Mechanical seal dynamic ring structure with flow guiding function

Abstract

The utility model discloses a pump mechanical seal dynamic ring structure with the function of guiding flow relates to mechanical seal technical field, including water delivery pipe and with a plurality of adjusting structure of sealed connection. Adjusting structure is by the sealed connection end of the sleeve setting in the outside of water delivery pipe, connecting shell, adjusting pipe and integrated blocking plate are composed, and the adjusting pipe outside fixed adjusting plate and is connected with sealed connection end through reset spring. The water drop shaped lug is equipped in adjusting pipe and is used for optimizing water flow path, and the shunt water channel is seted up in connecting shell, and the near end of adjusting pipe is equipped with the water outlet. When water flow pressure exceeds spring resistance, adjusting pipe and blocking plate move along the sliding groove, make the water outlet and shunt water channel alignment, realize shunt pressure relief, and impact buffer inclined plane and lug cooperate and disperse water flow impact, reduce turbulent flow and energy loss.

Description

Technical Field

[0001] This utility model provides a mechanical seal dynamic ring structure, and particularly relates to a pump mechanical seal dynamic ring structure with flow guiding function. Background Technology

[0002] In the field of pump machinery, a sealing ring structure is typically used to ensure a tight seal between the water delivery pipe and the pump body, preventing liquid leakage. Traditional pump mechanical seals mainly consist of a stationary ring, a rotating ring, and a spring. Their core function is to maintain a sealed state during pump operation through the tight fit between the rotating and stationary rings, preventing liquid leakage from the connection between the water delivery pipe and the pump body, thereby ensuring the normal operation and efficiency of the pump.

[0003] Existing pump mechanical seal dynamic ring structures primarily employ a simple spring-loaded pressure method to ensure tight contact between the dynamic and stationary rings for a sealing effect. However, this structure presents several problems. Firstly, traditional sealing dynamic ring structures lack effective flow diversion design. During pump operation, water flow directly impacts the dynamic and stationary rings, easily leading to excessive local pressure, increasing wear on the sealing components, and shortening their service life. Secondly, existing structures have limited adjustment capabilities, failing to adjust the contact force and position between the dynamic and stationary rings in a timely manner according to changes in water pressure. This makes it difficult to meet the sealing requirements under different operating conditions, especially under high pressure or high flow conditions, where seal failure is more likely. Furthermore, traditional sealing dynamic ring structures are insufficient in buffering water flow impact, easily causing vibration of the dynamic and stationary rings due to water flow impact, affecting the sealing effect and pump stability. Utility Model Content

[0004] To address the aforementioned problems, this application provides a pump mechanical seal dynamic ring structure with a flow-guiding function, thus resolving issues in the prior art such as excessive local pressure, limited regulation capability, and insufficient shock buffering caused by the lack of flow-diverting design.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a pump mechanical seal dynamic ring structure with flow guiding function, including a water delivery pipe, wherein a plurality of adjustment structures are sealed and connected on the water delivery pipe, the adjustment structure includes a sealed connection end sleeved outside the water delivery pipe, an adjustment pipe is provided between the sealed connection ends, and a baffle plate is integrally connected to the end of the adjustment pipe away from the water flow direction.

[0006] An adjustment plate is fixedly connected to the outside of the adjustment tube, and a return spring is fixedly connected to one end of the adjustment plate near the blocking plate.

[0007] Preferably, the sealing connection end is provided with a plurality of evenly distributed mounting holes that penetrate itself, and the mounting holes are provided with locking pins corresponding to the water supply pipe; the sealing connection end is embedded with a plurality of sealing rubber rings.

[0008] Preferably, a connecting shell is integrally provided between the sealing connection ends, the connecting shell is sleeved on the outside of the regulating tube, and an impact buffer slope is provided at the end of the regulating tube and the baffle plate that are far apart from each other.

[0009] Preferably, the regulating tube has several evenly distributed teardrop-shaped protrusions that are integrally connected to itself, and the water flow washes over the protrusions; the connecting shell has sliding grooves corresponding to the regulating plate and the return spring.

[0010] Preferably, the connecting shell has a diversion channel inside that corresponds to the adjustment structure. The openings at both ends of the diversion channel rest on the side walls of the adjustment pipe and the baffle plate, respectively, and the length of the diversion channel is less than the sum of the lengths of the adjustment pipe and the baffle plate.

