CN219570850U

CN219570850U - Quick assembly component for double-end-face mechanical seal

Info

Publication number: CN219570850U
Application number: CN202223466252.2U
Authority: CN
Inventors: 甘根喜; 陈磊
Original assignee: Wuhan Sanyuan Pump Manufacturing Co ltd
Current assignee: Wuhan Sanyuan Pump Manufacturing Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-08-22
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses a quick assembly component for double-end mechanical seal, which comprises a double mechanical seal and an assembly sleeve in clearance fit with a shaft sleeve on a rotating shaft, wherein the double mechanical seal comprises a first movable ring, a second movable ring, a spring seat, a first static ring, a second static ring, a set screw and a gland, in the installation process, the first movable ring, the spring seat and the second movable ring are sleeved on the shaft sleeve and are abutted with the first static ring arranged on the fixed seat, a circle of assembly scale mark is processed at the position close to the shaft end of the shaft sleeve, a line-of-sight hole is formed in the side wall of the assembly sleeve, the second movable ring can be made to approach the first movable ring by pushing the assembly sleeve inwards along the axial direction, when the assembly scale mark is seen to pass through the center area of the line-of-sight hole, the set screw is screwed down to fix the spring seat on the shaft sleeve, and then the second static ring and the gland are arranged at the shaft end of the shaft sleeve. The double mechanical sealing element has the advantages that the double mechanical sealing element can be guaranteed to be installed on the shaft end of the rotating shaft sleeve rapidly and accurately, and the sealing effect is good after the double mechanical sealing element is installed.

Description

Quick assembly component for double-end-face mechanical seal

Technical Field

The utility model belongs to the field of mechanical sealing for long-axis pumps, and particularly relates to a quick assembly component for double-end-face mechanical sealing.

Background

The mechanical seal generally comprises a static ring seat, a dynamic ring sealing ring, a static ring sealing ring, an anti-rotation pin, a static ring, a dynamic ring, a spring seat, a set screw and the like, wherein the dynamic ring and the spring seat are generally fixed on a rotating shaft or a shaft sleeve of the rotating shaft by the set screw so as to synchronously rotate along with the rotating shaft, the static ring is fixed with the static ring seat by the anti-rotation pin and the like, the static ring is fixed relative to the rotating shaft, the dynamic ring is axially movable relative to the rotating shaft and circumferentially positioned, the dynamic ring is pressed on the static ring by a compression force with a certain size provided by the spring, and the dynamic ring can rotate relative to the static ring to form end face seal between the dynamic ring and the static ring. According to the pair number of friction surfaces, the mechanical seal is generally divided into a single end surface, a double end surface and a multi-end surface, wherein the single end surface is provided with a pair of friction pairs and only one spring in the axial direction in the seal mechanism, the installation is convenient at this moment, the locking position of the set screw can be determined by measuring the distance between the friction pairs and the shaft ends, the double end surface is provided with two pairs of friction pairs and two springs in the axial direction, at this moment, the position of the set screw is determined by measuring the distance between the friction pairs and the shaft ends, the compression force of the spring in the two pairs is easily caused to be too large or too small, and the installation failure or the effect of the mechanical seal is not ideal.

Disclosure of Invention

The utility model aims to provide a quick assembly component for a double-end-face mechanical seal, which aims to overcome the defects that the prior double-end-face mechanical seal is easy to cause installation failure and the mechanical seal effect is not ideal because the locking position of a screw on a spring seat is not well determined when the prior double-end-face mechanical seal is installed.

The technical scheme for solving the technical problems is as follows: the utility model provides a quick assembly of bi-polar face mechanical seal, its includes double mechanical seal spare and with the epaxial axle sleeve clearance fit's assembly sleeve, double mechanical seal spare includes first rotating ring, second rotating ring, spring holder, first quiet ring, second quiet ring, holding screw and gland, first rotating ring and second rotating ring are located the spring holder both sides and all through the spring with the spring holder is connected, and in the installation, first rotating ring, spring holder and second rotating ring all overlap on the axle sleeve and first rotating ring butt of installing on the fixing base, the axle sleeve is being close to axle head department processing has the round assembly scale mark, set up the line of sight hole on the assembly sleeve lateral wall, inwards promote along the axial the assembly can make the second rotating ring to first rotating ring is close to, when seeing through the line of sight hole the assembly scale mark is followed line of sight hole central region is passed through, screw down the holding screw can be fixed in on the axle sleeve, will the assembly sleeve is followed pull down in axle head and install with the second quiet ring of axle sleeve.

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

Further, the shaft end of the rotating shaft is provided with an annular stepped table surface, the cylindrical wall surface of the stepped table surface is provided with external threads, the rotating shaft is in threaded connection with a lock nut through the external threads, and when the lock nut rotates in the screwing direction, the assembly sleeve can be pressed to push the second movable ring.

