CN201486931U

CN201486931U - External mechanical sealing device

Info

Publication number: CN201486931U
Application number: CN200920169344XU
Authority: CN
Inventors: 黄志军; 常攀; 何波
Original assignee: Sichuan Great Yu Mechanical Sealing Element Manufacturing Co Ltd
Current assignee: Sichuan Great Yu Mechanical Sealing Element Manufacturing Co Ltd
Priority date: 2009-08-24
Filing date: 2009-08-24
Publication date: 2010-05-26
Anticipated expiration: 2019-08-24

Abstract

The utility model discloses an external mechanical sealing device, which comprises a moving ring component and a static ring component which are sleeved on a main shaft, wherein a moving ring of the moving ring component is contacted with a static ring of the static ring component. The utility model is characterized in that the static ring component comprises a static ring body sleeved on the main shaft, a disc at the rear part of the static ring body is contacted with an external end surface of a pump cover via a spring; a front loop of the static ring body is extended into the pump cover, the excircle of the loop is matched with an inner hole of the pump cover in a sealing mode, and the static ring is fastened in an inner hole at the back part of the static ring body; and the moving ring body of the moving ring component and the inner hole of the moving ring are matched with the main shaft in a sealing mode, and the moving ring body is connected with the main shaft via a radial transmission pin. The utility model has the advantages of simple structure, good sealing effect, inspection and debugging without disassembling a main machine, convenient maintenance and low production and use costs; and with additional adjustment nuts, the amount of spring compression can be regulated easily without disassembling the main machine, so the pressure of mechanical sealing is adjusted.

Description

The external mechanical seal device

Technical field

The utility model relates to seal arrangement, specifically relates to a kind of external mechanical seal device.

Background technique

At present, the seal arrangement of middle-opening pump has two kinds, and a kind of is stuffing seal, and another kind is the internally mounted mechanical seal device.As shown in Figure 1, stuffing seal is made up of filler 13, packing ring 14, Gland 15, and filler 13 is contained between main shaft 11 and the pump cover 12, is provided with packing ring 14 in order to heat radiation, cooling in filler 13; Be connected with Gland 15 in pump cover 12 outer ends by bolt 16, the front end of Gland 15 compresses filler 13.This sealing device structure is simple, cost is low, but sealing effect is poor, if Gland is installed tension, the main axis rotation resistance increases, power consumpiton is big, thereby this seal arrangement early investment is low, but the operating cost height.And the internally mounted mechanical seal device, as shown in Figure 2, it is in the inner chamber that forms between pump cover 12, seal end plate 20 and main shaft 11 moving ring assembly 21 and static components 22 to be housed, moving ring assembly 21 is arranged in the rear portion endoporus of pump cover 12, static components 22 is contained in the seal end plate 20, and the rear end of moving ring assembly 21 is inconsistent by the stationary ring 22a of fastening rotating ring 21a and static components 22; The front portion of moving ring assembly 21 and throw-out collar 23 rear ends are respectively equipped with suitable axial groove and axial tooth, the axial tooth of throw-out collar 23 can axially slide in the axial groove of moving ring assembly 21, and the axial tooth front end of throw-out collar 23 props up the axial groove root of moving ring assembly 21, throw-out collar 23 offsets by spring 24 and the spring seat 25 that is fixed on the main shaft 11, spring 24 make throw-out collar 23 all the time with moving ring assembly 21 to pusher, thereby rotating ring 21a is compressed stationary ring 22a.This inside seal device sealing effect is better, but inconvenience is adjusted in complex structure, cost height, installation, when needs adjustment, renewal part, must dismantle the component such as impeller, the pump housing, axle sleeve and pump cover that are contained on the main shaft, could check, adjust, keep in repair, during the cost of overhaul, effort.

The model utility content

Technical problem to be solved in the utility model is to provide a kind of external mechanical seal device, and its simple in structure, good sealing effect need not dismantled main frame and just can check, debug, and maintenance is convenient, and the production and the user cost of seal arrangement are low.

The technical solution of the utility model is as follows: a kind of external mechanical seal device, comprise the moving ring assembly and the static components that are enclosed within on the main shaft, the rotating ring of described moving ring assembly and the stationary ring of static components are inconsistent, it is characterized in that: described static components comprises the stationary ring body that is enclosed within on the main shaft, the rear portion disk of this stationary ring body offsets by the exterior edge face of spring and pump cover, stop pin is housed on this disk to be inserted in the pump cover, the anterior ring set of described stationary ring body stretches into the cylindrical of described pump cover and this ring set and the endoporus of pump cover is sealed and matched, and is fastened with stationary ring in the rear portion endoporus of described stationary ring body; Described moving ring assembly comprises rotating ring body and the rotating ring that is positioned at described static components rear side, and the endoporus of described rotating ring body and rotating ring cooperates with described main shaft seal, and described rotating ring body is connected with described main shaft by driving pin radially.

For can be in seal arrangement wearing and tearing back or pump chamber pressure when changing, adjust the decrement of spring, reach the purpose of adjusting mechanical seal pressure, as further improvement, the rear portion of described rotating ring body has axial groove, the described driving pin that inserts main shaft is housed in this groove, has adjusting nut on the ear end face of described rotating ring body.The rotation adjusting nut just can be pressed to static components with moving ring assembly, thus pressure spring, sealing medium.

In order to realize the sealing between static components and the pump cover inner hole wall, as further improvement, on the anterior ring set of described stationary ring body the stationary ring seal ring is housed, this stationary ring seal ring and the contact seal of described pump cover endoporus.

As further improvement project, the rear portion disk of described stationary ring body is provided with the axle spring hole, and the spring that offsets with described pump cover exterior edge face is housed in this spring eye.

As further improvement project, the front portion of described rotating ring body is provided with shoulder hole, be fastened with rotating ring in the preceding hole of this shoulder hole, in this rotating ring ear end face and the formed annular groove of shoulder hole metapore, seal ring of moving ring be housed, thereby realize the sealing between moving ring assembly and the main shaft external cylindrical surface.

The utility model is positioned at the pump cover Seal cage except the forward sealing portion of static components; remaining sealed member all is positioned at pump cover Seal cage outside; need not shut down, need not take apart the runnability of main frame during operation, can clearly observe leakage point during seal leakage so that adjust targetedly or maintenance with regard to the observable seal arrangement.Static components is encircled by way of compensation and press to moving ring assembly all the time under the effect of spring force, makes stationary ring and rotating ring be tending towards closed all the time, makes the medium in the Seal cage terminate in the rotating ring end face, realizes the motive sealing of main shaft and pump cover.

Owing to adopted technique scheme, the beneficial effects of the utility model are:

1, seal arrangement exposes, and need not shut down, need not take apart the runnability of main frame with regard to the observable seal arrangement, adjusts, maintenance is very convenient, reduced the repair time, reduced labor intensity, and maintenance cost is low;

2, set up adjusting nut, but do not tear just easy adjustment amount of spring compression of main frame open, reach the purpose of adjusting mechanical seal pressure;

3, simple in structure, cost of production is low, dynamic and static ring sealing, good sealing effect.

Description of drawings

Fig. 1 is the structural representation of stuffing seal.

Fig. 2 is the structural representation of internally mounted mechanical seal device.

Fig. 3 is a structural representation of the present utility model.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

As shown in Figure 3, a kind of external mechanical seal device is made up of stationary ring body 1, stationary ring 2, spring 3, stationary ring seal ring 4, stop pin 5, rotating ring body 6, rotating ring 7, seal ring of moving ring 8, driving pin 9 and adjusting nut 10.Wherein, the stationary ring body 1 that is enclosed within on the main shaft 11 is made of ring set 1b and disk 1a, the rear portion disk 1a of stationary ring body 1 is provided with the axle spring hole, the spring 3 that offsets with pump cover 12 exterior edge faces is housed in this spring eye, axial retention pin 5 is housed on this disk 1a inserts in the pump cover 12, realize the circumferentially fixing of stationary ring body 1.The anterior ring set 1b of stationary ring body 1 stretches into pump cover 12, and the endoporus of the cylindrical of this ring set 1b and pump cover 12 is sealed and matched, and on the anterior ring set 1b stationary ring seal ring 4 is housed, this stationary ring seal ring 4 and pump cover 12 endoporus contact seals.Be fastened with stationary ring 2 in the endoporus of the rear portion of stationary ring body 1, stationary ring body 1 and stationary ring 2 are formed static components.The rear side of static components is the moving ring assembly that is enclosed within on the main shaft 11, moving ring assembly is made up of rotating ring body 6 and rotating ring 7, the endoporus of rotating ring body 6 and rotating ring 7 and main shaft 11 are sealed and matched, the front portion of rotating ring body 6 is provided with shoulder hole, be fastened with rotating ring 7 in the preceding hole of this shoulder hole, in these rotating ring 7 ear end faces and the formed annular groove of shoulder hole metapore, seal ring of moving ring 8 be housed.

