Housing assembly, method of manufacturing thereof and blood pump

Abstract

The embodiment of the present application provides a shell assembly, a manufacturing method thereof and a blood pump, the shell assembly comprising: a main shell provided with a connecting portion for connecting an inlet and outlet sleeve, an accommodation cavity, an inlet passage and an outlet passage communicated with the accommodation cavity, the inlet passage and the outlet passage penetrating through the connecting portion; and an adapter provided with a sleeve connection hole, the sleeve connection hole and the connecting portion being connected and sealed, and an end of the adapter opposite to the main shell being capable of connecting the inlet and outlet sleeve. The technical scheme of the present application can realize the assembly convenience of the shell assembly and facilitate the connection of the shell assembly with other structures.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a shell assembly, a manufacturing method thereof and a blood pump. BACKGROUND

[0002] As a kind of ventricular assist device, blood pump is the main instrument for treating cardiovascular diseases such as cardiogenic shock and heart failure. The blood pump controls the energization of the coil through the motor, so that the motor generates a rotating electromagnetic field, so that the electromagnetic field drives the impeller to rotate, so that the blood flows into the liquid inlet of the blood pump and flows out from the liquid outlet after the impeller, so as to realize the circulation of blood.

[0003] Whether the sealing between each part of the blood pump directly affects the performance of the blood pump, for example, affects the flow of blood. However, there is a problem of difficult assembly between the pump shell and the inlet and outlet sleeve of the blood pump at present. SUMMARY

[0004] In view of the above problems, the present application is proposed to provide a shell assembly, a manufacturing method thereof and a blood pump.

[0005] The present application provides a shell assembly, comprising:

[0006] A main shell is provided with a connecting portion for connecting an inlet and outlet sleeve, the inside of the main shell is provided with a receiving cavity, an inlet passage and an outlet passage which are in communication with the receiving cavity, the inlet passage has an inlet port penetrating through the connecting portion, and the outlet passage has an outlet port penetrating through the connecting portion; and

[0007] An adapter is provided with a sleeve hole, the sleeve hole and the connecting portion are connected and sealed, and one end of the adapter away from the main shell can be connected with the inlet and outlet sleeve.

[0008] Optionally, the connecting portion is provided with a limiting groove, the adapter is provided with a limiting protrusion, and the limiting protrusion is matched and engaged with the limiting groove.

[0009] Optionally, the connecting portion includes a first protruding structure for forming the outlet port and a second protruding structure for forming the inlet port, and the limiting groove is arranged between the first protruding structure and the second protruding structure.

[0010] Optionally, the main shell includes a pump shell provided with the receiving cavity and a top cover connected with the pump shell and provided with the inlet passage, the pump shell is provided with a communication inlet, and one end of the inlet passage away from the inlet port is in communication with the communication inlet.

[0011] The connecting part comprises a first protruding structure for forming the liquid outlet and a second protruding structure for forming the liquid inlet, the first protruding structure is arranged on the pump shell, and the second protruding structure is at least partially arranged on the top cover.

[0012] Optionally, the connecting part is arranged on one side of the main shell, and the first protruding structure and the second protruding structure are arranged along the axial direction of the main shell.

[0013] Optionally, the second protruding structure comprises a first protrusion connected with the first protruding structure, and a second protrusion arranged on the top cover, the first protrusion is provided with a first gap, the second protrusion is provided with a second gap, and the first gap and the second gap are connected to form the liquid inlet.

[0014] Optionally, the top cover comprises a first shell and a second shell, and the first shell and the second shell jointly form the liquid inlet channel.

[0015] The liquid inlet channel further penetrates the first shell at one end away from the liquid inlet, and a connecting port is formed on the first shell, which corresponds to the communicating inlet on the top of the pump shell.

[0016] Optionally, the first shell is provided with an inner convex ring, which surrounds the hole rim of the connecting port, and the inner convex ring is in sealing connection with the hole rim of the communicating inlet.

[0017] Optionally, the top of the pump shell is further provided with a third protrusion, which surrounds the communicating inlet and is connected with the first protrusion to form a closed annular structure, which extends along the entire outer edge of the first shell of the top cover and is in sealing connection with the outer edge of the first shell.

[0018] Optionally, the protruding height of the third protrusion on the pump shell is less than the protruding height of the first protrusion on the pump shell, and the first shell can abut against the side surface of the first protrusion.

[0019] Optionally, the liquid inlet channel is in a bent shape and has a bending position, and the bending position is arranged near the connecting port of the liquid inlet channel.

[0020] From the direction of the liquid inlet to the connecting port, the cross-sectional area of the liquid inlet channel first gradually decreases and then gradually increases, and the minimum cross-sectional area of the liquid inlet channel is located at the bending position.

[0021] Optionally, the second shell of the main shell has a highest point at the bending position, the height of the liquid inlet channel at the highest point is greater than the height of the liquid inlet channel at any other position, and the direction of the height is parallel to the axial direction of the main shell.

[0022] The application provides a blood pump, which comprises a shell assembly, a rotor assembly and a bearing assembly.

[0023] The shell assembly comprises a first shell, a second shell and a connecting part.

[0024] The rotor assembly comprises a rotor and a bearing assembly.

[0025] The connecting part comprises an adapter and an inlet-outlet sleeve.

[0026] The application further provides a manufacturing method of the shell assembly.

[0027] The inner convex ring of the first shell is sealingly connected to the top of the pump shell.

[0028] The outer edge of the first shell is sealingly connected to the first and third protrusions on the pump shell.

