Lower shaft head with multi-path sealing protection structure

Abstract

The utility model discloses a lower shaft head with a multi-path sealing protection structure, which comprises a lower shaft head, a shaft sleeve is coaxially arranged in the lower shaft head, a connecting shaft is mounted in the shaft sleeve, a movable ring seat is mounted at the top end of the lower shaft head, a push ring and a movable ring are sequentially arranged in the movable ring seat from top to bottom, and the push ring is connected with the movable ring seat through a spring. A static ring is fixedly installed at the top of the shaft sleeve, the movable ring and the static ring are located in the same vertical plane, and a closed space defined by the lower shaft head, the movable ring base, the shaft sleeve, the movable ring and the static ring is a cooling lubricating oil cavity. First sealing rings are arranged between the static ring and the shaft sleeve and between the movable ring and the shaft sleeve; second sealing rings are arranged between the static ring and the lower shaft head and between the movable ring and the movable ring seat; a first oil seal is installed in the movable ring seat, and a second oil seal is installed in the bottom of the lower shaft head. By means of the sealing protection structure, sludge accumulation in the lower shaft head is effectively avoided, it is guaranteed that cooling lubricating oil can conduct lubrication protection, abrasion of the lower shaft head is delayed, and the service life of the lower shaft head is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of grinding equipment, relates to parts of grinding equipment, and particularly relates to a lower shaft head with a multi-channel sealing protection structure. Background Art

[0002] The lower shaft head, as a key component in mechanical equipment, is mainly used for supporting and transmitting power. In the grinding process section of a concentrator, a grinding screw classifier needs to be used. After the sealing structure of the lower shaft head of the grinding screw classifier fails, it needs to be replaced in time to ensure the smooth progress of the operation. However, the existing technology has a fast failure rate and a short service life, requires frequent replacement, delays the grinding time, and reduces the operation efficiency.

[0003] The main reasons for the failure of the lower shaft head are as follows: When the grinding screw classifier is working, a large amount of sludge-like substances will enter the lower shaft head. These sludge-like substances not only exist in the gaps of the bearings, but may also penetrate between various components of the bearings, resulting in the failure of the normal lubrication mechanism of the bearings. The lubricating oil or grease that should originally play a role in lubrication and reducing friction is replaced by these sludge-like substances and cannot play its due role. When the lubrication of the bearings fails, friction and wear will increase sharply. When various components of the bearings rotate at high speed or bear heavy loads, due to the lack of effective lubrication protection, wear and deformation will occur rapidly. This wear and deformation will not only reduce the performance and life of the bearings, but is more likely to cause the bearings to jam, paralyzing the entire transmission system. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a lower shaft head with a multi-channel sealing protection structure, and solve the technical problem that sludge-like substances are likely to accumulate in the lower shaft head of the existing grinding screw classifier, resulting in the easy failure of the lower shaft head.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions to achieve:

[0006] A lower shaft head with a multi-channel sealing protection structure, including a lower shaft head. An axle sleeve is coaxially arranged inside the lower shaft head, and a central through hole of the axle sleeve is used for installing a connecting shaft. A moving ring seat is fixedly installed on the top end of the lower shaft head. A push ring and a moving ring are sequentially arranged inside the moving ring seat from top to bottom. The top end of the push ring is connected to the bottom ends of a plurality of springs, and the top ends of the springs are fixedly connected to the inner wall of the top end of the moving ring seat. The bottom end of the push ring is fixedly connected to the top of the moving ring, and the bottom of the moving ring is fixedly connected to the axle sleeve. A stationary ring is fixedly installed on the top of the axle sleeve. The stationary ring is located below the top of the axle sleeve, the moving ring is located above the top of the axle sleeve, and the moving ring and the stationary ring are in the same vertical plane. The enclosed space formed by the lower shaft head, the moving ring seat, the axle sleeve, the moving ring and the stationary ring is a cooling lubricating oil cavity, and the cooling lubricating oil cavity is used for containing cooling lubricating oil.

[0007] A first sealing ring is hermetically installed in the gap between the connection end of the stationary ring and the axle sleeve, and a first sealing ring is hermetically installed in the gap between the connection end of the moving ring and the axle sleeve. A second sealing ring is hermetically installed between the connection end of the stationary ring and the lower shaft head, and a second sealing ring is hermetically installed in the gap between the connection end of the moving ring and the moving ring seat. The sealing structure composed of the stationary ring, the first sealing ring and the second sealing ring is used to seal the cooling lubricating oil cavity.

