CN206636770U - A kind of twin-screw polymer delivery pump - Google Patents

Abstract

The utility model provides a kind of twin-screw polymer delivery pump,It is related to screw pump technology field,Including the pump housing,Bearing block,Driving shaft,Driven shaft,Driving shaft and driven shaft are connected by bearing block with the pump housing,The left-hand screw set and right-hand screw set of mutual cooperation are respectively arranged with the middle part of driving shaft and driven shaft,One end of driving shaft is provided with mechanical seal,The part that driving shaft and driven shaft are connected with bearing block is provided with sliding bearing,Sealing gasket is provided between sliding bearing and bearing block,The travelling gear of mutual cooperation is provided with driving shaft and driven shaft,One end of driving shaft is provided with male rotor,One end of driven shaft is provided with the spill wheel being engaged with male rotor,The technical scheme alleviates delivery pump poor sealing performance existing for prior art,The complicated technical problem of machine seal structure,Sliding bearing is realized with polymer in pump chamber to isolate,Enhance the axial seal of equipment,And then realize and reduce mechanical seal quantity,Simplify the structure of delivery pump.

Description

A kind of twin-screw polymer delivery pump

Technical field

Screw pump technology field is the utility model is related to, more particularly, to a kind of twin-screw polymer delivery pump.

Background technology

At present, the shortcomings of common polymer send complicated pump generally existing, easy leakage on the market, maintenance cost is high, Existing polymer delivery pump generally sets machine seal structure in the part frequently contacted with medium, for improving the sealing of equipment Property.

During the utility model is realized, inventor has found that at least there are the following problems in the prior art：In delivery pump Part it is poor for the sealing of medium, easily cause dielectric leakage, cause imbalance of pressure, not only have impact on delivery pump structure Stability, also reduce the conveying quality of delivery pump.And the machine envelope in delivery pump belongs to consumable accessory, existing delivery pump is generally matched somebody with somebody There are four sets of machine seal structures, machine envelope normal working life is short, and the frequency of changing machine envelope is higher, and transporting pump equipment needs when safeguarding Four sets of machine envelopes are changed, substantially increase maintenance cost.In addition, machine envelope is additionally provided with additional rinse-system, what four sets of machines sealed rushes The system of washing not only increases production cost, improves complex degree of structure, also increases maintenance difficulty.Therefore, prior art is deposited In the technical problem that delivery pump poor sealing performance, machine seal structure are complicated.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of twin-screw polymer delivery pump, existing to alleviate The complicated technical problem of delivery pump poor sealing performance present in technology, machine seal structure.

The utility model embodiment provides a kind of twin-screw polymer delivery pump, including the pump housing, bearing block, driving shaft, Driven shaft, driving shaft and driven shaft are connected by bearing block with the pump housing；It is respectively arranged with the middle part of driving shaft and driven shaft mutually The left-hand screw set and right-hand screw set of cooperation；One end of driving shaft is provided with mechanical seal；Driving shaft and driven shaft and bearing block phase The part of connection is provided with sliding bearing, and sealing gasket is provided between sliding bearing and bearing block；Set on driving shaft and driven shaft It is equipped with the travelling gear of mutual cooperation；One end of driving shaft is provided with male rotor, and one end of driven shaft is provided with and male rotor phase The spill wheel of cooperation.

The utility model embodiment provides the first possible embodiment, wherein, sliding bearing includes sliding bearing Seat and bearing shell；

Driving shaft and driven shaft are connected by bearing shell with plain bearing housing；

The stopper slot to match with plain bearing housing is offered on bearing block, plain bearing housing is fixed on limit by sealing gasket In the groove of position.

With reference to the first possible embodiment, the utility model embodiment provides second of possible embodiment, Wherein, mechanical seal includes：Mechanical sealing linkage ring, mechanical sealing static ring and stationary ring sealing gasket；

Mechanical sealing static ring is fixedly connected on bearing block by screw；

Stationary ring sealing gasket is arranged on one end away from left-hand screw set on mechanical sealing static ring, and passes through screw and mechanical seal Stationary ring is fixedly connected；

Mechanical sealing linkage ring is arranged on driving shaft, and stage clip is provided between mechanical sealing linkage ring, mechanical sealing linkage ring Sealed chamber is formed between mechanical sealing static ring.

