WO2022188266A1

WO2022188266A1 - Volute and water pump having volute

Info

Publication number: WO2022188266A1
Application number: PCT/CN2021/095140
Authority: WO
Inventors: 陶恒飞
Original assignee: 佛山市顺德区一拓电气有限公司
Priority date: 2021-03-08
Filing date: 2021-05-21
Publication date: 2022-09-15
Also published as: CN215256976U

Abstract

A volute and a water pump having the volute. The volute comprises a volute body (14). The volute body (14) is provided with a chamber (1) and a spiral flow channel (2) communicated with the chamber (1), and the chamber (1) is provided in the middle of the volute body (14). The other end of an impeller (19) is located in the chamber (1). The chamber (1) is provided with a water inlet (3) and at least one water inlet hole (4) provided at the periphery of the water inlet (3). The periphery of the water inlet (3) is further provided with a connecting position (8) for being in clearance fit with a water outlet end (23) of a filtering device (16) in the water pump. A water outlet (5) is formed at the tangent line of the outer circumference of the spiral flow channel (2), a first notch (6) is formed in at least one side of the water outlet (5), and a recess position (7) is formed on the outer side of the volute body (14). The volute and the water pump having the volute are simple in structure, and the internal structure of the water pump can be simplified.

Description

A volute and a water pump with the volute

technical field

The utility model relates to the technical field of water pumps, in particular to a volute and a water pump with the volute.

Background technique

Water-cooled water pumps are machinery that transports liquids or pressurizes liquids. Existing water pumps generally include a volute, an impeller installed in the volute, a motor for driving the impeller to rotate, and other components. The main shaft of the motor is used to drive the impeller to rotate to form a negative pressure. The water in the pool is sucked into the volute under the external atmospheric pressure and supplements this space, and then thrown out of the volute by the impeller, and the water can be continuously transported.

During the working process of the pump, the motor needs to run continuously to generate a certain amount of heat. In order to reduce the operating temperature of the motor, the existing water pump is equipped with a radiator attached to the motor, resulting in a complicated internal structure of the water pump and a large volume of the water pump. If a new method is adopted to reduce the temperature of the motor and simplify the internal structure of the pump, the existing volutes cannot be installed in the pump body.

Utility model content

The purpose of the utility model is to provide a volute and a water pump with the volute, which has a simple structure and can simplify the internal structure of the water pump.

In order to achieve the above purpose, the present invention provides a volute and a water pump having the volute, which comprises a volute body, and the volute body is provided with a chamber and a spiral flow channel communicating with the chamber, so that the The chamber has a water inlet and at least one water inlet hole arranged on the outer periphery of the water inlet, the outer periphery of the water inlet is also provided with a connection position for clearance fit with the water outlet of the filter device, and the spiral flow channel has A water outlet, at least one side of the water outlet is provided with a first notch, and the outer periphery of the volute body is provided with a concave position.

Optionally, the number of the water inlet holes is several, and each of the water inlet holes is evenly distributed on the outer periphery of the water inlet at equal intervals with the central axis of the water inlet as the center.

Optionally, the connection position is a concave portion for clearance fit with the water outlet end of the filter device, the concave portion is concave inward along the axial direction of the volute body, and the water inlet hole is provided on the concave portion.

Optionally, the volute body is provided with two rings of annular protrusions outward along the axial direction thereof, and the concave portion is formed between the annular protrusions.

Optionally, the sum of the opening areas of the water inlet holes is 10% to 50% of the cross-sectional area of the concave portion located in the plane where the opening of the water inlet hole is located.

Optionally, the opening area of the first notch is 0.7 mm ² to 176 mm ² .

Optionally, the number of the first gaps is at least two.

Optionally, each of the first notches is symmetrically arranged on both sides of the water outlet.

Optionally, at least two connecting protrusions extend along the radial direction of the outer circumference of the volute body, and the concave positions are formed between the connecting protrusions.

Optionally, the volute body is provided with a limit slot along its axial direction.

Optionally, a connecting pipe is provided on one side of the volute body, and the first end of the connecting pipe communicates with the chamber.

Optionally, a second notch is provided on the second end of the connecting pipe, and the second notch is recessed along the axis direction of the connecting pipe.

Optionally, the opening area of the second notch is 0.7 mm ² to 176 mm ² .

Optionally, the number of the second gaps is at least two.

Optionally, each of the second notches is symmetrically arranged along the axis of the connecting pipe.

Optionally, the volute body includes a first half-shell and a second half-shell connected to the first half-shell.

Optionally, the material of the volute body is plastic.

In order to solve the same technical problem, the present invention also provides a water pump, which includes the volute as described in any of the above technical solutions.

Compared with the prior art, a volute and a water pump with the volute provided by the utility model have the beneficial effects that: the outer periphery of the water inlet of the volute body of the present utility model is provided with a water outlet that fits with the water outlet of the filter device. the connection position, so that there is a gap for the water supply to flow through between the connection position and the water outlet. By providing a first gap at the water outlet of the volute body, a first water flow channel is formed between the first gap and the casing. By providing a concave portion on the outer periphery of the volute, a second water flow channel is formed between the concave portion and the casing. After the volute is installed on the water pump, when the water pump is working, the material enters the chamber and the spiral flow channel from the water inlet in sequence, and flows to the water outlet, and a part of the water in the water outlet is discharged to complete the filtration water path. The water located in the other part of the water outlet cools the motor through the first gap, absorbs the heat of the motor, enters the chamber and the spiral flow channel from the recess through the gap and the water inlet hole, and is discharged from the water outlet to complete the water cooling cycle. By opening holes and recesses at specific positions of the volute body, the water pump is formed with two water paths, a filtering water path and a water cooling circulation main path, during operation. The volute has a simple structure and can be preferably used in a water pump. After the volute is installed on the water pump, the water can be used to cool the motor, and there is no need to install a heat dissipation device for the motor to dissipate heat, which simplifies the internal structure of the water pump, achieves better heat dissipation effect of the water pump, and effectively reduces the cost of the water pump.

Description of drawings

Fig. 1 is the perspective view of the volute of the present utility model embodiment in the front view direction;

Fig. 2 is the perspective view of the volute of the embodiment of the present invention in the rear view direction;

3 is a schematic structural diagram of a first half-shell according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a second half-shell according to an embodiment of the present invention.

5 is a schematic structural diagram of a water pump according to an embodiment of the present invention;

Fig. 6 is the exploded view of the water pump of the embodiment of the present utility model;

7 is a perspective view of an impeller of a water pump according to an embodiment of the present invention.

In the figure, 1, chamber; 2, spiral flow channel; 3, water inlet; 4, water inlet hole; 5, water outlet; 6, first notch; 7, concave position; 8, connecting position; 9, annular convex 10, connecting convex part; 11, limiting protrusion; 12, connecting pipe; 13, second notch; 14, volute body; 141, first half shell; 142, second half shell; 15, shell; 16, filter device; 17, motor shell; 171, outer shell; 172, inner shell; 18, limit slot; 19, impeller; 191, connecting shaft; 192, wheel shell; 193, blade; 20, 21, the water outlet; 22, the second feed end; 23, the water outlet; 24, the water cooling chamber; 25, the water through hole; 26, the connecting piece.

Detailed ways

The specific embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be understood that the terms “center”, “upper”, “lower”, The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or It is implied that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

It should be understood that the terms "first", "second", etc. are used to describe various information in the present invention, but the information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information without departing from the scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, or It can be connected in one piece; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

A volute of a preferred embodiment of the present invention is mainly applied to a water pump. As shown in FIGS. 5 and 6 , the water pump includes a housing 15 , a filter device 16 , a motor housing 17 , a motor (not shown in the figures), a volute, and an impeller 19 . Both the filter device 16 and the volute are installed in the casing 15 , and the casing 15 is provided with a first feed end 20 and a water outlet 21 . The filter device 16 is provided with a second feed end 22 and a water outlet end 23 , and the second feed end 22 communicates with the first feed end 20 . The motor casing 17 includes an outer casing 171 and an inner casing 172 installed in the outer casing 171 , a water cooling cavity 24 is formed between the inner casing 172 and the outer casing 171 , and the motor is installed in the inner casing 172 . One end of the impeller 19 is connected to the motor through the outer casing 171 and the inner casing 172 in sequence, and the other end of the impeller 19 is located in the volute. The impeller 19 includes a connecting shaft 191, a wheel housing 192 and a blade 193. One end of the connecting shaft 191 is connected to the motor through the outer casing 171 and the inner casing 172 in turn, and the other end of the connecting shaft 191 is connected to the wheel casing 192. The blade 193 is rotatably connected to the wheel inside the shell 192.

As shown in FIGS. 1 to 4 , the volute provided by the present invention includes a volute body 14 , and the volute body 14 is provided with a chamber 1 and a spiral flow channel 2 communicating with the chamber 1 , and the chamber 1 is arranged in the volute. The middle of the body 14 . The other end of the impeller 19 is located in the chamber 1 . The chamber 1 has a water inlet 3 and at least one water inlet hole 4 provided on the outer periphery of the water inlet 3 . The outer circumference of the water inlet 3 is also provided with a connection position 8 for clearance fit with the water outlet 23 of the filter device 16 in the water pump. The outer circumference of the spiral flow channel 2 is provided with a water outlet 5, and at least one side of the water outlet 5 is provided with a water outlet 5. There is a first notch 6 , and a concave position 7 is provided on the outer side of the volute body 14 .

As shown in FIGS. 3 and 4 , the volute in this embodiment includes a first half-shell 141 and a second half-shell 142 . Both the first half casing 141 and the second half casing 142 are made of plastic, which can reduce the overall weight of the volute and the water pump. The first half-shell 141 and the second half-shell 142 are connected by welding or other mechanical connection. The opposite side of the first half-shell 141 and the second half-shell 142 is provided with a snap-fitting protrusion (not shown in the figure), and the opposite side of the second half-shell 142 and the first half-shell 141 is provided with The connection between the first half-shell 141 and the second half-shell 142 is reinforced by the snap-fit with the snap-fit concave portion (not shown in the figure). The first half-shell 141 and the second half-shell 142 are connected to form the chamber 1 and the spiral flow channel 2 . The first half-shell 141 and the second half-shell 142 together form the water outlet 5 . As shown in FIG. 3 , the shape of the water inlet 3 is circular, and the water inlet 3 is arranged at the center of the first half-shell 141 . The connecting position 8 is provided on the side of the first half-shell 141 away from the second half-shell 142 , and the concave position 7 is provided on the outer circumference of the first half-shell 141 .

As shown in FIGS. 5 and 6 , after the volute is installed on the water pump, the volute body 14 is located between the filter device 16 and the casing 171 , and the volute body 14 is connected to the filter device 16 and the casing 171 respectively. The volute body 14 is connected to the filter device 16 through the connection point 8 . The connection position 8 and the water outlet end 23 are in clearance fit, so that a gap is formed between the connection position 8 and the water outlet end 23 . A first water flow channel is formed between the first gap 6 and the inner wall of the housing 15, and the first water flow channel communicates with the water cooling cavity 24. Since the casing 15 is wrapped outside the volute, a second water flow channel through which the water flow passes is formed between the recess 7 and the inner side wall of the casing 15 . The concave position 7 corresponds to the position of the water cooling cavity 24 , so that the second water flow channel communicates with the water cooling cavity 24 . The second water flow channel also communicates with the gap. The water flowing out from the first notch 6 can enter the water cooling cavity 24 to take away the heat of the motor outside the inner casing 172 of the motor, so as to cool the motor. The cooled water located in the water cooling chamber 24 enters the gap through the recess 7 , enters the chamber 1 and the spiral flow channel 2 through the water inlet hole 4 , and is discharged from the water outlet 21 through the water outlet 5 . The above water circuit forms the main circuit of the water cooling cycle.

Based on the above technical solutions, in the working state, the impeller 19 rotates in the chamber 1 to form a negative pressure environment, so that the water filtered by the filter device 16 enters the chamber 1 from the water inlet 3 . After the water passes through the spiral flow channel 2, a part of the water is discharged to the water outlet 21 on the casing 15 through the water outlet 5 to be discharged to the outside of the water pump, and this part of the water channel is a filtered water channel. The water located in another part of the water outlet 5 flows out from the first gap 6 and flows into the water cooling cavity 24 along the first water flow channel, and the outer surface of the inner shell 172 reduces the operating temperature of the motor in a water-cooled manner, so that the water pump can The cooling module is omitted, the volume of the water pump is reduced, and the cost is reduced. After the cooling operation is completed, the water flows from the second water channel formed between the recess 7 and the water pump housing 15, passes through the gap and the water inlet hole 4 in turn, enters the chamber 1 and the spiral flow channel 2, and discharges the water pump from the water outlet 5. In addition, the above water circuit is the main circuit of water cooling cycle. The volute has a simple structure, and is connected to the filter device 16 of the water pump through the connection position 8; by setting the first gap 6, part of the water can flow through the outside of the motor, so as to reduce the operating temperature of the motor, achieve the effect of high-efficiency water cooling, and improve the water pump. By setting the recess 7, the gap and the water inlet hole 4 to form a flow channel for the water after cooling the motor to return to the volute, the water after reducing the temperature of the motor can flow from the water outlet 5 together with the water flow of other parts. It is discharged, or discharged from the first notch 6 to the outside of the motor casing 17 again, and participates in the water cooling and cooling operation again. After using the volute, the volute provides more than two circulating water paths, and the motor is cooled by water cooling without installing a heat dissipation module, which simplifies the internal structure of the water pump, reduces the cost of the water pump, and enhances the heat dissipation effect of the motor.

In actual operation, the number of water inlet holes 4 is at least one. When the number of water inlet holes 4 is only one, the water cooling efficiency of the water cooling main circuit is low. Therefore, in this embodiment, the number of water inlet holes 4 is several, and each water inlet hole 4 is evenly distributed at the water inlet at equal intervals with the central axis of the water inlet 3 (or the center of the water inlet 3) as the center. 3 to ensure that the water flowing from the gap to the vicinity of the water inlet 3 can enter the chamber 1 from all directions.

The water outlet 23 of the filter device 16 in the existing water pump is structured as a cylindrical annular convex portion. In order to better connect with the filter device 16 , as shown in FIG. 2 , the connection position 8 is a recess for clearance fit with the water outlet end 23 of the filter device 16 , specifically, the recess is an annular recess. The concave portion is recessed toward the inner side of the volute body 14 along the axial direction of the volute body 14 , that is, toward the direction of the chamber 1 . The concave portion is connected with the annular convex portion of the filter device 16 to ensure that the volute is connected to the filter device 16 . A clearance fit is adopted between the concave portion and the annular convex portion of the filter device 16 to form a gap through which the above-mentioned water supply flow passes, forming a complete main circuit of water cooling circulation. The water inlet hole 4 is arranged on the bottom side of the concave part, so that the water flow from the gap directly flows into the chamber 1 through the water inlet hole 4, so as to ensure the integrity of the main circuit of the water cooling cycle and shorten the water circuit. The volute body 14 is provided with two rings of annular protrusions 9 along its axis direction outside the chamber 1 , and recesses are formed between the annular protrusions 9 . The axes of the two rings of annular protrusions 9 are located on the same straight line, and the water inlet hole 4 is located between the two rings of annular protrusions 9 . The distance between the two rings of annular protrusions 9 is greater than the width of the annular convex portion of the filter device 16 , so that the width of the concave portion is greater than the width of the annular convex portion, ensuring that the concave portion fits with the water outlet 23 of the filter device 16 to form a gap. By providing two rings of annular protrusions 9 , a concave portion for positioning and connecting the filter device 16 can be formed on the outer side of the volute body 14 without affecting the volume of the chamber 1 . The two rings of annular protrusions 9 can be clamped with the water outlet end 23 of the filter device 16 to ensure that the filter device 16 is installed at the water inlet 3 of the volute body 14 .

The sum of the opening areas of the water inlet holes 4 is 10% to 50% of the cross-sectional area of the concave portion located in the plane where the openings of the water inlet holes 4 are located. The ratio of the cross-sectional area of the water inlet hole 4 to the connection position 8 is the optimal ratio determined by the research and development personnel after repeated experiments. When the ratio of the opening area of the water inlet hole 4 to the cross-sectional area of the concave portion in the plane where the opening of the water inlet hole 4 is located is too small, the amount of water flowing out from the water cooling cavity 24 is small, resulting in the water flow rate of the water cooling main circuit being too slow, which is The efficiency of motor cooling is low. When the ratio of the opening area of the water inlet hole 4 to the cross-sectional area of the concave portion in the plane where the opening of the water inlet hole 4 is located is too large, the negative pressure effect generated by the rotation of the impeller 19 inside the volute 14 will be affected, and the water intake of the water pump will be affected. The amount of water in the filtration waterway is reduced, resulting in a low efficiency of the water filtration cycle. Therefore, when the opening area of the water inlet hole 4 is 10% to 50% of the cross-sectional area of the concave portion located in the plane where the opening of the water inlet hole 4 is located, the water inlet hole 4 can make the operation of the water filtration channel of the water pump not affected. As much water as possible after cooling the motor can flow back into the chamber 1 from the water inlet 4 to ensure that the temperature of the water in the water pump is not too high. In this embodiment, the water inlet hole 4 is a circular hole, and the diameter of the water inlet hole 4 is 2 mm˜6 mm. The spacing between the water inlet holes 4 is 5 mm to 15 mm. When the spacing between the water inlet holes 4 is less than 5 mm, too many water inlet holes 4 are provided on the volute 14 , and the volute 14 has too many openings, which is easy to reduce the structural strength of the volute 14 . In addition, the arrangement of the water inlet holes 4 is too dense, which will affect the effect of the impeller 19 to generate negative pressure, resulting in an excessively small amount of water in the water inlet 3 and reducing the amount of water in the filtered water channel. When the distance between the water inlet holes 4 is greater than 15mm, the amount of water flowing into and out of the water cooling space will be too small, and the circulation of the water cooling main circuit will be too slow, thereby reducing the efficiency of cooling the motor. Therefore, when the distance between the water inlet holes 4 is kept between 5mm and 15mm, the circulation efficiency of the main water cooling circuit can be improved as much as possible without affecting the flow of the filtering water circuit. Make the cooling of the motor as effective as possible.

The number of the first notches 6 is at least one. Preferably, the number of the first gaps 6 is two or more, and more water at the water outlet 5 can flow into the water cooling cavity 24, thereby increasing the water volume of the water cooling main circuit and improving the cooling rate of the motor. In this embodiment, the number of the first notches 6 is two. In practical applications, the positions of the first notches 6 can be staggered. In this embodiment, the first gaps 6 are symmetrically arranged on both sides of the water outlet 5, which can further increase the quantity of water flowing out from the water outlet 5, increase the water flow of the first gap 6, and speed up the water circulation. The sizes of the two first notches 6 are the same. The opening area of the first notch 6 is 0.7 mm ² to 176 mm ² . When the opening of the first notch 6 is too small, the water flow rate of the first water channel is too small, which affects the water circulation effect of the water cooling circulation main circuit. When the opening of the first notch 6 is too large, the amount of water discharged from the water outlet 5 through the water outlet 21 is small, which affects the operation of the filtering water channel. When the opening area of the first notch 6 is in the range of 0.7 mm ² to 176 mm ² , the maximum flow rate of the water cooling circulation main circuit and the filtering water circuit can be ensured at the same time, and the water cooling circulation and water filtration efficiency can be accelerated.

Specifically, the outer circumference of the volute body 14 has at least two connecting protrusions 10 extending along its radial direction, and recesses 7 are formed between the connecting protrusions 10 . Since the volute body 14 is installed in the casing 15 and connected to the filter device 16, in order to allow the water flow to return to the chamber 1, there must be a second flow of water between the volute body 14 and the casing 15 through which the water flow passes. aisle. The connecting convex portion 10 is provided on the outer periphery of the volute body 14 to form the concave position 7, which can leave a second water flow channel between the volute body 14 and the casing 15 without affecting the volume of the chamber 1, so as to form a Water cooling main road. The water in the water cooling chamber 24 can flow into the gap through the second water flow channel between the recess 7 and the housing 15 , enter the chamber 1 and the spiral flow channel 2 from the water inlet hole 4 , and flow from the water outlet through the water outlet 5 . 21 discharge.

As shown in FIG. 5 and FIG. 6 , the water pump further includes a connecting piece 26 disposed between the volute and the motor housing 17 , and the volute and the housing 171 are connected by the connecting piece 26 . In order to facilitate connection, as shown in FIGS. 1 and 4 , the volute body 14 is provided with a limit slot 18 along its axial direction. The limit slot 18 is used for positioning and matching with the connecting piece 26 to ensure that the coaxiality of the volute body 14 , the connecting piece 26 and the motor housing 17 is consistent. In this embodiment, there are several limit slots 18 , and the plurality of limit slots 18 are evenly distributed on one side of the volute body 14 close to the connecting piece 26 with the center of the water inlet 3 as the center. The limit slot 18 is composed of two limit protrusions 11 . The limiting protrusions 11 extend along the axial direction of the volute body 14 , and the two limiting protrusions 11 are arranged side by side on the same straight line.

More specifically, as shown in FIGS. 1 and 4 , the side of the volute body 14 close to the connecting piece 26 is provided with the connecting pipe 12 . The connecting pipe 12 is provided on the second half-shell 142 . The first end of the connecting pipe 12 communicates with the chamber 1 . The shape of the connecting pipe 12 is cylindrical. The end surface of the second end portion of the connecting pipe 12 in this embodiment is in contact with the housing 171 . In other embodiments, the end of the second end portion of the connecting pipe 12 may also abut against the inner shell 172 . By arranging the connecting pipe 12 , it is convenient for the manufacturer to position and install the volute and the motor casing 17 .

The above-mentioned main circuit of the water cooling cycle can cool down the motor, but there is still room for optimization in this solution. In order to speed up the circulation of water flow, a second notch 13 is provided on the second end of the connecting pipe 12 , and the second notch 13 is recessed along the axis direction of the connecting pipe 12 . The second gap 13 and the housing 171 form a third water flow channel, and the third water flow channel communicates with the water cooling chamber 24 and the chamber 1 respectively. A part of the water in the water cooling cavity 24 can flow into the connecting pipe 12 from the second gap 13 . In order to speed up the water-cooling cycle, the pump can also add a water-cooling cycle auxiliary circuit. As shown in FIG. 7 , the wheel housing 192 of the impeller 19 of the water pump is provided with a water flow through hole 25 , and the third water flow channel communicates with the chamber 1 through the water flow through hole 25 . A part of the water in the water-cooling chamber 24 flows into the water-cooling circulation auxiliary circuit. The water cooling circulation auxiliary circuit is as follows: a part of the water in the water cooling cavity 24 flows into the connecting pipe 12 through the second gap 13 , enters the impeller 19 through the water through hole 25 , is thrown out by the impeller 19 , and is discharged from the water outlet 5 and the water outlet 21 . By setting the second gap 13 on the connecting pipe 12, the volute can form a water cooling circulation auxiliary circuit with other parts of the water pump after being installed on the water pump, making full use of the filtered water to cool the motor, further speeding up the water circulation efficiency and improving the cooling effect. rate.

Optionally, the opening area of the second notch 13 is 0.7 mm ² to 176 mm ² , which can improve the circulation efficiency of the water cooling circulation auxiliary circuit without affecting the water intake of the water pump. When the opening area of the second notch 13 is less than 0.7 mm ² , the circulation efficiency of the water-cooling circulation auxiliary circuit is too low, and the effect of the water-cooling circulation auxiliary circuit is small. When the opening area of the second notch 13 is larger than 176 mm ² , the negative pressure effect generated when the impeller 19 rotates becomes smaller, which affects the water intake of the pump. In this embodiment, the width of the second notch 13 is 3 mm˜8 mm. The shape of the second notch 13 is not limited. The number of the second notches 13 is at least two. If the number of the second gap 13 is only one, the amount of water in the auxiliary circuit of the water cooling circulation is small. The number of the second notches 13 in this embodiment is two. The second notches 13 are symmetrically arranged along the axis of the connecting pipe 12 , which can increase the water flow of the water cooling circulation auxiliary circuit as much as possible without affecting the filtering water circuit.

In order to solve the same technical problem, the present invention also provides a water pump, which includes the volute in any of the above technical solutions. By adopting a volute with a new structure, the water pump can achieve a better heat dissipation effect without adding a heat dissipation device, thereby effectively reducing the cost of the water pump.

The working process of the present invention is as follows: the volute body 14 includes a first half-shell 141 and a second half-shell 142, and the first half-shell 141 and the second half-shell 142 are connected to form the chamber 1 and the spiral flow together. Road 2. The water inlet 3 , the water inlet hole 4 and the connection position 8 are all arranged on the first half-shell 141 , and the connecting pipe 12 and the limit slot 18 are all arranged on the second half-shell 142 . Both the first half-shell 141 and the second half-shell 142 are provided with recesses 7 , and the positions of the recesses 7 correspond to each other. After the volute is installed on the water pump, the connection position 8 of the first half-shell 141 is clearance fit and connected with the water outlet 23 of the filter device 16 . The water outlet 5 corresponds to the position of the water outlet 21 . The second half casing 142 is connected to the motor casing 17 . The connecting pipe 12 is abutted on the casing 171, and the water cooling cavity 24 is communicated with the first flowing water channel and the second flowing water channel, respectively.

In the working state, the material enters the filter device 16 from the first feed end 20 through the second feed end 22 , the filtered water enters the water inlet 3 from the water outlet 23 , passes through the chamber 1 and the spiral flow channel 2 from the outlet The water outlet 5 is discharged, and a part of the water is discharged from the water outlet 21 to form a filtered water channel. Another part of the water enters the water-cooling cavity 24 from the first gap 6, and a part of the water in the water-cooling cavity 24 enters the gap through the recess 7, and enters the cavity 1 and the spiral flow channel 2 through the water inlet hole 4, and passes through the water outlet 5. The water outlet 21 is discharged to form the main circuit of the water cooling cycle. Another part of the water in the water cooling chamber 24 enters the connecting pipe 12 from the second gap 13, passes through the water through holes 25 on the impeller 19, enters the chamber 1, and is thrown out by the blades 193 to the water outlet 5 to form a water cooling circulation auxiliary circuit.

To sum up, the embodiments of the present invention provide a volute and a water pump with the volute. The outer periphery of the water inlet of the volute body is provided with a connection position that fits with the water outlet of the filter device, so that the connection position and the water outlet are connected. There is a gap through which the water flow can pass. By providing a first gap at the water outlet of the volute body, a first water flow channel is formed between the first gap and the casing. By providing a recess on the outer periphery of the volute, a second water flow channel is formed between the recess and the casing. After the volute is installed on the water pump, when the water pump is working, the material enters the chamber and the spiral flow channel from the water inlet in sequence, and flows to the water outlet, and a part of the water in the water outlet is discharged to complete the filtration water path. The water located in the other part of the water outlet cools the motor through the first gap, absorbs the heat of the motor, enters the chamber and the spiral flow channel from the recess through the gap and the water inlet hole, and is discharged from the water outlet to complete the water cooling cycle. By opening holes and recesses at specific positions of the volute body, the water pump is formed with two water paths, a filtering water path and a water cooling circulation main path, during operation. The volute has a simple structure and can be preferably used in a water pump. After the volute is installed on the water pump, the water can be used to cool the motor, and there is no need to install a heat dissipation device for the motor to dissipate heat, which simplifies the internal structure of the water pump, achieves better heat dissipation effect of the water pump, and effectively reduces the cost of the water pump.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the technical principles of the present invention, several improvements and replacements can be made. These improvements And replacement should also be regarded as the protection scope of the present invention.

Claims

A volute is characterized in that it comprises a volute body, the volute body is provided with a chamber and a spiral flow channel communicating with the chamber, the chamber has a water inlet and at least one water inlet is provided in the inlet. A water inlet hole on the outer periphery of the water inlet, the outer periphery of the water inlet is also provided with a connection position for clearance fit with the water outlet end of the filter device, the spiral flow channel has a water outlet, and at least one side of the water outlet is provided with a first A notch is provided on the outer periphery of the volute body with a concave position.
The volute according to claim 1, wherein the number of the water inlet holes is several, and each of the water inlet holes is evenly distributed on the outer circumference of the water inlet.
The volute according to claim 1, wherein the connection position is a concave portion for clearance fit with the water outlet end of the filter device, the concave portion is concave inward along the axis direction of the volute body, and the A water inlet hole is provided on the concave portion.
The volute according to claim 3, characterized in that, the volute body is provided with two rings of annular protrusions outward along the axis direction thereof, and the concave portion is formed between the annular protrusions.
The volute according to claim 3, wherein the sum of the opening areas of the water inlet holes is 10% to 50% of the cross-sectional area of the concave portion located in the plane where the water inlet holes are opened.
The volute according to claim 1, wherein the opening area of the first notch is 0.7 mm 2 to 176 mm 2 .
The volute of claim 1, wherein the number of the first notches is at least two.
The volute according to claim 7, wherein each of the first notches is symmetrically arranged on both sides of the water outlet.
The volute according to claim 1, wherein the outer circumference of the volute body has at least two connecting protrusions extending along its radial direction, and the concave positions are formed between the connecting protrusions.
The volute according to claim 1, characterized in that, the volute body is provided with a limit slot along its axial direction.
The volute according to claim 1, wherein a connecting pipe is provided on one side of the volute body, and the first end of the connecting pipe communicates with the chamber.
The volute according to claim 11, wherein a second notch is formed on the second end of the connecting pipe, and the second notch is recessed along the axis direction of the connecting pipe.
The volute according to claim 12, wherein the opening area of the second notch is 0.7 mm 2 to 176 mm 2 .
The volute of claim 12, wherein the number of the second notches is at least two.
The volute according to claim 14, wherein each of the second notches is symmetrically arranged along the axis of the connecting pipe.
The volute according to any one of claims 1-15, wherein the volute body comprises a first half casing and a second half casing connected with the first half casing.
The volute according to any one of claims 1-15, wherein the material of the volute body is plastic.
A water pump, characterized by comprising the volute according to any one of claims 1-17.