Containerized Radial Double-End Split Mechanical Seal

Abstract

The present invention discloses a containerized radial double-end split mechanical seal, comprising: a shaft sleeve, a gland, a dynamic ring, an outer static ring and an inner static ring which are arranged with center split. The split parts of the shaft sleeve are assembled and sleeved on the main shaft. A dynamic ring groove is arranged at the bottom of the shaft sleeve. After the split parts of the dynamic ring are assembled, they are fixed in the dynamic ring groove. After the split parts of the outer static ring are assembled, they are hermetically connected to the dynamic ring. After the split parts of the inner static ring are assembled, they are also hermetically connected to the dynamic ring. An outer push ring is arranged at the top of the outer static ring, and an inner push ring is arranged at the top of the inner static ring. The split parts of the gland are assembled and sleeved on the shaft sleeve. There is a movable gap between the gland and the outer push ring and the inner push ring. A plurality of transmission parts and a plurality of elastic parts are arranged between the gland and the outer push ring and the inner push ring. The mechanical seal of the present invention has strong sealing effect and is convenient for disassembly and assembly.

Description

Technical Field

[0001] The present invention relates to a mechanical seal, and particularly to a split integrated radial double-end mechanical seal. Background Art

[0002] The main parts of traditional mechanical seals, such as the dynamic ring, static ring, gland, and shaft sleeve, are all closed circular rings. During the installation process, the mechanical seal set needs to be sleeved on the main shaft before other components can be installed on the main shaft. During the removal process, other components on the main shaft need to be removed first before the mechanical seal set can be sleeved on the main shaft. This disassembly and assembly work not only has cumbersome procedures, reducing production efficiency, but also requires staff to have extremely high precision installation capabilities. Summary of the Invention

[0003] The purpose of the present invention is to provide a split integrated radial double-end mechanical seal that is convenient for disassembly and assembly and has high sealing performance.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a split integrated radial double-end mechanical seal, including: a shaft sleeve, a gland, a dynamic ring, an outer static ring, and an inner static ring. The shaft sleeve, gland, dynamic ring, outer static ring, and inner static ring are all center split parts. The shaft sleeve split parts are assembled and sleeved on the main shaft. A first sealing ring is provided between the shaft sleeve and the main shaft. A dynamic ring groove is provided at the bottom of the shaft sleeve. The dynamic ring split parts are assembled and fixed in the dynamic ring groove. A second sealing ring is provided between the outer side wall of the dynamic ring and the inner side wall of the dynamic ring groove. The outer static ring split parts are assembled and sealed to connect with the dynamic ring. The inner static ring split parts are also assembled and sealed to connect with the dynamic ring. An outer push ring is provided at the top of the outer static ring. An inner push ring is provided at the top of the inner static ring. The gland split parts are assembled and sleeved on the shaft sleeve. There is a clearance for movement between the gland and the outer push ring and the inner push ring. A number of transmission parts and a number of elastic parts are provided between the gland and the outer push ring and the inner push ring. Third sealing rings are provided between the gland and the outer side walls of the outer static ring and the inner static ring.

[0005] Further, for the above-mentioned split integrated radial double-end mechanical seal, the outer push ring and the inner push ring are both center split parts, and the outer push ring and the inner push ring have the same structure. Taking the outer push ring as an example: a number of stepped through holes and spring holes are evenly spaced along the circumference in the outer push ring. A transmission screw is inserted through each stepped through hole as a transmission part. The transmission screw extends upward out of the outer push ring and is threadedly connected to the gland. A spring is placed in each spring hole as an elastic part. The top of the spring abuts against the gland.

[0006] Further, for the above-mentioned integrated radial double-ended split mechanical seal, the connection structure between the dynamic ring and the dynamic ring groove is as follows: several cylindrical pins are evenly spaced along the circumference on the bottom wall of the dynamic ring groove, and several cylindrical holes are evenly spaced along the circumference at the bottom of the dynamic ring. After the dynamic ring is placed in the dynamic ring groove, each cylindrical pin in the dynamic ring groove extends into each cylindrical hole on the dynamic ring.

[0007] Further, for the above-mentioned integrated radial double-ended split mechanical seal, several T-shaped limit blocks are evenly spaced along the circumference between the gland and the shaft sleeve. Screws are provided on the upper section of the T-shaped limit blocks. After passing through the shaft sleeve, the screws are connected to the main shaft, and the lower section of the T-shaped limit blocks is fixedly connected to the gland through screws.

[0008] Further, for the above-mentioned integrated radial double-ended split mechanical seal, several L-shaped limit blocks are evenly spaced along the circumference on the shoulder of the gland. Screws are provided on the L-shaped limit blocks. After passing through the gland, the screws are connected to the shaft sleeve.

