CN212376865U - Double-screw pump with floating bush - Google Patents

Abstract

A double-screw pump with a floating bush belongs to the technical field of screw pumps; including end cover, pump end apron, the pump body, synchronous gear case, reduction gear, drive shaft and drive gear, the transmission cavity has been seted up to the inside of the pump body, the inner wall department of the pump body is provided with two sets of embedded bulge loops, the spacing groove has been seted up to the top and the bottom of the pump body. The utility model discloses an inside bush that floats that is provided with of transmission cavity, through two bush bulge loops and two embedded bulge loops mutual clearance fit on both surfaces between the bush and the pump body that float, and the junction between bush bulge loop and embedded bulge loop is provided with O type circle, and the interval between two O type circles is less, and the unsteady effect of the bush of being convenient for produces, has the cylindric lock combination of two symmetric distributions between the bush and the pump body for undertake axial force.

Description

Double-screw pump with floating bush

Technical Field

The utility model belongs to the technical field of the screw pump, specifically relate to a take double screw pump of bush that floats.

Background

The double-screw pump is characterized in that a sealed cavity with constant volume is formed between a screw sleeve and a pump body or a lining which are meshed with each other on a driving shaft and a driven shaft, media are respectively sent to the middle of the pump body along with the rotation of the screw shaft, and the media and the pump body are combined together and finally sent to an outlet of the pump.

The original double-screw pump body comprises a front-end shell, a rear-end shell, a synchronous gear box, a reduction gear box, a bushing and an end cover, wherein after a bushing bulge on the surface of the bushing is matched with connectors and through holes on the front-end shell and the rear-end shell, the bushing bulge is fixedly connected with the connectors and the through holes through a nut positioning assembly; simultaneously when inside bush need be changed, above-mentioned device need carry out whole split back, can change, operates more loaded down with trivial details.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve the technical problem that above-mentioned prior art exists, provide a take two screw pump of bush that float.

The above technical problem of the present invention can be solved by the following technical solutions: a double-screw pump with a floating bush comprises an end cover, a pump end cover plate, a pump body, a synchronous gear box, a reduction gear box, a driving shaft and a driving gear, wherein a transmission cavity is formed in the pump body, two embedded convex rings are arranged on the inner wall of the pump body, limiting grooves are formed in the top and the bottom of the pump body, penetrate through the inside of the pump body and are positioned between the two embedded convex rings, a floating bush is arranged in the pump body, two bush convex rings are arranged on the surface of the floating bush, the outer surface of each bush convex ring is in clearance fit with the inner surface of each embedded convex ring, a mounting groove is formed in each surface of each bush convex ring in an annular mode, an O-shaped ring is arranged in each mounting groove, the outer surface of the O-shaped ring is in lap joint with the inner surface of each embedded convex ring, a through groove is formed between the two bush convex rings, the top of spacing groove is pegged graft and is had the locating pin, the bottom of locating pin is pegged graft to the inside that leads to the groove, one side of the pump body is pegged graft and is had the drive shaft, the junction of drive shaft and pump body and end cover all is provided with the bearing, and the drive shaft all is provided with the machine and seals the subassembly with the both ends of pump body junction, the surface that the drive shaft pegged graft into the pump body inside is provided with screw drive portion, the surface of screw drive portion and the mutual clearance fit of the inner wall of unsteady bush.

Preferably, the top of the pump body is respectively provided with a water inlet and a water outlet, the water inlet and the water outlet penetrate through the inside of the transmission cavity, the bottom of the pump body is provided with a plurality of bases for supporting the pump body, and the driving gear is sleeved on the surface of the driving shaft and is positioned inside the reduction gear box.

Preferably, a bearing cavity for placing a bearing is arranged between the end cover and the pump end cover plate.

Preferably, the O-ring is made of rubber.

