Container type mechanical seal for corn fermentation slurry pump

Abstract

The utility model discloses a packaging type mechanical seal for a corn fermentation slurry pump, which relates to the technical field of mechanical seals and particularly comprises a mechanical seal shaft sleeve, a material seal moving ring is connected to the outer ring of the left end of the mechanical seal shaft sleeve, and a material seal friction pair is embedded in the right side of the material seal moving ring; the outer ring of the right end of the mechanical seal shaft sleeve is connected with a water seal moving ring, and a water seal moving ring friction pair is embedded in the left side of the water seal moving ring. The outer portion of the mechanical seal shaft sleeve is movably connected with a sealing gland, the sealing gland is arranged between the material seal moving ring and the water seal moving ring, a notch pre-tightening snap spring groove is formed in the outer ring of the right end of the mechanical seal shaft sleeve, a snap spring is arranged in the notch pre-tightening snap spring groove, and the snap spring is tightly attached to the side, away from the sealing gland, of the water seal moving ring. According to the packaging type mechanical seal for the corn fermentation slurry pump, the packaging type integral sealing structure is convenient to install and has a good sealing effect, and it is ensured that the corn fermentation slurry pump has good reliability and long service life.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a container-type mechanical seal for a corn fermentation slurry pump. Background Art

[0002] Corn processing is a vital raw material source for the food and pharmaceutical industries. Pumps for transferring fermented corn slurry are key conveying equipment in this process. Because the corn in the fermented slurry is fermented into a paste-like state and contains little water, it is prone to accumulation and sedimentation. This often leads to impeller clogging and seal failure in these pumps. While the use of semi-open and fully open impeller configurations has largely resolved the clogging issue, seal failure continues to plague slurry pumps. Previously, packing seals and dynamic seals were commonly used, but these seals are prone to bubbling, bubbling, dripping, and leaking, and no longer meet modern environmental standards. Conventional mechanical seals, however, are susceptible to O-ring failure and spring fouling due to the low water content and short fibers in the slurry. This results in extremely short seal lifespans, requiring repair and replacement within a month or so, significantly increasing maintenance costs and environmental impact. This technical solution was developed to address the challenges of seal failure, leakage, and short lifespan in corn slurry transfer pumps. Utility Model Content

[0003] In response to the shortcomings of the above-mentioned prior art, the utility model provides a container-type mechanical seal for a corn fermentation slurry pump. The purpose is to design a fully container-type mechanical seal based on the characteristics of corn fermentation slurry. The seal has a simple structure, is easy to install, and is highly reliable. The seal effectively ensures the long life and low maintenance cost of the mechanical seal.

[0004] The utility model provides the following technical solution: a container-type mechanical seal for a corn fermentation slurry pump, comprising a machine seal sleeve, wherein the outer ring at the left end of the machine seal sleeve is connected to a material seal dynamic ring, and the right side of the material seal dynamic ring is inlaid with a material seal friction pair; the outer ring at the right end of the machine seal sleeve is connected to a water seal dynamic ring, and the left side of the water seal dynamic ring is inlaid with a water seal dynamic ring friction pair; the outside of the machine seal sleeve is movably connected to a sealing gland, and the sealing gland is arranged between the material seal dynamic ring and the water seal dynamic ring, the outer ring at the right end of the machine seal sleeve is provided with a notch pre-tightening retaining ring groove, a retaining ring is arranged in the notch pre-tightening retaining ring groove, and the retaining ring is tightly fitted to the side of the water seal dynamic ring away from the sealing gland;

[0005] A material seal static ring is sleeved on the left side of the inner cavity of the sealing gland, and the material seal static ring is connected to the machine seal sleeve through the material seal static ring friction pair, and the material seal static ring is in contact with the material seal dynamic ring; a water seal static ring is sleeved on the right side of the inner cavity of the sealing gland, and the water seal static ring is connected to the machine seal sleeve through the water seal static ring friction pair, and the water seal static ring is in contact with the water seal dynamic ring; a large spring is provided between the material seal static ring and the water seal static ring, and the large spring is movably sleeved on the machine seal sleeve, one end of the large spring is fixed to the water seal static ring, and the other end of the large spring is in contact with the material seal static ring through a push plate; and the water seal static ring is pre-tightened by a pre-tightening pressure plate installed at the right end of the sealing gland, and the pre-tightening pressure plate is connected to the right end of the sealing gland through a pre-tightening bolt, and 2mm adjustment space is left;

[0006] The sealing gland includes a gland body, a sealing plate connected to the gland body, and a pump cover connected to the other side of the sealing plate. The pump cover is located on the side of the sealing plate close to the material seal dynamic ring. The sealing plate is connected to the material seal static ring. The right end of the material seal static ring is sleeved on the inside of the sealing plate, and a gap of 3mm is maintained between the left side of the sealing plate and the material seal static ring. The gland body is connected to the water seal static ring. A sealing gland water inlet hole is provided at the bottom of the sealing gland, and an inclined sealing gland water outlet hole is provided at the top of the sealing gland.