[0011] Preferably, the regulating pipe has several outlets penetrating through it at one end near the baffle plate. The outlets are located between the two openings of the diversion channel. The length of the baffle plate is less than the length of the sliding groove, ensuring that the outlets can be aligned with the openings of the diversion channel after the baffle plate and the regulating pipe are moved.

[0012] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0013] When this utility model is in use, after the water flows into the water supply pipe, it impacts the teardrop-shaped protrusion on the regulating pipe. When the impact pressure is greater than the elastic force of the return spring, the regulating pipe and the baffle plate move along the sliding groove. At this time, the two ends of the diversion channel are aligned with the outlet on the regulating pipe in turn, and the water flows from the diversion channel to branch, thereby relieving the pressure in the water supply pipe.

[0014] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the installation of a pump mechanical seal dynamic ring structure with flow guiding function according to this utility model;

[0016] Figure 2 This is a cross-sectional view of the dynamic ring structure of a pump mechanical seal with flow guiding function according to this utility model;

[0017] Figure 3 This is a schematic diagram of the adjustment structure of the dynamic ring structure of a pump mechanical seal with flow guiding function according to this utility model;

[0018] Figure 4 This is a three-dimensional schematic diagram of the regulating pipe of the pump mechanical seal dynamic ring structure with flow guiding function according to this utility model.

[0019] As shown in the figure:

[0020] 1. Water supply pipe; 2. Adjustment structure; 3. Sealed connection end; 4. Adjustment pipe; 5. Baffle plate; 6. Adjustment plate; 7. Return spring; 8. Mounting hole; 9. Locking pin; 10. Sealing rubber ring; 11. Connecting shell; 12. Impact buffer slope; 13. Protrusion; 14. Sliding groove; 15. Diversion channel; 16. Water outlet. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] like Figure 1 and Figure 2As shown, a pump mechanical seal dynamic ring structure with flow guiding function mainly includes a water delivery pipe 1 and several regulating structures 2. The regulating structure 2 consists of a sealing connection end 3 sleeved outside the water delivery pipe 1, a regulating pipe 4 located between the sealing connection ends 3, a baffle plate 5 connected to the end of the regulating pipe 4 away from the water flow, a regulating plate 6 fixed outside the regulating pipe 4, and a return spring 7 connected to one end of the regulating plate 6. The sealing connection end 3 has evenly distributed mounting holes 8, each equipped with a locking pin 9 corresponding to the water delivery pipe 1, and a sealing rubber ring 10 embedded within it. A connecting shell 11 is integrally connected between the sealing connection ends 3, and impact buffer slopes 12 are provided at the mutually distant ends of the regulating pipe 4 and the baffle plate 5. In this embodiment, the components work closely together to achieve efficient flow diversion and pressure regulation. When water flows into regulating pipe 4, if the impact force exceeds the elastic resistance of return spring 7, regulating pipe 4 and baffle plate 5 move along sliding groove 14, aligning the openings at both ends of diversion channel 15 with outlet 16 on regulating pipe 4. Water flows through branch channels 15, reducing pressure in water supply pipe 1. The protrusion 13 inside regulating pipe 4 optimizes the water flow path, reducing eddies and energy loss. Impact buffer slope 12 effectively mitigates the direct impact of water flow on regulating pipe 4 and baffle plate 5, extending component life. The overall structure significantly improves pump sealing performance, operational stability, and service life, effectively solving problems such as easy wear of sealing structures, limited regulating capacity, and insufficient buffering in existing technologies.

[0025] like Figure 3 and Figure 4 As shown, inside the pump mechanism, teardrop-shaped protrusions 13 are evenly distributed inside the regulating pipe 4. Water flow can directly impact and wash over these protrusions, producing a guiding effect. The connecting shell 11 has a diversion channel 15 inside. The openings at both ends of the diversion channel rest against the side walls of the regulating pipe 4 and the baffle plate 5, respectively. The length of the diversion channel is less than the sum of the lengths of the regulating pipe and the baffle plate, thereby controlling the water flow path. Several outlets 16 are located at the end of the regulating pipe 4 near the baffle plate 5, between the openings at both ends of the diversion channel 15. Through the operation of the regulating mechanism, the baffle plate 5 and the regulating pipe 4 can move, allowing the outlets 16 to precisely align with the openings of the diversion channel 15, achieving the directional guidance and regulation function of the water flow.

