CN212429216U - Multi-stage oil pump - Google Patents
Multi-stage oil pump Download PDFInfo
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- CN212429216U CN212429216U CN202022540805.9U CN202022540805U CN212429216U CN 212429216 U CN212429216 U CN 212429216U CN 202022540805 U CN202022540805 U CN 202022540805U CN 212429216 U CN212429216 U CN 212429216U
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Abstract
The utility model is suitable for a non-positive displacement pump field specifically discloses a multistage oil pump, and this multistage oil pump includes rotor subassembly, drive side bearing body, first mechanical seal, drive side seal, first bearing bracket, casing, anterior segment, back end, a plurality of middle sections, a plurality of stator, balanced cover, pump cover, non-drive side seal, second mechanical seal, non-drive side bearing body and second bearing bracket. The utility model discloses a multistage oil pump keeps warm effectually, and heat exchange efficiency is high, and the axial force of the pump body is balanced by the balance plate, makes pump overall stability, equilibrium better, and the vibration range of the pump body is little.
Description
Technical Field
The utility model relates to a non-positive displacement pump technical field, in particular to multistage oil pump.
Background
The traditional multistage centrifugal pump adopts a high-efficiency energy-saving hydraulic model recommended by China, and has the advantages of high efficiency, energy conservation, wide performance range, safe and stable operation, low noise, long service life, convenience in installation and maintenance and the like; by changing the material and sealing form of the pump and adding a cooling system, hot water, oil, corrosive and abrasive-containing media and the like can be conveyed.
But due to the limited structural form and heat preservation capability, the following media are difficult to transport: neutral mineral water with solid particle content not greater than 1.5% and other similar sewage, medium with pressure over 0.6MPa, conveying temperature of-20 deg.c to 1050 deg.c, and corrosive medium, etc. In the pump operation process, because the rotation of pump causes the rotor to have slight vibrations, lead to rotor and stator clearance fit part to have some, face contact, for light contact, nevertheless because the pump rotational speed is higher, can cause wearing and tearing to stator and rotor part, especially can make the clearance increase after the wearing and tearing of choma part, influence the performance and the operating stability of pump. In addition, the existing pump body has the problems of poor heat preservation effect and low heat exchange efficiency.
Disclosure of Invention
In order to solve the technical problem, an object of the utility model is to provide a multistage oil pump, this multistage oil pump's heat preservation is effectual, and heat exchange efficiency is high to pump moving stability is good.
The above object of the utility model is realized through following technical scheme: a multistage oil pump comprising:
the rotor assembly comprises a pump shaft, a plurality of impellers, a balance disc, a semi-clamping ring and a clamping ring sleeve, wherein the impellers and the balance disc are sequentially connected with the pump shaft through keys, the impellers comprise 1 first-stage impeller, a plurality of second-stage impellers and 1 last-stage impeller, the first-stage impeller is positioned through a shaft shoulder of the pump shaft, 2 semi-clamping rings are arranged on the rear side of the balance disc, the 2 semi-clamping rings are connected with the clamping ring sleeve, and the clamping ring sleeve is connected with the balance disc through bolts to limit the balance disc and the impellers;
the driving side bearing body is arranged on the periphery of the front end of the pump shaft;
the first mechanical seal is arranged at the rear end of the drive side bearing body, sleeved on the pump shaft and used for axial sealing;
the driving side sealing body is arranged at the rear end of the first mechanical seal, sleeved on the pump shaft and connected with the first mechanical seal through a bolt;
a first bearing bracket, one end of which is connected with the drive side bearing body through a bolt, and the other end of which is connected with the drive side sealing body through a bolt;
a housing connected to the drive-side sealing body by a bolt;
the front section is arranged at the front end in the shell through a bolt;
the rear section is arranged at the rear end in the shell through a bolt;
the plurality of middle sections are sequentially arranged between the front section and the rear section, the plurality of middle sections comprise 1 first-stage middle section, a plurality of secondary middle sections and 1 last-stage middle section, the first-stage middle sections and the front section are fixed through bolts, the plurality of secondary middle sections are sequentially fixed through bolts, and the last-stage middle sections and the rear section are fixed through bolts;