[0029] The outer edge of the second shell is sealingly connected to the first shell and the first protrusion, respectively.

[0030] The hole wall of the adapter sleeve hole is sealingly connected to the outer side surface of the connecting part.

[0031] The end surface of one end of the inlet-outlet sleeve is sealingly connected to the side of the adapter away from the pump shell, and the contact position between the adapter and the inlet-outlet sleeve is sealingly connected from the outside.

[0032] When other components need to be assembled on the main shell, for example, the inlet-outlet sleeve needs to be assembled, the main shell itself will block the assembly operation, on the one hand, the assembly operation is inconvenient, and on the other hand, a blind area will be caused, and some positions cannot be sealed. In the technical scheme, the main shell is provided with the connecting part, the connecting part of the main shell is provided with the adapter, the connecting position between the adapter and the connecting part avoids the main shell and is not blocked by the main shell, so that the adapter and the connecting part can be fixed from the side where the connecting part is located, the main shell is completely avoided, and other components are not blocked, so that the adapter and the main shell can be assembled through the connecting part, the inlet-outlet sleeve is conveniently installed on the adapter, and the connection between the related components is realized. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

[0034] Figure 1a A structural schematic diagram of a blood pump in an embodiment of the present application;

[0035] Figure 1b A partial structural schematic diagram of the housing assembly in FIG. 1;

[0036] Figure 2 A structural schematic diagram of the housing assembly in FIG. 1;

[0037] Figure 3 A partial structural schematic diagram of the housing assembly in FIG. 1;

[0038] Figure 4 An exploded schematic diagram of the housing assembly in FIG. 1;

[0039] Figure 5 A structural schematic diagram of the pump housing in FIG. 1;

[0040] Figure 6 A structural schematic diagram of the adapter in FIG. 1;

[0041] Figure 7 A structural schematic diagram of the first housing in FIG. 1;

[0042] Figure 8 A cutaway schematic diagram of the blood pump in FIG. 1;

[0043] Figure 9 A Figure 8 An enlarged view of A in FIG. 1;

[0044] Figure 10 A plan schematic diagram of the blood pump in FIG. 1;

[0045] Figure 11 Another cutaway schematic diagram of the blood pump in FIG. 1.

[0046] Reference signs:

[0047]

[0048] DETAILED DESCRIPTION

[0049] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0050] It should be noted that in the description of the present application, if the terms "first", "second" and the like appear, "first", "second" are only used for the convenience of describing different components or names, and cannot be understood as indicating or implying the order relationship, relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" appears throughout the text, it means that it includes three parallel solutions. For example, "A and / or B" includes A solution, or B solution, or A and B solutions.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0052] The inlet channel and the outlet channel of the conventional blood pump are mostly perpendicular to each other, for example, the inlet channel is along the axial direction of the pump shell of the blood pump, and the outlet channel is perpendicular to the axial direction. When the blood pump is implanted in the human body, the ventricular wall needs to be drilled for the inlet channel, and the artery also needs to be drilled for the outlet channel. The more the drilling positions, the more difficult the operation, and other problems.

[0053] Please refer to Figure 1a and Figure 2 For this, the technical personnel of the present application set the inlet channel 40 and the outlet channel 15 along the lateral direction of the pump shell 10 after creative work, so that the inlet direction and the outlet direction are the same. Therefore, only one hole needs to be set on the ventricular wall to correspond to the inlet channel 40 and the outlet channel 15. When the blood pump is implanted in the human body, the inlet channel 40 and the outlet channel 15 pass through the same hole on the ventricular wall, and the outlet channel 15 directly passes through the aortic valve or the pulmonary valve, so as to deliver blood from the left ventricle to the aorta, or deliver blood from the right ventricle to the pulmonary artery. In this way, there is no need to drill holes on the aorta or the pulmonary artery, which can reduce the surgical incision and reduce the risk of bleeding.

[0054] In order to facilitate the liquid inlet channel 40 and the liquid outlet channel 15 to pass through the same opening on the ventricular wall at the same time, an inlet and outlet sleeve 60 is further arranged outside the pump shell 10 of the blood pump 100, the inlet and outlet sleeve 60 forms an inflow channel 61 and an outflow channel 62, one end of the inflow channel 61 is connected with the liquid inlet channel 40, and the other end of the inflow channel 61 is located in the left ventricle or the right ventricle; one end of the outflow channel 62 is connected with the liquid outlet channel 15, and the other end of the outflow channel 62 passes through the aortic valve or the pulmonary valve. The arrangement of the inlet and outlet sleeve 60 is equivalent to integrating the liquid inlet channel 40 and the liquid outlet channel 15 into an integral component, and then passing the integral component through the ventricular wall, without considering the shape and size of the ventricular wall opening in terms of the shape of the liquid inlet channel 40 and the liquid outlet channel 15, so that the sealing difficulty between the blood pump 100 and the ventricular wall can be reduced, and the risk of bleeding can be reduced.

[0055] In addition, the outer circumferential surface of the inlet and outlet sleeve 60 is circular and has a smooth outer circumferential surface, the shape of the opening on the ventricular wall after being expanded by the inlet and outlet sleeve 60 is relatively regular, the stress is uniform, and the sealing difficulty is relatively low.

[0056] However, due to the small volume of the blood pump 100 itself and other factors, the sealing operation between the blood pump 100 and the inlet and outlet sleeve 60 is not facilitated after the inlet and outlet sleeve 60 is arranged, so that the sealing between the blood pump 100 and the inlet and outlet sleeve 60 is difficult to guarantee, which can cause blood leakage and seriously affect the use safety of the blood pump 100.

