CN1054186C - Water supply pump - Google Patents

Abstract

A water supply pump has a partition plate with a raised part. The drive chamber has a magnet rotatably incorporated in a rotary plate fixed to a motor shaft, and the impeller having the magnet at a lower portion of the vane is engaged with the boss, and the pump chamber has a recess integrally fixed and movable in a thrust direction. The other end surface of the rotating shaft is opposite to the center of the thrust block cover fixedly arranged at the suction inlet part with a tiny gap. The invention can use the other end surface of the rotating shaft and the thrust baffle cover to compensate the inclination of the rotating shaft, has no swing of the impeller and can stably rotate. The thrust block cover is arranged at the suction port part, so that the water suction capacity can be improved, and the miniaturization of the water feeding pump is realized.

Description

Feed water pump

The present invention relates to discharge the structure of the feed water pump of hot water.

Fig. 6 is the conventional centrifugal pump shown in the open 1993-31031 communique of Japanese patent of invention, combine through dividing plate 4 by drive chamber 2 and pump chamber 3, and this drive chamber 2 forms one with pump chamber 3 by drive chamber's shell 14 and the pump chamber shell 13 that engages on concentric circle.And, rotatable magnet 6 on the output shaft 7 that is contained in motor 5 is arranged in drive chamber 2, in pump chamber 3, then be provided with radial multi-disc blade 9, simultaneously, to be provided with the top that the impeller 8 of magnet 11 is fixed in by dividing plate 4 one sides be on the bearing 12 of spherical shape to quadrate part under blade, can move in thrust direction, and rotatable, in addition, the stationary axle of being fixed by the rib 16 of being located at suction oral area 15 10 supports above-mentioned bearing 12.Again, magnet 6 with make magnetic coupling at the magnet 11 of the opposed with it pump chamber 3 of thrust direction across aforementioned barriers 4 across dividing plate 4, when 6 rotations of the magnet on the output shaft 7 that is fixed in motor 5, the magnet 11 of opposed with it pump chamber 3 promptly rotates, along with this rotation, power is transferred to impeller 8.

According to above-mentioned structure, in case motor 5 rotations, then the magnet of being fixed on the output shaft 7 of motor 56 is promptly made magnetic coupling across dividing plate 4 with the opposed magnet 11 of thrust direction, makes impeller 8 rotations.The hot water of the internal tank that sucks from the suction port 15 of pump chamber shell 13 is promptly because the centrifugal force of impeller 8 and sending to the exhaust port that is opened in pump chamber shell 13 horizontal sides not shown in the figures.Owing to be to be rotated transmission,, and,, in the heat supply water container, use a lot so magnet also can dwindle because magnetic coupling is carried out in thrust direction so it is few to give the heat transport of motor 5 by magnetic coupling.

Again, because the magnetic coupling of 6 of the magnet of the magnet 11 of pump chamber 3 and drive chamber 2, the top that is the bearing 12 of spherical shape contacts with dividing plate 4 usually, and impeller 8 begins to rotate from such state.When improving the rotating speed of impeller 8 in order to increase discharge capacity, the interior voltage rise height of pump chamber 3, and produce back pressure in the direction that impeller 8 deviates from dividing plate 4, make impeller 8 come-ups.Along with this come-up, bearing 12 moves to the direction that sucks oral area 15, state rotation and the discharge hot water of impeller 8 to be higher than dividing plate 4.As mentioned above, when discharging hot water, pressure in the pump chamber 3 raises, impeller 8 moves to the direction of the dividing plate 4 that deviates from pump chamber 3, and in case stop the driving of motor 5, pressure in the pump chamber 3 then reduce, and the magnet 11 of pump chamber 3 is attracted each other with the magnet 6 of drive chamber 2 simultaneously, so bearing 12 tops of impeller 8 and pump chamber 3 interior dividing plates 4 contact.

According to above-mentioned structure, need be provided for supporting the rib 16 of the stationary axle 10 of impeller 8 at the suction oral area 15 of pump chamber shell 13, so just reduced the stream basal area of the suction oral area 15 of pump chamber shell 13, and the efficient of pump is reduced.Therefore, constant as the efficient that will make pump, just must enlarge the diameter that sucks oral area 15, bring restriction so not only for the configuration design of pump, it is also unfavorable to see from economic angle.Again, if do not establish rib 16, then impeller 8 can produce serious lateral oscillation, can not carry out stable rotation.

In view of above-mentioned truth, the object of the present invention is to provide a kind of lateral oscillation that does not have an impeller, can carry out stable rotation, do not reduce suction port stream basal area, the feed water pump that pump efficiency is good simultaneously.

In order to achieve the above object, technological scheme of the present invention is, a kind of feed water pump, comprise motor, be fixed in side's magnet on this motor output shaft, have and this side magnet is opposed and do magnetic-coupled the opposing party's magnet impeller, make the running shaft of one rotation at the rotating center and the above-mentioned impeller of this impeller, the dividing plate of formation pump chamber between above-mentioned side's magnet and the opposing party's magnet

It is characterized in that, the suction port of hot water is set on above-mentioned running shaft, and this suction oral area is formed the thrust pad of above-mentioned running shaft.

