Cooling device for mechanical seal

Abstract

The utility model relates to the technical field of hot-rolled plate rolling roller cooling water pump mechanical seal, and discloses a mechanical seal cooling device which comprises a pump shaft, a mechanical seal moving ring, a mechanical seal static ring and a mechanical seal gland, two through holes are formed in the mechanical seal gland, and the mechanical seal gland is respectively connected with a water inlet pipe and a water outlet pipe in a flexible connection mode. And the water inlet pipe and the water outlet pipe are respectively communicated with the contact surfaces of the mechanical seal moving ring and the mechanical seal static ring through the two through holes. The hole is formed in the mechanical seal gland, clean circulating water is introduced through soft connection, the contact face of the mechanical seal moving ring and the mechanical seal static ring is directly cooled, friction heat can be effectively taken away, high-temperature damage is reduced, meanwhile, a water film is formed, abrasion is reduced, impurities are blocked, and the service life of the mechanical seal is prolonged. The use of the clean circulating water avoids blockage and abrasion caused by impurities, the maintenance cost and strength are reduced, the flexible connection design ensures stable water supply, the sealing performance and the equipment operation reliability are improved by matching the pressing effect of the spring on the sealing surface, and the stable operation of a production line is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical seal technology for cooling water pumps of hot-rolled coil rolls, specifically, it relates to a cooling device for a mechanical seal. Background Technology

[0002] In the hot-rolled coil production process of the steel industry, the roll cooling water pump is a key piece of equipment to ensure the normal operation of the rolling line. The reliability of its mechanical seal directly affects the pump's operating efficiency and service life. The cooling water system of hot-rolled coils typically follows a circulation process of "water tank - water pump - rolling line cooling - slag flushing ditch - primary settling tank - chemical degreasing device - cooling tower - water tank". In this process, the pump's mechanical seal needs to form a tight seal between the contact surfaces of the rotating moving ring and the non-rotating stationary ring under fluid pressure to achieve the sealing function.

[0003] However, current water pump mechanical seals do not employ reliable physical cooling measures during operation, or their cooling methods are limited. When the dynamic and static rings of the mechanical seal rotate relative to each other at high speed, the contact surface will generate a large amount of heat due to friction. If there is a lack of effective cooling, the sealing components are prone to damage and deformation due to excessive temperature, which directly leads to a decrease in sealing performance. At the same time, the high temperature environment will accelerate the wear of the contact surface and significantly shorten the service life of the mechanical seal.

[0004] In view of this, this utility model is proposed. Utility Model Content

[0005] To address the problem that current water pump mechanical seals lack reliable physical cooling measures or have limited cooling methods during operation, resulting in significant heat generation due to friction at the contact surface between the rotating and stationary rings during high-speed relative rotation, and the risk of damage and deformation of the sealing components due to excessive temperature if effective cooling is lacking, directly leading to a decline in sealing performance. Furthermore, high-temperature environments accelerate wear on the contact surfaces, significantly shortening the service life of the mechanical seal. The basic concept of this utility model is as follows:

[0006] A cooling device for a mechanical seal includes a pump shaft, a rotating mechanical seal ring, a stationary mechanical seal ring, and a mechanical seal cover. The mechanical seal cover has two through holes on its side wall. An inlet pipe and an outlet pipe are connected to the mechanical seal cover via flexible connections. The inlet pipe and the outlet pipe are connected to the contact surfaces of the rotating mechanical seal ring and the stationary mechanical seal ring through the two through holes.

[0007] In a preferred embodiment of this utility model, the water inlet pipe extends through a corresponding through hole to the contact surface between the mechanical seal moving ring and the mechanical seal stationary ring.

[0008] In a preferred embodiment of this utility model, the water outlet pipe extends through a corresponding through hole to the other side of the contact surface between the mechanical seal moving ring and the mechanical seal stationary ring.

[0009] In a preferred embodiment of this utility model, the mechanical seal moving ring is sleeved on the pump shaft, the mechanical seal stationary ring is matched with the mechanical seal gland, and the contact surfaces of the mechanical seal moving ring and the mechanical seal stationary ring are arranged opposite to each other.

