Flushing-free mechanical seal of slurry pump

Abstract

The utility model discloses a slurry pump washing-free mechanical seal which comprises a mechanical seal seat, a mechanical seal inner sleeve is arranged in the mechanical seal seat, a sealing moving ring and a sealing static ring are arranged between the mechanical seal seat and the mechanical seal inner sleeve, and the sealing moving ring and the sealing static ring are of an inverted structure. An engine oil chamber is arranged on the side, away from the sealing movable ring, of the sealing static ring and used for providing engine oil into the mechanical seal. According to the utility model, the functionality and the service life of sealing equipment can be improved under the condition of no washing.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, and in particular to a slurry pump flush-free mechanical seal. Background Technology

[0002] Slurry pumps play a vital role in industrial production and many other fields. They are widely used in mining, power, metallurgy, coal, and chemical industries, primarily for conveying slurries containing solid particles. With the continuous development of these industries, the requirements for the performance and reliability of slurry pumps are becoming increasingly stringent. The stable operation of slurry pumps directly affects the smoothness of the entire production process, playing an indispensable role in improving production efficiency and reducing production costs. Furthermore, advancements in slurry pump technology also contribute to driving related industries towards greater efficiency and environmental friendliness.

[0003] Currently, in the field of slurry pumps, to ensure the normal operation of mechanical seals, traditional slurry pumps generally employ flushing water systems, primarily divided into external flushing and internal flushing. In this method, tap water is typically used for flushing. External flushing introduces flushing water from the outside into the mechanical seal area, while internal flushing utilizes the pump's internal pressure to deliver flushing water to the seal. This flushing method serves to cool, lubricate, and prevent impurities from entering the sealing surface, thereby ensuring the normal operation of the mechanical seal.

[0004] However, existing mechanical seals with flushing water have significant drawbacks. The flushing water requires specific flow rates and pressures; problems with the flushing water, such as insufficient flow or unstable pressure, can easily damage the mechanical seal. Damage to the mechanical seal directly affects the normal operation of the slurry pump, and may even cause equipment failure, thus impacting the entire production process. Utility Model Content

[0005] This application provides a slurry pump flush-free mechanical seal, which facilitates the improvement of the functionality and lifespan of the sealing equipment without flushing.

[0006] This application provides a flush-free mechanical seal for a slurry pump, employing the following technical solution:

[0007] A slurry pump flush-free mechanical seal includes a mechanical seal seat, an inner mechanical seal sleeve inside the mechanical seal seat, a dynamic sealing ring and a stationary sealing ring between the mechanical seal seat and the inner mechanical seal sleeve, the dynamic sealing ring and the stationary sealing ring having an inverted structure, and an oil chamber provided on the side of the stationary sealing ring away from the dynamic sealing ring, the oil chamber being used to supply oil to the mechanical seal.

[0008] By adopting the above technical solution, this utility model designs a slurry pump flush-free mechanical seal. During use, it eliminates the need for flushing water, avoiding damage to the mechanical seal caused by flushing water. The inverted structure of the sealing rings (dynamic and stationary) adapts to the complex operating conditions of the slurry pump. The oil chamber supplies oil to the mechanical seal for lubrication.

[0009] Preferably, the sealing dynamic ring is fixed to the outer circumferential surface of the mechanical seal inner sleeve, and the sealing stationary ring is embedded in the inner wall of the mechanical seal seat.

[0010] By adopting the above technical solution, when in use, fixing the sealing dynamic ring to the outer circumference of the mechanical seal inner sleeve and embedding the sealing stationary ring in the inner wall of the mechanical seal seat can ensure that the positions of both are stable and guarantee the normal operation of the mechanical seal.

[0011] Preferably, a sealing compression spring is provided between the end of the sealing stationary ring away from the sealing moving ring and the oil chamber, and the sealing compression spring applies elastic pressure to the sealing stationary ring along the axial direction.

[0012] By adopting the above technical solution, during use, the sealing compression spring applies elastic pressure to the sealing stationary ring along the axial direction, which can ensure that the sealing stationary ring and the sealing dynamic ring fit tightly together and improve the sealing performance.

[0013] Preferably, the inner sleeve of the mechanical seal is further provided with an inner sleeve fixing ring, which is fixed to the inner sleeve of the mechanical seal by a clamping screw.

