Cartridge axial double split mechanical seal

Abstract

The present invention discloses a containerized axial double-end face split mechanical seal, comprising: a shaft sleeve, a gland, a medium dynamic ring, a medium static ring, an atmospheric dynamic ring and an atmospheric static ring, the shaft sleeve is sleeved on the main shaft, a medium dynamic ring groove is arranged at the bottom of the shaft sleeve, the medium dynamic ring is fixed in the medium dynamic ring groove, the medium static ring is sealed with the medium dynamic ring, and a first push ring is arranged at the top of the medium static ring; a large atmospheric dynamic ring groove is arranged at the top of the shaft sleeve, the large atmospheric dynamic ring is fixed in the large atmospheric dynamic ring groove, the atmospheric static ring is sealed with the atmospheric dynamic ring, and a second push ring is arranged at the bottom of the atmospheric static ring, the gland is sleeved on the shaft sleeve, an inwardly protruding connecting step is arranged on the gland, a plurality of first transmission members and a plurality of first elastic members are arranged between the first push ring and the connecting step, and a plurality of second transmission members and a plurality of second elastic members are arranged between the second push ring and the connecting step. The present invention has a strong sealing effect and is convenient for disassembly and assembly.

Description

Technical Field

[0001] The invention relates to a mechanical seal, in particular to a containerized axial double-end-face split type mechanical seal. Background Art

[0002] The main parts of traditional mechanical seals, such as the dynamic ring, static ring, gland and sleeve, are all closed annular bodies. During installation, the mechanical seal must be mounted on the main shaft before other parts can be installed on the main shaft. During removal, other parts on the main shaft must be removed before the mechanical seal can be mounted on the main shaft. This kind of disassembly and assembly work is not only cumbersome and reduces production efficiency, but also requires the staff to have extremely high precision installation capabilities. Summary of the invention

[0003] The purpose of the present invention is to provide a containerized axial double-end face split type mechanical seal which is easy to assemble and disassemble and has high sealing performance.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: an assembled axial double-end face split mechanical seal, including: a sleeve, a pressure cover, a medium dynamic ring, a medium static ring, an atmospheric dynamic ring and an atmospheric static ring. The sleeve, the pressure cover, the medium dynamic ring, the medium static ring, the atmospheric dynamic ring and the atmospheric static ring are all center split parts. The sleeve split parts are assembled and sleeved on the main shaft. A first sealing ring is arranged between the sleeve and the main shaft. A medium dynamic ring groove is arranged at the bottom of the sleeve. The medium dynamic ring split parts are fixed in the medium dynamic ring groove after being assembled. A second sealing ring is arranged between the medium dynamic ring and the medium dynamic ring groove. The medium static ring split parts are sealed and connected to the medium dynamic ring after being assembled. A first push ring is arranged on the top of the medium static ring; an atmospheric dynamic ring groove is arranged on the top of the sleeve. The atmospheric dynamic ring split parts are fixed after being assembled It is fixed in the atmospheric dynamic ring groove, and a third sealing ring is arranged between the atmospheric dynamic ring and the atmospheric dynamic ring groove. The atmospheric static ring halves are assembled and sealed with the atmospheric dynamic ring. A second push ring is arranged at the bottom of the atmospheric static ring, and an annular cavity is left between the first push ring and the second push ring; the pressure cover halves are assembled and sleeved on the shaft sleeve, and a fourth sealing ring is arranged between the pressure cover and the medium static ring and the atmospheric static ring. An inwardly protruding connecting step is arranged on the pressure cover, and the connecting step extends into the annular cavity between the first push ring and the second push ring. There are movable gaps between the connecting step and the first push ring and the second push ring. A plurality of first transmission members and a plurality of first elastic members are arranged between the first push ring and the connecting step, and a plurality of second transmission members and a plurality of second elastic members are arranged between the second push ring and the connecting step.

[0005] Furthermore, in the aforementioned assembled axial double-end face split mechanical seal, the first push ring is a center split part, and a plurality of step through holes and spring holes are evenly spaced along the circumference in the first push ring, and a first transmission screw is passed through each step through hole as a first transmission part, and the first transmission screw extends upward from the first push ring and is threadedly connected to the connecting step, and a first spring is placed in each spring hole as a first elastic part, and the top end of the first spring abuts against the connecting step; the second push ring is a center split part, and a plurality of step through holes and spring holes are evenly spaced along the circumference in the second push ring, and a second transmission screw is passed through each step through hole as a second transmission part, and the second transmission screw extends downward from the second push ring and is threadedly connected to the connecting step, and a second spring is placed in each spring hole as a second elastic part, and the bottom end of the second spring abuts against the connecting step.

[0006] Furthermore, in the aforementioned assembled axial double-end face split mechanical seal, a plurality of first cylindrical pins are evenly spaced along the circumference in the medium moving ring groove, and a plurality of first cylindrical holes are evenly spaced along the circumference at the bottom of the medium moving ring; after the medium moving ring is placed in the medium moving ring groove, the first cylindrical pins in the medium moving ring groove respectively extend into the first cylindrical holes on the medium moving ring; a plurality of second cylindrical pins are evenly spaced along the circumference in the large gas moving ring groove, and a plurality of second cylindrical holes are evenly spaced along the circumference at the top of the large gas moving ring; after the large gas moving ring is placed in the large gas moving ring groove, the second cylindrical pins in the large gas moving ring groove respectively extend into the second cylindrical holes on the large gas moving ring.

[0007] Furthermore, in the aforementioned assembled axial double-end face split mechanical seal, a plurality of L-shaped limit blocks are evenly spaced along the circumference between the sleeve and the gland, the long part of the L-shaped limit block is connected to the sleeve by screws, and the short part of the L-shaped limit block is connected to the top of the gland by screws.

[0008] Furthermore, in the aforementioned assembled axial double-end split mechanical seal, a sleeve gasket is arranged between the sleeve halves, a first locating pin and a first locating hole are arranged between the sleeve halves, and the sleeve halves are tightened and connected by screws.

[0009] Furthermore, in the aforementioned assembled axial double-end face split mechanical seal, a gland gasket is arranged between the gland halves, a second positioning pin and a second positioning hole are arranged between the gland halves, and the gland halves are tightened and connected by screws.

[0010] Furthermore, in the aforementioned assembled axial double-end face split mechanical seal, a flat gasket is arranged at the bottom of the gland.

[0011] The advantages of the present invention are as follows: since the shaft sleeve, gland, medium dynamic ring, medium static ring, atmospheric dynamic ring and atmospheric static ring all adopt a split structure, when installing or replacing the mechanical seal, it is not necessary to insert it from the end of the main shaft, which does not require the removal of other components on the main shaft, thereby reducing the workload and improving the work efficiency. Moreover, when the split mechanical seal is subjected to medium pressure, the contact pressure between the medium dynamic ring and the medium static ring and the inner static ring increases with the increase of the pressure of the sealed medium, thereby increasing the resistance of the sealed medium to flow out of the sealing surface. The additional sealing connection of the atmospheric dynamic ring and the atmospheric static ring can not only improve the sealing performance and service life of the mechanical seal, but also improve the anti-evacuation capability of the mechanical seal, thereby increasing the scope of application of the mechanical seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic cross-sectional view of the structure of the assembled axial double-end-face split mechanical seal described in the present invention. DETAILED DESCRIPTION

[0013] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and preferred embodiments.