[0010] In a preferred embodiment of this utility model, the cooling water transported by the inlet pipe and the outlet pipe is a clean circulating water, and the flexible connection between the inlet pipe and the outlet pipe is a pipe connection structure with bendable characteristics.

[0011] In a preferred embodiment of the present invention, a positioning ring is mounted on the pump shaft, and a spring is provided between the positioning ring and the mechanical seal moving ring, which can apply a force toward the mechanical seal stationary ring to the mechanical seal moving ring.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] This invention introduces clean circulating water through an opening in the mechanical seal gland and a flexible connection, directly cooling the contact surface between the rotating and stationary rings of the mechanical seal. This effectively removes frictional heat, reduces high-temperature damage, and forms a water film to reduce wear and block impurities, extending the service life of the mechanical seal. The use of clean circulating water avoids blockage and wear caused by impurities, reducing maintenance costs and intensity. The flexible connection design ensures stable water supply, and the spring's pressing action on the sealing surface improves sealing performance and equipment reliability, facilitating stable operation of the production line.

[0014] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0015] In the attached diagram:

[0016] Figure 1 A three-dimensional diagram of a cooling device for a mechanical seal;

[0017] Figure 2 A cross-sectional view of a cooling device for a mechanical seal;

[0018] Figure 3 A cooling device for a mechanical seal Figure 2 Enlarged view of point A in the middle.

[0019] In the diagram: 1. Pump shaft; 2. Positioning ring; 3. Spring; 4. Mechanical seal moving ring; 5. Mechanical seal stationary ring; 6. Mechanical seal gland; 7. Through hole; 8. Inlet pipe; 9. Outlet pipe. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0021] like Figures 1 to 3 As shown, a cooling device for a mechanical seal includes a pump shaft 1, a rotating mechanical seal ring 4, a stationary mechanical seal ring 5, and a mechanical seal gland 6. The mechanical seal gland 6 has two through holes 7 on its side wall. An inlet pipe 8 and an outlet pipe 9 are connected to the mechanical seal gland 6 via flexible connections. The inlet pipe 8 and outlet pipe 9 are connected to the contact surfaces of the rotating mechanical seal ring 4 and the stationary mechanical seal ring 5 through the two through holes 7. In this configuration, the mechanical seal gland 6 serves as the basic installation structure. The through holes 7 provide channels for the inlet pipe 8 and outlet pipe 9 to reach the sealing surface. The flexible connections enable a flexible connection between the inlet and outlet pipes and the mechanical seal gland 6, ensuring that the pipelines can stably connect to the through holes 7 and deliver and discharge the medium to the sealing surface.

[0022] like Figures 1 to 3 As shown, in a specific embodiment, the water inlet pipe 8 extends through the corresponding through hole 7 to the contact surface between the mechanical seal moving ring 4 and the mechanical seal stationary ring 5. In this configuration, the extension path of the water inlet pipe 8 directly points to the sealing surface, which can accurately deliver cooling water to the friction area, ensuring that the cooling medium can directly act on the heat-generating core part and improve the cooling efficiency.

[0023] like Figures 1 to 3 As shown, the outlet pipe 9 extends through the corresponding through hole 7 to the other side of the contact surface between the mechanical seal moving ring 4 and the mechanical seal stationary ring 5. In this configuration, the outlet pipe 9 and the inlet pipe 8 are located on both sides of the sealing surface, forming a complete water circulation path, so that the cooling water after heat absorption can be discharged in time, avoiding accumulation in the sealing area and affecting the heat dissipation effect.

[0024] like Figures 1 to 3 As shown, the mechanical seal rotating ring 4 is fitted onto the pump shaft 1, and the mechanical seal stationary ring 5 mates with the mechanical seal gland 6, with the contact surfaces of the rotating ring 4 and the stationary ring 5 facing each other. In this configuration, the mechanical seal rotating ring 4 rotates synchronously with the pump shaft 1, and the mechanical seal stationary ring 5 is kept fixed by its mating with the mechanical seal gland 6. The opposing contact surfaces of the two form a sealing pair, providing a basic sealing structure for the mechanical seal.

