CN213331661U - Forced calibration circulating pump mechanical sealing device - Google Patents
Forced calibration circulating pump mechanical sealing device Download PDFInfo
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- CN213331661U CN213331661U CN202021434919.9U CN202021434919U CN213331661U CN 213331661 U CN213331661 U CN 213331661U CN 202021434919 U CN202021434919 U CN 202021434919U CN 213331661 U CN213331661 U CN 213331661U
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- ring
- movable ring
- shaft sleeve
- ring seat
- seat
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Abstract
The utility model discloses a forced-calibration circulating pump mechanical sealing device, which comprises a shaft sleeve fixedly sleeved on a main shaft, a movable ring and a static ring, wherein the movable ring and the static ring are used for matching and sealing; the rear end of the compensation spring is provided with a framework oil seal; the movable ring is fixed on the shaft sleeve by a movable ring seat; the shaft sleeve is provided with an annular boss, and the inner annular surface of the movable ring seat is provided with a step matched with the boss; the upper part and the lower part of the step of the inner annular surface of the movable ring seat are respectively provided with an installation groove, and an O-shaped sealing ring is arranged in each installation groove; the two O-shaped sealing rings, the movable ring seat and the shaft sleeve enclose a cavity. A high-pressure air cushion is formed between the movable ring assembly and the shaft sleeve, and the mechanical stress deformation of a sealing surface caused by the hard contact between the movable ring assembly and the shaft sleeve is prevented.
Description
Technical Field
The utility model relates to a mechanical seal device.
Background
The mechanical seal is a shaft seal device of a rotating machine. Such as centrifugal pumps, centrifuges, reaction kettles, compressors, and the like. Since the drive shaft extends through the inside and outside of the apparatus, there is a circumferential gap between the shaft and the apparatus through which the medium in the apparatus leaks out, and if the pressure in the apparatus is lower than atmospheric pressure, air leaks into the apparatus, so that a shaft seal device must be provided to prevent leakage. The shaft seal has many kinds, and the mechanical seal has the advantages of small leakage amount, long service life and the like, so the mechanical seal is the most important shaft sealing mode in the devices in the world. Mechanical seals, also called face seals, are defined in the relevant national standards as follows: "means for preventing fluid leakage, which is composed of at least one pair of end faces perpendicular to the rotation axis, and which are kept in fit and relatively slide under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism and the cooperation of the auxiliary seal. "
The moving ring and the shaft sleeve of the conventional forced-calibration circulating pump mechanical sealing device are in hard contact, so that the sealing surface is easy to deform due to mechanical stress, the sealing is ineffective, and the service life of the mechanical sealing device is shortened.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a force school circulating pump mechanical seal device forms the air cushion and avoids moving ring seat and the hard contact of axle sleeve between moving ring seat and axle sleeve.
In order to solve the technical problem, the technical scheme of the utility model is to adopt a mechanical sealing device of a forced-straightening circulating pump, which comprises a shaft sleeve fixedly sleeved on a main shaft, a movable ring and a static ring for matching and sealing, wherein the static ring is fixed on the circulating water sleeve through a static ring seat, and the rear end of the static ring is provided with a compensation spring for compensation; the rear end of the compensation spring is provided with a framework oil seal; the movable ring is fixed on the shaft sleeve by a movable ring seat; the shaft sleeve is provided with an annular boss, and the inner annular surface of the movable ring seat is provided with a step matched with the boss; the upper part and the lower part of the step of the inner annular surface of the movable ring seat are respectively provided with an installation groove, and an O-shaped sealing ring is arranged in each installation groove; the two O-shaped sealing rings, the movable ring seat and the shaft sleeve enclose a cavity.
As an improvement, the boss is subjected to chamfering treatment. The integrity of the O-shaped sealing ring is prevented from being damaged in the assembling process.
As a further improvement, a push ring is arranged between the compensation spring and the static ring. For transmitting the thrust of the compensating spring.
As an improvement, the spindle sleeve further comprises a fastening ring for fixing the spindle sleeve on the spindle.
As an improvement, a limiting gasket is arranged between the fastening ring and the framework oil seal. Used for limiting the framework oil seal.
The utility model discloses an useful part lies in: according to the mechanical sealing device with the structure, the high-pressure air cushion is formed between the movable ring assembly and the shaft sleeve, and the mechanical stress deformation of the sealing surface caused by the hard contact formed between the movable ring assembly and the shaft sleeve is prevented. And because the existence of the air cushion and the O-shaped sealing ring, the mechanical sealing device also has certain buffer effect on the phenomena of mechanical impact, jumping, play and the like, and improves the adaptability of the mechanical sealing device to the use environment. Meanwhile, the two O-shaped rings can play a role in sealing, the outer O-shaped ring is directly contacted with a medium and can be aged and failed earlier, and even if the air cushion fails, the inner O-shaped sealing ring still can play a role in sealing, so that the service life of the mechanical sealing device is further prolonged.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The labels in the figure are: 1-shaft sleeve, 2-O-shaped sealing ring, 3-movable ring seat, 4-O-shaped sealing ring, 5-stationary ring seat, 6-push ring, 7-circulating water jacket, 8-gland, 9-compensating spring, 10-skeleton oil seal, 11-limit gasket, 12-fastening ring, 13-cavity, 14-movable ring and 15-stationary ring.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the specific embodiments.
As shown in fig. 1, the utility model comprises a shaft sleeve fixedly sleeved on a main shaft, a movable ring and a static ring which are used for matching and sealing, wherein the static ring is fixed on a circulating water sleeve through a static ring seat, and the rear end of the static ring is provided with a compensating spring for compensation; a push ring is arranged between the compensation spring and the static ring. The rear end of the compensation spring is provided with a framework oil seal; the movable ring is fixed on the shaft sleeve by a movable ring seat; and an annular boss is arranged on the shaft sleeve, and the boss is subjected to chamfering treatment. The inner ring surface of the movable ring seat is provided with a step matched with the boss; the upper part and the lower part of the step of the inner annular surface of the movable ring seat are respectively provided with an installation groove, and an O-shaped sealing ring is arranged in each installation groove; the two O-shaped sealing rings, the movable ring seat and the shaft sleeve enclose a cavity. The spindle also comprises a fastening ring for fixing the shaft sleeve on the spindle. And a limiting gasket is arranged between the fastening ring and the framework oil seal.
The movable ring and the static ring are matched and sealed. After the movable ring assembly 3, the O-shaped sealing ring 2 and the O-shaped sealing ring 4 are installed on the shaft sleeve 1, a small-sized closed cavity 13 can be formed among the O-shaped sealing ring 2, the O-shaped sealing ring 4, the movable ring seat 3 and the shaft sleeve 1, the closed cavity 3 is located between the movable ring seat 3 and the shaft sleeve 1, the gap is small, and in the process that the movable ring seat 3 is gradually installed in place, the closed cavity 13 is compressed and reduced, so that the air pressure in the cavity is enhanced. When the movable ring seat 3 is installed in place, a layer of air cushion with higher pressure is formed between the movable ring seat 3 and the shaft sleeve 1 due to the fact that the pressure in the cavity is increased. And hard contact between the movable ring seat 3 and the shaft sleeve 1 is prevented, so that the sealing surface is prevented from generating mechanical stress deformation.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.
Claims (5)
1. The utility model provides a force school circulating pump mechanical seal device, includes fixed cover in the epaxial axle sleeve of main shaft and be used for the sealed rotating ring of cooperation and quiet ring, its characterized in that: the static ring is fixed on the circulating water sleeve through a static ring seat, and a compensation spring for compensation is arranged at the rear end of the static ring; the rear end of the compensation spring is provided with a framework oil seal; the movable ring is fixed on the shaft sleeve by a movable ring seat; the shaft sleeve is provided with an annular boss, and the inner annular surface of the movable ring seat is provided with a step matched with the boss; the upper part and the lower part of the step of the inner annular surface of the movable ring seat are respectively provided with an installation groove, and an O-shaped sealing ring is arranged in each installation groove; the two O-shaped sealing rings, the movable ring seat and the shaft sleeve enclose a cavity.
2. A positive calibration circulation pump mechanical seal according to claim 1, wherein: and chamfering the boss.
3. A positive calibration circulation pump mechanical seal according to claim 1, wherein: and a push ring is arranged between the compensation spring and the static ring.
4. A positive calibration circulation pump mechanical seal according to claim 1, wherein: the spindle also comprises a fastening ring for fixing the shaft sleeve on the spindle.
5. A positive calibration circulation pump mechanical seal according to claim 4, wherein: and a limiting gasket is arranged between the fastening ring and the framework oil seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021434919.9U CN213331661U (en) | 2020-07-20 | 2020-07-20 | Forced calibration circulating pump mechanical sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021434919.9U CN213331661U (en) | 2020-07-20 | 2020-07-20 | Forced calibration circulating pump mechanical sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213331661U true CN213331661U (en) | 2021-06-01 |
Family
ID=76089719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021434919.9U Active CN213331661U (en) | 2020-07-20 | 2020-07-20 | Forced calibration circulating pump mechanical sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213331661U (en) |
-
2020
- 2020-07-20 CN CN202021434919.9U patent/CN213331661U/en active Active
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