CN203463665U

CN203463665U - Chamber-type double-end-face mechanical seal device

Info

Publication number: CN203463665U
Application number: CN201320488117.XU
Authority: CN
Inventors: 邱晓虹; 吕泽银
Original assignee: SICHUAN DINOSAUR MECHANICAL SALES Co Ltd
Current assignee: Chengdu Environmental Protection Technology Co.,Ltd. Dan Ross
Priority date: 2013-08-12
Filing date: 2013-08-12
Publication date: 2014-03-05
Anticipated expiration: 2023-08-12

Abstract

The utility model discloses a chamber-type double-end-face mechanical seal device and belongs to the field of sealing techniques. The chamber-type double-end-face mechanical seal device is characterized in that a seal chamber body is sleeved on a shaft sleeve, the end face of the seal chamber body is fitted with a press cover in a sealed manner, and a seal chamber is formed in a space between the seal chamber body and the shaft sleeve; the seal chamber is internally provided with a pushing ring, a spring and a seal assembly, the pushing ring is sleeved on the shaft sleeve in a sealing manner, two ends of the pushing ring are respectively sealed with the seal chamber body and the press cover through the seal assembly and can rotate relatively, the spring is sleeved on the shaft sleeve with two ends respectively abutted against the seal assembly. By the arrangement, an entire secondary seal assembly is fully soaked in cooling water to be well cooled, medium pressure can be balanced by increasing cooling water pressure, medium leakage is effectively prevented, sealing effect is enhanced, and service life of the seal device is prolonged.

Description

Cavity type double end-face mechanical sealing device

Technical field

The utility model relates to a kind of sealing technique, particularly a kind of cavity type double mechanical seal.

Background technique

At present, widely used double end-face mechanical sealing device, does not exist any measure to carry out seal arrangement cooling, sealing be can not get good cooling, thereby affects sealing effect; In addition, existing sealed member is to be exposed to appearance, and the cooling effect of sealed member is bad, has also just caused the life-span of sealed member shorter.

Model utility content

Goal of the invention of the present utility model is: for the problem of above-mentioned existence, a kind of cavity type double end-face mechanical sealing device is provided, make whole secondary black box all be immersed in cooling water, secondary sealing is obtained good cooling, and can balance media pressure by increasing cooling water pressure, effectively prevent the leakage of medium, thereby strengthen sealing effect, improved sealing working life simultaneously; Prevent from, because the excessive caused stationary ring of pressure medium is pushed phenomenon, having strengthened sealing effect simultaneously; Effectively prevented the O shape circle displacement causing because pressure medium is excessive, sealing effect is good; Strengthen the ability that machine seals anti-obstruction, improved working life of machine envelope; Prevent the corrosion of medium to machine envelope, improved the working life of machine envelope.

The technical solution adopted in the utility model is as follows:

Cavity type double end-face mechanical sealing device of the present utility model, has seal chamber at axle sleeve overcoat, and the end face seal of described seal chamber is fitted with gland, makes the space between seal chamber and axle sleeve form Seal cage; In described Seal cage, be provided with throw-out collar, spring and black box, described throw-out collar sealing is placed on axle sleeve, the two ends of described throw-out collar are formed sealing and can be relatively rotated by black box and seal chamber, gland respectively, and described spring is placed on outside axle sleeve and beam section is butted on black box respectively.

Owing to adopting said structure, at axle sleeve, Seal cage is set outward, in Seal cage, can fill more cooling water, whole secondary black box is all immersed in cooling water, secondary sealing is obtained good cooling, and can balance media pressure by increasing cooling water pressure, effectively prevent the leakage of medium, thereby strengthen sealing effect, improved sealing working life simultaneously; Adopt big spring structure, strengthened the ability that machine seals anti-obstruction; Seal cage has effectively prevented that most of area of machine envelope from contacting with the direct of medium, thereby has prevented the corrosion of medium to machine envelope, thereby has improved the working life of machine envelope.

Cavity type double end-face mechanical sealing device of the present utility model, described black box comprises stationary ring and rotating ring, the two end part of described throw-out collar are all connected with rotating ring, the two ends of described spring are butted on respectively on two rotating rings, away from being all to have stationary ring on the inner wall of end of gland and the inwall of gland, bonded to each other and can relative sliding between described rotating ring and stationary ring on described seal chamber.