The utility model embodiment provides the third possible embodiment, wherein, bearing block include front-end bearing pedestal and Rear bearing block, and front-end bearing pedestal and rear bearing block are connected by screw with the pump housing respectively.

With reference to the third possible embodiment, the utility model embodiment provides the 4th kind of possible embodiment, Wherein, sliding bearing includes active slip bearing and follower slip bearing；

Driving shaft is connected by active slip bearing with bearing block, including the first active slip bearing and second is actively slided Dynamic bearing, the first active slip bearing are arranged between driving shaft and front-end bearing pedestal, and the second active slip bearing is arranged at actively Between axle and rear bearing block；

Driven shaft is connected by follower slip bearing with bearing block, and follower slip bearing includes the first follower slip bearing With the second follower slip bearing, the first follower slip bearing is arranged between driven shaft and front-end bearing pedestal, the second follower slip axle Hold and be arranged between driven shaft and rear bearing block.

With reference to the 4th kind of possible embodiment, the utility model embodiment provides the 5th kind of possible embodiment, Wherein, male rotor is set between left-hand screw set and the first active slip bearing；

Spill wheel is set between right-hand screw set and the first follower slip bearing.

With reference to the first possible embodiment, the utility model embodiment provides the 6th kind of possible embodiment, Wherein, the diameter of axle end of driving shaft and driven shaft is equipped with bearing seal pad.

With reference to the first possible embodiment, the utility model embodiment provides the 7th kind of possible embodiment, Wherein, the side of plain bearing housing offers oil filler point；

Oil groove is offered on bearing block and plain bearing housing, and oil groove connects with oil filler point.

The utility model embodiment brings following beneficial effect：A kind of twin-screw that the utility model embodiment is provided Polymer delivery pump, including the pump housing, bearing block, driving shaft, driven shaft, driving shaft and driven shaft are connected by bearing block and the pump housing Connect, wherein, be respectively arranged with the middle part of driving shaft and driven shaft mutual cooperation left-hand screw set and right-hand screw set, the one of driving shaft End is provided with the part that mechanical seal, driving shaft and driven shaft are connected with bearing block and is provided with sliding bearing, sliding bearing and Sealing gasket is provided between bearing block, the travelling gear of mutual cooperation, one end of driving shaft are provided with driving shaft and driven shaft Male rotor is provided with, one end of driven shaft is provided with the spill wheel being engaged with male rotor.The technical scheme by using The technological means of sealing gasket is installed on bearing block, sliding bearing is realized and isolates with polymer in pump chamber, enhance equipment Axial seal, and then realize the purpose for reducing mechanical seal quantity, simplifies the structure of delivery pump, reduce maintenance into This.And sliding bearing enhances the steadiness connected between sliding bearing and bearing block, reduced by the way of being mounted Influence of the mechanical oscillation to structural stability when equipment works, further ensure the sealing property of equipment.

To enable above-mentioned purpose of the present utility model, feature and advantage to become apparent, preferred embodiment cited below particularly, and Accompanying drawing appended by cooperation, is described in detail below.

Brief description of the drawings

, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, describe below In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is a kind of structural representation for twin-screw polymer delivery pump that the utility model embodiment provides；

Fig. 2 is the specific knot of mechanical seal in a kind of twin-screw polymer delivery pump that the utility model embodiment provides Structure schematic diagram；

Fig. 3 is the specific knot of sliding bearing in a kind of twin-screw polymer delivery pump that the utility model embodiment provides Structure schematic diagram.

