CN214837904U - Bearing seat structure - Google Patents
Bearing seat structure Download PDFInfo
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- CN214837904U CN214837904U CN202120881806.1U CN202120881806U CN214837904U CN 214837904 U CN214837904 U CN 214837904U CN 202120881806 U CN202120881806 U CN 202120881806U CN 214837904 U CN214837904 U CN 214837904U
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- mounting
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- impeller
- bearing seat
- contact surface
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Abstract
The utility model discloses a bearing seat structure, which comprises a bearing seat body, wherein the bearing seat body is a cylinder with a through mounting hole in the center, the outer surface of the bearing seat body comprises a conduit channel contact surface and a blood flow impact surface which are sequentially connected, and the inner surface of the bearing seat body comprises a bearing tail cover mounting surface, a bearing mounting surface, a sealing cover contact surface and an impeller boss mounting surface which are sequentially connected and coaxially arranged; the duct channel contact surface and the bearing tail cover mounting surface are connected through end surfaces perpendicular to the duct channel contact surface and the bearing tail cover mounting surface, and the blood flow impact surface is connected with the impeller boss mounting surface through a curved surface. The utility model discloses realize with miniature pump blood impeller and outflow window structure collaborative work, realize that the blood circulation supports required pump blood flow and stably flows, bearing frame body external diameter has the processing feasibility within 3mm-8 mm.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to a bearing frame structure.
Background
Percutaneous Coronary Intervention (PCI) is a commonly used effective method for treating coronary heart disease, and compared with the heart bypass surgery, the PCI surgery has the advantages of lower risk, smaller wound, lower surgery difficulty and quicker postoperative recovery. In addition, PCI surgery is also applicable to the rescue of acute myocardial infarction by rapidly restoring perfusion of the blood flow occluding the blood vessels to restore the patient's myocardial status.
The artificial left ventricle auxiliary device (pLVAD) capable of being implanted through the skin is a miniaturized device which actively pumps blood in a left ventricle into an aorta by acting through a blood pump, the blood pumping performance is completely determined by the operation mode of the blood pump, the device does not depend on the body state of a patient, belongs to an active blood circulation supporting device, and overcomes the defects of passive blood circulation supporting devices such as an aortic counterpulsation balloon (IABP). Through the artifical left ventricle auxiliary device that PCI operation was implanted, can provide more stable blood circulation support to the patient in the high-risk PCI operation, alleviate left ventricle burden when improving coronary artery and distal organ perfusion, be favorable to patient's sign in the art and stabilize and postoperative rehabilitation.
The shorter-term supplemental pllvad devices implanted via PCI are expected to have higher specifications, with the core component impeller requiring a tiny size to achieve the required pumping flow at high speed and at different pressure differentials in the body. In this case, in addition to the impeller structure and its novel pump blood outflow structure, there is also a need for an improvement in the transition structure of the bearing seat between the impeller hub and the outflow window, which, by co-operation, achieves a stable pump blood flow of the entire device.
Therefore, a bearing seat structure with a small external diameter (less than 8 mm) and processing feasibility, which can be matched with a micro blood pumping impeller and a novel outflow window structure thereof to realize stable flow of blood flow needed by blood circulation support is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a bearing frame structure is provided, with miniature pump blood impeller and the cooperation work of outflow window structure, realize that the blood circulation supports required pump blood flow and stably flows.
The technical scheme that the utility model adopts for solving the above technical problems is to provide a bearing seat structure, including the bearing seat body, the bearing seat body is a cylinder with a through mounting hole in the center, the outer surface of the bearing seat body includes a catheter channel contact surface and a blood flow impact surface which are connected in sequence, the inner surface of the bearing seat body includes a bearing tail cover mounting surface, a bearing mounting surface, a sealing cover contact surface and an impeller boss mounting surface which are connected in sequence and coaxially arranged; the conduit channel contact surface is connected with the bearing tail cover mounting surface through end surfaces perpendicular to the conduit channel contact surface and the bearing tail cover mounting surface, and the blood flow impact surface is connected with the impeller boss mounting surface through a curved surface; the blood flow impact surface comprises a first flow impact surface and a second flow impact surface which are smoothly connected, the first flow impact surface is connected with the contact surface of the conduit channel, and the second flow impact surface is connected with the impeller boss mounting surface; the generatrix of the first flow impingement surface is an outwardly convex curve.
Furthermore, the contact surface of the conduit channel is a cylindrical surface, the diameter of the contact surface of the conduit channel is 3mm-8mm, and the axial length of the contact surface of the conduit channel is 4mm-6 mm.
Further, a tangent line at the junction of the first flow impingement surface and the conduit channel interface coincides with the conduit channel interface.
