CN202266415U - Compound balance type single-suction double-screw pump - Google Patents
Compound balance type single-suction double-screw pump Download PDFInfo
- Publication number
- CN202266415U CN202266415U CN201120356301XU CN201120356301U CN202266415U CN 202266415 U CN202266415 U CN 202266415U CN 201120356301X U CN201120356301X U CN 201120356301XU CN 201120356301 U CN201120356301 U CN 201120356301U CN 202266415 U CN202266415 U CN 202266415U
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- Prior art keywords
- screw rod
- thrust
- screw
- end cover
- bulge loop
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Abstract
The utility model relates to a compound balance type single-suction double-screw pump, which comprises a pump body, a driving screw, a driven screw, a front end cover and a rear end cover. One end of the driving screw extends out of the front end cover, a balance protrusion ring is arranged at the matching position of the driving screw and the front end cover, a bearing is arranged on the driving screw arranged on the outer side of the balance protrusion ring through a bearing support, a thrust concave ring is arranged in the radial direction of the thrust convex block at the other end of the driving screw, a thrust convex ring is arranged on the driven screw corresponding to the thrust convex block, the thrust convex ring is correspondingly matched with the thrust concave ring and arranged in the rear end cover, a shaft sleeve is sleeved at the end portion of the driven screw on the outer side of the thrust convex ring, semispherical protrusions are arranged on the outer end face of the shaft sleeve, the semispherical protrusions of the shaft sleeve are in contact with the inner end face of the rear end cover, and the other end of the driven screw is in a cantilever shape. The thrust convex ring and the thrust concave ring are correspondingly matched through hot jacket process, thereby achieving low pressure self balance of the driving screw and high pressure self balance of the driven screw, simplifying structure, reducing axial force stressed on the driving screw, and prolonging service life.
Description
Technical field
The utility model belongs to the screw pump technical field, is specifically related to the single suction two screw pump.
Background technique
At present, single suction twin-screw pump structure is in the hole of a pair of screw rod neck bush 2 that is installed in the pump housing 1, sees Fig. 2.Initiatively screw rod 3 is the protruding spiral of double end, and driven screw rod 4 is three recessed spirals.On the driving and driven screw rod a pair of intermeshing helical gear arranged, the axial position of driven screw rod is fixing by being assemblied in the terminal pair of removable helical gear of two screw rods 15, and the total axial force that therefore acts on two screw rods is all born by the active screw rod.The screw axial equilibrium of forces is will get rid of among the high-pressure medium introducing screw rod back space B of chamber A through pump housing inner passage, comes balancing axial thrust through the pressure difference at forward horizontal stand piston and back balance piston two ends.Forward and backward equalizing piston place has sliding bearing 11 and 13 to play a part the throttling medium from hyperbaric chamber inflow low pressure chamber; Radial ball bearing 9 bears the residue axial force and plays fixedly mobile jib axial position; Owing to sliding bearing 11 and 13 before and after the reason of processing and assembly precision also is to let out part in the pump; Cause pump duty not enough, influence volumetric efficiency.The problem that single suction two screw pump structure exists is: 1. in the market the component of single suction two screw rods pump are more, complex structure, because the production and the assembly precision problem of component are easy to generate noise, and underfed, volumetric efficiency is low; 2. form and position tolerance between lining 2, active screw rod 3, driven screw rod 4, front slide bearing 11, back sliding bearing 13, a pair of helical gear 15 these 6 parts and tolerance of size are because the error of processing and assembling causes " seize "; 3. screw rod is paid the axial force that receives and is acted on the radial ball bearing 9 of screw rod initiatively through thrust flanges, causes the damage of bearing, makes screw rod pay that play is logical rear end cover 14 mills backward.
Summary of the invention
Problems such as the noise that existing single suction two screw pump exists is big in order to solve, underfed, volumetric efficiency are low, the utility model provides a kind of composite balance type single suction two screw pump.
The technical solution that realizes above-mentioned purpose is following:
Composite balance type single suction two screw pump comprises the pump housing, active screw rod and driven screw rod, and initiatively the cooperation of screw rod and driven screw rod is positioned at the pump housing, and an end of the said pump housing is provided with front cover, and the other end is provided with rear end cover; The pump housing adjacent with a front cover radially side is provided with outlet, is discharge side with the corresponding pump housing of outlet; A radially side of rear end cover is provided with import, and the inner chamber of rear end cover is a suction chamber; One end of said active screw rod extends outside the front cover, and initiatively the cooperation place of screw rod and front cover is provided with the balance bulge loop, is provided with bearing through bearing support on the active screw rod in the balance bulge loop outside, and bearing support is connecting front cover; Initiatively the other end of screw rod is connecting columned thrust projection, and the footpath of thrust projection upwards is provided with the thrust scrobicular ring; The driven screw rod corresponding with the thrust projection is provided with the thrust bulge loop, thrust bulge loop and thrust scrobicular ring corresponding matching, and be positioned at rear end cover; The driven screw rod end in the thrust bulge loop outside is arranged with axle sleeve, and the middle part, exterior edge face of axle sleeve is provided with hemispherical salient point, and the hemispherical salient point of axle sleeve contacts with the interior edge face of rear end cover; The other end of driven screw rod is cantilever-shaped, and the corresponding below, outlet port that is positioned at the pump housing.
