CN211715383U - Complete balance system of self-balancing multistage centrifugal pump - Google Patents
Complete balance system of self-balancing multistage centrifugal pump Download PDFInfo
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- CN211715383U CN211715383U CN201922493776.2U CN201922493776U CN211715383U CN 211715383 U CN211715383 U CN 211715383U CN 201922493776 U CN201922493776 U CN 201922493776U CN 211715383 U CN211715383 U CN 211715383U
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Abstract
The utility model relates to a complete balance system of a self-balancing multistage centrifugal pump, which comprises a left balance plate outer sleeve, a right balance plate outer sleeve, a left O-shaped ring, a right O-shaped ring, a fastening screw, a flat key, a left balance plate sleeve, a right balance plate sleeve, a left balance plate outer sleeve, a right balance plate outer sleeve, a left balance sleeve, a pressure balance seat, a water lubrication lining sleeve, a water lubrication shaft sleeve and a right balance sleeve, wherein a left primary balance surface is arranged between the left balance plate outer sleeve and a forward flow passage impeller, a right primary balance surface is arranged between the right balance plate outer sleeve and a reverse flow passage impeller, the left balance plate outer sleeve and the right balance plate outer sleeve are respectively fixed on the left balance plate sleeve and the right balance plate sleeve by the fastening screw, a left O-shaped ring is arranged between the left balance plate sleeve and the left balance plate outer sleeve, a right O-shaped ring is arranged between the right balance plate sleeve and the right balance plate outer sleeve, the left balance sleeve, the pressure balance seat and the right, the left balance plate sleeve, the right balance plate sleeve and the water lubricating shaft sleeve are fixed on the main shaft through flat keys.
Description
Technical Field
The invention relates to the field of hydraulic machinery, in particular to a complete balancing system of a self-balancing multistage centrifugal pump.
Background
Generally speaking, in a multistage centrifugal pump with two sets of impellers arranged in a forward-backward symmetric manner, the water flow direction of the multistage centrifugal pump flows from the last stage of the first set of impellers through a flow guide pipe into the first stage of the second set of impellers, and then is discharged from the last stage of the second set of impellers through an intermediate water outlet section. However, there is no balancing system between the two sets of impellers and the axial forces are not fully balanced. The problems to be solved by such a pump are: the pressure difference of one time of total pressure exists between the two sets of positive and negative symmetrical impeller sets, the axial force cannot be completely balanced, the residual axial force is always borne by the bearing, and along with the increase of the impeller stage number of the centrifugal pump, the residual unbalanced force can be increased, and the mechanical failure can be aggravated.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a self-balancing multistage centrifugal pump complete balance system.
The specific technical scheme is as follows:
a self-balancing multistage centrifugal pump fully balanced system comprising: a left balance plate outer sleeve, a left O-shaped ring, a right O-shaped ring, a fastening screw, a flat key, a left balance plate sleeve, a right balance plate sleeve, a left balance plate outer sleeve, a right balance plate outer sleeve, a left balance sleeve, a pressure balance seat, a water lubrication bush, a water lubrication shaft sleeve and a right balance sleeve, the left primary balance face is arranged between a left balance plate outer sleeve and a forward flow channel impeller, the right primary balance face is arranged between a right balance plate outer sleeve and a reverse flow channel impeller, the left balance plate outer sleeve and the right balance plate outer sleeve are fixed on the left balance plate outer sleeve and the right balance plate outer sleeve respectively through fastening screws, a left O-shaped ring is arranged between the left balance plate outer sleeve and the left balance plate outer sleeve, the right O-shaped ring is arranged between the right balance plate outer sleeve and the right balance plate outer sleeve, the left balance sleeve, the pressure balance seat and the right balance sleeve are respectively installed on a water outlet section, a water lubrication bushing is arranged on the pressure balance seat, a water lubrication bushing is arranged between the left balance plate sleeve and the right balance plate sleeve, and the left balance plate sleeve and the right balance plate sleeve and the water lubrication.
Furthermore, the small-head outer diameter of the left and right balance plate sleeves and the inner hole of the pressure balance seat are provided with movement gaps, and the outer diameter of the balance plate sleeve is provided with a labyrinth groove.
Further, the outer sleeve of the balance plate and the inner diameter of the balance sleeve are provided with a movement gap.
Furthermore, two ends of the left and right balance plate sleeves which are symmetrically arranged are respectively provided with a positive flow passage impeller and a reverse flow passage impeller.
Furthermore, the left and right balance plate sleeves, the left and right balance plate outer sleeves and the water lubricating shaft sleeve are integrally arranged on the main shaft and can rotate.
The utility model also provides a centrifugal pump, concrete technical scheme as follows:
a centrifugal pump comprising a self-balancing multistage centrifugal pump fully balanced system as described above.
The utility model has the advantages of:
1. by adding the complete balance system, the axial force of the centrifugal pump can be completely balanced, the failure rate of the centrifugal pump is greatly reduced, the maintenance period is prolonged, and the service life is prolonged.
