WB2 type mechanical sealing structure

Abstract

The utility model provides a WB2 type mechanical sealing structure which comprises a static sealing ring connected with a pump; the movable sealing ring is arranged on a rotating shaft of the pump in a sleeving mode, the movable sealing ring rotates along with the rotating shaft, and relative movement sealing between the movable sealing ring and the static sealing ring is achieved; the lantern ring is arranged on the static sealing ring and the movable sealing ring in a sleeving manner; the end cover is arranged on the side, away from the static sealing ring, of the movable sealing ring in a covering mode, gaps are formed among the static sealing ring, the movable sealing ring, the lantern ring and the end cover so that fluid can circulate in the gaps, heat exchange, cleaning and lubrication can be conducted on the static sealing ring and the movable sealing ring, a shaft hole is formed in the end cover, and a rotating shaft of the pump penetrates through the shaft hole. According to the WB2 type mechanical sealing structure, the technical problems that in the related technology, due to the fact that the temperature of a WB2 type mechanical seal is too high in the high-speed operation environment, the dynamic and static sealing rings are seriously abraded, and frequent replacement is needed are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of WB2 type mechanical seals, and specifically relates to a WB2 type mechanical seal structure. Background Art

[0002] A mechanical seal is one of the key components of a pump, and it is a device used to prevent the leakage of the pump. A mechanical seal usually consists of two main parts: a stationary seal ring and a rotating seal ring. When the pump is running, a sealed space is formed between the stationary seal ring and the rotating seal ring, thereby preventing the leakage of the pump.

[0003] A mechanical seal seals by relying on the close contact between the stationary and rotating seal rings. During high-speed operation, the contact surfaces between the stationary and rotating seal rings will rub against each other to generate heat, resulting in high temperatures. This high temperature will damage the liquid film between the contact surfaces, and the liquid film is a key factor for the stable operation and extended service life of the mechanical seal. When the liquid film is damaged, dry friction will occur between the stationary and rotating seal rings, leading to increased heat generation and wear of the contact surfaces, and further causing leakage. In severe cases, it may even burn out the contact surfaces and cause the seal to fail.

[0004] After multiple detections and studies, in a high-speed operating environment, a set of WB2 type mechanical seals shows the phenomenon of medium leakage caused by wear of the seal surface after only about 5 days of use, and it is necessary to regularly and frequently replace the mechanical seal parts.

[0005] Therefore, the existing technology needs to be further developed. Content of the Utility Model

[0006] The purpose of the utility model is to overcome the above technical deficiencies and provide a WB2 type mechanical seal structure to solve the technical problem that in the related technology, the stationary and rotating seal rings of the WB2 type mechanical seal are severely worn due to excessive temperature in a high-speed operating environment, and need to be frequently replaced.

[0007] To achieve the above technical purpose, the utility model adopts the following technical solutions: A WB2 type mechanical seal structure is provided, including: a stationary seal ring, which is connected to the pump; a rotating seal ring, which is sleeved on the rotating shaft of the pump, and the rotating seal ring rotates with the rotating shaft to achieve relative motion sealing with the stationary seal ring; a collar, which is sleeved on the stationary seal ring and the rotating seal ring; an end cover, which is covered on the side of the rotating seal ring away from the stationary seal ring. There is a gap between the stationary seal ring, the rotating seal ring, the collar and the end cover, so that fluid can flow in the gap, thereby performing heat exchange, cleaning and lubrication on the stationary seal ring and the rotating seal ring. An axial hole is provided on the end cover, and the rotating shaft of the pump passes through the axial hole.

[0008] Further, the collar is provided with an inlet and an outlet, both of which are communicated with the gap. The fluid enters the gap through the inlet, and after performing heat exchange, cleaning and lubrication in the gap, it then flows out through the outlet.

[0009] Further, a communication groove is provided on the collar. One end of the communication groove is connected to the inlet, and the other end of the communication groove extends into the gap to guide the fluid flow to the connection between the static seal ring and the dynamic seal ring through the communication groove.

[0010] Further, the diameter of the communication groove is smaller than the diameter of the outlet.

[0011] Further, the inlet and the outlet are oppositely arranged on the collar so that the distance between the inlet and the outlet is maximized, thereby increasing the fluid flow path.

[0012] Further, there are multiple inlets, and the inlets are arranged on the collar at intervals; and / or, there are multiple outlets, and the outlets are arranged on the collar at intervals.

[0013] Further, a receiving groove is also provided on the end cover. The receiving groove communicates with the shaft hole, and the shaft hole, the receiving groove and the rotating shaft of the pump are coaxially arranged. The WB2 type mechanical seal structure further includes a felt. The felt is arranged in the receiving groove. When the dynamic seal ring rotates together with the rotating shaft of the pump, the felt surrounds the rotating shaft of the pump to block the gap.