the guide vanes are arranged in each middle section and comprise a first stage guide vane, a plurality of second stage guide vanes and 1 last stage guide vane, each second stage guide vane is in surface contact with each second stage middle section and is positioned through a pin, the first stage guide vane is in surface contact with the front section and is positioned through a pin, and the last stage guide vane is arranged on the outer side of the last stage middle section and is in surface contact with the last stage middle section and is positioned through a pin;
the balance sleeve is sleeved on the balance disc;
the center of the pump cover is sleeved on the balance sleeve and fixed through a bolt, and the pump cover is fixed with the rear end face of the shell through a bolt;
the non-driving side sealing body is arranged on the periphery of the rear end of the pump shaft and is connected with the pump cover through a bolt;
the second mechanical seal is arranged at the rear end of the non-driving side seal body, sleeved on the pump shaft and connected with the non-driving side seal body through a bolt;
the non-driving side bearing body is sleeved on the periphery of the tail end of the pump shaft;
and one end of the second bearing bracket is connected with the non-driving side sealing body through a bolt, and the other end of the second bearing bracket is connected with the non-driving side bearing body through a bolt.
Furthermore, a first O-shaped sealing ring is arranged between the balance sleeve and the pump cover.
Furthermore, the driving side sealing body and the non-driving side sealing body are respectively provided with a water baffle plate, the first bearing bracket and the second bearing bracket respectively fix the water baffle plate, and second O-shaped sealing rings are arranged between the water baffle plate and the inner wall surfaces of the driving side sealing body and the non-driving side sealing body.
Further, a first winding pad is arranged between the shell and the pump cover.
Further, a front section sealing ring is arranged between the front section and the first-stage impeller.
Further, a middle section sealing ring is arranged between each secondary middle section and each secondary impeller.
Furthermore, a protective ring is arranged between the pump cover and the rear section, and a second winding pad is arranged between the driving side sealing body and the shell.
Furthermore, a gap of 0.3mm-0.4mm is arranged between the front section sealing ring and the primary impeller opening ring.
Further, a guide vane sleeve is arranged between each guide vane and each impeller.
Further, a third O-shaped sealing ring is installed between the balance disc and the pump shaft.
The beneficial effects of the utility model reside in that:
(1) the utility model discloses set up the protective shroud between first winding pad, pump cover and the back end between casing and pump cover, make and have 2.5mm-3.5 mm's clearance between back end and the pump cover in the casing, make the medium can fill the entering pump uniformly in, the too big condition of difference in temperature can not appear, make the heat preservation effect of pump better, heat exchange efficiency is high.
(2) The gap of 0.3mm-0.4mm is arranged between the front section sealing ring and the first stage impeller opening ring, so that the connection of the pump is more stable; meanwhile, the arrangement of the front section sealing ring also plays a role in protecting main parts on the pump from being abraded, and after the front section sealing ring and the middle section sealing ring are abraded, the ring can be repaired or replaced, and a normal assembly gap is recovered, so that the pump is economical and convenient to overhaul.
(3) The utility model discloses the axial force of the pump body is balanced by the balance disc, makes pump overall stability, equilibrium better, and the vibration range of the pump body is little.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the structure of the rotor assembly;
in the figure:
1. a rotor assembly; 101. a pump shaft; 102. an impeller; 1021. a first stage impeller; 1022. a secondary impeller; 1023. a last stage impeller; 103. a balance disc; 104. a half snap ring; 105. a snap ring sleeve; 106. a third O-shaped sealing ring;
2. a drive-side bearing body; 3. a first mechanical seal; 4. a first bearing bracket; 5. a housing; 6. a front section; 7. a rear section;
8. a middle section; 81. a first stage middle section; 82. a secondary middle section; 83. a final stage middle section;
9. a guide vane; 91. a first stage guide vane; 92. a secondary guide vane; 93. a last stage guide vane;
10. a balance sleeve; 11. a pump cover; 12. a non-drive-side seal body; 13. a second mechanical seal; 14. a non-drive side bearing body; 15. a second bearing bracket; 16. a drive-side seal body; 17. a first O-ring seal; 18. a water baffle; 19. a second O-ring seal; 20. a first winding pad; 21. a front section sealing ring; 22. a middle section sealing ring; 23. a retainer; 24. a second winding pad; 25. and a guide vane sleeve.