[0007] Preferably, a material seal dynamic ring O-ring is provided between the material seal dynamic ring and the machine seal shaft sleeve, and the material seal dynamic ring is connected to the machine seal shaft sleeve via a material seal anti-rotation pin.

[0008] Preferably, there are two O-rings for the material seal dynamic ring, and the two O-rings for the material seal dynamic ring are arranged in parallel between the material seal dynamic ring and the mechanical seal shaft sleeve.

[0009] Preferably, a material seal static ring O-ring is provided between the material seal static ring and the sealing pressure plate, an O-ring 1 is provided between the pressure cover body and the sealing pressure plate, an O-ring 2 is provided between the sealing pressure plate and the pump cover, a water seal static ring O-ring is provided between the water seal static ring and the pressure cover body, and the water seal static ring is connected to the pressure cover body through a water seal static ring anti-rotation pin.

[0010] Preferably, the inner diameters of the material seal static ring, water seal static ring and push plate are all larger than the outer diameter of the machine seal sleeve, a cooling cavity is formed between the sealing cover and the machine seal sleeve, and the sealing cover water inlet hole and the sealing cover water outlet hole are connected through the cooling cavity.

[0011] Preferably, the water seal dynamic ring is fixedly mounted on the machine seal shaft sleeve by means of process screws, and a water seal dynamic ring O-ring is provided between the water seal dynamic ring and the machine seal shaft sleeve.

[0012] Preferably, the gland body, the sealing pressure plate and the pump cover are connected by fixing bolts; the inner diameter of the sealing gland water inlet hole is larger than the inner diameter of the sealing gland water outlet hole, and the sealing gland water outlet hole is arranged obliquely above the water seal static ring.

[0013] Preferably, an O-ring three is provided at the left end of the mechanical seal sleeve.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This corn fermentation slurry pump uses a modular mechanical seal. Pre-tightening of the two friction pairs in the material seal structure and the two friction pairs in the water seal structure is achieved through a large spring. This allows the material seal and water seal structures to compensate for each other, preventing failure of one end from affecting the entire seal. Furthermore, slurry is less likely to accumulate and scale on the large spring, making the large spring less susceptible to failure. The water seal's static ring is pre-tightened by a pre-tightening pressure plate, eliminating the drawback of the original retaining spring slot, which could easily cause the retaining spring to jump out of the slot and cause seal failure. The seal at the material seal end is pre-tightened by the material seal spring, preventing slurry accumulation on the friction pair, which could cause wear and failure. It also lubricates the friction pair, extending its service life.

[0016] 2. The corn fermentation slurry pump uses a cartridge mechanical seal. The cartridge overall sealing structure is not only easy to install, but also has a good sealing effect, ensuring that the corn fermentation slurry delivery pump has good reliability and long life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure and use of the present utility model.

[0018] In the figure: 1. Machine seal sleeve; 2. Material seal dynamic ring O-ring; 3. Material seal anti-rotation pin; 4. Material seal dynamic ring; 5. Material seal static ring; 6. Material seal static ring O-ring; 7. Push plate; 8. Large spring; 9. Water seal static ring anti-rotation pin; 10. Water seal static ring; 11. Water seal static ring O-ring; 12. Pre-tightening pressure plate; 13. Water seal dynamic ring; 14. Water seal dynamic ring O-ring; 15. Process screw; 16. Notch pre-tightening retaining ring groove; 17. Gland body; 18. Sealing pressure plate; 19. Pump cover; 20. Impeller; 21. Rotating shaft; A. O-ring three; B. O-ring one; C. O-ring two; D. Fixing bolt; E. Pre-tightening bolt; G. Sealing cover water inlet; H. Sealing cover water outlet. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] The utility model provides a containerized mechanical seal for a corn fermentation slurry pump, comprising a mechanical seal sleeve 1. A material seal dynamic ring 4 is connected to the outer ring at the left end of the mechanical seal sleeve 1. A material seal friction pair is embedded on the right side of the material seal dynamic ring 4. The material seal dynamic ring 4 is connected to the mechanical seal sleeve 1 via a material seal anti-rotation pin 3. Two material seal dynamic ring O-rings 2 are provided between the material seal dynamic ring 4 and the mechanical seal sleeve 1. The two material seal dynamic ring O-rings 2 are arranged side by side between the material seal dynamic ring 4 and the mechanical seal sleeve 1 to ensure that slurry does not enter the interior of the material seal. The material seal dynamic ring 4 and the mechanical seal sleeve 1 are connected as a whole to form a material seal dynamic ring structure.

