CN111271456A - Mechanical sealing device suitable for multi-working-condition vacuum equipment - Google Patents
Mechanical sealing device suitable for multi-working-condition vacuum equipment Download PDFInfo
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- CN111271456A CN111271456A CN202010182221.0A CN202010182221A CN111271456A CN 111271456 A CN111271456 A CN 111271456A CN 202010182221 A CN202010182221 A CN 202010182221A CN 111271456 A CN111271456 A CN 111271456A
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- sealing
- shaft sleeve
- bearing
- mechanical
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/162—Special parts or details relating to lubrication or cooling of the sealing itself
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3404—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/3452—Pressing means the pressing force resulting from the action of a spring
Abstract
The invention relates to the technical field of mechanical sealing, in particular to a mechanical sealing device suitable for multi-working-condition vacuum equipment, which comprises a transmission shaft, a shaft sleeve and a bearing, wherein the shaft sleeve and the bearing are sleeved on the transmission shaft, the bearing is arranged at one end of the shaft sleeve, a sealing seat is sleeved on the shaft sleeve, a first sealing cavity is arranged between the shaft sleeve and the sealing seat, a water retaining assembly is further sleeved on the shaft sleeve, and the water retaining assembly is arranged between the first sealing cavity and the bearing. According to the mechanical sealing device suitable for the multi-working-condition vacuum equipment, the water baffle is arranged on the shaft sleeve to change the flow direction of the cooling liquid leaked along the outer wall of the shaft sleeve, so that the cooling liquid cannot reach the bearing along the outer wall of the shaft sleeve, the bearing is protected, and the normal operation of the mechanical sealing is ensured.
Description
Technical Field
The invention relates to the technical field of mechanical sealing, in particular to a mechanical sealing device suitable for multi-working-condition vacuum equipment.
Background
At present, single-end-face, multi-spring, balanced, cartridge mechanical sealing devices and axial double-end-face, multi-spring, unbalanced, cartridge mechanical sealing devices are widely used in the industries of food, textile, machinery, electronics, power generation, petroleum, chemical industry, coal, metallurgy, cement and the like, and two mechanical sealing devices generally adopt framework oil seal sealing lubricating liquid to cool a sealing face or adopt flowing cooling liquid introduced into a sealing cavity to cool the sealing face.
However, influenced by the high-speed rotation of the equipment, the framework oil seal is easy to wear, a gap is generated between the shaft sleeve and the framework oil seal, and the leakage of lubricating liquid or cooling liquid along the rotating shaft occurs, so that the service life of the sealing surface of the equipment is reduced, the sealing failure of the equipment is caused, the leaked cooling liquid flows to the bearing on the rotating shaft along the rotating shaft easily, the normal use of the bearing is influenced, the bearing is damaged, the integral shutdown of the equipment is caused, the safety production of the whole production line is influenced in serious conditions, and the great economic loss is caused.
In summary, there is a need for a technical solution to solve the technical problem that the conventional mechanical sealing device is influenced by high-speed rotation of equipment, and liquid used for cooling a sealing surface is easy to leak along a rotating shaft, so that normal use of a bearing on the shaft is influenced, and the equipment is stopped, thereby causing great economic loss.
Disclosure of Invention
The invention aims to: aiming at the technical problems that in the prior art, a mechanical sealing device is influenced by high-speed rotation of equipment, liquid for cooling a sealing surface is easy to leak along a rotating shaft, normal use of a bearing on a shaft is influenced, equipment is stopped, and great economic loss is caused, the mechanical sealing device is suitable for multi-working-condition vacuum equipment.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides an adapt to multiplex condition vacuum apparatus mechanical seal device, includes transmission shaft and cover and establishes epaxial axle sleeve and bearing of transmission, the bearing sets up the one end of axle sleeve, the cover is equipped with the seal receptacle on the axle sleeve, the axle sleeve with be equipped with first sealed chamber between the seal receptacle, still the cover is equipped with the manger plate subassembly on the axle sleeve, the manger plate subassembly sets up first sealed chamber with between the bearing.
The invention relates to a mechanical sealing device for vacuum equipment suitable for multiple working conditions, wherein a transmission shaft is used for driving a working element in the equipment to move, a sealing seat is used for being fixed with an equipment port, the sealing seat and a shaft sleeve are in dynamic and static matching to form sealing for an equipment inner cavity, a first sealing cavity is arranged between the sealing seat and the shaft sleeve, cooling liquid is introduced into the first sealing cavity to realize cooling of each friction surface of the mechanical sealing, a water blocking component is arranged on the shaft sleeve, and the cooling liquid in the first sealing cavity can fall along the gravity direction after encountering the obstruction of the water blocking component after leaking through the friction surface, so that the cooling liquid can not reach a bearing along the outer wall of the shaft sleeve, the protection effect on the bearing is realized, and the normal operation of the mechanical sealing is ensured.
As a preferable scheme of the present invention, two sealing assemblies are disposed between the sealing seat and the shaft sleeve, one end of each sealing assembly is connected to the shaft sleeve, the other end of each sealing assembly is connected to the sealing seat, and the shaft sleeve, the sealing seat and the two sealing assemblies enclose to form the first sealing cavity.
As a preferable scheme of the invention, the sealing assembly comprises a movable sealing ring, a static sealing ring and a spring, the movable sealing ring is fixedly connected with the shaft sleeve, one end of the spring is connected with the sealing seat, the other end of the spring is connected with the static sealing ring, and the spring pushes the static sealing ring to abut against the movable sealing ring. Spring one end is installed in spacing recess on the seal receptacle, and the other end and quiet sealing ring fixed connection rotate the in-process at the transmission shaft, and the spring can not rotate along with the transmission shaft, avoids the spring to appear the condition of inefficacy owing to receive too big centrifugal force in equipment high-speed operation, ensures that the spring can provide the compensation for quiet sealing ring to improve mechanical seal's reliability.
As a preferable scheme of the invention, the sealing device further comprises a sealing body, one end of the sealing body is sleeved on the sealing seat, and the other end of the sealing body is sleeved on the bearing, so that the sealing body, the sealing seat, the shaft sleeve and the bearing are enclosed to form a second sealing cavity. The sealing bodies are sleeved on the sealing seat and the bearing, and all parts of the mechanical seal are protected through the sealing bodies, so that the service life of the mechanical seal is prolonged.
As a preferable aspect of the present invention, a retainer ring is provided on the seal body, and the retainer ring is provided between the bearing and the first seal cavity. Because the equipment fortune in-process, the axle sleeve is in high-speed rotating state, and the condition that splashes can appear in the coolant liquid of revealing on the axle sleeve sets up and keeps off the ring between bearing and first seal chamber, blocks the coolant liquid that splashes.
As a preferable scheme of the present invention, a leakage liquid outlet is provided on the sealing body, and the leakage liquid outlet is communicated with the second sealing cavity. Through set up on the seal and reveal the liquid export, discharge the coolant liquid of revealing along the axle sleeve outside the second seal chamber, avoid the coolant liquid of revealing to gather in the second seal chamber.
As a preferable aspect of the present invention, the sealing body is provided with a plurality of fluid passages, and each of the fluid passages penetrates through the sealing seat and communicates with the first sealing cavity. Through setting up a plurality of fluid passage can be convenient for let in the coolant liquid to first sealed intracavity simultaneously from a plurality of directions, make refrigerated effect better.
As a preferable aspect of the present invention, a plurality of the fluid passages are uniformly arranged in a circumferential direction of the sealing body. The cooling liquid is uniformly introduced into the first sealing cavity, so that the cooling is more sufficient and rapid.
