CN209385658U - A kind of dry-type encapsulated device for twin-screw dry powder pump - Google Patents
A kind of dry-type encapsulated device for twin-screw dry powder pump Download PDFInfo
- Publication number
- CN209385658U CN209385658U CN201821780543.XU CN201821780543U CN209385658U CN 209385658 U CN209385658 U CN 209385658U CN 201821780543 U CN201821780543 U CN 201821780543U CN 209385658 U CN209385658 U CN 209385658U
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- dry powder
- dry
- twin
- airflow channel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Sealing Devices (AREA)
Abstract
The utility model provides a kind of dry-type encapsulated device for twin-screw dry powder pump, comprising: sealing ring, gas supply assembly；Seal ring set is set on pump shaft, and is set in the seal chamber formed between pump shaft and gland, and sealing ring is abutted with step；The inside of sealing ring is equipped with groove；Sealing ring is additionally provided with the first airflow channel, and the outlet of the first airflow channel is located at the medial surface of sealing ring, and the entrance of the first airflow channel is located at the trailing flank of sealing ring, connection between the outlet and entrance of the first airflow channel；Gas supply assembly includes the sealing flange of pipe fitting, fixed pipe fitting；Gas supply assembly provides origin for the first airflow channel, so that generating stable air cushion rotation between sealing ring and pump shaft, it can prevent the leakage of dry powder, it can be reduced the friction between sealing ring and pump shaft again, to reduce the pollution of powder that seal wears are fallen down to dry powder medium, the service life for improving sealing device reduces the frequency of replacement and disassembly, decreases the risk of pump shaft fracture.
Description
Technical field
The utility model relates to a kind of dry-type encapsulated devices for twin-screw dry powder pump.
Background technique
It introduces external long axis twin-screw dry powder pump first wife and seals the reasons in structure special because of twin-screw, to sealing indwelling
Space is limited, and product uses always packing seal from after research and development listing.
In use, packing seal is under dry powder operating condition, because without lubrication and heat dissipation, caused by serious wear, because
This service life is very short, averagely only 30-40 hours continuous work ability；The consequence of generation is exactly a large amount of dust pollution, regular
Dismounting and change, and then lead to that equipment precision declines or even screw rod breaking axis frequently occurs.Pole is caused to the production of client
Big difficulty and artificial, property waste, and huge environmental protection pressure is brought simultaneously.
Therefore, in the case where not changing any seal cavity size of former long axis twin-screw dry powder pump, how one kind is provided
Dry-type encapsulated device with long service life for twin-screw dry powder pump becomes industry problem to be solved.
Summary of the invention
In view of the shortcomings of the prior art, the purpose of the utility model is to provide a kind of dry type for twin-screw dry powder pump is close
Seal apparatus prevents the leakage of dry powder, structure is simple, has inclined by generating stable air cushion rotation between sealing ring and pump shaft
Space is put, not easy to break and abrasion, seal life is long, reduces the frequency of replacement and disassembly, decreases pump shaft
The risk of fracture.
To achieve the goals above, the utility model provides a kind of dry-type encapsulated device for twin-screw dry powder pump,
Twin-screw dry powder pump includes gland, and gland is set on pump shaft, and seal chamber is formed between gland and pump shaft；The inside of gland is equipped with
One step；The dry-type mechanical sealing device of the utility model includes: sealing ring, gas supply assembly；
Seal ring set is set on pump shaft, and is set in seal chamber, and sealing ring is abutted with step；The inside of sealing ring is equipped with
Groove；Sealing ring is additionally provided with the first airflow channel, and the outlet of the first airflow channel is located at the medial surface of sealing ring, and the first air-flow is logical
The entrance in road is located at the trailing flank of sealing ring, connection between the outlet and entrance of the first airflow channel；
Gas supply assembly includes the sealing flange of pipe fitting, fixed pipe fitting；Sealing flange is fixed on the rear side of gland, sealing
The second airflow channel, front side of second airflow channel by pipe fitting connection to sealing flange, the second airflow channel are equipped in flange
The entrance of corresponding first airflow channel.
In the utility model, by being passed through gas between sealing ring and pump shaft, so that being generated between sealing ring and pump shaft
Stable air cushion rotation, can prevent the friction between the leakage and sealing ring and pump shaft of dry powder, to reduce sealing
Ring wear away under pollution of the powder to dry powder medium, improve the service life of sealing device, reduce replacement and disassembly
Frequency decreases the risk of pump shaft fracture.
In the utility model, by the first airflow channel and groove, air-flow is passed through the gap between sealing ring and pump shaft,
So that generating stable air cushion rotation between sealing ring and pump shaft.Its structure is simple, meanwhile, air-flow can also will disperse to seal chamber
Medium powder be blown in media Containers again, further prevent the leakage of medium.
