CN211039680U - Double-end-face balanced mechanical seal for double-screw pump - Google Patents
Double-end-face balanced mechanical seal for double-screw pump Download PDFInfo
- Publication number
- CN211039680U CN211039680U CN201921813998.1U CN201921813998U CN211039680U CN 211039680 U CN211039680 U CN 211039680U CN 201921813998 U CN201921813998 U CN 201921813998U CN 211039680 U CN211039680 U CN 211039680U
- Authority
- CN
- China
- Prior art keywords
- ring
- sleeve
- shaft
- mechanical seal
- shaft sleeve
- 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
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
- Mechanical Sealing (AREA)
Abstract
The utility model provides a bi-polar face balanced type mechanical seal for two screw pump belongs to sealing member technical field, include: a rotating shaft; a shaft sleeve; the left rotating ring is fixed with the shaft sleeve through a first pin shaft, and the first pin shaft radially penetrates through the shaft sleeve and the left rotating ring; a stationary ring seat; a left spring axially arranged is arranged between the left stationary ring and the stationary ring seat; sealing the disc; a fastening ring; a right stationary ring; a transmission sleeve; a right spring axially arranged is arranged between the right rotating ring and the transmission sleeve; the spiral suction winding sleeve is sleeved outside the transmission sleeve and attached to the inner wall of the cooling cavity, the transmission sleeve and the shaft sleeve are fixed through the spiral suction winding sleeve through a fixing screw, the fixing screw is radially inserted into the spiral suction winding sleeve to penetrate through the transmission sleeve, a spiral groove is formed in the outer side wall of the spiral suction winding sleeve, and the spiral groove is communicated with the liquid inlet channel and the liquid outlet channel. The utility model has the advantage of better cooling effect.
Description
Technical Field
The utility model belongs to the technical field of the sealing member, a bi-polar face balanced type mechanical seal for double screw pump is related to.
Background
The mechanical seal is a device for preventing fluid leakage, which is formed by at least one pair of end faces perpendicular to the rotation axis, keeping fit and sliding relatively under the action of fluid pressure and the elasticity (or magnetic force) of a compensation mechanism and the cooperation of auxiliary seal, and is a shaft seal device of rotary machinery. The pressure unloading of the medium acting on the sealing end face in the mechanical seal is balanced.
For example, a chinese patent application No. 201620714793.8 discloses a double-end cartridge mechanical seal, which includes a shaft; the shaft sleeve is sleeved on the rotating shaft; the sealing disc is arranged on the shaft sleeve; the sealing assembly is arranged on the sealing disc and comprises a movable ring and a static ring, one end of the movable ring is attached to the static ring, the movable ring can rotate circumferentially relative to the static ring, and the other end of the movable ring is connected with the shaft sleeve; the elastic piece is uniformly arranged between the static ring seat and the sealing disc in a surrounding way, and is respectively connected with the static ring seat and the sealing disc; the transmission seat is arranged on the rotating shaft and located on one side of the shaft sleeve, a plurality of transmission screws are evenly arranged on the transmission seat in a surrounding mode, the transmission screws are inserted into the shaft sleeve, a transmission pin is further arranged on the transmission seat, and one end of the transmission pin penetrates through the transmission seat and is inserted into the moving ring.
According to the requirements of the working environment of the double-screw pump, namely that the medium is residual oil, the temperature is 130 ℃, the viscosity is 500-.
Disclosure of Invention
The utility model aims at having the above-mentioned problem to current technique, provided a better bi-polar face balanced type mechanical seal who is used for the double-screw pump of cooling effect.