Detailed Description
The detailed contents and specific embodiments of the present invention are further described below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 2, a multistage oil pump includes:
the rotor assembly 1 comprises a pump shaft 101, a plurality of impellers 102, a balance disc 103, a semi-clamping ring 104 and a clamping ring sleeve 105, wherein the impellers 102 and the balance disc 103 are sequentially connected with the pump shaft 101 through keys, the impellers 102 comprise 1 first-stage impeller 1021, a plurality of second- stage impellers 1022 and 1 last-stage impeller 1023, the first-stage impeller 1021 is positioned through a shaft shoulder of the pump shaft 101, 2 semi-clamping rings 104 are arranged on the rear side of the balance disc 103, the 2 semi-clamping rings 104 are connected with the clamping ring sleeve 105, and the clamping ring sleeve 105 is connected with the balance disc 103 through bolts to limit the balance disc 103 and the impellers 102;
a drive side bearing body 2 mounted on the outer periphery of the front end of the pump shaft 101;
the first mechanical seal 3 is arranged at the rear end of the drive side bearing body 2, sleeved on the pump shaft 101 and used for axial sealing;
the driving side sealing body 16 is arranged at the rear end of the first mechanical seal 3, is sleeved on the pump shaft 101 and is connected with the first mechanical seal 3 through a bolt;
a first bearing bracket 4 having one end connected to the drive side bearing body 2 by a bolt and the other end connected to the drive side sealing body 16 by a bolt for supporting;
a housing 5 connected to the drive-side sealing body 16 by a bolt;
a front section 6 mounted at the front end inside the housing 5 by bolts;
a rear section 7 mounted at the rear end inside the housing 5 by bolts;
a plurality of middle sections 8, which are sequentially arranged between the front section 6 and the rear section 7, wherein the plurality of middle sections 8 comprise 1 first-stage middle section 81, a plurality of secondary middle sections 82 and 1 last-stage middle section 83, the first-stage middle section 81 and the front section 6 are fixed by bolts, the plurality of secondary middle sections 82 are sequentially fixed by bolts, and the last-stage middle section 83 and the rear section 7 are fixed by bolts;
a plurality of guide vanes 9 are arranged in each middle section 8, each guide vane 9 comprises a first stage guide vane 91, a plurality of second stage guide vanes 92 and 1 last stage guide vane 93, each second stage guide vane 92 is in surface contact with each second stage middle section 82 and is positioned through a pin, the first stage guide vane 91 is in surface contact with the front section 6 and is positioned through a pin, and the last stage guide vane 93 is arranged on the outer side of the last stage middle section 83 and is in surface contact with the last stage middle section 83 and is positioned through a pin;
the balance sleeve 10 is sleeved on the balance disc 103;
the center of the pump cover 11 is sleeved on the balance sleeve 10 and fixed through a bolt, and the pump cover 11 is additionally fixed with the rear end face of the shell 5 through a bolt;
a non-driving side sealing body 12 installed on the outer periphery of the rear end of the pump shaft 101 and connected with the pump cover 11 through bolts;
the second mechanical seal 13 is arranged at the rear end of the non-driving side seal body 12, is sleeved on the pump shaft 101 and is connected with the non-driving side seal body 12 through a bolt;
a non-driving side bearing body 14 sleeved on the periphery of the tail end of the pump shaft 101;
and a second bearing bracket 15 having one end connected to the non-drive side seal body 12 by a bolt and the other end connected to the non-drive side bearing body 14 by a bolt for supporting.