As a preferable scheme of the present invention, the water blocking assembly includes a baffle plate and a circlip, and the baffle plate and the circlip are stacked along a length direction of the shaft sleeve. The elastic retainer ring can close the gap between the baffle and the shaft sleeve, and the possibility that the cooling liquid leaks through the baffle is reduced.
As a preferable scheme of the invention, the shaft sleeve is provided with an annular groove, and the elastic retainer ring is arranged in the annular groove.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the mechanical sealing device suitable for the multi-working-condition vacuum equipment, the water baffle is arranged on the shaft sleeve to change the flow direction of the cooling liquid leaked along the outer wall of the shaft sleeve, so that the cooling liquid cannot reach the bearing along the outer wall of the shaft sleeve, the bearing is protected, and the normal operation of mechanical sealing is ensured;
2. the static seal assembly consists of a spring and a static seal ring, and the static seal ring assembly is arranged on the seal seat and cannot rotate along with the transmission shaft, so that the condition that the spring fails in high-speed operation of equipment is avoided, the spring can be ensured to provide compensation for the static seal ring, and the reliability of mechanical seal is improved;
3. an elastic sealing ring is arranged on one side of the water baffle, so that the gap between the water baffle shaft sleeves is prevented from being closed, and the possibility that the cooling liquid leaks through the baffle is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a mechanical sealing device for vacuum equipment adapted to multiple working conditions according to the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is an enlarged view of the water deflector assembly of FIG. 2;
FIG. 4 is an enlarged view of the seal assembly of FIG. 2;
the labels in the figure are: 1-a transmission shaft, 2-a shaft sleeve, 21-a first seal cavity, 22-a seal assembly, 221-a movable seal ring, 222-a static seal ring, 223-a spring, 23-an annular groove, 3-a bearing, 4-a seal seat, 41-a limiting groove, 5-a water retaining assembly, 51-a baffle, 52-an elastic retainer ring, 6-a seal body, 61-a second seal cavity, 62-a baffle ring, 63-a leakage liquid outlet, 64-a fluid channel, 641-a first channel and 642-a second channel.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1-4, the mechanical sealing device suitable for the multi-working-condition vacuum equipment comprises a transmission shaft 1, and a shaft sleeve 2 and a bearing 3 which are sleeved on the transmission shaft 1, wherein the bearing 3 is arranged at one end of the shaft sleeve 2, a sealing seat 4 is sleeved on the shaft sleeve 2, a first sealing cavity 21 is arranged between the shaft sleeve 2 and the sealing seat 4, a water retaining assembly 5 is further sleeved on the shaft sleeve 2, and the water retaining assembly 5 is arranged between the first sealing cavity 21 and the bearing 3.
Specifically, the first seal cavity 21 is provided, two seal assemblies 22 are arranged between the seal holder 4 and the shaft sleeve 2, one end of each seal assembly 22 is connected with the shaft sleeve 2, the other end of each seal assembly 22 is connected with the seal holder 4, so that the shaft sleeve 2, the seal holder 4 and the two seal assemblies 22 are enclosed to form the first seal cavity 21, wherein each seal assembly 22 comprises a movable seal ring 221, a static seal ring 222 and a spring 223, the movable seal ring 221 is fixedly connected with the shaft sleeve 2, one end of the spring 223 is connected with the seal holder 4, the other end of the spring 223 is connected with the static seal ring 222, the spring 223 pushes the static seal ring 222 to abut against the movable seal ring 221, one end of the spring 223 is installed in the limiting groove 41 on the seal holder 4, the other end of the spring 223 is fixedly connected with the static seal ring 222, and the spring 223 cannot rotate together with the transmission shaft, the situation that the spring 223 fails due to the fact that the spring is subjected to excessive centrifugal force during high-speed operation of the device is avoided, and the fact that the spring 223 can provide compensation for the static sealing ring 222 is guaranteed, so that the reliability of mechanical sealing is improved.
