CN209925276U - Balance disc and mechanical sealing structure of multistage pump - Google Patents
Balance disc and mechanical sealing structure of multistage pump Download PDFInfo
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- CN209925276U CN209925276U CN201920384107.9U CN201920384107U CN209925276U CN 209925276 U CN209925276 U CN 209925276U CN 201920384107 U CN201920384107 U CN 201920384107U CN 209925276 U CN209925276 U CN 209925276U
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Abstract
The utility model relates to a balance disc and a mechanical sealing structure of a multistage pump, which comprises a pump body, a pump shaft, a balance disc, a balance sleeve, a baffle sleeve, a clamping ring sleeve and a mechanical seal; the pump shaft is arranged inside the pump body; the balance disc is arranged on the pump shaft; the balance sleeve is arranged on the balance disc and is fixedly connected with the pump body; the retaining sleeve is arranged on the pump shaft; the clamping ring sleeve is arranged on the pump shaft, and the clamping ring sleeve contacts the retaining sleeve; the mechanical seal is arranged on the pump shaft; the balance disc is provided with a groove which is a continuous groove; the balance disc is provided with a sealing ring and a water retaining ring; the clamping ring sleeve is fixedly connected with the balance disc through a screw; the mechanical seal is a cartridge mechanical seal structure. The utility model discloses can be used for the balance disc and the mechanical seal of multistage pump, novel structure is reasonable, and is with low costs, the dependable performance, long service life.
Description
Technical Field
The utility model relates to a balance disc and mechanical seal structure especially relate to a balance disc and mechanical seal structure of multistage pump.
Background
The multi-stage pump is a centrifugal pump combining a water inlet section and a water outlet section with a middle section through a pull rod, the output water pressure of the multi-stage pump can be very high, and the centrifugal force is obtained by the rotation of an impeller, so that materials are obtained. When the gas density reaches the working range of the mechanical vacuum pump, the gas is pumped out, so that high vacuum is gradually obtained. The multistage pump is a centrifugal pump which can change the volume because the volume of a pump cavity is changed to realize suction, compression and exhaust. The balance disk is a disk of centrifugal compressor placed behind last-stage impeller, and utilizes the axial thrust produced by pressure difference of gas on its two sides to partially counteract rotor axial force, and the external circle of the balance disk is equipped with a sealing device to make the disk retain pressure difference, so that it only can balance a portion of axial force to prevent rotor from making back and forth movement when it is worked, and the residual axial force can be borne by thrust bearing.
At present, the change of axial clearance is utilized to the balance disc of multistage pump, automatically regulated water passing amount, balanced axial thrust, axial clearance is generally 0.10 ~ 0.20mm when normally working, the pump shaft has certain axial displacement, often take place to grind the jamming phenomenon each other after balance disc and balance sleeve operation a period, lead to the balance disc to be very easily worn and torn, especially wearing and tearing great when starting and shutting down, mechanical seal also often has the leakage phenomenon, when the balance disc wearing and tearing are serious, can't play the effect of balanced multistage pump axial force, need carry out timely change, not only life is short, and need often maintain, greatly increased maintenance cost. Therefore, a balance disc and a mechanical sealing structure of a multistage pump are needed, grinding of the balance disc and a balance sleeve during long-time operation is effectively avoided, the mechanical sealing performance is reliable, the service life is prolonged, and the use and maintenance cost is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel structure is reasonable, with low costs, dependable performance, long service life's multistage pump's balance disc and mechanical seal structure.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a balance disc and a mechanical sealing structure of a multistage pump comprise a pump body, a pump shaft, a balance disc, a balance sleeve, a retaining sleeve, a clamping ring sleeve and a mechanical seal; the pump shaft is arranged inside the pump body; the balance disc is arranged on the pump shaft; the balance sleeve is arranged on the balance disc and is fixedly connected with the pump body; the retaining sleeve is arranged on the pump shaft and contacts the balance disc; the clamping ring sleeve is arranged on the pump shaft, and the clamping ring sleeve contacts the retaining sleeve; the mechanical seal is arranged on the pump shaft and is arranged at one end far away from the balance disc.
According to the balance disc and the mechanical sealing structure of the multistage pump, the groove is formed in the contact position of the balance disc and the balance sleeve, the groove is a continuous groove, a certain gap is formed between the balance disc and the balance sleeve, the balance disc and the balance sleeve are convenient to grind and clamp, the pump body does not generate grinding clamping stagnation phenomenon when running for a long time, the service life is longer, the pump body is safer and more stable, and the use and maintenance cost is lower.
