CN113969905A - Water pump and vehicle - Google Patents

Abstract

The invention discloses a water pump and a vehicle with the same. The water pump comprises a pump shell, a water inlet pipe, a water outlet pipe and an impeller, wherein the impeller is rotatably arranged in the pump shell, a spiral flow passage is arranged in the pump shell, a separation tongue is arranged in the pump shell, the water inlet pipe is connected with the pump shell and communicated with the spiral flow passage, the water outlet pipe is connected with the pump shell and communicated with the spiral flow passage, the tongue tip surface of the separation tongue is in other contour line shapes such as an inner concave arc surface, an outer concave arc surface and a multi-section profile, or a noise reduction bulge or a noise reduction groove is arranged on the tongue tip surface of the separation tongue. According to the water pump disclosed by the invention, the pressure pulsation generated when the water is thrown out of the impeller and impacts the baffle tongue can be reduced, the phenomena of vibration and noise generated when the water pump runs are reduced, and the reliability of the water pump in working is improved.

Description

Water pump and vehicle

Technical Field

The invention relates to the technical field of water pumps, in particular to a water pump and a vehicle with the water pump.

Background

The electronic water pump controls the rotating speed of the motor through the controller to change the flow rate so as to meet the requirement of a cooling system, and is gradually widely applied. However, the problems of low efficiency, high noise, easy burning of the controller and the like exist due to the high rotating speed and limited structural space of the water pump, and the reliability of the water pump is reduced.

Disclosure of Invention

The present invention is based on the discovery and recognition by the inventors of the following facts and problems:

the electronic water pump comprises an impeller and a pump shell, wherein a baffle tongue is arranged in the pump shell, the upper end surface and the lower end surface of the baffle tongue are generally perpendicular to the axis of the impeller, namely the tip surface of the baffle tongue extends in the vertical direction, the impeller rotates at high speed in the operation process, high-speed water flowing out of the impeller impacts the baffle tongue to generate great pressure pulsation, and the phenomenon of dynamic and static interference between the impeller and the baffle tongue is one of the main sources of noise and vibration of the water pump.

In the related art, the dynamic and static interference is generally reduced by increasing the clearance between the impeller and the partition tongue, but the increase of the clearance reduces the lift and the efficiency of the pump. In addition, it is also proposed in the related art to dispose the partition tongue so as to extend obliquely outward at an angle of not more than 15 degrees, i.e., the lower end of the partition tongue extends obliquely outward with respect to the upper end. The inventor finds that the scheme has limited effect on reducing the noise and vibration of the water pump through research, and has room for improvement.

Therefore, the embodiment of the invention provides the water pump, which can reduce the pressure pulsation at the position of the separation tongue, reduce the vibration and noise phenomena during the operation of the water pump and improve the reliability of the water pump during the operation.

The embodiment of the invention also provides a vehicle comprising the water pump.

The water pump comprises a pump shell, a water inlet pipe, a water outlet pipe and an impeller, wherein the impeller is rotatably arranged in the pump shell, a spiral flow passage is formed in the pump shell, a separation tongue is arranged in the pump shell, the water inlet pipe is connected with the pump shell and communicated with the spiral flow passage, the water outlet pipe is connected with the pump shell and communicated with the spiral flow passage, and a noise reduction bulge or a noise reduction groove is formed in the tongue tip surface of the separation tongue.

According to the water pump provided by the embodiment of the invention, the shape of the tongue tip surface of the separation tongue is changed by arranging the noise reduction protrusion or the noise reduction groove on the tongue tip surface of the separation tongue, so that the time for the water flow at the outlet of the impeller to impact the separation tongue is staggered in the length direction of the separation tongue, namely the up-down direction. Therefore, the pressure pulsation generated when the water is thrown out of the impeller and impacts the baffle tongue can be reduced, the phenomena of vibration and noise generated when the water pump operates are reduced, and the reliability of the water pump during operation is improved.

In some embodiments, the noise reducing projections are arcuate projections.

In some embodiments, the noise reduction protrusion or noise reduction recess is located at a middle position of the tongue tip surface.