[0008] A first oil seal is installed inside the moving ring seat, and the first oil seal is located between the top end of the moving ring and the inner wall of the top end of the moving ring seat. The first oil seal is used to seal the moving ring seat. A plurality of second oil seals are installed inside the bottom of the lower shaft head, and the second oil seals are used to seal the lower shaft head.

[0009] The present utility model also has the following technical features:

[0010] A snap ring is fixedly installed inside the bottom of the lower shaft head, and the second oil seal is located between the stationary ring and the snap ring. A positioning plate is arranged below the snap ring, and the positioning plate is fixedly installed on the lower shaft head through a first hexagon socket head cap screw.

[0011] A positioning sleeve is sleeved outside the axle sleeve, the positioning sleeve is located below the positioning plate, and the positioning sleeve is fixedly installed outside the axle sleeve through a second hexagon socket head cap screw.

[0012] A spacer sleeve is fixedly installed inside the bottom of the lower shaft head, and a third sealing ring is hermetically installed in the gap between the spacer sleeve and the lower shaft head.

[0013] A fourth sealing ring is hermetically fitted on the inner walls of the top and bottom of the axle sleeve respectively.

[0014] A fifth sealing ring is hermetically installed in the gap between the connection end of the moving ring seat and the lower shaft head, and a sixth sealing ring is hermetically installed between the outer wall of the top end of the moving ring seat and the connection end of the lower shaft head.

[0015] The described moving ring seat is fixedly connected to the lower shaft head through the third hexagon socket head cap screw.

[0016] The described lower shaft head includes an integrally arranged upper half of the lower shaft head and a lower half of the lower shaft head. At the top of the upper half of the lower shaft head, a lower shaft head connecting portion is integrally arranged, and the lower shaft head connecting portion extends inwards along the radial direction; at the top of the upper half of the lower shaft head, a lower shaft head transition portion is integrally arranged, and the lower shaft head transition portion extends inwards along the radial direction and is integrally connected to the lower half of the lower shaft head.

[0017] The described shaft sleeve includes a shaft sleeve body. At the top of the shaft sleeve body, a shaft sleeve mounting ring is integrally arranged. At the outer edge of the shaft sleeve mounting ring, a shaft sleeve mounting platform is integrally arranged. The shaft sleeve mounting platform is arranged along the axial direction, and the shaft sleeve mounting platform is located in the cooling lubricating oil cavity.

[0018] The described moving ring seat includes a moving ring seat body. The moving ring seat body is fixedly connected to the lower shaft head. In the middle of the moving ring seat body, a moving ring seat insertion portion is integrally arranged, and the moving ring seat insertion portion is coaxially inserted between the lower shaft head and the moving ring.

[0019] Compared with the prior art, the utility model has the following technical effects:

[0020] The utility model designs a four-way sealing protection structure. Among them, the first sealing protection structure is the first oil seal, and the second sealing protection structure consists of two second oil seals connected in series. The first oil seal and the second oil seal can prevent the penetration of silt. The third and fourth sealing protection structures are both mechanical sealing protection structures, which are jointly composed of a first sealing ring, a stationary ring and two groups of second sealing rings. When the cooling lubricating oil cavity is filled with oil, the two mechanical sealing protection structures can ensure that the oil in the cooling lubricating oil cavity will not leak during operation, so as to play the role of lubrication and cooling. Through the above four-way sealing protection structure, the accumulation of silt in the lower shaft head is effectively avoided, and the cooling lubricating oil can be lubricated and protected, thereby delaying the wear of the lower shaft head and extending the service life of the lower shaft head. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of the lower shaft head with a multi-way sealing protection structure.

[0022] Figure 2 It is a detailed view of the sealing protection structure.

[0023] Figure 3 It is a detailed view of the sealing protection structure (symmetric with Figure 2 ).

[0024] Figure 4 It is a schematic diagram of the structure of the stop lug seat.

[0025] Figure 5It is a schematic structural diagram of a lower shaft head, a shaft sleeve and a moving ring seat.