The purpose of the utility model can be realized by the following technical proposal: a double-ended balanced mechanical seal for a twin screw pump comprising:
a rotating shaft;
the shaft sleeve is sleeved outside the rotating shaft;
the left rotating ring is sleeved outside the shaft sleeve and embedded into the left end part of the shaft sleeve, the left rotating ring is fixed with the shaft sleeve through a first pin shaft, and the first pin shaft radially penetrates through the shaft sleeve and the left rotating ring;
the static ring seat is sleeved outside the shaft sleeve and is positioned on the right side of the left dynamic ring;
the left stationary ring is embedded into the left side of the stationary ring seat and is abutted against the left movable ring, and a left spring is axially arranged between the left stationary ring and the stationary ring seat;
the sealing disc is sleeved outside the shaft sleeve and positioned on the right side of the static ring seat, the left side face of the sealing disc is attached to the static ring seat, a cooling cavity is formed along the left side of the sealing disc in a concave mode, and the sealing disc is provided with a liquid inlet channel and a liquid outlet channel which penetrate through the cooling cavity;
the fastening ring is sleeved at the right end of the shaft sleeve, the shaft sleeve and the rotating shaft are fixed by the fastening ring through a fastening screw, and the fastening screw is radially inserted into the fastening ring and penetrates through the shaft sleeve;
a right stationary ring embedded in the right side of the cooling cavity;
the transmission sleeve is embedded into the cooling cavity and is positioned on the left side of the right stationary ring;
the right movable ring is embedded into the left side of the transmission sleeve and is abutted against the right stationary ring, and a right spring which is axially arranged is arranged between the right movable ring and the transmission sleeve;
the spiral suction winding sleeve is sleeved outside the transmission sleeve and attached to the inner wall of the cooling cavity, the transmission sleeve and the shaft sleeve are fixed through the spiral suction winding sleeve through a fixing screw, the fixing screw is radially inserted into the spiral suction winding sleeve to penetrate through the transmission sleeve, a spiral groove is formed in the outer side wall of the spiral suction winding sleeve, and the spiral groove is communicated with the liquid inlet channel and the liquid outlet channel.
As a further improvement of the utility model, a push ring is arranged between the right spring and the right movable ring.
As a further improvement, be equipped with left dynamic seal circle between left side rotating ring and the axle sleeve, be equipped with left static seal circle between left quiet ring and the quiet ring seat, be equipped with right dynamic seal circle between push ring and the right rotating ring, be equipped with right static seal circle between right quiet ring and the sealed dish.
As a further improvement of the utility model, the shaft sleeve is externally embedded with a first snap ring, and the first snap ring is positioned in the cooling cavity and abutted against the left end face of the transmission sleeve.
As a further improvement, the shaft sleeve is externally embedded with a second snap ring, and the second snap ring is abutted against the right end face of the fastening ring.
As a further improvement, the inner wall of the transmission sleeve is embedded with a third snap ring, which is close to the right end face of the transmission sleeve and limits the right movable ring to be separated from the transmission sleeve right.
As the utility model discloses a further improvement still includes the locating piece, and locating piece one end links to each other with sealed dish, and the other end links firmly with the tight circle through mounting screw, and mounting screw radially passes the locating piece and inserts the tight circle.
As a further improvement, the positioning block one end outer convex is formed with the positioning protrusion, the sealing disc indent is formed with the positioning groove for the embedding of the positioning protrusion.
As the utility model discloses a further improvement, the axial cartridge has the second round pin axle between quiet ring seat and the quiet ring in a left side, and the axial cartridge has the third round pin axle between sealed dish and the quiet ring in the right side, and second round pin axle, third round pin axle restrict quiet ring in a left side, the quiet ring circumferential direction in the right side respectively.
As a further improvement of the utility model, the opening parts of the liquid inlet channel and the liquid outlet channel are respectively provided with the dustproof plugs in a detachable way.
Based on the technical scheme, the embodiment of the utility model provides a can produce following technological effect at least:
1. this mechanical seal is bi-polar face balanced type mechanical seal to the sealed effect is guaranteed to the high pressure difference environment of adaptation double screw pump, and this mechanical seal is the sectional type design, the dismouting of being convenient for. In addition, through setting up spiral suction and rolling up the cover for the coolant liquid is at the cooling chamber along helicla flute spiral flow, thereby fully contacts in order to take away more heats with mechanical seal, thereby improves the cooling effect, guarantees the sealed effect of this mechanical seal under high temperature environment.
2. Push away the ring through the setting and exert even effort with guaranteeing right spring to right rotating ring, and then guarantee the sealed effect between right rotating ring and the right quiet ring.
3. Through setting up first snap ring location installation drive sleeve to the mounted position and the decrement of location right spring guarantee the pretightning force of right rotating ring after the equipment is accomplished with right quiet ring.
Drawings
Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.
Fig. 2 is a partially enlarged view at B in fig. 1.
Fig. 3 is a partially enlarged view of a portion a in fig. 1.