A water pump according to another embodiment of the present invention includes: the impeller is rotatably arranged in the pump shell, a spiral flow channel is formed in the pump shell, a separation tongue is arranged in the pump shell, the water inlet pipe is connected with the pump shell and communicated with the spiral flow channel, the water outlet pipe is connected with the pump shell and communicated with the spiral flow channel, and the tongue tip surface of the separation tongue is inwards inclined relative to the rotation axis of the impeller along the direction from the upper end of the separation tongue to the lower end of the separation tongue.

In some embodiments, the angle of inclination of the tongue tip surface of the barrier tongue relative to the axis of rotation of the impeller is greater than 15.6 degrees.

A water pump according to another embodiment of the present invention includes: the impeller is rotatably arranged in the pump shell, a spiral flow channel is formed in the pump shell, a separation tongue is arranged in the pump shell, the water inlet pipe is connected with the pump shell and communicated with the spiral flow channel, the water outlet pipe is connected with the pump shell and communicated with the spiral flow channel, the tongue tip surface of the separation tongue inclines outwards relative to the rotation axis of the impeller along the direction from the upper end of the separation tongue to the lower end of the separation tongue, and the inclination angle of the tongue tip surface is more than or equal to 20 degrees.

A water pump according to another embodiment of the present invention includes: the impeller is rotatably arranged in the pump shell, a spiral flow channel is formed in the pump shell, a separation tongue is arranged in the pump shell, the water inlet pipe is connected with the pump shell and communicated with the spiral flow channel, the water outlet pipe is connected with the pump shell and communicated with the spiral flow channel, the tongue tip surface of the separation tongue inclines outwards relative to the rotation axis of the impeller along the direction from the upper end of the separation tongue to the lower end of the separation tongue, a valley or a convex ridge is arranged on the tongue tip surface, and the valley or the convex ridge extends to the whole length from the upper end of the separation tongue to the lower end of the separation tongue.

A water pump according to another embodiment of the present invention includes: the impeller is rotatably arranged in the pump shell, a spiral flow channel is formed in the pump shell, a separation tongue is arranged in the pump shell, the water inlet pipe is connected with the pump shell and communicated with the spiral flow channel, the water outlet pipe is connected with the pump shell and communicated with the spiral flow channel, the tongue tip surface of the separation tongue is opposite to the rotation axis of the impeller and inclines outwards from the upper end of the separation tongue towards the direction of the lower end of the separation tongue, the tongue tip surface of the separation tongue is divided into multiple sections along the direction from the upper end of the separation tongue towards the lower end of the separation tongue, and the inclination angles of the multiple sections are different.

A water pump according to another embodiment of the present invention includes: the impeller is rotatably arranged in the pump shell, a spiral flow channel is formed in the pump shell, a separation tongue is arranged in the pump shell, the water inlet pipe is connected with the pump shell and communicated with the spiral flow channel, the water outlet pipe is connected with the pump shell and communicated with the spiral flow channel, the tongue tip surface of the separation tongue inclines outwards relative to the rotation axis of the impeller along the direction from the upper end of the separation tongue to the lower end of the separation tongue, and the tongue tip surface of the separation tongue is an arc-shaped surface which protrudes outwards or is recessed inwards.

In some embodiments, the upper or lower contour of the barrier tongue is at least one of straight, circular, conical, concave, convex and flat.

A vehicle according to an embodiment of the present invention includes the water pump of any of the above embodiments.

Drawings

Fig. 1 is a sectional view of a water pump according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a diaphragm of a water pump according to an embodiment of the present invention.

Fig. 3 is an enlarged view of a diaphragm of a water pump according to another embodiment of the present invention.

Fig. 4 is a schematic view of a water pump partition mounting structure according to another embodiment of the present invention.

Fig. 5 is an enlarged view of a in fig. 4.

Fig. 6 is a schematic view of a water pump partition mounting structure according to another embodiment of the present invention.

Fig. 7 is an enlarged view of B in fig. 6.

Fig. 8 is a schematic view of a water pump partition mounting structure according to another embodiment of the present invention.

Fig. 9 is a schematic view of a water pump partition mounting structure according to another embodiment of the present invention.