The present invention does the one rotation by making axle and impeller, can constitute simply with the other end opposed thrust pad of minimum tolerance with axle.Even the occasion that the axle of doing one rotation with impeller presses in pump chamber liter, impeller is subjected to back pressure and rises in the direction that deviates from dividing plate, because the other end of axle or the central part of the other end and thrust pad and neighbouringly contact rotation, so inclination that can not produce impeller, and be the inclination of proofreading and correct running shaft with running shaft other end and thrust pad, do not have waving of impeller yet, can realize stable rotation.Again, the equal opening of the part of thrust pad except that its central part can suck hot water effectively.

Below accompanying drawing is done simple declaration.

Fig. 1 is centrifugal pump one an embodiment's of the present invention sectional view.

Fig. 2 is the plan view of Fig. 1.

Fig. 3 is the another embodiment's of a centrifugal pump of the present invention sectional view.

Fig. 4 is the stereogram of thrust pad used among Fig. 3.

Fig. 5 represents the other end of running shaft of the present invention and the relation between thrust pad.

Fig. 6 is the sectional view of conventional centrifugal pump.

Below in conjunction with the description of drawings embodiments of the invention.

Fig. 1, Fig. 2 and Fig. 5 are the sectional view and the plan views of the feed water pump of expression one embodiment of the invention, with conventional example formation contrast shown in Figure 6.All, effects identical with Fig. 6 function exist together mutually and all mark with prosign among these figure.

In Fig. 1, Fig. 2 and Fig. 5, the structure of drive chamber 2 and pump chamber 3 be drive chamber's shell of on concentric circle, engaging 14 with pump chamber shell 13 the dividing plate center as concentric circle, and be boundary's formation one with dividing plate 28 to the protrusion 29 of these pump chamber 3 direction projectioies.Above-mentioned protrusion 29 forms by modes such as deep-draw processing.Rotation magnet 6 freely in the swivel plate of being fixed on the output shaft 7 of motor 5 31 is housed in the drive chamber 2, be provided with radial multi-disc blade 9 in the pump chamber 3, above-mentioned blade 9 is by being provided with recess 32 at running shaft 20 1 ends, fixedly form as one, so that the impeller 8 that is provided with magnet 11 at 9 times quadrate parts of blade can engage with the lug boss 29 of dividing plate 28 centers to pump chamber 3 direction projectioies, and can and thrust pad 25 between tolerance range in rotate.The other end 22 of running shaft 20 and be fixedly arranged between thrust pad 25 central parts 26 that suck oral area 15 opposed with minimum gap.These thrust pad 25 central parts 26 that constitute with sheet materials such as stainless steels are done to slide between face with between the minimal gap of necessity and spools 20 the other end 22, play the thrust pad effect thus.

Fig. 3 and Fig. 4 are the sectional view of feed water pump of further embodiment of this invention and the stereogram of thrust pad thereof.Among the figure, the central part that is fixedly arranged on the thrust pad 25-1 that sucks oral area 15 offers the hole 23 of inserting for the other end 21 of running shaft 20.The insertion of the other end 21 is convenient to through deburring processing in hole 23, and axle is passed.Again, frame linking portion 30 and the opening portion 27 that supports central part arranged, can easily suck hot water towards the peripheral direction of thrust pad 25-1.Adopt such structure, the gap regardless of 23 in the other end 21 and hole all can prevent waving of impeller.Make magnetic coupling at the magnet 11 of thrust direction and magnet 6 opposed pump chambers 3 across aforementioned barriers 28 across dividing plate 28, and in case be fixed in magnet 6 rotations on the output shaft 7 of motor 5, the magnet 11 of opposed with it pump chamber 3 promptly rotates, along with this rotation, power transmission is given impeller 8 and is made its rotation.

Fig. 5 represents the other end of running shaft 20 and the relation between thrust pad.In Fig. 5 a, the hemispheric other end 22-1 of running shaft 20 and 33 in the concavity portion of thrust pad 25-2 are opposed with minimum gap.Again, in Fig. 5 b, the other end 22-2 that forms after the excision on every side with the other end and 26 of the central parts of thrust pad 25 are opposed with minimum gap.Both are the thrust pad structure that slides between face.

The suction oral area 15 of pump chamber 3 inlet is looped around around the thrust pad 25-1, the minimizing of the stream basal area that causes for the area that remedies thrust pad 25-1 central part and frame linking portion 30, and the bore that sucks oral area 15 amplifies gradually, forms conical surface 24.

As mentioned above, this employing running shaft is different with the structure of establishing stationary axle at the suction oral area with the structure of impeller one rotation, can not reduce sucking oral area stream basal area.Therefore, can improve pump efficiency, and make the further miniaturization of pump, thereby improve Economy, moreover, design also is more prone to.

And, because the inclination that can remedy running shaft by the other end and the thrust pad of running shaft can be eliminated waving of impeller, obtain stable rotation.

Claims (1)

1. feed water pump, comprise motor (5), be fixed in side's magnet (6) on described motor (5) output shaft (7), have and described side's magnet (6) is opposed and make the impeller (8) of magnetic-coupled the opposing party's magnet (11), the running shaft (20) of doing the one rotation at the rotating center and the described impeller (8) of described impeller (8), the dividing plate (28) that between described side's magnet (6) and the opposing party's magnet (11), forms pump chamber (3)

It is characterized in that, be provided with the suction oral area (15) of hot water in described running shaft (20) top, and form the thrust pad (25) of described running shaft (20) towards described suction oral area (15).

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