[0057] At the same time, when the inlet and outlet sleeve 60 is assembled with the blood pump 100, the inlet and outlet sleeve 60 is blocked by the pump shell 10, which makes it difficult to assemble the inlet and outlet sleeve 60 with the blood pump 100.

[0058] In order to solve the above problems, the shell assembly 101 is provided in the embodiment of the present application, the adapter 50 is added, and the structure of the shell assembly 101 itself is improved, so that the assembly operation between the inlet and outlet sleeve 60 and the blood pump 100 is facilitated, and the sealing is better realized, and the sealing between the inlet and outlet sleeve 60 and the blood pump 100 is guaranteed.

[0059] Please refer to Figures 1a to 6 The shell assembly 101 provided in the embodiment of the present application comprises a main shell 101a and an adapter 50, the main shell 101a is provided with a connecting portion 101b (such as Figure 1bAs shown, with the dashed frame as the boundary, the left side of the dashed frame is the main housing 101a, and the right side of the dashed frame is the connecting part 101b. The main housing 101a has a receiving cavity 13, a liquid inlet channel 40, and a liquid outlet channel 15. Both the liquid inlet channel 40 and the liquid outlet channel 15 are connected to the receiving cavity 13, and both the liquid inlet channel 40 and the liquid outlet channel 15 pass through the connecting part 101b. The adapter 50 is provided with a sleeve hole 51, which is sleeved and sealed to the connecting part 101b. The end of the adapter 50 facing away from the main housing 101a can be connected to the inlet / outlet sleeve 60.

[0060] In this embodiment, the inlet channel 40 and the outlet channel 15 are both located through the same connecting portion 101b. Thus, by providing an opening on the ventricular wall corresponding to the connecting portion 101b, both the inlet channel 40 and the outlet channel 15 can be simultaneously connected to the ventricular wall. When an inlet / outlet cannula 60 is connected at the locations of the inlet channel 40 and the outlet channel 15, the inlet / outlet cannula 60 can directly pass through the opening on the ventricular wall, enabling communication between the inlet channel 40 and the ventricle, and allowing the outlet channel 15 to pass through the aortic or pulmonary valve. Therefore, only one opening is needed on the ventricular wall corresponding to the connecting portion 101b for the inlet channel 40 and the outlet channel 15, eliminating the need for openings in the aorta or pulmonary artery, thus reducing the number of openings and lowering surgical risks.

[0061] When the main housing 101a is connected to other components, such as the inlet / outlet sleeve 60, the assembly of the inlet / outlet sleeve 60 and the main housing 101a will be obstructed by the main housing 101a, making operation inconvenient and creating blind spots. For example, when the inlet / outlet sleeve 60 and the main housing 101a are sealed by welding, the welding tool can only be used from the side where the main housing 101a is located (e.g., towards...). Figure 2 Operations can be performed by inserting the end of the sleeve 60 into the main housing 101a from the opposite direction of the first direction. However, the main housing 101a can obstruct the view and tools, resulting in situations where welding is impossible or the welding position is misaligned in some areas. In this embodiment, since the main housing 101a is provided with a connecting part 101b, and an adapter 50 is provided outside the connecting part 101b of the main housing 101a, the connection position of the adapter 50 and the connecting part 101b avoids the main housing 101a and is not obstructed by the main housing 101a. Therefore, it can be operated from the side where the connecting part 101b is located (e.g., towards the...). Figure 2 The adapter 50 and the connecting part 101b are assembled in the first direction of the process, completely avoiding the main housing 101a and not being blocked by other parts. This allows the adapter 50 and the main housing 101a to be sealed together through the connecting part 101b, and provides convenience for the subsequent installation of the inlet and outlet sleeve 60 on the adapter 50 to achieve a sealed connection between related parts.

[0062] The connecting part 101b can be a protruding structure or a groove. When the connecting part 101b is a protruding structure provided on the main housing 101a, the socket of the adapter 50 can be fitted onto the outer side of the connecting part 101b.

[0063] There are various ways to seal the connection between the connecting part 101b and the adapter 50, such as welding, bonding, or heat fusion. Taking welding as an example, the wall of the socket 51 on the adapter 50 is welded to the outer surface of the connecting part 101b. During the welding operation, the adapter 50 and the connecting part 101b can be welded together from the outside, facing the inlet channel 40 and the outlet channel 15 (e.g., towards...). Figure 2 The welding position between the adapter 50 and the connecting part 101b (in the first direction) is located on the side of the connecting part 101b away from the main housing 101a. When welding the adapter 50 and the connecting part 101b from this direction, since the welding tool is on the side away from the main housing 101a and is not obstructed by the main housing 101a, the welding operation can be greatly facilitated. This ensures that the welding position can be along the entire circumference of the socket 51, so that the entire circumference of the outer side of the connecting part 101b is sealed and welded to the entire circumference of the socket 51 of the adapter 50, preventing blood from seeping between the outer side of the connecting part 101b and the socket 51 of the adapter 50. The welding position mentioned in this embodiment is the fourth welding position S4 mentioned in the later embodiments. To help understand the welding position and to express it more intuitively, the first, second, third, fourth and fifth welding positions in the accompanying drawings of this application are all marked with thick lines.

[0064] The embodiments of this application will be described in further detail below with reference to specific implementation methods.

