CN203175932U

CN203175932U - Petrochemical engineering process pump

Info

Publication number: CN203175932U
Application number: CN 201320074828
Authority: CN
Inventors: 陈兴; 邵雯
Original assignee: KUNMING JIAHE SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: Kunming Jiahe Industrial Equipment Co ltd
Priority date: 2013-02-18
Filing date: 2013-02-18
Publication date: 2013-09-04
Anticipated expiration: 2023-02-18

Abstract

The utility model discloses a petrochemical engineering process pump with an improved structure. The petrochemical engineering process pump is applicable to conveying various cleaning low-temperature or high-temperature, medium-pressure or high-pressure, neutral or corrosive media with higher lifts and high-lift stations. A pump suction inlet is used for fixing a sliding bearing base through a radial trisection steady flow plate. A shaft head and a sliding bearing sleeve are installed in the sliding bearing base. The Brinell hardness of the inner surface of the sliding bearing sleeve is HB400-500. The Brinell hardness of the surface of the shaft head is HB300-400. An impeller is installed between a sliding bearing of the pump suction inlet and a rolling bearing of a bearing box. A pump cover is of a clamping-cover structure. A water inlet pipe joint and a water outlet pipe joint are communicated with the clamping-cover structure of the pump cover. The petrochemical engineering process pump is simple in structure, high in efficiency, material-saving and convenient to install and maintain, and the problems that in a traditional cantilever-type process pump, radial load balance is poor, the size of a cantilever is large, the size is large, operation is unstable, vibration is large, noise is high, shaft is broken and the service life of the bearing is short are solved.

Description

A kind of petrochemical process pump

Technical field

The utility model relates to a kind of petrochemical process pump of improving the structure of structure, and this pump is applicable to carries various cleanings, low temperature or high temperature, medium-pressure or high pressure, neutrality or mordant medium.Be used for petrochemical industry, oil refinery, ethylene unit, cryogenic engineering, Coal Chemical Industry, chemical fibre and industry and fields such as general chemical flow process, power station, big-and-middle-sized heating and aircondition, environmental engineering.

Background technique

All the time, the traditional process pump that uses in industries such as petrochemical industry, oil refinery is horizontal single-stage, single suction, axially sucks, the cantilevered centrifugal pump of subdivision radially.High speed development along with petroleum chemical industry, the lift of petrochemical process pump increases to present 200 meters by original the highest 125 meters, even 250 meters, mean that impeller outer diameter increases to 400mm or 450mm by original 315mm, because the increase of impeller outer diameter, cause radial dimension to increase, the radial load that axle and bearing bear increases, and the traditional process pump is limit owing to its cantilever structure, its axial dimension is long, pump volume is big, cause the pump operation instability, vibration is big, the noise height, off-axis appears, phenomenons such as flow passage components or bearing body part damage increase operating cost.The cantilever type process pump can not satisfy the demand of petrochemical industry production technology.

Summary of the invention

The utility model purpose is to provide a kind of petrochemical process pump, it is simple in structure, the efficient height, economical with materials, installation, maintenance is convenient, has solved that the radial load balance is bad in the conventional boom-mounted process pump, the cantilever size long, volume is big, fluctuation of service, problem such as vibration is big, noise is high, off-axis, bearing life are low.

Realize that the technological scheme that the utility model above-mentioned purpose is taked is: at the fixing plain bearing housing of the stabilier of Pump Suction Nozzle by trisection radially, spindle nose and sliding bearing sleeve are packed in the plain bearing housing, the sliding bearing sleeve material can be pottery, it also can be alloy, its internal surface Brinell hardness is HB400～500, the surperficial Brinell hardness of spindle nose is HB300～400, impeller is installed between the sliding bearing of rolling bearing in the bearing housing and Pump Suction Nozzle, pump cover adopts jacket structured, advance, titting water outlet is connected the jacket structured of pump cover, when carrying high temperature or cryogenic media, by advancing, titting water outlet is introduced cooling or thermal insulation medium, avoid sealing pump cover because carrying expanding with heat and contract with cold that high temperature or cryogenic media cause, guaranteed the normal use of sealing, prolong sealing life.

The gap of spindle nose and sliding bearing sleeve is 0.10～0.15mm, the thickness of sliding bearing sleeve is 2～4mm, the plain bearing housing end has the Φ 5mm cooling hole of leading to spindle nose, and the cooling of sliding bearing, the lubricated medium that flows through by Pump Suction Nozzle are realized through this cooling hole.