According to another specific embodiment of the utility model, groove is spiral groove, the rotation direction phase of spiral groove and pump shaft
It adapts to.
According to another specific embodiment of the utility model, spiral groove is arranged reasonable recessed according to the pressure of side medium
Groove depth.
According to another specific embodiment of the utility model, the outlet of the first airflow channel is located at the centre of spiral groove
Section.
According to another specific embodiment of the utility model, pipe fitting connects gas source, the pipeline between pipe fitting and gas source
On, it is equipped with pressure gauge, pressure-control valve, one way stop peturn valve.Convenient for rationally controlling the confession of sealing device according to the pressure of side medium
Atmospheric pressure realizes sealing convenient for generating stable air cushion rotation.
According to another specific embodiment of the utility model, gas source is inert gas, avoid with the dry powder of side medium or
Gas generates chemical reaction.
According to another specific embodiment of the utility model, the supply gas pressure that gas supply assembly provides is greater than medium lateral pressure 1-
2kg/cm2.Convenient for generating stable air cushion rotation, sealing is realized.
According to another specific embodiment of the utility model, in seal chamber, in the outer surface of pump shaft, it is coated with hard conjunction
Gold makes it have self-lubricating capacities, and chemical stability is strong, and thermal stability is high, is not easy that wear particle can be generated in sharp wear
Or adhesion.
According to another specific embodiment of the utility model, sealing ring is abutted with sealing flange, sealing ring and sealing flange
Between be equipped with stop pin, prevent sealing ring and sealing flange from generating displacement, it is ensured that the first airflow channel and the second airflow channel it
Between connection.
Compared with prior art, the utility model have it is following the utility model has the advantages that
The utility model between sealing ring and pump shaft by being passed through gas, so that generating stabilization between sealing ring and pump shaft
Air cushion rotation, the friction between the leakage and sealing ring and pump shaft of dry powder can be prevented, thus reduce sealing ring mill
Pollution of the powder fallen down to dry powder medium is damaged, the service life of sealing device is improved, reduces the frequency of replacement and disassembly,
Decrease the risk of pump shaft fracture.
The sealing device structure of the utility model is simple, and air-flow can also blow again the medium powder to disperse to seal chamber
To media Containers, the leakage of medium is further prevented.
Air-flow is passed through by the utility model by the way that the spiral groove adaptable with the rotation direction of pump shaft is arranged on the inside of sealing ring
Gap between sealing ring and pump shaft so that generate stable air cushion rotation between sealing ring and pump shaft, meanwhile, rotation direction it is identical,
Both it can guarantee the unobstructed of air cushion rotation and stablized, moreover it is possible to ensure being bonded between sealing ring and pump shaft when low pressure.
The utility model is described in further detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the dry-type encapsulated device for twin-screw dry powder pump of embodiment 1；
Fig. 2 is another schematic diagram of the dry-type encapsulated device for twin-screw dry powder pump of embodiment 1.
Specific embodiment
Embodiment 1
A kind of dry-type encapsulated device for twin-screw dry powder pump is present embodiments provided, as shown in Figs. 1-2, twin-screw is dry
Powder pump is equipped with gland 101, and 101 sets of gland on pump shaft 102, form seal chamber between gland 101 and pump shaft 102.Gland 101
Inside is equipped with a step.
Dry-type mechanical sealing device provided in this embodiment includes: sealing ring 201, gas supply assembly.For replacing existing skill
Packing seal in art.In the present embodiment, sealing ring 201 realizes sealing for being set in seal chamber, is existed by gas supply assembly
It is passed through gas between sealing ring 201 and pump shaft 102, so that stable air cushion rotation is generated between sealing ring 201 and pump shaft 102, from
And prevent the leakage of dry powder.
Specifically, sealing ring 201 is sheathed on pump shaft 102, and the seal chamber being set between gland 101 and pump shaft 102
Interior, sealing ring 201 is abutted with the step of 101 inside of gland.The inside of sealing ring 201 is equipped with several grooves 202, exists convenient for gas
Stable air cushion rotation is generated between sealing ring 201 and pump shaft 102, prevents dry powder from leaking to make air cushion be screwed with enough pressure, it is recessed
Slot 202 is arranged a plurality of.Further, groove 202 is spiral groove 202, and spiral groove 202 and the rotation direction of pump shaft 102 are adapted,
So that can adapt to the sealing under different gap size between sealing ring 201 and pump shaft 102.Spiral groove 202 is according to side medium
Pressure, reasonable 202 depth of groove is set.