[0026] In this implementation scheme, the composition and parameters of each component are as follows:

[0027] The regulating pipe 4 is a stainless steel pipe with an inner diameter of 10-20mm and a length of 50-100mm. 5-10 teardrop-shaped protrusions 13 are evenly distributed inside the pipe, with a protrusion height of 2-3mm, which can make the water flow form an orderly swirling flow and produce a good guiding effect.

[0028] The connecting shell 11 is made of carbon steel with a thickness of 3-5mm. The length of the diversion channel 15 is 30-60mm, and its length is less than the sum of the lengths of the regulating pipe 4 and the baffle plate 5 (the length of the regulating pipe is 40-70mm, and the length of the baffle plate is 20-30mm), so as to precisely control the water flow path.

[0029] The regulating pipe 4 has 3-6 outlets 16 near the baffle plate 5, with an outlet diameter of 3-5mm, located between the openings (opening width 5-8mm) at both ends of the diversion channel 15.

[0030] The spring constant of the return spring 7 is 10-20 N / m. When the impact force of the water flow exceeds its elastic limit, it can drive the regulating pipe 4 and the baffle plate 5 to move smoothly, so that the outlet 16 is precisely aligned with the opening of the diversion channel 15, thereby realizing the directional guidance and regulation function of the water flow.

[0031] In one or more feasible embodiments, the following are supplementary descriptions based on existing technical solutions and implementation methods:

[0032] In conventional pump mechanical seal systems, the sealing ring structure typically consists of the following components:

[0033] Stationary ring assembly: rigidly fixed to the pump housing by flange, and axially fixed by bolts and sealing gaskets.

[0034] Dynamic ring assembly: It is connected to the pump shaft via a keyway and rotates with the shaft. Its end face is precisely ground with the end face of the stationary ring to form a sealing pair.

[0035] Spring loading mechanism: Multiple sets of helical springs are evenly distributed around the back of the moving ring, and the moving ring is pressed against the stationary ring by the preload.

[0036] Auxiliary seals: An O-ring is installed between the stationary ring and the pump housing, and a bellows seal is installed between the rotating ring and the shaft.

[0037] Traditional installation process:

[0038] Secure the stationary ring assembly to the pump housing end face using flange bolts, and tighten it to the standard torque using a torque wrench.

[0039] The rotating ring assembly is mounted on the pump shaft and connected by a key to ensure synchronous rotation;

[0040] Install a spring loading mechanism and compress the spring to a preset pressure value by adjusting the nut.

[0041] After the pump body is started, the spring pressure maintains the end faces of the dynamic ring and the stationary ring in contact, and the sealing pair prevents the medium from leaking.

[0042] Limitations are evident in:

[0043] Lack of dynamic adjustment: The spring preload is fixed and cannot respond to water pressure fluctuations. When the pressure inside the water pipe suddenly increases, the contact pressure between the moving ring and the stationary ring exceeds the design threshold, leading to abnormal wear or even cracking of the end face.

[0044] No-splitter buffer design: High-speed water flow directly impacts the end face of the moving ring. Especially under high pressure conditions, the water flow impact force is opposite to the spring force, which can easily cause the axial displacement of the moving ring to become unstable and lead to leakage.

[0045] Maintenance complexity: Traditional structures require periodic disassembly of the pump body to replace the entire set of sealing components, which is time-consuming and affects the continuous operation of the equipment.

[0046] 2. Collaborative Implementation Methods of This Application and Prior Art

[0047] The innovative structure of this application can be seamlessly integrated with existing pump bodies and transmission components, and the specific implementation compatibility is as follows:

[0048] Connection compatibility: The sealed connection end is engaged with the standardized flange interface of the water supply pipe through a locking pin, and the distribution of the mounting holes matches the existing flange bolt hole positions, ensuring that it can be installed without modifying the existing pump body.

[0049] Dynamic adjustment linkage: When the pump body starts, the existing drive motor drives the pump shaft to rotate. The adjustment tube of this application forms a floating connection with the reset spring through its external adjustment plate, so that the adjustment tube can slide along the axis and realize dynamic following with the movement of the pump shaft.

[0050] Pressure Coordination Control: Existing pressure sensors can monitor the pressure inside the pipe in real time. When the pressure exceeds the set threshold, the regulating pipe of this application moves under hydraulic action to overcome the resistance of the reset spring. The pressure inside the pipe is reduced through the diversion effect of the diversion channel, forming a closed-loop linkage with the existing control system.