In the figure, 100, the rotation axis;
200. a shaft sleeve; 210. a first snap ring; 220. a second snap ring;
300. a left rotating ring; 310. a first pin shaft; 320. a left movable sealing ring;
400. a stationary ring seat; 410. a left spring; 420. a second pin shaft;
500. a left stationary ring; 510. a left static seal ring;
600. sealing the disc; 610. a cooling chamber; 620. a liquid inlet channel; 630. a liquid outlet channel; 640. a positioning groove; 650. a third pin shaft; 660. a dust plug;
700. a fastening ring; 710. tightening the screw;
800. a right stationary ring; 810. a right static seal ring;
900. a transmission sleeve; 910. a right spring; 920. a push ring; 930. a third snap ring;
1000. a right rotating ring; 1010. a right movable sealing ring;
1100. spirally sucking the coil sleeve; 1110. a set screw;
1200. positioning blocks; 1210. mounting screws; 1220. and a positioning projection.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
As shown in fig. 1 to 3, the present double-end-surface balanced mechanical seal for a twin-screw pump includes:
a rotating shaft 100;
a shaft sleeve 200 which is sleeved outside the rotating shaft 100,
the left rotating ring 300 is sleeved outside the shaft sleeve 200 and embedded in the left end part of the shaft sleeve 200, the left rotating ring 300 is fixed with the shaft sleeve 200 through a first pin shaft 310, the first pin shaft 310 radially penetrates through the shaft sleeve 200 and the left rotating ring 300, and the first pin shaft 310 is in interference fit with the shaft sleeve 200;
a stationary ring seat 400 sleeved outside the shaft sleeve 200 and located at the right side of the left movable ring 300;
a left stationary ring 500 embedded in the left side of the stationary ring holder 400 and abutting against the left rotating ring 300, and a left spring 410 axially disposed between the left stationary ring 500 and the stationary ring holder 400;
the sealing disc 600 is sleeved outside the shaft sleeve 200 and located on the right side of the static ring seat 400, the left side face of the sealing disc 600 is attached to the static ring seat 400, a cooling cavity 610 is formed along the left side of the sealing disc 600 in a concave mode, and the sealing disc 600 is provided with a liquid inlet channel 620 and a liquid outlet channel 630 which penetrate through the cooling cavity 610;
a fastening ring 700 fitted on the right end of the shaft sleeve 200, the fastening ring 700 fixing the shaft sleeve 200 to the rotation shaft 100 by a set screw 710, the set screw 710 radially inserted into the fastening ring 700 and passing through the shaft sleeve 200;
a right stationary ring 800 embedded in the right side of the cooling chamber 610;
a driving sleeve 900 inserted into the cooling chamber 610 and located at the left side of the right stationary ring 800;
a right rotating ring 1000 which is embedded into the left side of the transmission sleeve 900 and is abutted against the right stationary ring 800, and a right spring 910 which is axially arranged is installed between the right rotating ring 1000 and the transmission sleeve 900;
the spiral suction winding sleeve 1100 is sleeved outside the transmission sleeve 900 and attached to the inner wall of the cooling cavity 610, the transmission sleeve 900 and the shaft sleeve 200 are fixed by the spiral suction winding sleeve 1100 through a fixing screw 1110, the fixing screw 1110 is radially inserted into the spiral suction winding sleeve 1100 to penetrate through the transmission sleeve 900, a spiral groove is formed in the outer side wall of the spiral suction winding sleeve 1100, and the spiral groove is communicated with the liquid inlet channel 620 and the liquid outlet channel 630.
This mechanical seal is bi-polar face balanced type mechanical seal to the sealed effect is guaranteed to the high pressure difference environment of adaptation double screw pump, and this mechanical seal is the sectional type design, the dismouting of being convenient for. In addition, spiral suction winding sleeve 1100 is similar to a screw in shape, and spiral suction winding sleeve 1100 is arranged, so that cooling liquid flows spirally along a spiral groove in cooling cavity 610, fully contacts with mechanical seal to take away more heat, cooling effect is improved, and sealing effect of the mechanical seal in a high-temperature environment is guaranteed.
A push ring 920 is arranged between the right spring 910 and the right rotating ring 1000 to ensure that the right spring 910 applies a uniform acting force to the right rotating ring 1000, thereby ensuring a sealing effect between the right rotating ring 1000 and the right stationary ring 800. Wherein, the left spring 410 and the right spring 910 are designed to be small springs, so that the pressure exerted by the left spring 410 and the right spring 910 is uniformly distributed.
In order to ensure the overall sealing effect of the mechanical seal, a left dynamic seal ring 320 is arranged between the left dynamic ring 300 and the shaft sleeve 200, a left static seal ring 510 is arranged between the left static ring 500 and the static ring seat 400, a right dynamic seal ring 1010 is arranged between the push ring 920 and the right dynamic ring 1000, and a right static seal ring 810 is arranged between the right static ring 800 and the seal disc 600, so as to prevent leakage during the operation of the mechanical seal.
The first snap ring 210 is embedded outside the shaft sleeve 200, and the first snap ring 210 is located in the cooling cavity 610 and abuts against the left end face of the transmission sleeve 900. The transmission sleeve 900 is positioned and installed through the arrangement of the first clamping ring 210, so that the installation position and the compression amount of the right spring 910 are positioned, and the pretightening force of the right movable ring 1000 and the right stationary ring 800 after the assembly is completed is guaranteed.
