CN204677427U - The laggard short that ejects lubricates three screw pump - Google Patents
The laggard short that ejects lubricates three screw pump Download PDFInfo
- Publication number
- CN204677427U CN204677427U CN201520175912.2U CN201520175912U CN204677427U CN 204677427 U CN204677427 U CN 204677427U CN 201520175912 U CN201520175912 U CN 201520175912U CN 204677427 U CN204677427 U CN 204677427U
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- pump
- screw
- lining
- screw rod
- pump housing
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Abstract
The utility model relates to a kind of laggard short that ejects and lubricates three screw pump, comprise the pump housing, contain the lining of initiatively screw rod and driven screw and be arranged on the Stuffing box of the pump housing and lining one end, be characterised in that: the described pump housing the other end is provided with pump inlet, pump discharge is set at pump housing top, described pump inlet direct UNICOM fuel tank; The axial length of described active screw rod, driven screw and lining is 120-265mm, the driven screw that the active screw rod and two of described convex-concave balancing drum wedging is arranged symmetrically with is included in and crosses in lining three hole of return tube, active screw rod is provided with rolling bearing and mechanical seal, and lubricating cup is equipped with at Stuffing box top.Advantage is: designs simplification, lightweight, installing space is little and easy to maintenance, safe and reliable and import and export the mouth of pipe meet API614,676 standard-requireds, the function oil system of suitable especially supporting various employing System Design standard made in Great Britain and theory, is applied in petrochemical industry, metallurgy, power industry and all kinds of mechanical device export project.
Description
Technical field
The utility model belongs to positive displacement screw pump manufacturing technology field, particularly relates to a kind of laggard short that ejects and lubricates three screw pump.
Background technique
At present, in petrochemical industry, metallurgical, in the various function oil system such as power industry export project, traditional three screw pump continues to use metric system design standard and the theories such as DIN, the import and export mouth of pipe of pump adopts NPS1.25 mostly, 2.5, the steel pipe flanges of 5 inches and need safety valve be configured, pump inlet need configure additional line system and filter plant when connecting fuel tank, therefore cause the structure relative complex of three screw pump and component are various, inertia is large, installation form is dumb and high to spatial requirement, component matching gap is little, dismounting service technique requires higher, seal leakage phenomenon generally etc.Said structure feature causes three screw pump boundary dimension and weight is large, installation and maintenance are difficult, expend that raw material are many, manufacture cost is high and the manufacture cycle long, be not suitable for batch production.
Summary of the invention
The utility model for solve in known technology the technical problem that exists and provide a kind of designs simplification, lightweight, installing space little, easy to maintenance, safe and reliable and applied widely laggardly eject short lubrication three screw pump.
The technological scheme that the utility model is taked for the technical problem existed in solution known technology is:
The laggard short that ejects lubricates three screw pump, comprise the pump housing, contain the lining of initiatively screw rod and driven screw and be arranged on the Stuffing box of the pump housing and lining one end, it is characterized in that: the described pump housing the other end is provided with pump inlet, pump discharge is set at pump housing top, described pump inlet direct UNICOM fuel tank; The axial length of described active screw rod, driven screw and lining is 120-265mm, the driven screw that the active screw rod and two of described convex-concave balancing drum wedging is arranged symmetrically with is included in and crosses in lining three hole of return tube, active screw rod is provided with rolling bearing and mechanical seal, and lubricating cup is equipped with at Stuffing box top.
The utility model can also adopt following technological scheme:
Described pump inlet and the pump discharge mouth of pipe all adopt welding neckflange structure, and flange facing is convex surface, and flange welding end external diameter is pipe external diameter made in Great Britain.
Described mechanical seal rear portion is provided with and can prevents mechanical seal external leakage and dust-proof outside framework oil seal.
The interior hexagonal flush end Cock screw can monitoring mechanical seal leakage situation is equipped with in described Stuffing box bottom.