The utility model discloses beneficial effect who has: 1. the floating bush is arranged in the transmission cavity, the floating bush and the pump body are in clearance fit with each other through two bush convex rings and two embedded convex rings on the surfaces of the floating bush and the pump body, an O-shaped ring is arranged at the joint between the bush convex ring and the embedded convex ring, the distance between the two O-shaped rings is small, the floating effect of the floating bush is convenient to generate, and two symmetrically distributed cylindrical pin combinations are arranged between the bush and the pump body and used for bearing axial force; the cooperation of cylindric lock and bush is also with more cooperation, is favorable to the floating effect to produce to when wearing and tearing appear between the internals, can carry out slight replenishment to it through the floating bush, thereby can increase the life of whole device, simultaneously because whole bush is in the floating state at the during operation, can be because of the external force changes self-adjustment, avoided the influence of part manufacturing accuracy (depth of parallelism, straightness that hangs down, concentricity) to product ultimate nature to the at utmost. 2. Through being connected through the locating pin between the bush and the pump body float, and the pump body uses the whole pump body, need not carry out the split to the pump body, also need not fix with nut locating component to accelerated the installation and the dismantlement of the pump body, when changing screw drive portion simultaneously, only need pull down the end cover of its one side and can inspect and maintain receipts, faster. 3. Meanwhile, the novel floating bushing is beneficial to standardized production, is relatively independent, and can be provided with a required bushing according to different media during production, such as a wear-resistant bushing, a stainless steel bushing, a ductile iron bushing and the like.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic view of a fry configuration of the present invention;

FIG. 4 is an exploded view of the end cap, floating liner and pump body of the present invention;

FIG. 5 is an enlarged view of portion A of FIG. 2;

FIG. 6 is a schematic perspective view of a prior art twin screw pump;

FIG. 7 is an exploded view of the front end housing, liner and rear end housing of a prior art twin screw pump.

In the figure: 1. a pump body; 101. a transmission cavity; 102. a convex ring is embedded; 103. a limiting groove; 104. positioning pins; 2. an end cap; 3. a pump end cover plate; 4. a base; 5. a water inlet; 6. a water outlet; 7. a synchronous gearbox; 8. a reduction gear box; 9. a drive shaft; 10. a drive gear; 11. a bearing; 12. a machine seal assembly; 13. a screw drive section; 14. a floating liner; 141. the inner cavity of the bushing; 142. a bushing convex ring; 143. a placing groove; 144. a through groove; 145. an O-shaped ring; 15. a bearing cavity; 16. a front end housing; 17. a rear end housing; 18. a synchronous gearbox; 19. the bush is raised; 20. a reduction gear box; 21. an end cap; 22. a connector; 23. a through hole; 24. a bushing; 25. nut positioning assembly.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example (b): a double-screw pump with a floating bush is shown in figures 1-5 and comprises an end cover 2, a pump end cover 2 plate, a pump body 1, a synchronous gearbox 7, a reduction gearbox 8, a driving shaft 9 and a driving gear 10, wherein a transmission cavity 101 is arranged inside the pump body 1, two embedded convex rings 102 are arranged on the inner wall of the pump body 1, limiting grooves 103 are arranged at the top and the bottom of the pump body 1, the limiting grooves 103 penetrate into the pump body 1 and are positioned between the two embedded convex rings 102, a floating bush 14 is arranged inside the pump body 1, two bush convex rings 142 are arranged on the surface of the floating bush 14, the outer surface of each bush convex ring 142 is in clearance fit with the inner surface of each embedded convex ring 102, after the two bush convex rings are arranged in an aligned mode, a mounting groove 143 is annularly arranged on the surface of each bush convex ring 142, an O-shaped ring 145 is arranged inside the mounting groove 143, and the O, the outer surface of O type ring 145 and the internal surface of embedded bulge loop 102 overlap joint each other, be formed with logical groove 144 between two bush bulge loops 142, logical groove 144 communicates with each other with spacing groove 103, the top of spacing groove 103 is pegged graft and is had locating pin 104, the inside to leading to groove 144 is pegged graft to the bottom of locating pin 104, one side of the pump body 1 is pegged graft and is had drive shaft 9, the junction of drive shaft 9 and the pump body 1 and end cover 2 all is provided with bearing 11, and the both ends of drive shaft 9 and the junction of the pump body 1 all are provided with machine and seal subassembly 12, the surface that drive shaft 9 is pegged graft into the inside of the pump body 1 is provided with screw drive portion 13, the surface of screw drive.