[0014] like Figure 1As shown, the assembled axial double-end face split mechanical seal of the present invention comprises: a sleeve 1, a gland 2, a medium dynamic ring 3, a medium static ring 4, an atmospheric dynamic ring 5 and an atmospheric static ring 6. The sleeve 1, the gland 2, the medium dynamic ring 3, the medium static ring 4, the atmospheric dynamic ring 5 and the atmospheric static ring 6 are all center split parts. The split parts of the sleeve 1 are assembled and mounted on the main shaft 10. A first sealing ring 11 is arranged between the sleeve 1 and the main shaft 10. A medium dynamic ring groove is arranged at the bottom of the sleeve 1. 12, a plurality of first cylindrical pins 13 are evenly spaced along the circumference in the medium moving ring groove 12, a plurality of first cylindrical holes 31 are evenly spaced along the circumference at the bottom of the medium moving ring 3, the split pieces of the medium moving ring 3 are assembled and placed in the medium moving ring groove, each first cylindrical pin 13 in the medium moving ring groove 12 extends into each first cylindrical hole 31 on the medium moving ring 3, and a second sealing ring 32 is arranged between the medium moving ring 3 and the medium moving ring groove 12 , the split pieces of the medium static ring 4 are sealed and connected with the medium dynamic ring 3 after being assembled, and a first push ring 40 is arranged on the top of the medium static ring 4, and the first push ring 40 is a center split piece; a large dynamic ring groove 14 is arranged on the top of the sleeve 1, and a plurality of second cylindrical pins 15 are evenly spaced along the circumference in the large dynamic ring groove 14, and a plurality of second cylindrical holes 51 are evenly spaced along the circumference at the top of the large dynamic ring 5. The split pieces of the large dynamic ring 5 are placed in the large dynamic ring groove 14 after being assembled, and each second cylindrical pin 15 in the large dynamic ring groove 14 extends into each second cylindrical hole 51 on the large dynamic ring 5 respectively, and a third sealing ring 52 is arranged between the large dynamic ring 5 and the large dynamic ring groove 15. The split pieces of the atmospheric static ring 6 are sealed and connected with the atmospheric dynamic ring 5 after being assembled, and a second push ring 60 is arranged at the bottom of the atmospheric static ring 6, and the second push ring 60 is a center split piece, and an annular cavity is left between the first push ring 40 and the second push ring 60;The split pieces of the gland 2 are assembled and mounted on the shaft sleeve 1. A fourth sealing ring 21 is provided between the gland 2 and the medium static ring 4 and the atmospheric static ring 6. A connecting step 22 protruding inward is provided on the gland 2. The connecting step 22 extends into the annular cavity between the first push ring 40 and the second push ring 60. There is a movable gap between the connecting step 22 and the first push ring 40 and the second push ring 60. A plurality of step through holes and spring holes are evenly spaced along the circumference of the first push ring 40. A first transmission screw 41 is inserted into each step through hole as a first transmission member. The first transmission screw 41 extends upward at The first push ring 40 is threadedly connected to the connecting step 22, and a first spring 42 is placed in each spring hole as a first elastic member, and the top of the first spring 42 abuts against the connecting step 22. In the second push ring 60, a plurality of step through holes and spring holes are evenly spaced along the circumference, and a second transmission screw 61 is inserted into each step through hole as a second transmission member. The second transmission screw 61 extends downward from the second push ring 60 and is threadedly connected to the connecting step 22. A second spring 62 is placed in each spring hole as a second elastic member, and the bottom of the second spring 62 abuts against the connecting step 22. ;

[0015] In this embodiment, a plurality of L-shaped limit blocks 7 are evenly spaced along the circumference between the sleeve 1 and the pressure cover 2, the long portion 71 of the L-shaped limit block 7 is connected to the sleeve 1 by screws, and the short portion 72 of the L-shaped limit block 7 is connected to the top of the pressure cover 2 by screws.

[0016] In this embodiment, a sleeve gasket 16 is provided between the split pieces of the sleeve 1, a first positioning pin 17 and a first positioning hole 18 are provided between the split pieces of the sleeve 1, and the split pieces of the sleeve 1 are tightened and connected by screws. A gland gasket 23 is provided between the split pieces of the gland 2, a second positioning pin 24 and a second positioning hole 25 are provided between the split pieces of the gland 2, and the split pieces of the gland 2 are tightened and connected by screws, and a flat gasket 26 is provided at the bottom of the gland 2.

[0017] The advantages of the present invention are as follows: since the shaft sleeve, gland, medium dynamic ring, medium static ring, atmospheric dynamic ring and atmospheric static ring all adopt a split structure, when installing or replacing the mechanical seal, it is not necessary to insert it from the end of the main shaft, which does not require the removal of other components on the main shaft, thereby reducing the workload and improving the work efficiency. Moreover, when the split mechanical seal is subjected to medium pressure, the contact pressure between the medium dynamic ring and the medium static ring and the inner static ring increases with the increase of the pressure of the sealed medium, thereby increasing the resistance of the sealed medium to flow out of the sealing surface. The additional sealing connection of the atmospheric dynamic ring and the atmospheric static ring can not only improve the sealing performance and service life of the mechanical seal, but also improve the anti-evacuation capability of the mechanical seal, thereby increasing the scope of application of the mechanical seal.

