Composite mechanical seal for papermaking
By designing a composite seal that combines the advantages of ordinary and containerized mechanical seals, the problems of complex and costly sealing installation in papermaking pressure screens are solved, achieving the effects of zero leakage, simplified installation, and reduced costs.
Patent Information
- Application Number
- CN202423183487.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-12-23
AI Technical Summary
The conventional mechanical seals used in existing papermaking pressure screens are complex to install and prone to leakage, while cartridge mechanical seals are expensive, making it difficult to find a balance between cost and ease of installation.
A composite mechanical seal is designed, combining the advantages of ordinary mechanical seals and cartridge mechanical seals. The compression of the sealing ring is ensured by the weight of the rotor itself. A limit block and clearance fit structure are adopted, combined with a V-type water seal and cooling water pipe, to achieve simple installation and efficient sealing.
It achieves a leak-free mechanical seal, simplifies the installation process, reduces costs, and ensures sealing performance and stability.
Smart Images
Figure CN223447630U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of sealing element, and particularly relates to a composite mechanical seal for papermaking in the papermaking industry. BACKGROUND
[0002] In the papermaking pressure screen, the mechanical seal can effectively prevent the pulp and liquid loss, and improve the stability and working efficiency of the papermaking pressure screen.
[0003] At present, the ordinary mechanical seal or the container type mechanical seal is widely used in the papermaking pressure screen, the ordinary mechanical seal is low in price, but its installation is complex, and customers need to assemble on site, and the dynamic ring compression amount is difficult to guarantee, which can easily cause the mechanical seal leakage; the container type mechanical seal is simple to install, but its price is expensive. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a composite mechanical seal for papermaking to solve the problems in the prior art.
[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0006] A composite mechanical seal for papermaking, comprising a rotor, a rotating shaft, a shaft sleeve and a sealing device, the rotating shaft is arranged in the shaft hole of the rotor, and the rotating shaft is matched with the shaft hole taper, the sealing device is sleeved on the shaft sleeve, the shaft sleeve is installed on the rotating shaft, and the rotating shaft is matched with the shaft sleeve gap; the sealing device comprises a mechanical seal seat, a mechanical seal cover, a mechanical seal static ring, a mechanical seal dynamic ring, a V-shaped water seal and a limiting block, the mechanical seal seat, the mechanical seal static ring, the mechanical seal dynamic ring and the mechanical seal cover are sequentially sleeved on the shaft sleeve from bottom to top, the mechanical seal cover is fixed with the mechanical seal seat, and the cavity is formed between the mechanical seal cover and the mechanical seal seat, the mechanical seal static ring and the mechanical seal dynamic ring are located in the cavity, and the mechanical seal static ring and the mechanical seal dynamic ring are in contact, the mechanical seal dynamic ring is fixed on the shaft sleeve, the mechanical seal static ring is fixed on the mechanical seal seat, the V-shaped water seal is sleeved on the shaft sleeve, and the bottom thereof is in contact with the mechanical seal cover, and the limiting block is fixed on the mechanical seal cover.
[0007] Preferably, the mechanical seal cover and the mechanical seal seat are fixed together through the inner hexagonal cylindrical head screw.
[0008] Preferably, the mechanical seal static ring is fixed on the mechanical seal seat through the positioning pin of the mechanical seal static ring.
[0009] Preferably, the mechanical seal dynamic ring is fixed on the shaft sleeve through the inner hexagonal locking screw.
[0010] Preferably, the limiting block is fixed on the mechanical seal cover through the screw. The first O-shaped ring is installed at the combined surface of the mechanical seal cover and the mechanical seal seat.
[0011] Preferably, a key groove is formed on the rotating shaft, a through insertion slot is formed on the lower part of the shaft sleeve, the insertion slot is open at the bottom end, the key groove corresponds to the insertion slot, and a key is arranged in the key groove and the insertion slot.
[0012] Preferably, a limiting slot is formed on the outer side of the shaft sleeve, and the limiting slot and the limiting block are matched.
[0013] Preferably, a limiting slot is formed on the outer side of the shaft sleeve, and the limiting slot and the limiting block are matched.
[0014] Preferably, the shaft sleeve is a cylindrical structure with an external variable diameter, and a positioning end face is formed at the external variable diameter of the shaft sleeve.
[0015] Preferably, the utility model also comprises a cooling water pipe.
[0016] Preferably, a sealing water pipe is arranged in the mechanical seal cover, and the sealing water pipe is connected with the cooling water pipe.
