CN202659581U - Petrochemical engineering process pump - Google Patents
Petrochemical engineering process pump Download PDFInfo
- Publication number
- CN202659581U CN202659581U CN 201220290032 CN201220290032U CN202659581U CN 202659581 U CN202659581 U CN 202659581U CN 201220290032 CN201220290032 CN 201220290032 CN 201220290032 U CN201220290032 U CN 201220290032U CN 202659581 U CN202659581 U CN 202659581U
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- China
- Prior art keywords
- pump
- impeller
- cavity
- petrochemical process
- pump shaft
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- Withdrawn - After Issue
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Abstract
The utility model relates to a petrochemical engineering process pump comprising a pump shall, a pump cover and a pump shell, wherein an impeller cavity is formed between the pump shell and the pump cover, an impeller is arranged in the impeller cavity, the impeller is connected with one end portion of the pump shaft and rotates under drive of the pump shaft, a balance hole is arranged in the impeller, and a pump inlet and a pump outlet are arranged on the pump shell. The surface of the inner wall of the impeller cavity formed on the pump cover is a flow guiding face. A sealing cavity is formed between the pump cover and the pump shaft, a mechanical sealing device is arranged in the sealing cavity, and a plurality of flow guiding ribs are disposed on the flow guiding face and are in radial shape from the center to the periphery of the flow guiding face. When the pump shaft drives the impeller to rotate, a low-pressure area is formed on the back-pressure side of each flow guiding rib, and a through hole penetrating through the impeller cavity to the sealing cavity is arranged in the low-pressure area. As a combined structure of the flow guiding ribs and the through hole is arranged, the petrochemical engineering process pump can take away solid particles flowing into the sealing cavity and heat generated due to friction of the mechanical sealing device. Therefore, circulation cooling and cleaning of a pump body are achieved and the mechanical sealing device is effectively prevented from failing.
Description
Technical field
The utility model relates to a kind of petrochemical process pump.
Background technique
Petrochemical pump is the rotating machinery of consumption maximum in the petrochemical production device, 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 ℃, some medium thickness, have with solid particle, and major part is corrosive.Therefore, seeking and get rid of pressure medium, temperature, viscosity, solid contents, corrosivity etc. to the method for the impact of pump, is the key that guarantees pump and mechanical seal safe and stable operation.The tradition petro-chemical 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 again high pressure, high viscosity, contain the medium such as solid particle, therefore the Applicable scope of traditional petro-chemical pump is less.
For the medium that contains solid particulate matter, conventional method is to introduce fluid in from pump discharge to Seal cage, cyclone hydraulic separators is installed in introduction pipeline simultaneously, with the medium flushing Seal cage after filtering, although this scheme can reach the purpose of flushing, but the wearing and tearing to impeller and pump cover are more serious, affect the working life of pump.
Summary of the invention
The purpose of this utility model provides a kind of petrochemical process pump that can improve running environment in the Seal cage.
For achieving the above object, the technical solution adopted in the utility model 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, be provided with an end that is connected in described pump shaft and the impeller that under the drive of described pump shaft, rotates in the described impeller cavity, offer equalizing orifice on the described impeller, be provided with on the described pump case 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 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, be provided with some guide ribs on the described guide face, described guide rib by the center of described guide face to periphery radially, when described pump shaft drives described vane rotary, the back pressure side of every described guide rib forms low pressure area, offers in the described low pressure area by described impeller cavity and connects the extremely through hole of described Seal cage.
Preferably, described guide rib is straight line type or arc line shaped 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 the in axial sliding bearing support along described pump shaft in the described bearing housing, 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.
The utility model working principle is: when this petrochemical process pump work, drive described pump shaft and described wheel rotation by power plant, make the fluid that contains solid particle flow into described impeller cavity and flowed out by described pump discharge from described pump intake.In this course, fluid is by flowing in the described Seal cage behind the described equalizing orifice.Owing to being provided with described guide rib at described guide face, can accelerate the flowing of fluid in the described impeller cavity.When wheel rotation, form respectively active side (in the face of a side of described direction of flow) 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, offer 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 pumped by pump discharge.Like this can be so that the solid particle in the described Seal cage flows to described guide face and is accelerated with fluid 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 technique scheme is used, the utility model compared with prior art has following advantages:
1, because the utility model 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 cleaning of the pump housing self circulating cooling, can effectively avoid mechanical seal device to lose efficacy;
2, reduce solid particulate matter to the abrasion of impeller, prolong the working life of pump;
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 utility model.
Accompanying drawing 2 be the petrochemical process pump of the present utility model pump cover that adopts the arc line shaped 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 utility model.
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 utility model 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 in axial sliding bearing support 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 by wire.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 process, effectively avoid the serious consequence that causes because of device damage, chemical industry fluid leakage.
Pump case 1 and pump cover 2 between form impeller cavity 8, be provided with an end that is connected in pump shaft 3 and the impeller 9 that under the drive of pump shaft 3, rotates in the impeller cavity 8, offer equalizing orifice 10 on the impeller 9.Be provided with on the pump case 1 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 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.Be provided with some guide ribs 16 on the guide face 13, 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, guide rib 16 extends to excircle by inner circumference, and namely an end of guide rib 16 and inner circumference intersect 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 the various ways such as arc line shaped or involute-type, is four guide ribs 16 of arc line shaped shown in the accompanying drawing 2, and is linear four guide ribs 16 shown in the accompanying drawing 3.
When 9 rotation of pump shaft 3 impeller, fluid flows on the surface of guide face 13, the both sides of every guide rib 16 form respectively active side 17(in the face of a side of direction of flow) relative with active side 17 with back pressure side 18(, side back to direction of flow), 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 through hole 20 to Seal cage 14, this through hole 20 is obliquely installed.Better, 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 by 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 is by in the equalizing orifice 10 rear inflow Seal cages 14.Owing to being provided with guide rib 16 at guide face 13, can accelerate 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 by Seal cage 14 and pumped 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 by pump discharge 12 and pump, both can in time take away the solid particle that flows in the Seal cage 14, can in time take away again mechanical seal device 15 fricative heats, can effectively avoid mechanical seal device 15 to lose efficacy owing to high temperature and obstruction.
Above-described embodiment only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with technique can understand content of the present utility model and according to this enforcement, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, and all should be encompassed within the protection domain of the present utility model.
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, be provided with an end that is connected in described pump shaft and the impeller that under the drive of described pump shaft, rotates in the described impeller cavity, offer equalizing orifice on the described impeller, be provided with on the described pump case 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 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: be provided with some guide ribs on the described guide face, described guide rib by the center of described guide face to periphery radially, when described pump shaft drives described vane rotary, the back pressure side of every described guide rib forms low pressure area, offers in the described low pressure area by described impeller cavity and connects the extremely through hole of described Seal cage.
2. petrochemical process pump according to claim 1, it is characterized in that: described guide rib is straight line type or arc line shaped 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, it 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 the in axial sliding bearing support along described pump shaft in the described bearing housing, 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, it is characterized in that: described through hole is opened in the edge of described guide rib.
8. petrochemical process pump according to claim 1, it 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 |
|---|---|---|---|
| CN 201220290032 CN202659581U (en) | 2012-06-20 | 2012-06-20 | Petrochemical engineering process pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220290032 CN202659581U (en) | 2012-06-20 | 2012-06-20 | Petrochemical engineering process pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202659581U true CN202659581U (en) | 2013-01-09 |
Family
ID=47454490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220290032 Withdrawn - After Issue CN202659581U (en) | 2012-06-20 | 2012-06-20 | Petrochemical engineering process pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202659581U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734223B (en) * | 2012-06-20 | 2014-05-07 | 江苏金鹰流体机械有限公司 | Process pump for petrochemical industry |
-
2012
- 2012-06-20 CN CN 201220290032 patent/CN202659581U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734223B (en) * | 2012-06-20 | 2014-05-07 | 江苏金鹰流体机械有限公司 | Process pump for petrochemical industry |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130109 Effective date of abandoning: 20140507 |
|
| RGAV | Abandon patent right to avoid regrant |