The centrifugal pump of grooved wall surface
The utility model belongs to fluid machines technical field, and in particular to a kind of centrifugal pump of grooved wall surface.
For traditional centrifugal pump, under low flow rate condition, runner bucket interchannel will appear stall whirlpool, and interior flow field is opened
Beginning becomes disorderly；By the performance variation law to centrifugal pump internal flow characteristics and centrifugal pump analysis shows due to impeller into
Mouth swirling flow and blade surface separation stream cause the Severe blockage of runner, lead to the notable of centrifugal pump stall region head curve
Decline and the efficiency of small flow area reduces so that the unstable hump phenomenon of centrifugal pump occurs, and influences unit efficiency and causes
A large amount of energy consumptions, the more serious safety in operation that can influence unit.
Utility model content
The purpose of this utility model is to provide a kind of centrifugal pump of grooved wall surface, solve conventional centrifugal pump inefficiency,
And the problem that energy consumption is big.
The utility model is the technical scheme adopted is that a kind of centrifugal pump of grooved wall surface, including hollow pump case, pump case
One end be provided with conical pipe, the small-caliber end of conical pipe is connect with pump case, and the madial wall of conical pipe is axially disposed triangle
Connected in star, triangular groove include the concave surface on arc-shaped convex surface and flat type, and impeller, the center edge of impeller are provided in pump case
The relative direction of conical pipe is provided with transmission shaft, and the other end of transmission shaft is connected by the main shaft of shaft coupling and motor.
The utility model is also characterized by：
The small-caliber end of conical pipe is connect by flange with pump case, and the heavy caliber end of conical pipe is also equipped with flange.
The length of conical pipe is 0.7~0.8 times of impeller diameter.
The intersection point that two concave surfaces of triangular groove are formed to convex surface tangent line air line distance for impeller diameter 0.02~
Triangular groove is on the basis of the heavy caliber end of conical pipe, small-caliber end 2mm of the triangular groove apart from conical pipe
The angle that two concave surfaces of triangular groove are formed is 55 °~60 °.
The quantity of triangular groove is 30~40.
The utility model has the beneficial effects that：The centrifugation pump suction chamber of the utility model in conical pipe internal face by processing
To vee gutter, this vee gutter can stop and weaken suction chamber close to side-walls fluid larger rotational flow shaft,
The vortex intensity of main flow area is set to be significantly suppressed；Axially grooved technology is effectively increased the axial direction of centrifugal blade entrance
Speed inhibits impeller inlet to prewhirl, and improves the centrifugal blade angle of attack, inhibits reflux and the generation of vortex tape, is centrifuged eliminating
Centrifugal pump hump zone efficiency is improved while pumping hump phenomenon, also ensures that entire unit being capable of safe operation.
Description of the drawings
Fig. 1 is a kind of centrifugal pump structure schematic diagram of grooved wall surface of the utility model；
Fig. 2 is the triangular groove structural schematic diagram in a kind of centrifugal pump of grooved wall surface of the utility model.
In figure, 1. conical pipes, 2. triangular grooves, 3. convex surfaces, 4. concave surfaces, 5. flanges, 6. impellers, 7. transmission shafts, 8.
Axis device, 9. motors, 10. pipelines, 11. pump cases.
Specific implementation mode
The utility model is described in detail with reference to the accompanying drawings and detailed description.
A kind of centrifugal pump of grooved wall surface of the utility model, as shown in Figure 1, including hollow volute pump case 11, pump case 11
One end be provided with conical pipe 1, the small-caliber end of conical pipe 1 is connect by flange 5 with pump case 11；As shown in Fig. 2, conical pipe 1
Madial wall it is axially disposed there is triangular groove 2, triangular groove 2 to be evenly arranged along the circumferencial direction of conical pipe, triangle
Groove 2 includes the concave surface 4 on arc-shaped convex surface 3 and flat type, and 1 heavy caliber end of conical pipe is also equipped with flange 5, conical pipe 1
Heavy caliber end is connect by flange 5 with pipeline 10；Impeller 6 is provided in pump case 11, the center of impeller 6 is along 1 contra of conical pipe
To transmission shaft 7 is provided with, the other end of transmission shaft 7 is connect by shaft coupling 8 with the main shaft of motor 9；The length of conical pipe 1 is leaf
Take turns 6 diameters 0.7~0.8 times；One end of triangular groove 2 on the basis of the heavy caliber end of conical pipe 1, triangular groove 2
Small-caliber end 2mm~3mm of the other end apart from conical pipe 1, the intersection point that two concave surfaces 4 of triangular groove 2 are formed are cut to convex surface
The air line distance of line is 0.02~0.03 times of impeller diameter；The angle that two concave surfaces 4 of triangular groove 2 are formed is 55 °~
60°；And the quantity of triangular groove 2 is 30~40.
A kind of centrifugal pump of grooved wall surface of the utility model, vee gutter 2 can stop and weaken close to 1 inside of conical pipe
The rotational flow of fluid at wall, makes the vortex intensity of main flow area be significantly suppressed；Axially grooved technology be effectively increased from
Axial velocity at 6 vane inlet of heart pump impeller inhibits impeller inlet to prewhirl, and improves the centrifugal blade angle of attack, to inhibit back
The generation of stream and vortex tape eliminates centrifugal pump hump phenomenon, improves centrifugal pump hump zone efficiency.
By the above-mentioned means, a kind of centrifugal pump of grooved wall surface of the utility model, axial in 1 inside of conical pipe of centrifugal pump
Triangular groove 2 is set, eliminates centrifugal pump and unstable hump phenomenon occurs, centrifugation is substantially increased while reducing energy consumption
The efficiency of pump assembly keeps centrifugal pump group operation more safe and reliable.