Further, an inner flanging for the locking nut to abut against is arranged at one end, far away from the second movable ring, of the assembly sleeve.

Further, the second stationary ring is fixed on the inner side of the gland and compresses the second movable ring, and the gland is fixedly connected with the fixed seat.

Further, the line of sight hole is located the assembly cover be close to the one end of second rotating ring.

Further, the number of the line-of-sight holes is multiple and the line-of-sight holes are uniformly arranged at intervals along the circumferential direction of the assembly sleeve, and the centers of all the line-of-sight holes are positioned on the same cross section of the assembly sleeve.

Further, the material of the assembly is hard plastic or metal.

Compared with the prior art, the utility model has the technical effects and advantages that:

through establishing the assembly scale mark in advance in the suitable position department of pivot axle sleeve, promote two mechanical seal spare's moving ring to another moving ring by the assembly cover during the installation and remove so that two ascending springs obtain compressing, when seeing from the line of sight hole that sets up on the assembly cover that the assembly scale mark is located line of sight hole middle part region, represent two axial springs promptly and have suitable elastic deformation, the spring holder is located the position that can lock promptly accurately this moment, can make spring holder and axle sleeve fixed through holding screw, then pull down the assembly cover again at axle head installation gland and another quiet ring, accomplish the installation promptly, the installation is fast, spring holder position is accurate, the sealing performance of two mechanical seal spare after the installation is better.

Drawings

FIG. 1 is a schematic view of a double-end mechanical seal quick assembly provided by the utility model after an assembly sleeve of the assembly pushes a second movable ring to move right into position and tightens a set screw;

FIG. 2 is a cross-sectional view of the assembly of FIG. 1;

FIG. 3 is an enlarged schematic view of the encircled portion of the assembly of FIG. 1;

FIG. 4 is a schematic illustration of the portion of the double mechanical seal of FIG. 1 with the lock nut removed and moved out of engagement with the set screw after removal of the mounting assembly;

fig. 5 is a schematic view of the complete double mechanical seal assembled on the sleeve.

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

1. a shaft sleeve; 2. assembling a set; 3. a first moving ring; 4. a second moving ring; 5. a spring seat; 6. a first stationary ring; 7. a second stationary ring; 8. a set screw; 9. a gland; 10. a fixing seat; 11. assembling scale marks; 12. a line-viewing hole; 13. a lock nut; 14. and (5) inner flanging.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, if terms indicating orientations such as "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc. are used, the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the indicated devices or elements must have a specific orientation, be configured and operated in the specific orientation, and thus are not to be construed as limiting the present utility model.

As shown in fig. 1 to 5, the utility model provides a quick assembly of a double mechanical seal, which comprises a double mechanical seal and an assembly sleeve 2 in clearance fit with a shaft sleeve 1 on a rotating shaft, wherein the double mechanical seal comprises a first movable ring 3, a second movable ring 4, a spring seat 5, a first static ring 6, a second static ring 7, a set screw 8 and a gland 9, the first movable ring 3 and the second movable ring 4 are positioned on two sides of the spring seat 5 and are connected with the spring seat 5 through springs, in the installation process, the first movable ring 3, the spring seat 5 and the second movable ring 4 are sleeved on the shaft sleeve 1, the first movable ring 3 is abutted with the first static ring 6 mounted on a fixed seat 10, a circle of assembly scale line 11 is processed on the shaft sleeve 1 near the shaft end, a line-of view hole 12 is formed in the side wall of the assembly sleeve 2, the second movable ring 4 can be made to approach the first movable ring 3, when the assembly scale line 11 is seen from the center region through the line-of view hole 12, the set screw 8 can be fixed on the shaft sleeve 7 and then screwed down on the shaft sleeve 1 through the set screw 9.

It should be noted that, the position of the assembly scale line is usually determined after the assembly test of the standard component with the same specification, the positions of the assembly scale lines applicable to the rotating shaft sleeve on which the double mechanical seal components are required to be installed are the same for the double mechanical seal components with the same batch, so after the position of the assembly scale line is determined through the test, the assembly scale line with the same off-axis end position can be machined in advance on the sleeve with the same batch, and the assembly scale line is not required to be drawn first during each assembly, therefore, the assembly efficiency can be obviously improved and the assembly effect is better through the assembly of the line-viewing hole and the assembly scale line of the assembly. The assembly scale mark can be a shallow groove turned during the shaft sleeve processing production.

