CN211835565U

CN211835565U - Pump body

Info

Publication number: CN211835565U
Application number: CN201922483516.7U
Authority: CN
Inventors: 余顺周; 黄�俊; 罗次华
Original assignee: Shenzhen Core Medical Technology Co Ltd
Current assignee: Shenzhen Core Medical Technology Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-11-03
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a pump body, including casing, impeller and first hydraulic bearing, the impeller can be acceptd in the casing with rotating, the impeller includes first board, second board and a plurality of blade, first board and second board interval and relative setting, a plurality of blade setting are between first board and second board, every blade all with first board and second board rigid coupling, form the runner between two adjacent blades, first hydraulic bearing sets up inside the casing, first hydraulic bearing sets up a week along the week of first board; therefore, the first hydrodynamic bearing can apply radial thrust to the first plate part of the impeller, so that the radial rigidity of the impeller is improved, the radial force of blood on the impeller is reduced, and the working stability of the impeller is improved.

Description

Pump body

Technical Field

The utility model relates to the field of medical equipment, in particular to pump body.

Background

In the existing ventricular assist device, the pump body can realize artificial blood pumping through the operation of the impeller, but in the operation process of the impeller, the radial offset generated by the impeller is large because the blood in the pump body can generate radial acting force on the impeller, so that the accurate operation of the impeller is influenced, and great potential risks are brought to the use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pump body to solve the too big problem of impeller radial offset.

In order to solve the technical problem, the utility model provides a pump body, including casing, impeller and first hydrodynamic bearing, the impeller can rotationally accept in the casing, the impeller includes first board, second board and a plurality of leaf, first board with second board interval and relative setting are a plurality of the leaf sets up first board with between the second board, every the leaf all with first board with second board rigid coupling, adjacent two form the runner between the leaf, first hydrodynamic bearing sets up inside the casing, first hydrodynamic bearing follows the week side of first board sets up a week.

In one embodiment, the first hydrodynamic bearing is provided on a side surface of the first plate portion or on an inner wall of the housing.

In one embodiment, the casing has a receiving groove, a first protrusion is provided on a side wall of the receiving groove, the first protrusion is in a circular ring shape, the first protrusion has a first annular surface, the impeller is rotatably received in the receiving groove, the first plate is at least partially received in the first protrusion, a side surface of the first plate is opposite to and spaced from the first annular surface, and the first hydrodynamic bearing is provided on the side surface of the first plate or on the first annular surface.

In one embodiment, a surface of the second plate portion facing away from the first plate portion is a plane, and in an axial direction of the impeller, a surface of the first plate portion close to the second plate portion is closer to a plane where a surface of the second plate portion facing away from the first plate portion is located than the first protrusion portion, so as to avoid the first protrusion portion from being opposite to the flow channel.

In one embodiment, the pump body further includes a second hydrodynamic bearing disposed inside the housing, the second hydrodynamic bearing being disposed for one revolution along a peripheral side of the second plate portion.

In one embodiment, the second hydrodynamic bearing is provided on a side surface of the second plate portion or on an inner wall of the housing.

In one embodiment, the housing has an accommodating groove, a first protruding portion and a second protruding portion are arranged on a side wall of the accommodating groove at intervals, the first protruding portion and the second protruding portion are both annular, the first protruding portion has a first annular surface, the second protruding portion has a second annular surface, and the impeller is rotatably accommodated in the accommodating groove; the first plate portion is at least partially received in the first boss portion, a side surface of the first plate portion is spaced apart from and opposed to the first annular surface, and the first hydrodynamic bearing is disposed on the side surface of the first plate portion or on the first annular surface; the second plate portion is at least partially received in the second protrusion, a side surface of the second plate portion is spaced apart from and opposed to the second annular surface, and the second hydrodynamic bearing is disposed on the side surface of the second plate portion or on the second annular surface.

