Floating connection structure of powder vacuum dryer shaft body and device thereof

Abstract

The utility model discloses a floating connection structure of a shaft body of a powder vacuum drying machine and a device of the floating connection structure, and the floating connection structure comprises the shaft body, an air inflation sealing structure and a floating shaft sealing sleeve piece, and the air inflation sealing structure comprises a sealing ring and a sealing installation plate. The floating plate slides relative to the sealing ring, the connecting bolt is fixedly connected to the floating plate and extends out in the axial direction, the shaft body is sleeved with the inflatable sealing ring, and the connecting bolt is inserted into a pin hole in the sealing installation plate. The floating shaft sealing sleeve part is adopted, can adapt to the lengthening of the shaft body, has certain axial floating adaptability, and avoids the situation that the rotating shaft seal loses the sealing capacity due to the extension of the shaft body.

Description

Technical Field

[0001] This utility model relates to a transmission connection structure, and more specifically, it relates to a floating connection structure and device for the shaft of a powder vacuum dryer. Background Technology

[0002] A powder dryer is a device used to dry powders by heating. The dryer's shaft extends into the powder chamber to agitate the powder, ensuring even and thorough heating and separating moisture from the powder using high heat. The drive shaft extends into the device and drives the powder to rotate. Such equipment often requires a rotary shaft seal to seal the drive shaft and prevent powdery material from leaking out and causing contamination.

[0003] However, due to the high temperature inside the equipment, the drive shaft will also undergo deformations such as elongation. The axial load generated by the deformed drive shaft will be applied to the rotary shaft seal. The rotary shaft seal itself cannot withstand the axial load, and the sealing ring on the rotary shaft seal will be affected by the axial force, which will affect the sealing effect and lead to powder leakage.

[0004] This application aims to improve the transmission structure of the shaft for stirring and heating powder, as described above, to achieve a floating connection, thereby eliminating the influence of the axial load on the seal. Utility Model Content

[0005] This invention overcomes the shortcomings of existing rotary shaft seals directly mounted on the drive shaft, which fail under axial force at high temperatures. It provides a floating connection structure and device for the shaft of a powder vacuum dryer. Through improvements, it achieves a floating connection, thereby eliminating the influence of axial load on the seal.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A floating connection structure for the shaft of a powder vacuum dryer includes a shaft body, an inflatable sealing structure, and a floating shaft seal kit. The inflatable sealing structure includes a sealing ring and a sealing mounting plate. The floating shaft seal kit includes a floating plate that slides relative to the sealing ring and a connecting bolt that is fixedly connected to the floating plate and extends in the axial direction. The inflatable sealing ring is sleeved on the shaft body, and the connecting bolt is inserted into the pin hole on the sealing mounting plate.

[0008] The purpose of the radial floating and floating shaft seal structures described in this application is to form a seal with the equipment, preventing material from leaking out through the gap between the shaft and the equipment, thus avoiding contamination. The floating in this application includes radial and axial floating. Axial floating adapts to the axial deformation of the shaft body at high temperatures. During high temperatures and subsequent cooling, the shaft body undergoes axial elongation or shortening, and existing rotary shaft seals cannot withstand the axial force. Axial expansion and contraction of the shaft also leads to gaps between the aforementioned sealing ring and the equipment sidewall, resulting in material leakage.

[0009] This application achieves radial floating by inflating the sealing ring. It includes a floating plate connected to a rotary shaft seal, with outwardly extending connecting bolts on the floating plate. These bolts insert into pin holes in the sealing mounting plate, restricting the floating plate and rotary shaft seal from rotating with the shaft body. When the shaft body expands due to heat, the floating plate and rotary shaft seal correspondingly displace, achieving axial floating. Because the floating stroke adapts to the shaft's elongation, which is relatively small, the connecting bolts will not come out of the pin holes.

[0010] Preferably, the sealing ring is connected to an inflation tube. The sealing ring expands by being supplied with air through the inflation tube.

[0011] Preferably, the inflation tube is formed through an opening in the sealing mounting plate. The sealing mounting plate has an air tube interface at each end of the opening, one of which is connected to the sealing ring, and the other extends beyond the inflation mounting plate. The air supply system produced by this structure has the advantages of fewer components and a lower probability of leakage.

[0012] Preferably, the sealing mounting plate is installed on the equipment using fasteners. The equipment has an annular groove on its side wall, and the sealing mounting plate has a flange that inserts into the annular groove. The cooperation between the annular groove and the flange serves to pre-position the sealing mounting plate and the equipment side wall, facilitating subsequent fastener connection.

[0013] Preferably, the floating shaft seal kit also includes a rotary shaft seal and a floating shaft sleeve. The floating plate and the rotary shaft seal are fixedly connected. The floating shaft sleeve is fitted onto the shaft body and fixedly connected to the shaft body. The floating shaft sleeve has a sealing section, and the rotary shaft seal is fitted onto the sealing section and sealed to the sealing section. The rotary shaft seal is used to connect to the rotating shaft body to achieve a seal between the shaft body and the rotating shaft seal.

[0014] Preferably, the end of the floating bushing away from the pneumatic seal structure is provided with a bearing housing, on which a bearing is mounted. The outer ring of the bearing abuts against a bearing cap, which is fixedly connected to the rotating shaft seal by fasteners. The inner ring of the bearing is connected to the floating bushing, and the bearing is a deep groove ball bearing. The end of the floating bushing is provided with a threaded section, on which a limit nut is threadedly connected. The limit nut abuts against the inner ring of the bearing. This structure utilizes the bearing to bear the axial force, transferring the axial force originally located on the rotating shaft seal to the deep groove ball bearing, which can bear both axial and radial forces.

[0015] Preferably, the rotary shaft seal includes a clamp, which secures the rotary shaft seal to the floating shaft sleeve. Because the new floating shaft seal assembly can adapt to axial forces, the precise positioning of the clamp can be disregarded to a certain extent.

[0016] Preferably, a cover bushing is also fitted on the shaft body. The floating bushing is formed by the joining of two half bushings, and the two half bushings are fixedly connected by fasteners.

[0017] A powder vacuum drying device includes a frame and a floating connection structure for the shaft of a powder vacuum dryer as described above. The frame housing has a maintenance hole located directly below a cover bushing. By using a half-shoulder cover bushing, the size of the maintenance hole can be reduced, thereby improving the rigidity of the frame.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] (1) This application uses a floating shaft seal kit, which can adapt to the length of the shaft body and has a certain axial floating adaptability, thus avoiding the loss of sealing ability of the rotating shaft seal due to the elongation of the shaft body;

[0020] (2) This application uses an inflatable sealing ring, which floats radially by inflation to adapt to the extension of the shaft due to high temperature deformation and eliminate the resulting gap. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the present invention;

[0022] Figure 2 This is a cross-sectional schematic diagram of the inflatable sealing structure of this utility model;

[0023] Figure 3 This is a cross-sectional schematic diagram of the floating shaft seal kit of this utility model;

[0024] Figure 4 This is a schematic diagram of the cover bushing of this utility model;

[0025] Figure 5 This is an exploded view of the rotary shaft seal of this utility model;

[0026] In the figure:

[0027] Shaft body 1, sealing ring 2, sealing mounting plate 3, inflatable air pipe 4, air pipe interface 5, annular groove 6, flange 7, floating plate 8, connecting bolt 9, rotary shaft seal 10, floating bushing 11, sealing section 12, bearing 13, bearing gland 14, limit nut 15, threaded section 16, covering bushing 17, half bushing 18, housing 19, connecting sleeve 20, mounting flange 21, end cover 22, clamp 23, dynamic ring 24, friction ring 25, equipment side wall 26. Detailed implementation manners

[0028] The present disclosure will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] It should be noted that the following detailed descriptions are all exemplary and intended to provide further explanations for the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0030] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only relationship terms determined for the convenience of describing the structural relationship of each component or element of the present disclosure and do not specifically refer to any component or element of the present disclosure and should not be construed as a limitation to the present disclosure.

[0032] In the present disclosure, terms such as "fixed connection", "connected", "connected to" should be understood in a broad sense, indicating that it can be a fixed connection, an integral connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate medium. For those related scientific research or technical personnel in this field, the specific meaning of the above terms in the present disclosure can be determined according to specific circumstances and should not be construed as a limitation to the present disclosure.

[0033] Embodiment:

[0034] Refer Figure 1 As shown, a floating connection structure of a shaft body of a powder vacuum dryer includes a shaft body 1, an inflatable sealing structure and a floating shaft seal kit.