According to the balance disc and the mechanical sealing structure of the multistage pump, the balance disc is provided with the sealing ring and the water retaining ring, the sealing ring and the water retaining ring are arranged between the balance disc and the pump shaft, the medium leakage between the balance disc and the pump shaft along with the medium leakage can be avoided inevitably due to the groove formed in the balance disc, the sealing ring and the water retaining ring can further prevent the leakage, the sealing performance is better, the energy consumption is smaller, and the use is safer and more reliable.
According to the balance disc and the mechanical seal structure of the multistage pump, the clamping ring sleeve is fixedly connected with the balance disc through the screw, the traditional original machine seal shaft sleeve is convenient to remove, the locking nut thread locking mode is changed into the locking mode of screw connection between the clamping ring sleeve and the balance disc, the corresponding pump shaft and the clamping ring sleeve do not need to be processed into thread forms, the optical axis form is adopted, the processing is simpler, the installation is more convenient, the manufacturing cost is lower, and the economic benefit is more remarkable.
As above balance disc and mechanical seal structure of multistage pump, balance disc and snap ring sheathe in and all be equipped with the screw hole, the screw hole on the balance disc is corresponding with the screw hole that the snap ring sheathes in, the structure of being convenient for is simpler reasonable, installs more convenient and fast, labour saving and time saving, the cost of labor is lower.
As above-mentioned balance disc and mechanical seal structure of multistage pump, mechanical seal be collection dress formula mechanical seal structure, be convenient for traditional original non-collection dress mechanical seal need process axle sleeve and mechanical seal gland in addition, the mechanical seal is installed on the axle sleeve of collection dress, and collection dress formula mechanical seal installation is simple, directly with whole mechanical seal part impel the sealed chamber can, just also collection dress formula mechanical seal direct mount is on the pump shaft, do not need to process axle sleeve and mechanical seal gland, its life and sealed effect far exceed original non-collection dress mechanical seal structure, and the inner structure of mechanical seal also has the variety, sealing performance is better, use cost is lower, life is longer.
As the optimal scheme of the balance disc and the mechanical sealing structure of the multistage pump, the outer surface of the balance disc is provided with the wear-resistant surface, so that the wear-resistant balance disc is better in durability, more durable and longer in service life.
As the preferred scheme of the balance disc and the mechanical sealing structure of the multistage pump, the screw is made of alloy steel, so that the connection is firmer and more stable, the strength is higher, the use is safer and more reliable, and the service life is longer.
As the preferred scheme of the balance disc and the mechanical sealing structure of the multistage pump, the contact part of the screw, the snap ring sleeve and the balance disc is provided with the sealing washer, so that the connection is firmer and more stable, the contact is tighter, and the use is safer and more reliable.
As the optimal scheme of the balance disc and the mechanical sealing structure of the multistage pump, the mechanical seal is provided with the sealing seat which is fixedly connected with the pump body, so that the multistage pump is convenient to install, simpler and more convenient, firmer and more stable, has better sealing performance, and is safer and more reliable.
The utility model has the advantages that: the pump shaft of the utility model is arranged inside the pump body; the balance disc is arranged on the pump shaft; the balance sleeve is arranged on the balance disc and is fixedly connected with the pump body; the blocking sleeve is arranged on the pump shaft and contacts the balance disc; the clamping ring sleeve is arranged on the pump shaft, and the clamping ring sleeve contacts the retaining sleeve; the mechanical seal is arranged on the pump shaft and is arranged at one end far away from the balance disc; the balance disc is provided with a groove, the groove is arranged at the contact part of the balance disc and the balance sleeve, and the groove is a continuous groove; the balance disc is provided with a sealing ring and a water retaining ring, and the sealing ring and the water retaining ring are arranged between the balance disc and the pump shaft; the clamping ring sleeve is fixedly connected with the balance disc through a screw; the balance disc and the clamping ring sleeve are both provided with screw holes, and the screw holes on the balance disc correspond to the screw holes on the clamping ring sleeve; mechanical seal is cartridge type mechanical seal structure, the utility model discloses can be used for the balance disc and the mechanical seal of multistage pump, novel structure is reasonable, and is with low costs, the dependable performance, long service life.