In one embodiment, a surface of the second plate portion facing away from the first plate portion is a plane, and in an axial direction of the impeller, a surface of the first plate portion close to the second plate portion is closer to a plane where a surface of the second plate portion facing away from the first plate portion is located than the first protrusion portion, so as to avoid the first protrusion portion from being opposite to the flow channel; the surface of the first plate part, which is far away from the second plate part, is a plane, and in the axial direction of the impeller, the surface of the second plate part, which is close to the first plate part, is closer to the plane, on which the surface of the first plate part, which is far away from the first plate part, is located than the second protruding part, so that the second protruding part is prevented from being opposite to the flow channel.

In one embodiment, the pump body further comprises an adjustment magnet assembly, an electromagnetic mechanism, a third hydrodynamic bearing and a fourth hydrodynamic bearing; a first magnetic group is arranged in the first plate part, and a second magnetic group is arranged in the second plate part; the third hydrodynamic bearing is located within the housing between an inner wall of the housing and a surface of the first plate portion facing away from the second plate portion; the adjusting magnetic group is arranged close to the first magnetic group; the fourth hydrodynamic bearing is located within the housing between an inner wall of the housing and a surface of the second plate portion facing away from the first plate portion; the electromagnetic mechanism is arranged close to the second magnetic group and can drive the impeller to rotate through the second magnetic group, and the adjusting magnetic group, the electromagnetic mechanism, the first magnetic group, the second magnetic group, the third hydrodynamic bearing and the fourth hydrodynamic bearing can be matched together to enable the impeller to be suspended in the shell in the axial direction.

In one embodiment, the third hydrodynamic bearing is provided on an inner wall of the housing or on a surface of the first plate portion facing away from the second plate portion; the fourth hydrodynamic bearing is arranged on the inner wall of the shell or on the surface of the second plate part, which is far away from the first plate part;

and/or an inlet pipe communicated with the shell is arranged on the shell, the inlet pipe is close to the surface of the first plate part, which is far away from the second plate part, and the adjusting magnetic group is arranged inside the pipe wall of one end, close to the shell, of the inlet pipe.

The utility model has the advantages as follows:

because the first hydrodynamic bearing is arranged in the shell and is arranged in a circle along the peripheral side of the first plate part, the first hydrodynamic bearing can apply radial thrust to the first plate part of the impeller, so that the radial rigidity of the impeller is improved, the radial force of blood on the impeller is reduced, and the working stability of the impeller is improved.

Drawings

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

Fig. 1 is a schematic structural view of a first embodiment of the pump body of the present invention;

fig. 2 is a schematic view of the impeller of fig. 1:

fig. 3 is a schematic view of the impeller of fig. 1:

fig. 4 is a schematic view of the impeller structure of fig. 1:

FIG. 5 is a schematic structural view of a second embodiment of the pump body of the present invention;

fig. 6 is a schematic structural view of a third embodiment of the pump body of the present invention;

FIG. 7 is an enlarged schematic view of portion A of FIG. 6;

fig. 8 is a schematic structural view of a fourth embodiment of the pump body according to the present invention;

FIG. 9 is an enlarged schematic view of portion B of FIG. 8;

fig. 10 is a schematic structural view of a fifth embodiment of the pump body of the present invention;

FIG. 11 is an enlarged schematic view of portion C of FIG. 10;

fig. 12 is a schematic structural view of a sixth embodiment of the pump body of the present invention;

fig. 13 is a schematic structural view of a seventh embodiment of the pump body of the present invention;

fig. 14 is a schematic structural view of an eighth embodiment of the pump body of the present invention;

FIG. 15 is an enlarged schematic view of portion D of FIG. 14;

FIG. 16 is an enlarged schematic view of section E of FIG. 14;

fig. 17 is a schematic structural view of a ninth embodiment of the pump body of the present invention;

fig. 18 is an enlarged schematic view of portion F of fig. 17;

FIG. 19 is an enlarged schematic view of portion G of FIG. 17;

fig. 20 is a schematic structural view of a tenth embodiment of the pump body of the present invention;

FIG. 21 is an enlarged schematic view of portion H of FIG. 20;

FIG. 22 is an enlarged schematic view of section I of FIG. 20;

fig. 23 is a schematic structural view of an eleventh embodiment of the pump body of the present invention;

FIG. 24 is an enlarged schematic view of portion J of FIG. 23;