[0026] The meanings of the labels in the figure are as follows: 1 - lower shaft head, 2 - shaft sleeve, 3 - moving ring seat, 4 - push ring, 5 - moving ring, 6 - spring, 7 - stationary ring, 8 - cooling lubricating oil chamber, 9 - first sealing ring, 10 - second sealing ring, 11 - first oil seal, 12 - second oil seal, 13 - snap ring, 14 - positioning plate, 15 - first hexagon socket head cap screw, 16 - positioning sleeve, 17 - second hexagon socket head cap screw, 18 - spacer sleeve, 19 - third sealing ring, 20 - fourth sealing ring, 21 - fifth sealing ring, 22 - sixth sealing ring, 23 - third hexagon socket head cap screw, 24 - bearing seat, 25 - stop lug seat, 26 - pressing plate, 27 - connecting shaft.

[0027] 101 - upper half of the lower shaft head, 102 - lower half of the lower shaft head, 103 - connecting part of the lower shaft head, 104 - transition part of the lower shaft head.

[0028] 301 - main body of the moving ring seat, 302 - insertion part of the moving ring seat.

[0029] 201 - main body of the shaft sleeve, 202 - mounting ring of the shaft sleeve, 203 - mounting table of the shaft sleeve.

[0030] The following further elaborates on the specific content of the present utility model in conjunction with embodiments. Specific Embodiment

[0031] It should be noted that all the components and oil fluids in the present utility model, without special instructions, are the components and oil fluids known in the art. For example: the first sealing ring 9, the second sealing ring 10, the third sealing ring 19, the fourth sealing ring 20, the fifth sealing ring 21 and the sixth sealing ring 22 are all conventional O - type sealing rings known in the prior art. The cooling lubricating oil is the conventional lubricating oil known in the prior art.

[0032] The following provides specific embodiments of the present utility model. It should be noted that the present utility model is not limited to the following specific embodiments, and all equivalent transformations made on the basis of the technical solutions of this application fall within the protection scope of the present utility model.

[0033] Embodiment:

[0034] This embodiment provides a lower shaft head with a multi - path sealing protection structure, as Figures 1 to 3As shown in the figure, a bushing 2 is coaxially arranged inside the lower shaft head 1, and the central through hole of the bushing 2 is used for installing the connecting shaft 27; a moving ring seat 3 is fixedly installed on the top end of the lower shaft head 1. Inside the moving ring seat 3, a pushing ring 4 and a moving ring 5 are arranged in sequence from top to bottom. The top end of the pushing ring 4 is connected to the bottom ends of a plurality of springs 6, and the top ends of the springs 6 are fixedly connected to the inner wall of the top end of the moving ring seat 3. The bottom end of the pushing ring 4 is fixedly connected to the top of the moving ring 5, and the bottom of the moving ring 5 is fixedly connected to the bushing 2; a stationary ring 7 is fixedly installed on the top of the bushing 2. The stationary ring 7 is located below the top of the bushing 2, the moving ring 5 is located above the top of the bushing 2, and the moving ring 5 and the stationary ring 7 are located in the same vertical plane; the enclosed space formed by the lower shaft head 1, the moving ring seat 3, the bushing 2, the moving ring 5 and the stationary ring 7 is a cooling lubricating oil chamber 8, and the cooling lubricating oil chamber 8 is used for containing cooling lubricating oil.

[0035] As Figures 1 to 3 shown, a first sealing ring 9 is hermetically installed in the gap at the connection end of the moving ring 5 and the bushing 2, and a first sealing ring 9 is hermetically installed in the gap at the connection end of the stationary ring 7 and the bushing 2; a second sealing ring 10 is hermetically installed in the gap at the connection end of the moving ring 5 and the moving ring seat 3, and a second sealing ring 10 is hermetically installed between the connection end of the stationary ring 7 and the lower shaft head 1; the sealing structure jointly formed by the moving ring 5, the stationary ring 7, the first sealing ring 9 and the second sealing ring 10 is used for sealing the cooling lubricating oil chamber 8.

[0036] As Figures 1 to 3 shown, a first oil seal 11 is installed inside the moving ring seat 3, and the first oil seal 11 is located between the top end of the moving ring 5 and the inner wall of the top end of the moving ring seat 3. The first oil seal 11 is used for sealing the moving ring seat 3; a plurality of second oil seals 12 are installed inside the bottom of the lower shaft head 1, and the second oil seals 12 are used for sealing the lower shaft head 1.