The advantage that the utility model has and good effect are: because the utility model adopts technique scheme, namely laggard eject short lubrication three screw pump import and export arrangement be laggard ejecting, pump inlet is without the need to configuring additional line system and filter plant direct connection fuel tank, and pump discharge can save the installing space of user at pump housing top.The steel pipe flanges that the mouth of pipe imported and exported by pump meets API614,676 standard-requireds.The pump housing adopts open type welded structure, horizontal footing install and do not arrange safety valve, meets System Design standard made in Great Britain about the design concept protecting the safe operation of pump to be born by pipeline safety valve in function oil system.Three screw pump adopts short optimal design, shortens 45% screw rod active section length by a certain percentage, and boundary dimension and weight reduce, and saves raw material, energy-saving and cost-reducing, the manufacturing cycle is short and cost is low.The driven screw adopting the active screw rod and two of convex-concave balancing drum wedging to be arranged symmetrically with is included in the form of crossing in lining three hole of return tube, and structure is reliable and assembling is easy.Stuffing box and protecgulum become one, the loop that inner spill port and the return tube crossing lining form compares that the low-pressure balance oil return line of traditional three screw pump complexity is simple and compact for structure eliminates scavenger valve assembly simultaneously, oil return very unobstructed is made to carry high viscosity medium, avoid traditional three screw pump little due to component matching gap, cause the obstructed even blocking of medium oil return to cause internal pressure to raise and local pyrexia etc. can endanger the phenomenon that pump runs well.Arrange at mechanical seal rear portion and prevent mechanical seal external leakage and dust-proof outside framework oil seal, the lubricating cup both arranged by Stuffing box top adds grease lubrication outside framework oil seal simultaneously by hexagonal flush end Cock screw monitoring mechanical seal leakage situation in dividing into.The black box that Stuffing box, rolling bearing, mechanical seal, outside framework oil seal, gasket seal and fastening piece form all can be used, and meets seriation, standardization, unitized requirement; Manufacturing cycle is short and cost is low, and very suitable batch is produced.Therefore the laggard function oil system ejecting the very suitable supporting various employing System Design standard made in Great Britain of short lubrication three screw pump and theory, is applied in petrochemical industry, metallurgy, power industry and all kinds of mechanical device export project.
Accompanying drawing explanation
Fig. 1 is plan view of the present utility model;
Fig. 2 is left view of the present utility model;
Fig. 3 is plan view of the present utility model.
In figure: 1, the pump housing; 1-1 pump inlet; 1-2, pump discharge; 2, lining; 3, active screw rod; 4, driven screw; 5, Stuffing box; 6, rolling bearing; 7, mechanical seal; 8, outside framework oil seal; 9, return tube; 10, lubricating cup; 11, supporting bead; 12, circlip for shaft; 13, gasket seal; 14, fastening screw trip bolt; 15, drainage plug screw; 16, interior hexagonal flush end Cock screw.
Embodiment
For summary of the invention of the present utility model, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1-Fig. 3,
The laggard short that ejects lubricates three screw pump, comprise the pump housing 1, contain the lining 2 of initiatively screw rod 3 and driven screw 4 and be arranged on the Stuffing box 5 of the pump housing and lining one end, the described pump housing the other end is provided with pump inlet 1-1, arranges pump discharge 1-2 at pump housing top, described pump inlet direct UNICOM fuel tank.The axial length of described active screw rod, driven screw and lining is 120-265mm, the driven screw that the active screw rod and two of described convex-concave balancing drum wedging is arranged symmetrically with is included in and crosses in lining three hole of return tube, described active screw rod 3 is installed rolling bearing 6 and mechanical seal 7; Described Stuffing box 5 top arranges lubricating cup 10, and Stuffing box bottom is provided with interior hexagonal flush end Cock screw 16, connects the pump housing 1, lining 2 and gasket seal 13 successively by fastening screw trip bolt 14.
In the present embodiment, the described pump housing 1 adopts open type welded structure, horizontal footing install and do not arrange safety valve, and import is without the need to configuring additional line system and filter plant direct connection fuel tank, only arranging one group of drainage plug screw 15 and packing ring for simplification component reduce leakage point simultaneously.
In the present embodiment, described three screw pump adopts short optimal design, and initiatively the axial length of screw rod 3, driven screw 4 and lining 2 is preferably 176mm, shortens 45% screw rod active section length by a certain percentage.
In the present embodiment, adopt convex-concave balancing drum wedging constitutional balance axial force in the middle part of described active screw rod 3 with driven screw 4 tail end, be initiatively provided with flange-type balancing drum in the middle part of screw rod 3, driven screw 4 tail end is provided with recessed edge type balancing drum.
In the present embodiment, described pump inlet and the pump discharge mouth of pipe all adopt welding neckflange structure, and its sealing surface is convex surface, and flange welding end external diameter is pipe external diameter made in Great Britain.