[0014] By adopting the above technical solution, during use, the inner sleeve retaining ring is fixed to the mechanical seal inner sleeve by the clamping screw, which makes the mechanical seal inner sleeve structure more stable and ensures the stability of the mechanical seal.

[0015] Preferably, the oil chamber is filled with lubricating oil.

[0016] By adopting the above technical solution, the oil chamber is filled with lubricating oil during use, which can prevent the mechanical seal from being damaged by flushing water. At the same time, the lubricating oil can lubricate the mechanical seal, meeting the usage requirements and life requirements of the slurry pump mechanical seal.

[0017] Preferably, the mechanical seal seat is provided with an oil replenishment port, which penetrates the mechanical seal seat and is connected to an external oiling device.

[0018] By adopting the above technical solution, during use, the mechanical seal seat is equipped with an oil replenishment port that runs through and connects to an external oiling device, allowing for timely replenishment of oil and ensuring that the mechanical seal continuously receives good lubrication and protection.

[0019] In summary, this application has the following beneficial effects:

[0020] 1. This utility model designs a slurry pump flush-free mechanical seal, eliminating the need for flushing water and avoiding damage to the mechanical seal due to issues with the amount and pressure of flushing water, thus ensuring the normal operation of the slurry pump;

[0021] 2. The present invention relates to a slurry pump anti-flushing mechanical seal, wherein the dynamic ring and stationary ring adopt an inverted structure, and the stationary ring chamber is configured as a combination of a spring assembly and an oil chamber. Oil is supplied to the mechanical seal through the oil chamber, thereby achieving the anti-flushing function. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0023] Explanation of reference numerals in the attached diagram: 1. Mechanical seal seat; 2. Mechanical seal inner sleeve; 3. Seal rotating ring; 4. Seal stationary ring; 5. Oil chamber; 6. Seal compression spring; 7. Inner sleeve retaining ring; 8. Compression screw; 9. Oil filler port. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "bottom," and "top" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0025] This utility model discloses a slurry pump flush-free mechanical seal, such as... Figure 1 As shown, the mechanical seal includes a mechanical seal seat 1, a mechanical seal inner sleeve 2, a rotating sealing ring 3, a stationary sealing ring 4, and an oil chamber 5. The mechanical seal inner sleeve 2 is housed within the mechanical seal seat 1. The rotating sealing ring 3 and the stationary sealing ring 4 are positioned between the mechanical seal seat 1 and the mechanical seal inner sleeve 2, and are in an inverted configuration. The oil chamber 5 is located on the side of the stationary sealing ring 4 furthest from the rotating sealing ring 3, and is used to supply oil to the mechanical seal. This avoids the problems associated with using flushing water, effectively improving the stability and service life of the mechanical seal. Traditional mechanical seals with flushing water are susceptible to the influence of flushing water volume and pressure. This design eliminates flushing water, using oil for lubrication and cooling, reducing the likelihood of malfunctions.

[0026] Specifically, the mechanical seal seat 1 is the external support structure of the entire mechanical seal, usually made of metal materials such as cast iron or stainless steel. High-strength engineering plastics can also be used, as long as they meet the support and sealing requirements. The mechanical seal seat 1 is equipped with an oil filler port 9, which penetrates the mechanical seal seat 1 and connects to an external oiling device. Its function is to facilitate the replenishment of oil into the oil chamber 5. The oil filler port 9 can be a simple circular hole or it can have a threaded interface for better connection with the external oiling device.

[0027] The inner sleeve 2 of the mechanical seal is located inside the mechanical seal base 1. It is generally also a cylindrical structure, and its material can be the same as that of the mechanical seal base 1, or other suitable materials can be selected according to actual needs. The inner sleeve 2 also has an inner sleeve retaining ring 7, which is fixed to the inner sleeve 2 by a clamping screw 8. The inner sleeve retaining ring 7 is usually annular, made of metal or plastic, and its function is to fix the position of the inner sleeve 2 and prevent it from shifting during operation. The clamping screw 8 is generally a common bolt; tightening the bolt firmly presses the inner sleeve retaining ring 7 onto the inner sleeve 2, thus securing the two together.