[0037] In this embodiment, both the moving ring 5 and the stationary ring 7 can rotate. The moving ring 5 bears the pressure of the oil in the cooling lubricating oil chamber 8, and the sealing structure jointly formed by the stationary ring 7, the first sealing ring 9 and the second sealing ring 10 can prevent the oil in the cooling oil chamber 8 from leaking. As the spring 6 expands and contracts, the pushing ring 4 and the moving ring 5 can move axially as a whole, which ensures that the moving ring 5, the bushing installation ring 202 and the stationary ring 7 are always in close contact axially to ensure good sealing.

[0038] As a specific scheme of this embodiment, as Figures 1 to 3 shown, a snap ring 13 is fixedly installed inside the bottom of the lower shaft head 1, and the second oil seal 12 is located between the stationary ring 7 and the snap ring 13; a positioning plate 14 is arranged below the snap ring 13, and the positioning plate 14 is fixedly installed on the lower shaft head 1 through the first hexagon socket head cap screw 15. In this embodiment, the snap ring 13 and the positioning plate 14 are used to close the bottom end of the lower shaft head 1.

[0039] As a specific scheme of this embodiment, asFigures 1 to 3 As shown, the outer sleeve of the sleeve 2 is provided with a positioning sleeve 16, which is located below the positioning plate 14 and is fixedly mounted on the outside of the sleeve 2 by a second hexagon socket screw 17. In this embodiment, the positioning sleeve 16 is used to ensure accurate and stable installation of components.

[0040] As a specific solution of this embodiment, Figures 1 to 3 As shown, a spacer sleeve 18 is fixedly installed in the bottom of the lower shaft head 1, and a third sealing ring 19 is sealed and installed in the gap between the spacer sleeve 18 and the lower shaft head 1. In this embodiment, the spacer sleeve 18 is conducive to ensuring that the parts are reduced in wear, and the third sealing ring 19 is used to achieve the sealed installation of the spacer sleeve 18 and the lower shaft head 1.

[0041] As a specific solution of this embodiment, Figures 1 to 3 As shown, a fourth sealing ring 20 is respectively sealed and embedded on the inner wall of the top and bottom of the sleeve 2. In this embodiment, the fourth sealing ring 20 is used to achieve the sealing installation of the connecting shaft 27 and the sleeve 2.

[0042] As a specific solution of this embodiment, Figures 1 to 3 As shown, a fifth sealing ring 21 is sealed in the gap between the dynamic ring seat 3 and the connection end of the lower shaft head 1, and a sixth sealing ring 22 is sealed between the outer wall at the top of the dynamic ring seat 3 and the connection end of the lower shaft head 1. In this embodiment, the fifth sealing ring 21 and the sixth sealing ring 22 are used to achieve the sealed installation of the dynamic ring seat 3 and the lower shaft head 1.

[0043] As a specific solution of this embodiment, Figures 1 to 3 As shown, the dynamic ring seat 3 is fixedly connected to the lower shaft head 1 through a third hexagon socket screw 23.

[0044] As a specific solution of this embodiment, Figures 1 to 3 As shown, a highland barley paper pad is provided between the lower shaft head 1 and the connecting end of the bearing seat 24.

[0045] As a specific solution of this embodiment, Figure 1 and Figure 4 As shown, the top of the lower shaft head 1 is installed in the bearing seat 24; the bottom end of the sleeve 2 is in contact with the top end of the stop ear seat 25, and the bottom end of the stop ear seat 25 is fixedly installed with a pressure plate 26; the top of the connecting shaft 27 extends into the bearing seat 24 and is movably connected to the hollow shaft of the spiral part of the grinding spiral classifier; the bottom of the connecting shaft 27 extends into the stop ear seat 25 and is fixedly connected to the pressure plate 26.

[0046] In this embodiment, the bottom of the stop lug seat 25 is installed in the stop groove of the overflow weir of the grinding spiral classifier, and the top of the stop lug seat 25 is hinged to the connecting rod of the lifting adjustment part of the grinding spiral classifier, so that the grinding spiral classifier bears part of the weight of the grinding spiral classifier and adjusts the depth of the spiral blade in the pulp precipitation area.

