Water pump with fluid director
The utility model relates to the water pump diversion technology, relates in particular to a kind of water pump with fluid director.
Water pump is the machinery of carrying liquid or making the liquid supercharging, main structure is that impeller is installed in pumping chamber, be used for the mechanical energy transmission of impeller is changed into the kinetic energy of liquid, in pumping chamber, be provided with water outlet along the flow of fluid tangent direction, the liquid impeller drives and is expressed to water outlet, enter in the pipeline along water outlet then, realize conveying and the supercharging of liquid.
In the water pump site of deployment, a lot of users wish that water pump can adapt to the operating conditions of own system, so for the operating range that enlarges some pump and the seriation of pump, usually adopt change rotating speed or these two kinds of methods of cutting impeller external diameter to realize, the former is by changing the rotating speed of pump, adjust the Operational Limits of pump, thereby adjust the operating range of water pump; The latter cuts impeller, changes the external diameter of impeller, thereby changes the operating range of water pump.But, in practical application, cut impeller outer diameter too little in order to adapt to on-the-spot operating conditions sometimes, cause impeller outlet tripping hydroecium distance bigger, as shown in Figure 1, the high-velocity fluid of impeller A the inside has bigger velocity circulation, pumping chamber can not be in time entered, between impeller and pumping chamber, around flowing, a part of power can be consumed, the operational efficiency of water pump descends, and because pumping chamber can not in time reclaim the high-velocity fluid that comes out in the impeller, the water hammer loss in the water pump runner is increased, especially when small flow, lose more seriously, influenced the efficient of water pump greatly.
Therefore, necessaryly provide a kind of new water pump to solve above-mentioned technical problem.
The model utility content
The technical problem that the utility model solves is to provide a kind of water pump, and it can improve the operational efficiency of water pump by adding fluid director in the impeller periphery.
For solving the problems of the technologies described above, the utility model adopts following technological scheme: a kind of water pump with fluid director, comprise spiral case and be positioned at the impeller of described spiral case, described water pump also comprises the fluid director that is installed on described impeller periphery, described fluid director be ring and be provided with two annular covers, choma, and some guide vanes between described two cover plates at ring edge in described cover plate.
As the further improvement of the technical program, described guide vane evenly distributes along the circumferencial direction of described cover plate.
As the further improvement of the technical program, described water pump also comprises the impeller ring between described impeller and spiral case.
As the further improvement of the technical program, the choma of described fluid director arranges from the bending of the interior ring edge of described cover plate, and this choma is located between described spiral case and the impeller ring.
Compared with prior art, the utility model water pump utilizes fluid director can improve the operational efficiency of water pump greatly, reduces the water pump volumetric loss, can in time fluid dynamic energy be transformed into pressure energy.
Description of drawings
Fig. 1 is existing water pump structure schematic representation (arrow is represented direction of flow).
Fig. 2 is the structural representation (arrow is represented direction of flow) of water pump described in the utility model.
Fig. 3 is the schematic representation of the fluid director of water pump described in the utility model.
Fig. 4 is the cross section view of the fluid director of water pump described in the utility model.
Fig. 5 is the cut-away section schematic representation of water pump described in the utility model.
See also Fig. 2 to shown in Figure 5, the utility model provides a kind of water pump 100, comprises spiral case 10, the impeller 20 in described spiral case 10, is installed on fluid director 30 and the impeller ring 40 between described impeller 20 and spiral case 10 of described impeller periphery.Described spiral case 10 is welded by corrosion resistant plate, is provided with a pumping chamber 11 and an exhaust port 12 in it, is provided with a cut water 13 between described pumping chamber 11 and the described exhaust port 12.
See also Fig. 3 to shown in Figure 5, described fluid director 30 is ring, and be provided with two annular covers 31, choma 32, and some guide vanes 33 between described two cover plates 31 at ring edge in described cover plate.The outer shroud edge of described two cover plates 31 forms the outlet A of this fluid director, the inboard entrance B that then forms described fluid director of interior ring of described two cover plates 31.Described guide vane 33 evenly distributes along the circumferencial direction of described cover plate 31, in the utility model most preferred embodiment, the quantity of described guide vane 33 is 8, and be and hold diffusion type counterclockwise, be conducive to high-velocity fluid kinetic energy and change into pressure energy, reduce the water hammer loss, after high-velocity fluid comes out from impeller 20 the insides, directly enter fluid director 30, thereby reduce volumetric loss, improve water pump efficiency.The choma 32 of described fluid director 30 arranges from the bending of the interior ring edge of described cover plate 31, and is located between described spiral case 10 and the impeller ring 40, is used for fixing described fluid director 30.
Described impeller 20 is positioned at the inboard of described fluid director 30, makes described fluid director 30 be set in the periphery of described impeller 20.Described impeller ring 40 lays respectively at the both sides of described impeller 20, is used for the effect of its sealing.
Water pump described in the utility model is double suction pump in most preferred embodiment, when impeller outer diameter be cut hour, impeller outer diameter and pumping chamber have bigger space, fluid director 30 is installed between impeller and the pumping chamber, the fluid director choma is positioned on the impeller ring external diameter anchor ring, is secured in a press, and the fluid director outlet is adjacent to pumping chamber runner sidewall, in the time of can preventing that so liquid stream from flowing through fluid director, fluid director shakes.
Certainly, fluid director 30 described in the utility model can be applied on the different pumps, and described fluid director 30 is fixed together with the pump housing, can prevent vibrations, also prevent from rotating with impeller, through the practical application surface, the fluid director 30 of the utility model water pump can reduce axial force, and it is steady to be conducive to water pump operation.
The working principle of the utility model water pump is specially: install a fluid director in the pumping chamber runner in spiral case additional, make the high-velocity fluid of impeller can in time enter the fluid director entrance, part kinetic energy is transformed into pressure energy in the fluid director outlet port, and then, after entering pumping chamber again, most of kinetic energy transforms substantially and finishes, thereby reduces water hammer loss and the volumetric loss of water pump, has improved the efficient of water pump.And described fluid director is installed in the pumping chamber of spiral case, not only can in time collect the energy that transforms fluid, simultaneously, also eliminates unbalanced radial force in single spiral case, reduces the suffered radial force of pump shaft, improves water pump operation stability.
In sum, water pump described in the utility model can effectively reduce the water hammer loss of pump housing pumping chamber inside, volumetric loss, widen the efficient district of water pump operation, the radial force of balancing rotor reduces mechanical friction loss, improve the operational efficiency of water pump, finally realize energy-saving and emission-reduction.
The above; it only is most preferred embodiment of the present utility model; be not that the utility model is done any pro forma restriction; any those of ordinary skill in the art; do not breaking away under the technical solutions of the utility model scope situation; utilize the method content of above-mentioned announcement that technical solutions of the utility model are made many possible changes and modification, all belong to the scope of claims protection.