The second snap ring 220 is fitted around the shaft sleeve 200, and the second snap ring 220 abuts against the right end surface of the fastening ring 700. By setting. The fastening ring 700 is positioned and installed by arranging the second clamping ring 220, the fastening ring 700 is prevented from axially disengaging, and the reliability is better.
The inner wall of the transmission sleeve 900 is embedded with a third snap ring 930, the third snap ring 930 is close to the right end face of the transmission sleeve 900 and limits the right movable ring 1000 to be separated from the transmission sleeve 900 rightwards, so that the mechanical seal assembly is more convenient, and the sealing effect of the right movable seal ring 1010 is ensured.
In order to ensure the installation distance between the fastening ring 700 and the sealing disc 600, the mechanical seal further comprises a positioning block 1200, one end of the positioning block 1200 is connected with the sealing disc 600, the other end of the positioning block 1200 is fixedly connected with the fastening ring 700 through a mounting screw 1210, and the mounting screw 1210 radially penetrates through the positioning block 1200 and is inserted into the fastening ring 700. The positioning block 1200 is used only during installation, and the positioning block 1200 is removed during operation of the mechanical seal.
Preferably, one end of the positioning block 1200 is convexly formed with a positioning protrusion 1220, and the sealing disc 600 is concavely formed with a positioning groove 640 for the positioning protrusion 1220 to be inserted into. Through setting up location arch 1220, positioning groove 640, can make things convenient for installer dismouting locating piece 1200.
Second round pin axle 420 has been inserted to the axial between quiet ring seat 400 and the left quiet ring 500, and sealed dish 600 has third round pin axle 650 with the axial cartridge between the quiet ring 800 of right, and second round pin axle 420, third round pin axle 650 restrict left quiet ring 500, the quiet ring 800 circumferential direction of right respectively for left quiet ring 500, the quiet ring 800 installation of right side is more reliable.
The openings of the liquid inlet channel 620 and the liquid outlet channel 630 are respectively and detachably provided with a dustproof plug 660, so that the influence of external impurities entering the cooling cavity 610 on the normal operation of mechanical sealing is avoided.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (10)
1. A double end-face balanced mechanical seal for a twin screw pump comprising:
a rotating shaft;
the shaft sleeve is sleeved outside the rotating shaft;
the left rotating ring is sleeved outside the shaft sleeve and embedded into the left end part of the shaft sleeve, the left rotating ring is fixed with the shaft sleeve through a first pin shaft, and the first pin shaft radially penetrates through the shaft sleeve and the left rotating ring;
the static ring seat is sleeved outside the shaft sleeve and is positioned on the right side of the left dynamic ring;
the left stationary ring is embedded into the left side of the stationary ring seat and is abutted against the left movable ring, and a left spring is axially arranged between the left stationary ring and the stationary ring seat;
the sealing disc is sleeved outside the shaft sleeve and positioned on the right side of the static ring seat, the left side face of the sealing disc is attached to the static ring seat, a cooling cavity is formed along the left side of the sealing disc in a concave mode, and the sealing disc is provided with a liquid inlet channel and a liquid outlet channel which penetrate through the cooling cavity;
the fastening ring is sleeved at the right end of the shaft sleeve, the shaft sleeve and the rotating shaft are fixed by the fastening ring through a fastening screw, and the fastening screw is radially inserted into the fastening ring and penetrates through the shaft sleeve;
a right stationary ring embedded in the right side of the cooling cavity;
the transmission sleeve is embedded into the cooling cavity and is positioned on the left side of the right stationary ring;
the right movable ring is embedded into the left side of the transmission sleeve and is abutted against the right stationary ring, and a right spring which is axially arranged is arranged between the right movable ring and the transmission sleeve;
the spiral suction winding sleeve is sleeved outside the transmission sleeve and attached to the inner wall of the cooling cavity, the transmission sleeve and the shaft sleeve are fixed through the spiral suction winding sleeve through a fixing screw, the fixing screw is radially inserted into the spiral suction winding sleeve to penetrate through the transmission sleeve, a spiral groove is formed in the outer side wall of the spiral suction winding sleeve, and the spiral groove is communicated with the liquid inlet channel and the liquid outlet channel.
2. A double end-face balanced mechanical seal for a twin screw pump as defined in claim 1 wherein: and a push ring is arranged between the right spring and the right movable ring.
