CN216618550U - Radial double-end-face mechanical sealing device for centrifugal pump with small axial space - Google Patents
Radial double-end-face mechanical sealing device for centrifugal pump with small axial space Download PDFInfo
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- CN216618550U CN216618550U CN202123393104.8U CN202123393104U CN216618550U CN 216618550 U CN216618550 U CN 216618550U CN 202123393104 U CN202123393104 U CN 202123393104U CN 216618550 U CN216618550 U CN 216618550U
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Abstract
The utility model discloses a radial double-end-face mechanical sealing device for a centrifugal pump with small axial space, which comprises a gland and a movable ring, and the mechanical sealing device also comprises: with the quiet ring of rotating ring complex one-level and the quiet ring of second grade all be used for enclosing the rotation axis of establishing the centrifugal pump and leave the clearance with the external diameter of rotation axis, the quiet ring of one-level and the quiet ring arrangement of second grade are in same radial direction and coaxial setting, be equipped with first round pin portion of inserting on one side external diameter face of the quiet ring of one-level, be equipped with the second round pin portion of inserting on one side internal diameter face of the quiet ring of second grade, the one end of the rotational lock of sharing is fixed on the gland, the other end just in time inserts and establishes the card and insert with the second round pin and prevent that one-level quiet ring and second grade quiet ring from rotating between portion at first round pin portion of inserting and the second round pin portion, install one-level spring and second grade spring on the gland, one-level spring contacts with the relative side bottom of the quiet ring of one-level and one-level spring is compression state and provides the closing force, second grade spring contacts with the relative side bottom of the quiet ring of second grade and second grade spring is the compression state and provides the closing force.
Description
Technical Field
The utility model relates to the technical field of mechanical sealing, in particular to a radial double-end-face mechanical sealing device for a centrifugal pump with small axial space.
Background
The axial space for installing the mechanical seal of some equipment such as a centrifugal pump is very small, meanwhile, working media of the equipment are toxic, harmful, inflammable, explosive and other dangerous substances, and any working media are not allowed to leak into the atmosphere on the site of the equipment, so that the double-end mechanical seal is required to be matched. The common double mechanical seal has two-stage seal in series arrangement, and the device requires large axial space and cannot meet the field installation requirement.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems and the defects in the prior art, the utility model provides a novel radial double-end-face mechanical sealing device for a centrifugal pump with a small axial space.
The utility model solves the technical problems through the following technical scheme:
the utility model provides a radial double-end-face mechanical sealing device for a centrifugal pump with small axial space, which comprises a gland and a movable ring and is characterized in that the mechanical sealing device also comprises: the one-level quiet ring of cooperation with the rotating ring and the quiet ring of second grade all are used for enclosing the rotation axis of establishing the centrifugal pump and leave the clearance with the external diameter of rotation axis, the quiet ring of one-level and the quiet ring arrangement of second grade are in same radial direction and coaxial setting, be equipped with first round pin portion of inserting on one side external diameter face of the quiet ring of one-level, be equipped with the second round pin portion of inserting on one side internal diameter face of the quiet ring of second grade, the one end of the rotational lock of sharing is fixed on the gland, the other end just in time inserts and establish the card and insert in order to prevent that the quiet ring of one-level and the quiet ring of second grade from rotating between portion of first round pin portion and the second round pin portion of inserting, install one-level spring and second grade spring on the gland, the opposite side bottom contact of one-level spring and the quiet ring of one-level and one-level spring are compression state and provide the closing force, the opposite side bottom contact of second grade spring and second grade quiet ring provide the closing force with compression state.
Preferably, the press cover is provided with a first groove and a second groove, a primary spring is fixed in the first groove, and a secondary spring is fixed in the second groove.
Preferably, the first pin inserting portion and the second pin inserting portion are pin grooves, and the two pin grooves are symmetrically arranged.
Preferably, the matching surface of the first-stage static ring, which is contacted with the dynamic ring, is a plane.
Preferably, the matching surface of the secondary static ring, which is contacted with the dynamic ring, is a plane.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the utility model.
The positive progress effects of the utility model are as follows:
according to the double-end-face mechanical sealing device, the primary seal (the primary static ring) and the secondary seal (the secondary static ring) are radially arranged, so that the axial space of the sealing device is greatly reduced, and the double-end-face mechanical sealing device is suitable for the requirement of double-end-face sealing of small axial space equipment.
Drawings
Fig. 1 is a schematic structural view of a radial double-end-face mechanical sealing device of a centrifugal pump with a small axial space according to a preferred embodiment of the utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, the present embodiment provides a radial double-end-face mechanical sealing device for a centrifugal pump with a small axial space, the mechanical sealing device includes a gland 1, a moving ring seat 2, a driving ring 3, a moving ring 6, a positioning block 8, and the like, which are existing mounting structures, and the mechanical sealing device includes: with 6 complex one-level quiet ring 4 of rotating ring and second grade quiet ring 5 all be used for enclosing the rotation axis 11 of establishing the centrifugal pump and leave the clearance with the external diameter of rotation axis 11, the quiet ring of one-level 4 and second grade 5 are arranged in same radial direction and coaxial setting, and the quiet ring of one-level 4 and second grade 5 are arranged in same radial direction, and the quiet ring of one-level 4 and second grade 5 and the cooperation of same rotating ring 6 have saved centrifugal pump axial space.