[0017] The utility model discloses a kind of composite mechanical seals, which combines the advantages of ordinary mechanical seal and assembled mechanical seal.
[0018] 1. The utility model provides a kind of composite mechanical seals combining the advantages of ordinary mechanical seal and assembled mechanical seal, which can effectively ensure the compression amount of mechanical seal, ensuring no leakage of mechanical seal, simple operation, and has advantage on price compared with assembled mechanical seal, suitable for market promotion.
[0019] 2. The utility model ensures that the mechanical seal dynamic ring reaches the set compression amount by the weight of the rotor itself, making the mechanical seal dynamic ring and the mechanical seal static ring tightly combined, and ensuring the sealing effect.
[0020] 3. The utility model sets limiting block, which can ensure the compression amount of mechanical seal without rotor, ensure the overall type of mechanical seal, not only can be delivered to user integrally, but also is convenient for installation personnel, and the use site only needs to remove limiting block, and mechanical seal is installed.
[0021] 4. The utility model is provided with key groove on the rotating shaft, and insertion slot is arranged on the shaft sleeve, when the shaft sleeve is installed in place on the rotating shaft, the key is inserted into the insertion slot and the key groove, and is fixed by first screw, so that the rotating shaft and the shaft sleeve are fixed together, prevent the shaft sleeve from rotating axially, ensure that the shaft sleeve and the rotating shaft rotate together.
[0022] 5. The utility model adopts gap fit between the rotating shaft and the shaft sleeve, which is convenient for disassembly.
[0023] 6. The utility model sets sealing water pipe connected with cooling water pipe in the mechanical seal cover, to ensure that the contact surface of mechanical seal static ring and mechanical seal dynamic ring is cooled.
[0024] 7. The utility model discloses a simple and effective structure can avoid the water inlet of mechanical seal cover through setting V type water seal on the shaft sleeve. BRIEF DESCRIPTION OF DRAWINGS
[0025] In order to make the technical scheme of the utility model embodiment clearer, the following will briefly introduce the drawing needed to be used in the embodiment description, obviously, the drawing in the following description is some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.
[0026] Figure 1 It is the structure schematic diagram of the utility model;
[0027] Figure 2 It is the structure schematic diagram of the shaft sleeve;
[0028] Figure 3 It is Figure 2 Sectional view of
[0029] Figure 4 It is the structure schematic diagram of the shaft;
[0030] Reference numerals: 1, rotor;2, shaft;3, shaft sleeve;4, mechanical seal seat;5, mechanical seal cover;6, mechanical seal static ring;7, mechanical seal dynamic ring;8, V type water seal;9, limit block;10, inner hexagonal cylindrical head screw;11, inner hexagonal set screw;12, first O ring;13, second O ring installation groove;14, second O ring;15, keyway;16, insertion slot;17, key;18, limit slot;19, positioning end face;20, cooling water pipe;21, second screw;22, first O ring installation groove;23, first screw. DETAILED DESCRIPTION
[0031] In order to make the technical scheme of the utility model embodiment clearer, the following will briefly introduce the drawing needed to be used in the embodiment description, obviously, the drawing in the following description is some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.
[0032] As Figures 1-4The application discloses a kind of composite mechanical seal for papermaking, including rotor 1, rotating shaft 2, shaft sleeve 3 and sealing device, rotating shaft 2 is arranged in the shaft hole of rotor 1, and rotating shaft 2 is tapered with shaft hole cooperation, sealing device is sleeved on shaft sleeve 3, shaft sleeve 3 is installed on rotating shaft 2, the clearance cooperation between the rotating shaft 2 and the shaft sleeve 3;The sealing device includes mechanical seal seat 4, mechanical seal cover 5, mechanical seal static ring 6, mechanical seal dynamic ring 7, V type water seal 8 and limit block 9, mechanical seal seat 4, mechanical seal static ring 6, mechanical seal dynamic ring 7 and mechanical seal cover 5 are sequentially sleeved on shaft sleeve 3 from bottom to top, mechanical seal cover 5 is fixed with mechanical seal seat 4 by internal hexagonal cylinder head screw 10, and cavity is formed between mechanical seal cover 5 and mechanical seal seat 4, mechanical seal static ring 6, mechanical seal dynamic ring 7 is located in cavity, and mechanical seal static ring 6 and mechanical seal dynamic ring 7 contact, mechanical seal dynamic ring 7 is fixed on shaft sleeve 3 by internal hexagonal set screw 11, mechanical seal static ring 6 is fixed on mechanical seal seat 4 by the positioning pin of itself, V type water seal 8 is sleeved on shaft sleeve 3, and its bottom is contacted with mechanical seal cover 5, forms the water seal of axial and end surface, limit block 9 is fixed on mechanical seal cover 5 by second screw 21.