[0047] As a specific solution of this embodiment, as Figure 5 shown, the lower shaft head 1 includes an integrally arranged upper half 101 of the lower shaft head and a lower half 102 of the lower shaft head. Both the upper half 101 of the lower shaft head and the lower half 102 of the lower shaft head are hollow cylindrical structures, and the inner diameter of the upper half 101 of the lower shaft head is larger than the inner diameter of the lower half 102 of the lower shaft head; a lower shaft head connecting portion 103 is integrally arranged at the top of the upper half 101 of the lower shaft head, and the lower shaft head connecting portion 103 extends inward along the radial direction; a lower shaft head transition portion 104 is integrally arranged at the top of the upper half 101 of the lower shaft head, and the lower shaft head transition portion 104 extends inward along the radial direction and is integrally connected to the lower half 102 of the lower shaft head.

[0048] As a specific solution of this embodiment, as Figure 5 shown, the shaft sleeve 2 includes a shaft sleeve main body 201. The shaft sleeve main body 201 is a hollow cylindrical structure. A shaft sleeve mounting ring 202 is integrally arranged at the top of the shaft sleeve main body 201. The main body of the shaft sleeve mounting ring 202 is a hollow flat cylindrical structure. A shaft sleeve mounting table 203 is integrally arranged on the outer edge of the shaft sleeve mounting ring 202. The shaft sleeve mounting table 203 is arranged along the axial direction, and the shaft sleeve mounting table 203 is located in the cooling lubricating oil chamber 8; the cross-sectional shape of the shaft sleeve mounting table 203 and the shaft sleeve mounting ring 202 is T-shaped. In this embodiment, the stationary ring 7 is arranged between the bottom of the shaft sleeve mounting table 203 and the shaft sleeve main body 201, the moving ring 5 is arranged between the top of the shaft sleeve mounting table 203 and the shaft sleeve main body 201, and the moving ring 5 and the stationary ring 7 are respectively located above and below the shaft sleeve mounting ring 202.

[0049] As a specific solution of this embodiment, as Figure 5 shown, the moving ring seat 3 includes a moving ring seat main body 301. The moving ring seat main body 301 is fixedly connected to the lower shaft head 1. A moving ring seat insertion portion 302 is integrally arranged in the middle of the moving ring seat main body 301. The moving ring seat insertion portion 302 is coaxially inserted between the lower shaft head 1 and the moving ring 5.

[0050] In this embodiment, the cooling lubricating oil chamber 8 is surrounded by the lower shaft head connecting portion 103, the lower half 102 of the lower shaft head, the lower shaft head transition portion 104, the moving ring seat insertion portion 302, the shaft sleeve mounting table 203, the moving ring 5 and the stationary ring 7.

[0051] The working process and principle of the present utility model are as follows:

[0052] First, install the present utility model on the grinding spiral classifier. When the grinding spiral classifier is working, the hollow shaft of the spiral part of the grinding spiral classifier drives the bearing seat 24, the moving ring seat 3, the lower shaft head 1, the moving ring 5 and the static ring 7 to rotate together, while the connecting shaft 27 does not rotate and remains stationary.

[0053] Second, during the working process, the first oil seal 11 and the second oil seal 12 can prevent the penetration of silt. The cooling lubricating oil cavity 8 is filled with oil, and the sealing structure composed of the moving ring 5, the first sealing ring 9 and the second sealing ring 10 can ensure that the oil will not leak during operation, thus fully playing the role of lubrication and cooling.

Claims

1. A lower shaft head with a multi-channel sealing protection structure, including a lower shaft head (1), wherein a bushing (2) is coaxially arranged inside the lower shaft head (1), and a central through hole of the bushing (2) is used for installing a connecting shaft (27); characterized in that: A moving ring seat (3) is fixedly installed on the top end of the lower shaft head (1). Inside the moving ring seat (3), a push ring (4) and a moving ring (5) are sequentially arranged from top to bottom. The top end of the push ring (4) is connected to the bottom ends of a plurality of springs (6), and the top ends of the springs (6) are fixedly connected to the inner wall of the top end of the moving ring seat (3). The bottom end of the push ring (4) is fixedly connected to the top of the moving ring (5), and the bottom of the moving ring (5) is fixedly connected to the bushing (2). A static ring (7) is fixedly installed at the top of the bushing (2). The static ring (7) is located below the top of the bushing (2), the moving ring (5) is located above the top of the bushing (2), and the moving ring (5) and the static ring (7) are located in the same vertical plane. The enclosed space formed by the lower shaft head (1), the moving ring seat (3), the bushing (2), the moving ring (5), and the static ring (7) is a cooling lubricating oil chamber (8), and the cooling lubricating oil chamber (8) is used for containing cooling lubricating oil; A first sealing ring (9) is hermetically installed in the gap between the connection end of the static ring (7) and the bushing (2), and a first sealing ring (9) is hermetically installed in the gap between the connection end of the moving ring (5) and the bushing (2). A second sealing ring (10) is hermetically installed between the connection end of the static ring (7) and the lower shaft head (1), and a second sealing ring (10) is hermetically installed in the gap between the connection end of the moving ring (5) and the moving ring seat (3). The sealing structure composed of the static ring (7), the first sealing ring (9), and the second sealing ring (10) is used for sealing the cooling lubricating oil chamber (8); A first oil seal (11) is installed inside the moving ring seat (3), and the first oil seal (11) is located between the top end of the moving ring (5) and the inner wall of the top end of the moving ring seat (3). The first oil seal (11) is used for sealing the moving ring seat (3). A plurality of second oil seals (12) are installed inside the bottom of the lower shaft head (1), and the second oil seals (12) are used for sealing the lower shaft head (1).

