direct integrated into one piece in corresponding position on rotating ring seat 7 in this structure, compare in the transmission form who adopts the after-mounting driving pin on the existing market, higher security and stability have, because under the big axle diameter and the big operating mode of running torque, the driving pin structure of adopting the later stage to join in marriage to adorn has the not hard up risk of driving pin.

In addition, a limiting groove 1.2 is formed in the position, close to the limiting step 1.1, of the shaft sleeve 1, a plurality of set screws 4 are uniformly arranged on the outer side wall of the movable ring seat 7 along the circumferential direction, the heads of the set screws 4 are tightly matched in the limiting groove 1.2, and the movable ring seat 7 is in driving connection with the shaft sleeve 1.

In another aspect, in the present embodiment, preferably, the elastic compensation member includes a plurality of small springs 8, a plurality of spring holes 3.2 are uniformly formed in the bottom of the first installation groove 3.1 along the circumferential direction, one end of each of the plurality of small springs 8 is accommodated in the spring hole 3.2, and the other end of each of the plurality of small springs abuts against the tail end of the stationary ring 2. And, still be equipped with at least one stop pin 9 in the bottom of first mounting groove 3.1, the tail end of quiet ring 2 is equipped with the pinhole 2.1 with stop pin 9 cooperatees. As shown in FIG. 4, 3 anti-rotation pins 9 are uniformly arranged at the bottom of the first mounting groove 3.1 along the circumferential direction, correspondingly, three pin holes 2.1 are formed in the tail end face of the stationary ring 2, and as shown in FIG. 3, the anti-rotation effect of the stationary ring 2 is effectively guaranteed.

As shown in fig. 1, a positioning block 13 is further connected to the outside of the driving ring 5 for defining the working height of the sealing assembly, and in addition, the positioning block 13 needs to be removed after the whole set of mechanical seals is mounted to the corresponding position in the pump cavity.

While the above is directed to the preferred embodiment of the present invention, it is not intended that it be limited, except as by the appended claims. The present invention is not limited to the above embodiments, and the specific structure thereof allows for changes, all the changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims

1. The utility model provides a collection dress formula sealing device for split pump, establishes at the outside axle sleeve (1) of pivot including the cover, its characterized in that: a moving ring assembly, a static ring (2) and a gland (3) are sequentially sleeved outside the shaft sleeve (1), a first mounting groove (3.1) is formed in one end, close to the moving ring assembly, of the gland (3), the static ring (2) is hermetically matched in the first mounting groove (3.1), and a grinding surface of the static ring (2) is attached to a sealing surface of the moving ring assembly to form a sealing grinding surface; an elastic compensation piece is arranged between the tail end of the static ring (2) and the bottom of the first mounting groove (3.1); one end, far away from the moving ring assembly, of the shaft sleeve (1) is provided with a driving ring (5) so as to realize integral packaging of the shaft sleeve (1), the moving ring assembly, the static ring (2) and the gland (3).

2. The cartridge type seal device for a middle opening pump according to claim 1, wherein: the movable ring assembly comprises a movable ring (6) and a movable ring seat (7), a limiting step (1.1) is arranged at one end of the shaft sleeve (1), the movable ring seat (7) is installed and matched on the limiting step (1.1), a second installation groove (7.1) for assembling the movable ring (6) is formed in one end, away from the limiting step (1.1), of the movable ring seat (7), a plurality of limiting bulges (7.2) are integrally formed at the bottom of the second installation groove (7.1), and a plurality of limiting slots (6.1) matched with the limiting bulges (7.2) are formed in one end, close to the movable ring seat (7), of the movable ring (6); one end of the movable ring (6) is arranged in the second mounting groove (7.1) in a sealing mode.

3. The cartridge type seal device for a middle opening pump according to claim 2, wherein: the position of the shaft sleeve (1) close to the limiting step (1.1) is provided with a limiting groove (1.2), the outer side wall of the movable ring seat (7) is provided with a plurality of set screws (4) along the circumferential direction, and the heads of the set screws (4) are tightly matched in the limiting groove (1.2).

4. The cartridge type seal device for a middle opening pump according to claim 1, wherein: the elastic compensation piece comprises a plurality of small springs (8), a plurality of spring holes (3.2) are uniformly formed in the bottom of the first mounting groove (3.1) along the circumferential direction, one ends of the small springs (8) are accommodated in the spring holes (3.2), and the other ends of the small springs abut against the tail end of the static ring (2).

5. The cartridge type sealing device for a middle opening pump according to claim 1 or 4, wherein: the bottom of the first mounting groove (3.1) is also provided with at least one anti-rotation pin (9), and the tail end of the static ring (2) is provided with a pin hole (2.1) matched with the anti-rotation pin (9).

6. The cartridge type seal device for a middle opening pump according to claim 1, wherein: a plurality of driving screws (10) and connecting screws (12) which extend in the radial direction are arranged on the driving ring (5) along the circumferential direction, and the plurality of driving screws (10) and the connecting screws (12) are staggered; the shaft sleeve (1) is provided with a plurality of through holes (1.3) for the head of the driving screw (10) to pass through and connecting holes (1.4) matched with the head of the connecting screw (12).

7. The cartridge type seal device for a middle opening pump according to claim 1, wherein: a snap ring (11) is clamped at one end of the outside of the shaft sleeve (1) close to the driving ring (5), and the end surface of the snap ring (11) is positioned on the end surface of the driving ring (5).