CN102734223A - Process pump for petrochemical industry - Google Patents
Process pump for petrochemical industry Download PDFInfo
- Publication number
- CN102734223A CN102734223A CN2012102036278A CN201210203627A CN102734223A CN 102734223 A CN102734223 A CN 102734223A CN 2012102036278 A CN2012102036278 A CN 2012102036278A CN 201210203627 A CN201210203627 A CN 201210203627A CN 102734223 A CN102734223 A CN 102734223A
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- Prior art keywords
- pump
- impeller
- cavity
- petrochemical process
- pump shaft
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 abstract description 14
- 239000002245 particle Substances 0.000 abstract description 10
- 238000004140 cleaning Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract 7
- 239000012530 fluid Substances 0.000 description 12
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention relates to a process pump for petrochemical industry. The process pump comprises a pump shell, a pump cover and a pump shaft; an impeller cavity is formed between the pump shell and the pump cover; an impeller which is connected to one end of the pump shaft and can be driven by the pump shaft to be rotated is arranged in the impeller cavity; the impeller is provided with a balance hole; the pump shell is provided with a pump inlet and a pump outlet; the surface of the inner wall of the impeller cavity formed by the pump cover is a flow guide surface; a sealing cavity is formed between the pump cover and the pump shaft; a mechanical sealing device is arranged in the sealing cavity; the flow guide surface is provided with a plurality of flow guide ribs which are radial from the center of the flow guide surface to the outer circumference; and when the pump shaft drives the impeller to rotate, a low pressure area is formed on a back pressure side of each flow guide rib, and a through hole which is communicated to the sealing cavity from the impeller cavity is formed in the low pressure area. The process pump has the combined structure of the flow guide ribs and the through hole, so that solid particles flowing in the sealing cavity and heat produced by friction of the mechanical sealing device can be carried away timely, the circulating cooling cleaning of a pump body can be realized, and the failure of the mechanical sealing device can be effectively avoided.
Description
Technical field
The present invention relates to a kind of petrochemical process pump.
Background technique
Petrochemical industry is the maximum rotating machinery of consumption in the petrochemical production device with pump, also is the maximum equipment of power consumption, and electricity consumption accounts for about 50% of full station service.The pressure medium that the petrochemical industry pump is carried is from the back pressure to 300MPa, and temperature is by subzero 140 ℃ to nearly 500 ℃, the medium thickness that has, and what have has a solid particle, and major part is corrosive.Therefore, seeking and get rid of the method to the influence of pump such as pressure medium, temperature, viscosity, solid contents, corrosivity, is the key that guarantees pump and mechanical seal safe and stable operation.Tradition petrochemical industry pump is had relatively high expectations to the pressure of fed sheet of a media, temperature, viscosity, solid content, corrosivity etc.; Can't reach and both be applicable to high temperature media; Be applicable to high pressure, high viscosity again, contain medium such as solid particle, therefore the Applicable scope of traditional petrochemical industry pump is less.
For the medium that contains solid particulate matter; Conventional method is through in Seal cage, introducing fluid from pump discharge; Cyclone hydraulic separators is installed, with the medium flushing Seal cage after filtering, though this scheme can reach the purpose of flushing simultaneously in introduction pipeline; But the wearing and tearing to impeller and pump cover are more serious, influence the working life of pump.
Summary of the invention
The purpose of this invention is to provide a kind of petrochemical process pump that can improve running environment in the Seal cage.
For achieving the above object, the technological scheme that the present invention adopts is:
A kind of petrochemical process pump; Comprise pump case, the pump cover that is connected with described pump case, be arranged at the pump shaft in the described pump case; Form impeller cavity between described pump case and the described pump cover; The impeller that is provided with the end that is connected in described pump shaft in the described impeller cavity and under the drive of described pump shaft, rotates offers equalizing orifice on the described impeller, and described pump case is provided with the perpendicular pump intake of the rotation surface of described impeller with along the pump discharge of the tangent direction of the surface of revolution of described impeller; The surface of the inwall of the described impeller cavity of formation of described pump cover is a guide face; Be formed with Seal cage between described pump cover and the described pump shaft, be provided with mechanical seal device in the described Seal cage, described guide face is provided with some guide ribs; Described guide rib by the center of described guide face to periphery radially; When described pump shaft drove the rotation of described impeller, the back pressure side of every described guide rib formed low pressure area, offered in the described low pressure area by described impeller cavity and connected the through hole to described Seal cage.