FIG. 25 is an enlarged schematic view of portion K of FIG. 23;

fig. 26 is a schematic structural view of a twelfth embodiment of the pump body of the present invention;

FIG. 27 is an enlarged schematic view of portion L of FIG. 26;

fig. 28 is a schematic structural view of a thirteenth embodiment of the pump body of the present invention;

fig. 29 is a schematic structural view of a fourteenth embodiment of the pump body according to the present invention;

fig. 30 is a schematic structural view of a fifteenth embodiment of the pump body of the present invention;

fig. 31 is a schematic structural view of a sixteenth embodiment of the pump body according to the present invention;

fig. 32 is a schematic structural view of a seventeenth embodiment of the pump body according to the present invention.

The reference numbers are as follows:

10. a housing; 11. a containing groove;

20. an impeller; 21. a first plate portion; 211. a first magnetic group; 22. a second plate portion; 221. a second magnetic group; 23. a leaf portion; 24. a flow channel;

31. a first hydrodynamic bearing; 32. a second hydrodynamic bearing; 33. a third hydrodynamic bearing; 34. a fourth hydrodynamic bearing;

41. a first convex portion; 411. a first annular surface; 42. a second convex portion; 421. a second annular surface;

50. adjusting the magnetic group;

60. an electromagnetic mechanism;

70. an inlet pipe.

Detailed Description

The technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

A first embodiment of the pump body is shown in fig. 1 to 4, and includes a housing 10, an impeller 20, and a first hydrodynamic bearing 31, the impeller 20 is rotatably accommodated in the housing 10, the impeller 20 includes a first plate portion 21, a second plate portion 22, and a plurality of vane portions 23, the first plate portion 21 and the second plate portion 22 are disposed at an interval and are opposed to each other, the plurality of vane portions 23 are disposed between the first plate portion 21 and the second plate portion 22, each vane portion 23 is fixedly connected to the first plate portion 21 and the second plate portion 22, a flow passage 24 is formed between two adjacent vane portions 23, the first hydrodynamic bearing 31 is disposed in the housing 10, and the first hydrodynamic bearing 31 is disposed circumferentially around the first plate portion 21.

Specifically, the first hydrodynamic bearing 31 of this embodiment is disposed on the inner wall of the housing 10, and when the left side of the impeller 20 is close to the first hydrodynamic bearing 31, the first hydrodynamic bearing 31 applies a rightward thrust to the first plate portion 21 to move the impeller 20 to the right, and when the right side of the impeller 20 is close to the first hydrodynamic bearing 31, the first hydrodynamic bearing 31 applies a leftward thrust to the first plate portion 21 to move the impeller 20 to the left, that is, the first hydrodynamic bearing 31 can apply a radial thrust to the first plate portion 21, so that the radial automatic resetting of the impeller 20 is realized, the radial stiffness of the impeller 20 is improved, the radial force of blood on the impeller 20 is reduced, and the operational stability of the impeller 20 is ensured.

It is to be noted that the plurality of vanes 23 are provided between the first plate portion 21 and the second plate portion 22 for the purpose of forming the flow channel 24, but the shape of the flow channel 24 is not particularly limited, and as shown in fig. 2 to 4, the flow channel 24 may be divided into a straight shape, an eccentric shape, a twisted shape, and the like by the vanes 23.

A second embodiment of the pump body is shown in fig. 5, which is substantially identical to the pump body shown in fig. 1, except that the first hydrodynamic bearing 31 is provided on the side surface of the first plate portion 21, and if the left side of the first plate portion 21 is close to the housing 10, the first hydrodynamic bearing 31 applies a thrust force to the left side of the housing 10, and a reaction force generated by the housing 10 can push the impeller 20 to move to the right, and if the right side of the first plate portion 21 is close to the housing 10, the first hydrodynamic bearing 31 applies a thrust force to the right side of the housing 10, and a reaction force generated by the housing 10 can push the impeller 20 to move to the left.

As is clear from the first and second embodiments of the pump body, the automatic radial return of the impeller 20 can be achieved even when the first hydrodynamic bearing 31 is provided on the side surface of the first plate portion 21 or on the inner wall of the housing 10, so that the manner of providing the first hydrodynamic bearing 31 is not exclusive and can be selected by a technician according to the use requirements.