In the present embodiment, described rolling bearing 6 is by pumped medium self oiling, inner ring leans on active screw rod 3 shaft shoulder and circlip for shaft 12 and supporting bead 11 to realize bilateral axial restraint, and the annular groove that outer ring is arranged by lining 2 afterbody and Stuffing box 3 front portion realizes bilateral axially locating.
In the present embodiment, the spill port of described Stuffing box 5 inside forms low-pressure balance oil return line with the return tube 9 crossing lining 2, and the oil return making the medium in Stuffing box 5 happy is to screw pump snout cavity.
In the present embodiment, described mechanical seal 7 rear portion is arranged for preventing mechanical seal external leakage and dust-proof outside framework oil seal 8, and the lubricating cup both arranged by Stuffing box 5 top adds grease lubrication outside framework oil seal 8 monitors mechanical seal simultaneously leakage situation with hexagonal flush end Cock screw 16 in dividing into.
Operating principle of the present utility model is:
This laggard short that ejects lubricates three screw pump, for carrying lubricity medium, is mainly all kinds of not containing abrasion impurity and to the non-corrosive each class lubricating oil of pumping element.When active screw rod rotates under power drive and drives the driven screw be engaged with to rotate, screw spiral section is divided into several active chambers.Along with bolt rotary, the active chamber of each spiral channel-shaped constantly from pump inlet chamber to the transfer of outlet plenum side, and makes the not Operating In Persistent Current Mode chamber volume communicated with snout cavity constantly increase, and produces imbibition, make working chamber volume be increased to maximum value, become Operating In Persistent Current Mode chamber.Move with to pump oral cavity identical along axis, form again not Operating In Persistent Current Mode chamber, its volume is constantly reduced, carries out hydraulic fluid, thus realize the continuous boosting conveying of liquid.Initiatively adopts convex-concave balancing drum wedging balancing axial thrust with driven screw tail end in the middle part of screw rod and rolling bearing leans on pumped medium self oiling.After a small amount of high-pressure medium in outlet plenum infiltrates Stuffing box lubrication rolling bearing and mechanical seal by the convex-concave balancing drum gap of initiatively screw rod and driven screw wedging, flow back to snout cavity by the inner spill port of Stuffing box and the return tube that crosses lining successively.
The embodiment that the utility model accompanying drawing describes is exemplary, only for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Claims (4)
1. the laggard short that ejects lubricates three screw pump, comprise the pump housing, contain the lining of initiatively screw rod and driven screw and be arranged on the Stuffing box of the pump housing and lining one end, it is characterized in that: the described pump housing the other end is provided with pump inlet, pump discharge is set at pump housing top, described pump inlet direct UNICOM fuel tank; The axial length of described active screw rod, driven screw and lining is 120-265mm, the driven screw that the active screw rod and two of convex-concave balancing drum wedging is arranged symmetrically with is included in and crosses in lining three hole of return tube, active screw rod is provided with rolling bearing and mechanical seal, and lubricating cup is equipped with at Stuffing box top.
2. the laggard short that ejects according to claim 1 lubricates three screw pump, and it is characterized in that: described pump inlet and the pump discharge mouth of pipe all adopt welding neckflange structure, flange facing is convex surface, and flange welding end external diameter is pipe external diameter made in Great Britain.
3. the laggard short that ejects according to claim 1 lubricates three screw pump, it is characterized in that: described mechanical seal rear portion is provided with and can prevents mechanical seal external leakage and dust-proof outside framework oil seal.
4. the laggard short that ejects according to claim 1 lubricates three screw pump, it is characterized in that: the interior hexagonal flush end Cock screw can monitoring mechanical seal leakage situation is equipped with in described Stuffing box bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520175912.2U CN204677427U (en) | 2015-03-26 | 2015-03-26 | The laggard short that ejects lubricates three screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520175912.2U CN204677427U (en) | 2015-03-26 | 2015-03-26 | The laggard short that ejects lubricates three screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204677427U true CN204677427U (en) | 2015-09-30 |
Family
ID=54177123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520175912.2U Expired - Fee Related CN204677427U (en) | 2015-03-26 | 2015-03-26 | The laggard short that ejects lubricates three screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204677427U (en) |
-
2015
- 2015-03-26 CN CN201520175912.2U patent/CN204677427U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 Termination date: 20180326 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |