CN202971912U

CN202971912U - Structure enhancement type single end face mechanical seal

Info

Publication number: CN202971912U
Application number: CN 201220681558
Authority: CN
Inventors: 于越; 夏伟; 许永兰; 夏茂林; 赵春桂; 夏茂春
Original assignee: JIANGSU YITONG FLUID TECHNOLOGY Co Ltd
Current assignee: JIANGSU YITONG FLUID TECHNOLOGY Co Ltd
Priority date: 2012-12-12
Filing date: 2012-12-12
Publication date: 2013-06-05
Anticipated expiration: 2022-12-12

Abstract

The utility model discloses a structure enhancement type single end face mechanical seal which comprises a shaft sleeve, a movable ring, a transmission shaft arranged between the end face of the movable ring and the shaft sleeve, a stationary ring matching with the end face of the movable ring, a gland, a movable ring sealing ring arranged between a stationary ring outer circle and the gland, a spring, an anti-rotating pin and a limiting block arranged between the shaft sleeve and the gland, wherein the spring and the anti-rotating pin are arranged on the gland. A push ring is further arranged between the stationary ring and the gland. An end face groove is arranged in the end face, opposite to the push ring, of the stationary ring. A poking block is tightly arranged in the end face groove in a matching mode. The other end of the poking block is arranged on the push ring. The anti-rotating pin arranged on the gland is connected with the push ring. The end face of the push ring is connected with the spring arranged on the gland. The structure enhancement type single end face mechanical seal has the advantages of being capable of reducing stress of a grooving portion of a connection position between the stationary ring and the anti-rotating pin, enabling the stationary ring not to be prone to crack in the process of normal operation, and guaranteeing normal use of a sealing device.

Description

The single mechanical end face seal of a kind of structural reinforcing type

Technical field

The utility model relates to a kind of mechanical seal structure, refers in particular to the single mechanical end face seal that is applied to contain particle, impurity and large viscosity medium.

Background technique

Mechanical seal is applied widely, and its applying working condition is also complicated various, and for different use occasions, the structure of mechanical seal also must change thereupon.When the medium that will seal contains particle, impurity, or the viscosity of medium in case medium enters among the elastic elements such as spring, will cause the clamping stagnation of spring when larger, makes stationary ring lose compensation ability, and then affects seal face pressure, causes leakage.Thereby the structural feature of such mechanical seal is that elastic element is arranged between stationary ring and gland, and between stationary ring and gland with the seal ring sealing, elastic element does not directly contact with medium fluid like this, thereby has guaranteed the normal effect of compensate function.the common structure of this class mechanical seal is that moving ring sleeve is contained on the cylindrical of axle sleeve, the one end has end face groove, rotated with axle sleeve by the driving pin drive that is arranged on axle sleeve, the other end of rotating ring coordinates the formation seal face with stationary ring, stationary ring is sleeved on axle sleeve equally, be provided with spring between its other end and gland, guarantee the end force between stationary ring and rotating ring, this end also is provided with end face groove, by this groove, stationary ring is maintained a fixed by the stop pin that is arranged on gland, being provided with the O RunddichtringO between the cylindrical of stationary ring and gland hole prevents the gap of medium between stationary ring and gland to external leakage, also guaranteed simultaneously spring not with medium contact.but, this class formation easily causes stationary ring burst apart and cause seal failure in frequent start, analyze its reason and be owing to contacting for line between stationary ring stop pin and stationary ring, and also there is certain interval between stationary ring and stop pin, when axle sleeve drives the rotating ring rotation, moving, frictional force between stationary ring will pass to the certain torque of stationary ring, but being arranged on the end face groove that the stop pin on gland opens by the stationary ring end face stops stationary ring that it can't be rotated, to be subject to larger impact force on end face groove on stationary ring at this moment, and stationary ring for can guarantee and rotating ring between working life of seal face, usually all select wear resistance good, the material that hardness is high, but this class material impact toughness can be lower, in the situation that frequent start, the end face groove of stationary ring can be impacted every now and then, tend to cause bursting apart of this place, making seal arrangement damage causes the accident.

The model utility content

Technical problem to be solved in the utility model is to provide the single mechanical end face seal of a kind of structural reinforcing type, it can reduce on stationary ring stressed with fluting position, stop pin joint, make that stationary ring can be difficult for bursting apart in the normal boot-strap working procedure, guarantee the normal use of seal arrangement.

for solving the problems of the technologies described above, a kind of structural reinforcing type of the present utility model single mechanical end face seal, comprise axle sleeve, rotating ring, be arranged on the driving pin between rotating ring end face and axle sleeve, the stationary ring that coordinates with the rotating ring end face, gland, seal ring of moving ring between stationary ring cylindrical and gland hole, be arranged on spring and stop pin on gland, and the limiting stopper between axle sleeve and gland, also be provided with throw-out collar between described stationary ring and gland, be provided with end face groove on the described stationary ring end face relative with throw-out collar, in this end face groove, close-fitting has shifting block, the other end of this shifting block is arranged on throw-out collar, the stop pin that is arranged on gland is connected on throw-out collar, throw-out collar keeps end face to be connected with spring on being arranged on gland.

in said structure, because shifting block is that close-fitting is in the end face groove of stationary ring, therefore shifting block can be looked and stationary ring is integrated, suffered larger torque meeting of the moment that stationary ring starts in seal arrangement work is delivered on throw-out collar by the other end of shifting block, be delivered on gland by the stop pin that connects on throw-out collar again, that is to say, locking function during stationary ring work is by shifting block, throw-out collar, stop pin, these part interoperations of gland are realized, due to the close-fitting that is not shifting block and being connected of throw-out collar as being connected of shifting block and stationary ring, and the cooperation that is connected between stop pin and gland neither close-fitting character, but belong to Spielpassung, the stop process of stationary ring has a slight time difference like this, making stationary ring is not the impact that is subject to immediately detent torque, and along with moving after starting, friction between stationary ring becomes kinetic friction by static friction, the suffered torque meeting of stationary ring descends thereupon, simultaneously because throw-out collar self is a kind of annulus class part, its rigidity can't be very strong, it does not need to adopt the material with the low toughness of higher hardness as stationary ring yet, so can produce some trickle distortion after it is stressed, this has just absorbed larger impact energy, comprehensive above-mentioned effect, stationary ring reduced before the moment of seal arrangement startup work, suffered impact meeting improved a lot, the possibility of bursting apart in stationary ring end face groove place reduces greatly, like this, the normal operation of whole seal arrangement has obtained guarantee.

A kind of preferred implementation of the present utility model, the part of described shifting block close-fitting in the stationary ring end face groove is face with the bi-side of this groove and coordinates.Like this, can improve better the force-bearing situation of stationary ring, prevent that the reliability of whole like this mechanical seal device is higher because shifting block and cooperation between stationary ring are that line contacts that may to be even that a contact produces the stress of stationary ring end face groove root concentrated.

Another kind of preferred implementation of the present utility model, coordinating between described stop pin and gland is Spielpassung, the suffered startup impact torque of stationary ring is cushioned in time, when also making simultaneously this mechanical seal device manufacture with assembling more for convenience.

Description of drawings

Single mechanical end face seal is described in further detail to a kind of structural reinforcing type of the utility model below in conjunction with the drawings and specific embodiments.

Fig. 1 is the structural representation of a specific embodiment of a kind of structural reinforcing type of the utility model single mechanical end face seal

Fig. 2 is the assembly relation schematic diagram of middle throw-out collar embodiment illustrated in fig. 1, shifting block and stop pin

Fig. 3 is the sectional drawing of Fig. 2

In figure: 1-pad, 2-axle sleeve, 3-sleeve sealing circle, 4-driving pin, 5-seal ring of moving ring, 6-rotating ring, 7-stationary ring, 8-stationary ring seal ring, 9-shifting block, 10-throw-out collar, 11-stop pin, 12-spring, 13-gland, 14-seal ring, 15-retaining ring, 16-limiting stopper.

