Sealing structure and high-speed rotating part

Abstract

The utility model relates to cell processing equipment, in particular to a sealing structure which comprises an inner sealing part, an outer sealing part and a wrinkle part, the wrinkle part is in a downward protruding arc shape and is used for connecting the inner sealing part and the outer sealing part, the inner side of the inner sealing part is used for sealing, and the outer side of the outer sealing part is used for sealing. The corrugated part is arranged, so that the outer sealing part deforms more easily in the radial direction, the inner sealing part is not affected by the radial direction, and the sealing state can be continuously kept.

Description

Technical Field

[0001] The utility model relates to cell processing equipment, in particular to a sealing structure and a high-speed rotating part. Background Art

[0002] In a centrifugal blood cell separation device, the centrifuge cup is an extremely important consumable. The centrifuge cup separates cell suspensions of different densities by high-speed rotation. In order to prevent external bacteria from contaminating the cell liquid in the centrifuge cup, the centrifuge cup needs to use a rotating sealing structure. The existing conventional sealing structure has the following problems:

[0003] 1) There are errors in the actual processing and assembly of sealing structural parts, resulting in substandard sealing performance;

[0004] 2) The sealing materials used (PTFE, PE, etc.) have poor wear resistance and will cause significant wear during high-speed rotation, leading to seal failure;

[0005] 3) Impurities generated by friction require the use of additional shielding components for collection. Summary of the invention

[0006] In order to solve the above problems, the utility model provides a sealing structure and a high-speed rotating part, which adopts a pleated seal and can deform in the radial direction to ensure the sealing at the shaft core. The technical solution adopted by the utility model is as follows:

[0007] A sealing structure comprises an inner sealing part, an outer sealing part and a folded part, wherein the folded part is in an arc shape protruding downward and is used to connect the inner sealing part and the outer sealing part, the inner side of the inner sealing part is used for sealing, and the outer side of the outer sealing part is used for sealing.

[0008] In the above sealing structure, the thickness of the pleated portion is smaller than or much smaller than the thickness of the inner sealing portion.

[0009] In the above sealing structure, a plurality of concave rings distributed at intervals are provided on the inner side of the inner sealing portion.

[0010] In the above sealing structure, a plurality of convex rings distributed at intervals are arranged on the outer side of the outer sealing portion.

[0011] The utility model also relates to a high-speed rotating part, which is a centrifugal cup, including a cup cover and an axis core, an upper seal and a lower seal are installed between the axis core and the cup cover hole, and the upper seal and the lower seal are any of the above-mentioned sealing structures.

[0012] The beneficial effect of the utility model is that the pleated part is provided to make the outer sealing part deform more easily in the radial direction, so that the inner sealing part is not affected by the radial direction and can maintain the sealing state continuously. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a high-speed rotating part in an embodiment of the utility model;

[0014] Figure 2 This is a schematic diagram of the sealing structure of an embodiment of the utility model;

[0015] Figure 3 This is a schematic diagram of the state of the sealing structure of an embodiment of the utility model when subjected to radial force.

[0016] In the figure: 1 is a cup cover, 2 is a shaft core, 3 is a bearing, 4 is an upper seal, 5 is a lower seal, 41 is an inner seal portion, 42 is a pleated portion, 43 is an outer seal portion, 44 is a convex ring, and 45 is a concave ring. DETAILED DESCRIPTION

[0017] The technical content of the present utility model is described in detail below in conjunction with the accompanying drawings.

[0018] One of the present embodiments is a sealing structure, including an inner sealing portion 41, an outer sealing portion 43 and a pleated portion 42, wherein the pleated portion 42 is in an arc shape protruding downward and is used to connect the inner sealing portion 41 and the outer sealing portion 43, the inner side of the inner sealing portion 41 is used for sealing, and the outer side of the outer sealing portion 43 is used for sealing.

[0019] In the above sealing structure, the thickness of the folded portion 42 is smaller than or much smaller than the thickness of the inner sealing portion, that is, Figure 2 In the middle, a<b or a<<b, it is easy to deform in the radial direction. Even if the sealing structure and the shaft core 2 are not coaxial during assembly, or when the components rotate at high speed and there is vibration causing the bearing 3 and the sealing structure to be not coaxial, the inner sealing part 41 can still be tightly fitted on the shaft core to maintain a good sealing state.

[0020] The above sealing structure has several concave rings arranged at intervals on the inner side of the inner sealing part 41 and several convex rings arranged at intervals on the outer side of the outer sealing part 43, which can enhance the sealing performance.

[0021] In order to improve wear resistance, the sealing structure adopts wear-resistant elastic materials such as fluororubber, which has extremely low wear during long-term operation. At the same time, when running at high speed, the wear on the shaft core is extremely low, and there is no need to shield the components to collect impurities.

[0022] The second embodiment of the present invention is a high-speed rotating part, which is a centrifugal cup, including a cup cover 1 and a shaft core 2. An upper seal 4 and a lower seal 5 are installed between the shaft core 2 and the cup cover hole. The upper seal 4 and the lower seal 5 both adopt the above-mentioned sealing structure, and lubricating oil can be applied to the surface of the shaft core.

Claims

1. A sealing structure, characterized in that: The invention comprises an inner sealing portion (41), an outer sealing portion (43) and a folded portion (42); the folded portion (42) is in an arc shape protruding downward and is used to connect the inner sealing portion (41) and the outer sealing portion (43); the inner side of the inner sealing portion (41) is used for sealing, and the outer side of the outer sealing portion (43) is used for sealing.

2. The sealing structure according to claim 1, characterized in that: The thickness of the pleated portion (42) is smaller than or much smaller than the thickness of the inner sealing portion.

3. The sealing structure according to claim 1, characterized in that: The inner side of the inner sealing portion (41) is provided with a plurality of concave rings distributed at intervals.

4. The sealing structure according to claim 1, characterized in that: The outer side of the outer sealing portion (43) is provided with a plurality of convex rings distributed at intervals.

5. A high-speed rotating part, characterized in that: The high-speed rotating component is a centrifugal cup, comprising a cup cover (1) and a shaft core (2), an upper seal (4) and a lower seal (5) being installed between the shaft core (2) and the cup cover hole, and the upper seal (4) and the lower seal (5) are both sealing structures according to any one of claims 1 to 4.

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