CN204386874U - Tandem type two-stage mechanical seal device - Google Patents
Tandem type two-stage mechanical seal device Download PDFInfo
- Publication number
- CN204386874U CN204386874U CN201420783213.1U CN201420783213U CN204386874U CN 204386874 U CN204386874 U CN 204386874U CN 201420783213 U CN201420783213 U CN 201420783213U CN 204386874 U CN204386874 U CN 204386874U
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- mechanical seal
- inlet means
- chamber
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- sealing
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Abstract
A kind of tandem type two-stage mechanical seal device, one-level mechanical seal, secondary mechanical sealing is arranged in inlet means, transmission shaft is through one-level mechanical seal, secondary mechanical seals, UNICOM's chamber is had between one-level mechanical seal and secondary mechanical seal, snout cavity is had in inlet means, snout cavity and UNICOM's chamber are by secondary mechanical seal isolation, on inlet means corresponding snout cavity left port on dropping valve is installed, decompression tube is installed in the outer end of dropping valve, decompression tube communicates with UNICOM chamber, on inlet means, there is import at corresponding snout cavity place, transmission shaft is connected with the rotor of power plant and screw pump, the bottom of power plant is connected with the top of inlet means, the bottom of inlet means is connected with the stator of screw pump, in the top of inlet means, corresponding discharge chamber place has linked hole, one-level mechanical seal, secondary mechanical is sealed into mechanical seal, the pressure making every grade of sealing bear under the effect of dropping valve declines greatly, sealing can be improved, increase the service life.
Description
Technical field
The utility model relates to a kind of mechanical seal device, is a kind of tandem type two-stage mechanical seal device.
Background technique
Current mechanical seal is all single step arrangement, and the mechanical seal device of this single-stage exists poorly sealed when bearing high pressure, the problem that working life is short, and need frequently to change, when causing equipment to run, rate is low, and maintenance workload is large, and the management difficulty of equipment, cost is high.Because existing single-stage mechanical seal is short for working life, so, be not suitable for working in high temperature, hyperbaric environment, be more not suitable for working in hazardous medium.Therefore, generally all select stuffing type sealing device at the seal arrangement of high temperature, hyperbaric environment and hazardous medium environment, and stuffing type sealing device needs often to add filler, maintenance workload is large, and material consumption is many.
Summary of the invention
The purpose of this utility model is a kind of tandem type two-stage mechanical seal device of design, improves sealing, increases working life, and rate when improving the operation of equipment, reduces maintenance workload.
The purpose of this utility model is achieved in that and comprises power plant, one-level mechanical seal, secondary mechanical seals, decompression tube, dropping valve, transmission shaft, inlet means, screw pump, one-level mechanical seal, secondary mechanical is sealed into mechanical seal, one-level mechanical seal, secondary mechanical sealing is arranged in inlet means, transmission shaft is through one-level mechanical seal, secondary mechanical seals, UNICOM's chamber is had between one-level mechanical seal and secondary mechanical seal, snout cavity is also had in inlet means, snout cavity and UNICOM's chamber are by secondary mechanical seal isolation, on inlet means corresponding snout cavity left port on dropping valve is installed, decompression tube is installed in the outer end of dropping valve, decompression tube communicates with UNICOM chamber, on inlet means, there is import at corresponding snout cavity place, the upper end of transmission shaft penetrates in power plant, the lower end of transmission shaft is connected with the rotor of screw pump, the bottom of power plant is connected with the top of inlet means, the bottom of inlet means is connected with the stator of screw pump, discharge chamber is had in the top of inlet means, corresponding discharge chamber place has linked hole, linked hole makes discharge chamber communicate with air, one-level mechanical seal, secondary mechanical is sealed into mechanical seal.
The beneficial effects of the utility model are: respectively bear the pressure of half in the effect next stage mechanical seal of dropping valve, secondary mechanical sealing, the pressure that every grade of sealing is born declines greatly, be adapted at working in high temperature, hyperbaric environment, also be adapted at working in hazardous medium, can sealing be improved, increase the service life, reduce equipment control difficulty, reduce cost of production, there is significant economic benefit.