[0028] During operation, the rotating sealing ring 3 is fixed to the rotating shaft of the slurry pump. It is typically annular with a smooth surface, and can be made of wear-resistant materials such as hard alloys or ceramics. Alternatively, a specially coated metal material can be used to enhance wear resistance. The precision and surface flatness of the rotating sealing ring 3 are crucial for the sealing effect. The stationary sealing ring 4 is embedded in the inner wall of the mechanical seal seat 1. It is also annular in shape and made of a similar material to the rotating sealing ring 3, requiring good wear resistance and sealing performance. The rotating sealing ring 3 and the stationary sealing ring 4 are inverted. This inverted structure changes the traditional sealing method, making the seal more reliable and better adaptable to the complex operating conditions of the slurry pump.

[0029] A sealing spring 6 is installed between the end of the stationary sealing ring 4 furthest from the rotating sealing ring 3 and the oil chamber 5. The sealing spring 6 applies elastic pressure to the stationary sealing ring 4 axially, causing the stationary sealing ring 4 to fit tightly against the rotating sealing ring 3 under the action of the sealing spring 6, forming a sealing surface. When the sealing surface is worn, the sealing spring 6 can automatically compensate to maintain the sealing performance.

[0030] The oil chamber 5 is used to supply oil to the mechanical seal. It is located on the side of the stationary sealing ring 4 away from the rotating sealing ring 3. The oil chamber 5 is filled with lubricating oil, which serves to lubricate and cool the seal, replacing traditional flushing water. Different types of oil, such as mineral oil and synthetic oil, can be selected based on the specific working environment and requirements. The oil chamber 5 can be a separate cavity or integrally formed with the mechanical seal seat 1. Its size and shape should be designed according to actual needs to ensure a sufficient oil supply.

[0031] Working Principle: This slurry pump's flush-free mechanical seal utilizes a unique inverted design for the sealing dynamic ring 3 and sealing stationary ring 4, along with oil lubrication and cooling provided by the oil chamber 5, eliminating the need for traditional flushing water. This avoids mechanical seal damage caused by issues with flushing water volume and pressure, improving the stability and reliability of the mechanical seal. Simultaneously, the sealing compression spring 6 ensures tight contact and automatic compensation of the sealing surfaces, while the inner retaining ring 7 fixes the position of the inner sleeve 2, further enhancing the overall performance of the mechanical seal, extending its service life, reducing equipment failures and maintenance costs, and making a significant improvement and contribution to existing slurry pump mechanical seal technology.

[0032] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A slurry pump flush-free mechanical seal, characterized in that: The mechanical seal includes a mechanical seal seat (1), a mechanical seal inner sleeve (2) is provided inside the mechanical seal seat (1), a sealing dynamic ring (3) and a sealing stationary ring (4) are provided between the mechanical seal seat (1) and the mechanical seal inner sleeve (2), the sealing dynamic ring (3) and the sealing stationary ring (4) are in an inverted structure, and an oil chamber (5) is provided on the side of the sealing stationary ring (4) away from the sealing dynamic ring (3), the oil chamber (5) is used to supply oil to the mechanical seal.

2. The slurry pump flush-free mechanical seal according to claim 1, characterized in that: The sealing dynamic ring (3) is fixed to the outer circumferential surface of the mechanical seal inner sleeve (2), and the sealing stationary ring (4) is embedded in the inner wall of the mechanical seal seat (1).

3. The slurry pump flush-free mechanical seal according to claim 1, characterized in that: A sealing compression spring (6) is provided between the end of the sealing stationary ring (4) away from the sealing moving ring (3) and the oil chamber (5), and the sealing compression spring (6) applies elastic pressure to the sealing stationary ring (4) along the axial direction.

4. The slurry pump flush-free mechanical seal according to claim 1, characterized in that: The inner sleeve of the mechanical seal (2) is also provided with an inner sleeve fixing ring (7), which is fixed to the inner sleeve of the mechanical seal (2) by a clamping screw (8).

5. The slurry pump flush-free mechanical seal according to claim 1, characterized in that: The oil chamber (5) is filled with lubricating oil.

6. The slurry pump flush-free mechanical seal according to claim 1, characterized in that: The machine seal seat (1) is provided with an oil replenishment port (9), which penetrates the machine seal seat (1) and is connected to an external refueling device.

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