The diameter of said balance bulge loop is 1.5 times of active screw diameter, and axial width is 0.6 times of active screw diameter.
The axial middle part of said driven screw rod is provided with center hole.
The outer surface of the said pump housing is laid with the heat radiation bulge loop.
The exterior edge face of said axle sleeve is a square.
The useful technique effect of the utility model is embodied in following several aspect:
1. the pump overall structure is simplified (nearly 15 of original structure component, new structure has only 8).Pump adopts the pump housing, lining integrated design, under the prerequisite that the runnability that has satisfied screw pump requires, changes the traditional screw supporting way; Cancel four axle sleeve dual-supportings (directly supporting) by " ∞ " word hole of housing; Reduced leakage point, the convex thrust flanges on the driven screw rod adopts hot cover process, thereby simplifies the structure, processes simple; Mounting or dismounting are convenient, realized that the weight of little, the lightweight advantage new structure of pump volume pump head is merely 1/5 of existing structure;
2. the utility model pump housing material adopts aluminum alloy, improves wear resistance and seizure resistance, improve product usability, increase the service life, and enlarged the using scope of product;
The utility model initiatively screw rod adopt the low pressure self balancing, driven screw rod adopts the high pressure self balancing, reduces the axial force that screw rod initiatively receives greatly, improve product usability, increase the service life.
Description of drawings
Fig. 1 is the utility model section of structure.
Fig. 2 is existing single suction two screw pump section of structure.
Fig. 3 is the axle sleeve structure schematic representation.
Sequence number among Fig. 1: rear end cover 1, active screw rod 2, driven screw rod 3, the pump housing 4, front cover 5, bearing 6, mechanical seal ring 7, bearing support 8, balance bulge loop 9, thrust bulge loop 10, axle sleeve 11, thrust scrobicular ring 12.
Sequence number among Fig. 2: the pump housing 1, lining 2, active screw rod 3, driven screw rod 4, front cover 5, bearing support 6, sealing gland 7, mechanical seal 8, radial ball bearing 9, forward horizontal stand piston 10, front slide bearing 11, back balance piston 12, back sliding shaft sleeve 13, rear end cover 14, a pair of helical gear 15.Among Fig. 2: A is for getting rid of chamber (hyperbaric chamber), and B is screw rod back space (hyperbaric chamber).
Embodiment
In conjunction with accompanying drawing, the utility model is done explanation further through embodiment.
Referring to Fig. 1, composite balance type single suction two screw pump comprises the pump housing 4, active screw rod 2 and driven screw rod 3, and initiatively screw rod 2 is positioned at the pump housing with driven screw rod 3 cooperations, and the axial middle part of driven screw rod is provided with center hole.One end of the pump housing 4 is provided with front cover 5, and the other end is provided with rear end cover 1; The outer surface of the pump housing is laid with the heat radiation bulge loop.The pump housing 4 adjacent with front cover 5 a radially side is provided with outlet, is discharge side B with the corresponding pump housing of outlet; A radially side of rear end cover 1 is provided with import, and the inner chamber of rear end cover 1 is suction chamber A; Initiatively an end of screw rod 2 extends outside the front cover 5, and initiatively screw rod 2 is provided with balance bulge loop 9 with the cooperation place of front cover 5, and the diameter of balance bulge loop is 1.5 times of active screw diameter, and axial width is 0.6 times of active screw diameter; Be provided with bearing 6 and mechanical seal ring 7 through bearing support 8 on the active screw rod 2 in balance bulge loop 9 outsides, bearing support 8 is connecting front cover 5.Initiatively the other end of screw rod 2 is connecting columned thrust projection, and the footpath of thrust projection upwards is provided with thrust scrobicular ring 12; The driven screw rod 3 corresponding with the thrust projection is provided with thrust bulge loop 10, thrust bulge loop 10 and thrust scrobicular ring 12 corresponding matching, and be positioned at rear end cover 1.Driven screw rod 3 ends in thrust bulge loop 10 outsides are arranged with axle sleeve 11, see Fig. 3, and the exterior edge face of axle sleeve 11 is a square, and the middle part is provided with hemispherical salient point, and the hemispherical salient point of axle sleeve 11 contacts with the interior edge face of rear end cover 1; When pump turns round through preventing the spinning of axle sleeve 11 with bonnet interference spatially.The other end of driven screw rod 3 is cantilever-shaped, and the corresponding below, outlet port that is positioned at the pump housing 4.