A third embodiment of the pump body is shown in fig. 6 and 7, and is substantially identical to the pump body shown in fig. 5, except that the housing 10 has an accommodating groove 11, a first protruding portion 41 is provided on a side wall of the accommodating groove 11, the first protruding portion 41 has an annular shape, the first protruding portion 41 has a first annular surface 411, the impeller 20 is rotatably accommodated in the accommodating groove 11, the first plate portion 21 is at least partially accommodated in the first protruding portion 41, a side surface of the first plate portion 21 is opposed to and spaced from the first annular surface 411, and the first hydrodynamic bearing 31 is provided on the first annular surface 411.

In application, when the left side of the impeller 20 approaches the first protrusion 41, the first hydrodynamic bearing 31 applies a rightward thrust to the first plate 21 to move the impeller 20 rightward, and when the right side of the impeller 20 approaches the first protrusion 41, the first hydrodynamic bearing 31 applies a leftward thrust to the first plate 21 to move the impeller 20 leftward, thereby automatically returning the impeller 20.

And the inner space of the pump body arranged on the peripheral side of the impeller 20 is reduced, so that the radial offset of the impeller 20 can be reduced, the amount of contained blood can be reduced, the influence of the blood on the operation of the impeller 20 is reduced, and a more stable working environment is provided for the impeller 20.

A fourth embodiment of the pump body is shown in fig. 8 and 9, and is substantially identical to the structure of the pump body shown in fig. 6, except that the first hydrodynamic bearing 31 is provided on the side surface of the first plate portion 21, and when the left side of the first plate portion 21 is close to the first projection 41, the first hydrodynamic bearing 31 applies a thrust to the left side of the first projection 41, and a reaction force generated by the first projection 41 pushes the impeller 20 to the right, and when the right side of the first plate portion 21 is close to the first projection 41, the first hydrodynamic bearing 31 applies a thrust to the right side of the first projection 41, and a reaction force generated by the first projection 41 pushes the impeller 20 to the left.

As can be seen from the third and fourth embodiments of the pump body, the automatic radial return of the impeller 20 can be achieved even if the first hydrodynamic bearing 31 is provided on the side surface of the first plate portion 21 or on the first annular surface 411, so that the manner of providing the first hydrodynamic bearing 31 is not exclusive and can be selected by a technician according to the use requirements.

A fifth embodiment of the pump body is shown in fig. 10 and 11, which is substantially identical to the structure of the pump body shown in fig. 6, except that the surface of the second plate portion 22 facing away from the first plate portion 21 is a flat surface, and in the axial direction of the impeller 20, the surface of the first plate portion 21 closer to the second plate portion 22 is closer to the flat surface of the second plate portion 22 facing away from the first plate portion 21 than the first projection 41 is, so as to avoid the first projection 41 from opposing the flow passage 24.

At this time, since the flow channel 24 is completely disposed outside the first protrusion 41, when the blood flows out of the flow channel 24 from the inside of the impeller 20, the first protrusion 41 will not block the flow of the blood, so that the smoothness of the flow of the blood is improved, and the smoothness of the operation of the impeller 20 is improved.

A sixth embodiment of the pump body is shown in fig. 12, which substantially corresponds to the structure of the pump body shown in fig. 1, except that the pump body further includes a second hydraulic bearing 32, the second hydraulic bearing 32 being disposed inside the housing 10, the second hydraulic bearing 32 being disposed along the circumferential side of the second plate portion 22 by one turn, specifically, the second hydraulic bearing 32 being disposed on the inner wall of the housing 10.

In application, when the left side of the first plate portion 21 approaches the first hydrodynamic bearing 31, the first hydrodynamic bearing 31 applies a rightward thrust to the first plate portion 21 to move the first plate portion 21 rightward, and when the right side of the first plate portion 21 approaches the first hydrodynamic bearing 31, the first hydrodynamic bearing 31 applies a leftward thrust to the first plate portion 21 to move the first plate portion 21 leftward.