The specific water retaining assembly 5 comprises a baffle 51 and a circlip 52, wherein the baffle 51 and the circlip 52 are arranged in a stacked mode in the length direction of the shaft sleeve 2, the baffle 51 is of an annular structure, the baffle 51 and the shaft sleeve 2 are in interference fit, the circlip 52 can close a gap between the baffle 51 and the shaft sleeve 2, the possibility that cooling liquid leaks through the baffle 51 is reduced, an annular groove 23 is formed in the shaft sleeve 2, and the circlip 52 is arranged in the annular groove 23.
Further, still include the seal 6, 6 pot heads of seal are established on the seal receptacle 4, and another pot head is established on the bearing 3, make seal 6, seal receptacle 4, axle sleeve 2 and bearing 3 enclose to close and form second sealed chamber 61, overlap on seal receptacle 4 and bearing 3 and establish seal 6, form the protection to each part of mechanical seal through seal 6, improve mechanical seal's life.
Specifically, the sealing body 6 is provided with a leakage liquid outlet 62, the leakage liquid outlet 62 is communicated with the second sealing cavity 61, and the leakage liquid outlet 62 is arranged on the sealing body 6, so that the cooling liquid leaked along the shaft sleeve 2 is discharged out of the second sealing cavity 61, and the leaked cooling liquid is prevented from accumulating in the second sealing cavity 61; the sealing body 6 is provided with a plurality of fluid channels 64, each fluid channel 64 penetrates through the sealing seat 4 and is communicated with the first sealing cavity 21, the plurality of fluid channels 64 can facilitate the introduction of cooling liquid into the first sealing cavity 21 from a plurality of directions at the same time, so that the cooling effect is better, wherein the fluid channels 64 comprise a first channel 641 arranged on the sealing body 6 and a second channel 642 arranged on the sealing seat 4, and the first channel 641 is communicated with the second channel 642. Furthermore, the plurality of fluid channels 64 are uniformly arranged along the circumferential direction of the sealing body 6, so that the cooling liquid can be uniformly introduced into the first sealing cavity 21, and the cooling is more sufficient and rapid. Furthermore, a baffle ring 62 is arranged on the sealing body 6 towards the second sealing cavity 21, the baffle ring 62 is arranged between the bearing 3 and the first sealing cavity 61, and because the shaft sleeve 2 is in a high-speed rotating state in the equipment transportation process, leaked cooling liquid on the shaft sleeve 2 can splash, and the baffle ring 62 is arranged between the bearing 3 and the first sealing cavity 21 to block the splashed cooling liquid.
In summary, according to the mechanical sealing device applicable to the multi-operating-condition vacuum equipment, the transmission shaft 3 is used for driving a working element in the equipment to move, the sealing seat 4 is used for being fixed with an equipment port, the sealing seat 4 and the shaft sleeve 2 are in dynamic and static matching to seal an inner cavity of the equipment, the first sealing cavity 21 is arranged between the sealing seat 4 and the shaft sleeve 2, cooling liquid is introduced into the first sealing cavity 21 to cool each friction surface of the mechanical seal, the water blocking component 5 is arranged on the shaft sleeve 2, and after the cooling liquid in the first sealing cavity 21 leaks through the friction surface and meets the obstruction of the water blocking component 5, the cooling liquid can fall along the gravity direction, so that the cooling liquid can not reach the bearing 3 along the outer wall of the shaft sleeve 2, the bearing 3 is protected, and the normal operation of the mechanical seal is ensured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides an adapt to multiplex condition vacuum apparatus mechanical seal device, its characterized in that includes transmission shaft (1) and cover and establishes axle sleeve (2) and bearing (3) on transmission shaft (1), bearing (3) set up the one end of axle sleeve (2), the cover is equipped with seal receptacle (4) on axle sleeve (2), axle sleeve (2) with be equipped with first sealed chamber (21) between seal receptacle (4), still the cover is equipped with manger plate subassembly (5) on axle sleeve (2), manger plate subassembly (5) set up first sealed chamber (21) with between bearing (3).