As shown in Figure 3, the rear portion of rotating ring body 6 has axial groove 6a, and the driving pin 9 that radially inserts main shaft 11 is housed in this groove, and the driving pin 9 that rotating ring body 6 is passed through radially is connected with main shaft 11, has adjusting nut 10 on the ear end face of rotating ring body 6.Like this, the torque of main shaft 11 can pass to rotating ring body 6 by driving pin 9, drive rotating ring 7 rotations by rotating ring body 6, when seal arrangement wearing and tearing back or pump chamber pressure change, can rotate adjusting nut 10, promote moving ring assembly by adjusting nut 10 and press to static components, thereby adjust the decrement of spring 3, reach the purpose of adjusting mechanical seal pressure.And axial groove 6a can make rotating ring body 6 under the promotion of adjusting nut 10, does certain moving axially with respect to driving pin 9.Static components is under the effect of spring force, and the stationary ring 2 of its rear end is pressed to the rotating ring 7 of moving ring assembly front end all the time, and stationary ring 2 is inconsistent all the time with rotating ring 7, makes the medium in the Seal cage terminate in rotating ring 7 end faces, realizes the motive sealing of main shaft 11 and pump cover 12.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. external mechanical seal device, comprise the moving ring assembly and the static components that are enclosed within on the main shaft (11), the stationary ring (2) of rotating ring of described moving ring assembly (7) and static components is inconsistent, it is characterized in that: described static components comprises the stationary ring body (1) that is enclosed within on the main shaft (11), the rear portion disk (1a) of this stationary ring body (1) offsets by the exterior edge face of spring (3) with pump cover (12), stop pin (5) is housed on this disk (1a) inserts in the pump cover (12); The anterior ring set (1b) of described stationary ring body (1) stretches into described pump cover (12), and the endoporus of cylindrical of this ring set (1b) and pump cover (12) is sealed and matched, and is fastened with stationary ring (2) in the rear portion endoporus of described stationary ring body (1); Described moving ring assembly comprises rotating ring body (6) and the rotating ring (7) that is positioned at described static components rear side, the endoporus of described rotating ring body (6) and rotating ring (7) and described main shaft (11) are sealed and matched, and described rotating ring body (5) is connected with described main shaft (11) by driving pin (9) radially.

2. external mechanical seal device according to claim 1, it is characterized in that: the rear portion of described rotating ring body (6) has axial groove (6a), the described driving pin (9) that inserts main shaft (11) is housed in this groove, has adjusting nut (10) on the ear end face of described rotating ring body (6).

3. external mechanical seal device according to claim 1 is characterized in that: on the anterior ring set (1b) of described stationary ring body (1) stationary ring seal ring (4) is housed, this stationary ring seal ring (4) and described pump cover (12) endoporus contact seal.

4. external mechanical seal device according to claim 1 is characterized in that: the rear portion disk (1a) of described stationary ring body (1) is provided with the axle spring hole, and the spring (3) that offsets with described pump cover (12) exterior edge face is housed in this spring eye.

5. external mechanical seal device according to claim 1 and 2, it is characterized in that: the front portion of described rotating ring body (6) is provided with shoulder hole, be fastened with rotating ring (7) in the preceding hole of this shoulder hole, in this rotating ring (7) ear end face and the formed annular groove of shoulder hole metapore, seal ring of moving ring (8) be housed.