Drawings
FIG. 1 is a schematic structural diagram of a balance disc and a mechanical seal structure of a multi-stage pump in an embodiment;
fig. 2 is a partial enlarged view of a balance disk and a mechanical seal structure of the multistage pump in the embodiment.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 1 and 2, a balance disc and mechanical seal structure of a multistage pump includes a pump body 1, a pump shaft 2, a balance disc 3, a balance sleeve 4, a retaining sleeve 5, a snap ring sleeve 6 and a mechanical seal 7; the pump shaft 2 is arranged inside the pump body 1; the balance disc 3 is arranged on the pump shaft 2; the balance sleeve 4 is arranged on the balance disc 3, and the balance sleeve 4 is fixedly connected with the pump body 1; the retaining sleeve 5 is arranged on the pump shaft 2, and the retaining sleeve 5 is contacted with the balance disc 3; the snap ring sleeve 6 is arranged on the pump shaft 2, and the snap ring sleeve 6 is contacted with the retaining sleeve 5; the mechanical seal 7 is arranged on the pump shaft 2, and the mechanical seal 7 is arranged at one end far away from the balance disc 3.
In one embodiment of the balance disc and the mechanical sealing structure of the multistage pump, the balance disc 3 is provided with the groove 8, the groove 8 is arranged at the contact part of the balance disc 3 and the balance sleeve 4, the groove 8 is a continuous groove 8, a certain gap is formed between the balance disc 3 and the balance sleeve 4, the pump body 1 is not prone to grinding and clamping stagnation of the balance disc 3 and the balance sleeve 4 when running for a long time, the service life is longer, the mechanical sealing structure is safer and more stable, and the use and maintenance cost is lower.
In one embodiment of the balance disc and the mechanical sealing structure of the multistage pump, the balance disc 3 is provided with a sealing ring 9 and a water retaining ring 10, the sealing ring 9 and the water retaining ring 10 are arranged between the balance disc 3 and the pump shaft 2, the balance disc 3 is provided with a groove 8, leakage of media between the balance disc 3 and the pump shaft 2 can be avoided, the sealing ring 9 and the water retaining ring 10 can be further used for preventing leakage, the sealing performance is better, the energy consumption is smaller, and the use is safer and more reliable.
In one embodiment of the balance disc and the mechanical sealing structure of the multistage pump, the snap ring sleeve 6 is fixedly connected with the balance disc 3 through the screw 11, the traditional original mechanical seal shaft sleeve is convenient to remove, the locking nut thread locking mode is changed into the locking mode of the screw 11 connection between the snap ring sleeve 6 and the balance disc 3, the corresponding pump shaft 2 and the snap ring sleeve 6 do not need to be processed into a thread mode, an optical axis mode is adopted, the processing is simpler, the installation is more convenient, the manufacturing cost is lower, and the economic benefit is more remarkable.
In one embodiment of the balance disc and the mechanical sealing structure of the multistage pump, the balance disc 3 and the snap ring sleeve 6 are respectively provided with a screw hole, the screw holes in the balance disc 3 correspond to the screw holes in the snap ring sleeve 6, so that the multistage pump is simple and reasonable in structure, convenient and fast to install, time-saving and labor-saving, and lower in labor cost.
In an embodiment of the balance disc and the mechanical sealing structure of the multistage pump, the mechanical seal 7 is a container type mechanical seal 7 structure, an additional shaft sleeve and a machine seal gland are required to be processed for the traditional original non-container machine seal, the machine seal is installed on the shaft sleeve of the machine seal, the container type mechanical seal 7 is simple to install, the whole machine seal component is directly pushed into a sealing cavity, namely, the container type mechanical seal 7 is directly installed on the pump shaft 2, the shaft sleeve and the machine seal gland are not required to be processed, the service life and the sealing effect of the container type mechanical seal far exceed the original non-container machine seal structure, and the internal structure of the machine seal also has diversity, the sealing performance is better, the use cost is lower, and the service life is longer.
In one embodiment of the balance disc and the mechanical sealing structure of the multistage pump, the outer surface of the balance disc 3 is provided with a wear-resistant surface, so that the multistage pump is better in durability, more durable and longer in service life.
In one embodiment of the balance disc and the mechanical sealing structure of the multistage pump, the screw 11 is made of alloy steel, so that the multistage pump is more firm and stable in connection, higher in strength, safer and more reliable in use and longer in service life.
In one embodiment of the balance disc and the mechanical sealing structure of the multistage pump, the contact part of the screw 11, the snap ring sleeve 6 and the balance disc 3 is provided with a sealing gasket, so that the connection is firmer and more stable, the contact is tighter, and the use is safer and more reliable.