FIG. 10 is a schematic view of a water pump with a mounting structure for a baffle according to another embodiment of the present invention.

FIG. 11 is a schematic view of a water pump with a mounting structure for a baffle according to another embodiment of the present invention.

FIG. 12 is a schematic view of a water pump with a mounting structure for a baffle according to another embodiment of the present invention.

Fig. 13 is a schematic view of a water pump partition mounting structure according to another embodiment of the present invention.

Reference numerals:

100. a pump housing; 200. a water outlet pipe; 300. a water inlet pipe; 400. an impeller;

1. a spiral flow channel;

2. a tongue is separated; 21. a tongue tip surface; 211. a noise reduction projection; 212. a noise reduction groove; 213. a valley; 214. a raised ridge.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A water pump and a vehicle according to an embodiment of the invention are described below with reference to fig. 1 to 13.

As shown in fig. 1 to 3, a water pump according to an embodiment of the present invention includes a pump case 100, an inlet pipe 300, an outlet pipe 200, and an impeller 400. An impeller 400 is rotatably provided in the pump housing 100 for pressurizing water. The pump shell 100 is internally provided with a spiral flow channel 1, and the water inlet pipe 300 and the water outlet pipe 200 are respectively connected with the pump shell 100 and are communicated with the spiral flow channel 1; the water pressurized by the impeller 400 is discharged from the water outlet pipe 200 by the guide effect of the spiral flow passage 1. Wherein, a baffle 2 is arranged in the pump shell 100, in particular, the baffle 2 is arranged at the joint of the spiral flow channel 1 and the water outlet pipe 200, and is used for improving the water discharging efficiency. The noise reduction protrusion 211 or the noise reduction groove 212 is arranged on the tongue tip surface 21 of the baffle 2, so that the shape of the tongue tip surface 21 is changed, and further, the time when the water flow at the outlet of the impeller 400 impacts the baffle 2 is staggered along the length direction (for example, the up-down direction in fig. 2) of the tongue tip surface 21, and it can be understood that the tongue tip surface 21 of the baffle 2 is the surface of the free end of the baffle 2, as shown in fig. 2 and 3.

When the water pump is operated, water enters the pump housing 100 from the water inlet pipe 300, the impeller 400 rotates at a high speed in the pump housing 100, so that the water flows along the spiral flow channel 1 due to the centrifugal force and is finally discharged from the water outlet pipe 200, thereby increasing the speed and the pressure of the water. The baffle tongue 2 is arranged in the pump shell 100, so that the phenomenon that water is gasified to form cavitation caused by the rotation of water flowing into the water outlet pipe 200 can be avoided, the service life of the water pump can be prolonged, and the efficiency of the water pump during liquid discharge can be improved. The shape of the tongue tip surface 21 of the baffle tongue 2 can be changed by arranging the noise reduction protrusion 211 or the noise reduction groove 212 on the tongue tip surface 21 of the baffle tongue 2, and the time of water at the outlet of the impeller 400 impacting the baffle tongue 2 is staggered in the length direction of the tongue tip surface 21, so that pressure pulsation generated when water is thrown out of the impeller 400 and impacts the baffle tongue 2 is reduced, vibration and noise phenomena during the operation of the water pump are reduced, and the reliability of the water pump during the operation is improved.

In some embodiments, as shown in fig. 2 and 3, the noise reduction projection 211 or the noise reduction recess 212 is located at a middle position of the tongue tip face 21. Since the projection length of the partition tongue 2 in the direction of the rotation axis of the impeller 400 is greater than the projection length of the outlet side of the impeller 400 in the direction of the rotation axis of the impeller 400, the partition tongue 2 is located at the middle of the side surface of the impeller 400. It can be understood that the projection area of the outlet edge of the impeller 400 in the length direction of the partition tongue 2 is positioned in the middle part of the tongue tip surface 21 of the partition tongue 2. Therefore, the middle part of the tongue-tip surface 21 is subjected to a large impact force by the fluid at the outlet of the impeller 400, and the upper and lower sides of the middle part of the tongue-tip surface 21 are subjected to a small impact force by the fluid at the outlet of the impeller 400. Therefore, the noise reduction protrusion 211 or the noise reduction groove 212 is arranged in the middle of the tongue tip surface 21, so that the time of fluid at the outlet of the impeller 400 impacting the baffle tongue 2 can be effectively staggered, the pressure pulsation generated when the water impacts the baffle tongue 2 is further reduced, and the vibration and noise phenomena during the operation of the water pump are reduced.