[0033] First O-ring 12 is installed at the junction surface of the mechanical seal seat 4 and the mechanical seal cover 5, which realizes the gap sealing between the mechanical seal seat 4 and the mechanical seal cover 5.
[0034] Second O-ring installation grooves 13 are respectively formed on the inner and outer sides of the upper part of the shaft sleeve 3, and second O-rings 14 are respectively installed in the second O-ring installation grooves 13, which can ensure the sealing between the shaft sleeve 3 and the rotor 1 and between the shaft sleeve 3 and the rotating shaft 2, and prevent the rotor 1 and the rotating shaft 2 from contacting the pulp.
[0035] A key groove 15 is formed on the rotating shaft 2, a through insertion groove 16 is formed on the lower part of the shaft sleeve 3, the bottom end of the insertion groove 16 is open, the key groove 15 corresponds to the insertion groove 16, and a key 17 is arranged in the key groove 15 and the insertion groove 16. When the shaft sleeve 3 is installed on the rotating shaft 2, the key 17 is inserted into the insertion groove 16 and the key groove 15, and is fixed by a first screw 23, so that the rotating shaft 2 and the shaft sleeve 3 can be fixed together, the shaft sleeve 3 is prevented from rotating axially, and the shaft sleeve 3 and the rotating shaft 2 can rotate together.
[0036] A limiting groove 18 is formed on the outer side of the shaft sleeve 3, and the limiting groove 18 cooperates with the limit block 9 to limit the axial position of the shaft sleeve 3 and the mechanical seal cover 5.
[0037] The shaft sleeve 3 is a cylindrical structure with variable external diameter, and a positioning end face 19 is formed at the variable external diameter of the shaft sleeve 3, which can position the installation position of the mechanical seal dynamic ring 7 on the shaft sleeve 3 and prevent the mechanical seal dynamic ring 7 from moving upward.
[0038] The composite mechanical seal is fixed on the bearing frame through the mechanical seal cover 5.
[0039] The cooling water pipe 20 is further included.
[0040] The mechanical seal cover 5 is internally provided with a sealing water pipe connected with the cooling water pipe 20 for conveying cooling water, which serves to cool the joint surface of the mechanical seal static ring 6 and the mechanical seal dynamic ring 7.
[0041] The mechanical seal seat 4 is provided with a first O-ring installation groove 22, and the first O-ring 12 is installed in the first O-ring installation groove 22.
[0042] Working principle:
[0043] During assembly, the mechanical seal dynamic ring 7 is fixed on the shaft sleeve 3 through the inner hexagonal set screw 11, so as to ensure that the shaft sleeve 3 and the mechanical seal dynamic ring 7 are integrated. Since the shaft sleeve 3 is a cylindrical body with an external variable diameter, a positioning end surface 19 is formed at the external variable diameter of the shaft sleeve 3, which can position the installation position of the mechanical seal dynamic ring 7 on the shaft sleeve 3 and prevent the mechanical seal dynamic ring 7 from moving upward in the axial direction. The mechanical seal static ring 6 is placed on the mechanical seal seat 4 and fixed through its own positioning pin. Then, the combination of the shaft sleeve 3 and the mechanical seal dynamic ring 7 is placed into the mechanical seal seat 4, so as to ensure that the mechanical seal dynamic ring 7 and the mechanical seal static ring 6 are in contact. Subsequently, the mechanical seal cover 5 is inserted from the upper portion of the shaft sleeve 3 and fixed to the mechanical seal seat 4 through the inner hexagonal cylindrical head screw 10. Then, the V-shaped water seal 8 is inserted from the upper portion of the shaft sleeve 3 and brought into contact with the mechanical seal cover 5, so as to form a water seal in the axial direction and the end surface. Subsequently, one end of the limiting block 9 is inserted into the limiting groove 18 formed on the outer side of the shaft sleeve 3, and the limiting block 9 is fixed to the mechanical seal cover 5 through the second screw 21. At this time, the limiting block 9 can transmit a downward extrusion force to the shaft sleeve 3. Since the shaft sleeve 3 and the mechanical seal dynamic ring 7 are integrated, and the mechanical seal static ring 6 is fixed, the spring of the mechanical seal dynamic ring 7 is compressed when subjected to the downward extrusion force, so as to ensure the compression amount of the mechanical seal dynamic ring 7 in the original state, thereby ensuring that the mechanical seal dynamic ring 7 and the mechanical seal static ring 6 are tightly combined and the sealing effect is ensured, that is, the integrity of the mechanical seal is ensured. During use, after the user completes the installation of the rotor 1, the limiting block 9 is removed. At this time, the gravity of the rotor 1 is transmitted to the shaft sleeve 3, and the shaft sleeve 3 and the mechanical seal dynamic ring 7 are subjected to a downward extrusion force. Since the mechanical seal static ring 6 is fixed, the spring of the mechanical seal dynamic ring 7 is compressed when subjected to the downward extrusion force, so as to achieve the compression amount of the mechanical seal dynamic ring 7, thereby ensuring that the mechanical seal dynamic ring 7 and the mechanical seal static ring 6 are tightly combined and the sealing effect is ensured. No further action is required, and the mechanical seal can be used.