Owing to adopting said structure, in major and minor black box, stationary ring, rotating ring and throw-out collar size are identical, interchangeable, and processing technology is simple, and assembling easily; Wherein rotating ring is connected in the two end part of throw-out collar, can rotate with axle sleeve, stationary ring is connected on seal chamber away from the inner wall of end of gland and on the inwall of gland, when axle sleeve is rotated, stationary ring can be static with respect to seal chamber, thereby realize the relative sliding between rotating ring and stationary ring, in order to guarantee the sealing effect in seal ring, when therefore requiring the sealing bonded to each other between rotating ring and stationary ring, can relative sliding between rotating ring and stationary ring, thus the sealing effect of whole seal arrangement guaranteed.

Cavity type double end-face mechanical sealing device of the present utility model, the inwall of described gland is connected with stationary ring by bearing pin, on described seal chamber, away from the inner wall of end of gland, be provided with the elastic collar of restriction stationary ring, described stationary ring is connected in seal chamber on the inner wall of end away from gland by bearing pin.

Owing to adopting said structure, bearing pin can limit the movement of stationary ring on axle is tangential, avoids it that the movement of axle on tangential in use occurs; The axial position of spring collar restriction stationary ring for major-minor sealed end, prevents from, because the excessive caused stationary ring of pressure medium is pushed phenomenon, having strengthened sealing effect.

Cavity type double end-face mechanical sealing device of the present utility model, between described rotating ring and throw-out collar, be provided with O RunddichtringO, described O RunddichtringO is placed on outside axle sleeve, make the inner wall sealing at described throw-out collar two ends outside axle sleeve, and between throw-out collar inwall and axle sleeve outer wall, be provided with cavity, the sidewall of described throw-out collar is provided with the intercommunicating pore of communication seals chamber and cavity.

Owing to adopting said structure, O shape cast formula between rotating ring and throw-out collar is push-press type, effectively prevented the O shape circle displacement causing because pressure medium is excessive, sealing effect is good, the intercommunicating pore on throw-out collar sidewall wherein, Seal cage can be communicated with cavity, can make cooling water in seal ring enter in this cavity, axle sleeve to be carried out cooling, guarantee that the cooling effect of whole axle sleeve is better.

In sum, owing to having adopted technique scheme, the beneficial effects of the utility model are:

1, cavity type double end-face mechanical sealing device of the present utility model, is all immersed in cooling water whole secondary black box, secondary sealing is obtained good cooling;

2, cavity type double end-face mechanical sealing device of the present utility model, can balance media pressure by increasing cooling water pressure, effectively prevents the leakage of medium, thereby strengthen sealing effect, has improved sealing working life simultaneously;

3, cavity type double end-face mechanical sealing device of the present utility model, prevents from, because the excessive caused stationary ring of pressure medium is pushed phenomenon, having strengthened sealing effect; Effectively prevented the O shape circle displacement causing because pressure medium is excessive, sealing effect is good;

4, cavity type double end-face mechanical sealing device of the present utility model, has strengthened the ability that machine seals anti-obstruction, has improved the working life of machine envelope; Prevent the corrosion of medium to machine envelope, improved the working life of machine envelope.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Mark in figure: 1,2,6,9,11-O RunddichtringO, 3-stationary ring, 4-elastic collar, 5-rotating ring, 7-throw-out collar, 8-spring, 10-seal chamber, 12-gland, 13,15-socket head screw, 14-axle sleeve.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in detail.

In order to make the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.