3. A double end-face balanced mechanical seal for a twin screw pump as defined in claim 2 wherein: a left dynamic sealing ring is arranged between the left dynamic ring and the shaft sleeve, a left static sealing ring is arranged between the left static ring and the static ring seat, a right dynamic sealing ring is arranged between the push ring and the right dynamic ring, and a right static sealing ring is arranged between the right static ring and the sealing disc.
4. A double end-face balanced mechanical seal for a twin screw pump as defined in claim 1 wherein: and a first clamping ring is embedded outside the shaft sleeve and is positioned in the cooling cavity and abutted against the left end face of the transmission sleeve.
5. A double end-face balanced mechanical seal for a twin screw pump as defined in claim 2 wherein: and a second clamping ring is embedded outside the shaft sleeve and is abutted against the right end face of the fastening ring.
6. A double end-face balanced mechanical seal for a twin screw pump as defined in claim 1 wherein: and a third clamping ring is embedded in the inner wall of the transmission sleeve, is close to the right end face of the transmission sleeve and limits the right movable ring to be separated from the transmission sleeve rightwards.
7. A double end-face balanced mechanical seal for a twin screw pump as defined in claim 1 wherein: the sealing device is characterized by further comprising a positioning block, one end of the positioning block is connected with the sealing disc, the other end of the positioning block is fixedly connected with the fastening ring through a mounting screw, and the mounting screw penetrates through the positioning block in the radial direction and is inserted into the fastening ring.
8. A double end-face balanced mechanical seal for a twin screw pump as defined in claim 7 wherein: the locating piece one end evagination is formed with the location arch, the sealed dish indent is formed with the positioning groove who supplies the protruding embedding of location.
9. A double end-face balanced mechanical seal for a twin screw pump as defined in claim 2 wherein: and a second pin shaft is axially inserted between the static ring seat and the left static ring, a third pin shaft is axially inserted between the sealing disc and the right static ring, and the second pin shaft and the third pin shaft respectively limit the circumferential rotation of the left static ring and the right static ring.
10. A double end-face balanced mechanical seal for a twin screw pump as defined in claim 1 wherein: the opening parts of the liquid inlet channel and the liquid outlet channel are respectively and detachably provided with a dustproof plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921813998.1U CN211039680U (en) | 2019-10-25 | 2019-10-25 | Double-end-face balanced mechanical seal for double-screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921813998.1U CN211039680U (en) | 2019-10-25 | 2019-10-25 | Double-end-face balanced mechanical seal for double-screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211039680U true CN211039680U (en) | 2020-07-17 |
Family
ID=71531329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921813998.1U Active CN211039680U (en) | 2019-10-25 | 2019-10-25 | Double-end-face balanced mechanical seal for double-screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211039680U (en) |
-
2019
- 2019-10-25 CN CN201921813998.1U patent/CN211039680U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9574667B2 (en) | Mechanical seal device | |
| JP5345619B2 (en) | Double mechanical seal device | |
| US4538820A (en) | Shaft seal | |
| JPWO2006137305A1 (en) | Mechanical seal device | |
| JP5380713B2 (en) | Mechanical seal device | |
| CN106369167A (en) | Integrated external spring compensation type mechanical sealing device | |
| US5055015A (en) | Seal structure for rotary body and vane-type rotary compressor employing the same | |
| GB2110770A (en) | Radial piston machine | |
| CN211039680U (en) | Double-end-face balanced mechanical seal for double-screw pump | |
| CN211039025U (en) | Single end face balanced mechanical seal for double-screw pump | |
| CN109058467A (en) | A kind of corrosion-resisting mechanical seal and installation method | |
| CN111336129A (en) | Dry gas sealing device convenient to assemble for pump | |
| CN108561654B (en) | Rotary joint | |
| JP4447237B2 (en) | Rotary joint | |
| CN112128097B (en) | Integrated mechanical seal for industrial cam rotor pump | |
| CN213017714U (en) | Mechanical seal with impeller | |
| CN112178197A (en) | Double-end-face integrated mechanical seal | |
| CN208935390U (en) | A kind of mechanical seal being easily installed | |
| CN111022316A (en) | Mechanical sealing device for rotor pump | |
| CN211715317U (en) | Mechanical sealing device for rotor pump | |
| CN219774348U (en) | Double-end-face mechanical seal for double-screw compressor | |
| CN211039679U (en) | A collection dress formula mechanical seal for motor test | |
| CN216110872U (en) | Integrated mechanical sealing structure with shunt bush on double end faces | |
| CN216789232U (en) | Novel mechanical sealing structure | |
| CN220622749U (en) | Screwless push-type mechanical seal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |