CN112746989B - Pump with a pump body - Google Patents

Abstract

The invention discloses a pump, which comprises a pump shell, a water distribution disc, a motor, a heating assembly, a bushing and an impeller, wherein the pump shell is provided with a pump cavity, and a water inlet and a water outlet which are both communicated with the pump cavity are arranged on the pump shell; the bushing is installed in the pump shell and comprises a first bushing body and a second bushing body, the first bushing body is provided with a first inner cavity, the second bushing body is provided with a second inner cavity, the first bushing body is connected to one end of the second bushing body, the inner cavity of the first bushing body is communicated with the inner cavity of the second bushing body, the second bushing body is provided with a bushing water inlet, the bushing water inlet is communicated with the water inlet, the first bushing body is provided with a bushing water outlet, the bushing water outlet is communicated with the water outlet through a pump cavity, the first bushing body comprises a first wall, the first wall extends in a spiral mode around the first bushing body, the first wall comprises a first section and a second section, the first section is provided with a spiral starting end of the first wall, and the second section is provided with a spiral tail end of the first wall, wherein the curvatures of the first section and the second section are different. The pump of the present invention has a small amount of backflow.

Description

Pump with a pump body

Technical Field

The present invention relates to pumps, and more particularly to pumps having bushings.

Background

Household appliances such as dishwashers often require a power system to work in concert with a heating system to provide delivery power to the medium while heating the medium. The pump is used as a power system to provide conveying power for the medium, so that the washing process is convenient to complete.

In the related art, a pump includes a motor portion and a pump body portion, the pump body includes a pump casing, an impeller, and a liner, a pump chamber accommodating the impeller is provided in the pump casing, and work is applied to a liquid by rotation of the impeller, thereby enabling the liquid to obtain energy. The bushing is provided with a spiral flow guide surface, the curvature of the flow guide surface is kept constant, a part of liquid can be pumped out of the water outlet and the other part of liquid can be returned.

Disclosure of Invention

To this end, the invention proposes a pump which returns less fluid.

A pump according to an embodiment of the first aspect of the invention, comprising:

the pump shell is provided with a water inlet, a water outlet and a pump cavity, wherein the water inlet is communicated with the pump cavity, and the water outlet is communicated with the pump cavity; and

the lining, the lining assemble in the pump case, the lining at least partly install in the pump intracavity, the lining includes first cover body and second cover body, first cover body is equipped with first inner chamber, second cover body is equipped with the second inner chamber, first cover body connect in the one end of second cover body, first inner chamber of first cover body with the second inner chamber intercommunication of second cover body, the second cover body is equipped with the lining water inlet, the lining water inlet with the water inlet intercommunication, first cover body is equipped with the bush delivery port, the bush delivery port passes through pump chamber and delivery port intercommunication, first cover body includes first wall, first wall is around first cover body is the spiral and extends, first wall includes first section and second section, first section is equipped with the spiral top of first wall, the second section is equipped with the spiral end of first wall, wherein first section and the curvature of second section is different.

According to the application, by arranging the curvatures of the first section and the second section in the pump shell, the liquid can be guided to flow according to the direction when flowing out of the bushing, so that the backflow fluid is effectively reduced.

In some embodiments, the spiral end is closer to the liner water inlet than the spiral start, the first section is a smooth plane, the second section is a smooth plane, a connecting portion is arranged between the first section and the second section, the first section and the second section are connected through the connecting portion, and the curvature of the first section is larger than that of the second section.

In some embodiments, the pump housing includes a peripheral wall surrounding the pump chamber, the first sleeve includes a second wall, the second wall conforming to the peripheral wall of the pump chamber, the second wall being located at an outer end of the first sleeve, the second wall being connected to an outer edge of the first wall, the first section includes an outer side connected to the second wall and an inner side located between the second wall and the second sleeve, the inner side being higher than the outer side in a direction from the first sleeve to the second sleeve such that the first section is disposed obliquely with respect to the second wall.

In some embodiments, the angle between the outer wall surface of the first section and the outer wall surface of the second wall is an obtuse angle.

In some embodiments, the liner water outlet is in communication with the first interior cavity of the first sleeve body and the pump cavity, the liner water inlet is in communication with the second interior cavity of the second sleeve body and the water inlet, and the liner water outlet is at least one.

In some embodiments, the number of the bushing water outlets is two, and the two bushing water outlets are distributed on two opposite sides of the central axis of the first sleeve body.

In some embodiments, the first sleeve body is provided with a third wall, the third wall is a smooth plane, the third wall is connected between the second sleeve body and the first wall, the third wall is provided with a boss, the boss is connected between the second sleeve body and the second wall, the boss is connected to the outer wall surface of the water outlet of the liner, the number of the bosses is two, and the two bosses are distributed on two opposite sides of the central axis of the first sleeve body.

In some embodiments, the second wall of the liner is provided with at least one detent, and the inner wall of the pump casing is provided with at least one detent, and the detent cooperates with the detent to positionally connect the liner with the pump casing.

In some embodiments, the positioning grooves are formed in the second wall and are close to the water outlet of the liner, the at least one positioning groove is two, the two positioning grooves are distributed on two opposite sides of the central axis of the first sleeve body, the at least one positioning table is two, the two positioning tables are distributed on two opposite sides of the central axis of the first sleeve body, and each positioning table is matched with each corresponding positioning groove.

In some embodiments, the pump comprises: the heating assembly is fixedly connected with the pump shell and comprises a heat conducting disc and a heating element, the heat conducting disc is fixed on the peripheral wall of the pump shell, the heating element is fixed on the outer end face of the heat conducting disc, the heating assembly further comprises a temperature controller, a fuse and a heat conducting rod, the temperature controller and the fuse are arranged on the outer end face of the heat conducting disc and are electrically connected with the heating element through the heat conducting rod, the water inlet is arranged at the central axis of one end of the pump shell, and the water outlet and the heating assembly are arranged on two opposite sides of the peripheral wall of the pump shell; the motor is at least partially arranged in the first inner cavity of the first sleeve body and is used for driving water to flow into the pump cavity from the water inlet through the bushing and to be discharged through the water outlet; the impeller is at least partially accommodated in the inner cavity of the first sleeve body and is connected with the motor; the bearing support is positioned between the impeller and the motor and is attached to the bottom surface of the first sleeve body of the bushing.

Drawings

FIG. 1 is a perspective view of a pump according to an embodiment of the invention;

FIG. 2 is a cross-sectional view of the pump shown in FIG. 1;

FIG. 3 is an exploded view of the pump shown in FIG. 1;

FIG. 4 is an exploded view of the pump casing and liner shown in FIG. 3;

FIG. 5 is a perspective view of the bushing shown in FIG. 4;

FIG. 6 is another perspective view of the bushing shown in FIG. 5;

FIG. 7 is a perspective view of the pump housing shown in FIG. 3;

FIG. 8 is an enlarged partial view of the portion of circle A shown in FIG. 6;

FIG. 9 is an enlarged partial view of the portion of circle B shown in FIG. 7;

FIG. 10 is a schematic diagram of the pressure field flowing within a related art pump;

FIG. 11 is a schematic diagram of the pressure field flowing within a pump according to an embodiment of the invention;

reference numerals:

pump housing 1, pump chamber 11, intake chamber 111, pumping chamber 112, water inlet 12, water outlet 13, impeller 2, bearing holder 3, bearing retainer 31, sealing plate 32, connection 33, heating element 4, heat conducting plate 41, heating element 42, temperature controller 43, heat conducting rod 45, fuse 44, motor 5, stator 51, rotor 52, motor shaft 53, bearing 54, bushing 6, positioning groove 61, positioning table 603, first sleeve 62, first inner chamber 620, first wall 621, second wall 622, third wall 623, first section 6211, second section 6212, second sleeve 63, second inner chamber 630, bushing water outlet 64, bushing water inlet 65, boss 66, water distribution plate 7, cylinder 71, flange 72, cooling chamber 74, casing 8.

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 by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

As shown in fig. 1 to 11, the pump according to the embodiment of the present invention includes a pump casing 1, an impeller 2, a bearing bracket 3, a heating assembly 4, a motor 5, a liner 6, and a water distribution plate 7, wherein the pump casing 1 has a pump chamber 11, the water distribution plate 7 is provided at one end of the pump casing 1 (the left end of the pump casing 1 shown in fig. 2), and the heating assembly 4 is provided at the other end of the pump casing 1 (the upper end of the pump casing 1 shown in fig. 2), that is, the water distribution plate 7, the pump casing 1, and the heating assembly 4 define the pump chamber 11. In other words, as shown in fig. 2, the left end of the pump casing 1 is connected to the water distribution tray 7, the upper end of the pump casing 1 is connected to the heating unit 4, the water distribution tray 2 and the heating unit 4 respectively close the left and upper ends of the pump casing 1 to define a pump chamber 11 within the pump casing 1, wherein the axial direction of the pump casing 1 is in the left-right direction, and the liner 6 is assembled to the pump casing 1 and is at least partially installed within the pump chamber 11.

The pump shell 1 is provided with a water inlet 12 and a water outlet 13, the water inlet 12 and the water outlet 13 are communicated with the pump cavity 11, and the axial direction of the water outlet 13 and the axial direction of the water inlet 12 are orthogonal to each other. The water inlet 12 is communicated with the pump cavity 11, and the water outlet 13 is communicated with the pump cavity 11. External water enters the pump cavity 11 through the water inlet 12 and is discharged through the water outlet 13.

The motor 5 includes a stator 51 and a rotor 52, the rotor 52 is provided in the water distribution tray 7, and the stator 51 is located outside the water distribution tray 7 and provided at the outer circumference of the rotor 52 to form a magnetic force. Specifically, the water separation disc 7 includes a cylinder 71 and a flange 72, the first section of the cylinder 71 (the left end of the cylinder 71 shown in fig. 2) is closed, the flange 72 extends outward in the radial direction of the cylinder 71 from the outer periphery of the second section of the cylinder 71 (the right end of the cylinder 71 shown in fig. 2), the flange 72 is connected to the pump casing 1, the rotor 52 is provided inside the cylinder 71, and the stator 51 surrounds the outer periphery of the cylinder 71. Further, as shown in fig. 2, the right end of the stator 51 is connected to the flange 72, and the left end of the stator 51 is connected to the housing 8. The bearing 54 is mounted on the bearing bracket 3, and the bearing 54 is used for supporting the motor shaft 53, i.e. the outer ring of the bearing 54 is relatively fixed with the bearing bracket 3, and the inner ring of the bearing 54 is relatively fixed with the motor shaft 53.

In other words, as shown in fig. 2, the left end of the pump housing 1 is connected to the flange 72 of the water distribution tray 7, the left end of the cylinder 71 is closed, the right end of the cylinder 71 is opened, the rotor 52 is provided inside the cylinder 71, i.e., the motor 5 is provided at the left end in the pump chamber 11, the motor 5 is provided at the middle thereof with the motor shaft 53 extending axially and rotatably, the left end of the motor shaft 53 is provided inside the cylinder 71, the right end of the motor shaft 53 is penetrated from the right end of the cylinder 71 and connected to the impeller 2 in the pump chamber 11, and the stator 51 is provided around the outer circumference of the cylinder 71 and connected to the left end face of the flange 72. Specifically, a seal (not shown), which may be, for example, an O-ring seal, is provided between the water distribution disc 2 and the first section of the pump casing 1, and the present invention is not limited thereto.

It can be understood that the rotor 52 is arranged in the water distributing disc 7, the motor 5 can be cooled by the water in the pump, and the cooling efficiency of the motor is improved; the impeller 2 is driven to rotate by the motor shaft 53 of the motor 5, so that the impeller 2 drives the water flow in the pump cavity 11 to rotate, the impeller 2 does work on the water flow, the water flow is enabled to obtain energy to flow out, and at the moment, the kinetic energy and the pressure energy of the water flow are both increased.

The bearing bracket 3 is connected with the water distributing disc 7, the bearing bracket 3 and the water distributing disc 7 jointly define a cooling cavity 74, cooling water is filled in the cooling cavity 74, and the cooling water in the cooling cavity 74 can play a good role in cooling the rotor 52. The bearing holder 3 has an exhaust hole (not shown) for exhausting the gas in the cooling chamber 74. Thus, when cooling water flows into the cooling chamber 74, the gas in the cooling chamber 74 is gradually discharged through the exhaust hole as the cooling water flows in, the flange 72 of the bearing bracket 3 is connected to the motor shaft 53, that is, the bearing bracket 3 has a relief hole, and one end of the motor shaft 53 extends into the cooling chamber 74 through the relief hole to be fixed to the rotor 52. The bearing bracket 3 comprises a connecting part 33, a sealing plate 32 and a bearing limit seat 31 which are sequentially connected along the radial direction, wherein the connecting part 33, the sealing plate 32 and the bearing limit seat 31 can be integrally formed, so that the overall structural strength of the bearing bracket 3 is conveniently improved. The connecting part 33 and the first bearing limit seat 31 are both annular, the connecting part 33 is connected with the water distribution disc 7, and the periphery of the connecting part 33 is connected with the water distribution disc 7 in a sealing way.

The bushing 6 is installed in the pump chamber 11 and connected with the water inlet 12 for dividing the pump chamber 11 into a water inlet chamber 111 and a water pumping chamber 112, wherein the water inlet chamber 111 is adjacent to the water inlet 12, the water inlet chamber 111 is communicated with the water pumping chamber 112, and the bushing water outlet 64 of the bushing 6 is communicated with the water inlet chamber 111 and the water pumping chamber 112. In other words, as shown in fig. 2, the liner 6 is provided at the left end inside the pump chamber 11, and divides the pump chamber 11 into the intake chamber 111 and the pumping chamber 112 that communicate with each other, and the pumping chamber 112 is more adjacent to the heating element 4 than the pumping chamber 112, i.e., the pump chamber 11 includes the intake chamber 111 in which the liner 6 communicates with the water inlet 12 and the pumping chamber 112 in which the liner 5 communicates with the water outlet 13. Specifically, the impeller 6 is provided in the pumping chamber 112.

According to the pump provided by the embodiment of the invention, the pump cavity 11 can be divided into the water inlet chamber 111 and the water pumping chamber 112 which are communicated with each other by arranging the bushing 6, the pump cavity can be matched with the impeller 6 to be used as an energy conversion device of water flow, the kinetic energy and the pressure energy of the water flow are improved, and the pump is compact in structure and applicable to occasions with limited space; by providing a substantially cylindrical water distribution tray 7, the rotor 52 is arranged in the water distribution tray 7 and the stator 51 is positioned outside the water distribution tray, and the motor 5 can be cooled by water in the pump, so that the cooling efficiency of the motor 5 is improved.

In some embodiments, as shown in fig. 2 and 4-7, the liner 6 includes a first sleeve body 62 and a second sleeve body 63, a portion of the pump chamber 11 located on a first side of the liner 6 (the right side of the liner 6 is communicated with the water inlet pipe 12) forms a water inlet chamber 111, a portion of the pump chamber 11 located on a second side of the liner 6, the upper side and the lower side of the liner 6 are communicated with the water outlet pipe, and a portion near the heating assembly 4 forms a water pumping chamber 111, the second sleeve body 63 is provided with a liner water inlet 65, the liner water inlet 65 is communicated with the water inlet 12, two liner water outlets 64 are provided on the first sleeve body 62, the two liner water outlets 64 are uniformly provided on the liner 6, and the two liner water outlets 64 are distributed on opposite sides of a central axis of the first sleeve body 62. The liner 6 is provided with a liner water inlet 65, the liner water inlet 65 being in communication with the pump housing water inlet 12, it being understood that the liner water inlet 65 is in communication with the water inlet 12, in particular, the liner water outlet 64 may be provided as at least one, and for practical purposes, the liner water outlet 64 may be provided as two, three or four or more.

In some embodiments, the first sleeve 62 has a first interior 620 and the second sleeve 63 has a second interior 630, the first sleeve 62 is connected to one end of the second sleeve 63, the first interior 620 of the first sleeve is in communication with the second interior 630 of the second sleeve, and the other end of the second sleeve 63 is in communication with the water inlet 12. The bottom surface of the bushing 6, i.e. the surface close to the motor 5 is attached to the connecting portion 33 of the bearing bracket 3, in other words, the bottom surface of the first sleeve 62 is attached to the connecting portion 33 of the bearing bracket 3, the first inner cavity 620 of the first sleeve 62 is communicated with the water inlet 12, and the second inner cavity 630 of the second sleeve 63 is communicated with the water outlet 13.

As shown in fig. 5, the first sleeve 62 includes a first wall 621, the first wall 621 is located at an outer periphery of the first sleeve 62, the first wall 621 extends substantially spirally around the first sleeve 62, the size in the axial direction gradually increases, and the first wall 621 is provided at a left end of the first sleeve 62, and is provided near the second sleeve 63.

Specifically, the first wall 621 is two substantially spirally extending first walls 621, one substantially spirally spirals from left to right, the other substantially spirals from right to left, the first walls 621 gradually increase in size in the direction of spirally extending, one substantially spiral starting end is connected to the other substantially spiral ending end, one substantially spiral ending end is connected to the other substantially spiral starting end, and corresponds to the two liner water outlets 64 provided in the first casing 62, one spiral starting end is adjacent to one liner water outlet 64, and the other spiral starting end is adjacent to the other liner water outlet 64. The spiral end is closer to the liner water inlet 65 than the spiral start, the two liner water outlets 64 are symmetrically disposed about the central axis of the first sleeve 62, and similarly, the two spiral extending first walls 621 are distributed on opposite sides of the central axis of the first sleeve 62, in other words, the two spiral extending first walls 621 are symmetrically disposed about the central axis of the first sleeve 62, and the number of liner water outlets 64 is identical to the number of first walls 621.

The first wall 621 includes a first segment 6211 and a second segment 6212, the first segment 6211 is provided with a spiral start end of the first wall 621, the second segment 6212 is provided with a spiral end of the first wall 621, in other words, the first segment 6211 is close to the spiral start end of the first wall 621, the second segment 6212 is close to the spiral end of the first wall 621, curvatures of the first segment 6211 and the second segment 6212 are different, the first segment 6211 is a smooth plane, the second segment 6212 is a smooth plane, a connection part is provided between the first segment 6211 and the second segment 6212, the first segment 6211 and the second segment 6212 are connected through the connection part, the curvature of the first segment 6211 is larger than the curvature of the second segment 6212, a substantially folded line shape is formed between the first segment 6211 and the connection part, the connection part is a lowest folded line shape, and the connection part is smoothly connected between the first segment 6211 and the second segment 6212 through the connection part so that backflow water is reduced, and energy loss is reduced.

The pump housing 1 includes a peripheral wall surrounding the pump chamber 11, the first casing 62 includes a second wall 622, the second wall 622 is fitted to the peripheral wall of the pump chamber 11, the second wall 622 is located at an outer end of the first casing 62, the second wall 622 is connected to the first wall 621, the curvature of the first section 6211 is a variable curvature, and the curvature of the first section 6211 gradually increases in a direction approaching the second wall 622. Water enters the pump from the water inlet 12, then enters the liner 6 through the liner water inlet 65 into the first inner cavity 620 of the first sleeve 62, then enters the second inner cavity 630 of the second sleeve 63, flows from the spiral start to the spiral end of the first wall 62, then flows out of the liner from the liner water outlet 64, is heated by the heating assembly 4, and flows out of the pump from the water outlet 13. Further, the liner water inlet 65 is provided on the central axis of the liner 6, and more specifically, the liner 6 and the pump casing 1 are coaxially provided.

Specifically, to clearly describe the liner structure, the first casing 62 includes a first wall 621, a second wall 622 and a third wall 623, the second wall 622 is connected to the first wall 621, the first wall 621 is connected to the third wall 623, the direction in which the second wall 622 is located is substantially parallel to the direction in which the central axis of the second casing 63 is located, the second wall 622 is in contact with the peripheral wall of the pump casing 1, and the second wall 622 is annular. The first wall 621 comprises a first segment 6211 and a second segment 6212, the first segment 6211 and the second segment 6212 are connected, the first wall 621 is substantially spiral, the first segment 6211 of the first wall 621, i.e. the spiral start of the first wall 621, is close to the liner water inlet 65, spirals in a left-to-right direction, the second segment 6212, i.e. the spiral end, of the first wall 621 is close to the liner water outlet 64, in other words, the spiral end is closer to the liner water inlet 65 than the spiral start, further, the first wall 621 is gradually spiral in an axial direction along the direction of spiral extension. It will be appreciated that the first wall 621, the second wall 622 and the third wall 623 may be integrally formed or may be separately formed, and the first section 6211 and the second section 6212 may be integrally formed or may be separately formed and may be connected to each other by a connecting member.

More specifically, the first wall 621 includes a first section 6211 and a second section 6212, the first section 6211 is provided smoothly, the second section 6212 is provided smoothly, the first section 6211 and the second section 6212 are connected by a connection portion, and the connection portion is substantially folded so that the curvature of the first section 6211 is different from the curvature of the second section 6212, thereby reducing the water generating backflow, reducing the energy loss, and improving the overall efficiency of the water pump. Further, the curvature of the first segment 6211 is greater than the curvature of the second segment 6212, specifically the curvature of the first segment 6211 is a fixed curvature, the curvature of the second segment 6212 is a fixed curvature, the first segment 6211 is inclined in a direction toward the second wall 622, more specifically the first segment 6211 includes an outer side connected to the second wall 622 and an inner side located between the second wall 622 and the second sleeve 63, the inner side being higher than the outer side in a direction from the first sleeve 62 to the second sleeve 63 such that the first segment 6211 is inclined with respect to the second wall 622 such that as fluid flows through the throat of the liner, the pressure differential across the throat is reduced such that the water creating backflow is reduced, the energy loss is reduced, and the overall efficiency of the pump is improved. More specifically, the angle between the outer wall surface of the first segment 6211 and the outer wall surface of the second wall 622 is obtuse, so that the water that is subject to backflow is reduced, the energy loss is reduced, and the overall efficiency of the pump is improved. The terms "first" and "second" are used herein 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 defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

It will be appreciated that external water enters the intake chamber 111 through the water inlet 12 in sequence, water in the intake chamber 111 enters the pumping chamber 112 through the liner water outlet 64, and water in the pumping chamber 11 is discharged through the water outlet 13 of the pump housing in sequence.

It will be appreciated that the liner 6 having the first and second casings 62 and 63 is installed in the pump chamber 11 to divide the pump chamber 11 into the intake chamber 111 and the pumping chamber 112, and that since the first wall 621 of the first casing 62 is in a spiral structure, the volume in the pumping chamber 112 varies in the axial direction, and can enhance the kinetic energy and pressure energy of the water flow when being matched with the impeller 6; and the liner water inlet 65 of the liner 6 is arranged adjacent to the spiral start end of the first wall 621, and the liner water outlet 64 of the liner 6 is arranged at the spiral end of the first wall 621, so that the axial dimension of the pump can be minimized under the condition of ensuring the kinetic energy and the pressure energy of water flow.

In some embodiments, the first casing 62 is provided with a third wall 623, the third wall 623 being a smooth plane, located between the liner water inlet 65 and the first wall 621, and connected to the first casing 62 and the first wall 621, it being understood that the third wall 623 may not be provided, the first wall 621 may be directly connected to the second casing 63, and for structural purposes, the third wall 623 may be provided for connecting the first wall 621 and the second casing 63. More specifically, the third wall 623 is provided with at least one boss 66, the boss 66 is located between the liner water inlet 65 and the liner water outlet 64, and is connected to the outer wall surface of the second sleeve 63 and is connected to the wall surface of the liner water outlet 64, specifically, two bosses 66 are located between the liner water outlet 64 and the liner water inlet 65, and the number of bosses is consistent with the number of liner water outlets 64, and further, a reinforcing rib (not labeled in the figure) may be provided on the outer wall surface of the second sleeve 63 to enhance the stability of the liner structure.

Further, the second wall 622 of the liner 6 is provided with at least one positioning groove 61, the inner wall of the pump casing is provided with at least one positioning table 603, the positioning groove 61 is concavely arranged inwards relative to the second wall 622, the positioning table 603 is clamped in the positioning groove 61, and the positioning groove 61 is matched with the positioning table 603, so that the liner 6 is fixedly connected with the pump casing 1. Further, the second wall 62 is provided with two positioning grooves 61, the inner wall of the pump casing is provided with two positioning tables 603, the positioning grooves 61 are close to one side of the water outlet 64 of the liner, the two positioning grooves 61 are uniformly distributed on the second wall 622 of the liner, the two positioning tables 603 are uniformly distributed on the inner wall of the pump casing 1, the positioning tables 603 are clamped in the positioning grooves 61, the positioning tables 603 are matched with the positioning grooves 61, in other words, the two positioning grooves 61 are distributed on the second wall 622 of the liner 6 on two opposite sides of the central axis of the first sleeve 62, the two positioning grooves 61 are symmetrically arranged about the central axis of the first sleeve 62, the two positioning tables 603 are distributed on two opposite sides of the central axis of the first sleeve 62 on the inner wall of the pump casing 1, and the two positioning tables 603 are symmetrically arranged about the central axis of the water inlet 12. It will be appreciated that when the second wall 632 of the liner 6 is provided with a plurality of positioning grooves 61, one, two or more positioning steps 63 are provided, and the plurality of positioning grooves 61 are arranged at intervals in the circumferential direction of the liner 6, positioning of the liner 6 in the pump chamber 11 can be facilitated by fitting the positioning steps 603 on the inner wall of the pump casing 1 into the positioning grooves 61. More specifically, the liner 6 and the pump casing 1 are coaxially disposed, the inner wall of the pump casing 1 is stepped, and the end of the liner 6 can be fitted at the step to further achieve circumferential positioning of the liner 6, in other words, radial positioning of the liner 6.

The first sleeve 62 includes first wall 621 and second wall 622, and the constant head tank 61 sets up in second wall 622, and constant head tank 61 is the indent setting inwards for second wall 622 to cooperate with positioning table 63, positioning table 63 card locates constant head tank 61, in order to realize the hoop location of bush 6, can realize guaranteeing when the whole pump is assembled that the position of bush can not produce the dislocation because of the relative rotation of motor 5 and pump case 1. The positioning table 63 on the inner wall of the pump shell 1 and the positioning groove 61 on the outer wall of the bushing 6 are in screwed fit to realize the correct installation of parts, the positioning table 63 is additionally arranged on the inner wall of the pump shell 1, the positioning groove 61 is formed on the outer wall surface of the bushing 6, and the sealing effect of the sealing ring can be influenced due to the change of the structure of the pump shell while the positioning is realized.

More specifically, the axial height of the positioning groove 61 is slightly lower than that of the second wall 632, the positioning groove 61 is a square structure groove, the positioning table is a square structure boss, and the groove and the boss are mutually matched to realize positioning of the liner 6 in the pump cavity 11, and the relative position of the liner 6 and the pump shell 1 can not be changed when the pump shell 1 and the motor 5 relatively rotate during whole pump assembly while radial positioning is fixed, so that the hydraulic performance is affected. It is understood that the recess may have other shapes, such as a ring shape or a rectangle shape, and the corresponding boss structure may have a ring shape or a rectangle shape, and it is understood that the present invention is not limited thereto.

Further, one side (upper side shown in fig. 5) of the positioning groove 61 is located on the same plane as the liner water outlet 64 on the outer wall surface, one side (right side shown in fig. 5) of the positioning groove 61 coincides with a part of the outer end of the first wall 621, one side (left side shown in fig. 5) of the positioning groove 61 coincides with the outer end part of the first wall 622, one side (lower side shown in fig. 5) of the positioning groove 61 is located at the outer end of the second wall 622, the length of the positioning groove 61 in the up-down direction is smaller than the length of the first section 6211, and the length of the positioning groove 61 in the left-right direction is smaller than the height of the second wall 622.

In some embodiments, the heating assembly 4 comprises a heat conducting disc 41 and a heating element 42, the heat conducting disc 41 being connected to the second section of the pump housing 1 (upper end of the pump housing 1 shown in fig. 2). In other words, the heat conducting disc 41 is connected to the left end of the pump casing 1, and the heat conducting disc 41 and the pump casing 1 and the water distributing disc 7 at the right end of the pump casing 1 together define the pump cavity 11, the heat conducting disc 41 and the water outlet are arranged on two opposite sides of the peripheral wall of the pump casing, and the included angle between the water outlet and the heat conducting disc is 0-180 degrees. Further, the material of the heat conductive plate 41 is ceramic, and can perform an insulating and heat conductive function. Still further, a seal member, which may be an O-ring seal, is provided between the heat conducting plate 41 and the pump casing 1, it being understood that the invention is not limited thereto.

It will be appreciated that the heat conducting plate 41 is disposed adjacent the inlet chamber 111, and that the heating element 42 and the liquid in the inlet chamber 111 are separated on either side of the heat conducting plate 41, and that heat is transferred through the heat conducting plate 41, thereby improving the safety of electrical conduction and improving the uniformity of heating.

As shown in fig. 3, the heating element 42 is a heating pipe provided on the outer end surface of the heat conducting plate 41, specifically, the heat conducting plate 41 has a recess with an opening facing outward, and the recess is annular extending in the circumferential direction of the heat conducting plate 41, the heating pipe is embedded in the annular recess of the heat conducting plate 41, and the fluid in the pump chamber 11 is heated by the heating pipe on the outer end surface of the heat conducting plate 41. In other words, as shown in fig. 2, the heat conductive plate 41 has a recess recessed rightward, and the recess is provided along a circumference of the heat conductive plate 41 to form a ring shape in which the heating pipe is provided.

Still further, the heating assembly 4 further comprises a temperature controller 43, a fuse 44 and a heat conducting rod 45, wherein the temperature controller 43 and the fuse 44 are arranged on the outer end face of the heat conducting disc 1, and the temperature controller 43 and the fuse 44 are connected with the heating element 42 in series through the heat conducting rod 45. In other words, the left end face of the heat conducting disc 1 is further provided with a temperature controller 43, a fuse 44 and a heat conducting rod 45, wherein the temperature controller 43 is electrically connected with the heating element 42 through one heat conducting rod 45, and the fuse 44 is electrically connected with the heating element 42 through one heat conducting rod 45. Specifically, the thermostat and the fuse are fixed to the outer end surface of the heat conductive plate 41 by fixing members, which may be bolts and nuts, and the present invention is not limited thereto. It will be appreciated that by providing the temperature controller 43 and the fuse 44 on the heat conducting plate 41, the temperature can be monitored in real time, and the safety performance is improved. Further, the thermostat 43 and the fuse 44 are arranged in parallel, and the heat conduction rod 45 connecting the thermostat 43 and the heating pipe and the heat conduction rod 45 connecting the fuse 44 and the heating pipe are arranged substantially in parallel with each other.

A pump according to an embodiment of the present invention is described below with reference to fig. 1-10.

As shown in fig. 1 to 7, the pump according to the embodiment of the present invention includes a pump casing 1, an impeller 2, a bearing bracket 3, a heating assembly 4, a motor 5, a liner 6, and a water diversion disk 7, wherein the left end of the pump casing 1 is connected to the water diversion disk 2, the upper end of the pump casing 1 is connected to the heating assembly 4, and the water diversion disk 2 and the heating assembly 4 respectively close the right end and the upper end of the pump casing 1 to define a pump chamber 11 within the pump casing 1. The pump shell 1 is provided with a water inlet and a water outlet, as shown in fig. 1, the water inlet is arranged in the axial direction of the pump shell 1, the water outlet is arranged on the peripheral wall of the pump shell 1, and the water outlet is arranged at a distance from the heating component 4.

The pump according to the embodiment of the present invention includes a pump casing 1, an impeller 2, a bearing bracket 3, a heating assembly 4, a motor 5, and a liner 6, wherein the pump casing 1 has a pump chamber 11, a water distribution plate 7 is provided at a first section of the pump casing 1 (a left end of the pump casing 1 shown in fig. 2), and the heating assembly 4 is provided at a second section of the pump casing 1 (an upper end of the pump casing 1 shown in fig. 1), that is, the water distribution plate 7, the pump casing 1, and the heating assembly 4 define the pump chamber 11. In other words, as shown in fig. 2, the left end of the pump casing 1 is connected to the water diversion disc 7, the upper end of the pump casing 1 is connected to the heating assembly 4, the water diversion disc 2 and the heating assembly 4 respectively close the left end and the upper end of the pump casing 1 to define a pump cavity 11 in the pump casing 1, the bearing bracket 3 is located between the impeller 2 and the motor 5, and the bearing bracket 3 is attached to the bottom surface of the first sleeve 62 of the bushing 6.

External water enters the pump cavity 11 through the water inlet 12 and is discharged through the water outlet 13, and the axial direction of the water outlet and the axial direction of the water inlet are orthogonal to each other.

The water distribution tray 7 includes a cylindrical body 71, a flange 72, and a cofferdam, the flange 72 extending outwardly from the outer periphery of the left end of the cylindrical body 71 in the radial direction of the cylindrical body 71, the cofferdam extending from the outer periphery of the flange 72 in the axial direction of the cylindrical body 71 toward the left end of the cylindrical body 71, the cofferdam being connected to the left end of the pump casing 1, and an O-ring being provided between the flange 22 and the pump casing 1. The bearing bracket 3 comprises a connecting part 33, a sealing plate 32 and a bearing limit seat 31 which are sequentially connected along the radial direction, and the periphery of the connecting part 33 is connected with the water distribution disc 7 in a sealing way.

The motor 5 includes a stator 51 and a rotor 52, and the motor 5 is provided at the right end in the pump chamber 11, the elbow of the motor 5 is provided with a motor shaft 53 extending axially and rotatable, the left end of the motor shaft 53 and the rotor 52 are provided in the interior of the cylinder 51, the left end of the cylinder 51 is opened, the right end of the cylinder 51 is closed, the right end of the motor shaft 53 penetrates out from the right end of the cylinder 21 and is connected with the impeller 2 in the pump chamber 11, the stator 51 surrounds the periphery of the cylinder 51, the right end of the stator 51 is connected with the left end face of the flange 52, the left end of the stator 51 is connected with the housing 8, and it can be understood that the stator 51 surrounds the periphery of the rotor 52 to form magnetic force. The outer ring of the bearing 54 is relatively fixed with the bearing bracket 3, and the inner ring of the bearing 54 is relatively fixed with the motor shaft 53.

The heating component 4 comprises a heat conducting disc 41, a heating element 42, a temperature controller 43, a fuse 44 and a heat conducting rod 45, wherein the heat conducting disc 41 is connected with the left end of the pump shell 1, the heat conducting disc 41 and the water distributing disc 2 at the right end of the pump shell 1 together define a pump cavity 11, the heat conducting disc 41 is made of ceramic, the heat conducting disc 41 can play a role in insulating heat conduction, and an O-shaped sealing ring is arranged between the heat conducting disc 41 and the pump shell 1.

The heating element 42 is connected to the heat conducting plate 41, and the heating element 42 may be a heating tube (as shown in fig. 3). The upper end surface of the heat conducting disc 41 is also provided with a temperature controller 43, a fuse 44 and a heat conducting rod 45, wherein the temperature controller 43 is connected with the heating element 42 in series through one heat conducting rod 45, and the fuse 44 is connected with the heating element 42 in series through one heat conducting rod 45. By providing the temperature controller 43 and the fuse 44 on the heat conducting plate 41, the temperature can be monitored in real time, and the safety performance is improved. The heat conduction rod 45 connecting the thermostat 43 and the heating pipe and the heat conduction rod 45 connecting the fuse 44 and the heating pipe are disposed substantially parallel to each other.

The liner 6 is assembled in the pump chamber 11 and is arranged adjacent to the water inlet 12, the liner 6 and the pump housing 1 are coaxially arranged, the liner 6 can divide the pump chamber 11 into a water inlet chamber 111 adjacent to the water inlet 12 and a water pumping chamber 112 adjacent to the water outlet 13, and the liner water inlet 65 on the liner 6 can be communicated with the water inlet chamber 111 and the water pumping chamber 112.

The liner 6 is provided with a first liner body 62 and a liner water outlet 64, the first liner body 62 comprises a first wall 621, a second wall 622 and a third wall 623, two liner water outlets 64 are arranged on the liner 6, the two liner water outlets 64 are positioned on the second wall 622, the two liner water outlets 64 are uniformly distributed on the first liner body 62, the two liner water outlets 64 are distributed on two opposite sides of the central axis of the first liner body 62, the bottom surface of the second wall 622 of the liner 6, namely the surface close to the motor 5, is attached to the 2 surface of the connecting part 33 of the bearing bracket 3 close to the impeller, the second wall 622 is attached to the peripheral wall of the pump cavity 11, the second wall 622 is positioned at the outer end of the first liner body 62, and the second wall 622 is connected with the outer edge of the first wall 62.

The bushing 6 is provided with a second sleeve body 63 and a bushing water inlet 65, the bushing water inlet 65 is positioned on the right side on the central axis of the bushing 6, the first wall 621 extends spirally along the axial direction of the bushing 6 and surrounds the periphery of the bushing water inlet 65, the spiral tail end is closer to the bushing water inlet 65 relative to the spiral start end, the spiral start end of the first wall 621 is positioned on one end face of the bushing 6, the spiral tail end of the first wall 621 is positioned on the other end face of the bushing 5, the spiral start end of the first wall 621 is adjacent to the bushing water inlet 65, the spiral tail end of the first wall 621 is positioned at the bushing water outlet 64, the size of the first wall 621 in the axial direction is gradually increased along the direction of spiral extension, the first sleeve body 62 is cut along a plane perpendicular to the axial direction of the bushing 6, and the bottom surface of the first sleeve body 62 is two axially inwards concave between annular and spiral shapes. The liner water inlet 65 is communicated with the water inlet chamber 111 and the water pumping chamber 112, and the liner water inlet 65 is arranged adjacent to the water inlet 12, the outer wall of the second sleeve body 63 is jointed with the inner wall surface of the water inlet 12 so as to enable water to enter the liner 6 from the water inlet 12, and the water is discharged from the water outlet 13 under a certain pressure through the overcurrent effect of the liner 6. The first wall 621 of the first sleeve 62 includes a first segment 6211 and a second segment 6212, the first segment 6211 is close to the spiral start end of the first wall 621, the second segment 6212 is close to the spiral end of the first wall 621, the first segment 6211 and the second segment 6212 are smooth planes and are connected smoothly, the curvature of the first segment 6211 is larger than that of the second segment 6212, more specifically, the first segment 6211 includes an outer side connected to the second wall 622 and an inner side located between the second wall 622 and the second sleeve 63, and the inner side is higher than the outer side in the direction from the first sleeve 62 to the second sleeve 63, so that the first segment 6211 is inclined relative to the second wall 622, and an included angle between the outer wall surface of the first segment 6211 and the outer wall surface of the second wall 622 is an obtuse angle, so as to reduce the back flow of water flowing out from the liner water outlet 64, thereby reducing the energy loss and improving the overall working efficiency of the pump.

The first sleeve 62 is provided with a third wall 623, the third wall 623 being a smooth plane, located between the bushing water inlet 65 and the first wall 621, and connected to the second sleeve 63 and the second wall 622, in order to facilitate the connection of the structures and to fulfill the size requirements. The first wall and the third wall 623 are provided with two bosses 66, and the bosses 66 are positioned between the liner water inlet 65 and the liner water outlet 64, are connected with the outer wall surface of the second sleeve 63, and are connected with the wall surface of the liner water outlet 64, so that the stability of the structure is enhanced.

The second wall 6 of the liner 6 is provided with two positioning grooves 61 positioned at the spiral starting end of the first wall 621, the positioning grooves 61 are arranged in an inward concave manner relative to the second wall 622, the positioning grooves 61 are adjacent to the liner water outlet 64 at the same time, the inner wall of the pump shell 1 is provided with a positioning table 603 matched with the positioning grooves 61, and the positioning table 603 is clamped in the positioning grooves 61. The inner wall of the pump shell 1 is in a step shape, and the end part of the bushing 6 can be matched with the step to further realize the circumferential positioning of the bushing 6 so as to realize the circumferential positioning and radial positioning of the bushing 6, thereby preventing the relative position of the bushing and the pump shell from moving when the pump shell and the motor relatively rotate during the assembly of the whole pump and further preventing the hydraulic performance from being influenced.

The effects of the pump according to the embodiment of the present invention are described below with reference to fig. 10 and 11.

As can be seen by comparing fig. 10 and 11, namely, comparing the pressure field of the pump according to the embodiment of the present invention with the speed field of the existing pump: the curvature of the first segment 6211 of the bushing 6 is greater than the curvature of the second segment 6212, the curvature of the first segment 6211 increasing progressively in a direction toward the second wall 622, reducing the amount of backflow of fluid,

the second wall 622 of the bushing 6 is annular and the velocity of the fluid flowing in the inner cavity 620 of the first sleeve body is gradually increased. When the fluid flows through the diaphragm through the bushing water outlet 64, the fluid flows back to the throat of the diaphragm due to the existence of the pressure difference, and is recombined with the fluid flowing out of the impeller 2, and then energy is lost. The first wall 621 having a substantially spiral shape of the original structure extends with a constant curvature, so that the gap between the partition tongue at the water outlet 64 of the liner is large, the pressure difference at the outlet is large, the area of each flow cross section is equal, the amount of liquid return collected by the liner 6 is large, and the liquid is mixed with the fluid newly discharged from the impeller 2, thereby increasing the energy loss. Therefore, for the liner 6 with a fixed curvature of the first wall 621, when the fluid discharged from the impeller 2 flows in the inner cavity 620 of the first casing, the speed gradually increases, but the energy loss is larger, after the energy conversion of the liner 6, the liquid speed at the section of the liner water outlet 64 is larger, the energy loss generated in the subsequent path is larger, and the overall pump efficiency is reduced. The inner wall surface of the first sleeve 62 treated with different curvatures is between annular and spiral, the tongue-separating gap is reduced by the treatment with different curvatures at the tongue-separating portion, and the differential pressure at the throat of the water outlet 64 of the liner is reduced, so that the reflux amount is reduced, and the loss of the part is reduced. The kinetic energy is relatively smaller after energy conversion through the bushing 6, and the conversion of the kinetic energy to static pressure energy can increase the lift and efficiency of the water pump for the whole water pump.

It can be seen from the pressure field that the variable curvature liner 6 has a small pressure gradient at the liner water outlet 64 and the fixed curvature liner 6 has a larger pressure gradient at the same cross section, so that more energy is lost.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular 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 invention. In this specification, schematic representations of the above terms are not necessarily directed 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, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (10)

1. A pump, comprising:

the pump comprises a pump shell (1), wherein the pump shell (1) is provided with a water inlet (12), a water outlet (13) and a pump cavity (11), the water inlet (12) is communicated with the pump cavity (11), and the water outlet (13) is communicated with the pump cavity (11); and

a liner, the liner (6) being assembled in the pump housing (1), the liner (6) being at least partially mounted in the pump cavity (11), the liner (6) comprising a first sleeve (62) and a second sleeve (63), the first sleeve being provided with a first inner cavity (620), the second sleeve (63) being provided with a second inner cavity (630), the first sleeve (62) being connected to one end of the second sleeve (63), the first inner cavity (620) of the first sleeve being in communication with the second inner cavity (630) of the second sleeve, the second sleeve (63) being provided with a liner water inlet (65), the liner water inlet (65) being in communication with the water inlet (12), the first sleeve (62) being provided with a liner water outlet (64), the liner water outlet (64) being in communication with the water outlet (13) through the pump cavity (11), the first sleeve (62) comprising a first wall (621), the first wall (621) being provided with a first spiral segment (62) extending around the first sleeve (62) and comprising a first spiral segment (62) and a second spiral segment (12), wherein the curvature of the first segment (6211) and the second segment (6212) are different.

2. The pump according to claim 1, characterized in that the screw end is closer to the bushing water inlet (65) than the screw start, the first section (6211) is a smooth plane, the second section (6212) is a smooth plane, a connection is provided between the first section (6211) and the second section (6212), the first section (6211) and the second section (6212) are connected by a connection, and the curvature of the first section (6211) is larger than the curvature of the second section (6212).

3. Pump according to claim 2, wherein the pump housing (1) comprises a peripheral wall surrounding the pump chamber (11), the first sleeve (62) comprises a second wall (622), the second wall (622) is in abutment with the peripheral wall of the pump chamber (11), the second wall (622) is located at the outer end of the first sleeve (62), the second wall (622) is connected to the outer edge of the first wall (621), the first section (6211) comprises an outer side connected to the second wall (622) and an inner side located between the second wall (622) and the second sleeve (63), the inner side being higher than the outer side in the direction from the first sleeve (62) to the second sleeve (63), such that the first section (6211) is arranged obliquely with respect to the second wall (622).

4. A pump according to claim 3, wherein the angle between the outer wall surface of the first section (6211) and the outer wall surface of the second wall (622) is an obtuse angle.

5. The pump of claim 1, wherein the liner water outlet (64) communicates with the first interior cavity (620) of the first sleeve and the pump cavity (11), the liner water inlet (65) communicates with the second interior cavity (630) of the second sleeve and the water inlet (12), and the liner water outlet (64) is at least one.

6. The pump of claim 5, wherein there are two liner water outlets (64), the two liner water outlets (64) being distributed on opposite sides of a central axis of the first sleeve (62).

7. A pump according to claim 3, wherein the first casing (62) is provided with a third wall (623), the third wall (623) being a smooth plane, the third wall (623) being connected between the second casing (63) and the first wall (621), the third wall (623) being provided with a boss (66), the boss (66) being connected between the second casing (63) and the second wall (622), the boss (66) being connected to the outer wall surface of the liner water outlet (64), the bosses (66) being two, the two bosses (66) being distributed on opposite sides of the central axis of the first casing (62).

8. A pump according to claim 3, characterized in that the second wall (622) of the liner (6) is provided with at least one positioning groove (61), the inner wall of the pump casing (1) is provided with at least one positioning table (603), the positioning groove (61) cooperates with the positioning table (603) to position the liner (6) in connection with the pump casing (1).

9. The pump of claim 8, wherein the positioning slots (61) are disposed on the second wall (622) and adjacent to the liner water outlet (64), the at least one positioning slot (61) is two, the two positioning slots (61) are disposed on opposite sides of the central axis of the first sleeve (62), the at least one positioning table (603) is two, the two positioning tables (603) are disposed on opposite sides of the central axis of the first sleeve (62), and each positioning table (603) is matched with each corresponding positioning slot (61).

10. The pump of claim 1, wherein the pump comprises:

the heating assembly (4) is fixedly connected with the pump shell (1), the heating assembly (4) comprises a heat conducting disc (41) and a heating element (42), the heat conducting disc (41) is fixed on the peripheral wall of the pump shell (1), and the heating element (42) is fixed on the outer end face of the heat conducting disc (41); the heating assembly (4) further comprises a temperature controller (43), a fuse (44) and a heat conducting rod (45) which are arranged on the outer end face of the heat conducting disc (41), the temperature controller (43) and the fuse (44) are electrically connected with the heating element (42) through the heat conducting rod (45), the water inlet is arranged at the central axis of one end of the pump shell (1), and the water outlet and the heating assembly (4) are arranged on two opposite sides of the peripheral wall of the pump shell (1);

A motor (5), at least part of the motor (5) is arranged in a first inner cavity (620) of the first sleeve body (62) and is used for driving water to flow into the pump cavity (11) from the water inlet (12) through the bushing (6) and to be discharged through the water outlet (13);

the impeller (2) is at least partially accommodated in the first inner cavity (620) of the first sleeve body (62) and is connected with the motor (5);

the bearing support (3), the bearing support (3) is located between impeller (2) and motor (5), bearing support (3) with the bottom surface of the first cover body (62) of bush (6) laminating mutually.