[0014] Further, a gland is provided on the side of the static seal ring away from the dynamic seal ring, and the static seal ring is connected to the pump through the gland.

[0015] Further, the WB2 type mechanical seal structure further includes fasteners and through holes. The through holes respectively penetrate through the end cover and the collar so that the fasteners pass through the through holes to fix the end cover and the collar on the gland.

[0016] Further, there are multiple through holes, and the through holes are arranged on the end cover and the collar at intervals around the rotating shaft of the pump.

[0017] Advantageous effects:

[0018] 1. For the WB2 type mechanical seal structure of the present utility model, by sleeving a collar and an end cover on the outer circumferences of the static seal ring and the dynamic seal ring, and providing a gap between the static seal ring, the dynamic seal ring, the collar and the end cover, the cooling fluid circulates in the gap, realizing heat exchange between the static seal ring and the dynamic seal ring, greatly reducing the frictional heat generated by high-speed operation, avoiding the occurrence of liquid film damage and dry friction, thereby reducing wear, extending the service life of the seal, and reducing the use cost.

[0019] 2. For the WB2 type mechanical seal structure of the present utility model, the fluid in the gap not only plays a role in heat exchange, but also can clean and lubricate the sealing surface, further reducing the wear caused by impurity accumulation and insufficient lubrication, and improving the reliability and stability of the seal.

[0020] 3. The WB2 mechanical seal structure of the present utility model optimizes the fluid flow path by setting an inlet, an outlet, and a communication groove. In particular, the design of the communication groove can guide the fluid directly to the key area of the sealing surface, improving the heat transfer and lubrication effects.

[0021] 4. In the WB2 mechanical seal structure of the present utility model, the accommodation groove and felt on the end cover effectively block the gap and prevent fluid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a cross-sectional view of the WB2 mechanical seal structure adopted in the embodiment of the present utility model;

[0023] Figure 2 is Figure 1 a partial enlarged view of part A in

[0024] Figure 3 is a top view of the end cover of the WB2 mechanical seal structure adopted in the embodiment of the present utility model.

[0025] Among them, the above-mentioned drawings include the following reference numerals:

[0026] 1. Static seal ring; 11. Gland; 2. Dynamic seal ring; 3. Collar; 31. Inlet; 32. Outlet; 33. Communication groove; 4. End cover; 41. Shaft hole; 42. Accommodation groove; 5. Gap; 6. Perforation. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0028] According to an embodiment of the present utility model, a WB2 mechanical seal structure is provided. Please refer to Figures 1 to 3, including: a static seal ring 1, which is connected to the pump; a dynamic seal ring 2, which is sleeved on the rotating shaft of the pump, and the dynamic seal ring 2 rotates with the rotating shaft to achieve relative motion sealing with the static seal ring 1; a collar 3, which is sleeved on the static seal ring 1 and the dynamic seal ring 2; an end cover 4, which is covered on the side of the dynamic seal ring 2 away from the static seal ring 1. There is a gap 5 between the static seal ring 1, the dynamic seal ring 2, the collar 3 and the end cover 4, so that the fluid can flow in the gap 5, thereby exchanging heat, cleaning and lubricating the static seal ring 1 and the dynamic seal ring 2. There is a shaft hole 41 on the end cover 4, and the rotating shaft of the pump passes through the shaft hole 41. This research is based on the WB2 type mechanical seal, so the structural improvement also targets the WB2 type mechanical seal. The fluid flows in the gap 5 between the static seal ring 1, the dynamic seal ring 2, the collar 3 and the end cover 4, effectively taking away the heat generated by high-speed rotation, thereby preventing the seal ring from being damaged due to overheating and ensuring the long-term stable operation of the seal. The fluid can be a cooling fluid or a fluid with cleaning and lubricating functions. Due to reducing the wear caused by high temperature, impurity accumulation and insufficient lubrication, this mechanical seal structure significantly extends the service life of the mechanical seal. This not only reduces the frequency of replacing the mechanical seal, but also reduces the maintenance cost and improves the overall economic efficiency of the equipment. The WB2 type mechanical seal structure of this embodiment solves the technical problem that in the related art, the static and dynamic seal rings of the WB2 type mechanical seal are severely worn due to excessive temperature in a high-speed operating environment and need to be replaced frequently.