2. And a pressure relief pipe is eliminated, so that the leakage amount of the centrifugal pump is reduced, the volume loss is reduced, and the working efficiency of the centrifugal pump is improved.
Drawings
Fig. 1 is a schematic structural view of a complete balancing system of a self-balancing multistage centrifugal pump of the present invention;
fig. 2 is a schematic structural diagram of a centrifugal pump equipped with the complete balancing system of the self-balancing multistage centrifugal pump of the present invention.
Reference numerals:
FIG. 1: the balance plate comprises a balance plate sleeve 901, a balance plate outer sleeve 902, a balance sleeve 903, a water inlet section 904, a pressure balance seat 905, a water lubrication bushing 906, a fastening screw 907, a water lubrication shaft sleeve 908, a right balance sleeve 909, flat keys 910 and 911, a fastening screw 912, an O-shaped ring 913, a reverse flow channel impeller 13, a primary balance surface 915, a tertiary balance surface 916, a middle section 16, a positive flow channel final stage guide vane 18, a water outlet section 31, a secondary balance cavity 32 and a quartic balance cavity 33.
FIG. 2: the main shaft 1, the roller bearing 2, the bearing spacer 3, the shaft sleeve 4, the impeller spacer 5, the positive runner first-stage impeller 6, the impeller bush 7, the positive runner impeller 8, the complete balance system 9, the ball bearing 10, the labyrinth pressure reducing sleeve 11, the reverse runner first-stage impeller 12, the reverse runner impeller 13, the bearing body assembly A14, the water inlet section A15, the middle section 16, the positive runner guide vane 17, the positive runner last-stage guide vane 18, the guide vane sleeve 19, the first-stage sealing ring 20, the sealing ring 21, the transition pipe 22, the sealing water pipe 23, the bearing body assembly B24, the packing gland 25, the auxiliary pressure reducing sealing assembly 26, the water inlet section B27, the reverse runner 28, the reverse runner guide vane 29, the tensioning bolt 30, the water outlet section 31, the secondary balance cavity 32, the quartic balance cavity 33, the positive runner impeller guide vane group 34, and the reverse runner impeller guide vane group 35.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is further described with reference to fig. 1-2.
As can be seen from fig. 1, a self-balancing multistage centrifugal pump complete balancing system comprises: the left and right balance plate outer sleeves 902, the left and right O-rings 913, the fastening screws 912, the flat keys 910, 911, the left and right balance plate outer sleeves 901, the left balance sleeve 903, the pressure balance seat 905, the water lubrication bush 906, the water lubrication shaft sleeve 908 and the right balance sleeve 909, wherein a left primary balance surface is arranged between the left balance plate outer sleeve 902 and the positive runner impeller, a right primary balance surface is arranged between the right balance plate outer sleeve 902 and the reverse runner impeller, the left and right balance plate outer sleeves 902 are respectively fixed on the left and right balance plate outer sleeves 901 by the fastening screws, the left O-ring 913 is arranged between the left balance plate outer sleeve 901 and the left balance plate outer sleeve 902, the right O-ring 913 is arranged between the right balance plate outer sleeve 901 and the right balance plate outer sleeve 902, the left balance sleeve 903, the pressure balance seat 905 and the right balance sleeve 909 are respectively arranged on the water outlet section 31, the water lubrication bush 906 is arranged on the pressure balance seat 905, the water lubrication shaft sleeve 908 is arranged between the left and right balance plate outer sleeve, the left and right balance plate sleeves 901 and the water lubrication shaft sleeve 908 are fixed on the main shaft 1 through flat keys 911 and 910.
Furthermore, the small-end outer diameter of the left and right balance plate sleeves 901 and the inner hole of the pressure balance seat 905 have a movement clearance, and the outer diameter of the balance plate outer sleeve 902 has a labyrinth groove.
Further, the balance plate outer sleeve 902 and the balance sleeve 903 have a movement clearance inside.
Further, two ends of the two symmetrically arranged left and right balance plate sleeves 901 are respectively provided with a positive flow passage impeller 8 and a reverse flow passage impeller 13.
Further, the left and right balance plate sleeves 901, the left and right balance plate outer sleeves 902, and the water lubrication bushing 908 are integrally mounted on the main shaft 1 to be rotatable.
The utility model also provides a centrifugal pump, concrete technical scheme as follows:
a centrifugal pump comprising a self-balancing multistage centrifugal pump fully balanced system as described above.
The utility model discloses a complete balanced system's of self-balancing multistage centrifugal pump theory of operation:
the unbalanced axial force generated in the positive runner impeller guide vane group can move towards the left, the high-pressure water can push against a complete balance system 9 on the rotor component to slightly move towards the right, the movement clearance between the inner hole end surface of the pressure balance seat 905 and the inner end surface of the balance plate sleeve 901 is reduced, the high-pressure water can enter a secondary balance cavity along the outer circle of the balance plate sleeve 902 and the inner circle of the balance sleeve 903, when the pressure of the secondary balance cavity is built, the rotor component can be pushed against to slightly move towards the left, the movement clearance between the inner hole end surface of the pressure balance seat 905 and the inner end surface of the balance plate sleeve 901 is increased, the unbalanced pressure is released, and therefore the axial force of the positive runner impeller guide vane group.