Preferably, described guide rib is straight line type or camber line shape or involute-type.
Preferably, described guide rib upwards evenly distributed in the week of described guide face.
Preferably,, described guide face is the annular that is surrounded by inner circumference and excircle, and described guide rib extends to described excircle by described inner circumference.
Preferably, offer two described through holes in each described low pressure area.
Preferably; Be connected with bearing housing on the described pump cover; Be provided with bearing support in axial sliding in the described bearing housing along described pump shaft; Be provided with adjusting screw between described bearing housing and the described bearing support, be provided with bearing in the described bearing support, described pump shaft is arranged in the described bearing.
Preferably, described through hole is opened in the edge of described guide rib.
Preferably, it also is provided with in liquid level indicator, temperature transducer, the vibration transducer one or more.
Working principle of the present invention is: when this petrochemical process pump work; Drive described pump shaft and described wheel rotation through power plant, make the fluid that contains solid particle flow into described impeller cavity and flow out by described pump discharge from described pump intake.In this course, fluid is through flowing in the described Seal cage behind the described equalizing orifice.Owing on described guide face, be provided with described guide rib, can quicken the flowing of fluid in the described impeller cavity.When wheel rotation; Form active side (in the face of a side of described direction of flow) respectively in the both sides of described guide rib (relative with described active side with the back pressure side; Side back to described direction of flow); And described back pressure side forms described low pressure area, offers the described through hole that connects with described Seal cage in this described low pressure area, can force fluid in described through hole to flow to described impeller cavity by described Seal cage and is pumped by pump discharge.Can make solid particle in the described Seal cage flow to described guide face and be accelerated with fluid like this pumps; Both can in time take away the solid particle that flows in the described Seal cage; Can in time take away the fricative heat of described mechanical seal device again, can effectively avoid mechanical seal device to lose efficacy owing to high temperature and obstruction.
Because the technique scheme utilization, the present invention compared with prior art has advantage:
1, because the present invention is provided with the composite structure of guide rib and through hole; Can in time take away the solid particle and the fricative heat of mechanical seal device that flow in the Seal cage; Realize the pump housing self circulation cooling cleaning, can effectively avoid mechanical seal device to lose efficacy;
2, reduce the abrasion of solid particulate matter, prolong the working life of pump impeller;
3, can remedy the leakage loss of impeller balance hole, and then improve pumping efficiency.
Description of drawings
Accompanying drawing 1 is the sectional view of petrochemical process pump of the present invention.
Accompanying drawing 2 be the petrochemical process pump of the present invention pump cover that adopts camber line shape guide rib plan view.
Accompanying drawing 3 is the plan view of pump cover of the employing lineal shape guide rib of petrochemical process pump of the present invention.
In the above accompanying drawing: 1, pump case; 2, pump cover; 3, pump shaft; 4, bearing housing; 5, bearing support; 6, adjusting screw; 7, bearing; 8, impeller cavity; 9, impeller; 10, equalizing orifice; 11, pump intake; 12, pump discharge; 13, guide face; 14, Seal cage; 15, mechanical seal device; 16, guide rib; 17, active side; 18, back pressure side; 19, low pressure area; 20, through hole; 21, controller.
Embodiment
Below in conjunction with embodiment shown in the drawings the present invention is further described.
Embodiment one: shown in accompanying drawing 1.
A kind of petrochemical process pump comprises pump case 1, the pump cover 2 that is connected with pump case 1, is arranged at pump shaft 3, the bearing housing 4 that is connected with pump cover 2 in the pump case 1, is arranged in the bearing housing 4 and along the bearing support in axial sliding 5 of pump shaft 3.Be provided with adjusting screw 6 between bearing housing 4 and the bearing support 5, be provided with bearing 7 in the bearing support 5, pump shaft 3 is arranged in the bearing 7 and it axially extends to pump cover 2 directions.Bearing support 5 can drive pump shaft 3 and impeller 9 along the moving axially of pump shaft 3, and then effectively controls the gap between impeller 9 and the pump case 1.Operation conditions for timely and effective monitoring and control pump; In liquid level indicator, temperature transducer, the vibration transducer one or more also can be set on bearing housing 4, and above-mentioned liquid level indicator, temperature transducer, vibration transducer are connected to controller 21 through lead.Pre-set bearing housing low alarm value, bearing temperature upper limit alarm value, vibration upper limit alarm value, noise upper limit alarm value in the control software on the controller 21; Any one index surpasses alarming value; All can give the alarm; Remind the staff in time to handle, effectively avoid the serious consequence that causes because of device damage, chemical industry escape of liquid.