The floating bush 14 is arranged in the transmission cavity 101, the floating bush 14 is in clearance fit with the pump body 1 through the two bush convex rings 142 and the two embedded convex rings 102 on the surfaces of the floating bush 14 and the pump body 1, the O-shaped ring 145 is arranged at the joint between the bush convex ring 142 and the embedded convex ring 102, the distance between the two O-shaped rings 145 is small, so that the floating effect of the floating bush 14 is generated, the bush 24 and the pump body 1 are combined by the two positioning pins 104 which are symmetrically distributed and used for bearing axial force, the matching of the positioning pins 104 and the bush 24 is beneficial to the generation of the floating effect, so when the internal parts are worn, the internal parts can be slightly supplemented through the floating bush 14, the service life of the whole device can be prolonged, meanwhile, the whole bush 24 is in a floating state during working, the self-adjustment can be realized due to the change of external force, the part manufacturing precision (parallelism degree is, perpendicularity, concentricity)) to the ultimate performance of the product, through being connected through locating pin 104 between the floating bush 14 and the pump body 1, and the pump body 1 uses the whole pump body 1, need not carry out the split to the pump body 1, also need not fix with nut locating component 25, thereby accelerated the installation and the dismantlement of the pump body 1, when changing screw drive portion 13 simultaneously, only need pull down the end cover 2 of its one side and can inspect and maintain and accept, more quick.

The top of the pump body 1 is provided with water inlet 5 and delivery port 6 respectively, and water inlet 5 and delivery port 6 run through to the inside of transmission cavity 101, and the bottom of the pump body 1 is provided with a plurality of bases 4 to its support, and drive gear 10 cup joints on the surface of drive shaft 9 and is located reduction gear box 8 inside.

A bearing 11 cavity for placing a bearing 11 is arranged between the end cover 2 and the pump end cover 2 plate.

The principle of the utility model is as follows: when the device is disassembled, the bolt connected between the end cover 2 and the pump body 1 is pulled out at the moment, so that the end cover 2 is separated from the pump body 1, then, after the two positioning pins 104 on the pump body 1 are pulled out, the floating bush 14 is separated from the inner wall of the pump body 1, and then the floating bush 14 is pulled out, since the floating bush 14 overlaps with the surface of the screw driving portion 13, so that the disengagement of the bush 24 is also facilitated, meanwhile, the new floating bush 14 is convenient to install, after the inner wall of the floating bush is sleeved on the surface of the screw transmission part 13, the shape of the outer portion thereof restrains the floating bush 14 so that alignment between the restraining groove 103 and the through groove 144 is not required, and after inserting a new floating bush 14, then, the positioning pin 104 is inserted into the limiting groove 103 and directly abuts against the bottom wall of the through groove 144, and then the new floating bush 14 is installed and replaced.

Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above-described embodiments, and many modifications are possible. Any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should be considered as belonging to the protection scope of the present invention.

Claims (4)

1. The utility model provides a twin-screw pump of bush floats in area, includes end cover, pump end cover board, the pump body, synchronous gear box, reduction gear, drive shaft and drive gear, its characterized in that: the pump comprises a pump body, a driving cavity is arranged in the pump body, two embedded convex rings are arranged on the inner wall of the pump body, limiting grooves are formed in the top and the bottom of the pump body, the limiting grooves penetrate into the pump body and are positioned between the two embedded convex rings, a floating bushing is arranged in the pump body, two bushing convex rings are arranged on the surface of the floating bushing, the outer surfaces of the bushing convex rings are in clearance fit with the inner surfaces of the embedded convex rings, a placing groove is formed in each of the surfaces of the two bushing convex rings in an annular mode, an O-shaped ring is arranged in the placing groove, the outer surface of the O-shaped ring is in lap joint with the inner surfaces of the embedded convex rings, through grooves are formed between the two sets of bushing convex rings and are communicated with the limiting grooves, a positioning pin is inserted into the top of the limiting grooves, the bottom of the positioning pin is inserted into the through, the drive shaft all is provided with the bearing with the junction of pump body and end cover, and the drive shaft all is provided with the machine with the both ends of pump body junction and seals the subassembly, the surface that the drive shaft pegged graft into the pump body inside is provided with screw drive portion, the surface of screw drive portion and the mutual clearance fit of inner wall of floating bush.

2. A twin screw pump with floating liner as defined in claim 1 wherein: the top of the pump body is provided with a water inlet and a water outlet respectively, the water inlet and the water outlet penetrate through the inside of the transmission cavity, the bottom of the pump body is provided with a plurality of bases supporting the pump body, and the driving gear is sleeved on the surface of the driving shaft and is located inside the reduction gear box.

3. A twin screw pump with floating liner as defined in claim 1 wherein: and a bearing cavity for placing a bearing is arranged between the end cover and the pump end cover plate.

4. A twin screw pump with floating liner as defined in claim 1 wherein: the O-shaped ring is made of rubber.

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