[0009] Further, for the above-mentioned integrated radial double-ended split mechanical seal, a gland gasket is provided between the gland split parts. A corresponding first positioning pin and a first positioning hole are provided between the gland split parts, and the gland split parts are tightened and connected by screws.

[0010] Further, for the above-mentioned integrated radial double-ended split mechanical seal, a flat gasket is provided on the bottom wall of the gland.

[0011] Further, for the above-mentioned integrated radial double-ended split mechanical seal, a shaft sleeve gasket is provided between the shaft sleeve split parts. A corresponding second positioning pin and a second positioning hole are provided between the shaft sleeve split parts, and the shaft sleeve split parts are tightened and connected by screws.

[0012] The advantages of the present invention are as follows: Since the shaft sleeve, the gland, the dynamic ring, the outer static ring and the inner static ring all adopt a split structure, when installing and replacing the mechanical seal, it is not necessary to sleeve it from the end of the main shaft, which does not require removing other components on the main shaft, reducing the workload and improving the work efficiency. Moreover, when the split mechanical seal bears the medium pressure, the contact pressure between the dynamic ring and the outer static ring and the inner static ring increases with the increase of the pressure of the sealed medium, increasing the resistance of the sealed medium flowing out of the sealing surface. And the double static ring structure of the outer static ring and the inner static ring is used for sealing connection with the dynamic ring, further improving the sealing effect on the medium. Brief Description of the Drawings

[0013] Figure 1 is a schematic cross-sectional structure view of the integrated radial double-ended split mechanical seal described in the present invention. Detailed Description of the Invention

[0014] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.

[0015] As Figure 1 shown, the containerized radial double-end split mechanical seal of the present invention includes: a shaft sleeve 1, a gland 2, a dynamic ring 3, an outer static ring 4, and an inner static ring 5. The shaft sleeve 1, the gland 2, the dynamic ring 3, the outer static ring 4, and the inner static ring 5 are all center-split parts. The split parts of the shaft sleeve 1 are assembled and sleeved on the main shaft 10. A first sealing ring 11 is provided between the shaft sleeve 1 and the main shaft 10. A dynamic ring groove 12 is provided at the bottom of the shaft sleeve 1. The split parts of the dynamic ring 3 are assembled and fixed in the dynamic ring groove 12. The specific connection structure is as follows: a number of cylindrical pins 13 are evenly spaced along the circumference on the bottom wall of the dynamic ring groove 12, and a number of cylindrical holes 31 are evenly spaced along the circumference at the bottom of the dynamic ring 3. After the dynamic ring 3 is placed in the dynamic ring groove 12, the cylindrical pins 13 in the dynamic ring groove 12 respectively extend into the cylindrical holes 31 on the dynamic ring 3. A second sealing ring 32 is provided between the outer side wall of the dynamic ring 3 and the inner side wall of the dynamic ring groove 12. The split parts of the outer static ring 4 are assembled and sealed to the dynamic ring 3, and the split parts of the inner static ring 5 are also assembled and sealed to the dynamic ring 3. An outer push ring 6 is provided at the top of the outer static ring 4, and an inner push ring 7 is provided at the top of the inner static ring 5. The split parts of the gland 2 are assembled and sleeved on the shaft sleeve 1. There is a clearance between the gland 2 and the outer push ring 6 and the inner push ring 7. The outer push ring 6 and the inner push ring 7 are both center-split parts and have the same structure. Taking the outer push ring 6 as an example: a number of stepped through holes and spring holes are evenly spaced along the circumference in the outer push ring 6. A transmission screw 61 is inserted through each stepped through hole as a transmission member. The transmission screw 61 extends upward out of the outer push ring 6 and is threadedly connected to the gland 2. A spring 62 is placed in each spring hole as an elastic member. The top end of the spring 62 abuts against the gland 2. Third sealing rings 21 are provided between the gland 2 and the outer side walls of the outer static ring 4 and the inner static ring 5.

[0016] In this embodiment, a number of T-shaped limit blocks 8 are evenly spaced along the circumference between the gland 2 and the shaft sleeve 1. Screws are provided on the upper section of the T-shaped limit blocks 8. The screws pass through the shaft sleeve 1 and are connected to the main shaft 10. The lower section of the T-shaped limit block 78 is fixedly connected to the gland 2 by screws. A number of L-shaped limit blocks 9 are evenly spaced along the circumference on the shaft shoulder of the gland 2. Screws are provided on the L-shaped limit blocks 9. The screws pass through the gland 2 and are connected to the shaft sleeve 1.

[0017] In this embodiment, a corresponding first positioning pin 22 and a first positioning hole 23 are provided between the split parts of the gland 2. The split parts of the gland 2 are tightened and connected by screws. A gland gasket 24 is provided between the split parts of the gland 2. A flat gasket 25 is provided on the bottom wall of the gland 2.

