Centrifugal machine motor structure

Abstract

The utility model discloses a centrifuge motor structure, which comprises a lower end cover, a stator assembly, an upper end cover and a motor shaft, a stator is arranged on the lower end cover, a rotor assembly is arranged in the stator assembly, the upper end cover is arranged above the stator and is fixedly connected with the stator assembly, the lower part of the motor shaft is connected with the lower end cover through a first bearing, and the lower part of the motor shaft is connected with the upper end cover through a second bearing. And the upper part of the lower end cover sequentially penetrates through the rotor assembly and the upper end cover and is connected with the upper end cover through a second bearing, and a group of damping columns are arranged in the lower end cover. According to the centrifugal machine motor structure, the structure is optimized, the structural stability is improved, meanwhile, the vibration in the working process can be effectively relieved through the arrangement of the damping columns, the operation stability of the centrifugal machine motor structure is further improved, the damage problem caused by vibration of the motor can be effectively relieved, the service life of the centrifugal machine motor structure is prolonged, and the service life of the centrifugal machine motor structure is prolonged. And the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of centrifuges, and in particular relates to a centrifuge motor structure. Background Art

[0002] A centrifuge is a device that uses centrifugal force to separate liquids from solid particles or components in a liquid-liquid mixture. It is widely used in clinical medicine, biochemistry, genetic engineering, immunology, and other fields, and is an essential instrument for centrifugal separation in hospitals, research institutes, and universities. The centrifuge operates by rotating the rotor and its accessories at high speed within its inner chamber, driven by a motor. The vibration of the entire centrifuge is its most important overall performance indicator, and the motor, as the driving component, has the most direct impact on the vibration of the entire centrifuge.

[0003] The existing centrifuge has a lower end cover with a bearing area of ​​180 mm and a thickness of 8 mm. Its bearing area is small and the thin thickness causes it to vibrate greatly during operation, affecting the stability of its motor operation. At the same time, the existing motor shaft diameter is generally 20 mm and the length is 81 mm. The load and the bearing are far apart, which also affects the stability of the load operation. After long-term use, the service life of the motor is seriously affected and the maintenance cost of the motor is increased. Therefore, the existing centrifuge motor needs to be improved. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a centrifuge motor structure with a simple structure, reasonable design, and easy production. By optimizing the structure, the stability of the motor mechanism operation is effectively improved.

[0005] Technical solution: In order to achieve the above-mentioned purpose, the present invention provides a centrifuge motor structure, comprising: a lower end cover, a stator assembly, an upper end cover and a motor shaft, wherein the stator assembly is arranged on the lower end cover, and a rotor assembly is arranged inside the stator assembly, the upper end cover is arranged above the stator assembly and is fixedly connected to the stator assembly, the lower portion of the motor shaft is connected to the lower end cover via a first bearing, the upper portion passes through the rotor assembly and the upper end cover in sequence, and its upper portion is connected to the upper end cover via a second bearing, and a group of shock-absorbing columns are provided in the lower end cover. The centrifuge motor structure described in the present invention improves its structural stability by optimizing its structure, and the provision of shock-absorbing columns can effectively reduce vibrations during operation, further improve its operational stability, effectively alleviate the problem of motor damage caused by vibration, extend its service life, and reduce its maintenance cost.

[0006] The lower end cover includes a first lower end cover and a second lower end cover. The first lower end cover is an annular end cover. The second lower end cover is located below the first lower end cover and is connected by an end cover connecting block. The first lower end cover is provided with a set of mounting holes. The lower end cover adopts a unique structural design, which increases its bearing area and makes the motor rotation more stable. At the same time,

[0007] Furthermore, grooves are provided at intervals on the outer side of the second lower end cover, gaps are provided between adjacent end cover connecting blocks, and the gaps match the grooves, and the shock-absorbing columns are provided in the gaps.

[0008] Furthermore, the upper end cover includes an upper end cover body, a boss is provided on the inner side of the upper end cover body, a flange is provided on the outer side of the upper end cover body, and connecting blocks are distributed circumferentially on the outer side of the upper end cover body.