Claims

1. Containerized axial double-end split mechanical seal, Features: include: The shaft sleeve, pressure cover, medium dynamic ring, medium static ring, atmospheric dynamic ring and atmospheric static ring are all center split parts. The shaft sleeve split parts are assembled and mounted on the main shaft. A first sealing ring is arranged between the shaft sleeve and the main shaft. A medium dynamic ring groove is arranged at the bottom of the shaft sleeve. The medium dynamic ring split parts are assembled and fixed in the medium dynamic ring groove. A second sealing ring is arranged between the medium dynamic ring and the medium dynamic ring groove. The medium static ring split parts are assembled and sealed with the medium dynamic ring. A third sealing ring is arranged on the top of the medium static ring. a push ring; a large dynamic ring groove is arranged on the top of the shaft sleeve, and the large dynamic ring split pieces are fixed in the large dynamic ring groove after being assembled, a third sealing ring is arranged between the large dynamic ring and the large dynamic ring groove, and the atmospheric static ring split pieces are sealed and connected with the atmospheric dynamic ring after being assembled, a second push ring is arranged at the bottom of the atmospheric static ring, and an annular cavity is left between the first push ring and the second push ring; the gland split pieces are assembled and sleeved on the shaft sleeve, and a fourth sealing ring is arranged between the gland and the medium static ring and the atmospheric static ring, and an inwardly protruding connecting step is arranged on the gland, and the connecting step extends into the first In the annular cavity between the push ring and the second push ring, there are movable gaps between the connecting step and the first push ring and the second push ring. A plurality of first transmission members and a plurality of first elastic members are arranged between the first push ring and the connecting step, and a plurality of second transmission members and a plurality of second elastic members are arranged between the second push ring and the connecting step; the first push ring is a center split member, and a plurality of step through holes and spring holes are evenly spaced along the circumference in the first push ring, and a first transmission screw is passed through each step through hole as a first transmission member, which extends upward from the first push ring and is threadedly connected to the connecting step, and a first spring is placed in each spring hole as a first elastic member, and the top end of the first spring rests on the connecting step; the second push ring is a center split member, and a plurality of step through holes and spring holes are evenly spaced along the circumference in the second push ring, and a second transmission screw is passed through each step through hole as a second transmission member, which extends downward from the second push ring and is threadedly connected to the connecting step, and a second spring is placed in each spring hole as a second elastic member, and the bottom end of the second spring rests on the connecting step.

2. The assembled axial double-end split mechanical seal according to claim 1, Features: A number of first cylindrical pins are evenly spaced along the circumference in the medium moving ring groove, and a number of first cylindrical holes are evenly spaced along the circumference at the bottom of the medium moving ring. After the medium moving ring is placed in the medium moving ring groove, the first cylindrical pins in the medium moving ring groove respectively extend into the first cylindrical holes on the medium moving ring; a number of second cylindrical pins are evenly spaced along the circumference in the large air moving ring groove, and a number of second cylindrical holes are evenly spaced along the circumference at the top of the large air moving ring. After the large air moving ring is placed in the large air moving ring groove, the second cylindrical pins in the large air moving ring groove respectively extend into the second cylindrical holes on the large air moving ring.

3. The assembled axial double-end split mechanical seal according to claim 1 or 2, Features: A plurality of L-shaped limit blocks are evenly spaced along the circumference between the shaft sleeve and the gland, the long portion of the L-shaped limit block is connected to the shaft sleeve by screws, and the short portion of the L-shaped limit block is connected to the top of the gland by screws.

4. The assembled axial double-end split mechanical seal according to claim 1 or 2, Features: A shaft sleeve gasket is arranged between the shaft sleeve split pieces, a first positioning pin and a first positioning hole are arranged between the shaft sleeve split pieces, and the shaft sleeve split pieces are tightened and connected by screws.

5. The assembled axial double-end split mechanical seal according to claim 1 or 2, Features: A gland gasket is arranged between the gland halves, a second positioning pin and a second positioning hole are arranged between the gland halves, and the gland halves are tightened and connected by screws.

6. The assembled axial double-end split mechanical seal according to claim 1 or 2, Features: A flat gasket is arranged at the bottom of the gland.

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