One side of the static ring 4 of one-level is equipped with the first round pin portion of inserting on the external diameter face, be equipped with the second round pin portion of inserting on the internal diameter face of one side of the static ring 5 of second grade, the one end of shared rotational pin 7 is fixed on gland 1, the other end just in time inserts and establishes the card and insert the portion with the second round pin in order to prevent that one-level static ring 4 and second grade static ring 5 from rotating between the portion. The first pin inserting portion and the second pin inserting portion are pin grooves, and the two pin grooves are symmetrically arranged. The first-stage static ring 4 and the second-stage static ring 5 share one anti-rotation pin 7 to prevent rotation, so that the radial space of the centrifugal pump is saved.
The gland 1 is provided with a first groove and a second groove, a first-stage spring 9 is fixed in the first groove, a second-stage spring 10 is fixed in the second groove, the first-stage spring 9 is in contact with the bottom of the opposite side of the first-stage stationary ring 4, the first-stage spring 9 is in a compressed state to provide closing force, and the second-stage spring 10 is in contact with the bottom of the opposite side of the second-stage stationary ring 5, and the second-stage spring 10 is in a compressed state to provide closing force. The first-level spring 9 and the second-level spring 10 are installed on the gland 1, axial space is saved, and meanwhile, the springs are not in contact with media and are not prone to corrosion and blockage. And, one-level spring 9 and second grade spring 10 are compression state at the during operation, for one-level quiet ring 4 and the quiet ring 5 of second provide an initial closing force, compensate the wearing and tearing volume behind one-level quiet ring 4 and the quiet ring 5 work simultaneously for the quiet ring surface that moves of moving ring 6 can be hugged closely better to one-level quiet ring 4 and the quiet ring 5 of second grade, form sealed face.
In addition, the matching surface of the first-stage static ring 4, which is in contact with the moving ring 6, is a plane, and the matching surface of the second-stage static ring 5, which is in contact with the moving ring 6, is a plane.
The drive ring 3 is fastened to the rotary shaft 11 by a set screw; the movable ring seat 2 is driven by a set screw to rotate along with the rotating shaft 11, and simultaneously, the movable ring seat drives the movable ring 6 to rotate together through a transmission pin.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications are within the scope of the utility model.
Claims (5)
1. A radial double mechanical seal for a centrifugal pump having a small axial space, comprising a gland and a rotating ring, wherein said mechanical seal further comprises: the one-level quiet ring of cooperation with the rotating ring and the quiet ring of second grade all are used for enclosing the rotation axis of establishing the centrifugal pump and leave the clearance with the external diameter of rotation axis, the quiet ring of one-level and the quiet ring arrangement of second grade are in same radial direction and coaxial setting, be equipped with first round pin portion of inserting on one side external diameter face of the quiet ring of one-level, be equipped with the second round pin portion of inserting on one side internal diameter face of the quiet ring of second grade, the one end of the rotational lock of sharing is fixed on the gland, the other end just in time inserts and establish the card and insert in order to prevent that the quiet ring of one-level and the quiet ring of second grade from rotating between portion of first round pin portion and the second round pin portion of inserting, install one-level spring and second grade spring on the gland, the opposite side bottom contact of one-level spring and the quiet ring of one-level and one-level spring are compression state and provide the closing force, the opposite side bottom contact of second grade spring and second grade quiet ring provide the closing force with compression state.
2. The radial double mechanical seal for a centrifugal pump having a small axial space of claim 1, wherein said gland has a first groove and a second groove, said first groove having a primary spring fixed therein, said second groove having a secondary spring fixed therein.
3. A radial double mechanical seal for a centrifugal pump having a small axial space as defined in claim 1 wherein said first and second pin portions are each a pin slot, said pin slots being symmetrically disposed.
4. The radial double mechanical seal for a centrifugal pump having a small axial space of claim 1, wherein said first stage stationary ring has a flat mating surface for contacting said rotating ring.
5. The radial double mechanical seal for a centrifugal pump having a small axial space of claim 1 wherein said secondary stationary ring has a flat mating surface for contacting said rotating ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123393104.8U CN216618550U (en) | 2021-12-30 | 2021-12-30 | Radial double-end-face mechanical sealing device for centrifugal pump with small axial space |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123393104.8U CN216618550U (en) | 2021-12-30 | 2021-12-30 | Radial double-end-face mechanical sealing device for centrifugal pump with small axial space |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216618550U true CN216618550U (en) | 2022-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123393104.8U Active CN216618550U (en) | 2021-12-30 | 2021-12-30 | Radial double-end-face mechanical sealing device for centrifugal pump with small axial space |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216618550U (en) |
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2021
- 2021-12-30 CN CN202123393104.8U patent/CN216618550U/en active Active
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