Embodiment

A kind of structural reinforcing type single mechanical end face seal shown in Figure 1, its left end is in the active chamber that needs sealing, on axle sleeve 2 left side endoporus, sleeve sealing circle 3 is installed, can form static seal with the rotating shaft of axle sleeve 2 interior installations, axle sleeve 2 rotates with rotating shaft, and axle sleeve 2 left end end faces are by pad 1 sealing;

On axle sleeve 2 left end cylindricals, rotating ring 6 is installed, rotating ring 6 is equipped with seal ring of moving ring 5 and is formed static seal by driving pin 4 transmissions that are arranged on axle sleeve 2 between rotating ring 6 left end cylindricals and axle sleeve 2, and seal ring of moving ring 5 is the O RunddichtringO;

The right-hand member that forms the stationary ring 7 of end face seals with rotating ring 6 is arranged in gland 13 holes, and stationary ring seal ring 8 formation static seals are installed between stationary ring 7 right-hand member cylindricals and gland 13, and stationary ring seal ring 8 is the O RunddichtringO;

Have two end face grooves on stationary ring 7 right sides, the both ends of the surface groove is symmetrical arranged at its circumferencial direction, and close-fitting is equipped with shifting block 9 in end face groove, and shifting block 9 is the plane with the contact both sides face of described end face groove, and the other end of shifting block 9 is arranged in throw-out collar 10;

The outstanding end face of throw-out collar 10 left ends is connected with stationary ring 7, two stop pins 11 are installed on the right side of throw-out collar 10, on throw-out collar 10, two mounting holes of two of shifting block 9 mounting holes and stop pin 11 are uniform on circumference, the other end of stop pin 11 is arranged on gland 13, and with mounting hole on gland 13 be Spielpassung;

Four springs 12 also are installed between throw-out collar 10 right sides and gland 13, and the active force of this spring 12 is delivered on stationary ring 7 by throw-out collar 10, makes the certain pressure of maintenance between stationary ring 7 and rotating ring 6 end faces, to guarantee its sealing effect.

Seal ring 14 also is installed in the hole of gland 13 right-hand members, gland 13 right-hand members also are provided with the draw-in groove of circumferencial direction, be installed with retaining ring 15 on the right-hand member cylindrical of axle sleeve 2, limiting stopper 16 is the subdivision structure, the one end is fixedly connected on retaining ring 15, the other end is stuck in the draw-in groove of gland 13 right-hand members, determines the axial mounting point of whole each part of seal arrangement with this.

Below only enumerated a kind of preferred embodiment of the present utility model; but the utility model is not limited to this; can also make corresponding improvement and conversion; shifting block 9 as described and the quantity of stop pin 11 can change selection according to the size of seal arrangement; the quantity of spring 12 also can require according to the pressure of seal face to adjust; so, as long as in the situation that improvement and the conversion done without prejudice to the utility model basic principle all should fall into protection domain of the present utility model.

Claims

1. structural reinforcing type single mechanical end face seal, comprise axle sleeve (2), rotating ring (6), be arranged on the driving pin (4) between rotating ring (6) end face and axle sleeve (2), the stationary ring (7) that coordinates with rotating ring (6) end face, gland (13), seal ring of moving ring (3) between stationary ring (7) cylindrical and gland hole, be arranged on spring (12) and stop pin (11) on gland (13), and the limiting stopper (16) between axle sleeve (2) and gland (13), it is characterized in that: also be provided with throw-out collar (10) between described stationary ring (7) and gland (13), described stationary ring (7) with throw-out collar (10) opposing end surface on be provided with end face groove, in this end face groove, close-fitting has shifting block (9), the other end of this shifting block (9) is arranged on throw-out collar (10), the stop pin (11) that is arranged on gland (13) is connected on throw-out collar (10), throw-out collar (10) keeps end face to be connected with spring (12) on being arranged on gland (13).

2. mechanical seal device according to claim 1, it is characterized in that: the part of described shifting block (9) close-fitting in stationary ring (7) end face groove is face with the bi-side of this groove and coordinates.

3. mechanical seal device according to claim 1, is characterized in that: be Spielpassung between described stop pin (11) and gland (13).