Icon：

The 100- pump housings；200- bearing blocks；210- front-end bearing pedestals；220- rear bearing blocks；300- driving shafts；310- left-hand screws Set；400- driven shafts；410- right-hand screw sets；500- mechanical seals；510- mechanical sealing linkage rings；511- stage clips；520- machineries are close Seal stationary ring；530- stationary ring sealing gaskets；600- sliding bearings；610- sealing gaskets；620- plain bearing housings；630- bearing shells；640- oil Groove；700- travelling gears；810- male rotors；820- spill wheels；900- bearing seal pads.

Embodiment

To make the purpose, technical scheme and advantage of the utility model embodiment clearer, below in conjunction with accompanying drawing to this The technical scheme of utility model is clearly and completely described, it is clear that described embodiment is that the utility model part is real Apply example, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making The every other embodiment obtained under the premise of creative work, belong to the scope of the utility model protection.

At present, the part in delivery pump is poor for the sealing of medium, easily causes dielectric leakage, causes imbalance of pressure, The stability of delivery pump structure is not only have impact on, also reduces the conveying quality of delivery pump, and machine seal structure is complicated, improves and sets Standby maintenance difficulty, based on this, a kind of twin-screw polymer delivery pump of the utility model embodiment offer, it is possible to achieve slide Bearing is isolated with medium in pump chamber, strengthens the axial seal of equipment, and then is realized and reduced mechanical seal quantity, simplifies conveying The purpose of pump configuration.

Referring to Fig. 1, a kind of structural representation for twin-screw polymer delivery pump that the utility model embodiment provides.This reality A kind of twin-screw polymer delivery pump is provided with new embodiment, including it is the pump housing 100, bearing block 200, driving shaft 300, driven Axle 400, driving shaft and driven shaft are connected by bearing block with the pump housing.Specifically, driving shaft is parallel with driven shaft to run through the pump housing, and It is fixedly connected with the bearing seat, one end of driving shaft is also connected with prime mover of device external.The utility model embodiment provides Twin-screw polymer delivery pump in, bearing block includes front-end bearing pedestal 210 and rear bearing block 220, and front-end bearing pedestal and rear bearing Seat is connected by screw with the pump housing respectively.The both sides of front-end bearing pedestal and rear bearing block offer for being connected with the pump housing respectively Mounting hole, the screwed hole to match with mounting hole is offered on the correspondence position of the pump housing, front-end bearing pedestal and rear bearing block lead to Cross screw to be fixedly connected with the pump housing, one end of front-end bearing pedestal is further opened with the through hole for installing mechanical seal.

The left-hand screw set 310 and right-hand screw set 410 of mutual cooperation, left spiral shell are respectively arranged with the middle part of driving shaft and driven shaft The transport chamber of transport polymer is formed between rotation set and right-hand screw set, driving shaft is driven by prime mover and turned round, and driven shaft is with actively Axle reversely rotates.Intermeshing and screw rod and the tight fit of lining inwall due to driving shaft and driven shaft, are being conveyed Between the suction inlet and outlet of pump, transport chamber is divided into multiple sealing spaces.With driving shaft and driven shaft rotation and Engagement, these sealing spaces are constantly formed in the suction side of pump, by suck in room it is liquid-filled wherein, and from suction side along axle To continuously elapsing to outlet side, the liquid that would be enclosed in each space is constantly discharged, and then realizes the conveying of polymer.

One end of driving shaft 300 is provided with mechanical seal 500, and referring to Fig. 2, one kind that the utility model embodiment provides is double In screw rod polymer delivery pump, the concrete structure schematic diagram of mechanical seal.Specifically, double spiral shells that the utility model embodiment provides In bar polymer delivery pump, mechanical seal 500 includes mechanical sealing linkage ring 510 and mechanical sealing static ring 520 and stationary ring sealing gasket 530.Wherein, mechanical sealing static ring is fixedly connected on bearing block by screw, the medial surface and driving shaft of mechanical sealing static ring Outer surface fit, further, on front-end bearing pedestal offer the mounting hole and screwed hole for installing mechanical seal, machinery The through hole to match with screwed hole is offered on stationary seal ring, mechanical sealing static ring is fixedly connected with front-end bearing pedestal by screw, And the groove for installing mechanical sealing linkage ring is provided between mechanical sealing static ring.