Rolling bearing in the bearing housing is provided with two row, be provided with oil groove between the two bearings and be injected with lubricant oil, the oil groove position is equipped with the inside and outside spacer of bearing respectively, and the circumference uniform distribution of bearing outer separator is provided with the aperture of 6 Φ 6, the lubricated and cooling of two bearings when being convenient to pump work.

Be respectively arranged with bearing isolator at bearing housing and bearing cap, bearing isolator is arranged in the two ends of two row rolling bearings and rolling bearing is sealed in bearing housing, guaranteed that the thin oil in the bearing housing does not leak outside, external agency does not enter in the bearing housing, and sealing is reliable; Packing seal or mechanical seal are adopted in the sealing of pump cover and spindle nose.

The beneficial effects of the utility model are as follows.

1) this device is compared with traditional petrochemical process pump, structure advanced person, reliable, the generalization degree height of pump, solved the big and problem such as balance is bad, bearing seal is bad, the axial dimension that causes because of cantilever structure is big, volume big, the vibration big, noise is big of radial load, make whole pump operation reliable and stable, improve the working life of pump, also reducing owing to volume, the minimizing of material, and reduced cost significantly.

2) because sliding bearing can bear bigger radial force, impeller is arranged between sliding bearing and the rolling bearing, the impeller radial load that makes rolling bearing bear reduces greatly, reduced mechanical loss, improve the mechanical efficiency of pump, strengthened the impeller support stiffness simultaneously, reduced noise, improve product reliability.

3) the two end supports structure has shortened the pump shaft axial dimension, and economical with materials reduces processing and manufacturing difficulty, reduces pump group installing space, reaches the requirement of low-carbon economy.

4) because plain bearing housing is to be fixed in pump housing suction port place by 3 uniform gussets, be stabilier, improve import fluidised form problem of unstable, reduce prewhirling of impeller inlet simultaneously, improve hydraulic efficiency.

5) owing to adopt the double supporting structure pattern, help to control and dwindle the gap of pump housing choma and impeller port ring, reduce clearance leakage, improve the volumetric efficiency of pump.

5) pump cover is designed to jacket structuredly, when fed sheet of a media is high temperature, can cool off it; When fed sheet of a media is low temperature, can be incubated it, with protection machine envelope, the prolongation machine envelope life-span.

6) bearing housing and bearing cap are provided with bearing isolator, seal more reliable.

7) sealing of pump can adopt packing seal and two kinds of patterns of mechanical seal to satisfy requirements of different users.

Description of drawings

Below in conjunction with accompanying drawing and enforcement the utility model is done into explanation.

Fig. 1 is the structural representation of the utility model (filling-material structure).

Fig. 2 is the structural representation of the utility model (machine seal structure).

Fig. 3 is plain bearing housing radial structure schematic representation of the present utility model.

Fig. 4 is the plain bearing housing axial arrangement schematic representation of invention.

Fig. 5 is the jacket structured axial schematic representation of the pump cover of model utility.

Fig. 6 is the jacket structured radially schematic representation of the pump cover of model utility.

Fig. 7 is the axial schematic representation of bearing outer separator of model utility.

Fig. 8 is the bearing outer separator schematic representation radially of model utility.

Among the figure: 1. the pump housing 2. pump housing chomas 3. impeller port rings 4. impellers 5. sealing gaskets 6. pump covers 7. advance, titting water outlet 8. seal rings 9. packing rings 10. seal rings 11. fillers 11 12. Glands 13. axle sleeves 14. bearing outer separators 15. keys 16. spindle noses 17. bearing isolators 18. bearing caps 19. round nuts 20. legs 21. bolts 22. bearing housings 23. bearing inner spacing collars 24. rolling bearings 25. bearing isolators 26. water retaining rings 27. double-screw bolts, nut 28. double-screw bolts, nut 29. keys 30. pipe plugs 31. impeller nuts 32. plain bearing housings 33. sliding bearing sleeves 34. cooling hole 35. stabiliers, 36. oil grooves, 37. apertures.