[0025] like Figures 1 to 3 As shown, the cooling water transported by the inlet pipe 8 and the outlet pipe 9 is clean circulating water, and the flexible connection between the inlet pipe 8 and the outlet pipe 9 is a pipe connection structure with flexible characteristics. In this configuration, the clean circulating water can reduce the wear of impurities on the sealing surface, and the flexible connection can adapt to slight vibrations or displacements during device operation, avoiding damage to the pipe due to stress caused by rigid connection, and ensuring the stability of water supply.

[0026] like Figures 1 to 3As shown, a positioning ring 2 is further mounted on the pump shaft 1, and a spring 3 is provided between the positioning ring 2 and the mechanical seal moving ring 4, which can apply a force toward the mechanical seal stationary ring 5 to the mechanical seal moving ring 4. In this configuration, the positioning ring 2 provides axial restraint to the spring 3, and the elastic force of the spring 3 continuously pushes the mechanical seal moving ring 4 to fit against the mechanical seal stationary ring 5, ensuring that the sealing surfaces of the two are always in close contact and maintaining the sealing effect.

[0027] The implementation principle of the cooling device for a mechanical seal in this embodiment is as follows: When the device is working, the inlet pipe 8 continuously delivers clean circulating water to the contact surface between the mechanical seal moving ring 4 and the mechanical seal stationary ring 5 through the through hole 7 on the side wall of the mechanical seal cover 6. This part of the cooling water directly acts on the friction surface. On the one hand, it carries away the heat generated by the relative motion of the two through the flow, avoiding damage or deformation of the sealing components due to high temperature. On the other hand, it forms a water film between the contact surfaces, reducing friction loss and blocking external impurities from entering, protecting the sealing surface. After completing the heat exchange and protection functions, the cooling water is discharged through the through hole 7 on the other side and discharged through the outlet pipe 9, forming a continuous cooling cycle. In addition, the positioning ring 2 on the pump shaft 1 plays a limiting role on the spring 3. The spring 3 applies a force towards the mechanical seal stationary ring 5 to the mechanical seal moving ring 4, ensuring that the sealing surfaces of the two are always in close contact. Together with the water film formed by the cooling water, it ensures the good sealing performance of the mechanical seal and extends its service life. The inlet pipe 8 and the outlet pipe 9 adopt a flexible connection, which can adapt to slight displacement during the operation of the device and ensure the stability of the water supply.

Claims

1. A mechanically sealed cooling device comprising a pump shaft (1), a mechanical seal runner (4), a mechanical seal stator (5) and a mechanical seal gland (6), characterized in that The mechanical seal cover (6) has two through holes (7) on its side wall. The mechanical seal cover (6) is connected to an inlet pipe (8) and an outlet pipe (9) respectively via flexible connections. The inlet pipe (8) and the outlet pipe (9) are connected to the contact surfaces of the mechanical seal moving ring (4) and the mechanical seal stationary ring (5) respectively through the two through holes (7).

2. A cooling device for a mechanical seal according to claim 1, characterized in that The water inlet pipe (8) extends through the corresponding through hole (7) to the contact surface between the mechanical seal moving ring (4) and the mechanical seal stationary ring (5).

3. A cooling device for a mechanical seal according to claim 1, characterized in that The water outlet pipe (9) extends through the corresponding through hole (7) to the other side of the contact surface between the mechanical seal moving ring (4) and the mechanical seal stationary ring (5).

4. A cooling device for a mechanical seal according to claim 1, characterized in that The mechanical seal moving ring (4) is sleeved on the pump shaft (1), the mechanical seal stationary ring (5) is matched with the mechanical seal cover (6), and the contact surfaces of the mechanical seal moving ring (4) and the mechanical seal stationary ring (5) are arranged opposite to each other.

5. A cooling device for a mechanical seal according to claim 1, wherein The cooling water transported by the inlet pipe (8) and outlet pipe (9) is a clean circulating water, and the flexible connection of the inlet pipe (8) and outlet pipe (9) is a pipe connection structure with bendable characteristics.

6. A cooling device for a mechanical seal according to claim 1, characterized in that A positioning ring (2) is mounted on the pump shaft (1), and a spring (3) is provided between the positioning ring (2) and the mechanical seal moving ring (4) to apply a force toward the mechanical seal stationary ring (5) to the mechanical seal moving ring (4).

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