[0044] Finally, it should be noted that the above examples are intended to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A composite mechanical seal for papermaking, comprising a rotor (1), a rotating shaft (2), a sleeve (3) and a sealing device, wherein the rotating shaft (2) is arranged in a shaft hole of the rotor (1), and the rotating shaft (2) and the shaft hole are tapered together, the sealing device is sleeved on the sleeve (3), and the sleeve (3) is mounted on the rotating shaft (2), and is characterized in that: The rotating shaft (2) and the shaft sleeve (3) are clearance-matched; the sealing device comprises a mechanical seal seat (4), a mechanical seal cover (5), a mechanical seal static ring (6), a mechanical seal dynamic ring (7), a V-shaped water seal (8) and a limit block (9); the mechanical seal seat (4), the mechanical seal static ring (6), the mechanical seal dynamic ring (7) and the mechanical seal cover (5) are sequentially sleeved on the shaft sleeve (3) from bottom to top; the mechanical seal cover (5) and the mechanical seal seat (4) are fixed together, and the mechanical seal A cavity is formed between the sealing cover (5) and the mechanical seal seat (4); a mechanical seal static ring (6) and a mechanical seal dynamic ring (7) are located in the cavity, and the mechanical seal static ring (6) and the mechanical seal dynamic ring (7) are in contact with each other; the mechanical seal dynamic ring (7) is fixed on the shaft sleeve (3); the mechanical seal static ring (6) is fixed on the mechanical seal seat (4); a V-shaped water seal (8) is sleeved on the shaft sleeve (3); and a bottom of the V-shaped water seal is in contact with the mechanical seal cover (5); and a limit block (9) is fixed on the mechanical seal cover (5).
2. The composite mechanical seal for papermaking according to claim 1, characterized in that: The mechanical seal cover (5) and the mechanical seal seat (4) are fixed together by means of hexagon socket head screws (10).
3. The composite mechanical seal for papermaking according to claim 1, characterized in that: The mechanical seal static ring (6) is fixed on the mechanical seal seat (4) via its own positioning pins.
4. The composite mechanical seal for papermaking according to claim 1, characterized in that: The mechanical seal dynamic ring (7) is fixed on the shaft sleeve (3) via a hexagon socket set screw (11).
5. The composite mechanical seal for papermaking according to claim 1, characterized in that: The limiting block (9) is fixed on the mechanical sealing cover (5) by screws.
6. The composite mechanical seal for papermaking according to claim 1, characterized in that: A first O-ring (12) is installed at the joint surface between the mechanical seal cover (5) and the mechanical seal seat (4).
7. The composite mechanical seal for papermaking according to claim 1, characterized in that: The rotating shaft (2) is provided with a keyway (15), the lower part of the shaft sleeve (3) is provided with a transparent slot (16), the bottom end of the slot (16) is open, the keyway (15) corresponds to the slot (16), and the keyway (15) and the slot (16) are matched with each other and provided with a key (17).
8. The composite mechanical seal for papermaking according to claim 1, characterized in that: A limiting groove (18) is provided on the outer side of the shaft sleeve (3), and the limiting groove (18) cooperates with the limiting block (9).
9. The composite mechanical seal for papermaking according to claim 1, characterized in that: The shaft sleeve (3) is a cylindrical structure with an external diameter change, and a positioning end surface (19) is formed at the external diameter change portion of the shaft sleeve (3).
10. The composite mechanical seal for papermaking according to claim 1, characterized in that: It also includes a cooling water pipe (20). A sealing water pipe is provided inside the mechanical sealing cover (5), and the sealing water pipe is connected to the cooling water pipe (20).