[0018] In this embodiment, corresponding second positioning pins 14 and second positioning holes 15 are provided between the split parts of the shaft sleeve 1. The split parts of the shaft sleeve 2 are tightened and connected by screws, and a shaft sleeve gasket 16 is provided between the split parts of the shaft sleeve 1.

[0019] The advantages of the present invention are as follows: Since the shaft sleeve, gland, moving ring, outer static ring and inner static ring all adopt split structures, when installing and replacing the mechanical seal, it is not necessary to insert it from the end of the main shaft, which eliminates the need to remove other components on the main shaft, reduces the workload and improves the work efficiency. Moreover, when the split mechanical seal bears the medium pressure, the contact pressure between the moving ring and the outer static ring and the inner static ring increases with the increase of the pressure of the sealed medium, increasing the resistance of the sealed medium flowing out of the sealing surface. The double static ring structure of the outer static ring and the inner static ring is used for sealed connection with the moving ring, further improving the sealing effect on the medium.

Claims

1. Integrated radial double - end split mechanical seal, which is characterized in that: It includes: A shaft sleeve, a gland, a dynamic ring, an outer static ring and an inner static ring. The shaft sleeve, the gland, the dynamic ring, the outer static ring and the inner static ring are all center - split parts. The split parts of the shaft sleeve are assembled and sleeved on the main shaft. A first sealing ring is arranged between the shaft sleeve and the main shaft. A dynamic - ring groove is arranged at the bottom of the shaft sleeve. After the split parts of the dynamic ring are assembled, they are fixed in the dynamic - ring groove. A second sealing ring is arranged between the outer side wall of the dynamic ring and the inner side wall of the dynamic - ring groove. After the split parts of the outer static ring are assembled, they are sealingly connected to the dynamic ring. After the split parts of the inner static ring are assembled, they are also sealingly connected to the dynamic ring. An outer push ring is arranged at the top of the outer static ring, and an inner push ring is arranged at the top of the inner static ring. After the split parts of the gland are assembled, they are sleeved on the shaft sleeve. There is a clearance between the gland and the outer push ring and the inner push ring. A number of transmission parts and a number of elastic parts are arranged between the gland and the outer push ring and the inner push ring. Third sealing rings are arranged between the gland and the outer side walls of the outer static ring and the inner static ring; both the outer push ring and the inner push ring are center - split parts and have the same structure. Taking the outer push ring as an example: A number of stepped through - holes and spring holes are evenly spaced along the circumference in the outer push ring. A transmission screw, as a transmission part, is inserted through each stepped through - hole. After the transmission screw extends upward out of the outer push ring, it is threadedly connected to the gland. A spring, as an elastic part, is placed in each spring hole, and the top of the spring abuts against the gland.

2. The integrated radial double - end split mechanical seal according to claim 1, which is characterized in that: The connection structure between the dynamic ring and the dynamic - ring groove is as follows: A number of cylindrical pins are evenly spaced along the circumference on the bottom wall of the dynamic - ring groove, and a number of cylindrical holes are evenly spaced along the circumference at the bottom of the dynamic ring. After the dynamic ring is placed in the dynamic - ring groove, each cylindrical pin in the dynamic - ring groove extends into each cylindrical hole on the dynamic ring.

3. The integrated radial double - end split mechanical seal according to claim 1 or 2, which is characterized in that: A number of T - shaped limit blocks are evenly spaced along the circumference between the gland and the shaft sleeve. A screw is arranged on the upper section of the T - shaped limit block. The screw passes through the shaft sleeve and is connected to the main shaft. The lower section of the T - shaped limit block is fixedly connected to the gland through a screw.

4. The integrated radial double - end split mechanical seal according to claim 3, which is characterized in that: A number of L - shaped limit blocks are evenly spaced along the circumference on the shoulder of the gland. A screw is arranged on the L - shaped limit block. The screw passes through the gland and is connected to the shaft sleeve.

5. The integrated radial double - end split mechanical seal according to claim 1 or 2, which is characterized in that: A gland gasket is arranged between the split parts of the gland. A corresponding first positioning pin and a first positioning hole are arranged between the split parts of the gland. The split parts of the gland are tightened and connected through screws.

6. The integrated radial double - end split mechanical seal according to claim 1 or 2, which is characterized in that: A flat gasket is arranged on the bottom wall of the gland.

7. The integrated radial double - end split mechanical seal according to claim 1 or 2, which is characterized in that: A bushing gasket is provided between the split bushing parts. Corresponding second positioning pins and second positioning holes are provided between the split bushing parts. The split bushing parts are tightened and connected by screws.

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