[0065] Please refer to the reference. Figure 8 An impeller (not shown) is provided within the receiving cavity 13 of the main housing 101a. The impeller can rotate relative to the main housing 101a about a rotation axis. The inlet channel 40 has an inlet port 41 penetrating the connecting portion 101b, and the outlet channel 15 has an outlet port 151 penetrating the connecting portion 101b. Optionally, the opening direction of the inlet port 41 and the opening direction of the outlet port 151 are parallel to the tangential direction of the impeller. Furthermore, the main housing 101a optionally includes a side wall 11 arranged around the rotation axis. The side wall 11 has an arc-shaped outer peripheral surface, and the opening directions of the inlet port 41 and the outlet port 151 are along the tangential direction of the arc-shaped outer peripheral surface. When the impeller rotates, it can provide power to draw blood from the inlet channel 40 into the receiving cavity 13, and then allow the blood to flow out from the outlet channel 15 along the tangential direction of the arc-shaped outer peripheral surface of the main housing 101a. The blood flow is smooth, and the power loss is small.

[0066] In the embodiments of the present application, the main housing 101a is formed by combining a plurality of housing components, and the inlet channel 40 can be formed on one housing or formed by combining a plurality of housings. Similarly, the outlet channel 15 can be formed on one housing or formed by combining a plurality of housings.

[0067] Please refer to FIGS. 1 to Figure 5 In some embodiments, the main housing 101a includes a pump housing 10 and a top cover 70. The pump housing 10 is provided with a receiving cavity 13, and the top cover 70 is provided with an inlet channel 40. The top cover 70 is located at the top of the pump housing 10. Specifically, the pump housing 10 can be generally in the shape of a volute. The pump housing 10 includes a side wall 11 and a top wall 12. The side wall 11 is arranged around the edge of the top wall 12 and cooperates with the top wall 12 to form the receiving cavity 13. The side wall 11 is generally in the shape of a circular arc. The outlet channel 15 penetrates the side wall 11, so the outlet channel 15 is arranged in a lateral direction. The top wall 12 of the pump housing 10 is perpendicular to the rotation axis of the impeller. Further, the top wall 12 of the pump housing 10 is provided with a communication inlet 18. The communication inlet 18 is in communication with the inlet channel 40. Blood flows from the inlet channel 40 in the tangential direction of the side wall 11 and then enters the receiving cavity 13 in the direction of the rotation axis from the communication inlet 18.

[0068] In some embodiments, the top cover 70 includes a first housing 20 and a second housing 30 arranged separately. Of course, in other embodiments, the top cover 70 can also be an integral housing.

[0069] In some embodiments, the connecting portion 101b includes a first protruding structure 161 and a second protruding structure 162. The first protruding structure 161 is arranged on the pump housing 10. The first protruding structure 161 can be in the shape of a ring, such as a circular ring, an elliptical ring, or a square ring, and encloses the outlet 151. The second protruding structure 162 is arranged at least partially on the top cover 70. In some embodiments, the second protruding structure 162 is connected to the first protruding structure 161 on the side close to the top wall 12. The second protruding structure 162 protrudes from the side wall 11 and the top wall 12, respectively.

[0070] In some specific embodiments, the second protruding structure 162 includes a first protrusion 162a connected to the first protruding structure 161 and a second protrusion 162c arranged on the top cover 70. The first protrusion 162a is provided with a first gap 162b, and the second protrusion 162c is provided with a second gap 162d. The first gap 162b and the second gap 162d are in abutment to form the inlet 41. That is, part of the second protruding structure 162 is arranged on the pump housing 10, and the other part of the second protruding structure 162 is arranged on the top cover 70. Of course, in other embodiments, the second protruding structure 162 can also be formed entirely on the top cover 70.

[0071] Further, the connecting portion 101b is arranged at one side of the main housing 101a, and the first protruding structure 161 and the second protruding structure 162 of the connecting portion 101b are arranged along the axial direction of the main housing 101a. It should be noted that the axial direction in the embodiments of the present application refers to the direction of the rotation axis of the impeller. Specifically, in some embodiments, the liquid outlet 151 of the liquid outlet channel 15 is arranged to face the side wall 11, and the orthographic projection of the liquid outlet 151 on the side wall 11 falls entirely on the side wall 11. The liquid inlet channel 40 is arranged outside the side wall 11, and the liquid inlet channel 40 and the side wall 11 are arranged staggered along the direction of the rotation axis of the impeller, i.e., the liquid inlet channel 40 and the side wall 11 are arranged sequentially along the direction of the rotation axis of the impeller, and do not overlap, so that the blood flowing in the liquid inlet channel 40 does not change in height position, but flows along the direction perpendicular to the rotation axis.

[0072] In the embodiments, the first protruding structure 161 and the first protrusion 162a can be an integral structure and are integrally formed with the pump shell 10, so that no additional assembly is required, and the sealing performance can be ensured to avoid connection gaps.

[0073] When the adapter 50 is sleeved on the connecting portion 101b, the hole walls of the sleeve hole 51 are welded with the first protruding structure 161, the first protrusion 162a and the second protrusion 162c of the second housing 30, respectively. That is, a circle of hole walls and a circle of connecting portions 101b are welded along the circumferential direction of the sleeve hole 51. Specifically, the shape of the sleeve hole 51 matches the shape of the outer side surface of the connecting portion 101b, so as to fit the outer shape of the connecting portion 101b and be adapted to be sleeved on the outer side of the connecting portion 101b. For example, the connecting portion 101b can be formed by combining a larger semicircular structure and a smaller circular structure, and the sleeve hole 51 also includes a larger semicircular hole and a smaller circular hole which are in communication with each other.

[0074] For reference Figure 4 and Figure 6Further, the connecting portion 101b is provided with a limiting groove 17, and the adapter 50 is provided with a limiting protrusion 52 which is adapted to be engaged with the limiting groove 17. For example, the connecting portion 101b is provided with the limiting groove 17 on the outer side, and the adapter 50 is provided with the limiting protrusion 52 on the hole wall of the sleeve hole 51 which is adapted to be engaged with the limiting groove 17. Specifically, in some embodiments, when the first protrusion 162a extends along the tangent direction of the circular annular first protruding structure 161, and the two ends of the first protrusion 162a extend beyond the two opposite sides of the first protruding structure 161, two limiting grooves 17 are formed at the connection between the first protruding structure 161 and the first protrusion 162a, and the hole wall of the sleeve hole 51 is provided with one limiting protrusion 52 corresponding to each of the two limiting grooves 17. The limiting protrusion 52 and the limiting groove 17 are adapted to be engaged, which can pre-position the adapter 50 and the connecting portion 101b, avoid the rotation of the adapter 50 relative to the connecting portion 101b, and facilitate the subsequent welding operation by pre-positioning and clamping the adapter 50 and the connecting portion 101b.

[0075] Optionally, the side of the adapter 50 away from the main shell 101a is flush with the side of the connecting portion 101b away from the main shell 101a, so that when the end face of the access sleeve 60 abuts against the side of the adapter 50 away from the main shell 101a, the end face of the access sleeve 60 also abuts against the side of the connecting portion 101b away from the main shell 101a, and the contact area of the overall structure formed by the combination of the access sleeve 60, the adapter 50 and the connecting portion 101b is relatively large, and the sealing effect at the contact position is relatively good. Furthermore, after the side of the adapter 50 away from the main shell 101a is flush with the side of the connecting portion 101b away from the main shell 101a, when the adapter 50 and the connecting portion 101b are welded along the first direction, the welding position is not blocked, which is conducive to the welding operation and allows the welding condition to be observed at any time.

[0076] In addition, the side of the adapter 50 away from the main shell 101a can also be higher than the side of the connecting portion 101b away from the main shell 101a, so that the adapter 50 protrudes outwardly from the connecting portion 101b in the direction away from the side wall 11.

[0077] Optionally, the adapter 50 has a generally circular shape.

[0078] Please refer to the above description again Figure 5Further, the top of the pump shell 10 is further provided with a third protrusion 164, which is arranged around the communication inlet 18 of the top of the pump shell 10, and the two ends of the third protrusion 164 are connected to the two ends of the first protrusion 162a respectively, and the first protrusion 162a and the third protrusion 164 are jointly connected to form a closed annular structure, which extends along the entire outer edge of the first shell 20 and is sealingly connected to the outer edge of the first shell 20. In this embodiment, a magnetic ring is arranged in the area surrounded by the third protrusion 164, which can act on the impeller to ensure the stability of the impeller during rotation. After the first protrusion 162a and the third protrusion 164 are jointly connected to form a closed annular structure and are sealingly connected to the entire outer edge of the first shell 20, it is equivalent to that the first shell 20 seals the installation space of the magnetic ring formed by the closed annular structure, thereby avoiding the blood from entering the installation space of the magnetic ring and avoiding the formation of thrombus at this position, and ensuring the normal work of the magnetic ring.

[0079] Optionally, the closed annular structure jointly formed by the first protrusion 162a and the third protrusion 164 is welded to the outer edge of the first shell 20. Of course, in other embodiments, in addition to welding, it can also be bonding, which can also achieve sealing.

[0080] In some embodiments, the protruding height of the third protrusion 164 on the top wall 12 is less than the protruding height of the first protrusion 162a on the top wall 12, and the first shell 20 can abut against the side surface of the first protrusion 162a, so that when the first shell 20 is installed, the first protrusion 162a plays a certain directional limiting effect on the first shell 20.

[0081] For reference Figures 7 to 9 Further, the first shell 20 has a connecting port 21 (which will be introduced in the following embodiments), which corresponds to the communication inlet 18. The first shell 20 is provided with an inner protruding ring 22, which is arranged around the hole rim of the connecting port 21, and the inner protruding ring 22 is sealingly connected to the entire hole rim of the communication inlet 18 (see the first welding position S1 in Figure 9 Thus, it can avoid the blood from entering the installation space of the magnetic ring from the hole wall of the connecting port 21 and the hole wall of the communication inlet 18. The sealing connection mode of the inner protruding ring 22 to the entire hole rim of the communication inlet 18 includes but is not limited to welding and bonding.

[0082] Further, the top of the pump shell 10 is further provided with a fourth protrusion 165, which is arranged around the communication inlet 18, and the third protrusion 164 is arranged outside the fourth protrusion 165, and the space between the third protrusion 164 and the fourth protrusion 165 can accommodate the magnetic ring. The welding position of the inner protruding ring 22 and the top wall 12 of the pump shell 10 is located in the space surrounded by the fourth protrusion 165.

[0083] Optionally, the outer wall surface of the inner convex ring 22 is arranged in steps to abut against the fourth protrusion 165, that is, the outer wall surface of the inner convex ring 22 forms a stepped surface, and the fourth protrusion 165 abuts against the stepped surface. In this way, the structure on the top wall 12 for mounting the magnetic ring (i.e., the fourth protrusion 165) can be fully utilized to position the first shell 20.