2. The lower shaft head with a multi-channel sealing protection structure according to claim 1, characterized in that, A snap ring (13) is fixedly installed inside the bottom of the lower shaft head (1), and the second oil seal (12) is located between the static ring (7) and the snap ring (13). A positioning plate (14) is arranged below the snap ring (13), and the positioning plate (14) is fixedly installed on the lower shaft head (1) through a first hexagon socket head cap screw (15).

3. The lower spindle nose with a multi-channel sealing protection structure as described in claim 1, wherein, A positioning sleeve (16) is sleeved outside the bushing (2), the positioning sleeve (16) is located below the positioning plate (14), and the positioning sleeve (16) is fixedly installed outside the bushing (2) through a second hexagon socket head cap screw (17).

4. The lower spindle nose with a multi-channel sealing protection structure as described in claim 1, wherein A spacer sleeve (18) is fixedly installed inside the bottom of the lower shaft head (1), and a third sealing ring (19) is hermetically installed in the gap between the spacer sleeve (18) and the lower shaft head (1).

5. The lower spindle nose with a multi-channel sealing protection structure according to claim 1, characterized in that A fourth sealing ring (20) is hermetically fitted on the inner walls of the top and bottom of the bushing (2) respectively.

6. The lower shaft head with a multi-channel sealing protection structure according to claim 1, characterized in that, A fifth sealing ring (21) is hermetically installed in the gap at the connection end between the moving ring seat (3) and the lower shaft head (1), and a sixth sealing ring (22) is hermetically installed between the outer wall at the top of the moving ring seat (3) and the connection end of the lower shaft head (1).

7. The lower spindle nose with a multi-channel sealing protection structure according to claim 1, characterized in that, The moving ring seat (3) is fixedly connected to the lower shaft head (1) by third internal hexagonal screws (23).

8. The lower spindle nose with a multi-channel sealing protection structure according to claim 1, characterized in that The lower shaft head (1) includes an integrally formed upper half of the lower shaft head (101) and a lower half of the lower shaft head (102). At the top of the upper half of the lower shaft head (101), a lower shaft head connection part (103) is integrally formed, and the lower shaft head connection part (103) extends inward along the radial direction; at the top of the upper half of the lower shaft head (101), a lower shaft head transition part (104) is integrally formed, and the lower shaft head transition part (104) extends inward along the radial direction and is integrally connected to the lower half of the lower shaft head (102).

9. The lower shaft head with a multi-channel sealing protection structure as described in claim 1, wherein The shaft sleeve (2) includes a shaft sleeve main body (201). At the top of the shaft sleeve main body (201), a shaft sleeve mounting ring (202) is integrally formed. At the outer edge of the shaft sleeve mounting ring (202), a shaft sleeve mounting platform (203) is integrally formed. The shaft sleeve mounting platform (203) is arranged along the axial direction, and the shaft sleeve mounting platform (203) is located in the cooling lubricating oil chamber (8).

10. The lower shaft head with a multi-channel sealing protection structure according to claim 1, characterized in that, The moving ring seat (3) includes a moving ring seat main body (301). The moving ring seat main body (301) is fixedly connected to the lower shaft head (1). In the middle of the moving ring seat main body (301), a moving ring seat insertion part (302) is integrally formed, and the moving ring seat insertion part (302) is coaxially inserted between the lower shaft head (1) and the moving ring (5).

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