[0009] Furthermore, the stator assembly includes a stator body, which has an inner boss inside and an outer boss outside. Windings are provided on the upper and lower end surfaces of the inner boss, respectively. The inner boss mates with the rotor assembly, while the upper and lower end surfaces of the outer boss mate with the upper and lower end covers, respectively. The outer boss is a two-stage boss.

[0010] Preferably, the inner diameter and outer diameter of the end cover connecting block are the same as the inner diameter and outer diameter of the first lower end cover, and the outer diameter of the second lower end cover is smaller than the outer diameter of the first lower end cover.

[0011] Further preferably, the cross-sectional diameter of the first lower end cover is 200-210 mm, the thickness of the lower end cover is 10-12 mm, the diameter of the motor shaft is >20 mm, and the length is 68-72 mm. Compared with the existing lower end cover, the diameter of the lower end cover is increased, which increases the bearing area and makes the motor rotation more stable. The thickness of the lower end cover is thickened, which not only increases the stability but also plays a certain shock-absorbing role. The thickening of the motor shaft reduces the deformation of the motor shaft during operation and also reduces the vibration during operation. The shortening of the motor shaft reduces the height of the load on the motor shaft, that is, lowers the center of gravity of the load, and the corresponding stability is higher.

[0012] Furthermore, a sealing structure is provided at the connection between the motor shaft and the upper end cover, which can improve the tightness of the connection between the motor shaft and the upper end cover.

[0013] In addition, the upper end cover is provided with a set of support columns, and the upper end cover is also provided with a wiring groove. The provision of the wiring groove can effectively solve the problem of disordered wiring.

[0014] The upper part of the motor shaft in the utility model is provided with a load.

[0015] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0016] 1. The centrifuge motor structure described in the utility model optimizes its structure and improves its structural stability. At the same time, the provision of shock-absorbing columns can effectively reduce vibration during operation, further improve its operational stability, effectively alleviate the problem of damage to the motor caused by vibration, extend its service life, and reduce its maintenance cost.

[0017] 2. Compared to existing lower end caps, the diameter of the lower end cap in this utility model is increased, increasing the load-bearing area and ensuring more stable motor rotation. The thicker lower end cap not only increases stability but also provides a certain degree of shock absorption. The thicker motor shaft reduces deformation and vibration during operation. The shorter motor shaft reduces the height of the load on the motor shaft, thereby lowering the load's center of gravity and resulting in greater stability.

[0018] 3. The lower end cover of the utility model adopts a unique structural design, which increases its bearing area and makes the motor rotation more stable.

[0019] 4. The connection between the motor shaft and the upper end cover of the present invention is provided with a sealing structure. The provision of the sealing structure can improve the tightness of the connection between the motor shaft and the upper end cover.

[0020] 5. The upper end cover of the present invention is also provided with a wiring groove, which can effectively solve the problem of disordered wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of the centrifuge motor structure described in the utility model;

[0022] Figure 2 This is an internal cross-sectional view of the centrifuge motor structure in the utility model;

[0023] Figure 3 This is a schematic structural diagram of the lower end cover of the utility model;

[0024] Figure 4 This is a schematic structural diagram of the upper end cover of the utility model;

[0025] Figure 5 This is a schematic diagram of the interior of the upper end cover of the utility model;

[0026] Figure 6 This is a schematic structural diagram of the stator assembly in the present utility model;

[0027] Figure 7 This is a schematic diagram of the structure of the load installation in the utility model;

[0028] In the figure: lower end cover 1, stator assembly 2, upper end cover 3, motor shaft 4, rotor assembly 5, first bearing 6, second bearing 7, load 8, first lower end cover 11, second lower end cover 12, end cover connecting block 13, shock absorber column 14, upper end cover body 31, boss 32, flange 33, connecting block 34, inner boss 21, outer boss 22, sealing structure 9, support column 10, wiring groove 301. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Example