The unbalanced axial force that produces in the backward flow way impeller guide vane group can be moved to the right side, the complete balanced system 9 that the water under high pressure can push up in the rotor part is moved the fine motion to the right side, the hole terminal surface in pressure balance seat 905 and the terminal surface motion clearance in balanced plate cover 901 reduce, the water under high pressure can be along balanced plate cover 902 excircle and balanced cover 903 interior circle entering secondary balance chamber, after secondary balance chamber pressure is established, can push up the rotor part and move the fine motion to the left side, the hole terminal surface in pressure balance seat 905 and the terminal surface motion clearance increase in balanced plate cover 901, release unbalanced pressure, thereby the axial force basic balance to the backward flow way impeller guide vane group has been realized.
The liquid with the pressure released from the two ends can enter the movement gap between the inner diameter of the pressure balance seat 905 and the outer diameter of the small end of the balance plate sleeve 901, and because the pressure generated by the reverse flow passage impeller guide vane group is greater than the pressure generated by the forward flow passage impeller guide vane group, the liquid in the movement gap between the inner diameter of the pressure balance seat 905 and the outer diameter of the small end of the balance plate sleeve 901 can be pressed into the secondary balance cavity close to the end of the forward flow passage impeller guide vane group, so that the movement gap between the end surface of the inner diameter of the pressure balance seat 905 and the balance plate sleeve 901 of the reverse flow passage impeller guide vane group is reduced, meanwhile, the pressure in the secondary balance cavity close to the end is equal to the secondary balance cavity of the forward flow passage impeller guide vane group, and finally the axial force.
The utility model has the advantages of:
1. by adding the complete balance system, the axial force of the centrifugal pump can be completely balanced, the failure rate of the centrifugal pump is greatly reduced, the maintenance period is prolonged, and the service life is prolonged.
2. And a pressure relief pipe is eliminated, so that the leakage amount of the centrifugal pump is reduced, the volume loss is reduced, and the working efficiency of the centrifugal pump is improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a self-balancing multistage centrifugal pump complete balance system which characterized in that: comprises a left balance plate outer sleeve, a right balance plate outer sleeve, a left O-shaped ring, a right O-shaped ring, a fastening screw, a flat key, a left balance plate sleeve, a right balance plate sleeve, a left balance plate outer sleeve, a right balance plate outer sleeve, a left balance sleeve, a pressure balance seat, a water lubrication bush, a water lubrication shaft sleeve and a right balance sleeve, the left primary balance face is arranged between a left balance plate outer sleeve and a forward flow channel impeller, the right primary balance face is arranged between a right balance plate outer sleeve and a reverse flow channel impeller, the left balance plate outer sleeve and the right balance plate outer sleeve are fixed on the left balance plate outer sleeve and the right balance plate outer sleeve respectively through fastening screws, a left O-shaped ring is arranged between the left balance plate outer sleeve and the left balance plate outer sleeve, the right O-shaped ring is arranged between the right balance plate outer sleeve and the right balance plate outer sleeve, the left balance sleeve, the pressure balance seat and the right balance sleeve are respectively installed on a water outlet section, a water lubrication bushing is arranged on the pressure balance seat, a water lubrication bushing is arranged between the left balance plate sleeve and the right balance plate sleeve, and the left balance plate sleeve and the right balance plate sleeve and the water lubrication.
2. The self-balancing multistage centrifugal pump complete balancing system of claim 1, wherein: the small-head outer diameter of the left and right balance plate sleeves and the inner hole of the pressure balance seat are provided with movement gaps, and the outer diameter of the balance plate sleeve is provided with a labyrinth groove.
3. A self-balancing multistage centrifugal pump complete balancing system according to any one of claims 1-2, characterized in that: the balance plate outer sleeve and the inner diameter of the balance sleeve are provided with a movement gap.
4. A self-balancing multistage centrifugal pump complete balancing system according to any one of claims 1-2, characterized in that: two ends of the left and right balance plate sleeves which are symmetrically arranged are respectively provided with a positive flow passage impeller and a reverse flow passage impeller.
5. A self-balancing multistage centrifugal pump complete balancing system according to any one of claims 1-2, characterized in that: the left and right balance plate sleeves, the left and right balance plate outer sleeves and the water lubricating shaft sleeve are integrally arranged on the main shaft and can rotate.
6. A centrifugal pump characterized by: a fully balanced system comprising the self-balancing multistage centrifugal pump of any of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922493776.2U CN211715383U (en) | 2019-12-31 | 2019-12-31 | Complete balance system of self-balancing multistage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922493776.2U CN211715383U (en) | 2019-12-31 | 2019-12-31 | Complete balance system of self-balancing multistage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211715383U true CN211715383U (en) | 2020-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922493776.2U Active CN211715383U (en) | 2019-12-31 | 2019-12-31 | Complete balance system of self-balancing multistage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211715383U (en) |
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2019
- 2019-12-31 CN CN201922493776.2U patent/CN211715383U/en active Active
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