Embodiment

As shown in the figure, at the fixing plain bearing housing 32 of the stabilier 35 of Pump Suction Nozzle by trisection radially, spindle nose 16 and sliding bearing sleeve 33 are packed in the plain bearing housing 32, sliding bearing sleeve 33 materials can be potteries, it also can be alloy, its internal surface Brinell hardness is HB400～500, the surperficial Brinell hardness of spindle nose 16 is HB300～400, impeller 4 is installed between the sliding bearing of rolling bearing 24 in the bearing housing 22 and Pump Suction Nozzle, pump cover 6 adopts jacket structured, and water-in and water-out pipe joint 7 is connected the jacket structured of pump cover 6.Spindle nose 16 is 0.10～0.15mm with the gap of sliding bearing sleeve 33, the thickness of sliding bearing sleeve 33 is 2～4mm, plain bearing housing 32 ends have the Φ 5mm cooling hole 34 of leading to spindle nose 16, and the cooling of sliding bearing, the lubricated medium that flows through by Pump Suction Nozzle are realized through this cooling hole.Rolling bearing 24 in the bearing housing 22 is provided with two row, be provided with oil groove 36 between the two bearings and be injected with lubricant oil, oil groove 36 positions are equipped with the inside and outside spacer 23 of bearing, 14 respectively, the circumference uniform distribution of bearing outer separator 14 is provided with the aperture 37 of 6 Φ 6, the lubricated and cooling of two bearings when being convenient to pump work.

Be respectively arranged with bearing

isolator

17 and 25 at bearing housing 22 and bearing cap 18, bearing

isolator

17,25 is arranged in the two ends of two row rolling bearings 24 and rolling bearing 24 is sealed in bearing housing 22, has guaranteed that the thin oil in the bearing housing does not leak outside; Pump cover 6 can adopt packing seal or mechanical seal dual mode with the sealing of spindle nose 16.

The petrochemical process pump installation method of invention is as follows: 1) bearing isolator 25 is put in the bearing housing 22; 2) rolling bearing 24 and bearing inner spacing collar 23 are contained on the spindle nose 16, load onto bearing outer separator 14 simultaneously; 3) tighten round nut 19; 4) spindle nose 16 is put into bearing housing 22; 5) bearing cap 18 that will install bearing isolator 17 is loaded on the bearing housing 22, tights a bolt; Use when 6) loading onto water retaining ring 26(sealing mechanism employing filling-material structure); 7) filling-material structure: axle sleeve 13 is loaded on the spindle nose 16, loads onto Gland 12, loads onto pump cover 6, compresses with bearing housing 22, and filler 11 and packing ring 9 are loaded onto, and compresses Gland 12; (when sealing mechanism adopted the machine seal structure: the pump cover 6 that will install axle sleeve 13, stationary seat 9, machine envelope 11, machine sealed cover 12 was loaded on the spindle nose 16, compresses with bearing housing 22); 8) install pump housing choma 2, impeller port ring 3 respectively; 9) load onto impeller 4, compress with impeller nut 31; 10) pump housing 1 be loaded on the pump cover 6 compress, spindle nose 16 pack into plain bearing housing 32 equipped good sliding bearing sleeves 33 in.

Claims

1. petrochemical process pump, it is characterized in that: at the fixing plain bearing housing of the stabilier of Pump Suction Nozzle by trisection radially, spindle nose and sliding bearing sleeve are packed in the plain bearing housing, the internal surface Brinell hardness of sliding bearing sleeve is HB400～500, the surperficial Brinell hardness of spindle nose is HB300～400, impeller is installed between the sliding bearing of rolling bearing in the bearing housing and Pump Suction Nozzle, and pump cover adopts jacket structured, and the water-in and water-out pipe joint is connected the jacket structured of pump cover.

2. by the described petrochemical process pump of claim 1, it is characterized in that: the gap of spindle nose and sliding bearing sleeve is 0.10～0.15mm, and the thickness of sliding bearing sleeve is 2～4mm, and the plain bearing housing end has the Φ 5mm cooling hole of leading to spindle nose.

3. by the described petrochemical process pump of claim 2, it is characterized in that: the rolling bearing in the bearing housing is provided with two row, be provided with oil groove between the two bearings and be injected with lubricant oil, the oil groove position is equipped with the inside and outside spacer of bearing respectively, and the circumference uniform distribution of bearing outer separator is provided with the aperture of 6 Φ 6.

4. by the described petrochemical process pump of claim 3, it is characterized in that: be respectively arranged with bearing isolator at bearing housing and bearing cap, bearing isolator is arranged in the two ends of two row rolling bearings and rolling bearing is sealed in bearing housing; Packing seal or mechanical seal are adopted in the sealing of pump cover and spindle nose.