[0030] like Figures 1 to 6 The centrifuge motor structure shown includes: a lower end cover 1, a stator assembly 2, an upper end cover 3 and a motor shaft 4. The stator assembly 2 is arranged on the lower end cover 1, and a rotor assembly 5 is provided inside the stator assembly 2. The upper end cover 3 is arranged above the stator assembly 2 and is fixedly connected to the stator assembly 2. The lower part of the motor shaft 4 is connected to the lower end cover 1 through a first bearing 6, and the upper part passes through the rotor assembly 5 and the upper end cover 3 in sequence, and its upper part is connected to the upper end cover 3 through a second bearing 7. A group of shock-absorbing columns 101 are provided in the lower end cover 1.

[0031] like Figure 3 The lower end cover 1 shown includes a first lower end cover 11 and a second lower end cover 12. The first lower end cover 11 is an annular end cover. The second lower end cover 12 is arranged below the first lower end cover 11, and the two are connected by an end cover connecting block 13. A group of mounting holes are provided on the first lower end cover 11.

[0032] Grooves are provided at intervals on the outer sides of the second lower end covers 12 , and gaps are provided between adjacent end cover connecting blocks 13 , and the gaps match the grooves, and the shock absorbing columns 101 are provided in the gaps.

[0033] like Figure 4 、 5 The upper end cap 3 shown includes an upper end cap body 31, which has a boss 32 on its inner side and a flange 33 on its outer side. Connecting blocks 34 are distributed circumferentially around the outer side of the upper end cap body 31. It should be noted that the structure and shape of the connecting blocks 34 can be adjusted as needed. The structure of the upper end cap 3 can be adjusted as needed to meet installation requirements.

[0034] like Figure 6 The stator assembly 2 shown includes a stator body, an inner boss 21 is provided inside the stator body, and an outer boss 22 is provided outside the stator body. The upper and lower end faces of the inner boss 21 are respectively provided with windings, and the inner boss 21 cooperates with the rotor assembly 5, and the upper and lower end faces of the outer boss 22 cooperate with the upper end cover 3 and the lower end cover 1 respectively.

[0035] like Figure 3 The inner diameter and outer diameter of the end cover connecting block 13 are the same as the inner diameter and outer diameter of the first lower end cover 11 , and the outer diameter of the second lower end cover 12 is smaller than the outer diameter of the first lower end cover 11 .

[0036] like Figure 6 The outer boss 22 shown is a two-stage boss.

[0037] like Figure 1 、 2 As shown, a sealing structure 9 is provided at the connection between the motor shaft 4 and the upper end cover 3 .

[0038] like Figure 1 、 2 4 , a group of support columns 10 are provided on the upper end cover 3 , and a group of support columns 10 are provided on the upper end cover 3 , and a wiring groove 301 is also provided on the upper end cover 3 .

[0039] Example 2

[0040] The centrifuge motor structure described in this embodiment is the same as that in Example 1.

[0041] In addition, Figure 4 The top of the upper end cover 3 is shown as a step-like structure, with a first, second, and third bosses arranged from bottom to top. The wiring trough 301 extends from the second boss to the first boss. The second bearing 7 is located within the third boss of the upper end cover 3, optimizing the bearing's installation position and placing it closer to the load. This ensures more stable rotation of the load and, consequently, more stable operation of the entire machine.

[0042] Preferably, the cross-sectional diameter of the first lower end cover 11 is 200-210 mm, the thickness of the lower end cover is 10-12 mm, the diameter of the motor shaft 4 is greater than 20 mm, and the length is 68-72 mm. The enlarged diameter of the lower end cover increases the bearing area, making the motor rotation more stable. The thickened lower end cover not only increases stability but also plays a certain shock-absorbing role. The thickened motor shaft reduces the deformation of the motor shaft during operation and also reduces vibration during operation. The shortened motor shaft reduces the height of the load on the motor shaft, that is, lowers the center of gravity of the load, and the corresponding stability is higher.