As shown in Figure 1, cavity type double end-face mechanical sealing device of the present utility model, comprise the axle sleeve 14 being placed on axle, at axle sleeve 14 overcoats, there is seal chamber 10, the end face seal laminating (being provided with O RunddichtringO 11 seals) of described seal chamber 10 has gland 12, and by socket head screw 13, connect, make the space between seal chamber 10 and axle sleeve 14 form Seal cage, in described Seal cage, be provided with throw-out collar 7, spring 8 and black box, described throw-out collar 7 sealings are placed on axle sleeve 14, the two ends of described throw-out collar 7 are respectively by black box and seal chamber 10, gland 12 forms sealing and can relatively rotate, described spring 8 is placed on outside axle sleeve 14 and beam section is butted on respectively on black box, wherein said black box comprises stationary ring 3 and rotating ring 5, the two end part of described throw-out collar 7 are all connected with rotating ring 5, the two ends of described spring 8 are butted on respectively on two rotating rings 5, on described seal chamber 10 away from being all to have stationary ring 3 on the inner wall of end of gland 12 and the inwall of gland 12, bonded to each other and can relative sliding between described rotating ring 5 and stationary ring 3, the inwall of wherein said gland 12 is connected with stationary ring 3 by bearing pin, on described seal chamber 10, away from the inner wall of end of gland 12, be provided with the elastic collar 4 of restriction stationary ring 3, described stationary ring 3 is connected on the interior inner wall of end away from gland 12 of seal chamber 10 by bearing pin, and between stationary ring 3 and seal chamber 10, by O RunddichtringO 2, seal, between stationary ring 3 and gland 12 inwalls, by O RunddichtringO 2, seal, between wherein said rotating ring 5 and throw-out collar 7, be provided with O RunddichtringO 6, described O RunddichtringO 6 is placed on outside axle sleeve 14, make the inner wall sealing at described throw-out collar 7 two ends outside axle sleeve 14, and be provided with cavity between throw-out collar 7 inwalls and axle sleeve 14 outer walls, the sidewall of described throw-out collar 7 is provided with the intercommunicating pore of communication seals chamber and cavity, between the two ends of its Intermediate shaft sleeve 14 and axle, O RunddichtringO 1 can be set, make to form effectively sealing between axle sleeve 14 and axle, outside seal chamber 10, can connect by socket head screw 15 in addition.

Cavity type double end-face mechanical sealing device of the present utility model, is all immersed in cooling water whole secondary black box, secondary sealing is obtained good cooling; Can balance media pressure by increasing cooling water pressure, effectively prevent the leakage of medium, thereby strengthen sealing effect, improved sealing working life simultaneously; Prevent from, because the excessive caused stationary ring of pressure medium is pushed phenomenon, having strengthened sealing effect; Effectively prevented the O shape circle displacement causing because pressure medium is excessive, sealing effect is good; Strengthen the ability that machine seals anti-obstruction, improved working life of machine envelope; Prevent the corrosion of medium to machine envelope, improved the working life of machine envelope.

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

Claims

1. cavity type double end-face mechanical sealing device, comprise the axle sleeve (14) being placed on axle, it is characterized in that: at axle sleeve (14) overcoat, have seal chamber (10), the end face seal of described seal chamber (10) is fitted with gland (12), makes the space between seal chamber (10) and axle sleeve (14) form Seal cage; In described Seal cage, be provided with throw-out collar (7), spring (8) and black box, described throw-out collar (7) sealing is placed on axle sleeve (14), the two ends of described throw-out collar (7) are formed sealing and can be relatively rotated by black box and seal chamber (10), gland (12) respectively, and described spring (8) is placed on outside axle sleeve (14) and beam section is butted on black box respectively.

2. cavity type double end-face mechanical sealing device as claimed in claim 1, it is characterized in that: described black box comprises stationary ring (3) and rotating ring (5), the two end part of described throw-out collar (7) are all connected with rotating ring (5), the two ends of described spring (8) are butted on respectively on two rotating rings (5), described seal chamber (10) is upper away from being all to have stationary ring (3) on the inner wall of end of gland (12) and the inwall of gland (12), bonded to each other and can relative sliding between described rotating ring (5) and stationary ring (3).

3. cavity type double end-face mechanical sealing device as claimed in claim 2, it is characterized in that: the inwall of described gland (12) is connected with stationary ring (3) by bearing pin, the upper inner wall of end away from gland (12) of described seal chamber (10) is provided with the elastic collar (4) of restriction stationary ring (3), and described stationary ring (3) is connected on the interior inner wall of end away from gland (12) of seal chamber (10) by bearing pin.

4. the cavity type double end-face mechanical sealing device as described in claim 1 or 2 or 3, it is characterized in that: between described rotating ring (5) and throw-out collar (7), be provided with O RunddichtringO (6), described O RunddichtringO (6) is placed on outside axle sleeve (14), make the inner wall sealing at described throw-out collar (7) two ends outside axle sleeve (14), and between throw-out collar (7) inwall and axle sleeve (14) outer wall, be provided with cavity, the sidewall of described throw-out collar (7) is provided with the intercommunicating pore of communication seals chamber and cavity.