A first O-ring 17 is disposed between the balance sleeve 10 and the pump cover 11.
The drive side seal body 16 and the non-drive side seal body 12 are respectively provided with a water baffle 18, the first bearing bracket 4 and the second bearing bracket 15 respectively fix the water baffle 18, and second O-shaped sealing rings 19 are respectively arranged between the water baffle 18 and the inner wall surfaces of the drive side seal body 16 and the non-drive side seal body 12.
A first gasket 20 is provided between the housing 5 and the pump cover 11.
A front sealing ring 21 is installed between the front section 6 and the first-stage impeller 1021.
A mid-section seal ring 22 is mounted between each of the secondary mid-sections 82 and each of the secondary impellers 1022.
A retainer 23 is arranged between the pump cover 11 and the rear section 7, and a second winding pad 24 is arranged between the driving side sealing body 16 and the housing 5.
A gap of 0.3mm-0.4mm is arranged between the front section sealing ring 21 and the first-stage impeller 1021 opening ring.
A third O-ring 106 is mounted between the balance disc 103 and the pump shaft 101.
The front section sealing ring 21, the middle section sealing ring 22 and the guide vane sleeve 25 are all made of alloy materials, so that the service life is long, the corrosion resistance is high, and the wear resistance is greatly improved.
The utility model discloses a theory of operation:
the utility model discloses rotary motion is done by the motor drive pump to the multistage oil pump through the shaft coupling. The shell and the pump cover of the original oil pump are of a dead-closed structure, a medium cannot pass through the dead-closed structure, and the heat insulation effect is poor. The utility model discloses a set up between casing 5 and pump cover 11 first winding pad 20, pump cover 11 and back end 7 and set up protective shroud 23, have 2.5mm-3.5 mm's clearance between back end 7 and the pump cover 11 in making casing 5, make the medium can fill uniformly and get into in the pump, the too big condition of difference in temperature can not appear, make the heat preservation effect of pump better.
The utility model is provided with the front end sealing ring 21 between the front section 6 and the first-stage impeller 1021, which avoids the direct contact and damage of the impeller and the pump case, and has the function of protecting the impeller, and a gap of 0.3mm-0.4mm is arranged between the front section sealing ring 21 and the first-stage impeller 1021, so that the connection of the pump is more stable; meanwhile, the arrangement of the front section sealing ring 21 also plays a role in protecting main parts on the pump from being abraded, and after the front section sealing ring 21 and the middle section sealing ring 22 are abraded, a ring can be repaired or replaced, and a normal assembly gap can be recovered, so that the pump is economical and convenient to overhaul.
The utility model discloses impeller and balance disc 103 at different levels of the rotor subassembly 1 of the pump body are connected to together by pump shaft 101 to carry out the transmission by the key. Wherein, a semi-snap ring 104 and a snap ring sleeve 105 are arranged behind the balance disk 103 for limiting and positioning the rest parts on the rotor assembly 1. The axial force of the pump body is balanced by the balance disc 103, so that the stability and balance of the pump are better, and the vibration amplitude of the pump is reduced.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (10)
1. A multistage oil pump, characterized by comprising:
the rotor assembly comprises a pump shaft, a plurality of impellers, a balance disc, a semi-clamping ring and a clamping ring sleeve, wherein the impellers and the balance disc are sequentially connected with the pump shaft through keys, the impellers comprise 1 first-stage impeller, a plurality of second-stage impellers and 1 last-stage impeller, the first-stage impeller is positioned through a shaft shoulder of the pump shaft, 2 semi-clamping rings are arranged on the rear side of the balance disc, the 2 semi-clamping rings are connected with the clamping ring sleeve, and the clamping ring sleeve is connected with the balance disc through bolts to limit the balance disc and the impellers;
the driving side bearing body is arranged on the periphery of the front end of the pump shaft;
the first mechanical seal is arranged at the rear end of the drive side bearing body, sleeved on the pump shaft and used for axial sealing;
the driving side sealing body is arranged at the rear end of the first mechanical seal, sleeved on the pump shaft and connected with the first mechanical seal through a bolt;