Pump case 1 and pump cover 2 between form impeller cavity 8, be provided with the end that is connected in pump shaft 3 and the impeller 9 of rotation under the drive of pump shaft 3 in the impeller cavity 8, offer equalizing orifice 10 on the impeller 9.Pump case 1 is provided with the perpendicular pump intake 11 of the rotation surface of impeller 9 with along the pump discharge 12 of the tangent direction of the surface of revolution of impeller 9.The surface of the inwall of the formation impeller cavity 8 of pump cover 2 is a guide face 13, is formed with Seal cage 14 between pump cover 2 and the pump shaft 3, is provided with mechanical seal device 15 in the Seal cage 14.Guide face 13 is provided with some guide ribs 16; Guide rib 16 by the center of guide face 13 to periphery radially; Since the core of pump cover 2 along perpendicular direction extend and and pump shaft 3 between form Seal cage 14; Therefore guide face 13 is the annular that is surrounded by inner circumference and excircle, and guide rib 16 extends to excircle by inner circumference, and promptly an end of guide rib 16 and inner circumference are crossing and the other end and excircle are crossing.Guide rib 16 upwards evenly distributed in the week of guide face 13, and guide rib 16 can adopt straight line type or various ways such as camber line shape or involute-type, four guide ribs 16 that are camber line shape shown in the accompanying drawing 2, and be linear four guide ribs 16 shown in the accompanying drawing 3.
When 9 rotations of pump shaft 3 impeller; Fluid is in the Surface runoff of guide face 13; The both sides of every guide rib 16 form active side 17 (in the face of a side of direction of flow) and back pressure side 18 (relative with active side 17, back to a side of direction of flow) respectively, and form low pressure area 19 owing to hydrodynamic pressure is less in back pressure side 18; Offer in the low pressure area 19 by impeller cavity 8 and connect the through hole 20 to Seal cage 14, this through hole 20 is obliquely installed.Preferable, offer two through holes 20 in each low pressure area 19, and these two through holes 20 are near the edge setting of guide rib 16.
When this petrochemical process pump work, drive pump shaft 3 and impeller 9 rotations through power plant, the fluid that contains solid particle is flowed out from pump intake 11 inflow impeller cavities 8 and by pump discharge 12.In this course, fluid flows in the Seal cage 14 through equalizing orifice 10 backs.Owing on guide face 13, be provided with guide rib 16, can quicken the flowing of fluid in the impeller cavity 8.When impeller 9 rotates; Because the hydrodynamic pressure of low pressure area 19 is less; Can force fluid in through hole 20 to flow to impeller cavity 8 and pump by pump discharge 12 that thereby the solid particle that can make in the Seal cage 14 flows to guide face 13 with fluid and be accelerated and pump by pump discharge 12 by Seal cage 14; Both can in time take away the solid particle that flows in the Seal cage 14; Can in time take away mechanical seal device 15 fricative heats again, can effectively avoid mechanical seal device 15 to lose efficacy owing to high temperature and obstruction.
The foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to let the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (8)
1. petrochemical process pump; Comprise pump case, the pump cover that is connected with described pump case, be arranged at the pump shaft in the described pump case; Form impeller cavity between described pump case and the described pump cover; The impeller that is provided with the end that is connected in described pump shaft in the described impeller cavity and under the drive of described pump shaft, rotates offers equalizing orifice on the described impeller, and described pump case is provided with the perpendicular pump intake of the rotation surface of described impeller with along the pump discharge of the tangent direction of the surface of revolution of described impeller; The surface of the inwall of the described impeller cavity of formation of described pump cover is a guide face; Be formed with Seal cage between described pump cover and the described pump shaft, be provided with mechanical seal device in the described Seal cage, it is characterized in that: described guide face is provided with some guide ribs; Described guide rib by the center of described guide face to periphery radially; When described pump shaft drove the rotation of described impeller, the back pressure side of every described guide rib formed low pressure area, offered in the described low pressure area by described impeller cavity and connected the through hole to described Seal cage.