[0043] like Figure 6 A load 8 is provided on the upper portion of the motor shaft 4 .

[0044] The working principle of a centrifuge motor structure described in this embodiment is as follows: During operation, the motor drives the rotor assembly 5 to rotate, and the rotation of the rotor assembly 5 drives the motor shaft 4 to rotate together, and the rotation of the motor shaft 4 drives the load 8 to rotate. During operation, the shock-absorbing column 301 can reduce the vibration of the motor.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principles of the present invention. These improvements should also be regarded as within the scope of protection of the present invention.

Claims

1. A centrifuge motor structure, characterized in that: include: A lower end cover (1), a stator assembly (2), an upper end cover (3) and a motor shaft (4), wherein the stator assembly (2) is arranged on the lower end cover (1), and a rotor assembly (5) is provided inside the stator assembly (2), the upper end cover (3) is arranged above the stator assembly (2) and is fixedly connected to the stator assembly (2), the lower part of the motor shaft (4) is connected to the lower end cover (1) through a first bearing (6), the upper part passes through the rotor assembly (5) and the upper end cover (3) in sequence, and the upper part is connected to the upper end cover (3) through a second bearing (7), and a group of shock-absorbing columns (101) are provided in the lower end cover (1).

2. The centrifuge motor structure according to claim 1, characterized in that: The lower end cover (1) comprises a first lower end cover (11) and a second lower end cover (12), wherein the first lower end cover (11) is an annular end cover, and the second lower end cover (12) is arranged below the first lower end cover (11), and the two are connected via an end cover connecting block (13), and a group of mounting holes is provided on the first lower end cover (11).

3. The centrifuge motor structure according to claim 2, characterized in that: Grooves are provided at intervals on the outer sides of the second lower end cover (12), gaps are provided between adjacent end cover connecting blocks (13), and the gaps match the grooves, and the shock absorbing columns (101) are provided in the gaps.

4. The centrifuge motor structure according to claim 1, characterized in that: The upper end cover (3) comprises an upper end cover body (31), a boss (32) is provided on the inner side of the upper end cover body (31), a flange (33) is provided on the outer side, and connecting blocks (34) are distributed circumferentially on the outer side of the upper end cover body (31).

5. The centrifuge motor structure according to claim 1, characterized in that: The stator assembly (2) includes a stator body, an inner boss (21) is provided inside the stator body, and an outer boss (22) is provided outside the stator body, the upper and lower end surfaces of the inner boss (21) are respectively provided with windings, and the inner boss (21) is matched with the rotor assembly (5), and the upper and lower end surfaces of the outer boss (22) are respectively matched with the upper end cover (3) and the lower end cover (1), and the outer boss (22) adopts a two-stage boss.

6. The centrifuge motor structure according to claim 2, characterized in that: The inner diameter and outer diameter of the end cover connecting block (13) are the same as the inner diameter and outer diameter of the first lower end cover (11), and the outer diameter of the second lower end cover (12) is smaller than the outer diameter of the first lower end cover (11).

7. The centrifuge motor structure according to claim 2, characterized in that: The cross-sectional diameter of the first lower end cover (11) is 200-210 mm, the thickness of the lower end cover (1) is 10-12 mm, the diameter of the motor shaft (4) is greater than 20 mm, and the length is 68-72 mm.

8. The centrifuge motor structure according to claim 1, characterized in that: A sealing structure (9) is provided at the connection between the motor shaft (4) and the upper end cover (3).

9. The centrifuge motor structure according to claim 1, characterized in that: A group of support columns (10) are provided on the upper end cover (3), and a wiring groove (301) is also provided on the upper end cover (3).

10. The centrifuge motor structure according to claim 9, characterized in that: The top of the upper end cover (3) is stepped, and is provided with a first boss, a second boss, and a third boss in sequence from bottom to top. A wiring groove (301) is provided on the outside of the second boss, and the wiring groove (301) extends from the second boss to the first boss.

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