[0035] Refer Figure 2 As shown, the inflatable sealing structure includes a sealing ring 2 and a sealing mounting plate 3. The sealing ring 2 is connected to an inflatable air pipe 4. The sealing ring 2 is inflated by supplying air through the inflatable air pipe 4. The inflatable air pipe 4 is formed through an opening in the sealing mounting plate 3. At both ends of the opening, the sealing mounting plate 3 is respectively provided with an air pipe interface 5. One air pipe interface 5 is connected to the sealing ring 2, and the other air pipe interface 5 extends outside the inflatable mounting plate. In some other embodiments, a plastic or flexible pipe body is further provided inside the opening, and both ends of the pipe body are connected to the air pipe interface 5. The air supply system produced by this structure has the advantages of fewer components and a lower probability of air leakage. The sealing mounting plate 3 is installed on the equipment through fasteners. A ring groove 6 is provided on the side wall 26 of the equipment, and the sealing mounting plate 3 is provided with a flange 7. The flange 7 is inserted into the ring groove 6. The cooperation between the ring groove 6 and the flange 7 plays a role in pre-positioning the sealing mounting plate 3 and the side wall 26 of the equipment, facilitating subsequent fastener connection.

[0036] Refer to Figure 3 As shown, the floating shaft seal kit includes a floating plate 8 that slides relative to the sealing ring 2, a connecting bolt 9 fixedly connected to the floating plate 8 and extending axially, a rotary shaft seal 10, and a floating shaft sleeve 11. The inflatable sealing ring 2 is sleeved on the shaft body 1, and the connecting bolt 9 is inserted into the pin hole on the sealing mounting plate 3. The floating plate 8 and the rotary shaft seal 10 are fixedly connected. The floating shaft sleeve 11 is sleeved on the shaft body 1 and fixedly connected to the shaft body 1. The floating shaft sleeve 11 is provided with a sealing section 12, and the rotary shaft seal 10 is sleeved on the sealing section 12 and is sealingly connected to the sealing section 12. The rotary shaft seal 10 is used to connect to the rotating shaft body 1 to achieve sealing between the rotary shaft seal 10 and the shaft body 1. One end of the floating shaft sleeve 11 away from the inflatable sealing structure is provided with a bearing 13 seat. A bearing 13 is installed in the bearing 13 seat. The outer ring of the bearing 13 abuts against a bearing gland 14. The bearing gland 14 is fixedly connected to the rotary shaft seal 10 through fasteners. The inner ring of the bearing 13 is connected to the floating shaft sleeve 11. The bearing 13 is a deep groove ball bearing 13. The end of the floating shaft sleeve 11 is provided with a threaded section 16, and a limit nut 15 is threadedly connected to the threaded section 16. The limit nut 15 abuts against the inner ring of the bearing 13. This structure uses the bearing 13 to bear the axial force, transferring the axial force originally configured on the rotary shaft seal 10 to the deep groove ball bearing 13 that can bear both axial force and radial force.

[0037] Refer to Figure 5 As shown, the rotary shaft seal 10 includes a clamp 23. The rotary shaft seal 10 is clamped on the floating shaft sleeve 11 through the clamp 23. Since the new floating shaft seal kit can adapt to the action of axial force, the precise positioning of the clamp 23 can be ignored within a certain range. The rotary shaft seal 10 includes a housing formed by a mounting flange 21 and an end cover 22, and a functional structure provided inside the housing. Along the center to both ends, the functional structure includes a connecting sleeve 20, a clamp 23 located inside the inner ring of the connecting sleeve 20, a dynamic ring 24, and a friction ring 25.

[0038] A covering bushing 17 is also sleeved on the shaft body 1. The floating bushing 11 is formed by combining two half bushings 18, and the two half bushings 18 are fixedly connected by fasteners.

[0039] See Figure 1 and Figure 4 As shown, a powder vacuum drying device includes a frame and a floating connection structure of a powder vacuum dryer shaft body as described above. The frame includes a connecting plate disposed outside the floating connection structure and a detachable housing 19. Among them, the housing 19 is located at the position corresponding to the covering bushing 17. A maintenance hole is provided on the housing 19 of the frame, and the maintenance hole is directly below the covering bushing 17. By providing the covering bushing 17 in the form of a half bushing 18, the size of the maintenance hole can be reduced, so that the frame has better rigidity. During maintenance, first remove the covering bushing 17, and then pull out the floating shaft seal kit to the position corresponding to the housing 19, and maintenance can be carried out through the maintenance hole.