2. petrochemical process pump according to claim 1 is characterized in that: described guide rib is straight line type or camber line shape or involute-type.
3. petrochemical process pump according to claim 1 and 2 is characterized in that: described guide rib upwards evenly distributed in the week of described guide face.
4. petrochemical process pump according to claim 1 and 2 is characterized in that: described guide face is the annular that is surrounded by inner circumference and excircle, and described guide rib extends to described excircle by described inner circumference.
5. petrochemical process pump according to claim 1 is characterized in that: offer two described through holes in each described low pressure area.
6. petrochemical process pump according to claim 1; It is characterized in that: be connected with bearing housing on the described pump cover; Be provided with bearing support in axial sliding in the described bearing housing along described pump shaft; Be provided with adjusting screw between described bearing housing and the described bearing support, be provided with bearing in the described bearing support, described pump shaft is arranged in the described bearing.
7. petrochemical process pump according to claim 1 is characterized in that: described through hole is opened in the edge of described guide rib.
8. petrochemical process pump according to claim 1 is characterized in that: it also is provided with in liquid level indicator, temperature transducer, the vibration transducer one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210203627.8A CN102734223B (en) | 2012-06-20 | 2012-06-20 | Process pump for petrochemical industry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210203627.8A CN102734223B (en) | 2012-06-20 | 2012-06-20 | Process pump for petrochemical industry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102734223A true CN102734223A (en) | 2012-10-17 |
| CN102734223B CN102734223B (en) | 2014-05-07 |
Family
ID=46990308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210203627.8A Active CN102734223B (en) | 2012-06-20 | 2012-06-20 | Process pump for petrochemical industry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102734223B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671287A (en) * | 2013-12-09 | 2014-03-26 | 无锡艾比德泵业有限公司 | Centrifugal pump capable of adjusting gap between impeller and pump cover |
| CN108412817A (en) * | 2018-06-08 | 2018-08-17 | 安徽阿莫斯泵业有限公司 | A kind of centrifugal pump cover seal chamber self-cleaning structure |
| CN111188786A (en) * | 2020-03-05 | 2020-05-22 | 烟台阳光泵业有限公司 | Bearing box body with internal circulation lubrication and center support type single-stage cantilever centrifugal pump thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4099890A (en) * | 1975-08-21 | 1978-07-11 | Mitsui Mining & Smelting Co., Ltd. | Impeller type pump having seal means and protective means |
| CN2237133Y (en) * | 1995-03-18 | 1996-10-09 | 徐其国 | Direct connection single stage pump |
| US6913438B2 (en) * | 1996-05-14 | 2005-07-05 | Environamics | Pump lubrication system including an external reservoir |
| JP2004183532A (en) * | 2002-12-02 | 2004-07-02 | Teral Kyokuto Inc | Pump impeller peripheral structure for preventing air accumulation around mechanical seal |
| CN201013667Y (en) * | 2006-11-09 | 2008-01-30 | 北京航天石化技术装备工程公司 | Chemical centrifugal pump |
| CN202659581U (en) * | 2012-06-20 | 2013-01-09 | 江苏金鹰流体机械有限公司 | Petrochemical engineering process pump |
-
2012
- 2012-06-20 CN CN201210203627.8A patent/CN102734223B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671287A (en) * | 2013-12-09 | 2014-03-26 | 无锡艾比德泵业有限公司 | Centrifugal pump capable of adjusting gap between impeller and pump cover |
| CN108412817A (en) * | 2018-06-08 | 2018-08-17 | 安徽阿莫斯泵业有限公司 | A kind of centrifugal pump cover seal chamber self-cleaning structure |
| CN111188786A (en) * | 2020-03-05 | 2020-05-22 | 烟台阳光泵业有限公司 | Bearing box body with internal circulation lubrication and center support type single-stage cantilever centrifugal pump thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102734223B (en) | 2014-05-07 |
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