Further, a generatrix of the first flow impact surface is an elliptic curve; the impeller is arranged in the impeller boss mounting surface, the length of the long axis of the elliptic curve is the axial length of a generatrix of a blood flow impact surface, and the length of the short axis of the elliptic curve is the difference between the radius of a contact surface of a conduit channel and the radius of the impeller; the radius of the impeller is larger than that of the impeller boss mounting surface and smaller than that of the conduit channel contact surface; the first flow impingement surface has a generatrix length equal to or less than 1/4 of the circumference of the ellipse.
Further, the second flow impingement surface is perpendicular to an axis of the bearing housing body; the second flow impact surface is in transitional connection with the impeller boss mounting surface through an arc surface, and the radius of the arc surface is 0.2 mm.
Further, the mounting surface of the bearing seat tail cover comprises a mounting shaft surface and a mounting end surface, the mounting shaft surface is a cylindrical surface, the mounting end surface is a circular ring surface, the mounting shaft surface and the mounting end surface are vertically arranged, the diameter of the mounting shaft surface is 2.5mm-7mm, the axial length is 0.6mm-1mm, the outer diameter of the mounting end surface is 2.3mm-6.8mm, and the inner diameter of the mounting end surface is 2.2mm-6.2 mm; the mounting shaft surface and the mounting end surface are in transitional connection through an arc surface, and the radius of the arc surface is 0.2 mm.
Furthermore, the bearing mounting surface is a cylindrical surface, the diameter of the bearing mounting surface is 2mm-6mm, and the axial length is 2.5mm-3.0 mm; the mounting end face is in transitional connection with the bearing mounting face through an annular inclined face, and the inclination angle of the annular inclined face is 45 degrees.
Furthermore, the contact surface of the sealing cover is a torus, the outer diameter of the contact surface of the sealing cover is 1.8mm-5.8mm, and the inner diameter of the contact surface of the sealing cover is 1mm-1.5 mm; the contact surface of the sealing cover is in transitional connection with the bearing mounting surface through an arc surface, and the radius of the arc surface is 0.2 mm.
Furthermore, the impeller boss mounting surface is a cylindrical surface and is vertically connected with the contact surface of the sealing cover, the diameter of the impeller boss mounting surface is 1mm-1.5mm, and the axial length of the impeller boss mounting surface is 2mm-2.5 mm.
The utility model discloses contrast prior art has following beneficial effect: the utility model provides a bearing seat structure, the bearing seat body is internally provided with a bearing tail cover mounting surface, a bearing mounting surface, a sealing cover contact surface and an impeller boss mounting surface, so that the mounting connection of a bearing tail cover, a bearing and an impeller is realized; the bearing seat body is externally provided with a conduit channel contact surface and a blood flow impact surface, the conduit channel contact surface is cooperated with an outflow window structure, the curved surface structure of the blood flow impact surface ensures the stability of the pump blood flow, reduces the hemolysis possibility of blood, realizes the cooperative work with the micro pump blood impeller and the outflow window structure thereof, realizes the stable flow of the pump blood flow required by the blood circulation support, and has the processing feasibility when the outer diameter of the bearing seat body is within 3mm-8 mm.
Drawings
Fig. 1 is a schematic structural view of a bearing seat according to an embodiment of the present invention;
fig. 2 is a sectional view of a bearing seat structure according to an embodiment of the present invention;
fig. 3 is an enlarged view of the blood flow impact surface according to the embodiment of the present invention.
In the figure: 1. a blood flow impingement surface; 2. a conduit channel interface; 3. a bearing tail cover mounting surface; 4. a bearing mounting surface; 5. a seal cap contact surface; 6. an impeller boss mounting surface; 1-1, a first flow impingement surface; 1-2, second flow impingement surface.
Detailed Description
The invention is further described with reference to the following figures and examples.
Fig. 1 is a schematic structural view of a bearing seat according to an embodiment of the present invention; fig. 2 is a sectional view of a bearing seat structure according to an embodiment of the present invention.
Referring to fig. 1 and 2, a bearing seat structure according to an embodiment of the present invention includes a bearing seat body, the bearing seat body is a cylinder with a through mounting hole in the center, the outer surface of the bearing seat body includes a conduit channel contact surface 2 and a blood flow impact surface 1, which are sequentially connected, and the inner surface of the bearing seat body includes a bearing tail cover mounting surface 3, a bearing mounting surface 4, a sealing cover contact surface 5 and an impeller boss mounting surface 6, which are sequentially connected and coaxially disposed; the duct channel contact surface 2 and the bearing tail cover mounting surface 3 are connected through end surfaces perpendicular to the duct channel contact surface 2 and the bearing tail cover mounting surface 3, and the blood flow impact surface 1 is connected with the impeller boss mounting surface 6 through a curved surface.