Similarly, if the left side of the second plate 22 is close to the second hydraulic bearing 32, the second hydraulic bearing 32 applies a rightward thrust to the second plate 22, so that the second plate 22 moves rightward, and if the right side of the second plate 22 is close to the second hydraulic bearing 32, the second hydraulic bearing 32 applies a leftward thrust to the second plate 22, so that the second plate 22 moves leftward.

That is, when the impeller 20 is close to the left side of the casing 10, the first hydrodynamic bearing 31 and the second hydrodynamic bearing 32 can simultaneously apply a rightward radial thrust to the impeller 20, and when the impeller 20 is close to the right side of the casing 10, the first hydrodynamic bearing 31 and the second hydrodynamic bearing 32 can simultaneously apply a leftward radial thrust to the impeller 20, so that the up-and-down force application stability of the impeller 20 is ensured, and the radial stiffness of the impeller 20 is further improved.

A seventh embodiment of the pump body is shown in fig. 13, which is substantially identical to the pump body shown in fig. 12, except that the second hydraulic bearing 32 is disposed on the side surface of the second plate portion 22, and if the left side of the second plate portion 22 is close to the housing 10, the second hydraulic bearing 32 applies a pushing force to the left side of the housing 10, and a reaction force generated by the housing 10 can push the second plate portion 22 to move to the right, and if the right side of the second plate portion 22 is close to the housing 10, the second hydraulic bearing 32 applies a pushing force to the right side of the housing 10, and a reaction force generated by the housing 10 can push the second plate portion 22 to move to the left.

As can be seen from the sixth and seventh embodiments of the pump body, the radial automatic return of the impeller 20 can be achieved even if the second hydrodynamic bearing 32 is provided on the side surface of the second plate portion 22 or on the inner wall of the housing 10, so the second hydrodynamic bearing 32 is not provided exclusively, and a technician can select it according to the use requirement.

An eighth embodiment of the pump body is shown in fig. 14 to 16, and is substantially identical to the structure of the pump body shown in fig. 13, except that the housing 10 has an accommodating groove 11, a first protrusion 41 and a second protrusion 42 are provided on a side wall of the accommodating groove 11 at intervals, the first protrusion 41 and the second protrusion 42 are both annular, the first protrusion 41 has a first annular surface 411, the second protrusion 42 has a second annular surface 421, and the impeller 20 is rotatably accommodated in the accommodating groove 11; the first plate portion 21 is at least partially housed in the first protrusion 41, the side surface of the first plate portion 21 is opposed to and spaced apart from the first annular surface 411, and the first hydrodynamic bearing 31 is provided on the first annular surface 411; the second plate portion 22 is at least partially housed in the second protrusion 42, a side surface of the second plate portion 22 is opposed to and spaced apart from the second annular surface 421, and the second hydrodynamic bearing 32 is provided on the second annular surface 421.

In application, when the left side of the first plate portion 21 approaches the first protruding portion 41, the first hydrodynamic bearing 31 applies a rightward thrust to the first plate portion 21 to move the first plate portion 21 rightward, and when the right side of the first plate portion 21 approaches the first protruding portion 41, the first hydrodynamic bearing 31 applies a leftward thrust to the first plate portion 21 to move the first plate portion 21 leftward.

Similarly, if the left side of the second plate 22 is close to the second protrusion 42, the second hydraulic bearing 32 applies a rightward thrust to the second plate 22 to move the second plate 22 to the right, and if the right side of the second plate 22 is close to the second protrusion 42, the second hydraulic bearing 32 applies a leftward thrust to the second plate 22 to move the second plate 22 to the left.

When the first protrusion 41 and the second protrusion 42 are provided at the same time, the internal space of the pump body disposed on the peripheral side of the impeller 20 is further reduced, the amount of blood contained in the pump body is reduced again, and the influence of the blood on the operation of the impeller 20 is obviously reduced.

A ninth embodiment of the pump body, shown in fig. 17 to 19, substantially corresponds to the structure of the pump body shown in fig. 14, except that a first hydrodynamic bearing 31 is provided on the side of the first plate portion 21; the second hydraulic bearing 32 is provided on a side surface of the second plate portion 22.

In application, when the left side of the first plate portion 21 approaches the first projection 41, the first hydrodynamic bearing 31 applies a thrust to the left side of the first projection 41, and a reaction force generated by the first projection 41 pushes the first plate portion 21 to move to the right, and when the right side of the first plate portion 21 approaches the first projection 41, the first hydrodynamic bearing 31 applies a thrust to the right side of the first projection 41, and a reaction force generated by the first projection 41 pushes the first plate portion 21 to move to the left.

Similarly, if the left side of the second plate 22 is close to the second protrusion 42, the second hydraulic bearing 32 applies a pushing force to the left side of the second protrusion 42, and the reaction force generated by the second protrusion 42 can push the second plate 22 to move to the right, and if the right side of the second plate 22 is close to the second protrusion 42, the second hydraulic bearing 32 applies a pushing force to the right side of the second protrusion 42, and the reaction force generated by the second protrusion 42 can push the second plate 22 to move to the left.

A tenth embodiment of the pump body, shown in figures 20 to 22, substantially corresponds to the structure of the pump body shown in figure 17, with the difference that the first hydrodynamic bearing 31 is provided on the first annular surface 411; the second hydraulic bearing 32 is provided on a side surface of the second plate portion 22.

An eleventh embodiment of the pump body, shown in fig. 23 to 25, substantially corresponds to the structure of the pump body shown in fig. 17, except that a first hydrodynamic bearing 31 is provided on the side of the first plate portion 21; the second hydraulic bearing 32 is provided on the second annular surface 421.

A twelfth embodiment of the pump body is shown in fig. 26 and 27, which is substantially identical to the structure of the pump body shown in fig. 14, except that the surface of the second plate portion 22 facing away from the first plate portion 21 is a flat surface, and in the axial direction of the impeller 20, the surface of the first plate portion 21 closer to the second plate portion 22 is closer to the flat surface of the second plate portion 22 facing away from the first plate portion 21 than the first projection 41 is to avoid the first projection 41 from opposing the flow passage 24; the surface of the first plate portion 21 facing away from the second plate portion 22 is a flat surface, and in the axial direction of the impeller 20, the surface of the second plate portion 22 close to the first plate portion 21 is closer to the flat surface of the first plate portion 21 facing away from the first plate portion 21 than the second protrusion 42, so as to avoid the second protrusion 42 facing the flow channel 24.

At this time, since the flow channel 24 is completely disposed outside the first protrusion 41 and the second protrusion 42, when the blood flows out of the flow channel 24 from the inside of the impeller 20, the first protrusion 41 and the second protrusion 42 will not block the flow of the blood, so that the smoothness of the flow of the blood is improved, and the smoothness of the operation of the impeller 20 is improved.

A thirteenth embodiment of the pump body is shown in fig. 28, which substantially corresponds to the structure of the pump body shown in fig. 26, with the difference that it further comprises a regulation magnet group 50, an electromagnetic mechanism 60, a third hydrodynamic bearing 33 and a fourth hydrodynamic bearing 34; a first magnetic group 211 is arranged in the first plate part 21, and a second magnetic group 221 is arranged in the second plate part 22; a third hydrodynamic bearing 33 is located inside the housing 10 between the inner wall of the housing 10 and the surface of the first plate 21 facing away from the second plate 22; the adjustment magnet pack 50 is disposed adjacent to the first magnet pack 211; a fourth hydrodynamic bearing 34 is located within the housing 10 between the inner wall of the housing 10 and the surface of the second plate 22 facing away from the first plate 21; the electromagnetic mechanism 60 is disposed near the second magnetic assembly 221, the electromagnetic mechanism 60 can drive the impeller 20 to rotate through the second magnetic assembly 221, and the adjustment magnetic assembly 50, the electromagnetic mechanism 60, the first magnetic assembly 211, the second magnetic assembly 221, the third hydrodynamic bearing 33 and the fourth hydrodynamic bearing 34 can cooperate together to suspend the impeller 20 in the housing 10 in the axial direction. Specifically, the electromagnetic mechanism 60 is a motor.

Specifically, at this time, the third hydrodynamic bearing 33 is disposed on the inner wall of the housing 10, the fourth hydrodynamic bearing 34 is disposed on the inner wall of the housing 10, and if the impeller 20 moves upward to be close to the third hydrodynamic bearing 33, the third hydrodynamic bearing 33 will apply a downward thrust to the first plate portion 21, so that the impeller 20 moves downward, and if the impeller 20 moves downward to be close to the fourth hydrodynamic bearing 34, the fourth hydrodynamic bearing 34 will apply an upward thrust to the second plate portion 22, so that the impeller 20 moves upward, that is, after the third hydrodynamic bearing 33 and the fourth hydrodynamic bearing 34 are added, the axial direction of the impeller 20 can be automatically reset.

A fourteenth embodiment of the pump body is shown in fig. 29, which corresponds substantially to the structure of the pump body shown in fig. 28, except that a third hydrodynamic bearing 33 is provided on the surface of the first plate portion 21 facing away from the second plate portion 22; a fourth hydrodynamic bearing 34 is provided on the surface of the second plate portion 22 facing away from the first plate portion 21.

If the impeller 20 moves upward to be close to the top surface of the housing 10, the third hydrodynamic bearing 33 will apply an upward thrust to the top surface of the housing 10, the top surface of the housing 10 will generate a reaction force to push the impeller 20 to move downward, and if the impeller 20 moves downward to be close to the bottom surface of the housing 10, the fourth hydrodynamic bearing 34 will apply a downward thrust to the bottom surface of the housing 10, the bottom surface of the housing 10 will generate a reaction force to push the impeller 20 to move upward, thereby achieving the automatic axial resetting of the impeller 20.

A fifteenth embodiment of the pump body is shown in fig. 30, which substantially corresponds to the structure of the pump body shown in fig. 28, except that a third hydrodynamic bearing 33 is provided on the inner wall of the housing 10; a fourth hydrodynamic bearing 34 is provided on the surface of the second plate portion 22 facing away from the first plate portion 21.

When the impeller 20 moves upward to approach the third hydrodynamic bearing 33, the third hydrodynamic bearing 33 applies a downward thrust to the first plate portion 21, so that the impeller 20 moves downward, and when the impeller 20 moves downward to approach the bottom surface of the housing 10, the fourth hydrodynamic bearing 34 applies a downward thrust to the bottom surface of the housing 10, so that the bottom surface of the housing 10 generates a reaction force to push the impeller 20 to move upward, thereby achieving the automatic axial resetting of the impeller 20.

A sixteenth embodiment of the pump body is shown in fig. 31, which substantially corresponds to the structure of the pump body shown in fig. 28, except that a third hydrodynamic bearing 33 is provided on the surface of the first plate portion 21 facing away from the second plate portion; a fourth hydrodynamic bearing 34 is provided on the inner wall of the housing 10.

If the impeller 20 moves upward to be close to the top surface of the housing 10, the third hydrodynamic bearing 33 will apply an upward thrust to the top surface of the housing 10, the top surface of the housing 10 will generate a reaction force to push the impeller 20 to move downward, and if the impeller 20 moves downward to be close to the fourth hydrodynamic bearing 34, the fourth hydrodynamic bearing 34 will apply an upward thrust to the second plate portion 22, so that the impeller 20 moves upward, and the axial automatic resetting of the impeller 20 is realized.

A seventeenth embodiment of the pump body is shown in fig. 32, which is substantially identical to the structure of the pump body shown in fig. 28, except that an inlet pipe 70 communicated with the housing 10 is arranged on the housing 10, the inlet pipe 70 is close to the surface of the first plate portion 21 facing away from the second plate portion 22, and the adjusting magnet group 50 is arranged inside the pipe wall of the inlet pipe 70 close to one end of the housing 10, so as to avoid the adjusting magnet group 50 occupying the inner space of the pump body, and improve the structural compactness of the pump body.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. The utility model provides a pump body, its characterized in that includes casing, impeller and first hydrodynamic bearing, the impeller can rotationally accept in the casing, the impeller includes first board, second board and a plurality of blade, first board with second board interval and relative setting are a plurality of the blade sets up first board with between the second board, every the blade all with first board with second board rigid coupling, adjacent two form the runner between the blade, first hydrodynamic bearing sets up inside the casing, first hydrodynamic bearing follows the week side of first board sets up a week.

2. The pump body according to claim 1, wherein the first hydrodynamic bearing is provided on a side face of the first plate portion or on an inner wall of the housing.

3. The pump body according to claim 1, wherein the housing has a receiving groove, a first protrusion is provided on a side wall of the receiving groove, the first protrusion is annular, the first protrusion has a first annular surface, the impeller is rotatably received in the receiving groove, the first plate is at least partially received in the first protrusion, a side surface of the first plate is opposite to and spaced apart from the first annular surface, and the first hydrodynamic bearing is provided on the side surface of the first plate or on the first annular surface.

4. The pump body according to claim 3, wherein a surface of the second plate portion facing away from the first plate portion is a flat surface, and a surface of the first plate portion that is close to the second plate portion is closer to a flat surface of the second plate portion facing away from the first plate portion than the first projection portion in an axial direction of the impeller, so as to avoid the first projection portion from opposing the flow passage.

5. The pump body of claim 1, further comprising a second hydrodynamic bearing disposed within the housing, the second hydrodynamic bearing disposed one revolution along a peripheral side of the second plate portion.

6. The pump body according to claim 5, characterized in that said second hydrodynamic bearing is provided on the side of said second plate portion or on the inner wall of said housing.

7. The pump body according to claim 5, wherein the housing has an accommodating groove, a sidewall of the accommodating groove is provided with a first protrusion and a second protrusion at intervals, the first protrusion and the second protrusion are both annular, the first protrusion has a first annular surface, the second protrusion has a second annular surface, and the impeller is rotatably accommodated in the accommodating groove;

the first plate portion is at least partially received in the first boss portion, a side surface of the first plate portion is spaced apart from and opposed to the first annular surface, and the first hydrodynamic bearing is disposed on the side surface of the first plate portion or on the first annular surface;

the second plate portion is at least partially received in the second protrusion, a side surface of the second plate portion is spaced apart from and opposed to the second annular surface, and the second hydrodynamic bearing is disposed on the side surface of the second plate portion or on the second annular surface.

8. The pump body according to claim 7, wherein a surface of the second plate portion facing away from the first plate portion is a flat surface, and a surface of the first plate portion that is close to the second plate portion is closer to a plane in which the surface of the second plate portion facing away from the first plate portion than the first projection portion is located in an axial direction of the impeller, so as to avoid the first projection portion from opposing the flow passage;

the surface of the first plate part, which is far away from the second plate part, is a plane, and in the axial direction of the impeller, the surface of the second plate part, which is close to the first plate part, is closer to the plane, on which the surface of the first plate part, which is far away from the first plate part, is located than the second protruding part, so that the second protruding part is prevented from being opposite to the flow channel.

9. The pump body according to claim 5,

the pump body further comprises an adjusting magnetic group, an electromagnetic mechanism, a third hydraulic bearing and a fourth hydraulic bearing;

a first magnetic group is arranged in the first plate part, and a second magnetic group is arranged in the second plate part;

the third hydrodynamic bearing is located within the housing between an inner wall of the housing and a surface of the first plate portion facing away from the second plate portion;

the adjusting magnetic group is arranged close to the first magnetic group;

the fourth hydrodynamic bearing is located within the housing between an inner wall of the housing and a surface of the second plate portion facing away from the first plate portion;

the electromagnetic mechanism is arranged close to the second magnetic group and can drive the impeller to rotate through the second magnetic group, and the adjusting magnetic group, the electromagnetic mechanism, the first magnetic group, the second magnetic group, the third hydrodynamic bearing and the fourth hydrodynamic bearing can be matched together to enable the impeller to be suspended in the shell in the axial direction.

10. The pump body according to claim 9,

the third hydrodynamic bearing is arranged on the inner wall of the shell or on the surface of the first plate part, which is far away from the second plate part; the fourth hydrodynamic bearing is arranged on the inner wall of the shell or on the surface of the second plate part, which is far away from the first plate part;