[0040] The purpose of setting the radial floating and floating shaft seal structures in the structure of the present application is to form a seal with the equipment to prevent the materials in the equipment from overflowing outward through the gap between the shaft and the equipment, causing pollution. The floating in the present application includes radial floating and axial floating. The axial floating adapts to the axial deformation of the shaft body at high temperatures. During high temperature and subsequent cooling processes, the shaft body 1 undergoes axial elongation or shortening, and the existing rotary shaft seal 10 cannot withstand the axial force. The axially telescoping shaft will also cause a gap to form between the aforementioned sealing ring 2 and the side wall 26 of the equipment, resulting in material leakage.

[0041] In the present application, radial floating is achieved by inflating the sealing ring 2. A floating plate 8 connected to the rotary shaft seal 10 is provided in the present application. Connecting bolts 9 extending outward are provided on the floating plate 8. The connecting bolts 9 extend into the pin holes of the seal mounting plate 3 to restrict the floating plate 8 and the rotary shaft seal 10 from rotating with the shaft body 1. When the shaft body 1 is heated and elongated, the floating plate 8 and the rotary shaft seal 10 generate corresponding displacements to achieve axial floating. Since the floating stroke adapts to the elongation length of the shaft, which is relatively small, the connecting bolts 9 will not come out of the pin holes.

[0042] The above-described embodiments are only preferred solutions of the present utility model, and do not impose any form of limitation on the present utility model. There are other variations and modifications without exceeding the technical solutions described in the claims.

Claims

1. A floating connection structure for the shaft of a powder vacuum dryer, characterized in that, It includes a shaft body, an inflatable sealing structure, and a floating shaft seal kit. The inflatable sealing structure includes a sealing ring and a sealing mounting plate. The floating shaft seal kit includes a floating plate that slides relative to the sealing ring and a connecting bolt that is fixedly connected to the floating plate and extends in the axial direction. The inflatable sealing ring is fitted onto the shaft body, and the connecting bolt is inserted into the pin hole on the sealing mounting plate.

2. The floating connection structure of the shaft of a powder vacuum dryer according to claim 1, characterized in that, The sealing ring is connected to an inflation tube.

3. The floating connection structure of the shaft of a powder vacuum dryer according to claim 2, characterized in that, The inflation tube is formed through an opening on the sealing mounting plate. The sealing mounting plate has an air tube interface at both ends of the opening. One air tube interface is connected to the sealing ring, and the other air tube interface extends beyond the inflation mounting plate.

4. The floating connection structure of the shaft of a powder vacuum dryer according to claim 1, characterized in that, The sealing mounting plate is installed on the equipment by fasteners. The equipment has an annular groove on its side wall and the sealing mounting plate has a flange that is inserted into the annular groove.

5. The floating connection structure of the shaft of a powder vacuum dryer according to claim 1, characterized in that, The floating shaft seal kit also includes a rotary shaft seal and a floating shaft sleeve. The floating plate and the rotary shaft seal are fixedly connected. The floating shaft sleeve is fitted onto the shaft body and fixedly connected to the shaft body. The floating shaft sleeve has a sealing section. The rotary shaft seal is fitted onto the sealing section and sealed to the sealing section.

6. The floating connection structure of the shaft of a powder vacuum dryer according to claim 5, characterized in that, The floating bushing has a bearing housing at the end away from the pneumatic sealing structure. The bearing housing is equipped with a bearing, and the outer ring of the bearing abuts against a bearing cover. The bearing cover is fixedly connected to the rotating shaft seal by fasteners. The inner ring of the bearing is connected to the floating bushing. The bearing is a deep groove ball bearing. The end of the floating bushing has a threaded section, and a limit nut is threadedly connected to the threaded section. The limit nut abuts against the inner ring of the bearing.

7. The floating connection structure of the shaft of a powder vacuum dryer according to claim 5, characterized in that, The rotary shaft seal includes a clamp, and the rotary shaft seal is mounted on the floating shaft sleeve by the clamp.

8. The floating connection structure of the shaft of a powder vacuum dryer according to claim 1, characterized in that, The shaft body is also fitted with a cover bushing, and the floating bushing is formed by the two halves of the bushing coming together, and the two halves of the bushing are fixedly connected by fasteners.

9. A vacuum drying apparatus for powder, characterized in that, The invention includes a frame and a floating connection structure for the shaft of a powder vacuum dryer as described in any one of claims 1 to 8. The frame housing is provided with a maintenance hole located directly below the cover bushing.

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