Sealing ring 201 is equipped with the first airflow channel 203, for being passed through gas between sealing ring 201 and pump shaft 102, the
The outlet of one airflow channel 203 is located at the medial surface of sealing ring 201, and the entrance of the first airflow channel 203 is located at sealing ring 201
Trailing flank, connection between the outlet and entrance of the first airflow channel 203.The outlet of first airflow channel 203 is located at spiral groove
202 interlude.
Gas supply assembly includes the sealing flange 301 of pipe fitting 302, fixed pipe fitting 302；Sealing flange 301 is fixed on pressure
The rear side of lid 101, is equipped with the second airflow channel 303 in sealing flange 301, the second airflow channel 303 by 302 connection of pipe fitting extremely
The front side of sealing flange 301, the entrance of corresponding first airflow channel 203 of the second airflow channel 303.Sealing ring 201 and Sealing Method
Orchid 301 abuts, and stop pin 4 is equipped between sealing ring 201 and sealing flange 301, prevents sealing ring 201 and sealing flange 301 from producing
Raw displacement, it is ensured that the connection between the first airflow channel 203 and the second airflow channel 303.Sealing flange 301 and gland 101 it
Between, it is fixedly connected by gasket 4 with screw thread 5.
Pipe fitting 302 connects gas source, on the pipeline between pipe fitting 302 and gas source, be equipped with pressure gauge, pressure-control valve,
One way stop peturn valve.Convenient for rationally controlling the supply gas pressure of sealing device according to the pressure of side medium, convenient for generating stable air cushion
Sealing is realized in rotation.
To avoid generating chemical reaction with the dry powder of side medium or gas, gas source is inert gas.
The supply gas pressure that gas supply assembly provides is greater than medium lateral pressure 1-2kg/cm2.It is real convenient for generating stable air cushion rotation
Now seal.
In seal chamber, in the outer surface of pump shaft 102, it is coated with hard alloy, makes it have self-lubricating capacities, chemical stabilization
Property it is strong, thermal stability is high, is not easy that wear particle or adhesion can be generated in sharp wear.
The air-flow that gas supply assembly introduces is passed through sealing ring by the first airflow channel 203 and groove 202 by the present embodiment
Gap between 201 and pump shaft 102, so that stable air cushion rotation is generated between sealing ring 201 and pump shaft 102, to prevent powder
Material leakage.The sealing of air cushion rotation simultaneously also can be reduced the friction between sealing ring 201 and pump shaft 102, to reduce the mill of sealing ring 201
Pollution of the powder fallen down to dry powder medium is damaged, the service life of sealing device is improved, the frequency of replacement and disassembly is reduced, also subtracts
The risk that few pump shaft 102 is broken.The present embodiment structure is simple, and air-flow can also blow again the medium powder to disperse to seal chamber
To media Containers, the leakage of medium is further prevented.
Although the utility model is disclosed above in the preferred embodiment, it is not intended to limit the utility model the model of implementation
It encloses.Any those skilled in the art improve in the invention scope for not departing from the utility model when can make a little,
I.e. all same improvement done according to the utility model, should be the scope of the utility model and are covered.
Claims (9)
1. a kind of dry-type encapsulated device for twin-screw dry powder pump, the twin-screw dry powder pump includes gland, the gland set
It is located on pump shaft, forms seal chamber between the gland and pump shaft, the inside of the gland is equipped with a step, which is characterized in that
The dry-type encapsulated device includes: sealing ring, gas supply assembly；
The seal ring set is set on pump shaft, and is set in the seal chamber, and the sealing ring is abutted with the step；It is described
The inside of sealing ring is equipped with groove；The sealing ring is additionally provided with the first airflow channel, and the outlet of first airflow channel is located at
The medial surface of the sealing ring, the entrance of first airflow channel are located at the trailing flank of the sealing ring, first air-flow
Connection between the outlet and entrance in channel；
The gas supply assembly includes the sealing flange of pipe fitting, the fixed pipe fitting；The sealing flange is fixed on the pressure
The rear side of lid, the sealing flange is interior to be equipped with the second airflow channel, and second airflow channel is by the pipe fitting connection to institute
The front side of sealing flange is stated, second airflow channel corresponds to the entrance of first airflow channel.
2. being used for the dry-type encapsulated device of twin-screw dry powder pump as described in claim 1, which is characterized in that the groove is spiral shell
The rotation direction of rotation groove, the spiral groove and pump shaft is adapted.
3. being used for the dry-type encapsulated device of twin-screw dry powder pump as claimed in claim 2, which is characterized in that the spiral groove
According to the pressure of side medium, reasonable depth of groove is set.
4. being used for the dry-type encapsulated device of twin-screw dry powder pump as claimed in claim 2, which is characterized in that first air-flow
The outlet in channel is located at the interlude of the spiral groove.