[0021] The outer ring of the mechanical seal sleeve 1 is movably connected with a sealing gland, which includes a gland body 17, a sealing pressure plate 18 and a pump cover 19 arranged in sequence. The gland body 17, the sealing pressure plate 18 and the pump cover 19 are connected by fixing bolts D. The pump cover 19 is located on the side of the sealing pressure plate 18 away from the gland body 17. An O-ring 1 B is provided between the gland body 17 and the sealing pressure plate 18, and an O-ring 2 C is provided between the sealing pressure plate 18 and the pump cover 19.

[0022] A static seal ring 5 is sleeved on the left side of the gland cavity. It is connected to the mechanical seal sleeve 1 via a static seal friction pair and contacts the right side of the dynamic seal ring 4, forming a seal structure. The static seal ring 5 is connected to the sealing plate 18, with the right end of the static seal ring 5 sleeved inside the sealing plate 18. A 3mm gap is maintained between the left side of the sealing plate 18 and the static seal ring 5, providing an adjustable seal space. A static seal O-ring 6 is provided between the sealing plate 18 and the static seal ring 5.

[0023] A water seal static ring 10 is sleeved on the right side of the inner cavity of the sealing cover. The water seal static ring 10 is connected to the machine seal shaft sleeve 1 through the water seal static ring friction pair. The cover body 17 is connected to the water seal static ring 10. The water seal static ring 10 is connected to the cover body 17 through the water seal static ring anti-rotation pin 9. A water seal static ring O-ring 11 is provided between the water seal static ring 10 and the cover body 17.

[0024] A large spring 8 is provided between the material seal static ring 5 and the water seal static ring 10. The large spring 8 is movably sleeved on the mechanical seal shaft sleeve 1. One end of the large spring 8 is fixed to the water seal static ring 10, and the other end of the large spring 8 contacts the material seal static ring 5 through the push plate 7. The water seal static ring 10 is pre-tightened by a pre-tightening plate 12 installed on the right end of the sealing gland. The pre-tightening plate 12 is connected to the right end of the sealing gland by a pre-tightening bolt E, and a 2mm adjustment space is left. By setting the pre-tightening plate 12, the pre-tightening force of the water seal can be directly controlled by the pre-tightening plate 12. During assembly, the material seal static ring 5 is directly pressed into the right end of the sealing gland without adjustment. After the mechanical seal is installed, it can be automatically adjusted into place by the large spring, avoiding the technical difficulty of adjustment required for seal installation. The pre-tightening plate 12 adopts a locking method with a firm bolt connection, which changes the original drawback of the retaining spring groove, in which the retaining spring easily jumps out of the groove, causing the seal to fail.

[0025] From the above description, it can be seen that under the action of the preload force of the large spring 8, the large spring 8 can push the push plate 7 to squeeze the static seal ring 5, so that the static seal ring 5 can be pressed tightly against the dynamic seal ring 4 to form a liquid film to seal the corn fermentation slurry.

[0026] The outer ring of the right end of the mechanical seal sleeve 1 is connected to a water seal dynamic ring 13. A water seal dynamic ring friction pair is embedded on the left side of water seal dynamic ring 13. A sealing gland is positioned between the material seal dynamic ring 4 and the water seal dynamic ring 13, and the water seal static ring 10 contacts the water seal dynamic ring 13. The water seal dynamic ring 13 is fixed to the mechanical seal sleeve 1 by process screws 15. A water seal dynamic ring O-ring 14 is positioned between the water seal dynamic ring 13 and the mechanical seal sleeve 1. The arrangement of the water seal dynamic ring 13 and the water seal static ring 10 forms a water seal structure. The two are compressed together by a large spring 8, forming a liquid film to seal the cooling water, acting as a cooling material seal and water seal. Furthermore, under the action of the large spring 8, the material seal structure and the water seal structure can compensate for each other, and the failure of one end will not affect the entire seal.