a first bearing bracket, one end of which is connected with the drive side bearing body through a bolt, and the other end of which is connected with the drive side sealing body through a bolt;
a housing connected to the drive-side sealing body by a bolt;
the front section is arranged at the front end in the shell through a bolt;
the rear section is arranged at the rear end in the shell through a bolt;
the plurality of middle sections are sequentially arranged between the front section and the rear section, the plurality of middle sections comprise 1 first-stage middle section, a plurality of secondary middle sections and 1 last-stage middle section, the first-stage middle sections and the front section are fixed through bolts, the plurality of secondary middle sections are sequentially fixed through bolts, and the last-stage middle sections and the rear section are fixed through bolts;
the guide vanes are arranged in each middle section and comprise a first stage guide vane, a plurality of second stage guide vanes and 1 last stage guide vane, each second stage guide vane is in surface contact with each second stage middle section and is positioned through a pin, the first stage guide vane is in surface contact with the front section and is positioned through a pin, and the last stage guide vane is arranged on the outer side of the last stage middle section and is in surface contact with the last stage middle section and is positioned through a pin;
the balance sleeve is sleeved on the balance disc;
the center of the pump cover is sleeved on the balance sleeve and fixed through a bolt, and the pump cover is fixed with the rear end face of the shell through a bolt;
the non-driving side sealing body is arranged on the periphery of the rear end of the pump shaft and is connected with the pump cover through a bolt;
the second mechanical seal is arranged at the rear end of the non-driving side seal body, sleeved on the pump shaft and connected with the non-driving side seal body through a bolt;
the non-driving side bearing body is sleeved on the periphery of the tail end of the pump shaft;
and one end of the second bearing bracket is connected with the non-driving side sealing body through a bolt, and the other end of the second bearing bracket is connected with the non-driving side bearing body through a bolt.
2. The multistage oil pump according to claim 1, wherein a first O-ring seal is provided between said balance sleeve and said pump cover.
3. The multistage oil pump according to claim 1, wherein water baffles are provided on said drive-side seal body and said non-drive-side seal body, respectively, and said first bearing bracket and said second bearing bracket fix said water baffles, respectively, and wherein second O-rings are provided between said water baffles and inner wall surfaces of said drive-side seal body and said non-drive-side seal body.
4. The multistage oil pump according to claim 1, wherein a first winding pad is provided between the housing and the pump cover.
5. A multistage oil pump as defined in claim 1, wherein a front-stage seal ring is installed between said front stage and the first-stage impeller.
6. The multi-stage oil pump of claim 1, wherein a mid-section seal ring is mounted between each said secondary mid-section and each secondary impeller.
7. The multistage oil pump according to claim 1, wherein a retainer is provided between the pump cover and the rear section, and a second gasket is provided between the drive-side seal body and the housing.
8. The multi-stage oil pump of claim 5, wherein a clearance of 0.3mm to 0.4mm is provided between the front-stage seal ring and the first-stage impeller eye.
9. The multistage oil pump as claimed in claim 1, wherein a vane sleeve is provided between each of said vanes and each of said impellers.
10. The multistage oil pump according to claim 1, wherein a third O-ring is installed between said balance disk and the pump shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022540805.9U CN212429216U (en) | 2020-11-06 | 2020-11-06 | Multi-stage oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022540805.9U CN212429216U (en) | 2020-11-06 | 2020-11-06 | Multi-stage oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212429216U true CN212429216U (en) | 2021-01-29 |
Family
ID=74279813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022540805.9U Active CN212429216U (en) | 2020-11-06 | 2020-11-06 | Multi-stage oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212429216U (en) |
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2020
- 2020-11-06 CN CN202022540805.9U patent/CN212429216U/en active Active
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