5. being used for the dry-type encapsulated device of twin-screw dry powder pump as described in claim 1, which is characterized in that the pipe fitting connects
It connects gas source, on the pipeline between the pipe fitting and gas source, is equipped with pressure gauge, pressure-control valve, one way stop peturn valve.
6. being used for the dry-type encapsulated device of twin-screw dry powder pump as claimed in claim 5, which is characterized in that the gas source is lazy
Property gas.
7. being used for the dry-type encapsulated device of twin-screw dry powder pump as described in claim 1, which is characterized in that the gas supply assembly
The supply gas pressure of offer is greater than medium lateral pressure 1-2kg/cm2。
8. being used for the dry-type encapsulated device of twin-screw dry powder pump as described in claim 1, which is characterized in that the seal chamber
It is interior, in the outer surface of pump shaft, it is coated with hard alloy and grinding and polishing.
9. as described in claim 1 be used for twin-screw dry powder pump dry-type encapsulated device, which is characterized in that the sealing ring with
The sealing flange abuts, and stop pin is equipped between the sealing ring and the sealing flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821780543.XU CN209385658U (en) | 2018-10-31 | 2018-10-31 | A kind of dry-type encapsulated device for twin-screw dry powder pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821780543.XU CN209385658U (en) | 2018-10-31 | 2018-10-31 | A kind of dry-type encapsulated device for twin-screw dry powder pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209385658U true CN209385658U (en) | 2019-09-13 |
Family
ID=67867420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821780543.XU Active CN209385658U (en) | 2018-10-31 | 2018-10-31 | A kind of dry-type encapsulated device for twin-screw dry powder pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209385658U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109237044A (en) * | 2018-10-31 | 2019-01-18 | 东莞市华汇精密机械有限公司 | A kind of dry-type encapsulated device for twin-screw dry powder pump |
-
2018
- 2018-10-31 CN CN201821780543.XU patent/CN209385658U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109237044A (en) * | 2018-10-31 | 2019-01-18 | 东莞市华汇精密机械有限公司 | A kind of dry-type encapsulated device for twin-screw dry powder pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209385658U (en) | A kind of dry-type encapsulated device for twin-screw dry powder pump | |
| CN203584878U (en) | Shaft seal structure of waste gas exhaust centrifugal fan | |
| CN203823072U (en) | Cartridge mechanical seal device | |
| CN105545795A (en) | Novel water cooling acid-resistant, alkali-resistant and high-temperature-resistant packaged type mechanical seal | |
| CN109237044A (en) | A kind of dry-type encapsulated device for twin-screw dry powder pump | |
| CN203703139U (en) | Sealing structure for rotary furnace | |
| CN202691101U (en) | Radius varying type pneumatic wear-resisting rocking valve | |
| CN103629357A (en) | Sealing mechanism for vane type rotary valve | |
| Davydov et al. | Problems with the use of Pneumatic screw pumps to transport bulk cargo | |
| CN205001515U (en) | Design has bearing seal of labyrinth seals structure | |
| CN201364017Y (en) | Charging and discharging combined sealing of soda incinerator | |
| CN209041565U (en) | A kind of dry-type mechanical sealing device of ultrahigh speed homogenizer | |
| CN209401233U (en) | A kind of self-operated type gas boosting regulating device | |
| CN103953574B (en) | The shaft seal structure of a kind of cryopump and axle are sealed gas control system | |
| CN207563233U (en) | Rotary screen | |
| CN208750013U (en) | A kind of high temperature and high pressure gas surface of revolution dynamic sealing device | |
| CN208203571U (en) | A kind of axle sealing structure for main unit of screw air compressor | |
| CN205700839U (en) | A kind of anti-overvoltage horizontal sand mill | |
| CN203730954U (en) | Ball mill feeding seal device | |
| CN107755023B (en) | A kind of Horizontal closed is without mechanical sealing medium Ball-stirring mill | |
| CN106090235B (en) | A kind of frame winch compressed air slewing equipment | |
| CN113137478A (en) | Zero-leakage combined shaft seal device for high-temperature and high-dust working condition | |
| CN204267776U (en) | A kind of coal powder metering rotary seal valve | |
| CN202864470U (en) | Material supply valve with good sealing performance | |
| CN219045474U (en) | Pneumatic flexible shaft end sealing device and smoke exhaust fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Room 1101, No. 11, 1st Road, Sanyong Industrial Park, Zhongtang Town, Dongguan City, Guangdong Province, 523507 Patentee after: Guangdong Huahui Intelligent Equipment Co.,Ltd. Address before: 523231 Chajiao Industrial Park, Zhongtang Town, Dongguan City, Guangdong Province Patentee before: DONGGUAN HUAHUI PRECISION MACHINERY CO.,LTD. |
|
| CP03 | Change of name, title or address |