[0027] The inner diameters of the material seal static ring 5, the water seal static ring 10 and the push plate 7 are all larger than the outer diameter of the machine seal sleeve 1. A cooling cavity is formed between the sealing cover and the machine seal sleeve 1. A sealing cover water inlet hole G is provided at the bottom of the sealing cover, and an inclined sealing cover water outlet hole H is provided at the top of the sealing cover. The sealing cover water inlet hole G and the sealing cover water outlet hole H are connected through the cooling cavity, and the inner diameter of the sealing cover water inlet hole G is larger than the inner diameter of the sealing cover water outlet hole H. The sealing cover water outlet hole H is arranged obliquely above the water seal static ring 10. The sealing gland water outlet hole H and the sealing gland water inlet hole G are both connected to the outside. When the sealing cooling water is connected, the cooling water flows from the high-pressure area of ​​the water inlet hole to the low-pressure area of ​​the water outlet hole, which can take away the heat of the two friction pairs in the material seal structure on the left side of the cooling water hole and the trace leakage of corn slurry. At the same time, it can also take away the heat of the two friction pairs in the water seal structure on the right side of the cooling water hole. The trace leakage of slurry at the material seal end is directly carried out by the flow of cooling water and will not enter the water seal end. At the same time, it plays a role in protecting the material seal and water seal, significantly extending the service life of the mechanical seal.

[0028] The outer ring of the right end of the mechanical seal sleeve 1 is provided with a notched pre-tightening retaining ring groove 16, in which a retaining ring is provided. The retaining ring is tightly fitted to the side of the water seal dynamic ring 13 away from the sealing gland. Preferably, the notched pre-tightening retaining ring groove 16 is 3mm wide. By providing the retaining ring, all parts can be locked and not separated.

[0029] The left end of the mechanical seal sleeve 1 is provided with an O-ring 3A. When the mechanical seal is in use, the O-ring 3A is used to achieve sealing between the mechanical seal and the impeller of the corn fermentation slurry pump.

[0030] In summary: When the corn fermentation slurry pump is used with a container-type mechanical seal, the mechanical seal is fixed on the rotating shaft 21 of the corn fermentation slurry pump. During assembly, the material seal static ring 5 is directly pressed into the right end of the sealing cover. No adjustment is required. After the mechanical seal is installed, it can be automatically adjusted into place by the large spring, avoiding the technical difficulty of seal installation requiring adjustment. The corn fermentation slurry pump impeller 20 and the mechanical seal sleeve 1 are sealed by an O-ring triple A. Under the action of the rebound force of the large spring 8, the large spring 8 squeezes the push plate 7, and the push plate 7 squeezes the material seal static ring 5. The material seal static ring 5 can be pressed tightly against the material seal dynamic ring 4, and a liquid film can be formed between the material seal static ring 5 and the material seal dynamic ring 4 to seal the corn fermentation slurry; the water seal static ring 10 and the water seal dynamic ring 13 are pressed together by the large spring 8, and a liquid film is formed between the water seal static ring 10 and the water seal dynamic ring 13 to seal the cooling water, which plays the role of cooling the material seal and water seal. The material seal structure and the water seal structure of the mechanical seal can automatically adjust and compensate each other, avoiding the problem of one spring being used when the seal adopts a small spring. Failure will cause the adverse effect of overall sealing failure; when the sealing cooling water is connected, the cooling water flows from the high-pressure area of ​​the sealing cover water inlet hole G to the low-pressure area of ​​the sealing cover water outlet hole H, which can take away the heat of the two friction pairs in the material seal structure on the left side of the cooling water hole and the trace leakage of corn slurry. At the same time, it can also take away the heat of the two friction pairs in the water seal structure on the right side of the cooling water hole. The trace leakage of slurry at the material seal end is directly carried out by the flow of cooling water and will not enter the water seal end. At the same time, it plays a role in protecting the material seal structure and the water seal structure, significantly extending the service life of the mechanical seal.