In one embodiment of the balance disc and the mechanical sealing structure of the multistage pump, the mechanical seal 7 is provided with a sealing seat, and the sealing seat is fixedly connected with the pump body 1, so that the multistage pump is simpler and more convenient to mount, firmer and more stable, better in sealing performance, safer and more reliable.
The pump shaft 2 of the utility model is arranged inside the pump body 1; the balance disc 3 is arranged on the pump shaft 2; the balance sleeve 4 is arranged on the balance disc 3, and the balance sleeve 4 is fixedly connected with the pump body 1; the retaining sleeve 5 is arranged on the pump shaft 2, and the retaining sleeve 5 contacts the balance disc 3; the snap ring sleeve 6 is arranged on the pump shaft 2, and the snap ring sleeve 6 contacts the retaining sleeve 5; the mechanical seal 7 is arranged on the pump shaft 2, and the mechanical seal 7 is arranged at one end far away from the balance disc 3; the balance disc 3 is provided with a groove 8, the groove 8 is arranged at the contact part of the balance disc 3 and the balance sleeve 4, and the groove 8 is a continuous groove 8; the balance disc 3 is provided with a sealing ring 9 and a water retaining ring 10, and the sealing ring 9 and the water retaining ring 10 are arranged between the balance disc 3 and the pump shaft 2; the clamping ring sleeve 6 is fixedly connected with the balance disc 3 through a screw 11; screw holes are formed in the balance disc 3 and the clamping ring sleeve 6, and the screw holes in the balance disc 3 correspond to the screw holes in the clamping ring sleeve 6; the mechanical seal 7 is a cartridge type mechanical seal 7 structure. The utility model discloses can be used for the balance disc and the mechanical seal of multistage pump, novel structure is reasonable, and is with low costs, the dependable performance, long service life.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (6)
1. The utility model provides a balance disc and mechanical seal structure of multistage pump which characterized in that: comprises a pump body (1), a pump shaft (2), a balance disc (3), a balance sleeve (4), a retaining sleeve (5), a snap ring sleeve (6) and a mechanical seal (7); the pump shaft (2) is arranged inside the pump body (1); the balance disc (3) is arranged on the pump shaft (2); the balance sleeve (4) is arranged on the balance disc (3), and the balance sleeve (4) is fixedly connected with the pump body (1); the retaining sleeve (5) is arranged on the pump shaft (2), and the retaining sleeve (5) is contacted with the balance disc (3); the snap ring sleeve (6) is arranged on the pump shaft (2), and the snap ring sleeve (6) is contacted with the retaining sleeve (5); the mechanical seal (7) is arranged on the pump shaft (2), and the mechanical seal (7) is arranged at one end far away from the balance disc (3).
2. The balance disk and mechanical seal structure of a multistage pump according to claim 1, wherein: the balance disc (3) is provided with a groove (8), the groove (8) is arranged at the contact part of the balance disc (3) and the balance sleeve (4), and the groove (8) is a continuous groove.
3. The balance disk and mechanical seal structure of a multistage pump according to claim 1, wherein: the balance disc (3) is provided with a sealing ring (9) and a water retaining ring (10), and the sealing ring (9) and the water retaining ring (10) are arranged between the balance disc (3) and the pump shaft (2).
4. The balance disk and mechanical seal structure of a multistage pump according to claim 1, wherein: the clamping ring sleeve (6) is fixedly connected with the balance disc (3) through a screw (11).
5. The balance disk and mechanical seal structure of a multistage pump according to claim 1, wherein: the balance disc (3) and the clamping ring sleeve (6) are provided with screw holes, and the screw holes in the balance disc (3) correspond to the screw holes in the clamping ring sleeve (6).
6. The balance disk and mechanical seal structure of a multistage pump according to claim 1, wherein: the mechanical seal (7) is a cartridge type mechanical seal structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920384107.9U CN209925276U (en) | 2019-03-25 | 2019-03-25 | Balance disc and mechanical sealing structure of multistage pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920384107.9U CN209925276U (en) | 2019-03-25 | 2019-03-25 | Balance disc and mechanical sealing structure of multistage pump |
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| Publication Number | Publication Date |
|---|---|
| CN209925276U true CN209925276U (en) | 2020-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920384107.9U Active CN209925276U (en) | 2019-03-25 | 2019-03-25 | Balance disc and mechanical sealing structure of multistage pump |
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| Country | Link |
|---|---|
| CN (1) | CN209925276U (en) |
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2019
- 2019-03-25 CN CN201920384107.9U patent/CN209925276U/en active Active
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