[0029] Refer to Figure 1 , for the WB2 type mechanical seal structure of this embodiment, there are an inlet 31 and an outlet 32 on the collar 3, both the inlet 31 and the outlet 32 are communicated with the gap 5, the fluid enters the gap 5 through the inlet 31, and after exchanging heat, cleaning and lubricating in the gap 5, it then flows out from the outlet 32. After the fluid enters the gap 5 through the inlet 31, it can directly contact the heat generated by high-speed rotation, effectively taking away the heat and discharging it through the outlet 32. During the process of the fluid circulating in the gap 5, it not only takes away the heat, but also plays a role in cleaning and lubricating.

[0030] Refer to Figure 1 and Figure 2, for the WB2 type mechanical seal structure of this embodiment, a communication groove 33 is further provided on the collar 3. One end of the communication groove 33 is connected to the inlet 31, and the other end of the communication groove 33 extends into the gap 5 to guide the fluid flow to the connection between the stationary seal ring 1 and the dynamic seal ring 2 through the communication groove 33. The design of the communication groove 33 enables the fluid to flow more directly and effectively to the contact surface between the stationary seal ring 1 and the dynamic seal ring 2, that is, the position where the liquid film is located. The fluid acts directly on the liquid film area through the communication groove 33, which can more quickly carry away the heat generated by friction and improve the heat exchange efficiency. This helps to reduce the working temperature of the seal ring and reduce the risk of wear and failure caused by overheating.

[0031] Refer to Figure 1 and Figure 2 , for the WB2 type mechanical seal structure of this embodiment, the diameter of the communication groove 33 is smaller than the diameter of the outlet 32. Due to the smaller diameter of the communication groove 33, when the fluid enters from the inlet 31 and passes through the communication groove 33, the flow cross-section of the fluid decreases, the flow velocity of the fluid in the communication groove 33 will increase, and the corresponding static pressure will decrease. However, when the fluid enters the gap 5 from the communication groove 33, since the flow cross-section of the gap 5 is relatively large, the flow velocity will decrease and the static pressure will increase accordingly. This design helps to form a higher fluid pressure at the connection between the stationary seal ring 1 and the dynamic seal ring 2 (i.e., the position where the liquid film is located) and improve the heat exchange effect.

[0032] Refer to Figure 1 , for the WB2 type mechanical seal structure of this embodiment, the inlet 31 and the outlet 32 are oppositely arranged on the collar 3 to maximize the distance between the inlet 31 and the outlet 32, thereby increasing the fluid flow path. Since the distance between the inlet 31 and the outlet 32 is maximized, the fluid flow path in the gap 5 is also extended. This means that when the fluid flows through the gap 5, it has more time and opportunities to exchange heat with the stationary and dynamic seal rings, so as to more effectively carry away the heat generated by friction.

[0033] For the WB2 type mechanical seal structure of this embodiment, there are multiple inlets 31, and each inlet 31 is arranged at intervals on the collar 3; there are multiple outlets 32, and each outlet 32 is arranged at intervals on the collar 3. The spaced inlets and outlets help to reduce the dead zone area of the fluid in the gap, enabling the fluid to cover the entire seal surface more fully and improving the sealing effect.

[0034] Refer to Figure 1 , for the WB2 type mechanical seal structure of this embodiment, a receiving groove 42 is further provided on the end cover 4. The receiving groove 42 is communicated with the shaft hole 41, and the shaft hole 41, the receiving groove 42 and the rotating shaft of the pump are coaxially arranged. The WB2 type mechanical seal structure further includes a felt, and the felt is arranged in the receiving groove 42. When the dynamic seal ring 2 rotates together with the rotating shaft of the pump, the felt surrounds the rotating shaft of the pump to block the gap 5.

[0035] Refer to Figure 1 , in the WB2 type mechanical seal structure of this embodiment, a gland 11 is further provided on the side of the static seal ring 1 away from the dynamic seal ring 2, and the static seal ring 1 is connected to the pump through the gland 11. When the dynamic seal ring 2 rotates together with the rotating shaft of the pump, the felt will closely surround the rotating shaft, effectively blocking the gap 5, reducing the possibility of fluid leakage through the gap, and significantly improving the reliability and safety of the seal. The softness and elasticity of the felt can buffer the direct contact between the dynamic seal ring 2 and the rotating shaft, reducing the wear caused by friction.

[0036] Refer to Figure 1 and Figure 3 , the WB2 type mechanical seal structure of this embodiment further includes fasteners and perforations 6. The perforations 6 respectively penetrate through the end cover 4 and the collar 3, so that the fasteners pass through the perforations 6 to fix the end cover 4 and the collar 3 on the gland 11. By passing the fasteners through the perforations 6 to tightly fix the end cover 4 and the collar 3 on the gland 11, this fastening method ensures the stability and reliability of the mechanical seal structure. Even in a working environment of high-speed rotation or high pressure, the integrity and sealing performance of the seal structure can be maintained. The design of the fasteners and the perforations effectively reduces the risk of loosening caused by vibration or impact, ensuring the long-term stable operation of the mechanical seal. The design of the perforations 6 allows the fasteners to easily pass through during the installation process, simplifying the installation steps and improving the work efficiency.