2. The mechanical sealing device for the multi-working-condition-adaptive vacuum equipment is characterized in that two sealing assemblies (22) are arranged between the sealing seat (4) and the shaft sleeve (2), one end of each sealing assembly (22) is connected with the shaft sleeve (2), the other end of each sealing assembly (22) is connected with the sealing seat (4), and the shaft sleeve (2), the sealing seat (4) and the two sealing assemblies (22) are enclosed to form the first sealing cavity (21).
3. The mechanical sealing device suitable for the multi-working-condition vacuum equipment is characterized in that the sealing assembly (22) comprises a movable sealing ring (221), a static sealing ring (222) and a spring (223), the movable sealing ring (221) is fixedly connected with the shaft sleeve (1), one end of the spring (223) is connected with the sealing seat (4), the other end of the spring is connected with the static sealing ring (222), and the spring (223) pushes the static sealing ring (222) to abut against the movable sealing ring (221).
4. The mechanical sealing device suitable for the multi-working-condition vacuum equipment as claimed in claim 1, further comprising a sealing body (6), wherein one end of the sealing body (6) is sleeved on the sealing seat (4), and the other end of the sealing body (6) is sleeved on the bearing (3), so that the sealing body (6), the sealing seat (4), the shaft sleeve (2) and the bearing (3) are enclosed to form a second sealing cavity (61).
5. A mechanical sealing device adapted to a multi-condition vacuum apparatus according to claim 4, wherein a baffle ring (62) is arranged on the sealing body (6), and the baffle ring (62) is arranged between the bearing (3) and the first sealing cavity (21).
6. The mechanical sealing device for the multi-working-condition-adaptive vacuum equipment is characterized in that a leakage liquid outlet (63) is formed in the sealing body (6), and the leakage liquid outlet (63) is communicated with the second sealing cavity (61).
7. The mechanical sealing device for the multi-working-condition-adaptive vacuum equipment as claimed in claim 6, wherein a plurality of fluid channels (64) are arranged on the sealing body (6), and each fluid channel (64) penetrates through the sealing seat (4) and is communicated with the first sealing cavity (21).
8. The mechanical sealing device for the multi-working-condition-adaptive vacuum equipment as claimed in claim 7, wherein a plurality of the fluid channels (64) are uniformly arranged along the circumferential direction of the sealing body (6).
9. The mechanical sealing device for the multi-working-condition-adaptive vacuum equipment according to any one of claims 1-8, wherein the water baffle assembly (5) comprises a baffle plate (51) and a circlip (52), and the baffle plate (51) and the circlip (52) are arranged in a stacked mode along the length direction of the shaft sleeve (2).
10. The mechanical sealing device for the multi-working-condition-adaptive vacuum equipment is characterized in that an annular groove (23) is formed in the shaft sleeve (2), and the elastic check ring (52) is arranged in the annular groove (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010182221.0A CN111271456A (en) | 2020-03-16 | 2020-03-16 | Mechanical sealing device suitable for multi-working-condition vacuum equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010182221.0A CN111271456A (en) | 2020-03-16 | 2020-03-16 | Mechanical sealing device suitable for multi-working-condition vacuum equipment |
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| Publication Number | Publication Date |
|---|---|
| CN111271456A true CN111271456A (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010182221.0A Pending CN111271456A (en) | 2020-03-16 | 2020-03-16 | Mechanical sealing device suitable for multi-working-condition vacuum equipment |
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| CN (1) | CN111271456A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111701523A (en) * | 2020-06-28 | 2020-09-25 | 中国兵器装备集团自动化研究所 | Kneading safety transmission device |
-
2020
- 2020-03-16 CN CN202010182221.0A patent/CN111271456A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111701523A (en) * | 2020-06-28 | 2020-09-25 | 中国兵器装备集团自动化研究所 | Kneading safety transmission device |
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