[0051] 3. Enhanced application of relevant components in existing technologies

[0052] Optimization of sealing rubber ring: Based on existing nitrile rubber materials, a multi-layer composite structure is adopted and embedded in the annular groove of the sealing connection end to enhance radial sealing performance through hydraulic self-tightening effect.

[0053] Hydrodynamic design of impact buffer ramp: Based on the NACA airfoil theory in the existing technology, the ramp angle is set to 15°-25° to generate the wall adhesion effect when the water flows impacts, thereby reducing the turbulence intensity.

[0054] Anti-loosening design of locking pin: Adopting the existing double nut locking structure, combined with threaded adhesive for fixation, to ensure the positional stability of the adjustment structure under vibration conditions.

[0055] 4. Integration of this application with existing processes

[0056] During pump assembly, the installation steps of the structure in this application are compatible with traditional processes:

[0057] Pre-treatment stage: The sealing rubber ring is frozen to -50℃ and pressed into the reserved groove at the sealing connection end to achieve an interference fit by utilizing the principle of thermal expansion and contraction;

[0058] Component assembly: Slide the entire adjustment structure onto the water supply pipe, insert the locking pin, and then use a hydraulic tensioner to tighten it to the designed preload using a graded loading method;

[0059] Dynamic adjustment: After starting the pump, the axial displacement of the regulating tube is detected by the existing laser alignment instrument, and the pre-compression of the reset spring is finely adjusted to the optimal response range.

[0060] With the above additions, this application, while retaining the mature processes and components in the existing technology, significantly improves the adaptability, reliability and service life of the sealing system through innovative flow guiding structure, dynamic adjustment mechanism and flow diversion buffer design, while ensuring compatibility and feasibility with the existing pump body structure.

[0061] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A pump mechanical seal dynamic ring structure with flow guiding function, comprising a water delivery pipe (1), characterized in that: The water supply pipe (1) is sealed with several adjustment structures (2). The adjustment structure (2) includes a sealed connection end (3) sleeved on the outside of the water supply pipe (1). An adjustment pipe (4) is provided between the sealed connection ends (3). A baffle plate (5) is integrally connected to the end of the adjustment pipe (4) away from the water flow direction. An adjustment plate (6) is fixedly connected to the outside of the adjustment tube (4), and a return spring (7) is fixedly connected to one end of the adjustment plate (6) near the blocking plate (5).

2. The pump mechanical seal dynamic ring structure with flow guiding function according to claim 1, characterized in that: The sealing connection end (3) is provided with several evenly distributed mounting holes (8) that penetrate itself, and the mounting holes (8) are provided with locking pins (9) corresponding to the water pipe (1); the sealing connection end (3) is provided with several sealing rubber rings (10).

3. The pump mechanical seal dynamic ring structure with flow guiding function according to claim 1, characterized in that: A connecting shell (11) is integrally provided between the sealing connection ends (3). The connecting shell (11) is sleeved on the outside of the regulating tube (4). An impact buffer slope (12) is provided at the end of the regulating tube (4) and the baffle plate (5) that are far apart from each other.

4. The pump mechanical seal dynamic ring structure with flow guiding function according to claim 3, characterized in that: The regulating pipe (4) has several evenly distributed teardrop-shaped protrusions (13) that are integrated with itself, and the water flow washes over the protrusions (13); the connecting shell (11) has sliding grooves (14) corresponding to the regulating plate (6) and the reset spring (7).

5. The pump mechanical seal dynamic ring structure with flow guiding function according to claim 3, characterized in that: The connecting shell (11) has a diversion channel (15) inside that corresponds to the adjustment structure (2). The openings at both ends of the diversion channel (15) are respectively against the side walls of the adjustment pipe (4) and the baffle plate (5), and the length of the diversion channel (15) is less than the sum of the lengths of the adjustment pipe (4) and the baffle plate (5).

6. The pump mechanical seal dynamic ring structure with flow guiding function according to claim 5, characterized in that: The regulating pipe (4) has several outlets (16) that penetrate it at one end near the baffle plate (5). The outlets (16) are located between the two openings of the diversion channel (15). The length of the baffle plate (5) is less than the length of the sliding groove (14) to ensure that after the baffle plate (5) and the regulating pipe (4) move, the outlets (16) can be aligned with the openings of the diversion channel (15).

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