[0037] Refer to Figure 3 , in the WB2 type mechanical seal structure of this embodiment, there are multiple perforations 6, and the respective perforations 6 are arranged at intervals around the rotating shaft of the pump on the end cover 4 and the collar 3. The multiple perforations 6 are arranged at intervals around the rotating shaft, so that when the fasteners pass through these perforations, the fastening force can be more evenly distributed, which helps to reduce the deformation or damage caused by local stress concentration, thereby enhancing the stability and reliability of the entire mechanical seal structure.

[0038] It should be noted that the terms "first", "second", etc. in the specification, claims and the above-mentioned drawings of this application are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0039] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and will not be elaborated herein again.

[0040] The serial numbers of the above embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0041] In the above embodiments of the present application, the descriptions of the respective embodiments have their own focuses. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0042] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A mechanical seal structure of WB2 type, characterized in that, Comprising: A stationary seal ring (1), which is connected to the pump; A dynamic seal ring (2), which is sleeved on the rotating shaft of the pump. The dynamic seal ring (2) rotates together with the rotating shaft to achieve relative motion sealing with the stationary seal ring (1); A collar (3), which is sleeved on the stationary seal ring (1) and the dynamic seal ring (2); An end cover (4), which is arranged on the side of the dynamic seal ring (2) away from the stationary seal ring (1). There is a gap (5) between the stationary seal ring (1), the dynamic seal ring (2), the collar (3) and the end cover (4), so that fluid can flow in the gap (5) to heat exchange, clean and lubricate the stationary seal ring (1) and the dynamic seal ring (2). An axial hole (41) is provided on the end cover (4), and the rotating shaft of the pump passes through the axial hole (41).

2. The WB2 type mechanical seal structure according to claim 1, characterized in that, An inlet (31) and an outlet (32) are provided on the collar (3). Both the inlet (31) and the outlet (32) are communicated with the gap (5). The fluid enters the gap (5) through the inlet (31), and after heat exchange, cleaning and lubrication in the gap (5), it flows out from the outlet (32).

3. The WB2 type mechanical seal structure according to claim 2, characterized in that, A connecting groove (33) is further provided on the collar (3). One end of the connecting groove (33) is connected to the inlet (31), and the other end of the connecting groove (33) extends into the gap (5) to guide the fluid flow to the connection part of the stationary seal ring (1) and the dynamic seal ring (2).

4. The WB2 type mechanical seal structure according to claim 3, characterized in that, The diameter of the connecting groove (33) is smaller than the diameter of the outlet (32).

5. The WB2 type mechanical seal structure according to claim 2, wherein The inlet (31) and the outlet (32) are oppositely arranged on the collar (3) so that the distance between the inlet (31) and the outlet (32) is the largest, thereby increasing the flow path of the fluid.

6. The WB2 type mechanical seal structure according to claim 2, wherein, The inlet (31) is multiple, and each inlet (31) is arranged on the collar (3) at intervals; and / or, the outlet (32) is multiple, and each outlet (32) is arranged on the collar (3) at intervals.

7. The WB2 type mechanical seal structure according to claim 1, wherein, A receiving groove (42) is further provided on the end cover (4). The receiving groove (42) is communicated with the axial hole (41). The axial hole (41), the receiving groove (42) and the rotating shaft of the pump are coaxially arranged. The WB2 type mechanical seal structure further includes a felt, which is arranged in the receiving groove (42). When the dynamic seal ring (2) rotates together with the rotating shaft of the pump, the felt surrounds the rotating shaft of the pump to block the gap (5).

8. The WB2 type mechanical seal structure according to claim 7, characterized in that, A gland (11) is further provided on the side of the stationary seal ring (1) away from the dynamic seal ring (2). The stationary seal ring (1) is connected to the pump through the gland (11).

9. The WB2 type mechanical seal structure according to claim 8, characterized in that, The mechanical seal structure of type WB2 further includes a fastener and a perforation (6). The perforation (6) penetrates through the end cover (4) and the collar (3) respectively, so that the fastener passes through the perforation (6) to fix the end cover (4) and the collar (3) on the gland (11).

10. The mechanical seal structure of WB2 type according to claim 9, characterized in that, There are a plurality of the perforations (6), and each of the perforations (6) is arranged on the end cover (4) and the collar (3) at intervals around the rotation axis of the pump.

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