Initiatively the axial position of screw rod 2 is to be confirmed by bearing 6, and initiatively screw rod 2 is that pressure difference through balance bulge loop 9 two ends reaches self balancing.
The axial position of driven screw rod 3 is fixing by thrust bulge loop 10; The balance of axial force of driven screw rod 3 is that the high-pressure medium of the discharge side hole through driven screw rod 3 centers is incorporated into screw rod tail; Reach axial force self-balancing through the throttling medium from the axle sleeve 11 that discharge side flows into suction chamber, axle sleeve 11 is used in masterpiece on the rear end cover 1.
Form the airtight chamber that volume is constant with 4 of the intermeshing spiral profile and the pump housings on the driven screw rod 3; Be transferred this moment and evenly get in the Seal cage continuously along screw axial after liquid gets into the pump suction chamber; Balance does not have the ground of stirring and arrives discharge side from the pump suction chamber, thereby reaches the function of carrying liquid medium.
Claims (5)
1. composite balance type single suction two screw pump comprises the pump housing, active screw rod and driven screw rod, and initiatively the cooperation of screw rod and driven screw rod is positioned at the pump housing, and an end of the said pump housing is provided with front cover, and the other end is provided with rear end cover; It is characterized in that: the pump housing adjacent with a front cover radially side is provided with outlet, is discharge side with the corresponding pump housing of outlet; A radially side of rear end cover is provided with import, and the inner chamber of rear end cover is a suction chamber; One end of said active screw rod extends outside the front cover, and initiatively the cooperation place of screw rod and front cover is provided with the balance bulge loop, is provided with bearing through bearing support on the active screw rod in the balance bulge loop outside, and bearing support is connecting front cover; Initiatively the other end of screw rod is connecting columned thrust projection, and the footpath of thrust projection upwards is provided with the thrust scrobicular ring; The driven screw rod corresponding with the thrust projection is provided with the thrust bulge loop, thrust bulge loop and thrust scrobicular ring corresponding matching, and be positioned at rear end cover; The driven screw rod end in the thrust bulge loop outside is arranged with axle sleeve, and the middle part, exterior edge face of axle sleeve is provided with hemispherical salient point, and the hemispherical salient point of axle sleeve contacts with the interior edge face of rear end cover; The other end of driven screw rod is cantilever-shaped, and the corresponding below, outlet port that is positioned at the pump housing.
2. composite balance type single suction two screw pump according to claim 1 is characterized in that: the diameter of said balance bulge loop is 1.5 times of the active screw diameter, and axial width is 0.6 times of active screw diameter.
3. composite balance type single suction two screw pump according to claim 1, it is characterized in that: the axial middle part of said driven screw rod is provided with center hole.
4. composite balance type single suction two screw pump according to claim 1, it is characterized in that: the outer surface of the said pump housing is laid with the heat radiation bulge loop.
5. composite balance type single suction two screw pump according to claim 1 is characterized in that: the exterior edge face of said axle sleeve is square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120356301XU CN202266415U (en) | 2011-09-22 | 2011-09-22 | Compound balance type single-suction double-screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120356301XU CN202266415U (en) | 2011-09-22 | 2011-09-22 | Compound balance type single-suction double-screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202266415U true CN202266415U (en) | 2012-06-06 |
Family
ID=46157213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120356301XU Withdrawn - After Issue CN202266415U (en) | 2011-09-22 | 2011-09-22 | Compound balance type single-suction double-screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202266415U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287368A (en) * | 2011-09-22 | 2011-12-21 | 黄山工业泵制造有限公司 | Composite balance single-suction double-screw pump |
| CN102829164A (en) * | 2012-09-13 | 2012-12-19 | 武汉船用机械有限责任公司 | Transmission device |
-
2011
- 2011-09-22 CN CN201120356301XU patent/CN202266415U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287368A (en) * | 2011-09-22 | 2011-12-21 | 黄山工业泵制造有限公司 | Composite balance single-suction double-screw pump |
| CN102829164A (en) * | 2012-09-13 | 2012-12-19 | 武汉船用机械有限责任公司 | Transmission device |
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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: 20120606 Effective date of abandoning: 20130724 |
|
| RGAV | Abandon patent right to avoid regrant |