Stationary ring sealing gasket is arranged on one end away from left-hand screw set on mechanical sealing static ring, and passes through screw and mechanical seal Stationary ring is fixedly connected, and enhances the sealing property of mechanical seal, prevents the polymer of device external from flowing into device interior.

Mechanical sealing linkage ring is set on driving shaft, and its medial surface fits with driving shaft surface, and two mechanical seals Stage clip 511 is connected between the adjacent end of rotating ring, another two end and the madial wall of mechanical sealing static ring upper groove fit, and Sealed chamber is formed between mechanical sealing linkage ring and mechanical sealing static ring, enhances the sealing property of mechanical seal.

Referring to Fig. 3, the utility model embodiment provide a kind of twin-screw polymer delivery pump in, sliding bearing it is specific Structural representation.The part that driving shaft and driven shaft are connected with bearing block is provided with sliding bearing 600, and sliding bearing is support The critical piece of delivery pump driving shaft and driven shaft, sliding bearing stable working, reliable, noiseless.Under the conditions of hydrodynamic lubrication, Slidingsurface is separated without occurring directly to contact by lubricating oil, can also greatly reduce friction loss and surface abrasion, oil film is also With certain vibration absorption ability.Sealing gasket 610 is provided between sliding bearing and bearing block.

Specifically, in the twin-screw polymer delivery pump that the utility model embodiment provides, sliding bearing includes actively sliding Dynamic bearing and follower slip bearing.Active slip bearing is fixed on bearing block by screw, is fitted with the diameter of axle of driving shaft, Follower slip bearing is fixed on bearing block by screw, is fitted with the diameter of axle of driven shaft.Sliding bearing and bearing block it is interior Wall is fitted, and the outside of binding face is provided with sealing gasket, and sealing gasket is fixed by screws on bearing block, prevents pump body Polymer penetrate into the gap between sliding bearing and bearing block, realize sliding bearing and isolate with polymer in pump chamber, The sealing of sliding bearing in the axial direction is ensure that, and then realizes the purpose for reducing mechanical seal quantity, simplifies delivery pump Structure, reduce maintenance cost.

Wherein, driving shaft is connected by active slip bearing with bearing block, including the first active slip bearing and second Active slip bearing, the first active slip bearing are fixed between the driving shaft diameter of axle and front-end bearing pedestal by screw, and second actively Sliding bearing is fixed between the driving shaft diameter of axle and rear bearing block by screw.

Driven shaft is connected by follower slip bearing with bearing block, and follower slip bearing includes the first follower slip bearing With the second follower slip bearing, the first follower slip bearing is fixed between the driven shaft diameter of axle and front-end bearing pedestal by screw, the Two follower slip bearings are fixed between the driven shaft diameter of axle and rear bearing block by screw.

Specifically, in the twin-screw polymer delivery pump that the utility model embodiment provides, sliding bearing 600 includes sliding Bearing block 620 and bearing shell 630.Plain bearing housing is load-supporting part main in sliding bearing, plain bearing housing and bearing block Inner surface fits.Driving shaft and driven shaft are connected by bearing shell with plain bearing housing.The diameter of axle and axle of driving shaft and driven shaft Watt inner surface fit, the outer surface of bearing shell and the inner surface of plain bearing housing fit, the outer surface of plain bearing housing with The inwall of bearing block fits.

The stopper slot to match with plain bearing housing is offered on bearing block, plain bearing housing is fixed on limit by sealing gasket In the groove of position.The width of stopper slot and the thickness of plain bearing housing match, the one side of plain bearing housing and the inwall of bearing block Fit, sealing gasket is provided with the another side of plain bearing housing, sealing gasket is fixed by screws on bearing block.Realize Plain bearing housing is fixed between sealing gasket and bearing block, enhances the steadiness connected between sliding bearing and bearing block, drop Influence of the mechanical oscillation to structural stability during low equipment work, the sealing property of sliding bearing is further ensured, and then The mechanical seal structure of delivery pump is simplified, reduces the maintenance cost of delivery pump.

In the twin-screw polymer delivery pump that the utility model embodiment provides, the side of plain bearing housing offers oiling Oil groove 640 is offered on hole, bearing block and plain bearing housing, and oil groove connects with oil filler point.Lubricant is injected in sliding bearing Effect be to reduce frictional resistance, reduce abrasion, cooling and absorbing etc., the lubricant is liquid lubricant.

The travelling gear 700 of mutual cooperation, drive of the driving shaft in external prime mover are provided with driving shaft and driven shaft Lower rotation, by the engagement for the travelling gear being installed between driving wheel and driven pulley, drive driven pulley rotation, Jin Ershi Engaging between existing left-hand screw set and right-hand screw set, realizes the transport of polymer.

One end of driving shaft is provided with male rotor 810, and one end of driven shaft is provided with the spill wheel being engaged with male rotor 820, male rotor and spill wheel are fixed on corresponding axle by bolt respectively, prevent the male rotor during axle rotates And the skew of axial direction occurs for spill wheel, male rotor realizes driving shaft and driven shaft diametrically with spill wheel by male-female engagement Positioning, enhance the stability of structure.

Specifically, in the twin-screw polymer delivery pump that the utility model embodiment provides, male rotor is set in left-hand screw Put between one end of front-end bearing pedestal and the first active slip bearing, spill wheel is set in right-hand screw and put close to fore bearing Between one end of seat and the first follower slip bearing.The bossing of male rotor is trapezoidal, the spill wheel to match with male rotor Groove to be trapezoidal, and male rotor is coated with the plating titanium nitride of Wear-resistant corrosion-resistant with the male and fomale(M＆F) surface that spill wheel fits and made pottery Porcelain coating, the hardness of male rotor and spill wheel surface is enhanced, improve the bearing capacity of male rotor and spill wheel.

In the twin-screw polymer delivery pump that the utility model embodiment provides, the diameter of axle end dress of driving shaft and driven shaft Equipped with bearing seal pad 900.Bearing seal pad is covered in the binding face between driving shaft and the diameter of axle and sliding bearing of driven shaft Outside, realize the axial seal between driving shaft and driven shaft and sliding bearing, enhance the sealing property of equipment.

A kind of twin-screw polymer delivery pump that the utility model embodiment is provided, including the pump housing, bearing block, active Axle, driven shaft, driving shaft and driven shaft are connected by bearing block with the pump housing, wherein, the middle part of driving shaft and driven shaft is set respectively Be equipped with the left-hand screw set and right-hand screw set of mutual cooperation, one end of driving shaft be provided with mechanical seal, driving shaft and driven shaft with The part that bearing block is connected is provided with sliding bearing, is provided with sealing gasket between sliding bearing and bearing block, driving shaft and from Be provided with the travelling gear of mutual cooperation on moving axis, one end of driving shaft is provided with male rotor, one end of driven shaft be provided with The spill wheel that male rotor is engaged.The technical scheme is realized by using the technological means that sealing gasket is installed on bearing block Sliding bearing is isolated with medium in pump chamber, enhances the axial seal of equipment, and then realize and reduce mechanical seal number The purpose of amount, the structure of delivery pump is simplified, reduces maintenance cost.And sliding bearing is strengthened by the way of being mounted The steadiness that is connected between sliding bearing and bearing block, shadow of the mechanical oscillation to structural stability when reducing equipment work Ring, further ensure the sealing property of equipment.

In the description of the utility model embodiment, unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this Concrete meaning in utility model.

, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular Directly ", the orientation of the instruction such as " level ", " interior ", " outer " or position relationship are based on orientation shown in the drawings or position relationship, are only Described for the ease of description the utility model and simplifying, rather than instruction or imply signified device or element must have it is specific Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.

Finally it should be noted that：Embodiment described above, only specific embodiment of the present utility model, to illustrate this The technical scheme of utility model, rather than its limitations, the scope of protection of the utility model is not limited thereto, although with reference to foregoing The utility model is described in detail embodiment, it will be understood by those within the art that：It is any to be familiar with this skill For the technical staff in art field in the technical scope that the utility model discloses, it still can be to the skill described in previous embodiment Art scheme is modified or can readily occurred in change, or carries out equivalent substitution to which part technical characteristic；And these modifications, Change is replaced, and the essence of appropriate technical solution is departed from the spirit and model of the utility model embodiment technical scheme Enclose, should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should be wanted with the right The protection domain asked is defined.

Claims (8)

1. a kind of twin-screw polymer delivery pump, including the pump housing, bearing block, driving shaft, driven shaft, it is characterised in that the master Moving axis and the driven shaft are connected by the bearing block with the pump housing；Distinguish at the middle part of the driving shaft and the driven shaft It is provided with the left-hand screw set and right-hand screw set of mutual cooperation；One end of the driving shaft is provided with mechanical seal；The driving shaft The driven shaft and the part that the bearing block is connected are provided with sliding bearing, the sliding bearing and the bearing block it Between be provided with sealing gasket；The travelling gear of mutual cooperation is provided with the driving shaft and the driven shaft；The driving shaft One end is provided with male rotor, and one end of the driven shaft is provided with the spill wheel being engaged with the male rotor.

2. twin-screw polymer delivery pump according to claim 1, it is characterised in that the sliding bearing includes sliding axle Bearing and bearing shell；

The driving shaft and the driven shaft are connected by the bearing shell with the plain bearing housing；

The stopper slot to match with the plain bearing housing is offered on the bearing block, the plain bearing housing passes through described close Packing is fixed in the stopper slot.

3. twin-screw polymer delivery pump according to claim 2, it is characterised in that the mechanical seal includes：Machinery Moving sealing ring, mechanical sealing static ring and stationary ring sealing gasket；

The mechanical sealing static ring is fixedly connected on the bearing block by screw；

The stationary ring sealing gasket be arranged on the mechanical sealing static ring away from the left-hand screw set one end, and by screw with The mechanical sealing static ring is fixedly connected；

The mechanical sealing linkage ring is arranged on the driving shaft, and is provided with stage clip between the mechanical sealing linkage ring, described Sealed chamber is formed between mechanical sealing linkage ring and the mechanical sealing static ring.

4. twin-screw polymer delivery pump according to claim 1, it is characterised in that the bearing block includes front-end bearing pedestal And rear bearing block, and the front-end bearing pedestal and the rear bearing block are connected by screw with the pump housing respectively.

5. twin-screw polymer delivery pump according to claim 4, it is characterised in that the sliding bearing includes actively sliding Dynamic bearing and follower slip bearing；

The driving shaft is connected by the active slip bearing with the bearing block, including the first active slip bearing and Two active slip bearings, the first active slip bearing are arranged between the driving shaft and the front-end bearing pedestal, and described Two active slip bearings are arranged between the driving shaft and the rear bearing block；

The driven shaft is connected by the follower slip bearing with the bearing block, and the follower slip bearing includes first Follower slip bearing and the second follower slip bearing, the first follower slip bearing are arranged at the driven shaft and the front axle Between bearing, the second follower slip bearing is arranged between the driven shaft and the rear bearing block.

6. twin-screw polymer delivery pump according to claim 5, it is characterised in that the male rotor is set in the left side Between screw-casing and the first active slip bearing；

The spill wheel is set between the right-hand screw set and the first follower slip bearing.

7. twin-screw polymer delivery pump according to claim 2, it is characterised in that the driving shaft and the driven shaft Diameter of axle end be equipped with bearing seal pad.

8. twin-screw polymer delivery pump according to claim 2, it is characterised in that open the side of the plain bearing housing Provided with oil filler point；

Oil groove is offered on the bearing block and the plain bearing housing, and the oil groove connects with the oil filler point.