[0031] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology and will not be described in detail here. The contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A container-type mechanical seal for a corn fermentation slurry pump, comprising a mechanical seal sleeve (1), characterized in that: The outer ring of the left end of the machine seal sleeve (1) is connected to a material seal dynamic ring (4), and the right side of the material seal dynamic ring (4) is inlaid with a material seal friction pair; the outer ring of the right end of the machine seal sleeve (1) is connected to a water seal dynamic ring (13), and the left side of the water seal dynamic ring (13) is inlaid with a water seal dynamic ring friction pair; the outside of the machine seal sleeve (1) is movably connected to a sealing gland, and the sealing gland is arranged between the material seal dynamic ring (4) and the water seal dynamic ring (13); the outer ring of the right end of the machine seal sleeve (1) is provided with a notch pre-tightening retaining ring groove (16), and a retaining ring is arranged in the notch pre-tightening retaining ring groove (16). The retaining ring The sealing gland is tightly fitted with a side of the water seal dynamic ring (13) away from the sealing gland; a material seal static ring (5) is sleeved on the left side of the sealing gland inner cavity, and the material seal static ring (5) is connected to the machine seal shaft sleeve (1) through the material seal static ring friction pair, and the material seal static ring (5) is in contact with the material seal dynamic ring (4); a water seal static ring (10) is sleeved on the right side of the sealing gland inner cavity, and the water seal static ring (10) is connected to the machine seal shaft sleeve (1) through the water seal static ring friction pair, and the water seal static ring (10) is in contact with the water seal dynamic ring (13); a large spring (8) is provided between the material seal static ring (5) and the water seal static ring (10) , the large spring (8) is movably sleeved on the machine seal sleeve (1), one end of the large spring (8) is fixed to the water seal static ring (10), and the other end of the large spring (8) contacts the material seal static ring (5) through the push plate (7); and the water seal static ring (10) is pre-tightened by the pre-tightening plate (12) installed on the right end of the sealing gland, and the pre-tightening plate (12) is connected to the right end of the sealing gland by the pre-tightening bolt (E), and a 2mm adjustment space is reserved; the sealing gland includes a gland body (17), a sealing plate (18) connected to the gland body (17) and a sealing plate (18) connected to the sealing plate (1 8) A pump cover (19) connected on the other side, the pump cover (19) is located on the side of the sealing pressure plate (18) close to the material seal dynamic ring (4), the sealing pressure plate (18) is connected to the material seal static ring (5), the right end of the material seal static ring (5) is sleeved inside the sealing pressure plate (18), and a gap of 3 mm is maintained between the left side of the sealing pressure plate (18) and the material seal static ring (5), the gland body (17) is connected to the water seal static ring (10); the bottom of the sealing gland is provided with a sealing gland water inlet hole (G), and the top of the sealing gland is provided with an inclined sealing gland water outlet hole (H).

2. The cartridge mechanical seal for a corn fermentation slurry pump according to claim 1, characterized in that: A material seal dynamic ring O-ring (2) is provided between the material seal dynamic ring (4) and the machine seal shaft sleeve (1), and the material seal dynamic ring (4) is connected to the machine seal shaft sleeve (1) via a material seal anti-rotation pin (3).

3. The cartridge mechanical seal for a corn fermentation slurry pump according to claim 2, characterized in that: There are two material seal dynamic ring O-rings (2), and the two material seal dynamic ring O-rings (2) are arranged in parallel between the material seal dynamic ring (4) and the machine seal shaft sleeve (1).

4. The cartridge mechanical seal for a corn fermentation slurry pump according to claim 1, characterized in that: A material seal static ring O-ring (6) is provided between the material seal static ring (5) and the sealing pressure plate (18), an O-ring 1 (B) is provided between the gland body (17) and the sealing pressure plate (18), an O-ring 2 (C) is provided between the sealing pressure plate (18) and the pump cover (19), a water seal static ring O-ring (11) is provided between the water seal static ring (10) and the gland body (17), and the water seal static ring (10) is connected to the gland body (17) via a water seal static ring anti-rotation pin (9).

5. The cartridge mechanical seal for a corn fermentation slurry pump according to claim 4, characterized in that: The inner diameters of the material seal static ring (5), the water seal static ring (10) and the push plate (7) are all larger than the outer diameter of the machine seal shaft sleeve (1); a cooling cavity is formed between the sealing gland and the machine seal shaft sleeve (1); and the sealing gland water inlet hole (G) and the sealing gland water outlet hole (H) are connected through the cooling cavity.

6. The cartridge mechanical seal for a corn fermentation slurry pump according to claim 1, characterized in that: The water seal dynamic ring (13) is fixedly mounted on the machine seal shaft sleeve (1) via process screws (15), and a water seal dynamic ring O-ring (14) is provided between the water seal dynamic ring (13) and the machine seal shaft sleeve (1).

7. The cartridge mechanical seal for a corn fermentation slurry pump according to claim 5, characterized in that: The gland body (17), the sealing pressure plate (18) and the pump cover (19) are connected by fixing bolts (D); the inner diameter of the sealing gland water inlet hole (G) is larger than the inner diameter of the sealing gland water outlet hole (H), and the sealing gland water outlet hole (H) is arranged obliquely above the water seal static ring (10).

8. The cartridge mechanical seal for a corn fermentation slurry pump according to claim 5, characterized in that: An O-ring three (A) is provided at the left end of the mechanical seal sleeve (1).

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