In some embodiments, the transition between the noise reduction protrusion 211 or the noise reduction groove 212 and the tongue tip surface 21 may be in the form of a circular arc, a cone, a wavy line, a polygon, a multi-segment line, or the like. Preferably, the noise reduction protrusions 211 are arc-shaped protrusions. It will also be appreciated that the surface of the noise reducing projection 211 smoothly transitions with the tongue tip surface 21 through a curved surface. Further, the polishing surface of the noise reduction groove 212 and the tongue tip surface 21 are smoothly transited by a curved surface. Thereby reducing the pressure loss when the fluid flows through the baffle 2 and improving the working efficiency of the water pump.

A water pump according to another embodiment of the present invention includes a pump case 100, a water inlet pipe 300, a water outlet pipe 200, and an impeller 400. An impeller 400 is rotatably provided in the pump housing 100 for pressurizing water. The pump shell 100 is internally provided with a spiral flow channel 1, and the water inlet pipe 300 and the water outlet pipe 200 are respectively connected with the pump shell 100 and are communicated with the spiral flow channel 1; the water pressurized by the impeller 400 is discharged from the water outlet pipe 200 by the guide effect of the spiral flow passage 1. Wherein, a baffle 2 is arranged in the pump shell 100, in particular, the baffle 2 is arranged at the joint of the spiral flow channel 1 and the water outlet pipe 200, and is used for improving the water discharging efficiency. As shown in fig. 4 and 5, the tongue tip surface 21 of the partition tongue 2 is inclined inward in a direction from the upper end of the partition tongue 2 toward the lower end of the partition tongue 2 with respect to the rotation axis of the impeller 400. It can be understood that the length of the upper end surface of the separation tongue 2 towards the extending direction thereof is greater than the length of the lower end surface of the separation tongue 2 towards the extending direction thereof, and the tongue tip surface 21 is obliquely arranged along the upper end of the separation tongue 2 towards the lower end of the separation tongue 2, so that the tongue tip surface 21 forms an included angle with the rotation axis of the impeller 400. Therefore, the shape of the tongue tip surface 21 of the baffle tongue 2 is changed, and the time of the water at the outlet of the impeller 400 impacting the baffle tongue 2 is staggered in the length direction of the tongue tip surface 21, so that the pressure pulsation generated when the water is thrown out of the impeller 400 and impacts the baffle tongue 2 is reduced, the vibration and noise phenomena during the operation of the water pump are reduced, and the reliability of the water pump during the operation is improved.

Further, the inclination angle θ of the tongue tip surface 21 of the diaphragm 2 with respect to the rotation axis of the impeller 400 is larger than 15.6 degrees, as shown in fig. 5. Because the inclination angle of the tongue-tip surface 21 is larger than 15.6 degrees, the changed shape of the tongue-tip surface 21 is obvious, and correspondingly, the pressure pulsation generated when the water thrown out of the impeller 400 impacts the baffle tongue 2 is also obviously reduced, so that the phenomena of vibration and noise during the operation of the water pump can be obviously reduced.

A water pump according to another embodiment of the present invention includes a pump case 100, a water inlet pipe 300, a water outlet pipe 200, and an impeller 400. An impeller 400 is rotatably provided in the pump housing 100 for pressurizing water. The pump shell 100 is internally provided with a spiral flow channel 1, and the water inlet pipe 300 and the water outlet pipe 200 are respectively connected with the pump shell 100 and are communicated with the spiral flow channel 1; the water pressurized by the impeller 400 is discharged from the water outlet pipe 200 by the guide effect of the spiral flow passage 1. Wherein, a baffle 2 is arranged in the pump shell 100, in particular, the baffle 2 is arranged at the joint of the spiral flow channel 1 and the water outlet pipe 200, and is used for improving the water discharging efficiency. As shown in fig. 6 and 7, the tongue tip surface 21 of the partition tongue 2 is inclined outward in a direction from the upper end of the partition tongue 2 toward the lower end of the partition tongue 2 with respect to the rotation axis of the impeller 400. It can be understood that the length of the upper end surface of the separation tongue 2 towards the extending direction thereof is less than the length of the lower end surface of the separation tongue 2 towards the extending direction thereof, the tongue tip surface 21 is obliquely arranged along the upper end of the separation tongue 2 towards the lower end of the separation tongue 2, so that the tongue tip surface 21 forms a certain included angle with the rotation axis of the impeller 400, and it can be understood that the oblique arrangement of the tongue tip surface 21 along the upper end of the separation tongue 2 towards the lower end of the separation tongue 2 can be wholly oblique or partially oblique. Specifically, the inclination angle α of the tongue tip surface 21 with respect to the rotation axis of the impeller 400 is 20 degrees or more, as shown in fig. 7. Furthermore, along the length direction (for example, the vertical direction in fig. 7) of the tongue tip surface 21, the time of the water flow at the outlet of the impeller 400 impacting the baffle tongue 2 is staggered, so that the pressure pulsation generated when the water is thrown out of the impeller 400 and impacts the baffle tongue 2 is reduced, the vibration and noise phenomena during the operation of the water pump are reduced, and the reliability of the water pump during the operation is improved.

Further changing the shape of the tongue tip surface 21 of the separation tongue 2 when being impacted by water, so as to achieve the purpose of staggering the time of the water at the outlet of the impeller 400 impacting the separation tongue 2. Thereby reducing vibration and noise during operation of the water pump. At this time, the pressure pulsation generated when the water thrown out of the impeller 400 impacts the baffle 2 is obviously reduced, so that the phenomena of vibration and noise during the operation of the water pump can be obviously reduced.

A water pump according to another embodiment of the present invention includes a pump case 100, a water inlet pipe 300, a water outlet pipe 200, and an impeller 400. An impeller 400 is rotatably provided in the pump housing 100 for pressurizing water. The pump shell 100 is internally provided with a spiral flow channel 1, and the water inlet pipe 300 and the water outlet pipe 200 are respectively connected with the pump shell 100 and are communicated with the spiral flow channel 1; the water pressurized by the impeller 400 is discharged from the water outlet pipe 200 by the guide effect of the spiral flow passage 1. Wherein, a baffle 2 is arranged in the pump shell 100, in particular, the baffle 2 is arranged at the joint of the spiral flow channel 1 and the water outlet pipe 200, and is used for improving the water discharging efficiency. As shown in fig. 8 and 9, the tongue tip surface 21 of the partition tongue 2 is inclined outward in a direction from the upper end of the partition tongue 2 toward the lower end of the partition tongue 2 with respect to the rotation axis of the impeller 400. It can be understood that the length of the upper end surface of the separation tongue 2 towards the extending direction thereof is less than the length of the lower end surface of the separation tongue 2 towards the extending direction thereof, the tongue tip surface 21 is obliquely arranged along the upper end of the separation tongue 2 towards the lower end of the separation tongue 2, so that the tongue tip surface 21 forms a certain included angle with the rotation axis of the impeller 400, and it can be understood that the oblique arrangement of the tongue tip surface 21 along the upper end of the separation tongue 2 towards the lower end of the separation tongue 2 can be wholly oblique or partially oblique. Specifically, the tongue tip surface 21 is provided with a valley 213 or a ridge 214, and the valley 213 or the ridge 214 extends from the upper end of the tongue 2 to the lower end of the tongue 2, optionally, one or more valleys 213 or ridges 214 may be provided, or the valley 213 and the ridge 214 are combined with each other on the tongue tip surface 21, and preferably, the valley 213 and the ridge 214 are combined and arranged on the tongue tip surface 21 along the thickness direction of the tongue 2. Therefore, the shape of the tongue-tip surface 21 is changed, and the time for the water flow at the outlet of the impeller 400 to impact the baffle tongue 2 is staggered along the length direction (for example, the vertical direction in fig. 8) of the tongue-tip surface 21, so that the pressure pulsation generated when the water thrown out of the impeller 400 impacts the baffle tongue 2 is reduced, and the vibration and noise phenomena during the operation of the water pump are reduced.

A water pump according to another embodiment of the present invention includes a pump case 100, a water inlet pipe 300, a water outlet pipe 200, and an impeller 400. An impeller 400 is rotatably provided in the pump housing 100 for pressurizing water. The pump shell 100 is internally provided with a spiral flow channel 1, and the water inlet pipe 300 and the water outlet pipe 200 are respectively connected with the pump shell 100 and are communicated with the spiral flow channel 1; the water pressurized by the impeller 400 is discharged from the water outlet pipe 200 by the guide effect of the spiral flow passage 1. Wherein, a baffle 2 is arranged in the pump shell 100, in particular, the baffle 2 is arranged at the joint of the spiral flow channel 1 and the water outlet pipe 200, and is used for improving the water discharging efficiency. As shown in fig. 10 and 11, the tongue tip surface 21 of the partition tongue 2 is inclined outward in a direction from the upper end of the partition tongue 2 toward the lower end of the partition tongue 2 with respect to the rotation axis of the impeller 400. It can be understood that the length of the upper end surface of the separation tongue 2 towards the extending direction thereof is smaller than the length of the lower end surface of the separation tongue 2 towards the extending direction thereof, and the tongue tip surface 21 is obliquely arranged along the upper end of the separation tongue 2 towards the lower end of the separation tongue 2, so that the tongue tip surface 21 forms an included angle with the rotation axis of the impeller 400. It can be understood that the tongue tip surface 21 may be inclined entirely or partially along the upper end of the partition tongue 2 toward the lower end of the partition tongue 2. The tongue tip surface 21 of the partition tongue 2 is divided into a plurality of sections along the direction from the upper end of the partition tongue 2 to the lower end of the partition tongue 2, and the inclination angles of the plurality of sections are different. Optionally, transition sections among the multiple sections of tongue tip surfaces 21 may adopt transition modes such as linear transition, curved transition, outer circular arc transition, inner and outer concave-convex transition and the like, so as to change the shape of the tongue tip surfaces 21, so that along the length direction (for example, the up-down direction in fig. 8) of the tongue tip surfaces 21, the time for water flow at the outlet of the impeller 400 to impact the baffle tongues 2 is staggered, thereby reducing pressure pulsation generated when water is thrown out of the impeller 400 and impacts the baffle tongues 2, and reducing vibration and noise phenomena during operation of the water pump.

Furthermore, the contour line of the upper end or the contour line of the lower end of the separation tongue 2 can be in the shapes of a straight line, an arc, a cone, an indent, an evagination, a flat bottom and the like, so as to further reduce the impact effect of water flow on the separation tongue.

A water pump according to another embodiment of the present invention includes a pump case 100, a water inlet pipe 300, a water outlet pipe 200, and an impeller 400. An impeller 400 is rotatably provided in the pump housing 100 for pressurizing water. The pump shell 100 is internally provided with a spiral flow channel 1, and the water inlet pipe 300 and the water outlet pipe 200 are respectively connected with the pump shell 100 and are communicated with the spiral flow channel 1; the water pressurized by the impeller 400 is discharged from the water outlet pipe 200 by the guide effect of the spiral flow passage 1. Wherein, a baffle 2 is arranged in the pump shell 100, in particular, the baffle 2 is arranged at the joint of the spiral flow channel 1 and the water outlet pipe 200, and is used for improving the water discharging efficiency. As shown in fig. 12 and 13, the tongue tip surface 21 of the partition tongue 2 is inclined outward in a direction from the upper end of the partition tongue 2 toward the lower end of the partition tongue 2 with respect to the rotation axis of the impeller 400. It can be understood that the length of the upper end surface of the separation tongue 2 towards the extending direction thereof is smaller than the length of the lower end surface of the separation tongue 2 towards the extending direction thereof, and the tongue tip surface 21 is obliquely arranged along the upper end of the separation tongue 2 towards the lower end of the separation tongue 2, so that the tongue tip surface 21 forms an included angle with the rotation axis of the impeller 400. It can be understood that the tongue tip surface 21 may be inclined entirely or partially along the upper end of the partition tongue 2 toward the lower end of the partition tongue 2. The tongue tip surface 21 of the separation tongue 2 is an arc surface which is convex outwards or concave inwards. That is, the surface of the tongue tip surface 21 is a curved surface structure that is entirely convex outward or entirely concave inward. Furthermore, the shape of the tongue tip surface 21 of the baffle 2 can be changed, so that the time of the water at the outlet of the impeller 400 impacting the baffle 2 is staggered in the length direction of the tongue tip surface 21, thereby reducing the pressure pulsation generated when the water is thrown out of the impeller 400 and impacts the baffle 2, reducing the vibration and noise phenomena during the operation of the water pump,

the inventor carries out comparison experiments respectively aiming at the original baffle 2, the baffle 2 provided with the noise reduction protrusion 211, the baffle 2 provided with the noise reduction groove 212 and the baffle 2 provided with the inclination angle. The following experimental results were obtained.

Specifically, the inventors performed technical verification experiments by simulating computational fluid dynamics software, namely CFD software. Modeling is first performed in software, and thenAnd (3) detecting the pressure of the water outlet pipe 200 close to the partition tongue 2, and setting pressure monitoring points P17, P19 and P23. As shown in figure 1, P17 is arranged at the position of the baffle 2, P19 is arranged at the position of the second section of the pump shell flow passage, and P23 is arranged at the position of the water outlet pipe 200 close to the baffle 2. After the fluid in the model tends to be stable, extracting the pressure value of each point, and converting the pressure value into a dimensionless pressure coefficient Cp, wherein the calculation formula of the Cp is as follows:

in the formula: p is the static pressure at the monitoring point: the average static pressure of a monitoring point in 1 rotation period of the water pump is the peripheral speed of the outlet of the impeller.

And further obtaining pressure fluctuation curves under different schemes, comparing Cp curve peak values of different schemes, taking out wave troughs of monitoring points of each scheme, and comparing to obtain comparison experiment data table 1 as follows. The pressure pulsation at the trough is reduced for all three designs. The fluctuation laws of the monitoring points P17, P19 and P23 are consistent with each other.

TABLE 1 comparison table of Cp values of monitoring points of different schemes

As can be seen from Table 1, the pressure pulsation reduction amplitude of the three schemes at the position of the separation tongue 2 is up to 12%, and the pressure fluctuation at the position of the separation tongue 2 is the most violent, so the reduction amplitude is most obvious, and the P19 and P23 fluctuation values far away from the separation tongue 2 are smaller, but the three schemes have different degrees of reduction.

Further, the inventors conducted a comparative experiment with respect to a scheme in which the tongue tip face 21 of the partition tongue 2 is inclined outward in a direction from the upper end of the partition tongue 2 toward the lower end of the partition tongue 2 with respect to the rotation axis of the impeller 400.

Specifically, the inventors conducted comparative experiments for the inclination angles of the tongue tip face 21 with respect to the rotation axis of the impeller 400 of 0, 10 degrees, 20 degrees, and 30 degrees, respectively. The experimental results obtained in table 2, verified by CFD techniques, are as follows.

TABLE 2 Effect of Tilt Angle on Cp values

The inventors concluded the following from the above experimental results. The larger the inclination angle of the tongue tip surface 21 is, the larger the time interval of the water flow at the outlet of the impeller 400 impacting the baffle tongue 2 is, and the more obvious the effect of reducing the pressure pulsation near the baffle tongue 2 is. Therefore, it is preferable that the inclination angle of the tongue tip surface 21 with respect to the rotation axis of the impeller 400 is 20 degrees or more.

The vehicle according to the embodiment of the invention comprises the water pump according to any one of the above embodiments of the invention, wherein the vehicle can be a new energy vehicle, a fuel vehicle and the like, wherein the new energy vehicle comprises a pure electric vehicle, an extended range electric vehicle, a hybrid electric vehicle, a fuel cell electric vehicle, a hydrogen engine vehicle and the like.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (11)

1. A water pump, comprising: the impeller is rotatably arranged in the pump shell, a spiral flow channel is formed in the pump shell, a separation tongue is arranged in the pump shell, the water inlet pipe is connected with the pump shell and communicated with the spiral flow channel, the water outlet pipe is connected with the pump shell and communicated with the spiral flow channel, and a noise reduction protrusion or a noise reduction groove is formed in the tongue tip of the separation tongue.

2. The water pump of claim 1, wherein the noise reducing projections are arcuate projections.

3. The water pump of claim 1, wherein the noise reduction protrusion or noise reduction groove is located at a middle position of the tongue tip surface.

4. A water pump, comprising: the impeller is rotatably arranged in the pump shell, a spiral flow channel is formed in the pump shell, a separation tongue is arranged in the pump shell, the water inlet pipe is connected with the pump shell and communicated with the spiral flow channel, the water outlet pipe is connected with the pump shell and communicated with the spiral flow channel, and the tongue tip surface of the separation tongue is inwards inclined relative to the rotation axis of the impeller along the direction from the upper end of the separation tongue to the lower end of the separation tongue.

5. The water pump of claim 4, wherein a tongue tip surface of the barrier tongue is inclined at an angle greater than 15.6 degrees with respect to a rotational axis of the impeller.

6. A water pump, comprising: the impeller is rotatably arranged in the pump shell, a spiral flow channel is formed in the pump shell, a separation tongue is arranged in the pump shell, the water inlet pipe is connected with the pump shell and communicated with the spiral flow channel, the water outlet pipe is connected with the pump shell and communicated with the spiral flow channel, the tongue tip surface of the separation tongue inclines outwards relative to the rotation axis of the impeller along the direction from the upper end of the separation tongue to the lower end of the separation tongue, and the inclination angle of the tongue tip surface is more than or equal to 20 degrees.

7. A water pump, comprising: the impeller is rotatably arranged in the pump shell, a spiral flow channel is formed in the pump shell, a separation tongue is arranged in the pump shell, the water inlet pipe is connected with the pump shell and communicated with the spiral flow channel, the water outlet pipe is connected with the pump shell and communicated with the spiral flow channel, the tongue tip surface of the separation tongue inclines outwards relative to the rotation axis of the impeller along the direction from the upper end of the separation tongue to the lower end of the separation tongue, a valley or a convex ridge is arranged on the tongue tip surface, and the valley or the convex ridge extends to the whole length from the upper end of the separation tongue to the lower end of the separation tongue.

8. A water pump, comprising: the impeller is rotatably arranged in the pump shell, a spiral flow channel is formed in the pump shell, a separation tongue is arranged in the pump shell, the water inlet pipe is connected with the pump shell and communicated with the spiral flow channel, the water outlet pipe is connected with the pump shell and communicated with the spiral flow channel, the tongue tip surface of the separation tongue is opposite to the rotation axis of the impeller and inclines outwards from the upper end of the separation tongue towards the direction of the lower end of the separation tongue, the tongue tip surface of the separation tongue is divided into multiple sections along the direction from the upper end of the separation tongue towards the lower end of the separation tongue, and the inclination angles of the multiple sections are different.

9. A water pump, comprising: the impeller is rotatably arranged in the pump shell, a spiral flow channel is formed in the pump shell, a separation tongue is arranged in the pump shell, the water inlet pipe is connected with the pump shell and communicated with the spiral flow channel, the water outlet pipe is connected with the pump shell and communicated with the spiral flow channel, the tongue tip surface of the separation tongue inclines outwards relative to the rotation axis of the impeller along the direction from the upper end of the separation tongue to the lower end of the separation tongue, and the tongue tip surface of the separation tongue is an arc-shaped surface which protrudes outwards or is recessed inwards.

10. A water pump according to any one of claims 1 to 9, wherein the upper or lower contour of the diaphragm is at least one of straight, circular, conical, concave, convex and flat.

11. A vehicle, characterized in that it comprises a water pump according to any one of claims 1-10.

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