CN211449048U - Centrifugal pump - Google Patents

Abstract

The utility model relates to a centrifugal pump, including pump case and motor, be connected with pipette and fluid-discharge tube on the pump case, the last heat dissipation runner that is equipped with of motor casing, the entry end of heat dissipation runner is connected with first takeover on one side, and first takeover on one side connects to the fluid-discharge tube, and the exit end of heat dissipation runner is connected with the other takeover of second, and the other takeover of second connects to on the pipette. Through other first side takeover that connects on the fluid-discharge tube, utilize centrifugal pump outlet pressure to guide centrifugal pump exhaust liquid partially in motor casing's heat dissipation runner, through other taking over the second side to connect to on the pipette, under the imbibition effect of centrifugal pump, can accelerate the velocity of flow of cooling liquid in the heat dissipation runner, thereby strengthen the cooling effect to motor casing, this centrifugal pump has saved the required extra motor of traditional water-cooling heat dissipation, make the overall structure of centrifugal pump simplify greatly, reduce the occupation space and the preparation and the running cost of centrifugal pump, be particularly useful for the condition such as marine water pump space is limited, do benefit to the space optimal design of ships and light boats.

Description

Centrifugal pump

Technical Field

The utility model relates to a centrifugal pump.

Background

The motor is used as a core component of centrifugal pump power, the performance requirement is high, the motor requires frequent starting and braking, and the working environment is severe. During the operation of the motor, certain energy loss inevitably occurs to components such as stator windings, and the loss is radiated outwards in the form of heat, so that the problem of temperature rise of the motor is caused. The motor works at a high temperature state for a long time, an insulation system is aged and becomes brittle, and an insulation material is carbonized, deteriorated and loses the insulation property under severe conditions, so that the motor is burnt out, and the service life of the motor is threatened.

At present, in order to solve the problem of heat dissipation of the motor, air cooling heat dissipation is mostly performed through a fan, the heat dissipation effect is poor, and foreign matters are easy to enter the motor to cause damage of the motor; common use water-cooling carries out radiating motor, the radiating effect of motor is good, and the security is high, but the circulating water that uses in the device needs extra drive arrangement to provide power, and this manufacturing cost and the running cost that has just led to the device all are higher a lot than air-cooled heat abstractor, and the water cooling plant of this kind of motor has still occupied a large amount of spaces moreover, in some special occasions, like in the aspect of marine water pump, brings very big inconvenience to the space optimal design of ship.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a centrifugal pump can solve prior art's part defect at least.

The utility model relates to a centrifugal pump, including pump case and motor, be connected with pipette and fluid-discharge tube on the pump case, be equipped with the heat dissipation runner on the motor casing, the entry end of heat dissipation runner is connected with first takeover on one side, first takeover on one side connects to on the fluid-discharge tube, the exit end of heat dissipation runner is connected with the other takeover of second, the other takeover of second connects to on the pipette.

As one embodiment, the motor housing includes an outer housing and an inner housing, the outer housing is sleeved on the inner housing so as to enclose the heat dissipation flow channel, and an inlet end and an outlet end of the heat dissipation flow channel are both located on the outer housing.

In one embodiment, the inner shell is provided with a runner groove, and the outer shell is fitted and sleeved on the inner shell and seals a notch of the runner groove to form the heat dissipation runner.

In one embodiment, the heat dissipation channel is a spiral channel.

As one embodiment, the heat dissipation flow channels have two sets and are configured as a double-spiral structure, and inlet ends of the two sets of heat dissipation flow channels are respectively located at two ends of the outer shell.

In one embodiment, the outer housing and the inner housing are welded and fixed.

In one embodiment, the centrifugal pump is a single-stage double-suction centrifugal pump, two of the suction pipes are provided, and the second bypass pipe is bypassed to one of the suction pipes.

In one embodiment, the centrifugal pump is a single-stage double-suction centrifugal pump, two corresponding liquid suction pipes are provided, two sets of heat dissipation flow passages are provided, the two first bypass pipes are both connected to the liquid discharge pipe in a bypass mode, and the two second bypass pipes are connected to the two liquid suction pipes in a bypass mode.

In one embodiment, the two sets of heat dissipation flow channels are formed in a double spiral structure.

As an embodiment, the first bypass pipe and the second bypass pipe are both copper pipes.

The utility model discloses following beneficial effect has at least:

the utility model provides a centrifugal pump, through other first side takeover that connects on the fluid-discharge tube, utilize centrifugal pump outlet pressure to guide centrifugal pump exhaust liquid partially in motor casing's heat dissipation runner, cool off motor casing, through other taking over of second to connect to on the pipette, under the imbibition effect of centrifugal pump, can accelerate the velocity of flow of cooling liquid in the heat dissipation runner, thereby strengthen the cooling effect to motor casing, this centrifugal pump utilizes self power to accomplish the effective circulation of cooling liquid in the motor casing, the required extra motor of traditional water-cooling heat dissipation has been saved, make the overall structure of centrifugal pump simplify greatly, reduce the occupation space and the preparation and the running cost of centrifugal pump, be particularly useful for the condition such as marine water pump space is limited, do benefit to the space optimization design of ships and light boats.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a centrifugal pump according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional structural diagram of a motor according to an embodiment of the present invention;

fig. 3 is a schematic view of a spiral heat dissipation channel in a motor according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention are described below clearly and completely, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the embodiment of the present invention provides a centrifugal pump, including pump case 1 and motor 2, be connected with pipette 11 and fluid-discharge tube 12 on the pump case 1, be equipped with heat dissipation runner 23 on the motor casing, the entry end of heat dissipation runner 23 is connected with first side and takes over 24, first side takes over 24 side connect to on the fluid-discharge tube 12, the exit end of heat dissipation runner 23 is connected with second side and takes over 25, second side takes over 25 side connect to on the pipette 11.

The pump casing 1 and the motor 2 are conventional devices in the art, an output shaft of the motor 2 is connected with the impeller 13 in the pump casing 1 to drive the impeller 13 to rotate, and other components and relative connection structures in the pump casing 1 are conventional in the art, and are not described herein again. The liquid (water) to be conveyed enters the pump housing 1 from the liquid suction pipe 11 and is discharged out of the pump housing 1 through the liquid discharge pipe 12.

The centrifugal pump that this embodiment provided, through by-pass first side takeover 24 on fluid-discharge tube 12, utilize centrifugal pump outlet pressure to guide centrifugal pump exhaust liquid in part to the heat dissipation runner 23 of motor casing, cool off motor casing, through by-pass second side takeover 25 to on the pipette 11, under the imbibition effect of centrifugal pump, can accelerate the velocity of flow of cooling liquid in heat dissipation runner 23, thereby strengthen the cooling effect to motor casing, this centrifugal pump utilizes self power to accomplish the effective circulation of cooling liquid in the motor casing, the required extra motor of traditional water-cooling heat dissipation has been saved, make the overall structure of centrifugal pump simplify greatly, reduce the occupation space and the preparation and the running cost of centrifugal pump, be particularly useful for the circumstances such as marine water pump space is limited, do benefit to the space optimal design of ships and boats.

Because the centrifugal pump constantly absorbs fresh liquid, and the absorption amount is generally far greater than the cooling liquid amount required by the heat dissipation and cooling of the motor shell, after the cooling liquid discharged from the heat dissipation flow channel 23 after heat exchange and temperature rise is mixed with the fresh liquid, the temperature rise of the mixed liquid is not obvious compared with the temperature rise of the fresh liquid, and therefore the centrifugal pump is still suitable for entering the heat dissipation flow channel 23 to cool the motor shell.

As a preferred solution of this embodiment, as shown in fig. 2 and 3, the motor housing includes an outer housing 22 and an inner housing 21, the outer housing 22 is sleeved on the inner housing 21 to form the heat dissipation flow channel 23, and an inlet end and an outlet end of the heat dissipation flow channel 23 are both located on the outer housing 22. In one embodiment, there is a gap between the outer shell 22 and the inner shell 21, so as to form a cylindrical water cooling channel therebetween, which has a simple structure and low design/modification cost, but the flow rate of the cooling liquid is low. In another embodiment, a flow channel groove is formed in the inner shell 21, and the outer shell 22 is fitted and sleeved on the inner shell 21 and blocks a notch of the flow channel groove so as to enclose the heat dissipation flow channel 23; obviously, it is also possible that the channel groove is opened in the outer shell 22, but the contact area between the coolant and the inner shell 21 is relatively reduced, and the cooling effect is naturally relatively reduced. Wherein, the inner wall of shell 22 and the outer wall of interior casing 21 are the laminating contact, guarantee the leakproofness of runner groove, reducible or avoid phenomenon such as series flow and seepage, in the transformation structure to current motor 2, can set up above-mentioned shell 22 and interior casing 21 welded fastening, and to the production of new design and new equipment, also can set up above-mentioned shell 22 and interior casing 21 integrated into one piece (for example 3D prints).

As shown in fig. 3, the flow channel groove is preferably a spiral groove, that is, the heat dissipation flow channel 23 is preferably a spiral flow channel, and can extend from one end of the inner housing 21 to the other end of the inner housing 21, so as to ensure the cooling effect on each area of the motor housing, and reduce the number of flow channel grooves; when one spiral groove is provided, the required cooling and heat dissipation effects can be achieved through the design of the space between two adjacent spiral channels. In another embodiment, two sets of the heat dissipation flow passages 23 are provided and the two sets of the heat dissipation flow passages 23 are formed in a double spiral structure, which provides a better cooling effect for the inner housing 21; particularly, the inlet end of one set of spiral heat dissipation flow channel 23 is located at the first end of the outer shell 22, the outlet end of the other set of spiral heat dissipation flow channel 23 is located at the second end of the outer shell 22, the outlet end of the other set of spiral heat dissipation flow channel 23 is located at the first end of the outer shell 22, namely, the flow directions of the cooling liquid in the two sets of heat dissipation flow channels 23 are opposite, the design of the heat dissipation flow channel 23 can further improve the uniformity of cooling and heat dissipation of the motor housing, and the situation that the heat dissipation effect of one end of the motor housing is stronger than that of the other end of the motor housing is avoided, so that the motor. Based on this structure, there are two first bypass pipes 24 and two second bypass pipes 25, respectively.

In a preferred scheme, the centrifugal pump is a single-stage double-suction centrifugal pump, namely, two suction pipes 11 are provided, and in the case that the heat dissipation flow passage 23 has only one group, namely, only one first bypass pipe 24 and only one second bypass pipe 25 are provided, and the second bypass pipe 25 is bypassed to one suction pipe 11; in this centrifugal pump, the amount of the cooling liquid discharged from the heat radiation flow passage 23 after the heat exchange and temperature rise is slightly smaller than the amount of the fresh liquid sucked through the two liquid suction pipes 11, and therefore the temperature change of the mixed liquid in the pump housing 1 is smaller than the temperature change of the fresh liquid, and therefore the centrifugal pump is also suitable for entering the heat radiation flow passage 23 to cool the motor housing. In the case where there are two sets of the heat dissipation flow paths 23, that is, there are two first bypass pipes 24 and two second bypass pipes 25, both the first bypass pipes 24 are bypassed to the liquid discharge pipe 12, and both the second bypass pipes 25 are bypassed to the two liquid suction pipes 11, respectively; this structure is particularly suitable for the above-described flow passage arrangement employing the double spiral structure.

The first bypass pipe 24 and the second bypass pipe 25 are preferably made of a material having a good heat radiation effect, and for example, both are made of copper pipes.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a centrifugal pump, includes pump case and motor, be connected with pipette and fluid-discharge tube on the pump case, its characterized in that: the motor shell is provided with a heat dissipation flow passage, the inlet end of the heat dissipation flow passage is connected with a first bypass pipe, the first bypass pipe is connected to the liquid discharge pipe in a bypassing mode, the outlet end of the heat dissipation flow passage is connected with a second bypass pipe, and the second bypass pipe is connected to the liquid suction pipe in a bypassing mode.

2. The centrifugal pump of claim 1, wherein: the motor shell comprises an outer shell and an inner shell, the outer shell is sleeved on the inner shell, so that the heat dissipation flow channel is formed in a surrounding mode, and the inlet end and the outlet end of the heat dissipation flow channel are located on the outer shell.

3. The centrifugal pump of claim 2, wherein: and a runner groove is formed in the inner shell, and the outer shell is attached to and sleeved on the inner shell and seals the notch of the runner groove so as to enclose the heat dissipation runner.

4. A centrifugal pump according to claim 2 or 3, wherein: the heat dissipation flow channel is a spiral flow channel.

5. The centrifugal pump of claim 4, wherein: the heat dissipation flow channels are two groups and form a double-spiral structure, and the inlet ends of the two groups of heat dissipation flow channels are respectively located at the two ends of the outer shell.

6. A centrifugal pump according to claim 2 or 3, wherein: the outer shell and the inner shell are welded and fixed.

7. The centrifugal pump of claim 1, wherein: the centrifugal pump is a single-stage double-suction centrifugal pump, the number of the liquid suction pipes is two, and the second side connecting pipe is connected to one of the liquid suction pipes in a side-by-side mode.

8. The centrifugal pump of claim 1, wherein: the centrifugal pump is a single-stage double-suction centrifugal pump, the number of the liquid suction pipes is two, the number of the heat dissipation flow passages is two, the first bypass pipes are both in bypass connection with the liquid discharge pipe, and the second bypass pipes are in bypass connection with the two liquid suction pipes respectively.

9. The centrifugal pump of claim 8, wherein: the two groups of heat dissipation flow passages form a double-spiral structure.

10. The centrifugal pump of claim 1, wherein: the first side connecting pipe and the second side connecting pipe are both copper pipes.

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