Specifically, the conduit channel contact surface 2 is a cylindrical surface, the diameter of the conduit channel contact surface 2 is 3mm-8mm, and the axial length is 4mm-6 mm. The catheter channel interface 2 is in contact with the inner surface of the outflow channel of the blood pump catheter to support and seal.
With continuing reference to fig. 2, in the bearing seat structure according to the embodiment of the present invention, the bearing seat tail cover mounting surface 3 includes a mounting axial surface and a mounting end surface, the mounting axial surface is a cylindrical surface, the mounting end surface is a torus, the mounting axial surface and the mounting end surface are vertically arranged, the diameter of the mounting axial surface is 2.5mm-7mm, the axial length is 0.6mm-1mm, the outer diameter of the mounting end surface is 2.3mm-6.8mm, and the inner diameter of the mounting end surface is 2.2mm-6.2 mm; the mounting shaft surface and the mounting end surface are in transitional connection through an arc surface, and the radius of the arc surface is 0.2 mm. The bearing seat tail cover mounting surface 3 is in close contact with the bearing seat tail cover to play a role in sealing and supporting.
Specifically, the bearing mounting surface 4 is a cylindrical surface, the diameter of the bearing mounting surface 4 is 2mm-6mm, and the axial length is 2.5mm-3.0 mm; the mounting end face is in transitional connection with the bearing mounting face 4 through an annular inclined plane, and the inclination angle of the annular inclined plane is 45 degrees. The bearing mounting surface 4 and the bearing realize the stable limitation of the outer ring of the bearing through interference fit.
Specifically, the contact surface 5 of the sealing cover is a torus, the outer diameter of the contact surface 5 of the sealing cover is 1.8mm-5.8mm, and the inner diameter of the contact surface 5 of the sealing cover is 1mm-1.5 mm; the contact surface 5 of the sealing cover is in transitional connection with the bearing mounting surface 4 through an arc surface, and the radius of the arc surface is 0.2 mm.
Specifically, the impeller boss mounting surface 6 is a cylindrical surface, the impeller boss mounting surface 6 is vertically connected with the seal cover contact surface 5, the diameter of the impeller boss mounting surface 6 is 1mm-1.5mm, and the axial length is 2mm-2.5 mm. The impeller boss mounting surface 6 is in clearance fit with the boss of the impeller.
Referring to fig. 3, in the bearing seat structure of the embodiment of the present invention, the blood flow impact surface 1 includes a first flow impact surface 1-1 and a second flow impact surface 1-2 which are connected smoothly, the first flow impact surface 1-1 is connected with the conduit channel contact surface 2, and the second flow impact surface 1-2 is connected with the impeller boss mounting surface 6; the generatrix of the first flow impact surface 1-1 is a curve protruding outwards, and the tangent line of the joint of the first flow impact surface 1-1 and the conduit channel contact surface 2 is superposed with the conduit channel contact surface 2; an impeller is arranged in the impeller boss mounting surface 6.
Preferably, the generatrix of the first flow impingement surface 1-1 is an elliptic curve; the length of the major axis of the elliptic curve is the axial length of the generatrix of the blood flow impact surface 1, and the length of the minor axis of the elliptic curve is the difference between the radius of the catheter channel contact surface 2 and the radius of the impeller; the center of the impeller is positioned on the intersection point of the axial vertical line at the radius of the impeller and the interface of the blood flow impact surface 1 and the contact surface 2 of the catheter channel; the radius of the impeller is larger than that of the impeller boss mounting surface and smaller than that of the conduit channel contact surface 2, and the length of a generatrix of the first flow impact surface 1-1 is smaller than or equal to 1/4 of the circumference of the ellipse. The second flow impact surface 1-2 is vertical to the axis of the bearing seat body; the second flow impact surface 1-2 is in transitional connection with the impeller boss mounting surface 6 through an arc surface, and the radius of the arc surface is 0.2 mm.
To sum up, in the bearing seat structure of the embodiment of the present invention, the bearing tail cover mounting surface 3, the bearing mounting surface 4, the sealing cover contact surface 5 and the impeller boss mounting surface 6 are arranged inside the bearing seat body, so as to realize the mounting connection of the bearing tail cover, the bearing and the impeller; the bearing seat body is externally provided with a conduit channel contact surface 2 and a blood flow impact surface 1, the conduit channel contact surface 2 is in structural cooperation with an outflow window, the curved surface structure of the blood flow impact surface 1 ensures the stability of the pump blood flow, reduces the hemolysis possibility of blood, realizes the cooperative work with a micro pump blood impeller and the outflow window structure thereof, realizes the stable flow of the pump blood flow required by blood circulation support, and has the processing feasibility when the outer diameter of the bearing seat body is within 3mm-8 mm.
Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A bearing seat structure is characterized by comprising a bearing seat body, wherein the bearing seat body is a cylinder with a through mounting hole in the center, the outer surface of the bearing seat body comprises a conduit channel contact surface and a blood flow impact surface which are sequentially connected, and the inner surface of the bearing seat body comprises a bearing tail cover mounting surface, a bearing mounting surface, a sealing cover contact surface and an impeller boss mounting surface which are sequentially connected and coaxially arranged; the conduit channel contact surface is connected with the bearing tail cover mounting surface through end surfaces perpendicular to the conduit channel contact surface and the bearing tail cover mounting surface, and the blood flow impact surface is connected with the impeller boss mounting surface through a curved surface; the blood flow impact surface comprises a first flow impact surface and a second flow impact surface which are smoothly connected, the first flow impact surface is connected with the contact surface of the conduit channel, and the second flow impact surface is connected with the impeller boss mounting surface; the generatrix of the first flow impingement surface is an outwardly convex curve.
2. A bearing housing arrangement according to claim 1, wherein the conduit passage contact surface is cylindrical, the conduit passage contact surface having a diameter of from 3mm to 8mm and an axial length of from 4mm to 6 mm.
3. A bearing housing arrangement according to claim 1 wherein the tangent to the junction of the first flow impingement surface and the conduit channel interface coincides with the conduit channel interface.
4. The bearing housing structure of claim 1 wherein said impeller boss mounting surface has an impeller mounted therein, and a generatrix of said first flow impingement surface is an elliptical curve; the length of the long axis of the elliptic curve is the axial length of a generatrix of a blood flow impact surface, and the length of the short axis of the elliptic curve is the difference between the radius of a contact surface of a catheter channel and the radius of an impeller; the radius of the impeller is larger than that of the impeller boss mounting surface and smaller than that of the conduit channel contact surface; the first flow impingement surface has a generatrix length equal to or less than 1/4 of the perimeter of the elliptical curve.
5. The bearing carrier structure of claim 1 wherein the second flow impingement surface is perpendicular to the axis of the bearing carrier body; the second flow impact surface is in transitional connection with the impeller boss mounting surface through an arc surface, and the radius of the arc surface is 0.2 mm.
6. The bearing pedestal structure according to claim 1, wherein the bearing pedestal tail cover mounting surface comprises a mounting shaft surface and a mounting end surface, the mounting shaft surface is a cylindrical surface, the mounting end surface is a torus, the mounting shaft surface and the mounting end surface are vertically arranged, the diameter of the mounting shaft surface is 2.5mm-7mm, the axial length is 0.6mm-1mm, the outer diameter of the mounting end surface is 2.3mm-6.8mm, and the inner diameter of the mounting end surface is 2.2mm-6.2 mm; the mounting shaft surface and the mounting end surface are in transitional connection through an arc surface, and the radius of the arc surface is 0.2 mm.
7. The bearing carrier structure of claim 6 wherein said bearing mounting surface is cylindrical, said bearing mounting surface having a diameter of 2mm to 6mm and an axial length of 2.5mm to 3.0 mm; the mounting end face is in transitional connection with the bearing mounting face through an annular inclined face, and the inclination angle of the annular inclined face is 45 degrees.
8. The bearing housing structure of claim 1 wherein the seal gland contacting surface is a torus, the seal gland contacting surface has an outer diameter of 1.8mm to 5.8mm, the seal gland contacting surface has an inner diameter of 1mm to 1.5 mm; the contact surface of the sealing cover is in transitional connection with the bearing mounting surface through an arc surface, and the radius of the arc surface is 0.2 mm.
9. The bearing housing structure of claim 1, wherein the impeller boss mounting surface is a cylindrical surface, the impeller boss mounting surface is perpendicularly connected with the seal cover contact surface, the impeller boss mounting surface has a diameter of 1mm to 1.5mm and an axial length of 2mm to 2.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120881806.1U CN214837904U (en) | 2021-04-27 | 2021-04-27 | Bearing seat structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120881806.1U CN214837904U (en) | 2021-04-27 | 2021-04-27 | Bearing seat structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214837904U true CN214837904U (en) | 2021-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120881806.1U Active CN214837904U (en) | 2021-04-27 | 2021-04-27 | Bearing seat structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214837904U (en) |
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2021
- 2021-04-27 CN CN202120881806.1U patent/CN214837904U/en active Active
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