In one embodiment of the present utility model, as shown in fig. 1, the shaft is provided with an annular stepped platform at the shaft end, an external thread is provided on the cylindrical wall surface of the stepped platform, the shaft is in threaded connection with a lock nut 13 through the external thread, and when the lock nut 13 rotates in the tightening direction, the assembly sleeve 2 can be pressed to push the second moving ring 4. In other words, in this embodiment, the pushing assembly is axially moved by the axial pushing force generated when the lock nut is screwed, the axial moving speed of the assembly is slow, the controllability is good, the central area of the line-of-sight hole can be guaranteed to be aligned with the assembly scale marks, so that the compression degree of two springs axially spaced on the spring seat is guaranteed to be equivalent, the first and second movable rings pushed by the two springs can be guaranteed to be pressed on the first and second stationary rings with proper pressure, better end face sealing is achieved, and as known by the skilled person, the pressure of the springs provided for the movable rings cannot be too large or too small, the friction force between friction surfaces of the movable rings is too large, mechanical sealing damage is easy to be caused, and the contact surfaces of the movable rings have gaps when too small, and the sealing effect is poor.

In one embodiment of the utility model, as shown in fig. 2, the end of the fitting sleeve 2 remote from the second ring 4 is provided with an inner flange 14 against which the lock nut 13 abuts. After the inner flanging is arranged at the outer end of the assembly sleeve, the assembly sleeve can be better pushed by the end face of the lock nut. It can be understood that the inner flanging can be continuous annular, or a plurality of arc-shaped points or blocks which are arranged at intervals, and the effect of facilitating the pushing of the lock nut can be realized. The inward flanging and the assembly sleeve can be integrally formed, and the line-viewing hole on the assembly sleeve can be formed by a die in addition to drilling.

In one embodiment of the present utility model, the second stationary ring 7 is fixed inside the gland 9 and compresses the second moving ring 4, and the gland 9 is fixedly connected with the fixing base 10. The holder is typically a protective tube for the shaft, such as an inner tube of a long shaft pump, in which the long shaft of the long shaft pump rotates.

In one embodiment of the utility model, the line of sight hole 12 is located at an end of the mounting sleeve 2 adjacent to the second moving ring 4. The line-of-sight hole is preferably a circular hole, but is not excluded as a long hole, an elliptical hole, a waist hole, etc.

In one embodiment of the present utility model, the number of the line-of-sight holes 12 is plural and is uniformly spaced along the circumferential direction of the fitting sleeve 2, and the centers of all the line-of-sight holes 12 are located on the same cross section of the fitting sleeve 2. The plurality of line-of-sight holes that the interval set up, be convenient for install and matched set, directly overlap in axle sleeve axle head can, always have a line-of-sight hole to be located the position of easier observation. When only one or a small number of line-of-sight holes are provided, the line-of-sight holes are required to be positioned at positions which are easy to observe in the upward direction during assembly.

In one embodiment of the present utility model, the material of the mounting sleeve 2 is hard plastic or metal. The assembly sleeve is made of stainless steel, is not easy to deform and has good durability, and the same-specification rotating shaft sleeve and the double mechanical sealing parts can be repeatedly used for auxiliary installation.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model 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 described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. The utility model provides a quick assembly subassembly of bi-polar face mechanical seal, its characterized in that, including two mechanical seal spare and with pivot upper shaft sleeve (1) clearance fit's assembly sleeve (2), two mechanical seal spare include first moving ring (3), second moving ring (4), spring holder (5), first moving ring (6), second moving ring (7), holding screw (8) and gland (9), first moving ring (3) and second moving ring (4) are located spring holder (5) both sides and all through the spring with spring holder (5) are connected, in the installation, first moving ring (3), spring holder (5) and second moving ring (4) all overlap on shaft sleeve (1) just first moving ring (3) and the first moving ring (6) butt of installing on fixing base (10), shaft sleeve (1) are being close to axle head department processing have one round assembly scale mark (11), set up on the assembly sleeve (2) lateral wall and looked line hole (12).

2. The quick assembly of a double mechanical seal according to claim 1, wherein the shaft is provided with an annular stepped surface at the shaft end, an external thread is provided on the cylindrical wall surface of the stepped surface, the shaft is in threaded connection with a lock nut (13) through the external thread, and the lock nut (13) can press and push the second moving ring (4) by the assembly sleeve (2) when rotating in the tightening direction.

3. A quick assembly of a double mechanical seal according to claim 2, characterized in that the end of the assembly sleeve (2) remote from the second moving ring (4) is provided with an inner flange (14) against which the locking nut (13) abuts.

4. The quick assembly of a double mechanical seal according to claim 1, wherein the second stationary ring (7) is fixed inside the gland (9) and compresses the second movable ring (4), and the gland (9) is fixedly connected with the fixed seat (10).

5. A quick assembly of a double mechanical seal according to claim 1, characterized in that the line of sight hole (12) is located at the end of the assembly sleeve (2) close to the second moving ring (4).

6. A quick assembly of a double mechanical seal according to claim 1, characterized in that the number of said line-of-sight holes (12) is a plurality and evenly spaced along the circumference of said assembly sleeve (2), the centers of all said line-of-sight holes (12) being located on the same cross section of said assembly sleeve (2).

7. A two-sided mechanical seal quick assembly according to any one of claims 1 to 5, wherein the material of the assembly sleeve (2) is a rigid plastic or metal.