[0084] Optionally, the inner wall surface of the inner convex ring 22 is flush with the hole wall of the communication inlet 18, and the end of the inner convex ring 22 abuts against the top wall 12.

[0085] It should be noted that the inner wall surface of the inner convex ring 22 refers to the surface forming the connection port 21, that is, the inner diameter of the inner convex ring 22, and the outer wall surface of the inner convex ring 22 refers to the surface opposite to the inner wall surface, that is, the outer diameter of the inner convex ring 22.

[0086] In some embodiments, the first shell 20 includes a first part 23 and a second part 24. The first part 23 is generally annular, and the hole enclosed by the annulus of the first part 23 forms a connection port 21, which is an opening at one end of the liquid inlet channel 40 and corresponds to the communication inlet 18. The second part 24 is connected to the peripheral surface of the first part 23 and is arc-shaped. The first part 23 and the second part 24 together approximate the shape of a “,”. The liquid inlet channel 40 starts from the end of the second part 24 away from the first part 23 and extends along the arc-shaped direction of the second part 24 to the connection port 21 on the first part 23.

[0087] Further, the side of the first part 23 facing the top wall 12 is provided with the inner convex ring 22 and an outer convex ring 25. The outer convex ring 25 is welded to the side of the third protrusion 164 away from the top wall 12, surrounds the inner convex ring 22, and forms an annular cavity between the outer convex ring 25 and the inner convex ring 22. The annular cavity can be used in cooperation with the third protrusion 164 and the fourth protrusion 165 to mount the magnet.

[0088] Please refer again to Figure 2 The first shell 20 and the second shell 30 together form the liquid inlet channel 40. One end of the liquid inlet channel 40 is the liquid inlet 41, and the other end is the connection port 42, which is located at the communication inlet 18 and communicates with the accommodation cavity 13. By separately arranging the first shell 20 and the second shell 30 and machining them together with the pump shell 10, the machining difficulty of the individual shell can be reduced, and a relatively complex liquid inlet channel 40 can be conveniently machined.

[0089] To make the structure compact, the first shell 20 is arranged on the top wall 12 and is attached to the top wall 12 for support.

[0090] When the first shell 20 and the second shell 30 jointly form the liquid inlet channel 40, a groove can be formed on each of the first shell 20 and the second shell 30, and the two grooves are spliced to form the liquid inlet channel 40. Alternatively, only one of the first shell 20 and the second shell 30 forms a groove.

[0091] The liquid inlet channel 40 is arc-shaped in the length direction thereof. When blood flows along the arc-shaped liquid inlet channel 40, the arc-shaped channel makes the blood flow more smoothly and has a small resistance. Correspondingly, the first shell 20 and the second shell 30 are both arc-shaped.

[0092] The cross section of the liquid inlet channel 40 can be approximately semicircular, which is beneficial to the flow of blood. Specifically, the cross section of the second shell 30 is circular arc-shaped, and the cross section is perpendicular to the length direction of the liquid inlet channel 40.

[0093] In some embodiments, the liquid inlet channel 40 is arc-shaped and has a bending position 43, and the bending position 43 is close to the connecting port 42, i.e., the bending position 43 is adjacent to the communication inlet 18. Specifically, the distance between the liquid inlet port 41 and the bending position 43 is much greater than the distance between the connecting port 42 and the bending position 43. When blood flows from the liquid inlet port 41 to the bending position 43, a large angle change occurs, and then the blood flows from the connecting port 42 into the accommodation cavity 13. Further, in the direction from the liquid inlet port 41 to the connecting port 42, the cross-sectional area of the liquid inlet channel 40 gradually decreases first and then gradually increases, and the minimum cross-sectional area of the liquid inlet channel 40 is located at the bending position 43.

[0094] Since a surgical incision is not provided on the artery, the directions of the liquid inlet channel 40 and the liquid outlet channel 15 are both set to be the same direction. In addition, considering the smoothness and large kinetic energy of blood flowing out of the liquid outlet channel 15 under the action of the impeller, the blood is thrown in the tangential direction of the impeller, i.e., the direction of the liquid outlet channel 15 is set along the tangent direction of the circular arc-shaped outer periphery of the pump shell 10, so the direction of the liquid inlet channel 40 is also set along the tangent direction of the circular arc-shaped outer periphery of the pump shell 10. However, when the blood enters the accommodation cavity 13 in the direction along the rotation axis of the impeller, the blood can obtain a better kinetic energy after the action of the impeller, so the communication inlet 18 is arranged on the top wall 12 of the pump shell 10 to change the flow direction of the blood, and thus the direction of the blood flowing from the liquid inlet channel 40 to the communication inlet 18 needs to be changed. In the embodiments of the present application, the first shell 20 and the second shell 30 are both arranged to be arc-shaped, so that the liquid inlet channel 40 is an arc-shaped channel and has a bending position 43. The flow direction of the blood at the bending position 43 is changed greatly, and then the blood quickly enters the accommodation cavity 13. The arc-shaped channel is beneficial to the smooth flow of blood and has a small kinetic energy loss.

[0095] In the inflow direction of the blood, the cross-sectional area of the inlet channel 40 first gradually decreases and then gradually increases, so that the blood first gradually increases in speed between the inlet port 41 and the bending position 43, and reaches the maximum speed when reaching the bending position 43, at which time the blood has approached the communication inlet 18, for example, almost located at the edge of the communication inlet 18. The cross-sectional area of the bending position 43 to the connecting port 42 gradually increases, so that the blood is released at the bending position 43, the resistance decreases, and the blood can quickly enter the receiving cavity 13, so that there is no obvious flow separation zone in the inlet channel 40, and the blood flow performance is better. Furthermore, although generally the speed of the blood decreases when flowing from a smaller cross-section to a larger cross-section, since the distance between the bending position 43 and the connecting port 42 is extremely small relative to the length of the entire inlet channel 40, much smaller than half the length of the entire inlet channel 40, the influence of the decrease in blood speed can be ignored. On the contrary, the gradual expansion of the channel between the bending position 43 and the connecting port 42 can also make the blood be instantaneously released quickly, and the increase in cross-sectional area can provide more blood flow, that is, the blood flow per unit time can be increased, so that the blood pump 100 with a smaller volume can meet the power requirements of the blood.

[0096] Further, please refer to Figure 2 and Figure 10 , the second shell 30 has a highest point 44 at the bending position 43, and the height H of the inlet channel 40 at the highest point 44 is greater than the height of the inlet channel 40 at any other position, the height direction is perpendicular to the top wall 12, and the height direction is also parallel to the axial direction of the main shell 101a. In this embodiment, the inlet channel 40 is bulged upward at the bending position 43, and when the blood turns at the bending position 43, the upward bulging space can provide smoothness for the blood turning and avoid obvious flow separation of the blood. At the same time, the upward bulging design can concentrate the blood in the upward bulging space (referring to the direction parallel to the rotation axis) rather than dispersing the blood to the two sides, which is beneficial to the concentrated release of the blood at the bending position 43.

[0097] In addition, each position of the inlet channel 40 is smoothly connected by a circular arc to avoid sharp corners that hinder the flow of blood. Therefore, the inlet channel 40 can be smoothly connected by a plurality of circular arc surfaces with different curvatures.

[0098] The present application also provides a blood pump 100, which comprises a shell assembly 101, an impeller and an inlet and outlet sleeve 60. The structure of the shell assembly 101 is described in the above embodiments, which will not be described here.

[0099] The present application also provides a manufacturing method of a shell assembly, which comprises the following steps:

[0100] sealingly connecting the inner protruding ring 22 of the first shell 20 with the top of the pump shell 10;

[0101] sealingly connecting the outer edge of the first shell 20 with the first protrusion 162a and the third protrusion 164 on the top wall 12 of the pump shell 10;

[0102] sealingly connecting the outer edge of the second shell 30 with the first shell 20 and the first protrusion 162a, respectively;

[0103] sealingly connecting the inner wall of the sleeve socket 51 of the adapter 50 with the outer side of the connecting portion 101b;

[0104] abutting the end face of one end of the access sleeve 60 with the side of the adapter 50 away from the pump shell 10, and sealingly connecting the contact position of the adapter 50 and the access sleeve 60 from the outside.

[0105] Please refer again to Figure 8 , the pump shell 10 can specifically include a lower shell 193, a middle shell 192, and an upper shell 191, the middle shell 192 is located between the lower shell 193 and the upper shell 191, a space for installing the motor is formed between the middle shell 192 and the lower shell 193, and a space for installing the impeller, i.e., the above-mentioned accommodation cavity 13, is formed between the middle shell 192 and the upper shell 191.

[0106] In the above, the sealingly connecting manner includes but is not limited to welding and bonding.

[0107] Taking welding as an example, in step S10, before the middle shell 192 is assembled, the welding tool can be inserted into the communication inlet 18 from the inside of the upper shell 191 along the rotation axis, and the inner protruding ring 22 of the first shell 20 is welded with the top wall 12 of the pump shell 10, and a first welding position S1 (as shown in Figure 9 ) is formed at the hole edge of the communication inlet 18 close to the top wall 12.

[0108] In step S20, the outer edge of the first shell 20 and the side thereof toward the top wall 12 can be welded with the first protrusion 162a and the third protrusion 164 on the top wall 12 of the pump shell 10 from the outside of the upper shell 191, thereby forming a circle of second welding positions S2 (as shown in Figure 3 ).

[0109] When the first welding position and the second welding position are formed, a sealed space is formed between the two, and a magnetic ring is installed in the sealed space to prevent blood from contacting the magnetic ring.

[0110] In step S30, the outer edges of the second shell 30 are welded with the first shell 20 and the first protrusion 162a respectively to form a third welding position S3 (as shown in FIG. 1), so that the liquid inlet channel 40 is completely sealed except for the openings at both ends thereof, thereby preventing liquid leakage of the liquid inlet channel 40.

[0111] In step S40, the hole wall of the adapter 50 is welded with the outer side of the connecting portion 101b to form a fourth welding position S4 (as shown in FIG. 4), which is located on the side of the connecting portion 101b away from the side wall 11, thereby realizing the sealing between the inner side of the access sleeve 60 and the connecting portion 101b. In addition, when welding the adapter 50 and the connecting portion 101b, the welding can be performed from the side away from the main shell 101a, i.e., in the first direction, without being blocked by other components. Figure 2

[0112] In step S50, the end surface of one end of the access sleeve 60 is abutted against the side of the adapter 50 away from the pump shell 10, and the adapter 50 is welded with the access sleeve 60 from the outside to form a ring-shaped fifth welding position S5 (as shown in FIG. 5). Figure 10 Figure 11

[0113] In the above, in the process of laser welding, the parameters of the laser can be reasonably set to improve the welding strength and efficiency. For example, the peak power of the laser is 1.2-1.4 kW, and the specific value of the peak power can be 1.2, 1.3 or 1.4 kW, etc. The frequency of the laser is 6-9 HZ, and the specific value of the frequency can be 6, 7 or 9 HZ, etc. The single-pulse laser energy is 1.56-7.15 J, and the specific value of the single-pulse laser energy can be 1.56, 2.30 or 7.15 J, etc. The pulse width of the single-pulse laser can be 1.2-2 ms, and the specific pulse width of the single-pulse laser can be 1.2, 1.8 or 2 ms, etc.

[0114] In addition, the spot diameter of the laser is 0.15-0.3 mm, and optionally, the spot diameter is 0.15-0.2 mm, and the specific value can be 0.15, 0.18, 0.2 mm, etc. If the spot diameter is too large, it will cause the shell assembly 101 to be burned through, and if the spot diameter is too small, it will result in poor welding performance and poor sealing effect.

[0115] ​​​It should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the same; although the foregoing embodiments of the present application have been described in detail, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A housing assembly, characterized in that, include: The main housing has a connecting portion for connecting to an inlet and outlet sleeve. The main housing has an internal receiving cavity, and an inlet channel and an outlet channel communicating with the receiving cavity. The main housing includes a pump housing with the receiving cavity, and a top cover connected to the pump housing and having the inlet channel. The pump housing has a communicating inlet. The inlet channel has an inlet port penetrating the connecting portion. One end of the inlet channel away from the inlet port communicates with the communicating inlet. The outlet channel has an outlet port penetrating the connecting portion. The connecting portion includes a first protruding structure for forming the outlet port and a second protruding structure for forming the inlet port. The first protruding structure is disposed on the pump housing, and the second protruding structure is at least partially formed on the top cover. as well as The adapter has a socket hole, which is sleeved and sealed to the connecting part. The end of the adapter away from the main housing can be connected to the inlet and outlet sleeve.

2. The housing assembly according to claim 1, characterized in that, The connecting part is provided with a limiting groove, and the adapter protrudes with a limiting protrusion, which is adapted to engage with the limiting groove.

3. The housing assembly according to claim 2, characterized in that, The connecting portion includes a first protruding structure for forming the liquid outlet and a second protruding structure for forming the liquid inlet, and the limiting groove is provided between the first protruding structure and the second protruding structure.

4. The housing assembly according to claim 1, characterized in that, The connecting portion is disposed on one side of the main housing, and the first protruding structure and the second protruding structure are disposed along the axial direction of the main housing.

5. The housing assembly according to claim 1, characterized in that, The second protruding structure includes a first protrusion connected to the first protruding structure and a second protrusion disposed on the top cover. The first protrusion has a first notch, and the second protrusion has a second notch. The first notch and the second notch are joined together to form the liquid inlet.

6. The housing assembly according to claim 1, characterized in that, The top cover includes a first housing and a second housing, which together form the liquid inlet channel; The end of the liquid inlet channel away from the liquid inlet also extends through the first housing, and a connection port is formed on the first housing, which is provided corresponding to the communication inlet on the top of the pump housing.

7. The housing assembly according to claim 6, characterized in that, The first housing is provided with an inner convex ring, which surrounds the edge of the hole of the connection port and is sealed to the edge of the hole of the communication inlet.

8. The housing assembly according to claim 5, characterized in that, The top of the pump housing is also provided with a third protrusion, which surrounds the communication inlet and connects with the first protrusion to form a closed ring structure. The closed ring structure extends along the entire outer edge of the first housing of the top cover and is sealed to the outer edge of the first housing.

9. The housing assembly according to claim 8, characterized in that, The third protrusion protrudes from the pump housing at a height less than that of the first protrusion, and the first housing can abut against the side of the first protrusion.

10. The housing assembly according to any one of claims 1 to 9, characterized in that, The liquid inlet channel is bent and has a bend position, which is located near the connection port of the liquid inlet channel; From the inlet to the connection port, the cross-sectional area of ​​the inlet channel gradually decreases first and then gradually increases, and the minimum cross-sectional area of ​​the inlet channel is located at the bend.

11. The housing assembly according to claim 10, characterized in that, The second housing of the main housing has a highest point at the bend position, and the height of the liquid inlet channel at the highest point is greater than the height of the liquid inlet channel at any other position. The direction of the height is parallel to the axis of the main housing.

12. A blood pump, characterized in that, include: The housing assembly as described in any one of claims 1 to 11; An impeller is disposed within the receiving cavity and is capable of rotating about a rotation axis; as well as, The inlet and outlet sleeve has an end face at one end connected and sealed to the end of the adapter facing away from the main housing. The inlet and outlet sleeve has an inflow channel and an outflow channel. The inflow channel is connected to the liquid inlet, and the outflow channel is connected to the liquid outlet.

13. A method for manufacturing a housing assembly according to any one of claims 1 to 11, characterized in that, Includes the following steps: The inner convex ring of the first housing is sealed to the top of the pump housing; The outer edge of the first housing is sealed to the first and third protrusions on the pump housing; The outer edge of the second housing is sealed and connected to the first housing and the first protrusion, respectively. The hole wall of the adapter sleeve is sealed to the outer side of the connecting part; The end face of the inlet / outlet sleeve is aligned with the side of the adapter that is away from the pump casing, and the contact point between the adapter and the inlet / outlet sleeve is sealed from the outside.

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