Accompanying drawing explanation
Fig. 1 is erection drawing of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises power plant 1, one-level mechanical seal 4, secondary mechanical sealing 6, decompression tube 7, dropping valve 8, transmission shaft 10, inlet means 11, screw pump 12, one-level mechanical seal 4, secondary mechanical sealing 6 is mechanical seal, one-level mechanical seal 4, secondary mechanical sealing 6 is arranged on inlet means 11 li, transmission shaft 10 is through one-level mechanical seal 4, secondary mechanical sealing 6, one-level mechanical seal 4 and secondary mechanical have UNICOM's chamber 5 between sealing 6, snout cavity 9 is also had in inlet means 11, snout cavity 9 and UNICOM's chamber 5 are sealed 6 by secondary mechanical isolates, on inlet means 11 corresponding snout cavity 9 left port on dropping valve 8 is installed, decompression tube 7 is installed in the outer end of dropping valve 8, decompression tube 7 communicates with UNICOM chamber 5, on inlet means 11, there is import 13 at corresponding snout cavity 9 place, the upper end of transmission shaft 10 penetrates 1 li, power plant, power plant 1 can drive transmission shaft 10 to rotate, the lower end of transmission shaft 10 is connected with the rotor of screw pump 12, the bottom of power plant 1 is connected with the top of inlet means 11, the bottom of inlet means 11 is connected with the stator of screw pump 12, discharge chamber 2 is had in the top of inlet means 11, corresponding discharge chamber 2 place has linked hole 3, linked hole 3 makes discharge chamber 2 and air, one-level mechanical seal 4, secondary mechanical sealing 6 is mechanical seal.
The half of the pressure at import 13 place can be adjusted at the pressure of the effect second line of a couplet cavity room 5 of dropping valve, secondary mechanical sealing 6 is made to bear the pressure of half, another part pressure is held by one-level mechanical seal 4, linked hole 3 makes discharge chamber 2 communicate with air, can ensure that the pressure of UNICOM's chamber 5 is setting pressure.
During use, pressurized fluid is drained from the import 13 of inlet means 11 by screw pump 12 supercharging, and pressurized fluid can not drain to the outside of inlet means 11 under the effect of one-level mechanical seal 4, secondary mechanical sealing 6.
Power plant 1 can arrange reducing gear according to the requirement of screw pump 12.
Screw pump in the utility model also can be the pump class of the rotary works such as centrifugal pump.
The utility model also can be connected the mechanical seal of more than three grades, makes it adapt to higher sealed environment.
Claims (1)
1. a tandem type two-stage mechanical seal device, comprise power plant (1), one-level mechanical seal (4), secondary mechanical sealing (6), decompression tube (7), dropping valve (8), transmission shaft (10), inlet means (11), screw pump (12), one-level mechanical seal (4), secondary mechanical sealing (6) is mechanical seal, it is characterized in that: one-level mechanical seal (4), it is inner that secondary mechanical sealing (6) is arranged on inlet means (11), transmission shaft (10) is through one-level mechanical seal (4), secondary mechanical sealing (6), one-level mechanical seal (4) and secondary mechanical seal between (6) UNICOM's chamber (5), snout cavity (9) is also had in inlet means (11), snout cavity (9) and UNICOM's chamber (5) are sealed (6) by secondary mechanical isolates, the left port of the upper corresponding snout cavity (9) of inlet means (11) installs dropping valve (8), decompression tube (7) is installed in the outer end of dropping valve (8), decompression tube (7) communicates with UNICOM's chamber (5), at inlet means (11), there is import (13) at upper corresponding snout cavity (9) place, it is inner that the upper end of transmission shaft (10) penetrates power plant (1), the lower end of transmission shaft (10) is connected with the rotor of screw pump (12), the bottom of power plant (1) is connected with the top of inlet means (11), the bottom of inlet means (11) is connected with the stator of screw pump (12), discharge chamber (2) is had in the top of inlet means (11), corresponding discharge chamber (2) place has linked hole (3), linked hole (3) makes discharge chamber (2) communicate with air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420783213.1U CN204386874U (en) | 2014-12-14 | 2014-12-14 | Tandem type two-stage mechanical seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420783213.1U CN204386874U (en) | 2014-12-14 | 2014-12-14 | Tandem type two-stage mechanical seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204386874U true CN204386874U (en) | 2015-06-10 |
Family
ID=53359600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420783213.1U Active CN204386874U (en) | 2014-12-14 | 2014-12-14 | Tandem type two-stage mechanical seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204386874U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454522A (en) * | 2014-12-14 | 2015-03-25 | 张成功 | Tandem type two-stage mechanical seal device |
-
2014
- 2014-12-14 CN CN201420783213.1U patent/CN204386874U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454522A (en) * | 2014-12-14 | 2015-03-25 | 张成功 | Tandem type two-stage mechanical seal device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |