CN209621621U - A kind of centrifugal pump - Google Patents

Abstract

The utility model discloses a kind of centrifugal pumps, it is related to equipment for liquid transportation technical field, solve the problems, such as relatively radially oversized, installation inconvenience caused by existing centrifugal pump flow passage structure, the utility model includes including pump case and impeller arranged in the pump casing, pump case bottom is equipped with support base, pump case includes the helical pipe being sequentially communicated, elbow A, axially diffuses pipeline and elbow B, pipeline is axially diffused perpendicular to impeller, impeller periphery is equipped with guide wheel, axially diffuses the pipeline section product at entrance between exit and gradually increases；The utility model is used for trandfer fluid medium, has the advantages that occupy little space, is easy for installation and efficient.

Description

A kind of centrifugal pump

Technical field

The utility model relates to equipment for liquid transportation technical fields, more particularly to a kind of centrifugal pump.

Background technique

Centrifugal pump refers to the centrifugal force by generating when impeller rotation to convey the pump of liquid, mainly by impeller, the pump housing, pump Axis, bearing, sealing ring and stuffing-box etc. are constituted.Its main feature include: it is compact-sized, flow lift range is wide, and flow is equal Even, smooth running, the installation of with small vibration and equipment, Maintenance and Repair expense are more low.The main application of centrifugal pump are as follows: for conveying clear water And physicochemical properties are used similar to other liquid of clear water, are sent suitable for industry and urban water supply and sewerage, skyscraper pressurization The cold-warm waters such as water, gardens sprinkling irrigation, fire fighting pressurization, long-distance sand transport, HVAC refrigeration cycle, bathroom are circularly-supercharged and coordinative composition of equipments, Use 80 DEG C of temperature T <；Vertical heat water (high temperature) circulating pipe pump is widely used in: the energy, metallurgy, chemical industry, weaving, papermaking, And the conveying of the boiler high temperatures hot water pressurization cycle such as hotel and urban heating system circulation pump, hot-water type use temperature T 120 DEG C of <, high temperature modification uses 240 DEG C of temperature T <；Stainless steel chemical industry pipeline pump is free of solid particle for conveying, has corrosion Property, viscosity is similar to the liquid of water, is suitable for the portions such as petroleum, chemical industry, metallurgy, electric power, papermaking, food pharmaceutical and synthetic fibers Door is -20 DEG C -120 DEG C using temperature；Pipeline oil pump-type, for the oil products such as gasoline feed, kerosene, diesel oil, transported medium Temperature is -20 DEG C -120 DEG C.

In conclusion centrifugal pump purposes is very extensive, but because flow passage structure leads to centrifugal pump relatively radially size mistake Greatly, installation is inconvenient.

Utility model content

The purpose of this utility model is that: in order to solve caused by existing centrifugal pump flow passage structure relatively radially size mistake Greatly, the inconvenient problem of installation, the utility model provide a kind of with new flow passage structure and efficient centrifugal pump.

The utility model specifically uses following technical scheme to achieve the goals above:

A kind of centrifugal pump, including pump case and impeller arranged in the pump casing, the pump case bottom are equipped with support base, the pump case Including be sequentially communicated helical pipe, elbow A, axially diffuse pipeline and elbow B, the pipeline that axially diffuses is perpendicular to leaf Wheel, the impeller periphery are equipped with guide wheel, and the pipeline section product axially diffused at entrance between exit gradually increases. Axially diffusing pipeline can reduce longitudinal volume, save space；The energy loss that pipeline reduces gravity is axially diffused, is increased Extension pressur efficiency.If keeping the diffusion ability same with existing radial diffusion pipeline, diffusion distance can reduce, save diffuser pipe The length in road；If keeping the diffusion distance same with existing radial diffusion pipeline, lift can be increased, improve working efficiency.

Further, the pipeline that axially diffuses is connected in the suction inlet side far from impeller with helical pipe.It is axial to expand Separate tube road and pump shaft of centrifugal pump share the same space, further save occupied area.

Further, the cut water extended in helical pipe is equipped in the elbow A.The cut water for protruding into helical pipe, subtracts The probability for going out mixed flow between stream and helical pipe mainstream at few impeller, to reduce hydraulic loss.

Further, the guide wheel includes upper ring and lower ring, and upper ring and lower interannular circumferentially have multiple water conservancy diversion along impeller Plate, the baffle surface is three-dimension curved surface and its guiding is opposite with impeller direction of rotation.Deflector can precisely lead fluid Enter in helical pipe, and the guiding opposite with impeller direction of rotation ensure that the pressurization distance of deflector exit fluid.

Further, the guide wheel is hollow disc, sets impeller in the hollow disc, the internal diameter of the hollow disc with The impeller outer diameter matches, and is equipped with pre- pressurization runner, the runner of the pre- pressurization runner in impeller periphery on the hollow disc It is oriented to impeller direction of rotation on the contrary, the cross section of fluid channel product of the pre- pressurization runner is gradually increased from inlet to exit.In advance It is pressurized the pre- pressurization that runner realizes fluid, has saved the length for axially diffusing pipeline.

Further, the outlet of the elbow B is connected with outlet conduit.

The beneficial effects of the utility model are as follows:

1, the utility model pump case bottom be equipped with support base, the pump case include the helical pipe being sequentially communicated, elbow A, Pipeline and elbow B are axially diffused, for the pipeline that axially diffuses perpendicular to impeller, the impeller periphery is equipped with guide wheel, the axis It is gradually increased to the pipeline section product between diffuser inlet and exit.Axially diffusing pipeline can reduce longitudinal volume, Save space；The energy loss that pipeline reduces gravity is axially diffused, extension pressur efficiency is increased.If keeping with existing radial diffusion The same diffusion ability of pipeline then can reduce diffusion distance, save the length of diffusion pipeline；If keeping with existing radial diffusion The same diffusion distance of pipeline can then increase lift, improve working efficiency.

2, the utility model axially diffuses pipeline and is connected in the suction inlet side far from impeller with helical pipe.It axially diffuses Pipeline and pump shaft of centrifugal pump share the same space, further save occupied area.

3, the cut water extended in helical pipe is equipped in the utility model elbow A.The cut water of helical pipe is protruded into, is reduced The probability for going out mixed flow between stream and helical pipe mainstream at impeller, to reduce hydraulic loss.

4, the utility model guide wheel includes upper ring and lower ring, and upper ring and lower interannular circumferentially have multiple water conservancy diversion along impeller Plate, the baffle surface is three-dimension curved surface and its guiding is opposite with impeller direction of rotation.Deflector can precisely lead fluid Enter in helical pipe, and the guiding opposite with impeller direction of rotation ensure that the pressurization distance of deflector exit fluid.

5, the utility model guide wheel is hollow disc, sets impeller in the hollow disc, the internal diameter of the hollow disc with The impeller outer diameter matches, and is equipped with pre- pressurization runner, the runner of the pre- pressurization runner in impeller periphery on the hollow disc It is oriented to impeller direction of rotation on the contrary, the cross section of fluid channel product of the pre- pressurization runner is gradually increased from inlet to exit.In advance It is pressurized the pre- pressurization that runner realizes fluid, has saved the length for axially diffusing pipeline.

Detailed description of the invention

Fig. 1 is the schematic perspective view of the utility model part section；

Fig. 2 is the planar structure schematic diagram of the utility model part section；

Fig. 3 is the structural schematic diagram of the guide wheel of embodiment 2；

Appended drawing reference: 1- pump case, 1-1- helical pipe, 1-2- elbow A, 1-21- cut water, 1-3- axially diffuse pipeline, 1- 4- elbow B, 2- impeller, 3- guide wheel, the upper ring of 3-1-, ring under 3-2-, 3-3- deflector, 3-4- are pressurized runner, 4- support base in advance.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.

Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all Belong to the range of the utility model protection.

It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.In addition, term " the One ", " second " etc. is only used for distinguishing description, is not understood to indicate or imply relative importance.

In the description of the utility model embodiment, it should be noted that the instructions such as term "inner", "outside", "upper" Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings or when utility model product use usually puts The orientation or positional relationship put, is merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion is signified Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this is practical Novel limitation.

Embodiment 1

As shown in Fig. 1 to 3, the present embodiment provides a kind of centrifugal pumps, the impeller 2 including pump case 1 and in pump case 1, institute 1 bottom of pump case is stated equipped with support base 4, it is characterised in that: the pump case 1 includes helical pipe 1-1, the elbow A1- being sequentially communicated 2, pipeline 1-3 and elbow B1-4, the suction inlet side for axially diffusing pipeline 1-3 in separate impeller 2 and leaf are axially diffused Wheel 2 is vertical and is connected to by elbow A1-2, and 2 periphery of impeller is equipped with guide wheel 3, it is described axially diffuse the inlet pipeline 1-3 and Pipeline section product between exit gradually increases, and the cut water 1-21 extended in helical pipe 1-1 is equipped in the elbow A1-2, The outlet of the elbow B1-4 is connected with outlet conduit.

Before being centrifuged pump work, trandfer fluid will be filled in centrifugal pump casing 1, opening driving device makes 2 high speed rotation of impeller, High-speed rotating fluid is thrown away by inertia along the tangent line that impeller 2 exports, and fluid enters helical pipe 1- via 3 water conservancy diversion of guide wheel 1, then fluid entrance axially diffuses pipeline 1-3 and carries out deceleration pressurization, finally enters outlet conduit via elbow B1-4.

Embodiment 2

As shown in Figure 1, Figure 3, the present embodiment is further improved on the basis of embodiment 1, the specifically described guide wheel 3 Including upper ring 3-1 and lower ring 3-2, circumferentially there are multiple deflector 3-3 along impeller 2 between upper ring 3-1 and lower ring 3-2, it is described to lead Flowing plate surface is three-dimension curved surface and its guiding is opposite with 2 direction of rotation of impeller.

Embodiment 3

As shown in Fig. 1 to Fig. 2, the present embodiment is further improved on the basis of embodiment 1 and embodiment 2, specifically Be the guide wheel 3 it is hollow disc, impeller 2, the internal diameter of the hollow disc and 2 outer diameter of impeller is set in the hollow disc Matching is equipped with pre- pressurization runner 3-4 in 2 periphery of impeller on the hollow disc, the runner guiding of the pre- pressurization runner 3-4 with 2 direction of rotation of impeller is on the contrary, the cross section of fluid channel product of the pre- pressurization runner 3-4 is gradually increased from inlet to exit.It is pre- to increase It presses runner 3-4 to realize the pre- pressurization of fluid, has saved the length for axially diffusing pipeline 1-3.

Claims (6)

1. a kind of centrifugal pump, including pump case (1) and the impeller (2) being set in pump case (1), pump case (1) bottom is equipped with support Seat (4), it is characterised in that: the pump case (1) includes the helical pipe (1-1) being sequentially communicated, elbow A (1-2), axially diffuses pipe Road (1-3) and elbow B (1-4), perpendicular to impeller (2), impeller (2) periphery is equipped with the pipeline (1-3) that axially diffuses Guide wheel (3), the pipeline section product for axially diffusing pipeline (1-3) between inlet and exit gradually increase.

2. centrifugal pump according to claim 1, it is characterised in that: the pipeline (1-3) that axially diffuses is far from impeller (2) Suction inlet side be connected to helical pipe (1-1).

3. centrifugal pump according to claim 1, it is characterised in that: be equipped in the elbow A (1-2) and extend to helical pipe Cut water (1-21) in (1-1).

4. centrifugal pump according to claim 1, it is characterised in that: the guide wheel (3) includes upper ring (3-1) Ji Xiahuan (3- 2), circumferentially there is multiple deflectors (3-3) along impeller (2) between upper ring (3-1) Ji Xiahuan (3-2), the baffle surface is Three-dimension curved surface and its guiding is opposite with impeller (2) direction of rotation.

5. centrifugal pump according to claim 1, it is characterised in that: the guide wheel (3) is hollow disc, the hollow disc Inside set impeller (2), the internal diameter of the hollow disc is matched with the impeller (2) outer diameter, on the hollow disc impeller (2) outside It encloses and is equipped with pre- pressurization runner (3-4), the runner of pre- pressurization runner (3-4) is oriented to impeller (2) direction of rotation on the contrary, described The cross section of fluid channel product of pre- pressurization runner (3-4) is gradually increased from inlet to exit.

6. centrifugal pump according to claim 1, it is characterised in that: the outlet of the elbow B (1-4) is connected with outlet pipe Road.